CN112392965A - High-sensitivity automatic control micro-pressure regulating valve - Google Patents
High-sensitivity automatic control micro-pressure regulating valve Download PDFInfo
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- CN112392965A CN112392965A CN202011180050.4A CN202011180050A CN112392965A CN 112392965 A CN112392965 A CN 112392965A CN 202011180050 A CN202011180050 A CN 202011180050A CN 112392965 A CN112392965 A CN 112392965A
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
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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
- F16K17/34—Excess-flow valves in which the flow-energy of the flowing medium actuates the closing 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
- F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
- F16K31/165—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a diaphragm
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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
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
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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
- F16N—LUBRICATING
- F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a high-sensitivity self-control micro-pressure regulating valve, which comprises a main valve body, wherein a valve front channel and a valve rear channel are arranged on the main valve body, a valve port is arranged between the valve front channel and the valve rear channel, a valve rod is connected to the main valve body in a sliding manner, and one end of the valve rod is provided with a valve core; the main valve body is provided with a feedback mechanism, the feedback mechanism is provided with a follower rod which moves along with the pressure change in a valve rear channel, the main valve body is provided with a lever bracket, the lever bracket is rotatably connected with a lever, one end of the lever is connected with the follower rod in a sliding way, and the other end of the lever is connected with the valve rod in a sliding way; the main valve body is provided with a guide sleeve, the valve rod is connected in the guide sleeve in a sliding mode, a lubricating oil cavity is arranged in the guide sleeve, a ball groove is formed in the inner ring surface of the guide sleeve, and balls are connected in the ball groove. According to the invention, the lever mechanism is additionally arranged between the valve rod and the follower rod, and the lever can amplify the force of the follower rod and transmit the amplified force to the valve rod, so that the sensitivity of the self-control regulating valve is effectively improved.
Description
Technical Field
The invention relates to a regulating valve, in particular to a high-sensitivity self-control micro-pressure regulating valve.
Background
The automatic control regulating valve drives the valve to automatically work by taking the self pressure of the medium flowing through as an energy source, and an external power supply and a secondary instrument are not needed. The self-operated regulating valve drives the valve core to correspondingly move by utilizing the pressure change condition of the channel behind the valve, so that the opening degree of the valve port is changed, and the purpose of regulating the pressure is achieved.
The existing self-control regulating valve comprises a main valve body and a feedback mechanism, wherein a front valve channel and a rear valve channel are arranged on the main valve body, a valve port is arranged between the front valve channel and the rear valve channel, a valve rod is connected to the main valve body in a sliding manner, and a valve core matched with the valve port is arranged at one end of the valve rod; the feedback mechanism comprises a box body, a diaphragm is arranged in the box body, a spring is arranged between the diaphragm and the diaphragm chamber, the diaphragm separates the box body into two diaphragm chambers, one of the diaphragm chambers is communicated with the rear channel of the valve through a pipeline, a follower rod is connected to the diaphragm, and the follower rod is connected with the valve rod. When the pressure of the medium in the channel behind the valve changes, the diaphragm can be driven to move correspondingly, so that the follower rod and the valve rod are driven to move, and finally the valve core is driven to move, so that the opening degree of the valve port is changed, and the feedback adjustment effect is achieved. When the existing self-control regulating valve is used, when the change range of the medium pressure in a channel behind the valve is small, the change range of the pressure acting on a diaphragm is small, and the valve core cannot be pushed to generate corresponding action, so that the sensitivity of the self-control regulating valve is poor.
Such as: chinese patent publication No. CN210088138U, the utility model discloses a bellows automatic control governing valve, including valve body, valve rod, disk seat, case, valve gap that constitute the basic subassembly of valve, and airtight the seal receptacle of case, connecting rod and the pneumatic film actuating mechanism of being connected with the valve body are equipped with the inner tube in the connecting rod, the centre bore of inner tube still overlaps and is equipped with the bellows, the upper end of bellows is sealed there is the valve gap, the valve rod runs through the seal receptacle, the centre bore and the valve gap of bellows, and it has the filler to imbed in the centre bore of valve gap, the valve rod upper end is connected with the cooperation of pneumatic film actuating mechanism, borrow its elastic diaphragm and change input atmospheric pressure into the thrust to the push rod, make the case produce corresponding displacement through the. The self-control regulating valve has the following disadvantages: the sensitivity of the self-control regulating valve is poor.
