CN112815127A - Pressure regulating valve, control system thereof and smoke concentration measuring device with pressure regulating valve - Google Patents
Pressure regulating valve, control system thereof and smoke concentration measuring device with pressure regulating valve Download PDFInfo
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- CN112815127A CN112815127A CN201911129835.6A CN201911129835A CN112815127A CN 112815127 A CN112815127 A CN 112815127A CN 201911129835 A CN201911129835 A CN 201911129835A CN 112815127 A CN112815127 A CN 112815127A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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Abstract
本申请公开了一种调压阀及其控制系统、具有其的烟尘浓度测量装置，调压阀包括阀体以及设置于阀体内的阀座，阀座内设有沿第一直线方向延伸设置的调压腔，调压腔具有贯穿阀座设置的进气端以及与进气端相对设置的排气端，进气端和排气端皆与外部连通设置；还包括调节杆，调节杆为中空结构且与调压腔同轴设置，调节杆具有从排气端穿设至调压腔中的伸入端，伸入端的外周面与调压腔的腔壁之间形成有排气间隙，排气间隙的截面积大小可调节地设置。本申请提供的调压阀及其控制系统、具有其的烟尘浓度测量装置，可使得调节阀内形成的样气通道为直通型，显著降低了烟尘的聚集程度，且提高了调压阀的使用寿命以及烟尘浓度测量装置的测量准确度。
The application discloses a pressure regulating valve and a control system thereof, and a smoke concentration measuring device having the same. The pressure regulating valve includes a valve body and a valve seat arranged in the valve body, and the valve seat is provided with a valve seat extending along a first linear direction. The pressure regulating chamber has an intake end arranged through the valve seat and an exhaust end arranged opposite to the intake end, and both the intake end and the exhaust end are communicated with the outside; it also includes an adjustment rod, and the adjustment rod is The hollow structure is arranged coaxially with the pressure regulating chamber. The regulating rod has a protruding end penetrated from the exhaust end into the pressure regulating chamber, and an exhaust gap is formed between the outer peripheral surface of the protruding end and the cavity wall of the pressure regulating chamber. The size of the cross-sectional area of the exhaust gap is adjustable. The pressure regulating valve, its control system, and the soot concentration measuring device provided by the present application can make the sample gas channel formed in the regulating valve a straight-through type, which can significantly reduce the accumulation degree of soot and improve the use of the pressure regulating valve. Lifetime and measurement accuracy of soot concentration measuring devices.
Description
Technical Field
The invention relates to the technical field of concentration detection, in particular to the technical field of smoke concentration detection, and particularly relates to a pressure regulating valve, a control system thereof and a smoke concentration measuring device with the pressure regulating valve.
Background
The smoke concentration measuring device is a common measuring instrument and is used for measuring the smoke concentration generated after fuel is combusted. The smoke concentration measuring device comprises a sampling pipeline, and the sample gas to be measured is guided into the measuring device through the sampling pipeline to measure the concentration. The sampling pipeline is required to be provided with a pressure regulating valve, and the pressure regulating valve is used for regulating the air pressure of the sample gas in the sampling pipeline so as to protect the smoke concentration measuring device. In the smoke concentration measuring device, in order to ensure the accuracy of smoke concentration measurement data, the sampling pipeline is in a straight-through type as much as possible. When a bent part must exist in the sampling pipeline, the bending radius of the bent part is more than 10 times of the inner diameter of the pipeline so as to avoid forming a dead bend, and the accuracy of smoke concentration measurement data is further ensured.
Because current air-vent valve carries out the pressure release through modes such as throttle or backpressure for have the kink in the sample gas channel in the air-vent valve and the kink is the dead bend, so there is the smoke and dust easy gathering in the dead bend department in the air-vent valve, not only can reduce smoke and dust concentration measurement device's measurement accuracy, but also can reduce the life of air-vent valve.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a pressure regulating valve and a control system thereof, and a soot concentration measuring device having the same.
