CN115234695A - Piezoelectric impact type pneumatic digital flow valve - Google Patents
Piezoelectric impact type pneumatic digital flow valve Download PDFInfo
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- CN115234695A CN115234695A CN202211098651.XA CN202211098651A CN115234695A CN 115234695 A CN115234695 A CN 115234695A CN 202211098651 A CN202211098651 A CN 202211098651A CN 115234695 A CN115234695 A CN 115234695A
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- 239000000919 ceramic Substances 0.000 claims abstract description 40
- 238000009527 percussion Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 230000033001 locomotion Effects 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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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
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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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
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a piezoelectric impact pneumatic digital flow valve, which comprises: the valve core is arranged in the right valve body, one end of the valve core is provided with a left corrugated diaphragm, and the other end of the valve core is provided with a right corrugated diaphragm; one end of the piezoelectric ceramic driver is fixedly connected with the left valve cover, and the output end of the piezoelectric ceramic driver is contacted with the left corrugated diaphragm; and an adjusting screw is arranged on the right valve cover, a spring is arranged on the screw, and one end of the spring is in contact with the right corrugated diaphragm. The invention makes the piezoelectric ceramic driver rapidly extend out to impact the valve core to move by controlling the pulse voltage, so that the valve core obtains larger displacement output, and then the valve core returns to the original position to contact the piezoelectric ceramic driver again under the action of the spring force. The reciprocating motion of the valve core is realized by controlling the number of pulse voltages, the regular output flow of the digital valve is controlled, and the digital control of the valve flow is realized.
Description
Technical Field
The invention relates to the technical field of pneumatic flow valves, in particular to a piezoelectric impact type pneumatic digital flow valve.
Background
Pneumatic transmission systems are widely used in the field of industrial automation because of their low cost, non-polluting, safe and reliable characteristics. The pneumatic flow valve is a key element of a pneumatic transmission system for adjusting the output speed of an actuator. With the development and application of computer technology, the digitization of valves has become a necessary trend. The current digital valves can be divided into: incremental digital valves (stepper motor type) and on-off digital valves. However, the electro-mechanical converter is generally a stepping motor or a high-speed electromagnet, which has the disadvantages of slow response time, poor steady-state accuracy and the like, and is greatly limited in applications where fast response or high control accuracy is required, and high safety and reliability are required.
The piezoelectric ceramic driver provides a good electromechanical converter for researching a novel high-speed high-precision pneumatic digital valve due to the characteristics of simple structure, high control precision, high response speed and the like, and the piezoelectric digital valve is researched more and more.
The common piezoelectric digital valves can be divided into two types, one type is a direct drive type, for example, the patent application number CN201510346242 "piezoelectric valve" directly controls the opening or closing of the valve by using a piezoelectric crystal piece, and has the advantages of simple structure and light weight; however, the flow rate to be controlled is small and does not meet the actual requirement. The other type is an amplification driving type, which mainly utilizes an elastic hinge amplification mechanism, a hydraulic amplification mechanism and the like to amplify the output displacement of the piezoelectric ceramic driver so as to improve the output flow of the piezoelectric valve. For example, patent application No. CN201921478593.7 "a liquid transmission stroke amplification type piezoelectric switching valve" utilizes hydraulic pressure to amplify the output displacement of piezoelectric ceramics to improve the output flow rate of the valve, but has the disadvantages of complicated structure, large volume, and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the piezoelectric impact type pneumatic digital flow valve, which realizes the digital control of the valve flow and has the advantages of simple structure and small volume.
In order to achieve the purpose, the invention adopts the following technical scheme: a piezoelectric impact pneumatic digital flow valve comprising: the diaphragm valve core assembly is arranged in the right valve body; one end of the piezoelectric ceramic driver is fixedly connected with the left valve cover, and the output end of the piezoelectric ceramic driver is contacted with one end of the diaphragm valve core component; and an adjusting screw is arranged on the right valve cover, a spring is arranged on the screw, and one end of the spring is in contact with the other end of the diaphragm valve core assembly.
Further, the diaphragm valve spool assembly includes: the piezoelectric ceramic driver comprises a valve core, a right corrugated diaphragm and a left corrugated diaphragm, wherein the left corrugated diaphragm is arranged at one end of the valve core, the right corrugated diaphragm is arranged at the other end of the valve core, the output end of the piezoelectric ceramic driver is in contact with the left corrugated diaphragm, and one end of the spring is in contact with the right corrugated diaphragm.
