CN114645969A - Integrated flow measuring and regulating device of split structure - Google Patents

Abstract

The invention discloses an integrated flow measurement and adjustment device with a split structure, comprising a casing, a left wall of a measuring cavity, a right wall of the measuring cavity, a first electrode, a second electrode, a first baffle, and a second baffle; the casing is formed with The cavity of the flow channel inlet and the flow channel outlet, the left wall of the measurement cavity is located on one side of the cavity and fixed, and the right wall of the measurement cavity is located on the other side of the cavity and fixed; the left wall of the measurement cavity and the right wall of the measurement cavity are fixed. A measurement cavity is formed in the space, and the measurement cavity is connected with the flow channel inlet and the flow channel outlet of the casing; the left wall of the measurement cavity is provided with a first electrode, and the right wall of the measurement cavity is provided with a second electrode; the flow channel outlet is provided with a movable first baffle and Second baffle. The application of the device is a balance heat meter, a heat supply measurement and control terminal, a household heat meter with a valve, and a balance valve with a flow measurement. When the flow rate of the present invention is adjusted, the baffle moves are symmetrically arranged to reduce the flow velocity measurement error in the adjustment process; the arrangement of the drive shaft realizes the low-torque drive of the valve baffle.

Description

Integrated flow measuring and regulating device with split structure

technical field

An integrated flow measurement and adjustment device with a split structure described in the present invention relates to the technical fields of electromagnetic flow sensors, control valves, accurate flow measurement, accurate flow control, quantitative control, integrated meter and valve, heat measurement, etc., in particular It involves precise measurement, heat metering, flow and heat balance of central heating systems and water system air conditioners, as well as urban water supply and drainage, agricultural irrigation, flow measurement and quantitative control in production processes. The invention is suitable for balance heat meter, heat metering device with built-in control valve, heat supply measurement and control terminal integrating flow sensor and control valve, electromagnetic flowmeter, water meter, balance valve, regulating valve, control valve and other products.

Background technique

Electromagnetic flowmeter is a flow measuring instrument based on Faraday's electromagnetic induction principle. It is proportional to the flow rate of the fluid, so as to obtain the flow rate of the fluid and the flow rate of the fluid. In order to generate a magnetic field, an excitation coil is installed around the measurement cavity, and the generated magnetic field passes through the fluid, thereby generating an induced potential in the fluid. Install electrodes at the positive and negative positions of the induced potential to measure the magnitude of the induced potential. Electromagnetic flowmeters are widely used in flow measurement, and have the advantages of high measurement accuracy, good linearity, no structural parts in the measurement cavity, and anti-pollution.

The control valve is a device used to control the fluid flow rate. According to the different structural forms, there are single-seat control valve, double-seat control valve, ball valve, half-ball valve, butterfly valve, gate valve, etc. The main components of the control valve include the valve core and the valve body. The valve core is located in the valve body and can rotate or move relative to the valve body, thereby realizing the adjustment of the opening degree of the control valve. In order to realize different flow control characteristic curves such as equal percentage and linearity, the valve core is designed into various curve shapes, such as V shape or W shape, to meet the requirements of different flow regulation. Corresponding to the horizontal rotation valve, the V-shaped or W-shaped through holes of the valve core are set in the horizontal direction.

The electromagnetic flowmeter and the control valve are combined together to become the control valve with built-in electromagnetic flow sensor, so as to realize the measurement and adjustment of the flow at the same time. In the prior art, a cylindrical valve core is arranged in the valve body, and the valve core is provided with a through hole, which is connected to the inlet and outlet of the valve body. Electrodes are arranged in the valve core for collecting the electric potential signal of the flow sensor. The rotation of the valve core can adjust the flow area of the flow passage of the control valve to achieve the purpose of flow rate adjustment.

The integrated device of electromagnetic flow sensor and valve in the prior art, patent ZL201210301767.9 "Electromagnetic flow measurement and control integrated device" discloses an arrangement structure, including a valve body, a valve core and a valve stem; the valve body includes The water inlet pipe, the cavity body, the water outlet pipe, the cavity body cover and the coil, the cavity body is located between the water inlet pipe and the water outlet pipe, the cavity body and the cavity body cover form a cavity with an open top, and the valve core is installed in the cavity; the valve core is set There is a through hole connecting the water inlet pipe and the water outlet pipe, the valve core includes a second magnetic core, a first electrode, a second electrode, and a lead wire; the second magnetic core is located above the valve core through hole, and the first electrode and the second electrode are symmetrically distributed On the inner walls of both sides of the through hole, the lead wire is in the shape of an inverted fork, the two ends of the fork head of the lead wire are respectively connected with the first electrode and the second electrode, and the fork rod of the lead wire extends from the valve stem; the valve stem is located on the top of the valve core and extends from the cavity The body and the cavity cover form a cavity with an open top and extend out, and a sealing ring is connected between the valve stem and the cavity cover. Patent ZL201210301750.3 "An Integrated Device for Flow Measurement and Control" discloses another arrangement structure, including a valve body, a valve core and a valve stem; the valve body includes a water inlet pipe, a cavity body, a water outlet pipe, and a cavity cover, The cavity is located between the water inlet pipe and the water outlet pipe, the cavity body and the cavity cover form a cavity with an open top, and the valve core is installed in the cavity; the valve core is provided with a through hole connecting the water inlet pipe and the water outlet pipe, and the valve core includes a coil , a first electrode, a second electrode, and a lead; the first electrode and the second electrode are symmetrically arranged at both ends of the through hole, the lead is in the shape of an inverted fork, and the two ends of the fork of the lead are respectively connected with the first electrode and the second electrode, and the lead The fork rod protrudes from the valve rod; the valve rod is located on the top of the valve core, and extends from the cavity and the cavity cover to form a cavity with an open top, and a sealing ring is arranged between the valve rod and the cavity cover. Patent ZL201310196992.5 "Valve and electromagnetic flowmeter integrated device and its application" discloses another arrangement structure, including valve core, magnetic conductive plate, first electrode, second electrode, first lead, second lead, circuit Plate, valve body, valve cover, coil, magnetic core, skeleton, U-shaped steel sleeve. The valve body and bonnet form a top and horizontally open cavity in which the valve core is located. The valve core includes a through hole connecting the horizontal opening of the cavity, and is divided into an upper through hole and a lower through hole by a magnetic conducting plate. The first electrode and the second electrode are located on the left and right sides of the lower through hole, respectively. A lead is connected to the circuit board, and the second electrode is connected to the circuit board through the second lead. The coil surrounds the magnetic core, is located below the valve core, and is placed in a U-shaped steel sleeve. The magnetic conducting plate, the magnetic core and the U-shaped steel sleeve are all magnetic conductors. In the invention, the sensor measured by the electromagnetic flowmeter is placed in the valve core, and the through hole of the valve core is divided into an upper through hole and a lower through hole by a magnetic conducting plate, the magnetic field is concentrated in the lower through hole, and the electrodes are arranged on two sides of the lower through hole. On the side, the coil is located under the spool, thus realizing the integration of the valve and the electromagnetic flowmeter. Patent ZL201910471279.4 "An Integrated Device of Electromagnetic Flow Sensor and Valve" discloses an arrangement structure, including valve core, valve body, coil, W-shaped steel sleeve, first magnetic conductive column and second magnetic conductive column; The valve body forms a cavity with the top and front and rear openings, and the valve core is located in the cavity and can be rotated horizontally; the valve core is provided with a horizontal through hole connecting the front and rear openings of the valve body; the valve core includes a U-shaped first electrode, a second The two electrodes are electrically connected to the printed circuit board through the first conductive plastic and the second conductive plastic; the coil is placed in the W-shaped cavity of the W-shaped steel sleeve, below the valve body, with a magnetic conductive plate in between; The magnetic conductive column and the second magnetic conductive column are respectively located on the left and right sides of the valve body, the lower part is respectively connected with the left and right sides of the W-shaped steel sleeve, and the upper part is connected with the left and right sides of the magnetic conductive cover above the valve body.

