CN106763960B - Piston type axial flow pressure regulator - Google Patents
Piston type axial flow pressure regulator Download PDFInfo
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- CN106763960B CN106763960B CN201710164036.7A CN201710164036A CN106763960B CN 106763960 B CN106763960 B CN 106763960B CN 201710164036 A CN201710164036 A CN 201710164036A CN 106763960 B CN106763960 B CN 106763960B
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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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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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
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/128—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like servo actuated
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a piston type axial flow pressure regulator, which mainly comprises an axial flow regulating valve, a pressure regulating controller and a group of signal tubes connected with the pressure regulating controller. The remarkable structural characteristics are as follows: the separated flow passage, throttling depressurization and guide mechanism functional components are designed in the axial flow regulating valve according to the 'separation principle'. The cylinder sleeve is embedded between the valve seat and the valve sleeve to form an annular flow channel, the piston is slidably matched in the cylinder sleeve to perform pressure regulating and stabilizing operation, the piston is ensured to only receive axial push-pull acting force when sliding in the cylinder sleeve, the defects of large flow resistance, large vibration and high noise caused by the fact that the traditional regulating valve 'a lower inlet and an upper outlet meander type flow channel' easily generates turbulent flow are well overcome, and the technical effects of further improving the pressure regulating precision and the pressure regulating stability are very obvious. The invention has the outstanding advantages of simple structure, easy production, low manufacturing cost, high pressure regulating precision, good output air pressure stability, safe and reliable operation and long service life, and has excellent popularization and application prospect.
Description
Technical Field
The invention relates to a gas pressure regulator device, in particular to a piston type axial flow pressure regulator, which belongs to the technical field of pressure regulating and stabilizing of a gas transmission pipe network and is particularly suitable for being arranged on a pipeline of a natural gas, liquefied gas and CNG (compressed natural gas) pressure regulating station to carry out pressure regulating and stabilizing operation.
Background
The gas pressure regulator is a special device which is arranged on a gas transmission pipeline to regulate pressure and provide a pressure stable gas source for a downstream pipeline or a pipe network. The most common voltage regulator used at present is mostly composed of a main voltage regulator, a director and a signal tube connected with the director, and the working principle is as follows: the pressure signal in the downstream gas transmission pipeline is led into the commander through the signal pipe, the commander changes the opening degree according to the led-in pressure signal, so that the gas flow input into the membrane chamber of the main pressure regulator is increased or reduced, and the pressure balance state of the membrane chamber of the main pressure regulator is changed to drive the membrane of the main pressure regulator to move so as to drive the valve core to move, so that the output pressure can be stably regulated within an allowable rated pressure range. In the current pressure regulator production industry, mostly, the assembly uses the governing valve of "being the meander formula runner structure of going into from top to bottom in the valve chamber", its basic structure is: in the pressure regulating process, the displacement direction of the regulating valve core is vertical to the axis of the gas pipeline. Although the regulating valve has the advantages of simple structure, low production cost and convenient installation and maintenance, the turbulent flow phenomenon is easily generated because the medium moves in the valve cavity of the regulating valve in a mode of 'going in and out from the lower part and going out along the tortuous flow type flow passage'. The technical defects of high air transmission flow resistance, large medium pressure loss, poor dynamic stability of operation and large vibration noise exist in the actual operation of the air conditioner. In a practical aspect, the regulating valve with the structure of the zigzag flow passage with the lower inlet and the upper outlet still has some technical defects when the pressure regulating operation is carried out on a natural gas pipeline of a large-flow gathering and transporting pipeline or a branch transporting station. At present, attempts have been made in the natural gas transmission and distribution industry to adopt an axial flow valve as a pressure regulating device on a gas transmission pipeline with high demand on gathering and transportation technical performance. The basic structure of the existing axial flow valve is characterized in that: the valve cavity is internally provided with an annular flow passage which is coaxial with the axis of the gas pipeline, and the annular flow passage is named because the displacement direction of the regulating valve core and the movement direction of the medium are coaxial with the axis of the gas pipeline. Because it has the good working performance of large air transmission flow, low flow resistance, small pressure loss and good dynamic stability, it is especially suitable for being installed on the air transmission pipeline with higher requirement on gathering and transportation technical performance to carry out pressure regulation operation. We have also found in long-term research and development of voltage regulator products and market research: at present, a domestic or imported axial flow valve product adopting a diaphragm structure is also used as a configuration of a pressure regulator, but the imported axial flow valve product has the defects of extremely high cost, expensive maintenance, high engineering cost and use cost of a user, untimely after-sale service and the like; the basic structure of the existing axial flow valve is as follows: the convex ring of the outer wall of the adjusting sleeve is fixedly embedded and connected with the membrane tray, the inner hole of the adjusting sleeve is a medium flow passage, the outer wall of the adjusting sleeve is used for sliding guide, and the cylinder end of the adjusting sleeve is used for throttling and pressure regulating. The pressure regulator with the regulating sleeve integrating the flow passage, guiding and throttling pressure regulating functions still has the following technical structural defects in actual production and field use: first, since the inner bore of the adjusting sleeve is a flow channel as large as the caliber of the main valve, the spring can only be installed outside the adjusting sleeve, which results in the increase of the diameter of the spring, which will greatly increase the manufacturing difficulty and production cost of the spring, and the working stability of the spring will also be reduced, which will seriously affect the pressure regulating precision and pressure regulating stability of the pressure regulator. Secondly, the coaxiality is reduced along with the longer stroke of the adjusting sleeve and the spring, the requirement on the processing technology is extremely high, and otherwise, the pressure regulating precision and the pressure regulating stability of the pressure regulator are influenced. Thirdly, the multi-stage pressure reduction design cannot be carried out on the throttling part, and particularly under the extreme working conditions of large pressure difference and small flow, when the gas flow speed is increased due to the fact that the opening degree of a valve port is too small, high-speed airflow can form a serious erosion effect on the throttling part to be quickly damaged and fail. Fourthly, because the pressure regulating device adopts a part integrating multiple functions of 'flow channel, guiding, throttling and pressure reducing', the working environment is extremely severe, the pressure regulating device is easy to erode and damage, when the regulating sleeve needs to be maintained and replaced, the diaphragm tray needs to be disassembled, the maintenance operation is very troublesome, and particularly, the maintenance operation on a large-caliber pressure regulator is labor-consuming and high in maintenance cost. The invention is a problem that the existing axial flow type pressure regulator product needs further improvement and perfection, and the invention is to solve the technical problem.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a piston type axial flow pressure regulator which is designed by separating an axial flow channel, a guide mechanism and a throttling and pressure reducing structure in an axial flow regulating valve and has extremely high pressure regulating precision and pressure regulating stability.
