CN112762187A - Self-operated constant pressure fluid device - Google Patents

Self-operated constant pressure fluid device Download PDF

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Publication number
CN112762187A
CN112762187A CN202110087246.7A CN202110087246A CN112762187A CN 112762187 A CN112762187 A CN 112762187A CN 202110087246 A CN202110087246 A CN 202110087246A CN 112762187 A CN112762187 A CN 112762187A
Authority
CN
China
Prior art keywords
valve
pressure
valve body
self
pneumatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110087246.7A
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Chinese (zh)
Inventor
黄志彬
黄志鹏
黄华龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Jiayi Fluid Intelligent Control Technology Co ltd
Original Assignee
Hunan Jiayi Fluid Intelligent Control Technology Co ltd
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Publication date
Application filed by Hunan Jiayi Fluid Intelligent Control Technology Co ltd filed Critical Hunan Jiayi Fluid Intelligent Control Technology Co ltd
Priority to CN202110087246.7A priority Critical patent/CN112762187A/en
Publication of CN112762187A publication Critical patent/CN112762187A/en
Withdrawn legal-status Critical Current

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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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • F16K3/262—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member with a transverse bore in the valve member
    • 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
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • 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
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • 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
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths

Abstract

The invention discloses a self-operated constant-pressure fluid device, which comprises a valve body, a pneumatic actuator, a pneumatic valve positioner and an automatic controller, wherein the liquid inlet end of the valve body is connected with a medium main pipeline, a valve core is arranged in the valve body, a valve seat for installing the valve core is arranged in the valve body, the top of the valve seat is connected with a flow window supporting frame for medium in the valve body to flow out, the valve core is connected with a valve rod for controlling the movement of the valve core, and a supporting assembly for the stable movement of the valve core is arranged in the valve body. The multiple pressure reducing structures can improve the adjusting precision and the stability of the valve body.