In the above prior art, the electrodes are all arranged in the valve core and are integrated with the valve core. When the valve core rotates, the electrode also rotates. The valve cores of the prior art are all cylindrical. When the valve core rotates at a certain angle, the valve core through hole and the flow channel inlet and flow channel outlet of the valve body are misaligned, forming an irregular S-shaped flow channel, resulting in the fluid medium. Therefore, in the prior art, it is necessary to correct the influence of the manifold under different spool positions. This correction cannot completely eliminate the influence of the manifold, resulting in the inability to achieve accurate measurement. .

In the control valve with built-in electromagnetic flow sensor in the prior art, the magnetic conductor cannot be evenly distributed along the circumference of the valve core. When the valve core rotates, the distributed magnetic field in the valve core through hole changes. The magnetic field strength is in a proportional relationship. The change of the magnetic field strength in the valve core through hole will cause the change of the electrode signal. Therefore, in the prior art, it is necessary to correct the measured flow rate according to the magnetic field strength at different valve core positions. Accurate, resulting in a certain uncertainty in the magnetic field strength in the through hole of the valve core, which affects the accurate measurement of the flow.

In the control valve with built-in electromagnetic flow sensor in the prior art, when the valve core is rotated and moved, there is friction between the valve core and the valve body, and a large torque is required to rotate the valve core. In the prior art, the rotational movement of the valve core is driven by the valve stem. When the diameter of the valve core is large, such as a large-diameter control valve, the torque is large, the valve stem needs to provide a large driving torque to drive the valve core, so that the flow rate is increased. The adjustment is not precise.

In the control valve with built-in electromagnetic flow sensor in the prior art, the electrode is made of metal material, the contact area between the electrode and the fluid medium is point-shaped, the contact area is small, the resistance is large, and the random noise is large, and the electrode surface needs to be passivated. It cannot be closely combined with the plastic material of the valve core, and additional waterproof sealing is required. For example, using conductive plastic for secondary injection sealing, the manufacturing process and assembly process are complicated.

In the control valve with a built-in electromagnetic flow sensor in the prior art, the electrodes are arranged in the valve core, which causes the flow field and the magnetic field to change when the valve core rotates, and cannot accurately measure the flow rate of the fluid medium. Therefore, the flow adjustment in the prior art cannot realize the simultaneous measurement of the flow rate when the valve core rotates, and adjust the movement of the valve core according to the measured flow rate. As a result, the flow adjustment accuracy of the prior art is poor, the adjustment speed is slow, the adjustment times are many, and the movements are frequent.

In the control valve with built-in electromagnetic flow sensor in the prior art, the flow regulation characteristic curve of the valve core is close to linear, and the sensitivity is low when the micro flow rate is adjusted, so that the high precision micro flow rate adjustment cannot be realized. The V-shaped or W-shaped opening of the valve core of the ordinary rotary structure valve is set in the horizontal direction, and the combination with the flow sensor will seriously affect the measurement accuracy of the flow rate, so it cannot be used together.

With the development of smart heating systems and the need for energy management, thermal energy metering, digital management, and precise thermal energy scheduling have become the keys to energy conservation. There is an urgent need for a method that can not only achieve high-precision flow and heat measurement, but also achieve high-precision flow and heat regulation to meet the needs of smart heating systems for heating measurement, digital management and scheduling, but the existing technology has not yet been seen. An integrated solution that can realize high-precision flow measurement and regulation.

To sum up, the prior art regulating valve with built-in electromagnetic flow sensor has the following problems:

1) The electrode rotates with the spool, causing the manifold to change and affecting the flow measurement accuracy;

2) The electrode rotates with the spool, and the distributed magnetic field changes, which affects the flow measurement accuracy;

3) The rotation of the valve core is driven by the valve stem, and the torque is large, resulting in inaccurate movement of the valve core;

4) Using point electrodes, the signal noise is large and it is not easy to seal;

5) When the flow rate is adjusted, the flow rate cannot be collected synchronously with high precision, resulting in poor adjustment accuracy, slow speed and frequent movements;

6) The flow adjustment characteristic curve of the valve core is close to linear, and the sensitivity is low when the small flow is adjusted.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an integrated flow measurement and adjustment device with a split structure, so as to solve the inaccurate movement of the valve core caused by the low measurement accuracy and the large driving torque caused by the change of the manifold and the change of the magnetic field after the valve core rotates in the prior art. High noise caused by electrodes, poor flow rate adjustment accuracy, slow adjustment speed and frequent movements, low sensitivity of small flow adjustment, etc., especially to solve the high-precision flow measurement and valve accuracy of balanced heat meters, heating measurement and control terminal equipment, and intelligent balance valves Technical issues such as quick control.

An integrated flow measurement and adjustment device with a split structure, comprising a casing, a left wall of a measuring cavity, a right wall of the measuring cavity, a first electrode, a second electrode, a first baffle, a second baffle, a flow channel inlet, a flow channel Outlet; the shell forms a cavity connecting the inlet and outlet of the flow channel, the left wall of the measuring cavity is located on one side of the cavity and is fixed, and the right wall of the measuring cavity is located on the other side of the cavity and is fixed; the left wall of the measuring cavity and the measuring cavity are fixed. The space between the right walls of the cavity forms a measurement cavity, and the measurement cavity is connected to the flow channel inlet and the flow channel outlet of the casing, thereby forming a flow channel for the fluid medium to pass through; the left wall of the measurement cavity is provided with a first electrode, and the right wall of the measurement cavity is provided with a second electrode , the first electrode and the second electrode are in contact with the fluid medium in the measuring chamber to measure the induced potential generated by the fluid medium; a movable first baffle is set on the side close to the outlet of the flow channel, A movable second baffle is provided on the other side.

The left wall and the right wall of the measuring cavity, the first electrode and the second electrode, the first baffle and the second baffle are symmetrically distributed according to the central axis of the flow channel, so as to facilitate the high-precision measurement of the flow.