In a first aspect, the application provides a pressure regulating valve, which comprises a valve body and a valve seat arranged in the valve body, wherein a pressure regulating cavity extending along a first linear direction is arranged in the valve seat, the pressure regulating cavity is provided with an air inlet end penetrating through the valve seat and an air outlet end opposite to the air inlet end, and the air inlet end and the air outlet end are both communicated with the outside;
the pressure regulating device is characterized by further comprising an adjusting rod, the adjusting rod is of a hollow structure and is coaxially arranged with the pressure regulating cavity, the adjusting rod is provided with an extending end penetrating into the pressure regulating cavity from the exhaust end, an exhaust gap is formed between the peripheral surface of the extending end and the cavity wall of the pressure regulating cavity, and the sectional area of the exhaust gap is adjustably arranged.
In some preferred embodiments, the adjusting rod is reciprocally movably disposed on the valve body along a first linear direction to adjust the size of the cross-sectional area of the exhaust gap, wherein at least one of the cavity wall and the outer peripheral surface of the extending end of the pressure regulating cavity includes an inner diameter gradually-changing section, and the inner diameter of the inner diameter gradually increases or decreases along the first linear direction.
In some preferred embodiments, the cavity wall of the pressure regulating cavity includes an inner diameter gradually-changing section, the inner diameter gradually-changing section is a tapered section extending along the first linear direction, the large-diameter end of the tapered section is arranged away from the air inlet end, the extending end is of a round rod structure, and the diameter value of the outer peripheral surface of the extending end is greater than or equal to the minimum diameter value of the inner diameter gradually-changing section.
In some preferred embodiments, the exhaust end of the pressure regulating cavity is arranged through the valve seat, and the pressure regulating valve further comprises an exhaust pipe arranged on the valve body, wherein one end of the exhaust pipe is communicated to the exhaust end, and the other end of the exhaust pipe is communicated to the outside.
In some preferred embodiments, a first guide ring is arranged in the exhaust end, a through hole is arranged on the pipe wall of the exhaust pipe, a second guide ring is arranged in the through hole, and the adjusting rod movably penetrates through the first guide ring and the second guide ring.
In some preferred embodiments, the pressure regulating valve further comprises a heat-insulating sleeve, and the heat-insulating sleeve is arranged on a part of the regulating rod, which is different from the extending end.
In some preferred embodiments, the pressure regulating valve further comprises a sample inlet fitting mounted at the gas inlet end.
In some preferred embodiments, the device further comprises a driving device, and the driving device is in driving connection with the adjusting rod so as to drive the adjusting rod to move back and forth along the first linear direction.
In a second aspect, the present application further provides a control system for a pressure regulating valve, including the pressure regulating valve, further including:
the pressure sensor is arranged in the pressure regulating cavity and positioned on one side of the extending end, which is far away from the exhaust end, and is used for measuring the air pressure value at the position;
and the processor is respectively connected with the pressure sensor and the driving device in the pressure regulating valve and is used for controlling the driving device to drive the adjusting rod to move so as to increase the sectional area of the exhaust gap when the air pressure value exceeds a preset air pressure threshold value.
In a third aspect, the present application further provides a smoke concentration measuring device, which includes a sampling pipeline and a pressure regulating valve, wherein the pressure regulating valve is installed in the sampling pipeline.
The application provides a pressure-regulating valve and control system and have its smoke and dust concentration measuring device have following beneficial effect at least:
1. the application provides a pressure-regulating valve and have its smoke and dust concentration measurement device, the sectional area size through adjusting the exhaust clearance realizes changing the atmospheric pressure value of the inside appearance gas of governing valve, through setting up pressure regulating chamber and regulation pole into the straight-through type structure of coaxial setting so that the appearance gas passage that forms in the governing valve is straight-through type simultaneously, is showing the gathering degree that has reduced the smoke and dust, and has improved the life of pressure-regulating valve and smoke and dust concentration measurement device's measurement accuracy.
2. The application provides a control system of pressure regulating valve, when exceeding predetermined atmospheric pressure threshold value, automatic control drive arrangement drive regulation pole removes in order to increase the sectional area in exhaust clearance through judging the atmospheric pressure value that pressure sensor surveyed in the pressure regulating valve, and then realizes the purpose of automatic pressure release, has improved the control intellectuality of pressure regulating valve.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic perspective view of a pressure regulating valve provided in an embodiment of the present application;
fig. 2 is a longitudinal half-sectional view of a pressure regulating valve provided in an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-2, the present application provides a pressure regulating valve, including a valve body 100 and a valve seat 200 disposed in the valve body 100, a pressure regulating cavity 210 extending along a first linear direction is disposed in the valve seat 200, the pressure regulating cavity 210 has an air inlet 211 penetrating the valve seat 200 and an air outlet 212 opposite to the air inlet 211, and both the air inlet 211 and the air outlet 212 are disposed in communication with the outside;
the pressure regulating device further comprises an adjusting rod 300, the adjusting rod 300 is of a hollow structure and is coaxially arranged with the pressure regulating cavity 210, the adjusting rod 300 is provided with an extending end 310 penetrating into the pressure regulating cavity 210 from the exhaust end 212, an exhaust gap is formed between the peripheral surface of the extending end 310 and the cavity wall of the pressure regulating cavity 210, and the sectional area of the exhaust gap is adjustably arranged.