Description

Self-operated constant pressure fluid device
Technical Field
The invention relates to the technical field of water treatment, in particular to a self-operated constant-pressure fluid device.
Background
The steel industry or the coal chemical industry are equipped with a hot rolling circulating water treatment system during production, and a constant pressure device is required to be used in the circulating water treatment system to ensure the flowing stability of fluids such as water. In order to achieve the purposes of improving the yield and reducing the cost during production, a new production line needs to be added to the original system, and meanwhile, the product model is converted into a plurality of product specifications from a single product specification, so that the constant technical parameters of the original system design have new changes, and a self-operated constant-pressure fluid device with automatic constant main pipe pressure needs to be added to the main pipeline to ensure the safe and effective operation of the whole system.
In order to solve the above problems, a self-operated constant pressure fluid device is proposed.
Disclosure of Invention
The present invention is directed to a self-operated constant pressure fluid device to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
the self-operated constant-pressure fluid device comprises a valve body, a pneumatic actuator, a pneumatic valve positioner and an automatic controller, wherein the liquid inlet end of the valve body is connected with a main medium pipeline, a valve core is arranged in the valve body, a valve seat for installing the valve core is arranged in the valve body, the top of the valve seat is connected with a flow window supporting frame for medium in the valve body to flow out, the valve core is connected with a valve rod for controlling the movement of the valve core, and a supporting assembly for the stable movement of the valve core is arranged in the valve body;
the top of the valve body is connected with a mounting frame, one side, far away from the valve body, of the mounting frame is connected with a pneumatic actuator used for controlling the movement of a valve rod, a pneumatic valve positioner is mounted in the mounting frame, a signal control output end of the pneumatic valve positioner is electrically connected with the pneumatic actuator through a pneumatic valve positioner output signal pipe, a control input end of the pneumatic valve positioner is electrically connected with an automatic controller through an automatic controller air source pressure signal output pipe, a signal acquisition end of the automatic controller is connected with a main pipeline medium pressure signal acquisition pipe, and a pressure signal acquisition end, far away from the automatic controller, of the main pipeline medium pressure signal acquisition pipe is connected with a main medium pipeline;
the valve core is provided with a secondary pressure reducing structure for pressure balance of the inner cavity of the valve body, the valve seat is provided with a primary pressure reducing structure for reducing pressure when a medium flows, and the flow window support frame is provided with a tertiary pressure reducing structure for reducing pressure and reducing noise when the medium flows.
Preferably, one side of the valve body close to the mounting frame is connected with a valve cover, and one side of the valve cover close to the inner cavity of the valve body is provided with a guide structure for stable movement of the valve rod.
Preferably, the support assembly comprises a valve sleeve, the valve sleeve is connected to one side, far away from the valve seat, of the flow window support frame, one side, far away from the flow window support frame, of the valve sleeve is connected to one side, close to the guide structure, of the valve cover, and the outer wall of the valve core is in sliding connection with the valve sleeve and the inner wall of the valve seat.
Preferably, the pneumatic actuator comprises a diaphragm, the diaphragm is arranged in a cylinder body of the pneumatic actuator and connected with the input end of the valve rod, one side, far away from the valve rod, of the diaphragm is connected with a single spring structure, and the cylinder body is formed by aluminum alloy in a die-casting mode.
Preferably, the automatic controller comprises a box body and an aluminum plate installed in the box body, the aluminum plate is provided with a main pressure signal receiving structure, a rated pressure setting structure, a balance pull rod structure and an output signal conversion structure, the main pressure signal receiving structure comprises a U-shaped hydraulic cylinder body, a gauge needle and a main transmission structure for driving the gauge needle to rotate, the output end of the U-shaped hydraulic cylinder body is connected with the balance pull rod structure of the rated pressure and the main actual pressure, the output end of the balance pull rod structure of the rated pressure and the main actual pressure is connected with the main transmission structure, the gauge needle is installed on a display meter of the rated pressure and the actual pressure, the rated pressure signal end of the balance pull rod structure of the rated pressure and the main actual pressure is connected with the rated pressure setting structure, and the external force change value signal output end of the balance pull rod structure of the rated pressure and the main actual pressure is connected with an air source regulating valve through, the air source regulating valve) air outlet end is connected with an automatic pressure regulating valve arranged in the box body, and the pressure signal output end of the automatic pressure regulating valve is connected with an air source pressure signal output pipe of the automatic controller.
