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CN114645969B - Integrated flow measurement and regulation device with split structure - Google Patents

Integrated flow measurement and regulation device with split structure Download PDF

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Publication number
CN114645969B
CN114645969B CN202210348081.9A CN202210348081A CN114645969B CN 114645969 B CN114645969 B CN 114645969B CN 202210348081 A CN202210348081 A CN 202210348081A CN 114645969 B CN114645969 B CN 114645969B
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China
Prior art keywords
baffle
measuring
electrode
cavity
flow
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CN202210348081.9A
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Chinese (zh)
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CN114645969A (en
Inventor
丁云
陈永佳
吴伟康
梁益伟
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Hangzhou Yungu Science & Technology Co ltd
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Hangzhou Yungu Science & Technology Co ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/04Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0245Curtain gate valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30Details
    • F16K3/314Forms or constructions of slides; Attachment of the slide to the spindle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30Details
    • F16K3/34Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/53Mechanical actuating means with toothed gearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

本发明公开了对开结构的一体化流量测量和调节装置,包括外壳、测量腔左壁、测量腔右壁、第一电极、第二电极、第一挡板、第二挡板;外壳形成具有流道入口和流道出口的腔体,测量腔左壁位于腔体的一侧且固定,测量腔右壁位于腔体的另一侧且固定;测量腔左壁和测量腔右壁之间的空间形成测量腔,测量腔连接外壳的流道入口和流道出口;测量腔左壁设置第一电极,测量腔右壁设置第二电极;在流道出口设置有可移动的第一挡板和第二挡板。所述装置用途为平衡热量表、供热测控终端、带阀门的户用热量表、带流量测量的平衡阀。本发明流速调节时,挡板移动采用对称布置,降低调节过程的流速测量误差;驱动轴的布置,实现阀门挡板低扭矩驱动。

The present invention discloses an integrated flow measurement and regulation device of a split structure, including a shell, a left wall of a measuring chamber, a right wall of the measuring chamber, a first electrode, a second electrode, a first baffle, and a second baffle; the shell forms a cavity with a flow channel inlet and a flow channel outlet, the left wall of the measuring chamber is located on one side of the cavity and is fixed, and the right wall of the measuring chamber is located on the other side of the cavity and is fixed; the space between the left wall of the measuring chamber and the right wall of the measuring chamber forms a measuring chamber, and the measuring chamber connects the flow channel inlet and the flow channel outlet of the shell; the first electrode is arranged on the left wall of the measuring chamber, and the second electrode is arranged on the right wall of the measuring chamber; a movable first baffle and a second baffle are arranged at the flow channel outlet. The device is used for a balanced heat meter, a heating measurement and control terminal, a household heat meter with a valve, and a balanced valve with flow measurement. When the present invention adjusts the flow rate, the baffle movement adopts a symmetrical arrangement to reduce the flow rate measurement error in the adjustment process; the arrangement of the drive shaft realizes low-torque drive of the valve baffle.

Description

Integrated flow measuring and adjusting device of split structure
Technical Field
The invention discloses an integrated flow measurement and adjustment device with a split structure, which relates to the technical fields of electromagnetic flow sensors, control valves, flow accurate measurement, flow accurate control, quantitative control, meter valve integration, heat metering and the like, in particular to the fields of accurate measurement, heat metering, flow and heat balance of a central heating system and an air conditioner of a water system, flow metering, quantitative control and the like in urban water supply and drainage, agricultural irrigation and production processes. The invention is suitable for products such as balance calorimeters, heat metering devices with built-in control valves, heat supply measurement and control terminals with integrated flow sensors and control valves, electromagnetic flow meters, water meters, balance valves, regulating valves, control valves and the like.
Background
An electromagnetic flowmeter is a flow measuring instrument based on Faraday electromagnetic induction principle, and the basic principle is that when fluid with a conductive medium passes through a magnetic field, the fluid cuts magnetic force lines, induced potential is generated in the vertical direction of the magnetic field, the amplitude of the induced potential is in direct proportion to the flow velocity of the fluid, and therefore the flow velocity of the fluid and the flow rate of the fluid are obtained. In order to generate a magnetic field, an excitation coil is arranged around the measuring cavity, the generated magnetic field passes through the fluid, so that induced potential is generated in the fluid, and electrodes are arranged at the positive and negative positions of the induced potential, so that the magnitude of the induced potential can be measured. The electromagnetic flowmeter has wide application in flow measurement, and has the advantages of high measurement precision, good linearity, no structural member in the measurement cavity, pollution resistance and the like.
The control valve is a device for controlling the flow rate of fluid, and comprises a single-seat regulating valve, a double-seat regulating valve, a ball valve, a half ball valve, a butterfly valve, a gate valve and the like according to different structural forms. The main components of the control valve comprise a valve core and a valve body, wherein the valve core is positioned in the valve body and can rotate or move relative to the valve body, so that the opening degree of the control valve is adjusted. In order to realize different flow control characteristic curves such as equal percentage, linearity and the like, the valve core is designed into various curve shapes such as V shape or W shape so as to meet the requirements of different flow adjustment. The V-shaped or W-shaped through holes of the valve core of the valve corresponding to the horizontal rotation are all arranged in the horizontal direction.
The electromagnetic flowmeter and the control valve are combined together to form the control valve with the built-in electromagnetic flow sensor, so that the measurement and adjustment of the flow are realized at the same time. In the prior art, a cylindrical valve core is arranged in a valve body, the valve core is provided with a through hole, is connected with the inlet and outlet of the valve body. An electrode is arranged in the valve core and used for collecting potential signals of the flow sensor. The valve core rotates to adjust the flow passage area of the control valve so as to achieve the purpose of flow speed adjustment.