One end of the first baffle and the second baffle can be moved toward the central axis of the flow channel, and the other end can be moved or rotated, so as to adjust the flow area of the flow channel.

The moving trajectories of the first baffle plate and the second baffle plate are symmetrical circular arcs.

A first drive shaft and a second drive shaft are arranged between the measurement chamber and the housing, the first drive shaft pushes the first baffle plate to move when the first drive shaft rotates, and the second baffle plate moves when the second drive shaft rotates.

The first drive shaft and the first baffle are provided with mutually fitted gears, and the second drive shaft and the second baffle are provided with mutually fitted gears.

The outlet of the flow passage of the casing is provided with an annular sealing gasket, and the contact surfaces of the sealing gasket and the first baffle and the second baffle are arranged with elastic sealing materials, such as polytetrafluoroethylene, rubber, silica gel, thermoplastic elastic Body and other materials, so as to strengthen the sealing of the first baffle and the second baffle relative to the casing.

A vertical column is further arranged in the middle of the flow channel outlet 11 of the casing 1, and the contact surface of the column and the first baffle and the second baffle is arranged with elastic sealing materials, such as PTFE, rubber, silica gel, thermoplastic elastomer and other materials to strengthen the sealing between the first baffle and the second baffle.

The first baffle is provided with a first elastic body on the side surface close to the outlet of the flow channel; the second baffle is provided with a second elastic body on the side surface close to the outlet of the flow channel. The first elastic body and the second elastic body are made of elastic sealing materials, such as polytetrafluoroethylene, rubber, silicone, thermoplastic elastomer and other materials, so as to facilitate the sealing after the baffle is closed.

The first elastic body adopts a secondary injection molding process and is attached to the surface of the first baffle plate; the second elastic body adopts a secondary injection molding process and is attached to the surface of the second baffle plate.

The end faces of the first baffle plate and the second baffle plate in contact with each other are provided with a first curve and a second curve with W-shaped or V-shaped features in their cross-section, forming a V-shaped or W-shaped opening in the vertical direction to It is beneficial to improve the flow regulation characteristics under small opening.

A protruding first stop block is arranged on one side surface of the cavity of the casing, a first U-shaped groove is arranged on the outer side of the first baffle plate, and the first stop block is located in the first U-shaped groove, which is used when the first baffle plate moves. The other side surface of the cavity of the casing is provided with a second protruding block, the outer side of the second baffle is provided with a second U-shaped groove, and the second block is located in the second U-shaped groove for the second stop Limits when the board moves.

In the cavity of the casing, a protruding first stop is arranged on one side surface close to the inlet of the flow channel, which is used to limit the position of the first baffle plate when moving; The second stop is used to limit the movement of the second baffle.

On the left wall of the measuring cavity, a protruding first stop is arranged on the outer side near the inlet of the flow channel, which is used for limiting the movement of the first baffle plate. On the right wall of the measuring cavity, a protruding second stopper is arranged on the outer side near the inlet of the flow channel, which is used 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 plastic, the first electrode and the second electrode are made of conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by a secondary injection molding process.

The vertical height of the contact surfaces of the first electrode and the second electrode with the fluid medium is greater than the horizontal width, so as to reduce electrode noise and facilitate the high-precision measurement of flow.

While the first baffle plate and the second baffle plate move, the electric potential of the first electrode and the second electrode is measured to obtain the flow rate of the fluid medium, so as to facilitate the high-precision adjustment of the flow rate.

The invention provides a method for reducing the influence of the manifold on the flow measurement accuracy when the flow rate is adjusted. A fixed measuring cavity is arranged in the cavity of the valve body of the present invention, and the electrode of the electromagnetic flow sensor is built in, which is used to measure the velocity of the fluid. The inlet of the flow channel of the valve body is connected to the measuring chamber, which serves as the inlet of the fluid medium. When the fluid is adjusted, the measuring cavity is fixed, so there is no change in the flow channel, and the measuring cavity will not cause the change of the manifold. At the same time, in the present invention, a symmetrical first baffle and a second baffle are arranged between the measuring chamber and the housing, and are driven by the first drive shaft and the second drive shaft simultaneously to realize the adjustment of the flow rate. Due to the symmetrical movement of the first baffle and the second baffle, when the flow is adjusted, the outlet of the measuring chamber is in a symmetrical indented structure, and the change of the flow shape of the fluid is small. According to the characteristics of the electromagnetic flow sensor, the outlet of the measuring cavity adopts a symmetrical tapered indentation design, and the influence on the measurement accuracy can be ignored.

The invention provides a method for reducing the influence of the magnetic field on the flow measurement accuracy when the flow rate is adjusted. A fixed measuring cavity is arranged in the cavity of the valve body of the present invention, and the electrode of the electromagnetic flow sensor is built in, which is used to measure the velocity of the fluid. At the same time, in the present invention, a symmetrical first baffle and a second baffle are arranged between the measuring chamber and the housing, and are driven by the first drive shaft and the second drive shaft simultaneously to realize the adjustment of the flow rate. Since the movement of the first baffle and the second baffle will not affect the magnetic field distribution of the measuring cavity, the flow rate measurement accuracy will not be affected when the flow velocity is adjusted.

The present invention provides a high-precision valve driving method at low torque. In the present invention, a first baffle plate and a second baffle plate, and a first drive shaft and a second drive shaft are respectively arranged between the measuring chamber and the housing. The first drive shaft and the first baffle are provided with mutually fitting gears, and the second drive shaft and the second baffle are provided with mutually fitted gears. When the first drive shaft and the second drive shaft rotate, the first gear is driven. The plate and the second baffle move to realize the adjustment of the flow rate. The baffle plate and the drive shaft form a reduction gear structure, which has a smaller driving torque compared with the valve stem drive. The fitting gear between the drive shaft and the baffle plate of the present invention is arranged near the center line of the baffle plate, and the baffle plate is only subjected to the thrust in the moving direction. , can achieve high-precision flow rate adjustment.

The invention provides a low-noise electrode structure and an electrode sealing method of an electromagnetic flow sensor. In the present invention, electrodes are respectively arranged on the left and right walls of the measuring cavity, the measuring cavity wall is made of insulating plastics, the electrodes are made of conductive plastics, and the insulating plastics and the conductive plastics are tightly combined by a secondary injection molding process. Secondary injection molding is a common process for the production of plastic parts. Two kinds of plastics that are easy to combine are selected, and the tight combination of the two plastics can be ensured through secondary injection molding. Using overmolding, the water tightness of the electrode can be directly provided so that the potential signal of the electrode can be collected. The contact surfaces of the first electrode and the second electrode of the present invention and the fluid medium extend to the top and bottom of the measuring chamber, and are symmetrical to each other, and have a large contact area, which reduces the noise on the electrodes. Since the electrical conductivity of the conductive plastic is low, the electrode with a larger contact area can ensure that the electrode made of the conductive plastic material has good low-noise characteristics.