Preferably, be equipped with valve chamber constant voltage structure in the case, the case includes mounting panel, epitheca and inferior valve, install the valve rod on the mounting panel, valve chamber constant voltage structure is including setting up a plurality of constant voltage hole on the mounting panel.
Preferably, the second grade decompression structure includes a plurality of groups of through-holes, the through-hole setting is evenly arranged on the lateral wall that the inferior valve is close to mounting panel one end.
Preferably, one-level pressure reduction structure is including setting up a plurality of groups feed ports of keeping away from mounting panel one end lateral wall at the disk seat, the opening that mounting panel one end was kept away from to the disk seat is established for sealedly, inferior valve outer wall sliding connection disk seat inner wall, the one end outer wall that the through-hole was not established to the inferior valve cooperatees with the one end lateral wall that the disk seat was equipped with the feed port.
Preferably, tertiary decompression structure is including setting up a plurality of groups discharge opening at flow window support frame lateral wall, the discharge opening evenly sets up on flow window support frame lateral wall, the one end outer wall that is equipped with the through-hole on the inferior valve cooperatees with the discharge opening and uses.
Compared with the prior art, the invention has the beneficial effects that:
the automatic controller is arranged, so that pressure signals in a medium main pipeline can be accurately received, the U-shaped hydraulic cylinder body mainly receives external force changes and accurately transmits the external force changes to the lever balance structure, the gauge needle and main pipeline transmission structure can directly reflect external force change values on the pressure gauge and effectively and accurately transmit the external force change values, constant air source signals are transmitted to the pneumatic valve positioner, the pneumatic actuator can conveniently work, and the automatic controller has the function of automatically keeping the main pipeline pressure constant;
the pneumatic actuator is internally provided with a diaphragm and single spring structure, so that the sensitivity of the actuator can be improved, the actuator can quickly respond when the pressure in the cylinder body slightly changes, and the cylinder body is designed to be integrally formed by aluminum alloy in a die-casting manner, so that the pressure resistance effect can be improved, and the service life of the device can be prolonged;
through setting up a plurality of decompression structures, can improve the regulation precision and the stability ability of valve body, noise when can reducing large-traffic medium and flow, the operating personnel of being convenient for maintains and operates at the workplace.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the operation of the medium when the valve body is fully closed.
FIG. 3 is a schematic structural diagram of the automatic controller of the present invention.
FIG. 4 is a schematic structural diagram of the assembly of the aluminum plate in the automatic controller of the present invention.
FIG. 5 is a schematic diagram of the operation of the medium when the valve body is fully opened.
Fig. 6 is a schematic structural view of the valve core assembly of the present invention.
FIG. 7 is a top view of the mounting plate of the present invention.
FIG. 8 is a schematic diagram of a two-stage pressure reduction structure in accordance with the present invention.
FIG. 9 is a schematic view of a primary pressure reducing structure according to the present invention.
FIG. 10 is a schematic top view of a primary pressure relief structure according to the present invention.
FIG. 11 is a schematic view of a three-stage pressure reduction structure according to the present invention.
FIG. 12 is a schematic top view of a three-stage pressure relief structure according to the present invention.
In the figure: 11- -valve body, 12- -pneumatic actuator, 13- -pneumatic valve positioner, 14- -automatic controller, 15- -automatic controller air source pressure signal output pipe, 16- -main pipe medium pressure signal acquisition pipe, 17- -main medium pipe, 18- -pneumatic valve positioner output signal pipe, 19- -valve cover, 20- -guide structure, 21- -valve rod, 22- -valve cover, 23- -valve core, 24- -flow window support frame, 25- -valve seat, 26- -rated pressure and actual air source overflow valve pressure display meter, 27- -air source overflow valve, 28- -automatic pressure regulating valve, 29- -air source regulating valve, 30- -rated pressure setting structure, 31-a balance pull rod structure of rated pressure and actual pressure of a main pipe, 32-a main pipe transmission structure, 33-a main pipe pressure signal receiving structure, 34-a valve cavity constant pressure structure, 35-a secondary pressure reducing structure, 36-a primary pressure reducing structure and 37-a tertiary pressure reducing structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 12, in the embodiment of the present invention, a self-operated constant pressure fluid device includes a valve body 11, a pneumatic actuator 12, a pneumatic valve positioner 13, and an automatic controller 14, a medium main pipe 17 is connected to a liquid inlet end of the valve body 11, a valve core 23 is disposed in the valve body 11, a valve seat 25 for mounting the valve core 23 is disposed in the valve body 11, a flow window support frame 24 for medium in the valve body 11 to flow out is connected to a top of the valve seat 25, the valve core 23 is connected to a valve rod 21 for controlling the movement of the valve core 23, and a support assembly for stable movement of the valve core 23 is disposed in the valve;