The prior art integrated device of an electromagnetic flow sensor and a valve is disclosed in a patent ZL201210301767.9 'integrated device of electromagnetic flow measurement and control', which comprises a valve body, a valve core and a valve rod, wherein the valve body comprises a water inlet pipe, a cavity, a water outlet pipe, a cavity cover and a coil, the cavity is positioned between the water inlet pipe and the water outlet pipe, the cavity and the cavity cover form a cavity with an open top, the valve core is arranged in the cavity, the valve core is provided with a through hole for connecting the water inlet pipe and the water outlet pipe, the valve core comprises a second magnetic core, a first electrode, a second electrode and a lead wire, the second magnetic core is positioned above the through hole of the valve core, the first electrode and the second electrode are symmetrically distributed on the inner walls of the two sides of the through hole, the lead wire is in a reverse fork shape, and the two ends of a fork head of the lead wire are respectively connected with the first electrode, The valve rod is positioned at the top of the valve core and extends out of a cavity with an opening at the top formed by the cavity and the cavity cover, and a sealing ring is arranged between the valve rod and the cavity cover for connection. The patent ZL201210301750.3 'a flow measurement and control integrated device' discloses another arrangement structure, which comprises a valve body, a valve core and a valve rod, wherein the valve body comprises a water inlet pipe, a cavity, a water outlet pipe and a cavity cover, the cavity is arranged between the water inlet pipe and the water outlet pipe, the cavity and the cavity cover form a cavity with an opening at the top, the valve core is arranged in the cavity, the valve core is provided with a through hole for connecting the water inlet pipe and the water outlet pipe, the valve core comprises a coil, a first electrode, a second electrode and a lead wire, the first electrode and the second electrode are symmetrically arranged at two ends of the through hole, the lead wire is in a reverse fork shape, two ends of a fork head of the lead wire are respectively connected with the first electrode and the second electrode, a fork rod of the lead wire extends out from the valve rod, the valve rod is arranged at the top of the valve core and extends out of the cavity with the cavity cover forming a cavity with the opening at the top, and a sealing ring is arranged between the valve rod and the cavity cover. The patent ZL201310196992.5 'valve and electromagnetic flowmeter integrated device and application thereof' discloses another arrangement structure, which comprises a valve core, a magnetic conduction plate, a first electrode, a second electrode, a first lead, a second lead, a circuit board, a valve body, a valve cover, a coil, a magnetic core, a framework and a U-shaped steel sleeve. The valve body and the valve cover form a cavity with a top and a horizontal opening, and the valve core is positioned in the cavity. The valve core comprises a through hole connected with the horizontal opening of the cavity and is divided into an upper through hole and a lower through hole by a magnetic conductive plate, a first electrode and a second electrode are respectively positioned at the left side and the right side of the lower through hole, the first electrode is connected with the circuit board through a first lead, and the second electrode is connected with the circuit board through a second lead. The coil surrounds the magnetic core, is located below the valve core, and is arranged in the U-shaped steel sleeve. The magnetic conduction plate, the magnetic core and the U-shaped steel sleeve are all magnetic conductors. The invention arranges the sensor of electromagnetic flowmeter in the valve core, and divides the through hole of valve core into upper through hole and lower through hole by the magnetic conductive plate, the magnetic field is concentrated in the lower through hole, the electrode is arranged on both sides of the lower through hole, the coil is positioned under the valve core, thus realizing the integration of valve and electromagnetic flowmeter. The patent ZL201910471279.4 'an integrated device of an electromagnetic flow sensor and a valve' discloses an arrangement structure, which comprises a valve core, a valve body, a coil, a W-shaped steel sleeve, a first magnetic conduction column and a second magnetic conduction column, wherein the valve body forms a cavity with a top part and a front and a rear opening, the valve core is positioned in the cavity and can horizontally rotate and move, the valve core is provided with a horizontal through hole for connecting the front and the rear opening of the valve body, the valve core comprises a U-shaped first electrode and a second electrode which are oppositely arranged and are electrically connected with a printed circuit board through first conductive plastic and second conductive plastic, the coil is arranged in the W-shaped cavity of the W-shaped steel sleeve and positioned below the valve body, a magnetic conduction plate is arranged between the coil and the first magnetic conduction column, the second magnetic conduction posts are respectively positioned at the left side and the right side of the valve body, the lower part of the second magnetic conduction posts are respectively connected with the left side and the right side of the W-shaped steel sleeve, and the upper part of the second magnetic conduction posts are connected with the left side and the right side of the magnetic conduction cover above the valve body.
In the above prior art, the electrodes are all disposed within the valve cartridge and are integrated with the valve cartridge. When the valve core rotates, the electrode also rotates. The valve core in the prior art is cylindrical, when the valve core rotates for a certain angle, the valve core through hole and the flow channel inlet and the flow channel outlet of the valve body are staggered to form an irregular S-shaped flow channel, so that the manifold of the fluid medium is changed greatly to cause measurement errors, and therefore, in the prior art, the influence of the manifold needs to be corrected at different valve core positions, and the influence of the manifold cannot be completely eliminated, so that accurate measurement cannot be realized.
In the control valve with the built-in electromagnetic flow sensor in the prior art, the magnetizers cannot be uniformly distributed along the rotating circumference of the valve core, when the valve core rotates and moves, the distributed magnetic field in the valve core through hole changes, and the change of the magnetic field intensity in the valve core through hole can cause the change of an electrode signal due to the proportional relation between the induced potential on the electrode and the magnetic field intensity, so that the measured flow velocity needs to be corrected according to the magnetic field intensity at different valve core positions in the prior art, and the magnetic field intensity in the valve core through hole has certain uncertainty due to inaccurate valve core positions, so that the accurate measurement of the flow is influenced.
In the prior art, when the valve core rotates, friction exists between the valve core and the valve body, and the valve core can be rotated by a large moment. In the prior art, the valve core is driven by the valve rod to rotate, when the diameter of the valve core is larger, such as the moment of a large-caliber control valve is larger, the valve rod needs to provide larger driving moment to drive the valve core, so that the flow regulation is inaccurate.
In the control valve of the built-in electromagnetic flow sensor in the prior art, the electrode is made of a metal material, the contact area of the electrode and a fluid medium is in a dot shape, the contact area is small, the resistance is large, the random noise is large, passivation treatment is required to be carried out on the surface of the electrode, the plastic materials of the electrode and the valve core cannot be tightly combined, additional waterproof sealing is required, for example, conductive plastic is adopted for secondary injection molding sealing, and the manufacturing process and the assembly process are complex.
In the prior art, a control valve with an electromagnetic flow sensor is arranged, an electrode is arranged in a valve core, so that a flow field and a magnetic field change when the valve core rotates, and the flow velocity of a fluid medium cannot be accurately measured. Therefore, the flow rate adjustment of the prior art cannot achieve synchronous measurement of the flow rate when the spool rotates, and adjust the movement of the spool according to the measured flow rate. Therefore, the flow rate adjustment in the prior art has poor accuracy, low adjustment speed, more adjustment times and frequent action.
In the control valve with the built-in electromagnetic flow sensor in the prior art, the flow regulation characteristic curve of the valve core is nearly linear, and the sensitivity is lower during micro flow regulation, so that the regulation of high-precision micro flow cannot be realized. The valve with a common rotating structure has a V-shaped or W-shaped opening of a valve core, which is arranged in the horizontal direction, and is combined with a flow sensor to seriously influence the measurement accuracy of the flow, so that the valve cannot be integrated together for use.
With the development of intelligent heating systems and the need of energy management, the metering of heat energy, digital management and precise dispatching of heat energy become key to energy conservation. What is needed is a solution for realizing high-precision flow and heat measurement and high-precision flow and heat adjustment to meet the requirements of an intelligent heating system on heat metering, digital management and scheduling, but the prior art does not see an integrated scheme for realizing high-precision flow measurement and regulation.
In summary, the regulating valve with the built-in electromagnetic flow sensor in the prior art has the following problems:
1) The electrode rotates along with the valve core, so that manifold changes, and flow measurement accuracy is affected;
2) The electrode rotates along with the valve core, the distribution magnetic field changes, and the flow measurement accuracy is affected;
3) The valve core is driven by the valve rod to rotate, so that the moment is large, and the valve core is inaccurate in action;
4) The adoption of the point electrode has large signal noise and is not easy to seal;
5) The flow rate cannot be synchronously acquired with high precision during the flow rate adjustment, so that the adjustment precision is poor, the speed is low and the action is frequent;
6) The flow regulation characteristic curve of the valve core is approximately linear, and the sensitivity is lower during micro flow regulation.
Disclosure of Invention
The invention aims to provide an integrated flow measurement and adjustment device with a split structure, which solves the problems of low measurement precision caused by manifold change and magnetic field change, inaccurate valve core action caused by large driving moment, large noise caused by a point electrode, poor flow speed adjustment precision, low adjustment speed, frequent action, low small flow adjustment sensitivity and the like after the valve core rotates in the prior art, and particularly solves the technical problems of high-precision flow measurement, accurate and quick valve control and the like of a balance heat meter, a heat supply measurement and control terminal device and an intelligent balance valve.
An integrated flow measuring and regulating device with a split structure comprises a shell, a measuring cavity left wall, a measuring cavity right wall, a first electrode, a second electrode, a first baffle, a second baffle, a flow channel inlet and a flow channel outlet, wherein the shell forms a cavity body which is connected with the flow channel inlet and the flow channel outlet, the measuring cavity left wall is positioned and fixed on one side of the cavity body, the measuring cavity right wall is positioned and fixed on the other side of the cavity body, a measuring cavity is formed in a space between the measuring cavity left wall and the measuring cavity right wall, the measuring cavity is connected with the flow channel inlet and the flow channel outlet of the shell, so that a flow channel through which fluid media passes is formed, the measuring cavity left wall is provided with a first electrode, the measuring cavity right wall is provided with a second electrode, the first electrode and the second electrode are in contact with the fluid media in the measuring cavity and used for measuring induction potential generated by the fluid media, one side close to the flow channel outlet is provided with a movable first baffle, and the other side close to the flow channel outlet is provided with a movable second baffle.