The purpose of the invention is realized by the following technical scheme:
the invention provides a piston type axial flow pressure regulator, which comprises an axial flow regulating valve, a pressure regulating controller KZ, a front pressure signal pipe, a rear pressure signal pipe, a main pressure regulating signal pipe and a return pipe which are connected with the pressure regulating controller KZ, wherein the pressure regulating controller KZ consists of a command valve and a pressure stabilizing valve, the command valve comprises a lower valve body, a middle valve body, an upper valve body, a command regulating spring, a command nut and a command regulating screw rod in threaded connection with the command nut, a command diaphragm assembly is assembled between the upper valve body and the middle valve body to form a command lower diaphragm cavity, a rear pressure air inlet channel and a rear pressure air outlet channel which are communicated with the command lower diaphragm cavity are arranged in the middle valve body, a base is connected and installed on the command diaphragm assembly through a command bolt, the command regulating spring is supported between the base and the pressure spring plate, the bottom end of the command regulating screw rod abuts against the pressure spring plate, a command air chamber, a throttling air outlet cavity and a throttling air outlet channel which are communicated with the command air chamber are arranged in the middle valve body, the commanding air chamber is internally provided with a commanding throttle clack and a commanding throttle spring supported on the commanding throttle clack, a commanding air inlet channel communicated with the commanding air chamber is arranged in the wall body of the lower valve body, the pressure stabilizing valve comprises a pressure stabilizing valve body, a pressure stabilizing valve cover, a pressure stabilizing adjusting spring and a pressure stabilizing adjusting screw rod in threaded connection with the pressure stabilizing valve cover, a pressure stabilizing membrane assembly is arranged between the pressure stabilizing valve cover and the pressure stabilizing valve body and is divided into a pressure stabilizing upper membrane cavity and a pressure stabilizing lower membrane cavity, a back pressure introducing channel communicated with the pressure stabilizing upper membrane cavity is arranged in the wall body of the pressure stabilizing valve cover, the pressure stabilizing adjusting spring is supported between the pressure stabilizing membrane assembly and the pressure stabilizing plate, the bottom end of the pressure stabilizing adjusting screw rod is abutted against the pressure stabilizing plate, a pressure stabilizing adjusting air passage and a pressure stabilizing air chamber communicated with the pressure stabilizing lower membrane cavity are arranged in the pressure stabilizing valve body, the pressure stabilizing throttle clack and the pressure stabilizing throttle spring supported on the pressure stabilizing throttle clack are arranged in the pressure stabilizing air chamber, the pressure stabilizing valve is fixedly connected and installed on the lower valve body and the middle valve body of the command valve through connecting bolts, a back pressure introducing channel and a pressure stabilizing adjusting air passage of the pressure stabilizing valve are respectively butted with a back pressure air outlet channel and a command air inlet channel of the command valve to form a closed communicated butt joint air passage structure, the axial flow adjusting valve comprises a main valve body, a left valve body and a right valve cover which are installed at two ends of the main valve body, and a valve seat and a valve sleeve which are assembled in the main valve body, and the axial flow adjusting valve is characterized in that: the pressure regulating valve is characterized in that a cylinder sleeve is fixedly embedded between a valve seat and a valve sleeve and is divided into an annular axial flow channel, a group of throttling windows communicated with the inlet end of the annular axial flow channel is arranged on the wall body of the cylinder sleeve, a group of inclined air outlets communicated with the outlet end of the annular axial flow channel are arranged on the wall body of the cylinder sleeve, a cylinder inner cavity is formed by sliding and matching pistons in the cylinder sleeve, a pressure regulating valve rod is fixedly connected and arranged on the piston, a group of left disc air passage holes and right disc air passage holes communicated with an air outlet cavity are correspondingly arranged between a right valve cover and a main valve body, the left end of the left disc is sleeved on the inner wall surface of the valve sleeve, the right end of the right disc is sleeved on the inner wall surface of the air outlet cavity of the right valve cover, the air inlet end of a front pressure signal pipe is fixedly connected and arranged on the left valve body of the axial flow regulating valve and is communicated with the air outlet cavity, the backflow end of a front pressure signal pipe is fixedly connected and arranged on the pressure stabilizing valve body, the backflow end of the backflow pipe is connected and communicated with the output end of a main pressure regulating valve connected with the pressure regulating valve body of a pressure regulating valve. It has the remarkable structural characteristics that: 1, embedding a cylinder sleeve between a valve seat and a valve sleeve which are assembled in an axial flow regulating valve to separate the valve seat and the valve sleeve into an annular flow passage structure; 2, a piston is slidably matched in the cylinder sleeve, and a group of throttling windows on the wall body of the cylinder sleeve form a throttling pressure regulating structure at the inlet end of the annular channel; the left end sleeve of the left tray of the pressure regulating diaphragm is matched with the inner wall surface of the valve sleeve in a sliding way, and the right end sleeve of the right tray is matched with the inner wall surface of the air outlet cavity of the right valve cover in a sliding way to form a guide mechanism separated from a throttling and pressure regulating structure; and 4, a pressure regulating valve rod is connected and installed between the piston and a left tray and a right tray which are used for clamping the pressure regulating membrane to form a driving mechanism for pushing the piston in an axial direction, and the brand new structural design can ensure that the piston only receives the pushing and pulling acting force in the axial direction when sliding left and right in the cylinder sleeve to perform throttling and pressure regulating operation, so that the piston has good positioning and guiding performance. The regulating valve overcomes the use defects of large flow resistance, large vibration and high noise caused by the fact that the traditional regulating valve 'a lower inlet and an upper outlet meander type flow channel' is easy to generate turbulent flow, and has very obvious technical effects on further improving the pressure regulating precision and the pressure regulating stability.