the top of the valve body 11 is connected with a mounting frame, one side, far away from the valve body 11, of the mounting frame is connected with a pneumatic actuator 12 used for controlling the movement of a valve rod 21, a pneumatic valve positioner 13 is mounted in the mounting frame, the signal control output end of the pneumatic valve positioner 13 is electrically connected with the pneumatic actuator 12 through a pneumatic valve positioner output signal pipe 18, the control input end of the pneumatic valve positioner 13 is electrically connected with an automatic controller 14 through an automatic controller air source pressure signal output pipe 15, the signal acquisition end of the automatic controller 14 is connected with a main pipeline medium pressure signal acquisition pipe 16, and the pressure signal acquisition end, far away from the automatic controller 14, of the main pipeline medium pressure signal acquisition pipe 16 is connected with a main medium pipeline 17;
the valve core 23 is provided with a secondary pressure reducing structure 35 for pressure balance of the inner cavity of the valve body 11, the valve seat 25 is provided with a primary pressure reducing structure 36 for reducing pressure when a medium flows, and the flow window support frame 24 is provided with a tertiary pressure reducing structure 37 for reducing pressure and reducing noise when the medium flows; during the in-service use, a plurality of decompression structures can improve the regulation precision and the stability ability of valve body 11, can reduce the noise when large-traffic medium flows, and the operating personnel of being convenient for maintains and operates at the workplace.
Valve gap 19 is connected to one side that valve body 11 is close to the mounting bracket, valve gap 19 is close to one side of valve body 11 inner chamber and is equipped with guide structure 20 that is used for valve rod 21 steady motion.
The support assembly comprises a valve sleeve 22, the valve sleeve 22 is connected to one side of a flow window support frame 24 far away from a valve seat 25, one side of the valve sleeve 22 far away from the flow window support frame 24 is connected to one side of a valve cover 19 close to the guide structure 20, and the outer wall of the valve core 23 is in sliding connection with the valve sleeve 22 and the inner wall of the valve seat 25.
The pneumatic actuator 12 comprises a diaphragm, the diaphragm is arranged in a cylinder body of the pneumatic actuator 12 and is connected with the input end of the valve rod 21, one side, far away from the valve rod 21, of the diaphragm is connected with a single spring structure, and the cylinder body is formed by aluminum alloy through die casting; the diaphragm adds the single spring structure, can improve the sensitivity of executor, and the pressure changes the executor a little in the cylinder body and will respond rapidly, and the whole aluminum alloy die-casting shaping of cylinder body design can improve withstand voltage effect, improves device life.
Automatic controller 14 includes the box body and installs the aluminum plate in the box body, aluminum plate installs and is responsible for pressure signal receiving structure 33, rated pressure and is responsible for balanced pull rod structure 31 and output signal transform structure of actual pressure, it includes U type hydraulic cylinder body, table needle and drive table needle pivoted and is responsible for transmission structure 32 to be responsible for pressure signal receiving structure 33, rated pressure and the balanced pull rod structure 31 of being responsible for actual pressure are connected to U type hydraulic cylinder body output, rated pressure and the balanced pull rod structure 31 output of being responsible for actual pressure are connected and are responsible for transmission structure 32, the table needle is installed on rated pressure and actual pressure display table 26, rated pressure and the rated pressure signal end of the balanced pull rod structure 31 of being responsible for actual pressure are connected rated pressure and are set for structure 30, rated pressure and the external force variation value signal output of the balanced pull rod structure 31 of being responsible for actual pressure pass through air supply overflow The valve 27 is connected with an air source regulating valve 29, the air outlet end of the air source regulating valve 29 is connected with an automatic pressure regulating valve 28 arranged in the box body, and the pressure signal output end of the automatic pressure regulating valve 28 is connected with an air source pressure signal output pipe 15 of the automatic controller;
during actual use, a constant pressure value can be set by using the rated pressure setting structure 30, the constant pressure value and the specified constant pressure of the main pipe form a lever far away, the two values are equivalent, the system is in a balanced state, when the medium pressure of the pipeline exceeds the specified pressure, the U-shaped hydraulic cylinder body receives external force change and accurately transmits the external force change to the balance pull rod structure 31 of the rated pressure and the actual pressure of the main pipe, the balance pull rod structure controls the main pipe transmission structure 32 to work, the control gauge needle rotates to directly reflect the external force change value on the pressure gauge and effectively and accurately transmit the external force change value, the balance pull rod structure transmits the external force change value to the air source regulating valve 29 to regulate the air source flow, the automatic pressure regulating valve 28 stably regulates the received flow change value controlled by the air source regulating valve 29, then transmits the constant air source signal to the pneumatic valve positioner 13, and the automatic controller 14 can automatically and accurately convert the change value of the medium pressure into the flow value required by The signal is convenient for the work of the pneumatic actuator 12, and has the function of automatically keeping the pressure of the main pipe constant.