The left wall of the measuring cavity, the right wall of the measuring cavity, the first electrode, the second electrode, the first baffle and the second baffle are symmetrically distributed according to the central axis of the flow channel, so that high-precision measurement of flow is facilitated.
One end of the first baffle and one end of the second baffle can move towards the central axis of the flow channel, and the other end of the first baffle and the second baffle can move or rotate, so that the flow area of the flow channel is adjusted.
The moving tracks of the first baffle and the second baffle are symmetrical circular arcs.
A first driving shaft and a second driving shaft are arranged between the measuring cavity and the shell, the first driving shaft pushes the first baffle to move when rotating, and the second driving shaft pushes the second baffle to move when rotating.
The first driving shaft and the first baffle are provided with mutually fitted gears, and the second driving shaft and the second baffle are provided with mutually fitted gears.
The flow passage outlet of the shell is provided with an annular sealing gasket, the contact surfaces of the sealing gasket and the first baffle plate and the second baffle plate are provided with elastic sealing materials such as polytetrafluoroethylene, rubber, silica gel, thermoplastic elastomer and the like, so that the tightness of the first baffle plate and the second baffle plate relative to the shell is enhanced.
The middle part of the runner outlet 11 of the shell 1 is further provided with a vertical upright post, and the contact surfaces of the upright post and the first baffle plate and the second baffle plate are provided with elastic sealing materials such as polytetrafluoroethylene, rubber, silica gel, thermoplastic elastomer and the like so as to strengthen the tightness between the first baffle plate and the second baffle plate.
The first baffle plate is provided with a first elastic body on one side surface close to the flow channel outlet, and the second baffle plate is provided with a second elastic body on one side surface close to the flow channel outlet. The first elastomer and the second elastomer are made of elastic sealing materials, such as polytetrafluoroethylene, rubber, silica gel, thermoplastic elastomer and the like, so that sealing after the baffle is closed is facilitated.
The first elastic body is adhered to the surface of the first baffle plate by adopting a secondary injection molding process, and the second elastic body is adhered to the surface of the second baffle plate by adopting a secondary injection molding process.
The cross section of the end surfaces of the first baffle plate and the second baffle plate, which are in contact with each other, is provided with a first curve and a second curve with W-shaped or V-shaped shape characteristics, so that a V-shaped or W-shaped opening in the vertical direction is formed, and the flow regulation characteristic under the condition of small opening is improved.
The shell comprises a shell body, wherein a first U-shaped groove is formed in the outer side of the first baffle, a first protruding stop is arranged on the surface of one side of the cavity of the shell body, the first stop is located in the first U-shaped groove and used for limiting when the first baffle moves, a second protruding stop is arranged on the surface of the other side of the cavity of the shell body, a second U-shaped groove is formed in the outer side of the second baffle, and the second stop is located in the second U-shaped groove and used for limiting when the second baffle moves.
The cavity of the shell is provided with a first protruding stop block on one side surface close to the inlet of the flow channel for limiting the movement of the first baffle plate, and a second protruding stop block on the other side surface close to the inlet of the flow channel for limiting the movement of the second baffle plate.
The left wall of the measuring cavity is provided with a first protruding stop block at the outer side close to the inlet of the flow channel for limiting the movement of the first baffle. The right wall of the measuring cavity is provided with a protruding second stop block at the outer side close to the inlet of the flow channel for limiting the movement of the second baffle.
The shell is made of conductive materials such as metal, conductive plastic and the like.
The left wall of the measuring cavity and the right wall of the measuring cavity are made of insulating plastics, the first electrode and the second electrode are made of conductive plastics, and the insulating plastics and the conductive plastics are tightly combined by adopting a secondary injection molding process.
The vertical height of the contact surface of the first electrode and the second electrode with the fluid medium is larger than the horizontal width so as to reduce electrode noise and facilitate high-precision measurement of flow.
And when the first baffle plate and the second baffle plate move, the electric potentials of the first electrode and the second electrode are measured, so that the flow velocity of the fluid medium is obtained, and the high-precision adjustment of the flow rate is facilitated.
The invention provides a method for reducing influence of manifold on flow measurement accuracy during flow rate adjustment. The fixed measuring cavity is arranged in the cavity of the valve body, and an electrode of an electromagnetic flow sensor is arranged in the cavity and is used for measuring the speed of fluid. The runner inlet of the valve body is in butt joint with the measuring cavity and is used as an inlet of fluid medium. When the fluid is regulated, the measuring cavity is fixed, so that the change of the flow channel does not exist, and the measuring cavity does not cause the change of manifold. Meanwhile, a first baffle plate and a second baffle plate which are symmetrical are arranged between the measuring cavity and the shell, and the first driving shaft and the second driving shaft are used for driving simultaneously, so that the flow speed is regulated. Since the first baffle plate and the second baffle plate move symmetrically, the outlet of the measuring cavity is of a symmetrical retraction structure during flow regulation, and the flow deformation of the fluid is small. According to the characteristics of the electromagnetic flow sensor, the outlet of the measuring cavity adopts a symmetrical taper retraction design, so that the influence on the measuring precision is negligible.
The invention provides a method for reducing the influence of a magnetic field on flow measurement accuracy during flow rate adjustment. The fixed measuring cavity is arranged in the cavity of the valve body, and an electrode of an electromagnetic flow sensor is arranged in the cavity and is used for measuring the speed of fluid. Meanwhile, a first baffle plate and a second baffle plate which are symmetrical are arranged between the measuring cavity and the shell, and the first driving shaft and the second driving shaft are used for driving simultaneously, so that the flow speed is regulated. The first baffle and the second baffle can not influence the magnetic field distribution of the measuring cavity when moving, so that the flow rate measurement accuracy is not influenced when the flow rate is adjusted.
The invention provides a valve driving method with low torque and high precision. The invention is provided with a first baffle plate, a second baffle plate, a first driving shaft and a second driving shaft between the measuring cavity and the shell. The first driving shaft and the first baffle are provided with mutually fitted gears, the second driving shaft and the second baffle are provided with mutually fitted gears, and when the first driving shaft and the second driving shaft rotate, the first baffle and the second baffle are driven to move, so that the flow speed is adjusted. The baffle and the drive shaft form a reduction gear structure with a smaller drive torque than the valve stem drive. The fitting gear between the driving shaft and the baffle plate is arranged near the center line of the baffle plate, and the baffle plate only receives thrust in the moving direction, compared with the driving of the valve rod, the fitting gear is not affected by torsion, so that the movement is more stable, and the high-precision flow speed adjustment can be realized.
The invention provides a low-noise electrode structure of an electromagnetic flow sensor and an electrode sealing method. According to the invention, the left wall and the right wall of the measuring cavity are respectively provided with the electrodes, the measuring cavity wall adopts insulating plastic, the electrodes adopt conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by adopting a secondary injection molding process. The secondary injection molding is a common process for producing plastic parts, two types of plastics which are easy to combine are selected, and the tight combination of the two types of plastics can be ensured through the secondary injection molding. The water tightness of the electrode can be directly provided by adopting secondary injection molding so as to collect the potential signal of the electrode. The contact surfaces of the first electrode and the second electrode and the fluid medium extend to the top and the bottom of the measuring cavity, are bilaterally symmetrical, and have larger contact area, so that noise on the electrodes is reduced. Because the conductivity of the conductive plastic is lower, the electrode with larger contact area can ensure that the electrode made of the conductive plastic material has good low-noise characteristic.
The invention provides a high-precision flow velocity adjusting method for synchronously collecting flow velocity. The fixed measuring cavity is arranged in the cavity of the valve body, and an electrode of an electromagnetic flow sensor is arranged in the cavity and is used for measuring the speed of fluid. Meanwhile, a movable first baffle and a movable second baffle are respectively arranged between the measuring cavity and the shell, so that the flow speed is adjusted. Because the invention has little influence on manifold and magnetic field during flow rate adjustment, high-precision flow measurement can be realized, the invention also provides a method for realizing high-precision adjustment of flow rate by taking high-precision synchronous flow rate sampling as a feedback signal during flow rate adjustment.