Disclosure of Invention
The invention aims to solve the problem of poor sensitivity of the conventional self-control regulating valve and provides a high-sensitivity self-control micro-pressure regulating valve which can effectively solve the problem.
The purpose of the invention is realized by the following technical scheme: a high-sensitivity self-control micro-pressure regulating valve comprises a main valve body, wherein a valve front channel and a valve rear channel are arranged on the main valve body, a valve port is arranged between the valve front channel and the valve rear channel, a valve rod is connected to the main valve body in a sliding manner, and one end of the valve rod is provided with a valve core matched with the valve port; the main valve body is provided with a feedback mechanism, the feedback mechanism is provided with a follower rod which moves along with the pressure change in a valve rear channel, the main valve body is provided with a lever bracket, the lever bracket is rotatably connected with a lever, one end of the lever is connected with the follower rod in a sliding way, and the other end of the lever is connected with the valve rod in a sliding way; the main valve body is provided with a guide sleeve, the valve rod is connected in the guide sleeve in a sliding manner, an annular lubricating oil cavity is arranged in the guide sleeve, the inner annular surface of the guide sleeve is provided with a plurality of ball grooves, and rotatable balls are connected in the ball grooves; a connecting hole is arranged between the ball groove and the lubricating oil cavity.
In the invention, the pressure change of the medium in the channel behind the valve acts on the follower rod through the feedback mechanism, so that the follower rod is subjected to a certain force to displace the follower rod, and the force applied to the follower rod is transmitted to the valve rod through the lever mechanism to drive the valve rod and the valve core to move, thereby changing the opening degree of the valve port. According to the invention, the lever mechanism is additionally arranged between the valve rod and the follower rod, and the lever can amplify the force of the follower rod and transmit the amplified force to the valve rod, so that the valve rod is driven to generate corresponding action by slight pressure change in a channel behind the valve, and the sensitivity of the self-control regulating valve is effectively improved. According to the invention, the ball is in rolling contact with the side surface of the valve rod, and the ball can reduce the friction between the guide sleeve and the valve rod, so that the resistance of the valve rod during movement is reduced, and the sensitivity of the self-control micro-pressure regulating valve is further improved. The lubricating oil cavity is filled with lubricating oil, and the lubricating oil can flow into the space between the ball and the surface of the ball groove through the connecting hole, so that the lubricating effect on the ball is achieved, and the friction between the ball and the surface of the ball groove during rolling is reduced.
Preferably, the feedback mechanism comprises a box body, a diaphragm is arranged in the box body, the diaphragm divides the box body into an upper film chamber and a lower film chamber, a follower rod is connected to the box body in a sliding mode, a connecting plate is arranged at one end, away from the lever, of the follower rod, the connecting plate is connected with the diaphragm, and a second spring is arranged between the connecting plate and the box body; the box body is provided with an air vent communicated with the upper membrane chamber. The lower membrane chamber is connected with the valve rear channel through a pipeline, the medium pressure in the valve rear channel can act on the membrane, and the membrane pushes the follower rod to move, so that the follower rod can generate corresponding displacement along with the change of the medium pressure in the valve rear channel.
Preferably, the main valve body is provided with an adjusting support, the adjusting support is in threaded connection with an adjusting screw rod, the lower end of the adjusting screw rod is rotatably connected with a first end plate, one end, far away from the valve core, of the valve rod is provided with a second end plate, and a first spring is connected between the first end plate and the second end plate.
Preferably, a first sliding chute and a second sliding chute are respectively arranged at two ends of the lever, a first sliding shaft is arranged on the follower rod, and the first sliding shaft is connected in the first sliding chute in a sliding manner; the valve rod is provided with a second sliding shaft which is connected in the second sliding groove in a sliding manner.
Preferably, a sealing ring is arranged between the valve rod and the guide sleeve.
Preferably, the guide sleeve is provided with an oil filling hole communicated with the lubricating oil cavity, and the oil filling hole is connected with a sealing plug. The oil filling hole is formed in the guide sleeve, so that lubricating oil can be conveniently injected into the lubricating oil cavity.