The invention provides a high-precision flow velocity adjustment method for synchronously collecting flow velocity. A fixed measuring cavity is arranged in the cavity of the valve body of the present invention, and the electrode of the electromagnetic flow sensor is built in, which is used to measure the velocity of the fluid. At the same time, in the present invention, a movable first baffle plate and a second baffle plate are respectively arranged between the measuring cavity and the casing, so as to realize the adjustment of the flow rate. Since the present invention has little influence on the manifold and magnetic field when the flow rate is adjusted, high-precision flow rate measurement can be achieved. Therefore, the present invention also provides high-precision flow rate adjustment by using high-precision synchronous flow rate sampling as a feedback signal for flow rate adjustment.

The present invention provides a way of arranging V-shaped or W-shaped grooves in a vertical direction, and a method for improving the control precision of micro flow. In the present invention, V-shaped or W-shaped curves in the vertical direction are arranged on the opposite end faces of the first baffle and the second baffle and are mutually engaged. When the end faces of the first baffle and the second baffle are close to each other, the The rate of change of the flow area is reduced by the presence of the opening, so that the valve has a higher sensitivity under the same baffle moving speed.

So compared with the prior art, the present invention has the following advantages:

1) When the baffle moves to adjust the flow rate, the measuring cavity and the electrode are fixed, and the flow channel at the entrance of the measuring cavity is fixed, so that no manifold change will occur. , can achieve high-precision flow measurement.

2) When the baffle is moved to adjust the flow rate, the measurement cavity and the electrode are fixed, and the magnetic field distribution in the measurement cavity will not change, which can realize high-precision flow measurement;

3) The baffle and the drive shaft form a reduction gear structure. Compared with the valve stem drive, it has a smaller driving torque, and the baffle only receives the thrust in the moving direction, so the movement is more stable, and high-precision valve adjustment can be achieved;

4) The electrode sampling conductive plastic has a large contact area, and the measurement cavity is sealed by secondary injection molding, the electrode signal noise is low, and the sealing process is simple;

5) Through high-precision synchronous flow rate sampling as the feedback signal in the flow adjustment, the high-precision adjustment of the flow rate is realized.

6) V-shaped or W-shaped grooves arranged in the vertical direction improve the adjustment accuracy under small openings.

Of course, any technical solution of the present invention may not necessarily achieve all the above beneficial effects.

Description of drawings

FIG. 1 is a cross-sectional view of the first embodiment of the integrated flow measuring and regulating device of the split structure of the present invention.

In the figure, the housing 1, the left wall 2a of the measurement chamber, the right wall 2b of the measurement chamber, the first electrode 3a, the second electrode 3b, the first baffle plate 4a, the second baffle plate 4b, the first drive shaft 5a, the second drive shaft 5b, the first elastic body 8a, the second elastic body 8b, the runner inlet 10, the runner outlet 11, the first curve 12a, the second curve 12b, the first stop 13a, the second stop 13b, the first U shape The groove 14a, the second U-shaped groove 14b, and the insulating spacer 16.

Fig. 2 is a cross-sectional view of a second embodiment of the integrated flow measuring and regulating device constituting the split structure of the present invention.

In the figure, the housing 1, the left wall 2a of the measurement chamber, the right wall 2b of the measurement chamber, the first electrode 3a, the second electrode 3b, the first baffle plate 4a, the second baffle plate 4b, the first drive shaft 5a, the second drive shaft 5b, sealing gasket 6, sealing bracket 7, flow channel inlet 10, flow channel outlet 11, first stop 13a, second stop 13b, sealing ring 15, insulating gasket 16.

3 is a cross-sectional view of a third embodiment of the integrated flow measuring and regulating device of the split structure of the present invention.

In the figure, the housing 1, the left wall 2a of the measurement chamber, the right wall 2b of the measurement chamber, the first electrode 3a, the second electrode 3b, the first baffle plate 4a, the second baffle plate 4b, the first drive shaft 5a, the second drive shaft 5b, first elastic body 8a, second elastic body 8b, first pulley 9a, second pulley 9b, runner inlet 10, runner outlet 11, first stop 13a, second stop 13b, insulating gasket 16 .

4 is a cross-sectional view of a fourth embodiment of the integrated flow measuring and regulating device of the split structure of the present invention.

In the figure, the housing 1, the left wall 2a of the measurement chamber, the right wall 2b of the measurement chamber, the first electrode 3a, the second electrode 3b, the first baffle 4a, the second baffle 4b, the flow channel inlet 10, the flow channel outlet 11, Insulating spacer 16.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

Referring to FIG. 1 , it is a cross-sectional view of the first embodiment of the integrated flow measurement and adjustment device of the split structure of the present invention.

This embodiment includes a housing 1, a left wall 2a of the measurement chamber, a right wall 2b of the measurement chamber, 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, first elastic body 8a, second elastic body 8b, runner inlet 10, runner outlet 11, first curve 12a, second curve 12b, first stop 13a, second stop 13b, first U The groove 14a, the second U-shaped groove 14b, the insulating spacer 16.

Inside the casing 1, a cylindrical cavity is formed connecting 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, the flow channel outlet 11, the flow channel inlet 10 and the flow channel The section of the outlet 11 is a rectangle with rounded corners. The measuring cavity walls, electrodes, baffles, drive shafts, etc. in the cylindrical cavity are arranged symmetrically on the left and right sides of the central axis of the flow channel. The left wall 2a of the measuring cavity is located on the left side of the cylindrical cavity, and the right wall 2b of the measuring cavity is located on the right side of the cylindrical cavity. The measuring chamber is used to measure the flow rate of the fluid medium. The flow channel inlet 10 , the measuring cavity, and the flow channel outlet 11 are smoothly butted in sequence, so that the manifold of the fluid medium remains stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring chamber, and the second electrode 3b is vertically arranged on the right wall 2b of the measuring chamber. The contact surface between the electrode and the fluid medium is a rectangle in the vertical direction and forms a larger contact area , in order to reduce the noise caused by the impact of the fluid medium. The first electrode 3a and the second electrode 3b are injection-molded with conductive plastic, and the left wall 2a of the measurement cavity and the right wall 2b of the measurement cavity are made of insulating plastic and electrodes for secondary injection molding, so that the electrodes and the measurement cavity wall are tightly combined to avoid water seepage. The housing 1 is made of conductive materials, such as stainless steel, conductive plastics, etc., to achieve electromagnetic shielding. In this embodiment, an insulating gasket 16 is arranged at the bottom of the measuring cavity to prevent the induced potential of the electrode from being attenuated. The insulating gasket 16 is integrated with the measuring cavity wall, which can simplify the manufacturing process.