The invention provides a method for improving the precision of micro flow control by arranging V-shaped or W-shaped grooves in the vertical direction. According to the invention, the V-shaped or W-shaped curve openings which are perpendicular to each other and are meshed with each other are arranged on the opposite end surfaces of the first baffle plate and the second baffle plate, when the end surfaces of the first baffle plate and the second baffle plate are close, the flow area change rate of the flow channel is reduced due to the existence of the openings, so that the valve has higher sensitivity under the same moving speed of the baffle plates.
Compared with the prior art, the invention has the following advantages:
1) When the baffle moves to adjust the flow speed, the measuring cavity is fixed with the electrode, the flow channel at the inlet of the measuring cavity is fixed, manifold change can not be generated, the outlet of the measuring cavity is in symmetrical taper indentation design, the influence of the manifold change on the measuring precision is negligible, and high-precision flow measurement can be realized.
2) When the baffle moves to adjust the flow speed, the measuring cavity is fixed with the electrode, the magnetic field distribution in the measuring cavity is not changed, and high-precision flow measurement can be realized;
3) The baffle and the driving shaft form a speed reduction gear structure, compared with valve rod driving, the speed reduction gear structure has smaller driving moment, the baffle can only receive the thrust in the moving direction, the movement is more stable, and the high-precision valve adjustment can be realized;
4) The electrode is made of conductive plastic, so that the contact area is large, the measuring cavity is sealed by secondary injection molding, the signal noise of the electrode is low, and the sealing process is simple;
5) High-precision adjustment of the flow rate is realized by high-precision synchronous flow rate sampling as a feedback signal in flow adjustment.
6) The V-shaped or W-shaped groove arranged in the vertical direction improves the adjustment precision under the condition of small opening.
Of course, any one of the technical solutions of the present invention does not necessarily achieve all of the above beneficial effects.
Drawings
FIG. 1 is a cross-sectional view of a first embodiment of an integrated flow measurement and adjustment device that forms a split structure of the present invention.
In the figure, a housing 1, a measurement chamber left wall 2a, a measurement chamber right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first drive shaft 5a, a second drive shaft 5b, a first elastic body 8a, a second elastic body 8b, a flow passage inlet 10, a flow passage outlet 11, a first curve 12a, a second curve 12b, a first stopper 13a, a second stopper 13b, a first U-shaped groove 14a, a second U-shaped groove 14b, and an insulating spacer 16.
FIG. 2 is a cross-sectional view of a second embodiment of an integrated flow measurement and adjustment device that forms a split structure of the present invention.
In the figure, a housing 1, a measurement chamber left wall 2a, a measurement chamber right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first drive shaft 5a, a second drive shaft 5b, a sealing gasket 6, a sealing bracket 7, a flow passage inlet 10, a flow passage outlet 11, a first stopper 13a, a second stopper 13b, a sealing ring 15, and an insulating gasket 16.
FIG. 3 is a cross-sectional view of a third embodiment of an integrated flow measurement and adjustment device that forms a split structure of the present invention.
In the figure, a housing 1, a measurement chamber left wall 2a, a measurement chamber right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first drive shaft 5a, a second drive shaft 5b, a first elastic body 8a, a second elastic body 8b, a first pulley 9a, a second pulley 9b, a flow passage inlet 10, a flow passage outlet 11, a first stopper 13a, a second stopper 13b, and an insulating spacer 16.
FIG. 4 is a cross-sectional view of a fourth embodiment of an integrated flow measurement and adjustment device that forms a split structure of the present invention.
In the figure, a housing 1, a measurement chamber left wall 2a, a measurement chamber right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a flow channel inlet 10, a flow channel outlet 11, and an insulating spacer 16.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to FIG. 1, a cross-sectional view of a first embodiment of an integrated flow measurement and adjustment device of the split construction of the present invention is shown.
The embodiment comprises a housing 1, a measuring cavity left wall 2a, a measuring cavity right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first driving shaft 5a, a second driving shaft 5b, a first elastic body 8a, a second elastic body 8b, a runner inlet 10, a runner outlet 11, a first curve 12a, a second curve 12b, a first stop 13a, a second stop 13b, a first U-shaped groove 14a, a second U-shaped groove 14b, and an insulating spacer 16.
Inside the housing 1, a cylindrical cavity is formed, which connects the flow channel inlet 10 and the flow channel outlet 11, wherein the fluid medium sequentially passes through the flow channel inlet 10, the cylindrical cavity and the flow channel outlet 11, and the sections of the flow channel inlet 10 and the flow channel outlet 11 are round-corner rectangles. The measuring cavity wall, the electrode, the baffle plate, the driving shaft and the like in the cylindrical cavity are symmetrically arranged left and right according to the central axis of the flow channel. The measuring cavity left wall 2a is located on the left side of the cylindrical cavity, the measuring cavity right wall 2b is located on the right side of the cylindrical cavity, and a measuring cavity with a round-corner rectangular cross section is formed in the space between the measuring cavity left wall 2a and the measuring cavity right wall 2b and is used for measuring the flow of the fluid medium. The runner inlet 10, the measuring cavity and the runner outlet 11 are sequentially and smoothly butted, so that the manifold of the fluid medium is kept stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring cavity, the second electrode 3b is vertically arranged on the right wall 2b of the measuring cavity, the contact surface of the electrode and the fluid medium is rectangular in the vertical direction, and a larger contact area is formed, so that noise caused by the impact of the fluid medium is reduced. The first electrode 3a and the second electrode 3b are injection molded by conductive plastic, and the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity are injection molded by insulating plastic and the electrodes for the second time, so that the electrodes are tightly combined with the walls of the measuring cavity to avoid water seepage. The housing 1 is made of a conductive material such as stainless steel, conductive plastic, etc. to realize electromagnetic shielding. The insulating spacer 16 is arranged at the bottom of the measuring cavity in the embodiment to prevent the electrode induced potential from being attenuated, and the insulating spacer 16 is integrated with the measuring cavity wall, so that the manufacturing process can be simplified.
A circular arc-shaped first baffle 4a is arranged between the shell 1 and the left wall 2a of the measuring cavity, a first driving shaft 5a is arranged at the same time, and the outer cambered surface of the first baffle 4a is consistent with the inner cambered surface of the cylindrical cavity of the shell 1 and moves along an arc line. An inner gear is provided in a partial region of the inner arc surface of the first barrier 4a, and fitted with an outer gear of the first drive shaft 5 a. The first U-shaped groove 14a is provided in the outer arc surface partial area of the first shutter 4a, and at the same time, a first stopper 13a is provided at a corresponding position of the first U-shaped groove 14a in the cylindrical cavity of the housing 1 for restricting the moving position of the first shutter 4 a. A circular arc-shaped second baffle 4b is arranged between the shell 1 and the right wall 2b of the measuring cavity, a second driving shaft 5b is arranged at the same time, and the outer arc surface of the second baffle 4b is consistent with the inner arc surface of the cylindrical cavity of the shell 1 and moves along an arc line. An inner gear is provided in a partial region of the inner arc surface of the second barrier 4b, and fitted with an outer gear of the second drive shaft 5 b. The second U-shaped groove 14b is provided in the outer arc surface partial area of the second shutter 4b, and a second stop 13b is provided at a corresponding position of the second U-shaped groove 14b in the cylindrical cavity of the housing 1 for restricting the movement position of the second shutter 4 b. The central axis of the flow channel is taken as a symmetry axis, the first baffle 4a and the second baffle 4b are symmetrically arranged, the first driving shaft 5a and the second driving shaft 5b are symmetrically arranged, the modulus of the gears is consistent, when the first driving shaft 5a and the second driving shaft 5b rotate at the same rotating speed in opposite directions, the first baffle 4a and the second baffle 4b are driven to move, and the symmetrical state of the first baffle 4a and the second baffle 4b is kept, so that the influence of manifold change on flow measurement is minimized when the baffles move. When the first baffle 4a and the second baffle 4b move towards the direction of the flow channel outlet 11 to be contacted with each other, the valve is in a closed state, and when the first baffle 4a and the second baffle 4b move towards the direction of the flow channel inlet 10 to be level with the measuring cavity, the valve is in an open state.