Furthermore, a first flow passage, a second flow passage, a third flow passage and a cavity are arranged inside the right valve body, a compressed air input IN port is arranged at the upper end of the first flow passage, and a pipe orifice at the lower end of the first flow passage is connected with the cavity; the upper end pipe orifice of the second flow passage is connected with the first flow passage, and the lower end pipe orifice of the second flow passage is connected with the chamber; and the lower end of the third flow passage is provided with a compressed air output OUT port, and the upper end pipe orifice of the third flow passage is connected with the cavity.
Further, the first flow passage and the third flow passage are both vertical pipes, and the second flow passage is an L-shaped pipe.
Furthermore, a valve core is arranged in the cavity, a shaft shoulder is arranged in the middle of the valve core and is in contact with the wall surface of the cavity, the cavity is divided into a left cavity and a right cavity, a lower end pipe orifice of the first flow passage is positioned in the left cavity, and a lower end pipe orifice of the second flow passage is positioned in the right cavity; and the valve core shaft shoulder is positioned at the pipe orifice at the upper end of the third pipeline.
Further, the length of the shaft shoulder of the valve core is larger than the diameter of the third pipeline.
Furthermore, left side ripple diaphragm, right ripple diaphragm all set up in the cavity of right valve body, the cavity is stretched out around the left side ripple diaphragm to fix between right valve body, left valve body, the cavity is stretched out around the right side ripple diaphragm to fix between right valve body and right valve cover.
Further, the piezoelectric ceramic driver is fixedly connected with the left valve cover through a second screw.
Further, the right valve body, the left valve body and the left valve cover are fixedly connected with each other through first screws.
Further, the right valve cover is fixedly connected with the right valve body through a third screw.
Compared with the prior art, the invention has the following beneficial effects: the piezoelectric impact type pneumatic digital flow valve disclosed by the invention has the advantages that the piezoelectric ceramic driver is utilized to rapidly extend out of the impact valve core to move, so that the valve core obtains larger displacement output, and the output displacement of the piezoelectric ceramic driver is indirectly amplified; according to the invention, the left side of the valve core is provided with the left corrugated diaphragm, and the right end of the valve core is provided with the right corrugated diaphragm, so that the valve core can still keep stable motion under impact; in order to reduce the influence of air pressure on the movement of the valve core, a double-inlet pipeline of a first flow channel and a second flow channel and an air pressure offset mode of double diaphragms are adopted; in the invention, the adjusting screw is arranged on the right valve cover, the spring is arranged between the chamber and the right corrugated diaphragm, the valve core returns to the original position by the spring force to be contacted with the piezoelectric ceramic driver again, and the secondary impact of the piezoelectric ceramic driver is waited; the invention controls the reciprocating motion of the valve core by controlling the number of pulses, thereby controlling the regular output flow of the digital valve and realizing the digital control of the valve flow. The piezoelectric impact pneumatic digital flow valve has the characteristics of simple structure and large output flow.
Drawings
FIG. 1 is a schematic diagram of a piezoelectric impact pneumatic digital flow valve of the present invention with the valve cartridge closed;
FIG. 2 is a schematic diagram of a piezoelectric impact pneumatic digital flow valve of the present invention with the valve spool open;
FIG. 3 is a three-dimensional cross-sectional view of a piezoelectric impulse pneumatic digital flow valve of the present invention;
wherein, 1-right valve cover; 2-right valve body; 3-a left valve body; 4-left valve cover; 5-a first screw; 6-piezoelectric ceramic driver; 7-a second screw; 8-left corrugated diaphragm; 9-a valve core; 10-a third screw; 11-right corrugated diaphragm; 12-an adjusting screw; 13-spring.
Detailed Description
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto. It should be noted that the terms "upper", "lower", "left" and "right" used in the present invention are only used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship changes or adjustments may be made without substantial technical changes and modifications.
