CN114542764B - Proportional pressure valve with air supply switch - Google Patents

Proportional pressure valve with air supply switch Download PDF

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Publication number
CN114542764B
CN114542764B CN202210441700.9A CN202210441700A CN114542764B CN 114542764 B CN114542764 B CN 114542764B CN 202210441700 A CN202210441700 A CN 202210441700A CN 114542764 B CN114542764 B CN 114542764B
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China
Prior art keywords
valve
cavity
air
exhaust
communicated
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CN202210441700.9A
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Chinese (zh)
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CN114542764A (en
Inventor
单晓荣
陈卫华
竺伟杰
单军波
严瑞康
尚策
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NINGBO JIAERLING PNEUMATIC MACHINERY CO Ltd
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NINGBO JIAERLING PNEUMATIC MACHINERY CO Ltd
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Priority to CN202210441700.9A priority Critical patent/CN114542764B/en
Publication of CN114542764A publication Critical patent/CN114542764A/en
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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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/0624—Lift 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
    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Multiple-Way Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention discloses a proportional pressure valve with an air supply switch, which comprises a main valve body and a control module, wherein the main valve body is provided with an electric control assembly, a push rod, an air inlet, a working port, an air outlet, an air inlet cavity, a middle cavity and an air outlet cavity; the working port is provided with a pressure feedback device; the valve core is provided with a communicating cavity, and the side wall of the valve core is provided with a first communicating hole; an exhaust seat is arranged in the main valve body; the device also comprises a first elastic piece and a second elastic piece; the main valve body is equipped with the module of admitting air, and the module of admitting air includes lid, air flue and ooff valve, and the air flue includes main inlet channel and branch's passageway. The invention has the following advantages and effects: can realize admitting air, pressurize, exhaust process, go back the atmospheric pressure of accessible pressure feedback device in time control work mouthful department, realize long-time stable pressurize, and controllable at any time through pressure feedback, it is convenient to use, has the effect that the structure is compacter, the volume is less, the packing and the transportation of being convenient for.

Description

Proportional pressure valve with air supply switch
Technical Field
The invention relates to the technical field of valves, in particular to a proportional pressure valve with an air supply switch.
Background
The proportional pressure valve is used as a highly integrated mechatronic product, is the core of an electrical proportional control technology, represents the development direction of a fluid control technology, and is widely applied to factory automation and vehicle control.
Present proportional pressure valve is mainly including the air inlet, gas vent and working hole, the working hole communicates in gas appliances, during the use, gas transmission device connects in the air inlet and from the air inlet air admission, when gas appliances need input different gas, many gas-supply pipes need to be connected to the air inlet, every gas-supply pipe communicates different gas respectively, and realize the break-make through the control valve respectively, control valve and gas-supply pipe and proportional pressure valve components of a whole that can function independently set up, not only there is the bulk volume great, the loose problem of structure, and be not convenient for packing and transportation moreover. In addition, the existing proportional pressure valve is difficult to realize long-time stable pressure maintaining and pressure regulation at any time.
Disclosure of Invention
The invention aims to provide a proportional pressure valve with an air supply switch, which has the effects of compact structure, stable pressure maintaining and controllable pressure.
The technical purpose of the invention is realized by the following technical scheme: a proportional pressure valve with an air supply switch comprises a main valve body and a control module, wherein the main valve body is provided with an electric control assembly and a push rod, and the electric control assembly controls the push rod to stretch; the main valve body is provided with an air inlet, a working port, an exhaust port, an air inlet cavity communicated with the air inlet, a middle cavity communicated with the working port and an exhaust cavity communicated with the exhaust port, a first valve port is arranged in the main valve body, a valve core is movably arranged, the air inlet cavity is communicated with the middle cavity through the first valve port, and the valve core is matched with the first valve port in an opening and closing manner; the working port is provided with a pressure feedback device, and the pressure feedback device is in control fit with the electric control assembly;
the valve core is provided with a communicating cavity, the side wall of the valve core is provided with a first communicating hole, and the middle cavity is communicated with the communicating cavity through the first communicating hole;
an exhaust seat is movably arranged in the main valve body, one end of the exhaust seat is abutted and matched with the push rod, the other end of the exhaust seat extends into the exhaust cavity, the exhaust seat and the valve core form a second valve port, and when the exhaust seat is abutted against the top end of the valve core extending into the exhaust cavity, the second valve port is closed;
the valve core is always provided with a movement trend which is propped against the first valve port by the first elastic part, so that the first valve port is closed; the second elastic piece enables the exhaust seat to always have a movement trend away from the valve core, so that the second valve port is opened;
the main valve body is also provided with an air inlet module, the air inlet module comprises a cover body, an air passage and a switch valve, the air passage is arranged on the cover body and comprises a main air inlet channel and branch channels, the main air inlet channel is communicated with the air inlet, the branch channels are communicated with the main air inlet channel, and the switch valves are arranged in the branch channels of the cover body in a one-to-one correspondence manner;
the main valve body is provided with an air inlet guide sleeve and an air outlet guide sleeve, and one end of the valve core extends into the air inlet guide sleeve; the exhaust seat is provided with an upper through hole, and when the second valve port is closed, the communicating cavity is communicated with the inner cavity of the exhaust guide sleeve through the upper through hole; the main valve body is provided with an end cover, one end of the valve core, which is far away from the exhaust seat, extends into the end cover, the valve core is provided with a lower through hole, and the lower through hole is communicated with the communicating cavity and the inner cavity of the end cover; when the exhaust seat is abutted to the valve core, the pressure-bearing section of the exhaust seat and the valve core along the first axial direction is M1, the pressure-bearing section of the exhaust seat and the valve core along the second axial direction is M2, M1= M2, and the first axial direction is opposite to the second axial direction.