The first baffle 4a is provided with a first elastic body 8a close to the outer arc surface and the end surface of the flow channel outlet 11, the cross section of the end surface is provided with a W-shaped first curve 12a, the second baffle 4b is provided with a second elastic body 8b close to the outer arc surface and the end surface of the flow channel outlet 11, the cross section of the end surface is provided with a W-shaped second curve 12b, and the first curve 12a and the second curve 12b are complementary curves so as to ensure that when the valve is closed, the first baffle 4a and the second baffle 4b are sealed. The first and second elastic bodies 8a and 8b are made of thermoplastic elastomer material and are compounded to the baffle plate by a two-shot molding process. When the valve is in a closed state, the end surfaces of the first baffle plate 4a and the second baffle plate 4b are in contact, and the outer side surface is in contact with the inner wall of the cavity of the housing 1, so that the flow passage outlet 11 is covered and sealed, and the flow passage is cut off. Since the inlet pressure of the flow channel is higher than the outlet pressure, additional pressure of the baffle to the housing can be provided, thereby achieving better tightness. Because the first curve 12a and the second curve 12b are complementary W-shaped curves, when the baffle moves to be close to the joint, the flow passage presents gradually reduced S-shaped, similar to the flow characteristic of an equal-percentage regulating valve, so that the sensitivity of valve adjustment is improved. The W-shaped curve can be designed into different curve shapes according to the required flow adjustment characteristic requirement.
The first driving shaft 5a and the second driving shaft 5b are driven by a stepping motor or a reducing motor and work in a low-speed running state, so that interference of manifold change on measurement when the first baffle 4a and the second baffle 4b move is reduced, and high-precision measurement of flow can still be realized when the baffles move. The flow rate of the fluid is measured simultaneously as the first barrier 4a and the second barrier 4b are moved, as feedback signals for the rotational speed adjustment of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high accuracy. The first shutter 4a and the second shutter 4b shown in fig. 1 are positions where the valve is at a certain opening degree, and are only one example of the valve positions.
Referring to fig. 2, a cross-sectional view of a second embodiment of an integrated flow measurement and adjustment device of the split construction of the present invention is shown.
The embodiment comprises a shell 1, a measuring cavity left wall 2a, a measuring cavity right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first driving shaft 5a, a second driving shaft 5b, a sealing gasket 6, a sealing bracket 7, a runner inlet 10, a runner outlet 11, a first stop 13a, a second stop 13b, a sealing ring 15 and an insulating gasket 16.
Inside the housing 1, an approximately cylindrical cavity is formed, which connects the flow channel inlet 10 and the flow channel outlet 11, wherein the fluid medium sequentially passes through the flow channel inlet 10, the cavity, and the flow channel outlet 11, and the cross sections of the flow channel inlet 10 and the flow channel outlet 11 are rectangular. The measuring cavity wall, the electrode, the baffle plate, the driving shaft and the like in the cavity are symmetrically arranged left and right according to the central axis of the flow channel. The left wall 2a of the measuring cavity is positioned on one side of the cavity, the right wall 2b of the measuring cavity is positioned on the other side of the cavity, and the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity form a measuring cavity with a rectangular cross section for measuring the flow of the fluid medium. The runner inlet 10, the measuring cavity and the runner outlet 11 are sequentially and smoothly butted, so that the manifold of the fluid medium is kept stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring cavity, the second electrode 3b is vertically arranged on the right wall 2b of the measuring cavity, and the contact surfaces of the first electrode 3a and the second electrode 3b with the fluid medium are rectangular in the vertical direction, so that the contact area is large, and the electrode noise is reduced. The measuring chamber left wall 2a and the measuring chamber right wall 2b are manufactured from an insulating plastic material and the first electrode 3a and the second electrode 3b are manufactured from metal. The housing 1 is made of metal, such as stainless steel, and the bottom of the measuring chamber of the present embodiment is provided with an insulating spacer 16 to prevent the induced potential of the electrode from being attenuated.
A circular arc-shaped first baffle 4a is arranged between the housing 1 and the measuring chamber left wall 2a, while a first drive shaft 5a is arranged. An inner gear is arranged on the inner cambered surface of the first baffle plate 4a and is fit with an outer gear of the first driving shaft 5a. A second baffle 4b of circular arc shape is arranged between the housing 1 and the right wall 2b of the measuring chamber, while a second drive shaft 5b is arranged. An inner gear is arranged on the inner cambered surface of the second baffle 4b and is fit with an outer gear of the second driving shaft 5b. The first baffle 4a and the second baffle 4b are symmetrically arranged and can move towards the center of the flow channel under the drive of the driving shaft, so that the valve is opened and closed. The first drive shaft 5a and the second drive shaft 5b rotate at the same rotational speed in opposite directions to ensure symmetrical movement of the first baffle 4a and the second baffle 4b so that the influence of manifold changes on the flow measurement is minimized. The measuring chamber left wall 2a comprises a first stop 13a near the flow channel inlet 10 for limiting the movement position of the first baffle 4a, and the measuring chamber right wall 2b comprises a second stop 13b near the flow channel inlet 10 for limiting the movement position of the second baffle 4 b.
The runner outlet 11 of the housing 1 is provided with an annular sealing gasket 6 with a middle upright post and a sealing support 7, and the sealing support 7 is made of a material with higher rigidity so as to provide support for the sealing gasket 6. The gasket 6 is made of thermoplastic elastomer material and is compounded onto the sealing bracket 7 by injection molding process to form a rigid-flexible compound sealing element. The outer sides of the first 4a and second 4b baffles are in contact with the sealing gasket 6, and by virtue of the elastic properties of the material of the sealing gasket 6, a seal between the first 4a and second 4b baffles and the housing 1, and a seal between the first 4a and second 4b baffles and the left 2a and right 2b walls of the measurement chamber is provided. When the first baffle plate 4a and the second baffle plate 4b are close to the center of the flow channel, the first baffle plate 4a and the second baffle plate 4b are attached to the middle upright post of the annular sealing gasket 6, and meanwhile, the first baffle plate 4a and the second baffle plate 4b are further pressed towards the annular sealing gasket 6 by utilizing the characteristic that the inlet pressure of a fluid medium is larger than the outlet pressure, so that the valve is completely closed. The flow channel inlet 10 of the housing 1 is provided with an annular sealing ring 15, which provides a seal between the housing 1 and the measuring chamber wall to prevent the fluid medium from forming a flow channel outside the measuring chamber, affecting the flow measurement accuracy. Meanwhile, by means of the sealing gasket 6 and the sealing ring 15, sealing of the rotating space of the first driving shaft 5a and the second driving shaft 5b is provided, foreign matters are prevented from entering the rotating space, and reliability of valve movement is improved.
The first driving shaft 5a and the second driving shaft 5b are operated in a low-speed running state by adopting a stepping motor or a decelerating motor so as to reduce the disturbance of manifold shape on measurement when the first baffle 4a and the second baffle 4b move, so that the flow can be measured with high precision. The flow rate of the fluid is measured simultaneously as the first barrier 4a and the second barrier 4b are moved, as feedback signals for the rotational speed adjustment of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high accuracy. The first shutter 4a and the second shutter 4b shown in fig. 2 are positions where the valve is at a certain opening degree, and are only one example of the valve positions.