Preferably, a valve port sealing ring is arranged in the circumferential direction of the valve core; a plurality of second piston cavities are uniformly arranged in the circumferential direction of the valve core, the second piston cavities are positioned below the valve port sealing ring, a second piston is arranged in each second piston cavity, a fourth spring is arranged between each second piston and one end of each second piston cavity, and a second oil cavity is formed between each second piston and one end of each second piston cavity; the second piston is connected with a telescopic rod; the side surface of the valve core is provided with an elastic membrane in a surrounding manner, two ends of the elastic membrane are fixed on the side surface of the valve core through a hoop, and the telescopic rod is positioned between two ends of the elastic membrane; the middle of the valve core is provided with a first piston cavity, an opening of the first piston cavity faces downwards, a sealing plate is arranged at the opening of the first piston cavity, a first piston is arranged in the first piston cavity, a third spring is arranged between the first piston and one end of the first piston cavity, a first oil cavity is formed between the first piston and the sealing plate, the first oil cavity and the second oil cavity are connected through an oil duct, a mandril is connected to the first piston, the mandril downwards penetrates through a guide hole formed in the sealing plate, and a fixing rod corresponding to the mandril is arranged on the main valve body. The valve port sealing ring is opposite to the edge position of the valve port. When the valve port is opened, a medium flows from the front channel of the valve to the rear channel of the valve through the valve port, and the high-speed flowing medium can erode and erode the valve port sealing ring in the process of flowing through the valve port, so that the sealing capacity of the valve port sealing ring is easily reduced and even the valve port sealing ring is failed after long-time use. In the invention, the first oil chamber and the second oil chamber are filled with hydraulic oil. When the opening is opened, the valve core moves upwards relative to the valve port, the piston moves downwards under the action of the third spring, hydraulic oil in the first oil cavity is filled into the second oil cavity through the oil duct, the second piston and the telescopic rod are pushed to move towards the outer side of the valve core, the telescopic rod moves outwards, the elastic membrane is outwards stretched, the stretched elastic membrane is located below the valve port sealing ring, direct scouring of flowing media to the valve port sealing ring is prevented, scouring erosion effect of the media to the valve port sealing ring is greatly reduced, failure of the valve port sealing ring is effectively avoided, and the service life of the valve port sealing ring is prolonged. When the valve port is closed, the valve core descends, the mandril of the valve core is contacted with the fixed rod in the descending process, so that the first piston moves upwards in the first piston cavity, the hydraulic oil in the second oil cavity flows back to the first oil cavity through the oil duct, the telescopic rod retracts, and meanwhile, the elastic membrane also retracts to the initial state, so that the valve port sealing ring can be normally matched with the valve port.
Preferably, the valve port sealing ring is made of rubber.
The invention has the beneficial effects that: according to the invention, the lever mechanism is additionally arranged between the valve rod and the follower rod, and the lever can amplify the force of the follower rod and transmit the amplified force to the valve rod, so that the valve rod is driven to generate corresponding action by slight pressure change in a channel behind the valve, and the sensitivity of the self-control regulating valve is effectively improved.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Fig. 3 is an enlarged view of a portion b in fig. 2.
Fig. 4 is an enlarged view of a portion d in fig. 2.
Fig. 5 is a sectional view taken along the line a-a in fig. 2.
In the figure: 1. main valve body, 2, pre-valve channel, 3, post-valve channel, 4, valve port, 5, guide sleeve, 6, valve stem, 7, valve core, 8, adjusting bracket, 9, adjusting screw, 10, first end plate, 11, second end plate, 12, first spring, 13, box body, 14, vent, 15, diaphragm, 16, connecting plate, 17, follower rod, 18, second spring, 19, lever bracket, 20, lever, 21, first runner, 22, first sliding shaft, 23, second runner, 24, second sliding shaft, 25, valve port sealing ring, 26, fixing rod, 27, sealing ring, 28, lubricating oil chamber, 29, ball, 30, closing plate, 31, first piston, 32, first oil chamber, 33, third spring, 34, ejector rod, 35, oil channel, 36, connecting hole, 37, sealing plug, 38, second oil chamber, 39, second piston, 40, telescopic rod, 41, valve rod, Fourth spring, 42, elastic membrane, 43, hoop.