The valve core 23 is internally provided with a valve cavity constant pressure structure 34, the valve core comprises a mounting plate, an upper shell and a lower shell, the mounting plate is provided with a valve rod 21, and the valve cavity constant pressure structure 34 comprises a plurality of constant pressure holes arranged on the mounting plate; when the valve body 11 is closed and the medium is not circulated, the constant pressure hole can enable the medium to flow into the inner cavity of the valve sleeve 22, so that the pressure balance of the inner cavity of the valve body 11 is kept;
the secondary decompression structure 35 comprises a plurality of groups of through holes, and the through holes are uniformly distributed on the side wall of one end of the lower shell close to the mounting plate; the primary pressure reducing structure 36 comprises a plurality of groups of feeding holes arranged on the side wall of one end, far away from the mounting plate, of the valve seat 25, the opening, far away from the mounting plate, of the valve seat 25 is sealed, the outer wall of the lower shell is in sliding connection with the inner wall of the valve seat 25, and the outer wall of one end, without the through hole, of the lower shell is matched with the side wall of one end, provided with the feeding holes, of the; the three-stage pressure reducing structure 37 comprises a plurality of groups of discharge holes arranged on the side wall of the flow window supporting frame 24, the discharge holes are uniformly arranged on the side wall of the flow window supporting frame 24, and the outer wall of one end of the lower shell, which is provided with the through hole, is matched with the discharge holes for use; when valve rod 21 drives case 23 and moves to 19 one side of being close to valve gap, the medium can get into the inferior valve inner chamber after the feed port on the disk seat 25 gets into the disk seat 25 inner chamber, and the medium can flow into the inferior valve outside through the discharge opening outflow of 24 lateral walls of flow window support frame through the through-hole on the inferior valve, and the poor problem of regulating accuracy when the heavy-calibre can be solved in the setting of a plurality of holes, can the noise abatement, improves the regulating accuracy, improves the stability that the medium flows in the valve body 11.
The working principle of the invention is as follows: when the self-operated constant-pressure fluid device is used, the automatic controller 14 is provided with a constant pressure value, the constant pressure value is far away from a lever and is equivalent to the specified constant pressure of the main pipe, the system is in a balanced state, when the medium pressure of a pipeline exceeds the specified pressure, the value quickly breaks the balanced state, the automatic controller 14 quickly adjusts the external force, the pressure signal value of an air source transmitted to the pneumatic valve positioner 13 by the automatic controller 14 is increased, the pneumatic valve positioner 13 receives the pressure signal to quickly adjust the pressure of a main air source (the air source enters the pneumatic actuator 12), when receiving the pressure increase signal, the pneumatic actuator 12 quickly operates to drive the valve rod 21 to move upwards, the valve core 23 of the valve body 11 is automatically opened, and the additional fluid in the main medium pipeline 17 flows out through the valve body 11 to be reduced to the set rated pressure value; and when the pipeline pressure is lower than the rated value, the working principle is the same, the running direction of each component is just opposite to the above, and finally the aim is to realize the constant medium pressure rated value.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. Self-operated constant pressure fluid device, including valve body (11), pneumatic actuator (12), pneumatic valve locator (13) and automatic control ware (14), its characterized in that: the liquid inlet end of the valve body (11) is connected with a medium main pipeline (17), a valve core (23) is arranged in the valve body (11), a valve seat (25) used for installing the valve core (23) is arranged in the valve body (11), the top of the valve seat (25) is connected with a flow window supporting frame (24) used for flowing out of a medium in the valve body (11), the valve core (23) is connected with a valve rod (21) used for controlling the movement of the valve core (23), and a supporting assembly used for stably moving the valve core (23) is arranged in the valve body (11);
the top of the valve body (11) is connected with a mounting frame, one side, far away from the valve body (11), of the mounting frame is connected with a pneumatic actuator (12) used for controlling the movement of a valve rod (21), a pneumatic valve positioner (13) is installed in the mounting frame, the signal control output end of the pneumatic valve positioner (13) is electrically connected with the pneumatic actuator (12) through a pneumatic valve positioner output signal pipe (18), the control input end of the pneumatic valve positioner (13) is electrically connected with an automatic controller (14) through an automatic controller air source pressure signal output pipe (15), the signal acquisition end of the automatic controller (14) is connected with a main pipeline medium pressure signal acquisition pipe (16), and the pressure signal acquisition end, far away from the automatic controller (14), of the main pipeline medium pressure signal acquisition pipe (16) is connected with a main pipeline medium (17);