Referring to fig. 3, a cross-sectional view of a third embodiment of an integrated flow measurement and adjustment device of the split construction of the present invention is shown.
The embodiment comprises a housing 1, a measuring cavity left wall 2a, a measuring cavity right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first driving shaft 5a, a second driving shaft 5b, a first elastic body 8a, a second elastic body 8b, a first pulley 9a, a second pulley 9b, a flow channel inlet 10, a flow channel outlet 11, a first stop 13a, a second stop 13b, and an insulating spacer 16.
Inside the housing 1, a cylindrical cavity is formed, which connects the flow channel inlet 10 and the flow channel outlet 11, wherein the fluid medium sequentially passes through the flow channel inlet 10, the cylindrical cavity and the flow channel outlet 11, and the sections of the flow channel inlet 10 and the flow channel outlet 11 are round-corner rectangles. The measuring cavity wall, the electrode, the baffle, the driving shaft, the pulley and the like in the cylindrical cavity are all symmetrically arranged left and right according to the central axis of the flow channel. The measuring cavity left wall 2a is located on the left side of the cylindrical cavity, the measuring cavity right wall 2b is located on the right side of the cylindrical cavity, and a measuring cavity with a round-corner rectangular cross section is formed in the space between the measuring cavity left wall 2a and the measuring cavity right wall 2b and is used for measuring the flow of the fluid medium. The runner inlet 10, the measuring cavity and the runner outlet 11 are sequentially and smoothly butted, so that the manifold of the fluid medium is kept stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring cavity, the second electrode 3b is vertically arranged on the right wall 2b of the measuring cavity and is symmetrically arranged, and the contact surfaces of the first electrode 3a and the second electrode 3b with the fluid medium are rectangular in the vertical direction, so that the contact area is large, and electrode noise caused by fluid impact is reduced. The wall of the measuring cavity is made of insulating plastic, the first electrode 3a and the second electrode 3b are made of conductive plastic, the insulating plastic and the conductive plastic of the embodiment use the same base material, and the insulating plastic and the conductive plastic are made of a secondary injection molding process, so that the tightness between the insulating plastic and the conductive plastic is ensured, and the transmission of electrode signals is convenient. The secondary injection molding is a common injection molding process, and in this embodiment, the electrode part is first formed by using a conventional injection molding process, and then the electrode part is used as an insert for the secondary injection molding to form the entire measuring cavity. The same base material is adopted, so that the bonding degree of the two parts is increased. In this embodiment, in order to reduce interference of external electromagnetic signals to electrode signals and simplify manufacturing process, the housing 1 is made of conductive plastic. The insulating spacer 16 is arranged at the bottom of the measuring cavity in the embodiment to prevent the electrode induced potential from being attenuated, and the insulating spacer 16 is integrated with the measuring cavity wall, so that the manufacturing process can be simplified.
A circular arc-shaped first baffle 4a is arranged between the shell 1 and the left wall 2a of the measuring cavity, a first driving shaft 5a is arranged at the outer side of the first baffle 4a, and a first pulley 9a is arranged at the inner side of the first baffle. The outer arc surface of the first baffle plate 4a is provided with a first elastic body 8a near the runner outlet 11, an external gear is arranged near the runner inlet 10, the external gear is fitted with the gear of the first driving shaft 5a, a second baffle plate 4b in the shape of an arc is arranged between the shell 1 and the right wall 2b of the measuring cavity, meanwhile, the outer side of the second baffle plate 4b is provided with a second driving shaft 5b, the inner side of the second baffle plate is provided with a second pulley 9b, the outer arc surface of the second baffle plate 4b is provided with a second elastic body 8b near the runner outlet 11, an external gear is arranged near the runner inlet 10, and the external gear is fitted with the gear of the second driving shaft 5 b. The outer arcs of the first baffle 4a and the second baffle 4b are consistent with the arc of the cylindrical cavity of the shell 1, and can move along the arc. The two sides of the housing 1 near the runner inlet 10 are respectively provided with a convex limiting block, a first limiting block 13a and a second limiting block 13b, which are used for limiting the movement of the first baffle plate 4a and the second baffle plate 4 b. The first baffle 4a and the second baffle 4b are symmetrically arranged and can symmetrically move under the drive of the driving shaft, so that the valve is opened and closed. The modulus of the first drive shaft 5a and the modulus of the second drive shaft 5b are the same, and when the shafts are rotated at the same rotational speed in opposite directions, symmetrical movement of the first baffle 4a and the second baffle 4b can be ensured so that the influence of manifold changes on flow measurement is minimized. In order to ensure that the first shutter 4a and the second shutter 4b move in an arc and to ensure a stable fit of the first drive shaft 5a and the second drive shaft 5b, the present embodiment provides a first pulley 9a and a second pulley 9b for limiting the movement of the first shutter 4a and the second shutter 4 b. The first pulley 9a and the second pulley 9b can be rotated to reduce friction when the shutter moves.
The first and second elastic bodies 8a and 8b are made of thermoplastic elastomer materials and are respectively compounded on the first and second baffle plates 4a and 4b by injection molding process to form a rigid-flexible composite sealing element. The first and second elastic bodies 8a and 8b are in contact with the housing 1, and provide sealing of the first and second barrier plates 4a and 4b to the housing 1, and sealing between the first and second barrier plates 4a and 4b, depending on the elastic properties of the material.
The first driving shaft 5a and the second driving shaft 5b are operated in a low-speed running state by adopting a stepping motor or a decelerating motor so as to reduce the disturbance of manifold shape on measurement when the first baffle 4a and the second baffle 4b move, so that the flow can be measured with high precision. The flow rate of the fluid is measured simultaneously as the first barrier 4a and the second barrier 4b are moved, as feedback signals for the rotational speed adjustment of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high accuracy. The first shutter 4a and the second shutter 4b shown in fig. 3 are positions where the valve is at a certain opening degree, and are only one example of the valve positions.
Referring to fig. 4, a cross-sectional view of a fourth embodiment of an integrated flow measurement and adjustment device of the split construction of the present invention is shown.
The embodiment comprises a housing 1, a measuring cavity left wall 2a, a measuring cavity right wall 2b, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a flow channel inlet 10, a flow channel outlet 11 and an insulating gasket 16.
Inside the housing 1, an approximately cubic cavity is formed, which connects the flow channel inlet 10 and the flow channel outlet 11, wherein the fluid medium sequentially passes through the flow channel inlet 10, the cavity and the flow channel outlet 11, and the cross sections of the flow channel inlet 10 and the flow channel outlet 11 are round-corner rectangles. The measuring cavity wall, the electrode, the baffle plate and the like in the cavity are symmetrically arranged left and right according to the central axis of the flow channel. The measuring cavity left wall 2a is located on the left side of the cavity, the measuring cavity right wall 2b is located on the right side of the cavity, and a space between the measuring cavity left wall 2a and the measuring cavity right wall 2b forms a measuring cavity with a round-corner rectangular cross section and is used for measuring the flow of the fluid medium. The runner inlet 10, the measuring cavity and the runner outlet 11 are sequentially and smoothly butted, so that the manifold of the fluid medium is kept stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring cavity, the second electrode 3b is vertically arranged on the right wall 2b of the measuring cavity, the contact surface of the electrode and the fluid medium is rectangular in the vertical direction, and a larger contact area is formed, so that noise caused by the impact of the fluid medium is reduced. The first electrode 3a and the second electrode 3b are formed by injection molding of conductive plastics, the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity are made of insulating plastics, and the electrodes are subjected to secondary injection molding, so that the electrodes are tightly combined with the walls of the measuring cavity, and the electrode position is prevented from being seeped outwards. The housing 1 is made of a conductive material such as stainless steel, conductive plastic, etc. to realize electromagnetic shielding. The insulating spacer 16 is arranged at the bottom of the measuring cavity in the embodiment to prevent the electrode induced potential from being attenuated, and the insulating spacer 16 is integrated with the measuring cavity wall, so that the manufacturing process can be simplified.