In this embodiment, the valve body 100 has a valve cavity therein, and the valve seat 200 is fixedly mounted in the valve cavity or detachably mounted in the valve cavity. The pressure regulating cavity 210 is arranged in the valve seat 200, and the pressure regulating cavity 210 extends along a first straight line direction. The pressure-regulating chamber 210 has two opposite ends, namely an air inlet end 211 for sample gas to enter the pressure-regulating chamber 210 and an air outlet end 212 for sample gas to exit the pressure-regulating chamber 210. Air inlet end 211 runs through valve seat 200 and sets up and communicate with the outside, is convenient for carry the sample gas in the sampling pipeline to air inlet end 211. The sampling line may be directly interfaced with the exhaust end 212 or the sampling line may be indirectly interfaced with the exhaust end 212. When the sampling pipeline is indirectly connected with the exhaust end 212, it is ensured that the gas passage between the sampling pipeline and the exhaust end 212 is coaxially arranged with the pressure regulating cavity 210, so as to avoid the existence of a bent part. The adjusting rod 300 is a hollow structure and is coaxially arranged with the pressure regulating cavity 210, and the sample gas to be measured in the pressure regulating cavity 210 is output through the adjusting rod 300, so that the sample gas can flow along a straight line in the pressure regulating valve. The end 310 of adjusting pole 300 that stretches into wears to establish to pressure regulating chamber 210 from exhaust end 212 and is located between inlet end 211 and the exhaust end 212, stretches into and is formed with the exhaust clearance between the outer peripheral face of end 310 and the chamber wall in pressure regulating chamber 210, and the exhaust clearance is used for realizing the purpose of pressure release, and the concrete process that realizes the pressure release is: when the pressure regulating valve needs to be decompressed, sample gas to be discharged (hereinafter referred to as partial sample gas) is discharged to the exhaust end 212 from the exhaust gap, and the exhaust end 212 is communicated with the outside, so that partial sample gas entering the exhaust end 212 can be discharged to the outside. The sectional area of the exhaust gap can be adjustably set, so that the exhaust flow of part of sample gas can be adjusted, and the aim of releasing different pressures is fulfilled.
It should be understood that the first linear direction is understood herein to be a flowing direction of the sample gas to be measured in the pressure regulating valve during normal use of the pressure regulating valve, for example, a linear direction indicated by an arrow a in fig. 2. The adjustment range of the sectional area of the exhaust gap should be 0 or more. When the sectional area of the exhaust gap is 0, the outer circumferential surface of the end 310 and the wall of the pressure regulating chamber 210 are in a contact closed state in the circumferential direction, and the pressure regulating valve does not perform the pressure relief operation.
In this embodiment, the change of the pressure value of the sample gas inside the regulating valve is realized by adjusting the sectional area of the exhaust gap, and the sample gas channel formed in the regulating valve is a straight-through type by setting the pressure regulating chamber 210 and the regulating rod 300 to be a straight-through type structure coaxially arranged, so that the accumulation degree of the smoke is remarkably reduced, and the service life of the pressure regulating valve and the measurement accuracy of the smoke concentration measuring device are improved.
In some preferred embodiments, the adjusting rod 300 is reciprocally movably disposed on the valve body 100 along a first linear direction to adjust the size of the cross-sectional area of the exhaust gap, wherein at least one of the cavity wall of the pressure regulating cavity 210 and the outer circumferential surface of the extending end 310 includes an inner diameter gradually-changing section 213, and the inner diameter of the inner diameter gradually-changing section 213 gradually increases or decreases along the first linear direction.