Detailed Description
The invention is further described by the following detailed description in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1 to 5, a high-sensitivity self-control micro-pressure regulating valve comprises a main valve body 1, wherein a front valve channel 2 and a rear valve channel 3 are arranged on the main valve body 1, and a valve port 4 is arranged between the front valve channel 2 and the rear valve channel 3. The main valve body 1 is provided with a guide sleeve 5, and a valve rod 6 is connected in the guide sleeve 5 in a sliding manner. A sealing ring 27 is arranged between the valve rod 6 and the guide sleeve 5. The seal ring 27 is made of rubber. One end of the valve rod 6 is provided with a valve core 7 matched with the valve port 4. The valve element 7 is disc-shaped. The other end of the valve stem 6 is provided with a second end plate 11. The main valve body 1 is provided with an adjusting support 8, the adjusting support 8 is in threaded connection with an adjusting screw rod 9, the lower end of the adjusting screw rod 9 is rotatably connected with a first end plate 10 opposite to a second end plate 11, and a first spring 12 is connected between the first end plate 10 and the second end plate 11.
An annular lubricating oil chamber 28 is arranged in the guide sleeve 5, and a plurality of ball grooves are arranged on the inner annular surface of the guide sleeve 5, and rotatable balls 29 are connected in the ball grooves. A connecting hole 36 is provided between the ball groove and the lubricating oil chamber. The guide sleeve 5 is provided with an oil filling hole communicating with the lubricating oil chamber 28, and a sealing plug 37 is connected to the oil filling hole. The ball is in rolling contact with the side face of the valve rod, and the ball can reduce friction between the guide sleeve and the valve rod. The lubricating oil cavity is filled with lubricating oil, and the lubricating oil can flow into the space between the ball and the surface of the ball groove through the connecting hole, so that the lubricating effect on the ball is achieved, and the friction between the ball and the surface of the ball groove during rolling is reduced. The oil filling hole is formed in the guide sleeve, so that lubricating oil can be conveniently injected into the lubricating oil cavity.
The main valve body 1 is provided with a feedback mechanism. The feedback mechanism comprises a housing 13, in which housing 13 a diaphragm 15 is arranged. The membrane 15 divides the box body into an upper membrane chamber and a lower membrane chamber. A follower rod 17 is connected on the box body 13 in a sliding way, one end of the follower rod 17 close to the membrane 15 is provided with a connecting plate 16, and the connecting plate 16 is connected with the membrane 15. A second spring 18 is arranged between the connecting plate and the box body 13. The box body 13 is provided with an air vent 14 communicating with the upper membrane chamber. The lower membrane chamber is connected with the valve rear channel through a pipeline, the medium pressure in the valve rear channel can act on the membrane, and the membrane pushes the follower rod to move, so that the follower rod can generate corresponding displacement along with the change of the medium pressure in the valve rear channel.
A lever bracket 19 is arranged on the main valve body 1, a lever 20 is rotatably connected on the lever bracket 19, one end of the lever 20 is slidably connected with the follower rod 17, and the other end of the lever 20 is slidably connected with the valve rod 6. The two ends of the lever 20 are respectively provided with a first sliding chute 21 and a second sliding chute 23, the follower rod 17 is provided with a first sliding shaft 22, and the first sliding shaft 22 is slidably connected in the first sliding chute 21. The valve rod 6 is provided with a second sliding shaft 24, and the second sliding shaft 24 is slidably connected in the second sliding chute 23.