The left side of the flow channel outlet 11 of the shell 1 is provided with a first baffle plate 4a, and one end of the first baffle plate 4a, which is close to the left wall 2a of the measuring cavity, can rotate so as to drive the other end to move. The right side of the runner outlet 11 of the housing 1 is provided with a second baffle 4b, and one end of the second baffle 4b, which is close to the right wall 2b of the measuring cavity, can rotate, so that the other end is driven to move. The first baffle 4a and the second baffle 4b are symmetrically arranged, and can move towards the center of the flow channel during rotation, so that the valve is opened and closed. If the moving speeds of the first baffle 4a and the second baffle 4b are the same, the symmetrical state of the baffles can be kept, so that the influence of manifold change on flow measurement during valve opening and closing is minimized.
The first baffle 4a and the second baffle 4b are operated in a low-speed running state by adopting a stepping motor or a decelerating motor, so that the disturbance of manifold shape on measurement when the first baffle 4a and the second baffle 4b move is reduced, and the flow can be measured with high precision. The flow rate of the fluid is measured simultaneously as the first shutter 4a and the second shutter 4b are moved, as a feedback signal for the rotational speed adjustment, so that the flow rate can be adjusted with high accuracy. The first shutter 4a and the second shutter 4b shown in fig. 4 are positions where the valve is at a certain opening degree, and are only one example of the valve positions.
The integrated flow measuring and adjusting device with the split structure is characterized in that the inner cavity of the shell is a cylinder or a cylinder approximately, the baffle plate is in a circular arc shape consistent with or approximately similar to the cambered surface of the cylinder, so that the size of the valve body is reduced, and the integrated flow measuring and adjusting device is only in an optimized arrangement mode. The inner cavity of the shell of the embodiment is approximately cubic, and the baffle plate adopts a wedge shape, so that the influence of manifold change can be further reduced although the volume of the valve is increased, and the valve is another optimal arrangement mode. The use of an arc that approximates a straight line is also a method for reducing manifold effects and volume without affecting the characteristics of the device, and such conditions are well known to those skilled in the art and are within the scope of the present invention.
The integrated flow measuring and regulating device with split structure in this embodiment has cylindrical, cylindrical and cubic casing, and may be conical and cubic conic to facilitate sealing and assembling, and this change in shape does not affect the characteristics of the device and is well known to those skilled in the art.
In order to ensure the movement of the baffle, the integrated flow measuring and adjusting device with a split structure of the embodiment is provided with a pulley mechanism, and also can be further provided with limit mechanisms such as a guide rail, a sliding block and the like, wherein the arrangement of the limit mechanisms does not affect the essential performance of the device, and the integrated flow measuring and adjusting device is a technology well known to a person skilled in the art, and the situation is also within the protection scope of the invention.
The integrated flow measuring and adjusting device with the split structure adopts a gear fitting mode to drive the baffle to move, can also adopt other driving modes such as a push rod, a connecting rod, a rocker arm and the like, and the arrangement of the mechanisms does not influence the substantial performance of the device, is a technology well known to the person skilled in the art, and is also in the protection scope of the invention.
In the integrated flow measuring and adjusting device with the split structure, one end of the baffle moves along an arc line towards the central axis of the flow channel, and the other end also moves or rotates along the same arc line. The movement of the baffle may be designed to move along other paths toward the central axis of the flow channel and the baffle may move along different paths at one end and the other end, the arrangement of these mechanisms not affecting the flow measurement and regulation characteristics of the device, and such is well known to those skilled in the art and is within the scope of the present invention.
The integrated flow measuring and adjusting device with the split structure in the embodiment adopts symmetrical arrangement in the cavity, only aims at achieving optimal flow measuring precision, can also adopt asymmetrical arrangement, can also meet the flow measuring requirement of certain precision, has certain influence on the flow measuring precision only by the design of the asymmetrical flow channel, does not influence the capacity of the device for improving the flow measuring precision, and is a technology well known to a person skilled in the art, and the situation is also within the protection scope of the invention.
The integrated flow measuring and adjusting device with the split structure can be manufactured by adopting a metal material or conductive plastic as an electrode, or can be manufactured by adopting a mode of compounding the metal and the conductive plastic, namely, a contact part of a fluid medium is made of the metal material so as to reduce electrode noise, and an electrode signal is led out by adopting the conductive plastic so as to realize the sealing of the electrode.
In the integrated flow measuring and adjusting device with the split structure, the end face contacted by the baffle adopts a W-shaped curve, and can also adopt other types of curves to realize various flow adjusting characteristics.
The integrated flow measuring and adjusting device with split structure of the present embodiment does not include the exciting device, and the exciting device can be a general technology disclosed at present, which does not affect the characteristics of the device, and is a technology known to those skilled in the art, and such a situation is also within the protection scope of the present invention.
The integrated flow measuring and adjusting device with split structure of the embodiment does not comprise the electrode signal leading-out part technology, the related electrode signal leading-out can adopt the currently disclosed general technology, the characteristics of the device are not affected, the technology is well known to the person skilled in the art, and the situation is also within the protection scope of the invention.
The integrated flow measuring and adjusting device with a split structure of the present embodiment does not include a structure of the upper cover portion of the measuring chamber, and the mechanism related to the upper cover portion of the measuring chamber can adopt the presently disclosed general technology, which does not affect the characteristics of the device, and is a technology known to those skilled in the art, and such a situation is also within the protection scope of the present invention.
The integrated flow measuring and adjusting device with split structure of the present embodiment does not include the technology of the baffle motor driving mechanism, and the related baffle motor driving mechanism can adopt the presently disclosed general technology, and does not affect the characteristics of the device, and is a technology well known to those skilled in the art, and such a situation is also within the protection scope of the present invention.
In the integrated flow measuring and adjusting device with the split structure, the baffle plate moves or rotates in the horizontal direction, and the baffle plate can also move or rotate in the vertical direction, so that the baffle plate is mirrored and/or rotated by any angle, but only one arrangement mode of the baffle plate, and the optimal baffle plate arrangement can be selected according to different excitation modes, so that the essential characteristics of the device are not affected, and the situation is within the protection scope of the invention.
The integrated flow measuring and adjusting device with split structure in the embodiment forms the combined baffle plate by combining more baffles, sealing parts, driving parts and the like, but the change of the simple combination form does not affect the essential characteristics of the device, and is a technology well known to the person skilled in the art, and the situation is also within the protection scope of the invention.
The present embodiment of an integrated flow measurement and adjustment device with split structure mirrors and/or rotates the device by any angle without affecting the characteristics of the device, which is well known to those skilled in the art, and such a situation is also within the protection scope of the present invention.
The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.

Claims (15)

1. An integrated flow measuring and regulating device with a split structure is characterized by comprising a shell (1), a measuring cavity left wall (2 a), a measuring cavity right wall (2 b), a first electrode (3 a), a second electrode (3 b), a first baffle plate (4 a), a second baffle plate (4 b), a flow channel inlet (10) and a flow channel outlet (11), wherein the shell (1) forms a cavity for connecting the flow channel inlet (10) and the flow channel outlet (11), the measuring cavity left wall (2 a) is positioned and fixed on one side of the cavity, the measuring cavity right wall (2 b) is positioned and fixed on the other side of the cavity, a space between the measuring cavity left wall (2 a) and the measuring cavity right wall (2 b) forms a measuring cavity, the measuring cavity is connected with the flow channel inlet (10) and the flow channel outlet (11) of the shell (1) so as to form a flow channel through which a fluid medium passes, the measuring cavity left wall (2 a) is provided with the first electrode (3 a), the measuring cavity right wall (2 b) is provided with the second electrode (3 b), the first electrode (3 a) and the second electrode (3 b) are arranged in the measuring cavity, the first electrode (3 a) and the second electrode (3 b) are contacted with the measuring cavity in the measuring cavity, the first baffle plate (4) is arranged on one side of the other side of the cavity, the second baffle plate (4) is arranged close to the flow channel (11) and can be moved, the second baffle plate (4) is arranged on one side close to the flow channel material is arranged to the flow channel outlet (11), including metal or conductive plastic;
The left wall (2 a) and the right wall (2 b) of the measuring cavity are made of insulating plastics, the first electrode (3 a) and the second electrode (3 b) are made of conductive plastics, and the insulating plastics and the conductive plastics are tightly combined by adopting a secondary injection molding process.