By adopting the technical scheme, in a normal state, the switch valve of the air inlet module is in a closed state, the push rod is far away from the exhaust seat, the first valve port is in a closed state under the elastic action of the first elastic piece and the second elastic piece, the second valve port is in an open state, the air inlet is disconnected with the working port, and the working port is communicated with the exhaust port. During the use, oxygen, nitrogen gas etc. can be connected respectively to different branch passageways, and the ooff valve is opened for oxygen or nitrogen gas accessible main inlet channel lead to the air inlet, and gas-using equipment is connected to the working port. The electric control assembly drives the push rod to extend out of the exhaust seat, the exhaust seat is abutted to the right end of the valve core, the second valve port is closed (the exhaust port is disconnected with the working port), the push rod continues to push, the first valve port is opened (the air inlet is communicated with the working port), when the thrust of the push rod is balanced with the elastic force of the first elastic piece and the elastic force of the second elastic piece, the first valve port can keep a certain opening degree, at the moment, the air inlet transmits air into the air inlet cavity, the air can be introduced into the middle cavity and the working port through the first valve port, air supply is carried out on an air consuming device, and the thrust of the push rod is F1 at the moment. At the moment, the second valve port is still in a closed state, so that the pressure of the working port can quickly reach a set pressure value, in the process of gradually increasing the pressure of the working port, a signal is transmitted to the electronic control assembly through the pressure feedback device, the electronic control assembly can control the push rod to recover, the first valve port is gradually reduced until the first valve port is completely closed when the pressure of the working port reaches the set value, the second valve port still needs to be kept in the closed state at the moment, the pressure maintaining can be realized, and the thrust of the push rod is F2 at the moment. When the pressure of the working port needs to be reduced, the electric control assembly controls the push rod to retract again, a gap is formed between the exhaust seat and the top end of the valve core under the action of the elastic force of the second elastic piece, namely the second valve port is opened, the gas in the middle cavity is exhausted from the exhaust port through the first connecting hole, the communicating cavity and the second valve port in sequence, the thrust of the push rod is F3, F1 is F2, F3 is achieved, the opening degree of the second valve port can be flexibly controlled according to the feedback of the pressure feedback device, and therefore the rapid adjustment of the gas pressure is achieved. So, can realize long-time stable pressurize, and controllable at any time through pressure feedback, it is more convenient to use, in addition, locate the main valve body with the module of admitting air on, have that the structure is compacter, the volume is less, the effect of the packing and the transportation of being convenient for. In the air inlet and pressure maintaining processes, the exhaust seat and the valve core are abutted to form a whole, air can be introduced into the communicating cavity from the middle cavity and then respectively introduced into the inner cavity of the exhaust guide sleeve and the inner cavity of the end cover through the upper through hole and the lower through hole, and as the pressurized section M1 of the whole exhaust seat and the valve core along the first axial direction is equal to the pressurized section M2 of the whole exhaust seat and the valve core along the second axial direction, the axial stress of the exhaust seat and the valve core cannot be influenced even if the air pressure at the working port is increased in the air inlet and pressure maintaining processes, namely, the backpressure phenomenon does not exist, and the air inlet and pressure maintaining device is suitable for the situation of high-pressure air supply.
The invention is further provided with: the main valve body is provided with a detection hole communicated with the working port, the main valve body is provided with a pressure feedback seat, the pressure feedback device comprises a pressure sensor arranged on the pressure feedback seat, the detection hole is communicated with the pressure sensor through an airflow channel, and the pressure sensor is in control fit with the electric control assembly.
By adopting the technical scheme, the air pressure of the working port and the middle chamber can be transmitted to the pressure sensor through the detection hole and the air flow channel, and the pressure sensor controls the push rod to move through the electric control assembly, so that the exhaust seat is pushed to move, and timely and accurate feedback can be realized.
The invention is further provided with: the main valve body is internally provided with a middle sealing seat corresponding to the air inlet and an exhaust spacer bush corresponding to the air outlet, and a middle chamber communicated with the working port is formed between the middle sealing seat and the exhaust spacer bush; the middle sealing seat is provided with an air inlet cavity which is communicated with the air inlet, the exhaust spacer sleeve is provided with an exhaust cavity, and the exhaust cavity is communicated with the exhaust port.
The invention is further provided with: the side wall of the valve core, which is positioned in the air inlet cavity, is provided with a convex part which is matched with the first valve port in an abutting mode, and the projection area of one end face of the convex part along the axial direction of the valve core is S A The projection area of the other reverse end surface of the convex part along the axial direction of the valve core is S B ，S A =S B 。
By adopting the technical scheme, when the valve core moves along the axial direction, the upper convex part of the valve core is driven to move along the axial direction, so that the convex part is close to or away from the first valve port, the on-off of the first valve port can be realized, in addition, because the axial projection area of one end surface of the convex part is the same as the axial projection area of the other end surface opposite to the convex part, when the air inlet admits air, the air pressure in the air inlet cavity can not generate acting force on the valve core to push the valve core to move axially, namely, the valve core is always in a non-backpressure state in the air admission process.
The invention is further provided with: the exhaust seat and the push rod are abutted to form a vent groove, and the vent groove enables the upper through hole to be communicated with the inner cavity of the exhaust guide sleeve all the time.
Through adopting above-mentioned technical scheme, the setting of air channel can make the gaseous accessible of intercommunication intracavity go up through-hole, air channel and let in to the inner chamber of exhaust guide pin bushing fast.
The invention is further provided with: the switch valve comprises a secondary valve body, the secondary valve body is arranged in the cover body, the secondary valve body is provided with a valve cavity, a first vent and a second vent, a piston rod is movably arranged in the valve cavity, a piston is integrally formed on the piston rod, the valve cavity is divided into a front cavity and a rear cavity by the piston, and a first driving structure and a second driving structure which drive the piston to move along the axial direction are arranged in the secondary valve body;
the piston rod is arranged in a hollow shape, a rear guide sleeve is arranged in the secondary valve body, a rear gasket is arranged in the cover body, one end of the piston rod is abutted and matched with the rear gasket to form a third valve port, the first driving structure drives the piston rod to have a movement trend of always abutting against the rear gasket, and the second driving structure drives the piston rod to have a movement trend of being far away from the rear gasket;
a ventilation cavity is formed between the rear gasket and the rear guide sleeve and is always communicated with the second vent, and when the third valve is opened, the second vent is communicated with the first vent through the ventilation cavity; the piston rod comprises a front end and a rear end, the front end of the piston rod extends into the first air vent, the rear end of the piston rod extends into the air vent cavity, and the axial stress area S1 of the front end of the piston rod is equal to the axial stress area S2 of the rear end of the piston rod.