Furthermore, it has the following technical characteristics:
the cylinder sleeve is internally provided with a pressure regulating spring for supporting the piston. The structural design of assembling the pressure regulating spring in the cylinder sleeve greatly reduces the diameter of the pressure regulating spring, reduces the manufacturing difficulty and the production cost of the pressure regulating spring, can obviously improve the working stability of the pressure regulating spring, can effectively buffer the push-pull acting force on the piston so as to enhance the stability of the piston sliding left and right in the cylinder sleeve, and has certain technical effects of further improving the pressure regulating precision and the pressure regulating stability of the pressure regulator.
The left end of the piston is fixedly connected with a mounting pressing plate through a screw to form an embedding structure for press-mounting the sealing ring, and a hard alloy ring is arranged on the right end face of the valve seat in a surfacing mode at a position corresponding to the press-mounted sealing ring. The purpose of the structural design is to form a closed sealing pair structure of the axial flow regulating valve by the press-mounted sealing ring and the hard alloy ring on the right end face of the valve seat, the pressure plate can effectively prevent high-speed airflow from directly washing the sealing ring, and the structural design has a good protection effect on the sealing ring.
And a balance hole for communicating the air inlet cavity with the inner cavity of the cylinder is formed in the pressure plate at the left end of the piston. This kind of balanced pore structure design can be with the pressure of the intracavity of admitting air medium leading-in jar inner chamber, and its effect is: when the axial flow regulating valve is opened in a normal regulating working state, the inner end face and the outer end face of a piston which is matched in a cylinder sleeve in a sliding way can be subjected to the same air pressure effect, and the axial flow regulating valve has obvious effects on ensuring the portability and the flexibility of the leftward and rightward sliding of the piston in the cylinder sleeve so as to improve the pressure regulating reaction speed; when the axial flow regulating valve is in a closed state, the pressurized air medium led into the inner cavity of the cylinder from the balance hole always acts on the inner end surface of the piston, and the piston can be pushed tightly by means of medium pressure to form an air pressure self-tightening type auxiliary sealing structure, so that the axial flow regulating valve has a certain effect of enhancing the closing sealing performance of the axial flow regulating valve.
Damping bolts are arranged on the left tray and the right tray which are used for clamping the pressure regulating diaphragm in a penetrating way, and damping micropores communicated with the left diaphragm cavity and the right diaphragm cavity are arranged in a damping bolt rod body to form a slow air release channel structure. The structural design can effectively improve the pressure change smoothness and stability of the pressure regulating signal air interface in the leading-in left diaphragm cavity, can slow down the strong impact force formed by the pressure regulating diaphragm due to the overlarge pressure transient amplitude of the pressure regulating signal air interface, can effectively avoid the equipment accident of tearing and damaging the pressure regulating diaphragm due to the overlarge pressure difference of the left and right diaphragm cavities, and has very obvious technical effects of protecting the pressure regulating diaphragm, prolonging the service life and improving the pressure regulating and stabilizing performance.
The pressure difference between the two ends of the inlet and the outlet of the damping micropore slow-release air passage is controlled to be 0.06 MPa-0.09 MPa. The optimized design of controlling the pressure difference between the two ends of the inlet and the outlet of the damping micropore slow and slow release channel between 0.06MPa and 0.09MPa has excellent slow release effect, and trial shows that: the pressure regulating device has certain technical effects of slowly releasing transient amplitude of smooth pressure regulating air medium pressure, improving smooth and stable performance of pressure regulation, improving pressure regulating precision and stabilizing output air pressure.
And a wear-resistant stainless steel sleeve is embedded on the wall surface of an inner opening of the air outlet cavity of the right valve cover, and the right end of the right tray is sleeved on the inner wall surface of the wear-resistant stainless steel sleeve in a sliding manner. The right valve cover is made of carbon steel, so that the surface of the right valve cover is easily rusted to be unfavorable for the sliding of the right end sleeve. The sliding flexibility of the right end sleeve can be guaranteed by adopting the structure of inlaying the wear-resistant stainless steel sleeve, and the sensitivity of pressure regulating and guiding can be further guaranteed. After the wear-resisting stainless steel sleeve is worn, the right valve cover does not need to be integrally replaced, and only one wear-resisting stainless steel sleeve needs to be embedded and matched again.
The valve sleeve is provided with a group of inclined air outlets with an inclination angle alpha of 40-65 degrees. The design of the inclined air outlet structure can greatly improve the smooth and stable performance of the flow state of air at the outlet end of the annular axial flow channel, and has very obvious technical effects of preventing the generation of turbulence, reducing the resistance of a flow channel, reducing the pressure loss of air delivery and reducing vibration noise.
Compared with the prior art, the invention has the following advantages:
the invention discloses a piston type axial flow pressure regulator which is composed of an axial flow regulating valve, a pressure regulating controller and a group of signal pipes, and has the prominent structural characteristics that: the flow passage, the throttling decompression and the guide mechanism in the axial flow regulating valve are designed into separated functional components according to the separation principle. That is to say: it inlays between valve seat and valve barrel and inlays and installs a cylinder liner and main valve casing and constitutes "annular flow path" structure, its advantage is: the pressure regulating spring can be assembled in the cylinder sleeve, so that the structure is more compact, the diameter of the pressure regulating spring is greatly reduced, the manufacturing difficulty and the production cost are further reduced, and the technical effect of improving the stability of pressure regulating work is obvious; the piston which is axially pushed by the pressure regulating valve rod is arranged in the cylinder sleeve in a sliding way, and a throttle pressure reducing structure can be formed at the inlet end of the annular channel to carry out pressure regulating and stabilizing operation, so that the piston cylinder has the advantages that: the adjustable throttle valve can ensure that a piston slides left and right in a cylinder sleeve to perform throttling and pressure regulating operation only by axial push-pull acting force, well overcomes the use defects of large flow resistance, large vibration and high noise caused by the fact that a traditional regulating valve 'a lower inlet and an upper outlet curved flow channel' is easy to generate turbulent flow, and has very obvious technical effects on further improving the pressure regulating precision and the pressure regulating stability; set up left and right end cover respectively on left and right tray and constitute "guiding mechanism", it compares with current "throttle direction integrated design", its advantage is: the single throttling functional part and the single guiding functional part are respectively designed and manufactured according to a 'separating principle', so that the size of the single part is more compact, the manufacturing difficulty is greatly reduced, the machining precision of the single part is easier to ensure, and the method is particularly convenient for production, manufacturing, combination, assembly, maintenance and overhaul and part replacement and disassembly operations. The trial shows that: the guide mechanism separated from the throttling and pressure reducing structure has excellent positioning and guiding performance, and has obvious technical effects of further improving the pressure regulating precision and the pressure regulating stability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention, and is also an abstract drawing.