A circular arc-shaped first baffle plate 4a is arranged between the housing 1 and the left wall 2a of the measuring cavity, and a first drive shaft 5a is also arranged. The outer arc surface of the first baffle plate 4a and the inner arc surface of the cylindrical cavity of the outer casing 1 Be consistent and move in an arc. An internal gear is provided on a partial area of the inner arc surface of the first baffle plate 4a, which is fitted with the external gear of the first drive shaft 5a. A first U-shaped groove 14a is set on the outer arc surface part of the first baffle plate 4a, and a first stop 13a is set at the corresponding position of the first U-shaped groove 14a in the cylindrical cavity of the housing 1 to limit the first U-shaped groove 14a. The moving position of the shutter 4a. A circular arc-shaped second baffle 4b is arranged between the housing 1 and the right wall 2b of the measuring cavity, and a second drive shaft 5b is also arranged. The outer arc surface of the second baffle 4b and the inner arc surface of the cylindrical cavity of the outer casing 1 Be consistent and move in an arc. An internal gear is provided in a partial area of the inner arc surface of the second baffle plate 4b, and is fitted with the external gear of the second drive shaft 5b. A second U-shaped groove 14b is provided on the outer arc surface portion of the second baffle plate 4b, and a second stop 13b is provided in the cylindrical cavity of the housing 1 at the corresponding position of the second U-shaped groove 14b to limit the second U-shaped groove 14b. The moving position of the shutter 4b. Taking the central axis of the flow channel as the axis of symmetry, the first baffle 4a and the second baffle 4b are arranged symmetrically, the first drive shaft 5a and the second drive shaft 5b are also arranged symmetrically, and the modules of the gears are the same. When the first drive shaft 5a and the second drive shaft 5b rotate at the same speed and in opposite directions, the first baffle 4a and the second baffle 4b are driven to move, and the first baffle 4a and the second baffle 4b are kept in a symmetrical state, When the baffle is moved, the influence of the change of the manifold on the flow measurement is minimized. When the first baffle 4a and the second baffle 4b move towards the flow channel outlet 11 to contact each other, the valve is in a closed state, and when the first baffle 4a and the second baffle 4b move towards the flow channel inlet 10 to When flush with the measuring chamber, the valve is open.

The first baffle 4a is provided with a first elastic body 8a near the outer arc surface and the end face of the flow channel outlet 11, and the cross section of the end face is set as a W-shaped first curve 12a; the second baffle 4b is close to the outer arc of the flow channel outlet 11 The second elastic body 8b is set on the face and the end face, the cross section of the end face is set as a second W-shaped curve 12b, and the first curve 12a and the second curve 12b are complementary curves to ensure that when the valve is closed, the first baffle 4a and The second baffle 4b is sealed. The first elastic body 8a and the second elastic body 8b are made of thermoplastic elastomer material, and are compounded to the baffle plate by a secondary injection molding process. When the valve is in the closed state, the end surfaces of the first baffle 4a and the second baffle 4b are in contact, and the outer side surface is in contact with the inner wall of the cavity of the housing 1, covering and sealing the flow channel outlet 11, thereby cutting off the flow channel. Since the inlet pressure of the flow channel is higher than the outlet pressure, additional pressure of the baffle against the housing can be provided, resulting in a better seal. Since the first curve 12a and the second curve 12b are complementary W-shaped curves, when the baffle plate is moved to a close fit, the flow channel presents a gradually decreasing S-shape, similar to the flow characteristics of an equal percentage control valve, thereby improving the valve performance. Adjust the sensitivity. The W-shaped curve can be designed with different curve shapes according to the required flow adjustment characteristics.

The first drive shaft 5a and the second drive shaft 5b are driven by a stepping motor or a deceleration motor, and work in a low-speed operation state to reduce the interference of the manifold change on the measurement when the first baffle 4a and the second baffle 4b move, When the baffle is moving, the flow can still be measured with high precision. When the first baffle 4a and the second baffle 4b move, the flow rate of the fluid is measured simultaneously as a feedback signal for adjusting the rotational speed of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high precision. The first baffle 4a and the second baffle 4b shown in FIG. 1 are positions where the valve is at a certain opening degree, and are only an example of the valve position.

Referring to FIG. 2 , it is a cross-sectional view of the second embodiment of the integrated flow measurement and adjustment device of the split structure of the present invention.

This embodiment includes a housing 1, a left wall 2a of the measurement chamber, a right wall 2b of the measurement chamber, 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, sealing gasket 6, sealing bracket 7, flow channel inlet 10, flow channel outlet 11, first stop 13a, second stop 13b, sealing ring 15, insulating gasket 16.

Inside the casing 1, an approximately cylindrical cavity is formed connecting 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, the flow channel outlet 11, the flow channel inlet 10 and the flow channel The cross section of the outlet 11 is rectangular. The measuring chamber walls, electrodes, baffles, drive shafts, etc. in the chamber are arranged symmetrically on the left and right sides of the central axis of the flow channel. The left wall 2a of the measuring cavity is located on one side of the cavity, and the right wall 2b of the measuring cavity is located on the other side of the cavity. 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, which is used for the flow measurement of the fluid medium . The flow channel inlet 10 , the measuring cavity, and the flow channel outlet 11 are smoothly butted in sequence, so that the manifold of the fluid medium remains stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring chamber, the second electrode 3b is vertically arranged on the right wall 2b of the measuring chamber, and the contact surfaces of the first electrode 3a and the second electrode 3b with the fluid medium are vertical rectangles , with a larger contact area to reduce electrode noise. The left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity are made of insulating plastic material, and the first electrode 3a and the second electrode 3b are made of metal. The casing 1 is made of metal, such as stainless steel, etc. At the same time, an insulating gasket 16 is provided at the bottom of the measuring chamber in this embodiment to prevent the induced potential of the electrodes from being attenuated.

A circular arc-shaped first baffle plate 4a is arranged between the housing 1 and the left wall 2a of the measuring chamber, and a first drive shaft 5a is arranged at the same time. The inner cambered surface of the first baffle plate 4a is provided with an internal gear, which is fitted with the external gear of the first drive shaft 5a. A circular arc-shaped second baffle plate 4b is arranged between the housing 1 and the right wall 2b of the measuring chamber, and a second drive shaft 5b is arranged at the same time. An internal gear is provided on the inner arc surface of the second baffle plate 4b, and is fitted with the external gear of the second drive shaft 5b. The first baffle 4a and the second baffle 4b are symmetrically arranged, and can move to the center of the flow channel under the drive of the drive shaft, so as to realize the opening and closing of the valve. The first drive shaft 5a and the second drive shaft 5b rotate at the same speed and in opposite directions to ensure the symmetrical movement of the first baffle 4a and the second baffle 4b, so that the influence of the change of the manifold on the flow measurement is minimized . The left wall 2a of the measurement chamber includes a first stop 13a near the inlet 10 of the flow channel to limit the moving position of the first baffle 4a, and the right wall 2b of the measurement chamber is provided with a second stop 13b near the inlet 10 of the flow channel for The movement position of the second shutter 4b is restricted.