By adopting the technical scheme, in a normal state, one end of the piston rod is always abutted against the rear gasket under the action of the first driving structure, so that the third valve is in a closed state, when the second driving structure drives the piston rod to move towards the direction far away from the rear gasket, the third valve is opened, so that the first vent hole can be communicated with the second vent hole, at the moment, air can be fed from the first vent hole, air flow is conveyed to the vent cavity through the hollow piston rod and is discharged from the second vent hole, because the two end surfaces of the piston rod are equal in axial stress area, when the first vent hole and the vent cavity are filled with gas, the piston rod cannot be influenced by pressure difference to move axially, the pressure difference at the two ends basically keeps the same, no back pressure is realized, and the control device is suitable for high-pressure gas. In addition, the first vent and the second vent can be switched, air is introduced from the second vent and is discharged from the first vent, and the two vents can be used in an optional exchange mode.
The invention is further provided with: the center of the piston rod is provided with a through hole in a straight manner, the front end of the piston rod is provided with a first flat end face and a first inclined face, the rear end of the piston rod is provided with a second flat end face and a second inclined face, the sum of the projection areas of the first flat end face and the first inclined face in the axial direction of the piston rod is S1, and the sum of the projection areas of the second flat end face and the second inclined face in the axial direction of the piston rod is S2.
The invention is further provided with: the lid is including locating protecgulum and the back lid at inferior valve body both ends, and first vent is seted up in the protecgulum, and the back lid is seted up to the second vent, and the front end of piston rod stretches into in the protecgulum, and the rear end of piston rod stretches into in the back lid.
The invention is further provided with: the secondary valve body is provided with a rear airflow channel communicated with the rear cavity and a front airflow channel communicated with the front cavity, the second driving structure comprises a control valve, and an interface of the control valve is communicated with the rear airflow channel; the first drive structure includes an extension spring disposed within the front chamber, the extension spring being compressed and the third valve port being open when gas is communicated to the rear chamber through the rear gas flow passage; when gas in the rear chamber is exhausted through the rear gas flow passage, the extension spring drives the piston to move towards the rear chamber until the third valve port is closed.
By adopting the technical scheme, when the control valve is opened, the air supply device supplies air to the rear cavity through the rear air flow channel, so that the left end surface of the piston is pressed, the piston rod is pushed to move to the first air vent, and the third air vent is opened; after the gas in the back cavity is exhausted, the piston rod automatically resets under the action of the elastic force of the extension spring, and is pressed against the back gasket again, and the third valve opening is closed.
In conclusion, the invention has the following beneficial effects:
1. the mode that the push rod pushes the exhaust seat and the valve core is adopted to realize the processes of air inlet, pressure maintaining and air exhaust, and the air pressure at the working port can be controlled in time through the pressure feedback device, so that the long-time stable pressure maintaining can be realized, the pressure feedback is controllable at any time, the use is more convenient, in addition, the air inlet module is integrally arranged on the main valve body, and the air inlet valve has the effects of more compact structure, smaller volume and convenient packaging and transportation;
2. axial projection area S using one end face of convex part A Axial projection area S with the other end surface B In the same way, when the air inlet supplies air, the air pressure in the air inlet cavity can not generate acting force on the valve core to push the valve core to move axially, namely, the valve core is always in a non-back pressure state in the air inlet process and is used for high-pressure air supply;
3. by adopting the mode that the pressed section M1 of the whole exhaust seat and the valve core along the first axial direction is equal to the pressed section M2 of the whole exhaust seat and the valve core along the second axial direction, the axial stress of the exhaust seat and the valve core can not be influenced even if the air pressure at a working port is increased in the processes of air inlet and pressure maintaining, namely, no back pressure phenomenon exists, and the air pressure regulating valve is suitable for the situation of high-pressure air supply;
4. the mode that the axial force-bearing area S1 of the front end of the piston rod is equal to the axial force-bearing area S2 of the rear end of the piston rod is adopted, so that the pressure difference between the two ends of the piston rod is basically kept the same, no back pressure is realized, in addition, the first vent and the second vent can be switched, air is introduced through the second vent and is discharged from the first vent, the random exchange use can be realized, and the piston rod is suitable for the situation of high-pressure air supply.
Drawings
Fig. 1 is a front view of the embodiment.
Fig. 2 is a right side view of the embodiment.
Fig. 3 is a cross-sectional view of the T-T section of fig. 2.
Fig. 4 is a cross-sectional view of section Q-Q in fig. 1.
Fig. 5 is a cross-sectional view of the U-U section of fig. 3.
Fig. 6 is a structural relationship sectional view of the on-off valve of the embodiment.
FIG. 7 is a cross-sectional view of the components in the main valve body of the embodiment in an intake state.
Fig. 8 is a sectional view of the components in the main valve body of the embodiment in a pressure maintaining state.
FIG. 9 is a sectional view of the components in the main valve body of the embodiment in a vented state.
Fig. 10 is an enlarged view of the region C in fig. 3.
Fig. 11 is a pressure feedback control schematic of the embodiment.
Fig. 12 is a schematic view showing a structural relationship when the exhaust seat and the valve element of the embodiment are abutted.
Fig. 13 is a sectional view showing the structural relationship of the piston rod of the embodiment.