A valve port sealing ring 25 is arranged in the circumferential direction of the valve core 7. The valve port seal 25 is made of rubber. A plurality of second piston cavities are uniformly arranged on the circumferential direction of the valve core 7, and the second piston cavities are arranged on the valve core 7 in an annular array mode. The second piston cavity is positioned below the valve port sealing ring. A second piston 39 is disposed in the second piston chamber, a fourth spring 41 is disposed between the second piston 39 and one end of the second piston chamber, and a second oil chamber 38 is formed between the second piston 39 and one end of the second piston chamber. The second piston 39 is connected to a telescopic rod 40. The side of the valve core 7 is provided with an elastic membrane 42 around. The elastic membrane 42 is made of a high-strength, high-elasticity material. The material of the elastic film 42 can be referred to patent publication No. CN 111212869A. The two ends of the elastic membrane 42 are fixed on the side surface of the valve core 7 through the hoop 43. The telescoping rod 40 is located between the ends of the elastic membrane 42. The middle of the valve core 7 is provided with a first piston cavity, and the opening of the first piston cavity faces downwards. A closing plate 30 is arranged at the opening of the first piston cavity, and a guide hole is formed in the closing plate 30. A first piston 31 is arranged in the first piston cavity, a third spring 33 is arranged between the first piston 31 and one end of the first piston cavity, a first oil cavity 32 is formed between the first piston 31 and the closing plate 30, and the first oil cavity 32 is connected with a second oil cavity 38 through an oil passage 35. The first piston 31 is connected to a ram 34, and the ram 34 passes downward through a guide hole provided in the closing plate 30. The main valve body 1 is provided with a fixing rod 26 corresponding to the stem 34. When the valve port is opened, a medium flows from the front channel of the valve to the rear channel of the valve through the valve port, and the high-speed flowing medium can erode and erode the valve port sealing ring in the process of flowing through the valve port, so that the sealing capacity of the valve port sealing ring is easily reduced and even the valve port sealing ring is failed after long-time use. In the invention, the first oil chamber and the second oil chamber are filled with hydraulic oil. When the opening is opened, the valve core moves upwards relative to the valve port, the piston moves downwards under the action of the third spring, hydraulic oil in the first oil cavity is filled into the second oil cavity through the oil duct, the second piston and the telescopic rod are pushed to move towards the outer side of the valve core, the telescopic rod moves outwards, the elastic membrane is outwards stretched, the stretched elastic membrane is located below the valve port sealing ring, direct scouring of flowing media to the valve port sealing ring is prevented, scouring erosion effect of the media to the valve port sealing ring is greatly reduced, failure of the valve port sealing ring is effectively avoided, and the service life of the valve port sealing ring is prolonged. When the valve port is closed, the valve core descends, the mandril of the valve core is contacted with the fixed rod in the descending process, so that the first piston moves upwards in the first piston cavity, the hydraulic oil in the second oil cavity flows back to the first oil cavity through the oil duct, the telescopic rod retracts, and meanwhile, the elastic membrane also retracts to the initial state, so that the valve port sealing ring can be normally matched with the valve port.
In the invention, the pressure change of the medium in the channel behind the valve acts on the follower rod through the feedback mechanism, so that the follower rod is subjected to a certain force to displace the follower rod, and the force applied to the follower rod is transmitted to the valve rod through the lever mechanism to drive the valve rod and the valve core to move, thereby changing the opening degree of the valve port. According to the invention, the lever mechanism is additionally arranged between the valve rod and the follower rod, and the lever can amplify the force of the follower rod and transmit the amplified force to the valve rod, so that the valve rod is driven to generate corresponding action by slight pressure change in a channel behind the valve, and the sensitivity of the self-control regulating valve is effectively improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A high-sensitivity self-control micro-pressure regulating valve comprises a main valve body, wherein a valve front channel and a valve rear channel are arranged on the main valve body, a valve port is arranged between the valve front channel and the valve rear channel, a valve rod is connected to the main valve body in a sliding manner, and one end of the valve rod is provided with a valve core matched with the valve port; the main valve body is provided with a feedback mechanism, the feedback mechanism is provided with a follower rod which moves along with the pressure change in the channel behind the valve, and the servo valve is characterized in that: a lever support is arranged on the main valve body, a lever is rotatably connected to the lever support, one end of the lever is connected with the follower rod in a sliding manner, and the other end of the lever is connected with the valve rod in a sliding manner; the main valve body is provided with a guide sleeve, the valve rod is connected in the guide sleeve in a sliding manner, an annular lubricating oil cavity is arranged in the guide sleeve, the inner annular surface of the guide sleeve is provided with a plurality of ball grooves, and rotatable balls are connected in the ball grooves; a connecting hole is arranged between the ball groove and the lubricating oil cavity.
2. The high-sensitivity automatic control micro-pressure regulating valve according to claim 1, wherein the feedback mechanism comprises a box body, a diaphragm is arranged in the box body, the diaphragm divides the box body into an upper diaphragm chamber and a lower diaphragm chamber, a follower rod is slidably connected to the box body, a connecting plate is arranged at one end of the follower rod away from the lever, the connecting plate is connected with the diaphragm, and a second spring is arranged between the connecting plate and the box body; the box body is provided with an air vent communicated with the upper membrane chamber.
3. The high-sensitivity automatic control micro-pressure regulating valve according to claim 1, wherein the main valve body is provided with an adjusting support, the adjusting support is in threaded connection with an adjusting screw, the lower end of the adjusting screw is rotatably connected with a first end plate, one end of the valve rod, which is far away from the valve core, is provided with a second end plate, and a first spring is connected between the first end plate and the second end plate.