Fig. 2 shows a schematic structural diagram of the pressure regulating film clamped between the left tray and the right tray by a set of connecting screws.
Fig. 3 is a view a-a of fig. 2, showing a schematic structure of a set of left tray air passage holes formed in the wall of the left tray.
Fig. 4 is a partial enlarged view of fig. 1, showing a schematic structural view of a slow release air duct formed by installing damping bolts on a left tray and a right tray for clamping pressure regulating diaphragms.
Fig. 5 is a structural view (enlarged) of the damping bolt, showing a structural view of providing damping micro holes in the damping bolt.
Fig. 6 is a schematic structural view (enlarged) of a valve seat of the axial flow regulator valve, showing a schematic structural view in which a cemented carbide ring is deposited on the right end face of the valve seat by bead welding.
Fig. 7 is a schematic structural view (enlarged) of a piston of the axial flow regulating valve, and shows an embedding structure schematic view of a press-fitting sealing ring formed by connecting and installing a pressing plate at the left end of the piston.
Fig. 8 is a schematic structural view (enlarged) of a valve sleeve of the axial flow regulating valve, showing a schematic structural view of a set of inclined air outlets provided on a wall body of the valve sleeve.
Fig. 9 is a schematic structural view (enlarged) of the pressure regulating controller of the present invention, showing a schematic view that a pressure maintaining valve is fixedly connected and installed on a commanding valve by a group of connecting bolts to form a "closed butt joint air passage structure".
Fig. 10 is a schematic view (enlarged) of the structure of a pilot valve of the pressure regulating controller.
Fig. 11 is a schematic structural view (enlarged) of a pressure maintaining valve of the pressure regulating controller.
Fig. 12 is a view from B to B in fig. 10, which shows a schematic structural view of a pilot signal pipe connected and installed on the middle valve body of the pilot valve and communicated with the throttling outlet channel.
Description of the reference symbols in the drawings:
1 is a main pressure regulating signal pipe, 2 is a single solid arrow, 3 is a left membrane cavity, 4 is a damping bolt, 5 is a pressure regulating valve rod, 6 is a main valve body, 7 is a cylinder sleeve, 8 is an annular axial flow channel, 9 is a pressure regulating spring, 10 is a piston, 11 is a left valve body, 12 is a valve seat, 13 is an air inlet cavity, 14 is a sealing ring, 15 is a balance hole, 16 is a double-line hollow arrow, 17 is a screw, 18 is a pressure plate, 19 is a throttling window, 20 is an inclined air outlet, 21 is a valve sleeve, 22 is a left disk air channel hole, 23 is a left tray, 24 is a cylinder inner cavity, 25 is a left end sleeve, 26 is a right disk air channel hole, 27 is a right end sleeve, 28 is a wear-resistant stainless steel sleeve, 29 is a right tray, 30 is a set of connecting screws, 31 is a front pressure signal pipe, 32 is an air outlet cavity, 33 is an output main pipe, 34 is a rear pressure signal pipe, 35 is a return pipe, 36 is a right membrane cavity, 37 is a pressure regulating membrane, 38 is a right pressure regulating membrane, 39 is a through hole, and 40 is a damping micropore, 41 is a hard alloy ring, 42 is a command screw cap, 43 is an upper valve body, 44 is a middle valve body, 45 is a rear pressure air inlet channel, 46 is a command valve flap shaft, 47 is a command air chamber, 48 is a command air inlet channel, 49 is a lower valve body, 50 is a group of connecting bolts, 51 is a pressure stabilizing air adjusting channel, 52 is a pressure stabilizing valve body, 53 is a pressure stabilizing valve flap shaft, 54 is a pressure stabilizing membrane component, 55 is a pressure stabilizing valve cover, 56 is a pressure stabilizing adjusting screw rod, 57 is a command membrane component, 58 is a command adjusting spring, 59 is a command adjusting screw rod, 60 is a command lower membrane cavity, 61 is a base, 62 is a throttling air outlet cavity, 63 is a command throttling spring, 64 is a rear pressure air outlet channel, 65 is a command throttling valve flap, 66 is a command bolt, 67 is a pressure spring plate, 68 is a pressure stabilizing upper membrane cavity, 69 is a rear pressure introducing channel, 70 is a pressure stabilizing throttling flap, 71 is a pressure stabilizing air chamber, 72 is a pressure stabilizing spring, 73 is a pressure-stabilizing lower diaphragm cavity, 74 is a pressure-stabilizing bolt, 75 is a pressure-stabilizing adjusting spring, 76 is a pressure-stabilizing plate, 77 is a throttling air outlet channel, KZ is a pressure-regulating controller, and alpha is an inclination angle.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
the piston type axial flow pressure regulator provided by the invention mainly comprises an axial flow regulating valve, a pressure regulating controller KZ, a front pressure signal pipe 31, a rear pressure signal pipe 34, a main regulating signal pipe 1 and a return pipe 35 which are connected with the axial flow regulating valve and the pressure regulating controller KZ.