In the figure: 1. a main valve body; 101. a push rod; 102. a proportional electromagnet; 103. an air inlet; 104. a working port; 105. an exhaust port; 106. a middle seal seat; 1061. an air inlet cavity; 1062. a first valve port; 107. an exhaust spacer sleeve; 1071. an exhaust chamber; 108. an intermediate chamber; 109. an exhaust seat; 1091. a vent channel; 1092. an upper through hole; 110. a second valve port; 111. an end cap; 112. a first spring; 113. a second spring; 114. a detection hole; 115. an exhaust guide sleeve; 116. an air inlet guide sleeve; 117. a bushing; 1171. a seal ring; 2. a control module; 3. a cover body; 31. a main intake passage; 32. a branch channel; 33. a front cover; 331. a first vent; 332. a front gasket; 34. a rear cover; 341. a second vent; 342. a rear gasket; 3421. a second communication hole; 3422. a sealing block; 4. an on-off valve; 41. a sub-valve body; 411. a front cavity; 4111. an extension spring; 412. a rear cavity; 413. a rear guide sleeve; 4131. a second O-ring; 4132. a third O-ring; 4133. a first Y-shaped ring; 414. a vent lumen; 415. a front guide sleeve; 4151. a fourth O-ring; 4152. a fifth O-ring; 4153. a second Y-shaped ring; 416. a rear airflow channel; 417. a front airflow channel; 5. a valve core; 51. a convex portion; 52. a communicating cavity; 53. a first communication hole; 54. a lower through hole; 6. a bearing; 7. a piston rod; 71. a through hole; 72. a piston; 721. a first O-ring; 8. a third valve port; 9. an electromagnetic control valve; w, a first flat end face; x, a first slope; y, a second flat end face; z, a second inclined plane.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A proportional pressure valve with an air supply switch is shown in figures 1-4 and 7-9 and comprises a main valve body 1 and a control module 2, wherein an electric control assembly and a push rod 101 are arranged at one end of the main valve body 1, the electric control assembly is a proportional electromagnet 102, and when the proportional electromagnet 102 is electrified, the push rod 101 can be controlled to move in a telescopic mode relatively. The main valve body 1 is provided with an air inlet 103, a working port 104 and an air outlet 105, a middle sealing seat 106 corresponding to the air inlet 103 and an exhaust spacer 107 corresponding to the air outlet 105 are further arranged in a valve cavity of the main valve body 1, the middle sealing seat 106 is provided with an air inlet cavity 1061 communicated with the air inlet 103, the exhaust spacer 107 is provided with an exhaust cavity 1071 communicated with the air outlet 105, and a middle cavity 108 communicated with the working port 104 is formed between the middle sealing seat 106 and the exhaust spacer 107. The main valve body 1 is further provided with an air inlet module, the air inlet module comprises a cover body 3, an air passage arranged on the cover body 3 and a switch valve 4, the air passage comprises a main air inlet passage 31 and two branch passages 32, the main air inlet passage 31 is communicated with the air inlet 103, the two branch passages 32 are communicated with the main air inlet passage 31, and the switch valve 4 is arranged in the branch passages 32 of the cover body 3 in a one-to-one correspondence manner.
As shown in fig. 7-9, a first valve port 1062 is formed in the center of the middle seal seat 106, a valve element 5 is movably disposed in the main valve body 1, the intake chamber 1061 is communicated with the middle chamber 108 through the first valve port 1062, a protrusion 51 is disposed on a sidewall of the valve element 5 located in the intake chamber 1061, the protrusion 51 of the valve element 5 is in open-close fit with the first valve port 1062, and a projection area of a left end surface of the protrusion 51 along an axial direction of the valve element 5 is S A The projection area of the right end surface of the projection 51 in the axial direction of the valve body 5 is S B ，S A =S B . When the valve core 5 moves along the axial direction, the upper convex part 51 of the valve core is driven to move along the axial direction, so that the convex part 51 is close to or far away from the first valve port 1062, and the on-off of the first valve port 1062 can be realized, in addition, because the axial projection area of the left end surface of the convex part 51 is the same as the axial projection area of the right end surface, when the air inlet 103 admits air, the air pressure in the air inlet cavity 1061 can not generate acting force on the valve core 5 to push the valve core 5 to move axially, namely, the valve core 5 is always in a non-backpressure state in the air admission process.
As shown in fig. 7-9, the valve core 5 is provided with a communicating cavity 52, the right end of the valve core 5 is open, the side wall of the valve core 5 is provided with a first communicating hole 53, and the intermediate chamber 108 is communicated with the communicating cavity 52 through the first communicating hole 53. An exhaust seat 109 is movably arranged in the main valve body 1, the right end of the exhaust seat 109 is abutted and matched with the push rod 101, the left end of the exhaust seat 109 extends into the exhaust cavity 1071, a second valve port 110 is formed between the exhaust seat 109 and the right end of the valve core 5, and when the left end of the exhaust seat 109 abuts against the right end of the valve core 5 extending into the exhaust cavity 1071, the second valve port 110 is closed.
As shown in fig. 7, the valve further includes a first elastic member and a second elastic member, the first elastic member makes the valve core 5 always have a movement tendency against the middle sealing seat 106, so that the first valve port 1062 is closed; the second elastic member causes the exhaust seat 109 to always have a tendency to move away from the valve spool 5, causing the second valve port 110 to open. The main valve body 1 is provided with an end cover 111, one end of the valve core 5 extends into the inner cavity of the end cover 111, the first elastic element is a first spring 112, one end of the first spring 112 abuts against the valve core 5, and the other end of the first spring 112 abuts against the end cover 111. The second elastic member is a second spring 113, one end of the second spring 113 abuts against the exhaust seat 109, and the other end of the second spring 113 abuts against the exhaust spacer 107.
As shown in fig. 7-9 and 11, the working port 104 is connected with a pressure feedback device, and the pressure feedback device is in control fit with the electronic control component. The main valve body 1 is provided with a detection hole 114 communicated with the working port 104, the main valve body 1 is provided with a pressure feedback seat (not shown in the figure), the pressure feedback device comprises a pressure sensor (not shown in the figure) arranged on the pressure feedback seat, the detection hole 114 is communicated with the pressure sensor through an airflow channel, and the pressure sensor is in control fit with the proportional electromagnet 102 so as to drive the push rod 101 to move. The air pressure in the working opening 104 and the middle chamber 108 can be transmitted to the pressure sensor through the detection hole 114 and the air flow channel, and the pressure sensor controls the push rod 101 to move through the electric control assembly, so that the exhaust seat 109 is pushed to move, and timely and accurate feedback can be realized.