The outlet 11 of the flow channel of the casing 1 is provided with an annular sealing gasket 6 with a middle column and a sealing bracket 7 , and the sealing bracket 7 adopts a material with high rigidity to provide the support of the sealing gasket 6 . The sealing gasket 6 is made of thermoplastic elastomer material, and is compounded on the sealing bracket 7 by an injection molding process to form a rigid-flexible compound sealing element. The outer sides of the first baffle 4a and the second baffle 4b are in contact with the sealing gasket 6, relying on the elastic properties of the material of the sealing gasket 6 to provide the first baffle 4a and the second baffle 4b and the casing 1 seal, and The first baffle 4a and the second baffle 4b are sealed with the left wall 2a of the measurement chamber and the right wall 2b of the measurement chamber. When the first baffle 4a and the second baffle 4b are close to the center of the flow channel, they are fitted with the middle column of the annular sealing gasket 6, and at the same time, the first baffle 4a and the second baffle 4a and the The second baffle plate 4b further presses the annular sealing gasket 6 to realize the complete closing of the valve. An annular sealing ring 15 is provided at the flow channel inlet 10 of the housing 1 to provide a seal between the housing 1 and the wall of the measuring cavity to prevent the fluid medium from forming a flow channel outside the measuring cavity and affecting the flow measurement accuracy. At the same time, relying on the sealing gasket 6 and the sealing ring 15, the first drive shaft 5a and the second drive shaft 5b are provided with sealing of the rotating space, which is beneficial to prevent foreign objects from entering the rotating space and improve the reliability of valve movement.

The first drive shaft 5a and the second drive shaft 5b use a stepping motor or a deceleration motor, and work in a low-speed operation state to reduce the interference of the manifold when the first baffle 4a and the second baffle 4b move, so that the flow High-precision measurement can be achieved. When the first baffle 4a and the second baffle 4b move, the flow rate of the fluid is measured simultaneously as a feedback signal for adjusting the rotational speed of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high precision. The first baffle 4a and the second baffle 4b shown in FIG. 2 are positions where the valve is at a certain opening, and are only an example of the valve position.

Referring to FIG. 3 , it is a cross-sectional view of the third embodiment of the integrated flow measurement and adjustment device of the split structure of the present invention.

This embodiment includes a housing 1, a left wall 2a of the measurement chamber, a right wall 2b of the measurement chamber, 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, first elastic body 8a, second elastic body 8b, first pulley 9a, second pulley 9b, runner inlet 10, runner outlet 11, first stop 13a, second stop 13b, insulating gasket 16.

Inside the casing 1, a cylindrical cavity is formed connecting 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, the flow channel outlet 11, the flow channel inlet 10 and the flow channel The section of the outlet 11 is a rectangle with rounded corners. The measuring cavity walls, electrodes, baffles, drive shafts, pulleys, etc. in the cylindrical cavity are arranged symmetrically on the left and right sides of the central axis of the flow channel. The left wall 2a of the measuring cavity is located on the left side of the cylindrical cavity, and the right wall 2b of the measuring cavity is located on the right side of the cylindrical cavity. The measuring chamber is used to measure the flow rate of the fluid medium. The flow channel inlet 10 , the measuring cavity, and the flow channel outlet 11 are smoothly butted in sequence, so that the manifold of the fluid medium remains stable. The first electrode 3a is vertically arranged on the left wall 2a of the measurement chamber, the second electrode 3b is vertically arranged on the right wall 2b of the measurement chamber, and is symmetrically arranged, and the contact surfaces of the first electrode 3a and the second electrode 3b with the fluid medium are vertical The direction of the rectangle has a large contact area to reduce electrode noise caused by fluid impact. The wall of the measuring cavity is made of insulating plastic, and the first electrode 3a and the second electrode 3b are made of conductive plastic. Sealing between electrodes to facilitate the transmission of electrode signals. Secondary injection molding is a common injection molding process. In this embodiment, the electrode parts are firstly formed by the conventional injection molding process, and then the electrode parts are used as inserts for the second injection molding to form the entire measuring cavity. Using the same base material is beneficial to increase the bonding degree of the two parts. In this embodiment, in order to reduce the interference of the external electromagnetic signal to the electrode signal and simplify the manufacturing process, the casing 1 is made of conductive plastic. In this embodiment, an insulating gasket 16 is arranged at the bottom of the measuring cavity to prevent the induced potential of the electrode from being attenuated. The insulating gasket 16 is integrated with the measuring cavity wall, which can simplify the manufacturing process.

A circular arc-shaped first baffle plate 4a is arranged between the housing 1 and the left wall 2a of the measuring chamber. At the same time, a first drive shaft 5a is arranged outside the first baffle plate 4a, and a first pulley 9a is arranged inside. On the outer arc surface of the first baffle plate 4a, a first elastic body 8a is arranged near the outlet 11 of the flow channel, and an external gear is arranged near the inlet 10 of the flow channel, and the external gear is fitted with the gear of the first drive shaft 5a; A circular arc-shaped second baffle 4b is arranged between the right wall 2b of the cavity, at the same time a second drive shaft 5b is arranged on the outside of the second baffle 4b, a second pulley 9b is arranged inside, and the outer arc surface of the second baffle 4b, A second elastic body 8b is provided near the flow channel outlet 11, and an external gear is provided near the flow channel inlet 10, and the external gear is fitted with the gear of the second drive shaft 5b. The outer arcs of the first baffle 4a and the second baffle 4b are consistent with the arcs of the cylindrical cavity of the housing 1, and can move along the arcs. The housing 1 is provided with a protruding limit block on each side near the inlet 10 of the flow channel, the first stop block 13a and the second stop block 13b, which are used for the movement limit of the first baffle 4a and the second baffle 4b. bit. The first baffle 4a and the second baffle 4b are symmetrically arranged, and can move symmetrically under the drive of the drive shaft, thereby realizing the opening and closing of the valve. The modules of the first drive shaft 5a and the second drive shaft 5b are the same. When the shafts rotate at the same rotational speed and in opposite directions, the symmetrical movement of the first baffle 4a and the second baffle 4b can be ensured, so that the manifold Changes have minimal impact on flow measurement. In order to ensure that the first baffle plate 4a and the second baffle plate 4b move along the arc, and to ensure the stable fitting of the first drive shaft 5a and the second drive shaft 5b, in this embodiment, a first pulley 9a and a second pulley 9b are provided, It is used to limit the movement of the first baffle 4a and the second baffle 4b. The first pulley 9a and the second pulley 9b can be rotated to reduce the frictional force when the baffle plate moves.

The first elastic body 8a and the second elastic body 8b are made of thermoplastic elastomer material, and are respectively compounded on the first baffle plate 4a and the second baffle plate 4b by an injection molding process to form a rigid-flexible compound sealing element. The first elastic body 8a and the second elastic body 8b are in contact with the housing 1, and rely on the elastic properties of the material to provide the sealing of the first baffle 4a and the second baffle 4b with the casing 1, as well as the first baffle 4a and the second baffle Seal between baffles 4b.

The first drive shaft 5a and the second drive shaft 5b use a stepping motor or a deceleration motor, and work in a low-speed operation state to reduce the interference of the manifold when the first baffle 4a and the second baffle 4b move, so that the flow High-precision measurement can be achieved. When the first baffle 4a and the second baffle 4b move, the flow rate of the fluid is measured simultaneously as a feedback signal for adjusting the rotational speed of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high precision. The first baffle 4a and the second baffle 4b shown in FIG. 3 are positions where the valve is at a certain opening, and are only an example of the valve position.