This embodiment provides a preferred embodiment for adjusting the size of the cross-sectional area of the exhaust gap. In this embodiment, at least one of the cavity wall of the pressure regulating cavity 210 and the outer peripheral surface of the extending end 310 includes an inner diameter gradually-changing section 213, the gradually-changing section 213 is a section in which the inner diameter of the inner diameter gradually-changing section 213 gradually increases along a first straight line direction (hereinafter, referred to as an inner diameter gradually-increasing section) or gradually decreases along the first straight line direction (hereinafter, referred to as an inner diameter gradually-decreasing section), and the adjusting rod 300 is reciprocally disposed along the first straight line direction relative to the valve body 100 to adjust the cross-sectional area of the exhaust gap. In this embodiment, six matching manners exist between the cavity wall of the pressure regulating cavity 210 and the outer peripheral surface of the extending end 310: firstly, the wall of the pressure regulating cavity 210 includes an inner diameter gradually expanding section, and the adjusting rod 300 is provided with the inner diameter gradually expanding section; secondly, the wall of the pressure regulating cavity 210 includes an inner diameter gradually expanding section, and the inner diameter gradually expanding section 213 is not arranged on the regulating rod 300; thirdly, the wall of the pressure regulating cavity 210 includes an inner diameter gradually expanding section, and the regulating rod 300 is provided with an inner diameter gradually contracting section; fourthly, an inner diameter tapered section is arranged in the cavity wall of the pressure regulating cavity 210, and the adjusting rod 300 comprises an inner diameter tapered section; fifthly, an inner diameter reducing section is arranged in the cavity wall of the pressure regulating cavity 210, and the regulating rod 300 comprises the inner diameter reducing section; sixth, the pressure regulating chamber 210 does not have the inner diameter transition 213 in the chamber wall, and the adjustment rod 300 also includes an inner diameter transition. The transition section 213 is a transition section 213 in which the inner diameter of the inner diameter transition section 213 gradually increases or decreases along a first straight direction. Taking the first way as an example, the cavity wall of the pressure regulating cavity 210 includes an inner diameter gradually expanding section, and when the adjusting rod 300 moves along the first linear direction, the extending end 310 of the adjusting rod 300 moves in the gradually expanding section along with the adjusting rod 300, so that the sectional area of the exhaust gap between the cavity wall of the pressure regulating cavity 210 and the outer peripheral surface of the extending end 310 gradually increases from 0, and the pressure relief value of the adjusting valve also increases accordingly.
In this embodiment, the gradual change section 213 is disposed on the cavity wall of the pressure regulating cavity 210 and/or the outer peripheral surface of the input end 310, and the adjusting rod 300 moves along the first linear direction, so as to adjust the sectional area of the exhaust gap, thereby simplifying the structure of the pressure regulating valve, simplifying the operation of adjusting the sectional area of the exhaust gap, and reducing the manufacturing cost of the pressure regulating section.
In some preferred embodiments, the wall of the pressure regulating chamber 210 includes an inner diameter transition section 213, the inner diameter transition section 213 is a tapered section extending along a first linear direction, a large diameter end of the tapered section is disposed far from the air inlet end 211, the extending end 310 is a round rod structure, and a diameter value of an outer peripheral surface of the extending end 310 is greater than a minimum diameter value of the inner diameter transition section 213.
In the preferred embodiment, the wall of the pressure-regulating chamber 210 includes an inner diameter transition 213, and the inner diameter transition 213 is a tapered section, and the large diameter end of the tapered section is disposed away from the air inlet end 211. The extending end 310 is a round rod structure and the tapered section are coaxially arranged, the diameter value of the outer peripheral surface of the extending end 310 is above the minimum diameter value of the inner diameter gradually-changing section 213, and the adjustment range of the sectional area of the exhaust gap can be adjusted to be 0 or above. For example, when the side of the outer peripheral surface of the extending end 310 close to the air inlet end 211 is completely contacted with the cavity wall of the pressure regulating cavity 210, the two parts are in a contact closed state, and the pressure regulating valve does not perform the pressure relief operation. In some other preferred embodiments, the adjustment rod 300 is a hollow round rod structure.
In this embodiment, the adjustment of the size of the cross-sectional area of the exhaust gap is realized by the cooperation between the tapered section and the round rod structure, and the structure of the pressure regulating valve can be further simplified.