As shown in fig. 8, the exhaust seat 109 is axially provided with an upper through hole 1092, and when the second valve port 110 is closed, the communicating cavity 52 is communicated with the inner cavity of the exhaust guide sleeve 115 through the upper through hole 1092; the valve core 5 is provided with a lower through hole 54, and the lower through hole 54 is communicated with the communicating cavity 52 and the inner cavity of the end cover 111; when the exhaust seat 109 abuts against the valve core 5, the pressure-receiving section of the exhaust seat 109 and the valve core 5 as a whole along the first axial direction is M1, the pressure-receiving section of the exhaust seat 109 and the valve core 5 as a whole along the second axial direction is M2, M1= M2, and the first axial direction is opposite to the second axial direction. As shown in fig. 12, a, b, c, d, e, and f are the force-receiving surfaces of the entire lower end surface facing downward in the axial direction, and g, h, i, j, k, m, and n are the force-receiving surfaces of the entire upper end surface facing upward in the axial direction, that is, the sum of the axial projection areas of a + b + c + d + e + f = the sum of the axial projection areas of g + h + i + j + k + m + n. In the air inlet and pressure maintaining processes of the air inlet 103, the exhaust seat 109 and the valve core 5 are abutted to form a whole, air can be introduced into the communicating cavity 52 from the middle chamber 108, and then respectively introduced into the inner cavity of the exhaust guide sleeve 115 and the inner cavity of the end cover 111 through the upper through hole 1092 and the lower through hole 54, because the pressurized cross section M1 of the whole exhaust seat 109 and the valve core 5 along the first axial direction is equal to the pressurized cross section M2 of the whole exhaust seat 109 and the valve core 5 along the second axial direction, even if the air pressure at the working port 104 is increased in the air inlet and pressure maintaining processes, the axial stress of the exhaust seat 109 and the valve core 5 cannot be influenced, namely, no back pressure phenomenon exists, and the air inlet and pressure maintaining device is suitable for the situation of high-pressure air supply.
As shown in fig. 3, 8 and 10, the main valve body 1 is provided with an exhaust guide sleeve 115 and an intake guide sleeve 116, the right end of the exhaust seat 109 extends into the exhaust guide sleeve 115, and the left end of the valve core 5 extends into the intake guide sleeve 116. The exhaust guide sleeve 115 can play a good guiding role in movement of the exhaust seat 109 to a certain extent, and the intake guide sleeve 116 can play a good guiding role in axial movement of the valve core 5 to a certain extent. The exhaust seat 109 and the push rod 101 are abutted to each other and provided with a vent groove 1091, in this embodiment, the vent groove 1091 is provided on the right end face of the exhaust seat 109, the vent groove 1091 makes the upper through hole 1092 always communicate with the inner cavity of the exhaust guide sleeve 115, and the vent groove 1091 is provided to allow the gas in the communicating cavity 52 to pass through the upper through hole 1092 and the vent groove 1091 to the inner cavity of the exhaust guide sleeve 115 quickly.
As shown in fig. 7-9, a bushing 117 located at the lower end of the exhaust spacer 107 is further disposed in the main valve body 1, the outer wall of the valve core 5 is in guiding fit with the bushing 117, a sealing ring 1171 is disposed between the bushing 117 and the outer wall of the valve core 5, and sealing rings are disposed between the exhaust guide 115 and the exhaust seat 109, between the exhaust guide 115 and the proportional electromagnet 102, between the middle sealing seat 106 and the valve core 5, between the middle sealing seat 106 and the intake guide 116, and between the intake guide 116 and the end cap 111. In addition, bearings 6 are arranged between the valve core 5 and the intake guide sleeve 116 and between the exhaust seat 109 and the exhaust guide sleeve 115.
As shown in fig. 3, 5 and 6, the switch valve 4 includes a sub valve body 41, the sub valve body 41 is disposed in the cover body 3, the cover body 3 includes a front cover 33 and a rear cover 34 disposed at two ends of the sub valve body 41, a valve cavity is disposed in the sub valve body 41, the front cover 33 has a first vent 331, the rear cover 34 has a second vent 341, a piston rod 7 is movably disposed in the valve cavity, a through hole 71 is straightly disposed in a center of the piston rod 7 so that the piston rod 7 is hollow, the piston rod 7 includes a front end and a rear end, the front end of the piston rod 7 extends into the first vent 331 of the front cover 33, and the rear end of the piston rod 7 extends into the rear cover 34. The piston 72 is integrally formed on the side wall of the piston rod 7, the valve cavity is divided into a front cavity 411 and a rear cavity 412 by the piston 72, and the side wall of the piston 72 is provided with a first O-ring 721, so that the piston 72 is in sealing fit with the inner wall of the valve cavity.
As shown in fig. 5-6, a rear guide sleeve 413 is disposed at the right end of the sub-valve body 41, the rear guide sleeve 413 is in guiding fit with the rear end of the piston rod 7, a rear gasket 342 is disposed in the rear cover 34, the rear gasket 342 is tightly attached to the rear guide sleeve 413, a vent cavity 414 is formed between the rear gasket 342 and the rear guide sleeve 413, the rear gasket 342 is provided with a second communication hole 3421, and the second communication hole 3421 is communicated with the second vent 341 and the vent cavity 414, so that the vent cavity 414 is always communicated with the second vent 341. The rear guide sleeve 413 is in sealing fit with the secondary valve body 41 through a second O-shaped ring 4131, a part of the rear guide sleeve 413 extends into the rear cover 34 and is in sealing fit with the rear cover 34 through a third O-shaped ring 4132, the rear end of the piston rod 7 penetrates through the rear guide sleeve 413 and extends into the ventilation cavity 414, a first Y-shaped ring 4133 is arranged on the inner wall of the rear guide sleeve 413, and the rear guide sleeve 413 is in sealing fit with the outer wall of the piston rod 7 through the first Y-shaped ring 4133.