Referring to fig. 1-3, the present invention provides a piezoelectric impact pneumatic digital flow valve comprising: right valve gap 1, right valve body 2, left valve body 3, left valve gap 4, piezoceramics driver 6, diaphragm case subassembly, adjusting screw 12, spring 13, right valve gap 1, right valve body 2, left valve body 3, left valve gap 4 fixed connection in proper order, specifically, right valve body 2, left valve body 3, left valve gap 4 are through 5 mutual fixed connection of first screw, and right valve gap 1 passes through third screw 10 fixed connection with right valve body 2. The diaphragm valve core assembly is arranged in the right valve body 2, one end of the piezoelectric ceramic driver 6 is fixedly connected with the left valve cover 4, and specifically, the piezoelectric ceramic driver 6 is fixedly connected with the left valve cover 4 through a second screw 7; the output end of the piezoelectric ceramic driver 6 is in contact with one end of the diaphragm valve core assembly, when the piezoelectric ceramic driver 6 is under the action of pulse voltage, the diaphragm valve core assembly is quickly impacted, so that the diaphragm valve core assembly obtains a larger speed, is separated from the piezoelectric ceramic driver 6 and moves to the right, and the diaphragm valve core assembly obtains larger displacement output, thereby indirectly amplifying the output displacement of the piezoelectric ceramic driver; be equipped with adjusting screw 12 on the right side valve gap 1, be equipped with spring 13 on the screw 12, through adjusting screw 12 for the one end of spring 13 contacts with the other end of diaphragm case subassembly, specifically, in order to guarantee that case 9 still can the steady motion under the impact, the diaphragm case subassembly includes: the piezoelectric ceramic driver comprises a valve core 9, a right corrugated diaphragm 11 and a left corrugated diaphragm 8, wherein the left corrugated diaphragm 8 is arranged at one end of the valve core 9, the right corrugated diaphragm 11 is arranged at the other end of the valve core 9, the output end of the piezoelectric ceramic driver 6 is in contact with the left corrugated diaphragm 8, one end of a spring 13 is in contact with the right corrugated diaphragm 11, the valve core 9 returns to the original position through spring force to be in contact with the piezoelectric ceramic driver 6 again, and the secondary impact of the piezoelectric ceramic driver 6 is waited. The invention controls the reciprocating motion of the valve core by controlling the number of pulses, thereby controlling the regular output flow of the digital valve and realizing the digital control of the valve flow.
A first flow channel 2-1, a second flow channel 2-2, a third flow channel 2-3 and a chamber 2-4 are arranged inside a right valve body 2, the first flow channel 2-1 and the third flow channel 2-3 are both vertical pipes, the second flow channel 2-2 is an L-shaped pipe, and the upper end of the first flow channel 2-1 is provided with a compressed air input IN port; the upper end pipe orifice of the second flow passage 2-2 is connected with the first flow passage 2-1, and the lower end pipe orifice of the second flow passage 2-2 is connected with the chamber 2-4; the lower end of the third flow passage 2-3 is provided with a compressed air output OUT port. A valve core 9 is arranged in the cavity 2-4, a shaft shoulder is arranged in the middle of the valve core 9 and is in contact with the wall surface of the cavity 2-4, the cavity 2-4 is divided into a left cavity and a right cavity, the lower end pipe orifice of the first flow passage 2-1 is positioned in the left cavity, and the lower end pipe orifice of the second flow passage 2-2 is positioned in the right cavity; the shaft shoulder of the valve core 9 is positioned at the pipe orifice at the upper end of the third pipeline 2-3, and the length of the shaft shoulder is larger than the diameter of the third pipeline 2-3. Through the arrangement of the flow channel, the air pressure of the left cavity and the air pressure of the right cavity to the diaphragm valve core assembly are mutually offset, and the resistance of the valve core movement is reduced, so that larger valve core movement displacement is obtained. Meanwhile, in the initial position, as shown in fig. 1, the shoulder of the spool 9 completely blocks the third passage 2-3, so that the gas in the chamber 9 cannot flow OUT of the OUT port through the third passage 2-3.
According to the invention, a left corrugated diaphragm 8 and a right corrugated diaphragm 11 are arranged in a cavity 2-4 of a right valve body 2, the periphery of the left corrugated diaphragm 8 extends out of the cavity 2-4 and is fixed between the right valve body 2 and the left valve body 3, the periphery of the right corrugated diaphragm 11 extends out of the cavity 2-4 and is fixed between the right valve body 2 and a right valve cover 1, the stability of the left end and the right end of a valve core 9 is kept through the fixation of the peripheries of the left corrugated diaphragm 8 and the right corrugated diaphragm 11, and the micro-motion of the valve core 9 is realized by means of the deformation of the corrugated part of the diaphragms; meanwhile, due to the sealing performance of the left corrugated diaphragm 8 and the right corrugated diaphragm 11, the gas in the chambers 2-4 is ensured not to leak to the outside, and the defects of large friction force, easy leakage and the like of the traditional slide valve core are avoided.