4. The high-sensitivity automatic control micro-pressure regulating valve according to claim 1, wherein a first sliding groove and a second sliding groove are respectively arranged at two ends of the lever, a first sliding shaft is arranged on the follower rod, and the first sliding shaft is slidably connected in the first sliding groove; the valve rod is provided with a second sliding shaft which is connected in the second sliding groove in a sliding manner.
5. The high-sensitivity automatic control micro-pressure regulating valve according to claim 1, wherein a sealing ring is arranged between the valve rod and the guide sleeve.
6. The high-sensitivity automatic control micro-pressure regulating valve as claimed in claim 1, wherein the guide sleeve is provided with an oil filling hole communicated with the lubricating oil chamber, and the oil filling hole is connected with a sealing plug.
7. The high-sensitivity automatic control micro-pressure regulating valve according to claim 1, characterized in that a valve port sealing ring is arranged in the circumferential direction of the valve core; a plurality of second piston cavities are uniformly arranged in the circumferential direction of the valve core, the second piston cavities are positioned below the valve port sealing ring, a second piston is arranged in each second piston cavity, a fourth spring is arranged between each second piston and one end of each second piston cavity, and a second oil cavity is formed between each second piston and one end of each second piston cavity; the second piston is connected with a telescopic rod; the side surface of the valve core is provided with an elastic membrane in a surrounding manner, two ends of the elastic membrane are fixed on the side surface of the valve core through a hoop, and the telescopic rod is positioned between two ends of the elastic membrane; the middle of the valve core is provided with a first piston cavity, an opening of the first piston cavity faces downwards, a sealing plate is arranged at the opening of the first piston cavity, a first piston is arranged in the first piston cavity, a third spring is arranged between the first piston and one end of the first piston cavity, a first oil cavity is formed between the first piston and the sealing plate, the first oil cavity and the second oil cavity are connected through an oil duct, a mandril is connected to the first piston, the mandril downwards penetrates through a guide hole formed in the sealing plate, and a fixing rod corresponding to the mandril is arranged on the main valve body.
8. The high-sensitivity self-controlled micro-pressure regulating valve according to claim 7, wherein the valve port sealing ring is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011180050.4A CN112392965B (en) | 2020-10-29 | 2020-10-29 | High-sensitivity automatic control micro-pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011180050.4A CN112392965B (en) | 2020-10-29 | 2020-10-29 | High-sensitivity automatic control micro-pressure regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112392965A true CN112392965A (en) | 2021-02-23 |
| CN112392965B CN112392965B (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011180050.4A Active CN112392965B (en) | 2020-10-29 | 2020-10-29 | High-sensitivity automatic control micro-pressure regulating valve |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363931A (en) * | 2015-12-04 | 2016-03-02 | 苏州广硕精密电子有限公司 | Self-lubricated guide post and guide sleeve component |
| CN207848519U (en) * | 2018-01-19 | 2018-09-11 | 浙江金锋自动化仪表有限公司 | Piloted reducer |
| CN209797224U (en) * | 2019-03-13 | 2019-12-17 | 杭州永利百合实业有限公司 | Driving chain |
| CN210716175U (en) * | 2019-07-26 | 2020-06-09 | 浙江三方控制阀股份有限公司 | Pressure adjusting device with cutting-off function |
| CN211203151U (en) * | 2019-11-06 | 2020-08-07 | 湖北三六一一应急装备有限公司 | Steel wire rope assembly |
-
2020
- 2020-10-29 CN CN202011180050.4A patent/CN112392965B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363931A (en) * | 2015-12-04 | 2016-03-02 | 苏州广硕精密电子有限公司 | Self-lubricated guide post and guide sleeve component |
| CN207848519U (en) * | 2018-01-19 | 2018-09-11 | 浙江金锋自动化仪表有限公司 | Piloted reducer |
| CN209797224U (en) * | 2019-03-13 | 2019-12-17 | 杭州永利百合实业有限公司 | Driving chain |
| CN210716175U (en) * | 2019-07-26 | 2020-06-09 | 浙江三方控制阀股份有限公司 | Pressure adjusting device with cutting-off function |
| CN211203151U (en) * | 2019-11-06 | 2020-08-07 | 湖北三六一一应急装备有限公司 | Steel wire rope assembly |
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|---|---|
| CN112392965B (en) | 2022-11-25 |
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