As shown in fig. 6, a front guide sleeve 415 is further disposed between the sub valve body 41 and the front cover 33, the front guide sleeve 415 is in guiding fit with the front end of the piston rod 7, the front guide sleeve 415 is in sealing fit with the sub valve body 41 through a fourth O-ring 4151, the front guide sleeve 415 is in sealing fit with the front cover 33 through a fifth O-ring 4152, a second Y-ring 4153 is disposed on the inner wall of the front guide sleeve 415, and the front guide sleeve 415 is in sealing fit with the outer wall of the piston rod 7 through the second Y-ring 4153. The front cover 33 is further internally provided with a front gasket 332, the front cover 33 is internally provided with a tight abutting step, the front guide sleeve 415 is matched with the tight abutting step to clamp and fix the front gasket 332, and the center of the front gasket 332 can be penetrated by the piston rod 7.
As shown in fig. 5-6, a first driving structure and a second driving structure for driving the piston 72 to move along the axial direction are disposed in the sub valve body 41, a sealing block 3422 is disposed on the right end surface of the back gasket 342, the sealing block 3422 is abutted against and matched with the rear end of the piston rod 7 to form a third valve opening 8, the first driving structure drives the piston rod 7 to have a movement tendency against the back gasket 342 all the time, the second driving structure drives the piston rod 7 to have a movement tendency away from the back gasket 342, and when the third valve opening 8 is opened, the second vent 341 is communicated with the first vent 331 through the communicating cavity 52. The end of the piston rod 7 is in sealing fit with the sealing block 3422, so that the sealing effect is good, and the abrasion is not easy to cause.
As shown in fig. 13, the front end of the piston rod 7 is provided with a first flat end surface w and a first inclined surface x, the rear end of the piston rod 7 is provided with a second flat end surface y and a second inclined surface z, the sum of the projection areas of the first flat end surface w and the first inclined surface x along the axial direction of the piston rod 7 is S1, and the sum of the projection areas of the second flat end surface y and the second inclined surface z along the axial direction of the piston rod 7 is S2, S1= S2.
As shown in fig. 6, the secondary valve body 41 is provided with a rear air flow passage 416 communicated with the rear cavity 412 and a front air flow passage 417 communicated with the front cavity 411, the front air flow passage 417 passes through the front cover 33, and one end of the front air flow passage 417 is communicated with the atmosphere, the second driving structure comprises a control valve, the control valve can be set as an electromagnetic control valve 9, and an interface of the electromagnetic control valve 9 is communicated with the rear air flow passage 416; the first driving structure includes an extension spring 4111 disposed in the front cavity 411, the extension spring 4111 is sleeved on the outer wall of the piston rod 7, one end of the extension spring 4111 abuts against the right end surface of the piston 72, and the other end of the extension spring 4111 abuts against the left end surface of the front guide sleeve 415. When the gas passes through the rear gas flow passage 416 to the rear chamber 412, the gas in the extension spring 4111 and the front chamber 411 is exhausted through the front gas flow passage 417, and the third valve port 8 is opened; when gas in the rear chamber 412 is vented through the rear flow passage 416, the extension spring 4111 drives the piston 72 toward the rear chamber 412 until the third port 8 is closed, during which time ambient atmosphere is replenished into the front chamber 411 through the front flow passage 417.
In a normal state, the left end of the piston rod 7 always abuts against the rear gasket 342 under the action of the extension spring 4111, so that the valve port is in a closed state; when the control valve is opened, the air supply device supplies air to the rear cavity 412 through the rear air flow channel 416, so that the left end face of the piston 72 is pressed, the piston rod 7 is pushed to move towards the first air vent 331, the third air vent is opened, the first air vent 331 is communicated with the second air vent 341, at the moment, air can be supplied from the first air vent 331, the air flow is conveyed to the communicating cavity 52 through the hollow piston rod 7 and is discharged from the second air vent 341, because the axial stressed areas of the two end faces of the piston rod 7 are equal, when the first air vent 331 and the communicating cavity 52 are filled with air, the piston rod 7 cannot move axially under the influence of the pressure difference, the pressure difference at the two ends is basically kept the same, no back pressure is realized, and the control device is suitable for high-pressure air control. When the gas in the rear chamber 412 is exhausted, the piston rod 7 automatically resets to the right under the action of the elastic force of the extension spring 4111, and is pressed against the rear gasket 342 again, and the third valve port is closed. The front guide sleeve 415 and the rear guide sleeve 413 are arranged to provide a good guiding effect for the piston rod 7, so that the linearity of the axial movement of the piston rod 7 is improved, and the axial force-bearing areas at the two ends of the piston rod 7 are always equal.