The axial flow regulating valve mainly comprises a main valve body 6, a left valve body 11 and a right valve cover 38 which are arranged at two ends of the main valve body 6, a valve seat 12 and a valve sleeve 21 which are assembled in the main valve body 6, a cylinder sleeve 7 is fixedly embedded between the valve seat 12 and the valve sleeve 21 to be separated into an annular axial flow channel 8, a group of throttling windows 19 communicated with the inlet end of the annular axial flow channel 8 are arranged on the wall body of the cylinder sleeve 7, a group of inclined air outlets 20 communicated with the outlet end of the annular axial flow channel 8 are arranged on the wall body of the valve sleeve 21, and the inclination angle alpha of the group of inclined air outlets 20 can be optimally controlled to be 45 degrees during actual production and manufacturing. A piston 10 is slidably assembled in a cylinder sleeve 7 to form a cylinder inner cavity 24, a pressure regulating spring 9 for supporting the piston 10 is also assembled in the cylinder sleeve 7, the left end of the piston 10 is fixedly connected and installed with a pressure plate 18 through a screw 17 to form an embedded structure for press-mounting a sealing ring 14, a hard alloy ring 41 is arranged on the right end surface of a valve seat 12 in a surfacing mode at a position corresponding to the press-mounted sealing ring 14 to form a closed sealing pair structure of an axial flow regulating valve, a balance hole 15 for communicating an air inlet cavity 13 with the cylinder inner cavity 24 is arranged on the pressure plate 18 at the left end of the piston 10, a pressure regulating valve rod 5 is fixedly connected and installed on the piston 10, a pressure regulating film 37 clamped by a left tray 23 and a right tray 29 is assembled between a right valve cover 38 and a main valve body 6 to be divided into a left film cavity 3 and a right film cavity 36, left tray 23, right tray 29 press from both sides in pressure regulating diaphragm 37 left side with a set of connecting screw 30 fixed connection clamp, the right side both sides, press from both sides left tray 23 of pressure regulating diaphragm 37, wear to fit in the through-hole 39 on the right tray 29 and install damping bolt 4, be provided with intercommunication left diaphragm chamber 3 in the damping bolt 4 body of rod, the damping micropore 40 of right diaphragm chamber 36 forms the structure of slowly losing heart, when actual production is made, can slowly release the import of air flue with damping micropore 40, the pressure differential optimal control between the export both ends is 0.08MPa, it all has obvious technological effect to slowly-releasing smooth pressure regulating air-medium pressure transient range, improve and press and change smooth-going stationary behavior and improve the stable output atmospheric pressure of pressure regulating precision. The right end of the pressure regulating valve rod 5 is fixedly connected and installed on the left tray 23 and the right tray 29, a group of left tray air passage holes 22 and right tray air passage holes 26 communicated with the air outlet cavity 32 are correspondingly arranged on the wall bodies of the left tray 23 and the right tray 29, the left end sleeve 25 of the left tray 23 is in sliding fit with the inner wall surface of the valve sleeve 21, the inner opening wall surface of the air outlet cavity 32 of the right valve cover 38 is inlaid with a wear-resistant stainless steel sleeve 28, and the right end sleeve 27 of the right tray 29 is in sliding fit with the inner wall surface of the wear-resistant stainless steel sleeve 28.
The pressure regulating controller KZ consists of a command valve and a pressure stabilizing valve which are fixedly connected into a whole.
The commanding valve mainly comprises a lower valve body 49, a middle valve body 44, an upper valve body 43, a commanding and adjusting spring 58, a commanding nut 42 and a commanding and adjusting screw 59 in threaded connection with the commanding nut 42, a commanding diaphragm assembly 57 is assembled between the upper valve body 43 and the middle valve body 44 to form a commanding lower diaphragm cavity 60, a back pressure air inlet channel 45 and a back pressure air outlet channel 64 which are communicated with the commanding lower diaphragm cavity 60 are arranged in the wall body of the middle valve body 44, a base 61 is connected and installed on the commanding diaphragm assembly 57 through a commanding bolt 66, the commanding and adjusting spring 58 is supported between the base 61 and a pressure spring plate 67, the bottom end of the commanding and adjusting screw 59 is abutted against the pressure spring plate 67, a commanding air chamber 47, a throttling air outlet cavity 62 and a throttling air outlet channel 77 which are communicated with the commanding air chamber 47 are arranged in the wall body of the middle valve body 44, a commanding valve clack 65 and a commanding and throttling spring 63 which is supported on the commanding and commanding valve clack 65 are arranged in the wall body 47, and a commanding valve clack shaft 46 is slidably arranged in a guide hole of the commanding bolt 66, and a commanding clack 48 is communicated with the commanding valve clack 47 is arranged in the wall body.
The pressure stabilizing valve mainly comprises a pressure stabilizing valve body 52, a pressure stabilizing valve cover 55, a pressure stabilizing adjusting spring 75 and a pressure stabilizing adjusting screw rod 56 in threaded connection with the pressure stabilizing valve cover 55, wherein a pressure stabilizing film assembly 54 is assembled between the pressure stabilizing valve cover 55 and the pressure stabilizing valve body 52 and is divided into a pressure stabilizing upper film cavity 68 and a pressure stabilizing lower film cavity 73, a back pressure introducing channel 69 communicated with the pressure stabilizing upper film cavity 68 is arranged in the wall body of the pressure stabilizing valve cover 55, the pressure stabilizing adjusting spring 75 is supported between the pressure stabilizing film assembly 54 and a pressure stabilizing plate 76, the bottom end of the pressure stabilizing adjusting screw rod 56 is abutted against the pressure stabilizing plate 76, a pressure stabilizing adjusting air passage 51 and a pressure stabilizing air chamber 71 communicated with the pressure stabilizing lower film cavity 73 are arranged in the wall body of the pressure stabilizing valve body 52, a pressure stabilizing throttling valve flap 70 and a pressure stabilizing throttling spring 72 supported on the pressure stabilizing throttling flap 70 are assembled in the pressure stabilizing air chamber 71, and a pressure stabilizing valve flap shaft 53 of the pressure stabilizing throttling flap 70 is slidably assembled in a positioning hole of the pressure stabilizing bolt 74.
The pressure stabilizing valve is fixedly connected and installed on a lower valve body 49 and a middle valve body 44 of the command valve through a group of connecting bolts 50, and a back pressure introducing channel 69 and a pressure stabilizing adjusting air channel 51 of the pressure stabilizing valve are respectively butted with a back pressure air outlet channel 64 and a command air inlet channel 48 of the command valve to form a 'closed communicated butted air channel structure'.
The piston type axial flow pressure regulator provided by the invention is installed according to the following operation steps:
firstly, fixedly connecting an inlet pipe flange on the left valve body 11 of the axial flow regulating valve with an input main pipe, and fixedly connecting an outlet pipe flange on the right valve cover 38 with an output main pipe 33, as shown by a double-line hollow arrow 16, so that a main gas pipeline channel for supplying gas from the input main pipe to the output main pipe 33 through the axial flow regulating valve to the downstream can be formed.