The working process of the piezoelectric impact type pneumatic digital flow valve comprises the following steps: when the piezoelectric ceramic driver 6 is not applied with voltage, as shown in fig. 1, the diaphragm valve core assembly is in contact with the piezoelectric ceramic driver 6, the shaft shoulder of the valve core 9 completely blocks the third channel 2-3, and at this time, the valve core 9 is in a closed state, and no compressed air is output from the OUT port of the third channel 2-3; applying a voltage pulse signal to the piezoelectric ceramic driver 6, wherein the piezoelectric ceramic driver 6 rapidly extends OUT of the impact diaphragm valve core assembly to enable the diaphragm valve core assembly to obtain a higher speed, separate from the piezoelectric ceramic driver 6 and move to the right, so that a shaft shoulder of the valve core 9 is separated from an upper end pipe orifice B of the third pipeline 2-3, at the moment, the valve core is IN an open state, as shown IN fig. 2, compressed air flows through an upper end pipe orifice B of the third pipeline 2-3 from an IN port through a lower end pipe orifice A1 of the first pipeline 2-1, and flows OUT from an OUT port of the third channel 2-3 from the compressed air output; then, under the action of the spring 13, the valve core 9 is restored to the original position to be contacted with the piezoelectric ceramic driver 6, the valve core 9 is closed, no flow is output, and the impact of the piezoelectric ceramic driver is waited for again.
The invention controls the valve core 9 to reciprocate by the pulse number applied by the piezoelectric ceramic driver 6, controls the valve core 9 to open and close, thereby controlling the regular output flow of the digital valve, realizing the digital control of the valve flow, and having the characteristics of small volume, simple structure and large output flow.
The above are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that fall under the spirit of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (10)
1. A piezoelectric impact pneumatic digital flow valve, comprising: the diaphragm valve comprises a right valve cover (1), a right valve body (2), a left valve body (3), a left valve cover (4), a piezoelectric ceramic driver (6), a diaphragm valve core assembly, an adjusting screw (12) and a spring (13), wherein the right valve cover (1), the right valve body (2), the left valve body (3) and the left valve cover (4) are sequentially and fixedly connected, and the diaphragm valve core assembly is arranged in the right valve body (2); one end of the piezoelectric ceramic driver (6) is fixedly connected with the left valve cover (4), and the output end of the piezoelectric ceramic driver (6) is contacted with one end of the diaphragm valve core assembly; an adjusting screw (12) is arranged on the right valve cover (1), a spring (13) is arranged on the screw (12), and one end of the spring (13) is in contact with the other end of the diaphragm valve core assembly.
2. A piezoelectric percussion pneumatic digital flow valve according to claim 1, in which the diaphragm spool assembly comprises: the piezoelectric ceramic driver comprises a valve core (9), a right corrugated diaphragm (11) and a left corrugated diaphragm (8), wherein the left corrugated diaphragm (8) is arranged at one end of the valve core (9), the right corrugated diaphragm (11) is arranged at the other end of the valve core (9), the output end of the piezoelectric ceramic driver (6) is in contact with the left corrugated diaphragm (8), and one end of a spring (13) is in contact with the right corrugated diaphragm (11).
3. The piezoelectric impact type pneumatic digital flow valve according to claim 1, characterized IN that a first flow channel (2-1), a second flow channel (2-2), a third flow channel (2-3) and a chamber (2-4) are arranged inside the right valve body (2), a compressed air input IN port is arranged at the upper end of the first flow channel (2-1), and a lower end pipe port of the first flow channel (2-1) is connected with the chamber (2-4); an upper end pipe orifice of the second flow passage (2-2) is connected with the first flow passage (2-1), and a lower end pipe orifice of the second flow passage (2-2) is connected with the chamber (2-4); the lower end of the third flow channel (2-3) is provided with a compressed air output OUT port.