The basic working principle of the invention is as follows: in a normal state, the on-off valve 4 of the intake module is in a closed state, the push rod 101 is away from the exhaust seat 109, the first valve port 1062 is in a closed state and the second valve port 110 is in an open state under the elastic force of the first elastic member and the second elastic member, the intake port 103 is disconnected from the working port 104, and the working port 104 is communicated with the exhaust port 105. When the gas supply device is used, different branch channels 32 can be respectively connected with oxygen, nitrogen and the like, the switch valve 4 is opened, so that the oxygen or the nitrogen can be communicated to the gas inlet 103 through the main gas inlet channel 31, and the working port 104 is connected with gas-using equipment. The electric control assembly drives the push rod 101 to extend towards the exhaust seat 109, the exhaust seat 109 is abutted against the upper end of the valve core 5, the second valve port 110 is closed (the exhaust port 105 is disconnected with the working port 104), the push rod 101 continues to push, the first valve port 1062 is opened (the air inlet 103 is communicated with the working port 104), when the thrust of the push rod 101 is balanced with the elastic force of the first elastic piece and the second elastic piece, the first valve port 1062 can keep a certain opening degree, at the moment, the air inlet 103 transmits air into the air inlet cavity 1061, the air can be transmitted into the intermediate cavity 108 and the working port 104 through the first valve port 1062, air supply is performed for an air using device, and at the moment, the thrust of the push rod 101 is F1. At this time, the second valve port 110 is still in a closed state, so that the pressure of the working port 104 can quickly reach a set pressure value, and in the process of gradually increasing the pressure of the working port 104, a signal is transmitted to the electronic control component through the pressure feedback device, and the electronic control component can control the recovery of the push rod 101, so that the first valve port 1062 is gradually reduced until the pressure of the working port 104 reaches the set value, the first valve port 1062 is completely closed, but at this time, the second valve port 110 still needs to be kept in a closed state, so that pressure maintaining can be realized, and at this time, the thrust of the push rod 101 is F2. When the pressure of the working port 104 needs to be reduced, the electronic control component controls the push rod 101 to retract again, under the action of the elastic force of the second elastic component, a gap is generated between the exhaust seat 109 and the top end of the valve core 5, that is, the second valve port 110 is opened, the gas in the intermediate chamber 108 is exhausted from the exhaust port 105 through the first connecting hole 53, the communication cavity 52 and the second valve port 110 in sequence, at this time, the thrust of the push rod 101 is F3, F1> F2> F3, and the opening degree of the second valve port 110 can be flexibly controlled according to the feedback of the pressure feedback device, so as to realize the rapid adjustment of the gas pressure. So, can realize long-time stable pressurize, and controllable at any time through pressure feedback, it is more convenient to use, in addition, locate main valve body 1 with the module of admitting air integratedly on, have that the structure is compacter, the volume is less, the effect of the packing and the transportation of being convenient for.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.

Claims (9)

1. A proportional pressure valve with an air supply switch comprises a main valve body (1) and a control module (2), wherein the main valve body (1) is provided with an electric control assembly and a push rod (101), and the electric control assembly controls the push rod (101) to stretch; the main valve body (1) is provided with an air inlet (103), a working port (104), an exhaust port (105), an air inlet cavity (1061) communicated with the air inlet (103), a middle cavity (108) communicated with the working port (104) and an exhaust cavity (1071) communicated with the exhaust port (105), and is characterized in that: a first valve port (1062) and a valve core (5) are movably arranged in the main valve body (1), the air inlet cavity (1061) is communicated with the middle chamber (108) through the first valve port (1062), and the valve core (5) is matched with the first valve port (1062) in an opening and closing manner; the working port (104) is provided with a pressure feedback device, and the pressure feedback device is in control fit with the electric control assembly;
the valve core (5) is provided with a communicating cavity (52), the side wall of the valve core (5) is provided with a first communicating hole (53), and the middle cavity (108) is communicated with the communicating cavity (52) through the first communicating hole (53);
an exhaust seat (109) is movably arranged in the main valve body (1), one end of the exhaust seat (109) is abutted and matched with the push rod (101), the other end of the exhaust seat (109) extends into the exhaust cavity (1071), the exhaust seat (109) and the valve core (5) form a second valve port (110), and when the exhaust seat (109) abuts against the top end of the valve core (5) extending into the exhaust cavity (1071), the second valve port (110) is closed;
the valve core (5) always has a movement trend of resisting against the first valve port (1062) by the aid of the first elastic piece and the second elastic piece, and the first valve port (1062) is closed by the aid of the first elastic piece; the second elastic piece enables the exhaust seat (109) to always have a movement trend away from the valve core (5) and enables the second valve port (110) to be opened;
the main valve body (1) is further provided with an air inlet module, the air inlet module comprises a cover body (3), an air passage and a switch valve (4), the air passage is arranged on the cover body (3) and comprises a main air inlet channel (31) and branch channels (32), the main air inlet channel (31) is communicated with an air inlet (103), the branch channels (32) are communicated with the main air inlet channel (31), and the switch valve (4) is arranged in the branch channels (32) of the cover body (3) in a one-to-one correspondence manner;
the main valve body (1) is provided with an air inlet guide sleeve (116) and an air outlet guide sleeve (115), and one end of the valve core (5) extends into the air inlet guide sleeve (116); the exhaust seat (109) is provided with an upper through hole (1092), and when the second valve port (110) is closed, the communication cavity (52) is communicated with the inner cavity of the exhaust guide sleeve (115) through the upper through hole (1092); the main valve body (1) is provided with an end cover (111), one end, far away from the exhaust seat (109), of the valve core (5) extends into the end cover (111), the valve core (5) is provided with a lower through hole (54), and the lower through hole (54) is communicated with the communicating cavity (52) and an inner cavity of the end cover (111); when the exhaust seat (109) is abutted against the valve core (5), the pressure-bearing section of the exhaust seat (109) and the valve core (5) along the first axial direction is M1, the pressure-bearing section of the exhaust seat (109) and the valve core (5) along the second axial direction is M2, M1= M2, and the first axial direction is opposite to the second axial direction.
2. The proportional pressure valve with an air supply switch as claimed in claim 1, wherein: the main valve body (1) is provided with a detection hole (114) communicated with the working port (104), the main valve body (1) is provided with a pressure feedback seat, the pressure feedback device comprises a pressure sensor arranged on the pressure feedback seat, the detection hole (114) is communicated with the pressure sensor through an airflow channel, and the pressure sensor is in control fit with the electric control assembly.
3. The proportional pressure valve with an air supply switch as claimed in claim 1, wherein: a middle sealing seat (106) corresponding to the air inlet (103) and an exhaust spacer bush (107) corresponding to the exhaust port (105) are arranged in the main valve body (1), and a middle chamber (108) communicated with the working port (104) is formed between the middle sealing seat (106) and the exhaust spacer bush (107); an air inlet cavity (1061) is formed in the middle sealing seat (106), the air inlet cavity (1061) is communicated with the air inlet (103), an air exhaust cavity (1071) is formed in the air exhaust spacer sleeve (107), and the air exhaust cavity (1071) is communicated with the air exhaust port (105).