Referring to FIG. 4 , it is a cross-sectional view of the fourth embodiment of the integrated flow measurement and adjustment device of the split structure of the present invention.

This embodiment includes a housing 1, a left wall 2a of the measurement chamber, a right wall 2b of the measurement chamber, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a flow channel inlet 10, and a flow channel outlet 11 , insulating gasket 16 .

Inside the housing 1, an approximate cubic cavity is formed connecting 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, the flow channel outlet 11, the flow channel inlet 10 and the flow channel outlet 11 The cross section is a rounded rectangle. The measuring cavity walls, electrodes, baffles, etc. in the cavity are arranged symmetrically on the left and right sides according to the central axis of the flow channel. The left wall 2a of the measuring cavity is located on the left side of the cavity, and the right wall 2b of the measuring cavity is located on the right side of the cavity. For measuring the flow of fluid media. The flow channel inlet 10 , the measuring cavity, and the flow channel outlet 11 are smoothly butted in sequence, so that the manifold of the fluid medium remains stable. The first electrode 3a is vertically arranged on the left wall 2a of the measuring chamber, and the second electrode 3b is vertically arranged on the right wall 2b of the measuring chamber. The contact surface between the electrode and the fluid medium is a rectangle in the vertical direction and forms a larger contact area , in order to reduce the noise caused by the impact of the fluid medium. The first electrode 3a and the second electrode 3b are made of conductive plastic injection molding, the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity are made of insulating plastic, and the electrodes are overmolded, so that the electrodes and the measuring cavity wall are tightly combined to avoid the electrode position Water seeps out. The housing 1 is made of conductive materials, such as stainless steel, conductive plastics, etc., to achieve electromagnetic shielding. In this embodiment, an insulating gasket 16 is arranged at the bottom of the measuring cavity to prevent the induced potential of the electrode from being attenuated. The insulating gasket 16 is integrated with the measuring cavity wall, which can simplify the manufacturing process.

A first baffle 4a is provided on the left side of the flow channel outlet 11 of the housing 1, and one end of the first baffle 4a close to the left wall 2a of the measurement cavity can be rotated, thereby driving the other end to move. A second baffle plate 4b is provided on the right side of the flow channel outlet 11 of the housing 1, and one end of the second baffle plate 4b close to the right wall 2b of the measurement cavity can be rotated, thereby driving the other end to move. The first baffle 4a and the second baffle 4b are symmetrically arranged, and can move toward the center of the flow channel when rotated, thereby realizing the opening and closing of the valve. If the moving speed of the first baffle 4a and the second baffle 4b is the same, the symmetrical state of the baffles can be maintained, so that the influence of the manifold change when the valve is opened and closed can be minimized on the flow measurement.

The first baffle 4a and the second baffle 4b use a stepping motor or a deceleration motor, and work at a low speed to reduce the interference of the manifold when the first baffle 4a and the second baffle 4b move, so that the flow High-precision measurement can be achieved. When the first baffle 4a and the second baffle 4b move, the flow rate of the fluid is measured at the same time as a feedback signal for adjusting the rotational speed, so that the flow rate can be adjusted with high precision. The first baffle 4a and the second baffle 4b shown in FIG. 4 are positions where the valve is at a certain opening degree, and are only an example of the valve position.

This embodiment is an integrated flow measurement and adjustment device with a split structure. The inner cavity of the outer casing is a cylinder or an approximate cylinder, and the baffle adopts an arc shape that is consistent with or similar to the arc surface of the cylinder, so as to reduce the flow rate of the valve body. Size, just an optimized arrangement. In this embodiment, the inner cavity of the casing is approximately a cube, and the baffle adopts a wedge shape. Although the volume of the valve is increased, the influence of the manifold change can be further reduced, which is another optimal arrangement. The use of an arc that is approximately a straight line is also a method to reduce the influence of the manifold and reduce the volume, and does not affect the characteristics of the device. This is a technology well known to those skilled in the art, and such situations are also protected by the present invention. within the range.

This embodiment is an integrated flow measurement and adjustment device with a split structure. The inner cavity of the housing is cylindrical, approximately cylindrical and approximately cubic, and can also be designed to be conical or cubic-conical to facilitate sealing and assembly. The changes of these shapes do not affect the characteristics of the device, which are well-known technologies to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. In order to ensure the movement of the baffle, a pulley mechanism is provided, and a limit mechanism such as a guide rail and a slider can also be further provided. It does not affect the substantial performance of the device, and is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure, which uses a gear fitting method to drive the movement of the baffle, and can also use other driving methods such as push rods, connecting rods, rocker arms, etc. The settings of these mechanisms are not It does not affect the substantial performance of the device, and is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. One end of the baffle plate moves along an arc toward the central axis of the flow channel, and the other end also moves or rotates along the same arc. The movement of the baffle can also be designed to move to the central axis of the flow channel according to other paths, and one end and the other end of the baffle can move along different paths. The setting of these mechanisms does not affect the flow measurement and adjustment characteristics of the device. , is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. The cavity adopts a symmetrical arrangement, but only to achieve the best flow measurement accuracy, an asymmetric arrangement can also be used, which can also meet the flow measurement requirements of a certain accuracy. The design of this asymmetric flow channel only has a certain impact on the flow measurement accuracy, but does not affect the ability of the device to improve the flow measurement accuracy. within the scope of protection of the invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. The electrodes are made of metal materials or conductive plastics, or a composite method of metal and conductive plastics can be used, that is, the contact part of the fluid medium is made of metal materials, so as to reduce the electrode Noise, and conductive plastic is used for electrode signal extraction to realize electrode sealing. This technology is a public technology and is well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. The end face contacted by the baffle adopts a W-shaped curve, or other types of curves to achieve various flow adjustment characteristics. This technology is an open technology , is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure, which does not include the technology of the excitation device part. The relevant excitation device can adopt the general technology disclosed at present, which does not affect the characteristics of the device, which is known by those skilled in the art. Well-known technology, such situations are also within the scope of protection of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure, which does not include the technology of the electrode signal extraction part. The electrode signal extraction can adopt the currently disclosed general technology, which does not affect the characteristics of the device, which is a technology in the art Such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure, which does not include the structure of the upper cover part of the measurement cavity. The mechanism of the upper cover part of the measurement cavity can adopt the currently disclosed general technology, which does not affect the characteristics of the device. , is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure, which does not include the technology of the baffle motor drive mechanism. The relevant baffle motor drive mechanism can adopt the currently disclosed general technology, which does not affect the characteristics of the device. Technology well known to those skilled in the art, such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. The baffle moves or rotates in the horizontal direction, and the baffle can also move or rotate in the vertical direction. This kind of mirroring and/or rotating the baffle at any angle only An arrangement of the baffles, for different excitation methods, the best baffle arrangement can be selected, these do not affect the essential characteristics of the device, and are well-known to those skilled in the art, and such situations are also described in this paper within the scope of protection of the invention.