In some preferred embodiments, the exhaust end 212 of the pressure regulating cavity 210 is disposed through the valve seat 200, and the pressure regulating valve further includes an exhaust pipe 900 disposed on the valve body 100, one end of the exhaust pipe 900 being connected to the exhaust end 212, and the other end being connected to the outside.
In the present embodiment, the pressure regulating chamber 210 is disposed through the valve seat 200 along a first straight line, and has an inlet end 211 at one end and an outlet end 212 at the other end. The exhaust pipe 900 has one end communicating with the exhaust end 212 and the other end communicating to the outside for exhausting a part of the sample gas to the outside environment. One end of the exhaust pipe 900 near the exhaust end 212 is fixedly connected to the exhaust end 212, and the other end can pass through the valve body 100 to the outside. In this embodiment, a portion of the sample gas exhausted from the exhaust end 212 can be collected in the tube through the exhaust tube 900 and then exhausted in a directional manner.
In some preferred embodiments, the valve seat 200 may preferably be a hollow conical valve seat 200, and the pressure regulating chamber 210 is an inner cavity of the conical valve seat 200.
In some preferred embodiments, a first guide ring 700 is disposed in the exhaust end 212, a through hole is disposed on a wall of the exhaust pipe 900, a second guide ring 800 is disposed in the through hole, and the adjusting rod 300 movably penetrates through the first guide ring 700 and the second guide ring 800.
In this embodiment, the exhaust end 212 is provided with a through hole penetrating through the tube wall, the through hole is provided with a second guide ring 800 therein, and an end of the adjusting rod 300 opposite to the extending end 310 movably penetrates through the second guide ring 800. The exhaust end 212 is provided with a first guide ring 700 therein, and the extending end 310 enters the pressure regulating cavity 210 by penetrating the first guide ring 700. The first guide ring 700, the second guide ring 800 and the adjustment lever 300 are coaxially disposed, so that the adjustment lever 300 can be always moved in the first linear direction. In addition, the second guide ring 800 has better sealing performance to prevent part of exhaust gas from leaking from the through hole.
As for the way of the partial sample gas discharged from the exhaust gap to the exhaust end 212 to flow into the exhaust pipe 900, for example, but not limited to: the guide ring is provided with air holes and the like which are communicated with the pressure regulating cavity 210 and the inner cavity of the exhaust pipe 900.
In some preferred embodiments, exhaust pipe 900 includes a first pipe segment 910 extending along a first linear direction and a second pipe segment 920 perpendicular to first pipe segment 910. An end of the first tube segment 910 proximate the discharge end 212 is disposed in communication with the discharge end 212. The second pipe section 920 is close to the first pipe section 910 and penetrates into the inner cavity of the first pipe section 910, and the other end penetrates through the valve body 100 to the outside. The through hole is located on an end of the first pipe section 910 remote from the inlet end 211.
In some preferred embodiments, the pressure regulating valve further comprises a thermal insulation sleeve 400, and the thermal insulation sleeve 400 is sleeved on a portion of the adjusting rod 300, which is different from the extending end 310.
In this embodiment, the heat insulation sleeve 400 is sleeved on a portion of the adjusting rod 300 different from the extending end 310, and is used for heat insulation of the sample gas to be measured in the adjusting rod 300, so as to improve the measurement accuracy of the smoke concentration measuring device. The heat insulation sleeve 400 can be preferably fixedly sleeved on the adjusting rod 300 to prevent the adjusting rod 300 from moving relative to the adjusting rod. The thermal insulation cover 400 is, for example, but not limited to, a thermal cotton cover or a vacuum thermal insulation cover 400.
When the exhaust pipe 900 is disposed at the exhaust end 212 and the adjusting rod 300 penetrates through the through hole of the exhaust pipe 900, an avoiding gap is formed between the end of the heat-insulating sleeve 400 close to the air inlet end 211 and the exhaust pipe 900, so as to prevent position interference between the heat-insulating sleeve 400 and the exhaust pipe 900 when the adjusting rod 300 moves.
In some preferred embodiments, the pressure regulating valve further comprises a sample inlet pipe joint 600, the sample inlet pipe joint 600 being mounted at the air inlet end 211.
In this embodiment, the sample tube adapter 600 is fixedly mounted on the valve seat 200, wherein the sample tube adapter 600 is coaxially disposed with the air inlet end 211. The pressure regulating valve may be connected to a sampling line through a sample line connection 600 when the pressure regulating valve is in use. A sealing ring is installed between the sampling pipe joint 600 and the air inlet end 211 to increase the sealing performance between the two.