Secondly, one end of the back pressure signal pipe 34 is connected with the output main pipe 33 arranged at the output end of the axial flow regulating valve, and the other end of the back pressure signal pipe 34 is connected with the middle valve body 44 of the command valve and communicated with the back pressure air inlet channel 45. The output pressure fluctuation signal in the outlet cavity 32 can be led into the lower commanding diaphragm cavity 60 of the commanding valve and the upper pressure stabilizing diaphragm cavity 68 of the pressure stabilizing valve.
Thirdly, fixedly connecting and mounting the air inlet end of the front pressure signal tube 31 on the left valve body 11 of the axial flow regulating valve to be communicated with the air inlet cavity 13, and fixedly connecting and mounting the air outlet end of the front pressure signal tube 31 on the pressure stabilizing valve body 52 of the pressure stabilizing valve to be communicated with the pressure stabilizing air chamber 71; the air inlet end of the main adjusting signal pipe 1 is connected and arranged on the middle valve body 44 of the command valve and communicated with the throttling air outlet channel 77, and the air outlet end of the main adjusting signal pipe 1 is connected and arranged on the main valve body 6 of the axial flow adjusting valve and communicated with the left membrane cavity 3; finally, the air inlet end of the return pipe 35 is connected and mounted on the right valve cover 38 of the axial flow regulating valve to be communicated with the right membrane cavity 36, and the air outlet end of the return pipe 35 is connected to the output main pipe 33. Namely, as shown by a single solid arrow 2, a 'pressure regulating signal air source channel' which is simultaneously influenced by the input pressure fluctuation in the air inlet cavity 13 and the output pressure fluctuation in the air outlet cavity 32 is formed.
The piston type axial flow pressure regulator provided by the invention performs pressure regulating and stabilizing operation in the following way:
the gas delivery pipe management personnel carry out setting operation according to the management regulations of gas delivery and distribution: the output air pressure in the output main pipe 33 is adjusted to a rated output pressure value by accurately operating the command adjusting screw 59 and the pressure-stabilizing adjusting screw 56.
At this time: the commanding diaphragm assembly 57 and the commanding throttle valve clack 65 of the commanding valve are in a balanced position state under the combined action of the commanding regulating spring 58, the commanding throttle spring 63, the commanding lower diaphragm chamber 60 and the air pressure in the commanding air chamber 47; the pressure stabilizing membrane assembly 54 and the pressure stabilizing throttle valve clack 70 of the pressure stabilizing valve are in a balanced position state under the combined action of the pressure stabilizing adjusting spring 75, the pressure stabilizing throttle spring 72, the pressure stabilizing upper membrane cavity 68, the pressure stabilizing lower membrane cavity 73 and the air pressure in the pressure stabilizing air chamber 71; the pressure regulating diaphragm 37 of the axial flow regulating valve is also in a balanced position under the combined action of the pressure regulating spring 9 and the air pressure in the left diaphragm chamber 3 and the right diaphragm chamber 36. At this time, the position of the piston 10 slidably fitted in the cylinder liner 7 and the orifice opening formed by the set of orifice windows 19 of the cylinder liner 7 are in an equilibrium position state where the rated output pressure can be maintained.
It should be noted that: the "equilibrium position state" is a relatively stable dynamic equilibrium state, and the "equilibrium position state" is destroyed at any time under the influence of external factors. The mechanism of the piston type axial flow pressure regulator for regulating and stabilizing the pressure is as follows: when the 'balance position state' is just damaged, the automatic regulation can be timely carried out to quickly recover the 'balance position state', and the output pressure can be stably maintained within a rated range.
For example: when the output air pressure at the lower end of the axial flow regulating valve is reduced due to the increase of the amount of air used by a downstream user, the return pipe 35 guides a fluctuation signal of the reduced output pressure into the right membrane cavity 36; the back pressure signal tube 34 will guide the fluctuation signal of the output pressure decrease in the air outlet cavity 32 into the command lower diaphragm cavity 60 of the command valve and the pressure stabilizing upper diaphragm cavity 68 of the pressure stabilizing valve, the balance position state of the command diaphragm assembly 57 in the command valve is destroyed, the command diaphragm assembly 57 will move downwards under the push of the command adjusting spring 58 and drive the command throttle valve flap 65 to move downwards to increase the command throttle opening, so that the increased pressure regulating signal can be input into the left diaphragm cavity 3 from the command air chamber 47 through the throttle air outlet cavity 62, the throttle air outlet channel 77 and finally from the main pressure regulating signal tube 1 and act on the left end face of the pressure regulating diaphragm 37 in a loading manner. At this time, the increased pressure regulating signal pushes the pressure regulating diaphragm 37 to move rightwards, and pulls the piston 10 to move rightwards along with the pressure regulating valve rod 5, and after the piston 10 moves rightwards, the throttle opening of a group of throttle windows 19 on the cylinder sleeve 7 is increased along with the piston, so that the output flow of the axial flow regulating valve can be increased until the output pressure is increased and tends to be stabilized to the set rated output pressure value.
Specifically, it is to be noted that: the ' increased pressure regulating signal ' input into the left diaphragm cavity 3 by the main pressure regulating signal tube 1 is the ' pressure regulating signal ' formed by leading the front pressure signal gas source in the gas inlet cavity 13 into the pressure stabilizing valve by the front pressure signal tube 31 to carry out ' primary pressure stabilizing and throttling ' through the pressure stabilizing and throttling valve flap 70, and then entering the commanding valve to carry out ' secondary pressure regulating and throttling ' through the commanding and throttling valve flap 65, and furthermore, the ' increased pressure regulating signal ' is formed by the combined action of the valve output pressure drop fluctuation signals after being fed back and input into the commanding lower diaphragm cavity 60 and the pressure stabilizing upper diaphragm cavity 68 in the whole process of ' primary pressure stabilizing and throttling ' secondary pressure regulating and throttling '. Obviously, this kind of "the pressure regulating signal of increase" is formed by steady voltage throttle valve clack 70, command throttle valve clack 65 becomes the compound pressure regulating steady voltage structure of establishing ties in proper order behind "primary steady voltage throttle" and "secondary pressure regulating throttle", this kind of "the pressure regulating signal of increase" has splendid "press and becomes smooth and stable" when carrying out the pressure regulating steady voltage operation in left diaphragm chamber 3, the pressure transient range of pressure regulating signal air interface can be greatly slowed down, can effectively alleviate the impact destructive power of pressure regulating diaphragm 37, all have very obvious technological effect to the pressure regulating diaphragm 37 extension working life of protection and improvement voltage regulator's pressure regulating steady voltage working property.