In this embodiment, an integrated flow measurement and adjustment device with a split structure is used to form a combined baffle by combining a larger number of baffles, sealing parts, driving parts, etc., but the change of this simple combination form does not It does not affect the essential characteristics of the device, it is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

This embodiment is an integrated flow measurement and adjustment device with a split structure. Mirroring and/or rotating the device at any angle does not affect the characteristics of the device, which is a technology well known to those skilled in the art. within the protection scope of the present invention.

The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims (16)

1. An integrated flow measurement and adjustment device with a split structure, characterized in that it comprises a casing (1), a left wall of the measurement cavity (2a), a right wall of the measurement cavity (2b), a first electrode (3a), a Two electrodes (3b), a first baffle plate (4a), a second baffle plate (4b), a flow channel inlet (10), a flow channel outlet (11); the casing (1) forms a connection between the flow channel inlet (10) and the flow channel outlet (11). The cavity of the outlet (11), the left wall (2a) of the measuring cavity is located on one side of the cavity and is fixed, and the right wall (2b) of the measuring cavity is located on the other side of the cavity and is fixed; the left wall of the measuring cavity (2a) and The space between the right walls (2b) of the measuring cavity forms a measuring cavity, and the measuring cavity is connected with the flow channel inlet (10) and the flow channel outlet (11) of the casing (1), thereby forming a flow channel through which the fluid medium passes; the left wall of the measuring cavity (2a) A first electrode (3a) is provided, a second electrode (3b) is provided on the right wall (2b) of the measurement chamber, and the first electrode (3a) and the second electrode (3b) are in contact with the fluid medium in the measurement chamber for Measure the induced potential generated by the fluid medium; set a movable first baffle (4a) on the side close to the flow channel outlet (11), and set a movable second baffle on the other side close to the flow channel outlet (11) Plate (4b). 2. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: the left wall (2a) of the measurement cavity, the right wall (2b) of the measurement cavity, the first electrode (3a) ) and the second electrode (3b), the first baffle plate (4a) and the second baffle plate (4b) are symmetrically distributed according to the central axis of the flow channel, so as to facilitate the high-precision measurement of the flow. 3. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: one end of the first baffle plate (4a) and the second baffle plate (4b) can face the flow channel The central axis moves, and the other end can be moved or rotated, so as to adjust the flow area of the flow channel. 4. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: the moving trajectories of the first baffle plate (4a) and the second baffle plate (4b) are symmetrical arc. 5 . The integrated flow measurement and adjustment device with a split structure according to claim 1 , wherein a first drive shaft ( 5 a ) and a second drive shaft are arranged between the measurement cavity and the housing ( 1 ). 6 . The shaft (5b) pushes the first baffle plate (4a) to move when the first drive shaft (5a) rotates, and pushes the second baffle plate (4b) to move when the second drive shaft (5b) rotates. 6. An integrated flow measurement and adjustment device with a split structure according to claim 5, characterized in that: the first drive shaft (5a) and the first baffle plate (4a) are provided with mutually fitting Gears, the second drive shaft (5b) and the second baffle plate (4b) are provided with gears that fit each other. 7. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: an annular sealing gasket (6) is provided at the flow channel outlet (11) of the casing (1) , the contact surfaces of the sealing gasket (6) with the first baffle plate (4a) and the second baffle plate (4b) are arranged with elastic sealing materials, and the elastic sealing materials include polytetrafluoroethylene, rubber, silicone, thermoplastic elastic so as to strengthen the sealing performance of the first baffle (4a) and the second baffle (4b) with respect to the casing (1). 8. An integrated flow measurement and adjustment device with a split structure according to claim 1 or 7, characterized in that: a vertical column (7) is further provided in the middle of the flow channel outlet (11) of the casing (1). ), the contact surface between the upright (7) and the first baffle (4a) and the second baffle (4b) is arranged with elastic sealing material to strengthen the relationship between the first baffle (4a) and the second baffle (4b). tightness between. 9 . The integrated flow measurement and adjustment device with a split structure according to claim 1 , wherein the first baffle plate ( 4 a ) is provided with a side surface close to the flow channel outlet ( 11 ). 10 . The first elastic body (8a); the second baffle plate (4b) is provided with a second elastic body (8b) on the side surface close to the flow channel outlet (11); the first elastic body (8a) and the second elastic body ( 8b) Use elastic sealing material to facilitate sealing after the baffle is closed. 10 . The integrated flow measurement and adjustment device with a split structure according to claim 9 , wherein the first elastic body ( 8 a ) adopts a secondary injection molding process and is attached to the first baffle plate ( 4 a ). 11 . ) surface; the second elastomer (8b) is adhered to the surface of the second baffle plate (4b) by a secondary injection molding process. 11. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: the end faces of the first baffle (4a) and the second baffle (4b) that are in contact with each other, which The cross section is provided with a first curve (12a) and a second curve (12b) characterized by a W-shaped or V-shaped shape, forming a V-shaped or W-shaped opening in the vertical direction, so as to improve the flow regulation characteristics at a small opening. 12. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: a protruding first stopper (13a) is provided on one side surface of the cavity of the housing (1), The outer side of the first baffle plate (4a) is provided with a first U-shaped groove (14a), and the first stop block (13a) is located in the first U-shaped groove (14a) for limiting the movement of the first baffle plate (4a). position; the other side surface of the cavity of the casing (1) is provided with a protruding second stopper (13b), the outer side of the second baffle plate (4b) is provided with a second U-shaped groove (14b), and the second stopper (13b) It is located in the second U-shaped groove (14b) and is used to limit the movement of the second baffle plate (4b). 13. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: the cavity of the casing (1) is provided on the side surface close to the flow channel inlet (10). The protruding first stop (13a) is used to limit the movement of the first baffle plate (4a); the second protruding stop (13b) is provided on the other side surface close to the flow channel inlet (10), with The limit when the second baffle (4b) moves. 14. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: the left wall (2a) of the measurement cavity is provided with a protruding protrusion on the outer side close to the flow channel inlet (10). The first stop (13a) is used to limit the movement of the first baffle plate (4a); the right wall (2b) of the measuring cavity is provided with a protruding second stop (13b) on the outer side near the flow channel inlet (10). ) to limit the movement of the second baffle (4b). 15 . The integrated flow measurement and adjustment device with a split structure according to claim 1 , wherein: the casing ( 1 ) is made of conductive materials, including metal and conductive plastic; 15 . The left wall (2a) of the measuring cavity and the right wall (2b) of the measuring cavity are made of insulating plastic, the first electrode (3a) and the second electrode (3b) are made of conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by a secondary injection molding process. . 16. An integrated flow measurement and adjustment device with a split structure according to claim 1, characterized in that: the contact surfaces of the first electrode (3a) and the second electrode (3b) with the fluid medium, Its vertical height is greater than its horizontal width to reduce electrode noise and facilitate high-precision flow measurement.

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