In some preferred embodiments, a driving device 500 is further included, and the driving device 500 is in driving connection with the adjusting rod 300 to drive the adjusting rod 300 to move back and forth along the first linear direction.
In the present embodiment, the driving means 500 is mounted on the valve body 100 for driving the adjustment lever 300 to reciprocate in the first linear direction. The driving means 500 may preferably, but not limited to, an air cylinder, a hydraulic cylinder, a lead screw linear driving means 500, etc. Wherein, the driving head of the driving device 500 is fixedly connected to the adjusting lever 300.
In some preferred embodiments, a clamping plate 510 is fixedly connected to the driving head of the driving device 500, a clamping cavity for tightly clamping the thermal insulation sleeve 400 and the adjusting rod 300 is formed in the clamping plate 510, and the driving head of the driving device 500 can drive the thermal insulation sleeve 400 and the adjusting rod 300 to move through the clamping plate 510.
In some preferred embodiments, the valve body 100 includes a tubular body 110 and a support bracket 130 fixedly connected to the tubular body 110, and the driving device 500 is fixedly connected to the support bracket 130. The tubular body 110 includes a tube body and a cover 120 covering one end of the tube body, and the supporting frame 130 is fixedly connected to a side of the cover 120 away from the tubular body 110. The valve seat 200 is located in the inner cavity of the tubular body 110, the first segment 910 of the discharge tube is located in the inner cavity of the tubular body 110, and the second segment 920 penetrates through the side wall of the body. The end of the adjusting rod 300 far from the extending end 310 penetrates through the cover 120. The sample inlet pipe joint 600 penetrates through one end of the tubular main body 110 far away from the cover body 120.
The application still provides a smoke and dust concentration measurement device, including sampling pipeline and air-vent valve, the air-vent valve installation sets up in the sampling pipeline. The sampling pipeline comprises two sections of pipelines arranged along the conveying direction, namely a first pipeline and a second pipeline. The pressure regulating valve is positioned between the two sections of pipelines. The sample inlet pipe joint 600 of the pressure regulating valve is communicated with the tail end of the first sampling pipeline, and one end of the adjusting rod 300, which is far away from the air inlet end 211, is communicated with the head end of the second pipeline.
The present application further provides a control system for a pressure regulating valve, including the pressure regulating valve, still include:
the pressure sensor is arranged in the pressure regulating cavity 210 and positioned on one side of the extending end 310 away from the exhaust end 212, and is used for measuring the air pressure value at the position;
and a processor respectively connected with the pressure sensor and the driving device 500 in the pressure regulating valve, and used for controlling the driving device 500 to drive the adjusting rod 300 to move so as to increase the cross-sectional area of the exhaust gap when the air pressure value exceeds a preset air pressure threshold value.
In the present embodiment, the pressure sensor and the driving device 500 are electrically connected to the processor. The pressure sensor is disposed in the pressure regulating cavity 210 and located at a side of the input end 310 away from the exhaust end 212, for measuring the pressure value. When the air pressure value measured by the pressure sensor exceeds a preset air pressure threshold value, the pressure regulating valve is required to perform pressure relief processing, and the controller controls the driving device 500 to drive the adjusting rod 300 to move so as to increase the sectional area of the exhaust gap and realize pressure relief to a set value.
In some preferred embodiments, the processor obtains the displacement value of the adjusting rod 300 according to a preset matching rule according to the difference between the measured air pressure value and the air pressure threshold value, and then controls the driving device 500 to drive the adjusting rod 300 to move the displacement value, so that the adjusting valve can perform accurate pressure relief. Wherein the matching rule is a single positive mapping function relationship of the difference between the measured air pressure value and the air pressure threshold value and the displacement value of the adjustment lever 300.
It will be understood that the above-identified orientations or positional relationships, as referred to by the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, are based on the orientations or positional relationships illustrated in FIG. 2 and are intended merely to facilitate describing the invention and to simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be considered limiting of the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129835.6A CN112815127B (en) | 2019-11-18 | 2019-11-18 | Pressure regulating valve and control system thereof, and smoke concentration measuring device having the same |
Applications Claiming Priority (1)
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