When an extreme condition occurs, when the output pressure of a downstream gas transmission line is sharply reduced due to pipe explosion, the air pressure led into the command valve and the pressure stabilizing valve by the back pressure signal pipe 34 is also rapidly reduced. At this time, the commanding throttle spring 63 and the pressure stabilizing throttle spring 72 push the commanding throttle flap 65 and the pressure stabilizing throttle flap 70 to move upwards to close the commanding valve and the pressure stabilizing valve to cut off the front pressure signal air source rapidly. Meanwhile, the piston 10 can rapidly move a group of throttling windows 19 of the closed cylinder sleeve 7 leftwards under the pushing of the pressure regulating spring 9, and the axial flow regulating valve can be rapidly closed for safety protection.
Conversely, when the output air pressure at the lower end of the axial flow regulating valve rises due to the reduction of the amount of the downstream user air, the return pipe 35 guides a fluctuation signal of the rising output pressure into the right membrane cavity 36; the back pressure signal tube 34 will also lead the fluctuation signal of the output pressure rise in the air outlet cavity 32 into the command lower diaphragm cavity 60 of the command valve and the pressure stabilizing upper diaphragm cavity 68 of the pressure stabilizing valve, the same as above: the equilibrium position state of the commanding membrane assembly 57 in the commanding valve is damaged, the commanding membrane assembly 57 can move upwards under the pushing of the ascending air pressure in the commanding lower membrane cavity 60, at this time, the commanding throttle valve clack 65 can move downwards and upwards under the pushing of the commanding throttle spring 63 to reduce the commanding throttle opening, namely, a reduced pressure regulating signal can be input into the left membrane cavity 3 through the throttle air outlet cavity 62, the throttle air outlet channel 77 and the main pressure regulating signal pipe 1, because the output pressure fluctuation signal led into the right membrane cavity 36 by the return pipe 35 is ascending, the pressure regulating membrane 37 can move leftwards under the action of the air pressure in the right membrane cavity 36 and push the piston 10 to move leftwards through the pressure regulating valve rod 5, after the piston 10 moves leftwards, the throttle opening of a group of throttle windows 19 on the cylinder sleeve 7 can be reduced along with the pressure regulating membrane, and the output flow of the axial flow regulating valve can be reduced until the output pressure is reduced and tends to be stabilized to the set rated output pressure value. So far, the invention can perfectly realize the aim of the invention.
Claims (8)
1. A piston type axial flow pressure regulator comprises an axial flow regulating valve, a pressure regulating controller (KZ), a front pressure signal pipe (31), a rear pressure signal pipe (34), a main pressure signal pipe (1) and a return pipe (35), wherein the front pressure signal pipe (31), the rear pressure signal pipe (34), the main pressure signal pipe (1) and the return pipe (35) are connected with the pressure regulating controller (KZ), the command valve comprises a lower valve body (49), a middle valve body (44), an upper valve body (43), a command adjusting spring (58), a command nut (42) and a command adjusting screw (59) in threaded connection with the command nut (42), a command diaphragm assembly (57) is arranged between the upper valve body (43) and the middle valve body (44) to form a command lower diaphragm cavity (60), a rear pressure air inlet channel (45) and a rear pressure air outlet channel (64) which are communicated with the command lower diaphragm cavity (60) are arranged in the wall body of the middle valve body (44), a command diaphragm assembly (57) is connected with a base (61) through a command bolt (66), the command adjusting spring (58) is supported between the base (61) and the pressure signal valve plate (67), the bottom end of the adjusting spring (59) is attached to the upper pressure signal pipe (47), a throttling valve supporting plate (47) is arranged in the command diaphragm chamber (47) and the upper pressure signal pipe (47), and the command diaphragm (47), and the command valve supporting plate (47), and the pilot valve supporting spring supporting plate (47), and the pilot diaphragm (47) are arranged in the pilot valve (47), and the pilot valve supporting spring supporting chamber (47), and the pilot valve (47) are arranged in the pilot valve supporting the pilot valve (47), and the pilot valve (47) A command throttle spring (63) of a swing throttle valve clack (65), a command air inlet channel (48) communicated with a command air chamber (47) is arranged in the wall body of a lower valve body (49), the pressure stabilizing valve comprises a pressure stabilizing valve body (52), a pressure stabilizing valve cover (55), a pressure stabilizing adjusting spring (75) and a pressure stabilizing adjusting screw rod (56) in threaded connection with the pressure stabilizing valve cover (55), a pressure stabilizing membrane component (54) is assembled between the pressure stabilizing valve cover (55) and the pressure stabilizing valve body (52) and is divided into a pressure stabilizing upper membrane cavity (68) and a pressure stabilizing lower membrane cavity (73), a back pressure introducing channel (69) communicated with the pressure stabilizing upper membrane cavity (68) is arranged in the wall body of the pressure stabilizing valve cover (55), the pressure stabilizing adjusting spring (75) is supported between the pressure stabilizing membrane component (54) and the pressure stabilizing plate (76), the bottom end of the pressure stabilizing adjusting screw rod (56) is abutted against the pressure stabilizing plate (76), a pressure stabilizing adjusting air passage (51) and an air chamber (71) communicated with the pressure stabilizing lower membrane cavity (73) are arranged in the pressure stabilizing valve body (52), a throttle valve body (70) is connected with a pressure stabilizing valve body (49) by a pressure stabilizing bolt, and a throttle valve body (70) which are arranged in the pressure stabilizing valve body (71), the back pressure of surge damping valve introduces passageway (69), surge regulation air flue (51) and docks respectively in the back pressure of command valve and presses out gas passageway (64), command inlet channel (48) and form "airtight intercommunication butt joint air flue structure", axial flow governing valve include main valve body (6), install left valve body (11), right valve cover (38) at main valve body (6) both ends and join in marriage disk seat (12), valve barrel (21) of joining in main valve body (6), its characterized in that: fixedly inlay dress cylinder sleeve (7) and separate for annular axial flow passageway (8) between disk seat (12) and valve barrel (21), set up a set of and the communicating throttle window (19) of annular axial flow passageway (8) entrance point on the wall body of cylinder sleeve (7), set up a set of and the communicating slope air outlet (20) of annular axial flow passageway (8) exit end on the wall body of valve barrel (21), sliding fit piston (10) formation jar inner chamber (24) in cylinder sleeve (7), fixed connection installs pressure regulating valve rod (5) on piston (10), join in marriage between right valve lid (38) and main valve body (6) and adorn by left tray (23), pressure regulating diaphragm (37) of right tray (29) clamp and separate for left diaphragm chamber (3), right diaphragm chamber (36), the right-hand member fixed connection of pressure regulating valve rod (5) is installed on left tray (23), right tray (29), set up a set of communicating left side tray gas passage hole (22) with air outlet chamber (32) on left tray (23), right tray (29) wall body front end fixed connection in left tray (31) of left tray (23), right tray (29), the right tray (31) is joined in marriage the right tray (31) and is connected in left tray (31) of left tray (32) front side tray (31) of valve body (21), the inner wall face of left tray (31) of valve sleeve (31), the pressure regulating valve sleeve (31) of left tray (21), the pressure regulating valve sleeve (31), the right tray (32) is joined in the right tray (32) of left tray (31) that the pressure regulating valve sleeve is joined in marriage to be connected with the right tray (32) that the left tray (32) is joined in marriage to be connected with the right tray (32) that the left tray (23), the left tray (32) that the pressure regulating valve sleeve (23), the right tray (32) is connected with the left tray (32) of left tray (31), the pressure regulating valve body (32) that the pressure regulating valve sleeve (32) is connected with air outlet chamber (32) that the pressure regulating valve body (31), the valve sleeve 11 The upper part of the rear pressure signal pipe is communicated with an air inlet cavity (13), the air outlet end of a front pressure signal pipe (31) is fixedly connected and installed on a pressure stabilizing valve body (52) of a pressure stabilizing valve and is communicated with a pressure stabilizing air chamber (71), one end of a rear pressure signal pipe (34) is connected and installed on an output main pipe (33) at the output end of an axial flow regulating valve, the other end of the rear pressure signal pipe (34) is connected and installed on a middle valve body (44) of a command valve and is communicated with a rear pressure air inlet channel (45), the air inlet end of a main adjusting signal pipe (1) is connected and installed on the middle valve body (44) of the command valve and is communicated with a throttling air outlet channel (77), the air outlet end of the main adjusting signal pipe (1) is connected and installed on a main valve body (6) of the axial flow regulating valve and is communicated with a left membrane cavity (3), the air inlet end of a return pipe (35) is connected and installed on a right membrane cavity (36) of the axial flow regulating valve cover (38) and is communicated with a right membrane cavity (36), and the air outlet end of the return pipe (35) is connected and is connected with the output main pipe (33).
2. The piston axial flow pressure regulator of claim 1, wherein: a pressure regulating spring (9) for supporting the piston (10) is arranged in the cylinder sleeve (7).
3. The piston axial flow pressure regulator according to claim 1 or 2, characterized in that: the left end of the piston (10) is fixedly connected with a mounting pressure plate (18) through a screw (17) to form an embedding structure for press-fitting the sealing ring (14), and a hard alloy ring (41) is arranged at the position, corresponding to the press-fitted sealing ring (14), of the right end face of the valve seat (12) in a surfacing mode.
4. The piston-type axial flow pressure regulator according to claim 1 or 2, characterized in that: a pressure plate (18) at the left end of the piston (10) is provided with a balance hole (15) for communicating the air inlet cavity (13) with the cylinder inner cavity (24).
5. The piston axial flow pressure regulator according to claim 1 or 2, characterized in that: damping bolts (4) are arranged on a left tray (23) and a right tray (29) which are used for clamping pressure regulating diaphragms (37) in a penetrating way, and damping micropores (40) communicated with a left diaphragm cavity (3) and a right diaphragm cavity (36) are arranged in a rod body of each damping bolt (4) to form a slow release channel structure.
6. The piston axial flow pressure regulator of claim 5, wherein: the pressure difference between the two ends of the inlet and the outlet of the slow air release channel of the damping micropore (40) is controlled to be 0.06 MPa-0.09 MPa.
7. The piston-type axial flow pressure regulator according to claim 1 or 2, characterized in that: and a wear-resistant stainless steel sleeve (28) is embedded in the wall surface of an inner opening of the air outlet cavity (32) of the right valve cover (38), and the right end sleeve (27) of the right tray (29) is in sliding fit with the inner wall surface of the wear-resistant stainless steel sleeve (28).
8. The piston-type axial flow pressure regulator according to claim 1 or 2, characterized in that: the valve sleeve (21) is provided with a group of inclined air outlets (20) with an inclination angle (alpha) of 40-65 degrees.
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| DE202017105426U1 (en) | 2017-09-07 | 2018-12-10 | Neoperl Gmbh | valve assembly |
| CN109630277B (en) * | 2018-12-06 | 2021-01-15 | 西北工业大学 | Rotary detonation engine embedded with turbulence device |
| CN109469735B (en) * | 2018-12-11 | 2023-10-27 | 四川长仪油气集输设备股份有限公司 | Valve seat structure of double-valve-port three-seal valve core |
| CN110822143B (en) * | 2019-06-27 | 2024-03-15 | 杭州春江阀门有限公司 | Constant flow combined valve |
| CN112879584B (en) * | 2021-01-11 | 2022-03-01 | 宁波方太厨具有限公司 | Adjustable flow stabilizing valve |
| CN113404919B (en) * | 2021-07-29 | 2022-09-06 | 四川长仪油气集输设备股份有限公司 | Controller subassembly has sealed voltage regulator of level four throttle |
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| GB1259772A (en) * | 1967-12-08 | 1972-01-12 | Lucas Industries Ltd | Fuel control systems for gas turbine engines |
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