4. The proportional pressure valve with an air supply switch as claimed in claim 3, wherein: a convex part (51) is arranged on the side wall of the valve core (5) positioned in the air inlet cavity (1061), the convex part (51) is abutted and matched with the first valve port (1062), and the projection area of one end surface of the convex part (51) along the axial direction of the valve core (5) is S A The projection area of the other reverse end surface of the convex part (51) along the axial direction of the valve core (5) is S B ，S A =S B 。
5. The proportional pressure valve with an air supply switch as claimed in claim 1, wherein: an air vent groove (1091) is formed in the abutting position of the exhaust seat (109) and the push rod (101), and the air vent groove (1091) enables the upper through hole (1092) to be communicated with the inner cavity of the exhaust guide sleeve (115) all the time.
6. The proportional pressure valve with an air supply switch as claimed in claim 1, wherein: the switch valve (4) comprises a secondary valve body (41), the secondary valve body (41) is arranged in the cover body (3), the secondary valve body (41) is provided with a valve cavity, a first vent hole (331) and a second vent hole (341), a piston rod (7) is movably arranged in the valve cavity, the piston rod (7) is integrally formed with a piston (72), the valve cavity is divided into a front cavity (411) and a rear cavity (412) by the piston (72), and a first driving structure and a second driving structure for driving the piston (72) to move along the axial direction are arranged in the secondary valve body (41);
the piston rod (7) is arranged to be hollow, a rear guide sleeve (413) is arranged in the secondary valve body (41), a rear gasket (342) is arranged in the cover body (3), one end of the piston rod (7) is abutted and matched with the rear gasket (342) to form a third valve port (8), the first driving structure drives the piston rod (7) to have a movement trend of always abutting against the rear gasket (342), and the second driving structure drives the piston rod (7) to have a movement trend of being far away from the rear gasket (342);
a vent cavity (414) is formed between the rear gasket (342) and the rear guide sleeve (413), the vent cavity (414) is always communicated with the second vent hole (341), and when the third valve port (8) is opened, the second vent hole (341) is communicated with the first vent hole (331) through the vent cavity (414); the piston rod (7) comprises a front end and a rear end, the front end of the piston rod (7) extends into the first air vent (331), the rear end of the piston rod (7) extends into the air vent cavity (414), and the axial stress area S1 of the front end of the piston rod (7) is equal to the axial stress area S2 of the rear end of the piston rod (7).
7. The proportional pressure valve with an air supply switch as claimed in claim 6, wherein: through hole (71) have been seted up straightly to the center of piston rod (7), the front end of piston rod (7) is equipped with first planum face (w) and first inclined plane (x), the rear end of piston rod (7) is equipped with second planum face (y) and second inclined plane (z), first planum face (w) with first inclined plane (x) are followed piston rod (7) axial projection area sum is S1, second planum face (y) with second inclined plane (z) are followed piston rod (7) axial projection area sum is S2.
8. The proportional pressure valve with an air supply switch as claimed in claim 6, wherein: the lid (3) is including locating protecgulum (33) and back lid (34) at inferior valve body (41) both ends, first air vent (331) are seted up in protecgulum (33), second air vent (341) are seted up in back lid (34), the front end of piston rod (7) stretch into in protecgulum (33), the rear end of piston rod (7) stretch into in back lid (34).
9. The proportional pressure valve with an air supply switch of claim 8, wherein: the secondary valve body (41) is provided with a rear airflow channel (416) communicated with the rear cavity (412) and a front airflow channel (417) communicated with the front cavity (411), the second driving structure comprises a control valve, and an interface of the control valve is communicated with the rear airflow channel (416); the first drive structure comprises an extension spring (4111) arranged in the front cavity (411), when gas passes to the rear cavity (412) through the rear gas flow channel (416), the extension spring (4111) is compressed, and a third valve port (8) is opened; when the gas in the rear cavity (412) is exhausted through the rear gas flow channel (416), the extension spring (4111) drives the piston (72) to move towards the rear cavity (412) until the third valve port (8) is closed.
CN202210441700.9A 2022-04-26 2022-04-26 Proportional pressure valve with air supply switch Active CN114542764B (en)

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EP1643174A1 (en) * 2004-09-29 2006-04-05 Mac Valves Inc. Pneumatic valve
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CN202302220U (en) * 2011-09-20 2012-07-04 国家气动产品质量监督检验中心 High-precision pneumatic proportional pressure valve
CN106082003A (en) * 2016-06-30 2016-11-09 肖锐 A kind of light weight material pusher
DE102016205041A1 (en) * 2016-03-24 2017-09-28 Robert Bosch Gmbh spool valve
CN113090810A (en) * 2021-05-12 2021-07-09 常州高凯电子有限公司 Piezoelectric proportional valve and control method thereof

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EP3744978B1 (en) * 2018-01-26 2023-11-15 Eagle Industry Co., Ltd. Capacity control valve
CN114352790A (en) * 2022-03-21 2022-04-15 宁波佳尔灵气动机械有限公司 Plug-in type electric pressure proportional valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1643174A1 (en) * 2004-09-29 2006-04-05 Mac Valves Inc. Pneumatic valve
CN101162059A (en) * 2007-11-03 2008-04-16 蚌埠市方正教育设备有限公司 Electromagnetic pilot type high-pressure two-position three-port valve
CN202302220U (en) * 2011-09-20 2012-07-04 国家气动产品质量监督检验中心 High-precision pneumatic proportional pressure valve
DE102016205041A1 (en) * 2016-03-24 2017-09-28 Robert Bosch Gmbh spool valve
CN106082003A (en) * 2016-06-30 2016-11-09 肖锐 A kind of light weight material pusher
CN113090810A (en) * 2021-05-12 2021-07-09 常州高凯电子有限公司 Piezoelectric proportional valve and control method thereof

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