the valve core (23) is provided with a secondary decompression structure (35) for pressure balance of an inner cavity of the valve body (11), the valve seat (25) is provided with a primary decompression structure (36) for decompressing when a medium flows, and the flow window support frame (24) is provided with a tertiary decompression structure (37) for decompressing and reducing noise when the medium flows.
2. The self-operated constant pressure fluid apparatus as claimed in claim 1, wherein: valve gap (19) is connected to one side that valve body (11) are close to the mounting bracket, valve gap (19) are close to one side of valve body (11) inner chamber and are equipped with guide structure (20) that are used for valve rod (21) steady motion.
3. The self-operated constant pressure fluid apparatus as claimed in claim 2, wherein: the supporting component comprises a valve sleeve (22), the valve sleeve (22) is connected to one side, away from a valve seat (25), of a flow window supporting frame (24), one side, away from the flow window supporting frame (24), of the valve sleeve (22) is connected to one side, close to a guide structure (20), of a valve cover (19), and the outer wall of a valve core (23) is connected with the inner walls of the valve sleeve (22) and the valve seat (25) in a sliding mode.
4. The self-operated constant pressure fluid apparatus as claimed in claim 1, wherein: pneumatic actuator (12) include the diaphragm, the diaphragm sets up in the cylinder body of pneumatic actuator (12) and is connected with valve rod (21) input, the diaphragm is kept away from valve rod (21) one side and is connected with the single spring structure, the cylinder body is the aluminum alloy die-casting shaping.
5. The self-operated constant pressure fluid apparatus as claimed in claim 1, wherein: automatic controller (14) include the box body and install the aluminum plate in the box body, aluminum plate installs and is responsible for pressure signal receiving structure (33), rated pressure and is responsible for balanced pull rod structure (31) and the output signal transform structure of actual pressure, be responsible for pressure signal receiving structure (33) and include U type hydraulic cylinder body, table needle and drive table needle pivoted and be responsible for transmission structure (32), U type hydraulic cylinder body output is connected rated pressure and is responsible for balanced pull rod structure (31) of actual pressure, rated pressure and be responsible for balanced pull rod structure (31) output connection of actual pressure and be responsible for transmission structure (32), the table needle is installed on rated pressure and actual pressure display meter (26), rated pressure and the rated pressure signal end connection rated pressure of the balanced pull rod structure (31) of being responsible for actual pressure set up structure (30), the external force change value signal output end of the balance pull rod structure (31) with the rated pressure and the actual pressure of the main pipe is connected with the air source regulating valve (29) through the air source overflow valve (27), the air outlet end of the air source regulating valve (29) is connected with the automatic pressure regulating valve (28) arranged in the box body, and the pressure signal output end of the automatic pressure regulating valve (28) is connected with the air source pressure signal output pipe (15) of the automatic controller.
6. The self-operated constant pressure fluid apparatus as claimed in claim 1, wherein: be equipped with valve pocket constant voltage structure (34) in case (23), the case includes mounting panel, epitheca and inferior valve, install valve rod (21) on the mounting panel, valve pocket constant voltage structure (34) are including setting up a plurality of constant voltage hole on the mounting panel.
7. The self-operated constant pressure fluid apparatus as claimed in claim 6, wherein: and the secondary decompression structure (35) comprises a plurality of groups of through holes, and the through holes are uniformly distributed on the side wall of the lower shell close to one end of the mounting plate.
8. The self-operated constant pressure fluid apparatus as claimed in claim 7, wherein: one-level decompression structure (36) are including setting up a plurality of groups feed ports of keeping away from mounting panel one end lateral wall at disk seat (25), the opening that mounting panel one end was kept away from in disk seat (25) is established for sealedly, inferior valve outer wall sliding connection disk seat (25) inner wall, the one end outer wall that the through-hole was not established to the inferior valve cooperatees with the one end lateral wall that disk seat (25) was equipped with the feed port.
9. The self-operated constant pressure fluid apparatus as claimed in claim 8, wherein: tertiary decompression structure (37) is including setting up a plurality of groups discharge opening at flow window support frame (24) lateral wall, the discharge opening evenly sets up on flow window support frame (24) lateral wall, the one end outer wall that is equipped with the through-hole on the inferior valve cooperatees with the discharge opening and uses.
CN202110087246.7A 2021-01-22 2021-01-22 Self-operated constant pressure fluid device Withdrawn CN112762187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110087246.7A CN112762187A (en) 2021-01-22 2021-01-22 Self-operated constant pressure fluid device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110087246.7A CN112762187A (en) 2021-01-22 2021-01-22 Self-operated constant pressure fluid device

Publications (1)

Publication Number Publication Date
CN112762187A true CN112762187A (en) 2021-05-07

Family

ID=75705621

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110087246.7A Withdrawn CN112762187A (en) 2021-01-22 2021-01-22 Self-operated constant pressure fluid device

Country Status (1)

Country Link
CN (1) CN112762187A (en)

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