2. The integrated flow measuring and adjusting device with the split structure according to claim 1, wherein the left wall (2 a) and the right wall (2 b) of the measuring cavity, the first electrode (3 a) and the second electrode (3 b), the first baffle (4 a) and the second baffle (4 b) are symmetrically distributed according to the central axis of the flow channel, so that the flow can be measured with high precision.
3. An integrated flow measuring and regulating device of a split construction according to claim 1, wherein one end of the first baffle (4 a) and the second baffle (4 b) are movable toward the central axis of the flow passage and the other end is movable, thereby regulating the flow area of the flow passage.
4. The integrated flow measuring and regulating device of a split structure according to claim 1, wherein the movement trajectories of the first baffle (4 a) and the second baffle (4 b) are symmetrical circular arcs.
5. An integrated flow measuring and regulating device of a split construction according to claim 1, characterized in that a first drive shaft (5 a) and a second drive shaft (5 b) are arranged between the measuring chamber and the housing (1), the first drive shaft (5 a) pushing the first baffle (4 a) to move when rotating and the second drive shaft (5 b) pushing the second baffle (4 b) to move when rotating.
6. An integrated flow measuring and regulating device of a split construction according to claim 5, characterized in that the first drive shaft (5 a) and the first baffle (4 a) are provided with intermeshing gears and the second drive shaft (5 b) and the second baffle (4 b) are provided with intermeshing gears.
7. An integrated flow measuring and regulating device of a split construction according to claim 1, characterized in that the flow channel outlet (11) of the housing (1) is provided with an annular sealing gasket (6), the contact surfaces of the sealing gasket (6) with the first baffle (4 a) and the second baffle (4 b) being arranged with an elastic sealing material comprising a thermoplastic elastomer for enhancing the tightness of the first baffle (4 a) and the second baffle (4 b) with respect to the housing (1).
8. An integrated flow measuring and regulating device of split construction according to claim 1 or 7, characterized in that the middle part of the flow channel outlet (11) of the housing (1) is further provided with a vertical upright (7), the contact surface of the upright (7) with the first baffle (4 a) and the second baffle (4 b) is provided with an elastic sealing material to enhance the tightness between the first baffle (4 a) and the second baffle (4 b).
9. An integrated flow measuring and regulating device of a split structure according to claim 1, characterized in that the first baffle (4 a) is provided with a first elastic body (8 a) on one side surface close to the flow passage outlet (11), the second baffle (4 b) is provided with a second elastic body (8 b) on one side surface close to the flow passage outlet (11), and the first elastic body (8 a) and the second elastic body (8 b) are made of elastic sealing materials so as to facilitate sealing after the baffles are closed.
10. The integrated flow measuring and regulating device with the split structure according to claim 9, wherein the first elastic body (8 a) is attached to the surface of the first baffle plate (4 a) by adopting a secondary injection molding process, and the second elastic body (8 b) is attached to the surface of the second baffle plate (4 b) by adopting a secondary injection molding process.
11. An integrated flow measuring and regulating device of a split structure according to claim 1, characterized in that the end surfaces of the first baffle plate (4 a) and the second baffle plate (4 b) which are in contact with each other are provided with a first curve (12 a) and a second curve (12 b) of a W-shaped or V-shaped characteristic in cross section, forming a V-shaped or W-shaped opening in the vertical direction, so as to facilitate the improvement of the flow regulating characteristic at a small opening degree.
12. The integrated flow measuring and adjusting device with the split structure according to claim 1, wherein a first protruding stop block (13 a) is arranged on one side surface of a cavity of the shell (1), a first U-shaped groove (14 a) is formed in the outer side of the first baffle plate (4 a), the first stop block (13 a) is located in the first U-shaped groove (14 a) and used for limiting when the first baffle plate (4 a) moves, a second protruding stop block (13 b) is arranged on the other side surface of the cavity of the shell (1), a second U-shaped groove (14 b) is formed in the outer side of the second baffle plate (4 b), and the second stop block (13 b) is located in the second U-shaped groove (14 b) and used for limiting when the second baffle plate (4 b) moves.
13. An integrated flow measuring and regulating device of a split construction according to claim 1, characterized in that the housing (1) has a cavity provided with a first protruding stop (13 a) on one side surface adjacent to the flow channel inlet (10) for limiting movement of the first baffle (4 a) and a second protruding stop (13 b) on the other side surface adjacent to the flow channel inlet (10) for limiting movement of the second baffle (4 b).
14. An integrated flow measuring and regulating device of a split construction according to claim 1, characterized in that the measuring chamber left wall (2 a) is provided with a protruding first stop (13 a) near the outside of the flow channel inlet (10) for limiting the movement of the first baffle (4 a), and the measuring chamber right wall (2 b) is provided with a protruding second stop (13 b) near the outside of the flow channel inlet (10) for limiting the movement of the second baffle (4 b).
15. The integrated flow measuring and regulating device of a split structure according to claim 1, wherein the contact surfaces of the first electrode (3 a) and the second electrode (3 b) with the fluid medium have a vertical height greater than a horizontal width to reduce electrode noise for facilitating high-precision measurement of flow.
CN202210348081.9A 2022-04-03 2022-04-03 Integrated flow measurement and regulation device with split structure Active CN114645969B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388834A (en) * 1981-03-31 1983-06-21 Fischer & Porter Company Electromagnetic flowmeter having a monolithic conduit
CN102927304A (en) * 2012-12-06 2013-02-13 银川东方运输设备有限公司 Linear pneumatic sliding valve
JP2014025522A (en) * 2012-07-26 2014-02-06 Cosmo Koki Co Ltd Pipe connection means
KR20170013728A (en) * 2015-07-28 2017-02-07 동아대학교 산학협력단 Shutter Slide Type Valve

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2749431C3 (en) * 1977-11-04 1982-02-11 Kubota Ltd., Osaka Rotary valve
CA1186672A (en) * 1981-11-23 1985-05-07 Frank J. Jandrasi Control valve for flow of solids
KR200402553Y1 (en) * 2005-09-15 2005-12-01 (주)코스모 Opening and closing valve for draining
DE102006045976B4 (en) * 2006-09-27 2013-01-31 Krohne Ag Flowmeter
CN102840356B (en) * 2012-08-23 2013-11-13 杭州云谷科技有限公司 Electromagnetic flow measurement and control integrated device
CN203963078U (en) * 2014-07-28 2014-11-26 铁岭大沃阀门(集团)有限公司 Opposite opened heavy caliber semispherical valve
CN110440047A (en) * 2019-08-15 2019-11-12 武汉格莱特控制阀有限公司 A kind of flow measurement control integrated electric valve
CN210978571U (en) * 2019-12-06 2020-07-10 李小燕 Opening and closing valve for flue gas desulfurization system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388834A (en) * 1981-03-31 1983-06-21 Fischer & Porter Company Electromagnetic flowmeter having a monolithic conduit
JP2014025522A (en) * 2012-07-26 2014-02-06 Cosmo Koki Co Ltd Pipe connection means
CN102927304A (en) * 2012-12-06 2013-02-13 银川东方运输设备有限公司 Linear pneumatic sliding valve
KR20170013728A (en) * 2015-07-28 2017-02-07 동아대학교 산학협력단 Shutter Slide Type Valve

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