4. The piezoelectric impact type pneumatic digital flow valve according to claim 3, characterized in that the first flow channel (2-1) and the third flow channel (2-3) are both vertical tubes, and the second flow channel (2-2) is an L-shaped tube.
5. The piezoelectric impact type pneumatic digital flow valve according to claim 3, characterized in that a valve core (9) is arranged in the chamber (2-4), a shaft shoulder is arranged in the middle of the valve core (9) and is contacted with the wall surface of the chamber (2-4) to divide the chamber (2-4) into a left chamber and a right chamber, the lower end pipe orifice of the first flow passage (2-1) is positioned in the left chamber, and the lower end pipe orifice of the second flow passage (2-2) is positioned in the right chamber; and the shaft shoulder of the valve core (9) is positioned at the pipe orifice at the upper end of the third pipeline (2-3).
6. Piezoelectric impact pneumatic digital flow valve according to claim 5, characterized in that the length of the shoulder of the spool (9) is greater than the diameter of the third conduit (2-3).
7. The piezoelectric impact type pneumatic digital flow valve according to claim 1, wherein the left corrugated diaphragm (8) and the right corrugated diaphragm (11) are both arranged in a cavity (2-4) of the right valve body (2), the periphery of the left corrugated diaphragm (8) extends out of the cavity (2-4) and is fixed between the right valve body (2) and the left valve body (3), and the periphery of the right corrugated diaphragm (11) extends out of the cavity (2-4) and is fixed between the right valve body (2) and the right valve cover (1).
8. Piezoelectric impact pneumatic digital flow valve according to claim 1, characterised in that the piezoceramic driver (6) is fixedly connected with the left valve cap (4) by means of a second screw (7).
9. Piezoelectric impact pneumatic digital flow valve according to claim 1, characterized in that the right valve body (2), the left valve body (3), the left valve cover (4) are fixedly connected to each other by first screws (5).
10. Piezoelectric impact pneumatic digital flow valve according to claim 1, characterized by the fact that the right valve cover (1) is fixedly connected to the right valve body (2) by means of third screws (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211098651.XA CN115234695A (en) | 2022-09-09 | 2022-09-09 | Piezoelectric impact type pneumatic digital flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211098651.XA CN115234695A (en) | 2022-09-09 | 2022-09-09 | Piezoelectric impact type pneumatic digital flow valve |
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| CN115234695A true CN115234695A (en) | 2022-10-25 |
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| CN202211098651.XA Pending CN115234695A (en) | 2022-09-09 | 2022-09-09 | Piezoelectric impact type pneumatic digital flow valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121487A (en) * | 2011-03-04 | 2011-07-13 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| EP2489412A2 (en) * | 2011-02-17 | 2012-08-22 | Minimax GmbH & Co KG | Valve |
| CN103016434A (en) * | 2012-12-20 | 2013-04-03 | 北京航空航天大学 | Piezoelectric ceramic direct-driving servo valve based on hydraulic micro-displacement amplification structure |
| CN203516832U (en) * | 2013-08-22 | 2014-04-02 | 重庆达腾科技发展有限公司 | Two-position three-way valve for wellhead safety control system |
| CN105299261A (en) * | 2014-06-20 | 2016-02-03 | 比尔克特韦尔克有限公司 | Slide valve |
| CN214305407U (en) * | 2021-01-27 | 2021-09-28 | 北京宏基世达液压有限公司 | Pilot-operated type electric control three-way pressure reducing valve |
-
2022
- 2022-09-09 CN CN202211098651.XA patent/CN115234695A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2489412A2 (en) * | 2011-02-17 | 2012-08-22 | Minimax GmbH & Co KG | Valve |
| CN102121487A (en) * | 2011-03-04 | 2011-07-13 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| CN103016434A (en) * | 2012-12-20 | 2013-04-03 | 北京航空航天大学 | Piezoelectric ceramic direct-driving servo valve based on hydraulic micro-displacement amplification structure |
| CN203516832U (en) * | 2013-08-22 | 2014-04-02 | 重庆达腾科技发展有限公司 | Two-position three-way valve for wellhead safety control system |
| CN105299261A (en) * | 2014-06-20 | 2016-02-03 | 比尔克特韦尔克有限公司 | Slide valve |
| CN214305407U (en) * | 2021-01-27 | 2021-09-28 | 北京宏基世达液压有限公司 | Pilot-operated type electric control three-way pressure reducing valve |
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