CN111692149B - Stacked three-way flow valve - Google Patents
Stacked three-way flow valve Download PDFInfo
- Publication number
- CN111692149B CN111692149B CN202010449270.6A CN202010449270A CN111692149B CN 111692149 B CN111692149 B CN 111692149B CN 202010449270 A CN202010449270 A CN 202010449270A CN 111692149 B CN111692149 B CN 111692149B
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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
- 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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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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
- F15B13/026—Pressure compensating valves
Abstract
The invention provides a stacked three-way flow valve, which belongs to the technical field of three-way flow valves and comprises the following components: the valve comprises a valve body, a flow regulating valve core and a pressure compensating valve core, wherein a valve hole is arranged in the valve body, the valve hole comprises an oil outlet cavity, a first channel, an oil inlet cavity, a second channel, an oil return cavity, a third channel and a bottom cavity which are sequentially connected, a first through hole is formed in the flow regulating valve core, a second through hole is formed in the pressure compensating valve core, the flow regulating valve core is arranged in the oil inlet cavity and the oil outlet cavity, the first through hole is located in the first channel, the pressure compensating valve core is arranged in the oil inlet cavity, the oil return cavity and the bottom cavity, the third channel is sealed, and the second through hole is located in the second channel. The invention has the beneficial effects that: the pressure compensation effect is good, stable flow can be maintained, inlet pressure difference change is small, and the speed of the actuating element can be accurately controlled.
Description
Technical Field
The invention belongs to the technical field of three-way flow valves, and relates to a stacked three-way flow valve.
Background
The three-way flow valve is a combined valve formed by connecting an overflow valve and a throttle valve in series, and can adjust the operation speed of an actuating element. The throttle valve is used for adjusting the flow, and the constant-difference overflow valve automatically compensates the influence of load change, so that the pressure difference between the front part and the rear part of the throttle valve is constant, and the influence of the load change on the flow is eliminated.
The pressure in front of and behind the throttle valve is respectively led to the right end and the left end of the valve core of the overflow valve, when the load pressure is increased, the hydraulic pressure acting on the left end of the overflow valve core is increased, the valve core moves to the right, the overflow port is reduced, the inlet pressure is increased, and therefore the differential pressure of the throttle valve is kept unchanged; and vice versa. Thus, the flow of the three-way flow valve is constant (not influenced by load).
For example, a chinese patent with application number 200810041942.9 discloses a novel stacked three-way flow valve, which comprises a stacked valve body, and is characterized in that two ends of the stacked valve body are respectively provided with a hole for a plug-in component, and the plug-in component is arranged in the hole for the plug-in component; and a sealing ring plate is arranged below the superposed valve body, a sealing ring is arranged in a hole of the sealing ring plate, and the plug-in assembly is formed by a throttling mechanism and a pressure reducing mechanism which are distributed according to the same axis.
The above-mentioned governor valve is also a three-way flow valve, and its pressure compensation effect is poor, so that it can not maintain stable flow rate, and its inlet pressure difference can be obviously changed, and can not accurately control speed of actuator.
Disclosure of Invention
The invention aims to provide a stacked three-way flow valve aiming at the problems in the prior art.
The purpose of the invention can be realized by the following technical scheme: a stacked, three-way flow valve comprising:
the oil outlet cavity is communicated with the oil outlet cavity, the oil return hole is communicated with the oil return cavity, one end of the connecting hole is communicated with the bottom cavity, and the other end of the connecting hole is communicated with the oil outlet hole;
a flow regulating valve core provided with a first through hole, the flow regulating valve core being disposed in the oil inlet chamber and the oil outlet chamber and the first through hole being located in the first passage;
and the pressure compensation valve core is provided with a second through hole, the pressure compensation valve core is arranged in the oil inlet cavity, the oil return cavity and the bottom cavity and seals the third channel, and the second through hole is positioned in the second channel.
Preferably, the valve body is provided with a valve seat and a knob, the valve seat is connected with the valve body, the knob is rotatably connected to the valve seat, and the knob is in linkage connection with the flow regulating valve core.
Preferably, the valve body is further provided with a top rod and an adjusting screw rod, the valve seat is provided with a threaded hole, the threaded hole is communicated with the valve hole, the adjusting screw rod is connected with the threaded hole, the top rod is fixedly connected with the adjusting screw rod, the top rod penetrates into the valve hole and is in abutting connection with the flow regulating valve core, and the knob is connected with the adjusting screw rod and used for driving the adjusting screw rod to rotate.
Preferably, sealing rings are arranged between the valve seat and the valve body, between the knob and the valve seat and between the valve seat and the ejector rod.
Preferably, a plug screw is arranged in the bottom cavity, a spring is arranged on the plug screw, and the spring is in abutting connection with the pressure compensation valve core.
Preferably, the flow rate regulating valve core is of a tubular structure and comprises a first pipe body and a second pipe body, wherein the first pipe body is connected with the second pipe body, and a first isolating part is arranged between the first pipe body and the second pipe body.
Preferably, the ejector rod penetrates through the first pipe body and is in abutting connection with the first isolation portion, the second pipe body is located in the first channel, and the first through hole is formed in the wall surface of the second pipe body.
Preferably, the pressure compensation valve core is of a tubular structure and comprises a third pipe body and a fourth pipe body, wherein the third pipe body is connected with the fourth pipe body, and a second isolation part is formed between the third pipe body and the fourth pipe body.
Preferably, the third tube is located in the second channel, the second through hole is formed in a wall surface of the third tube, and the fourth tube is sealed in the third channel and is communicated with the bottom cavity.
Compared with the prior art, the invention has the beneficial effects that:
1. the pressure compensation effect is good, stable flow can be maintained, inlet pressure difference change is small, and the speed of the actuating element can be accurately controlled.
2. The pressure compensation valve core can be plugged on the second channel through the spring, when the pressure of the inlet is overlarge, the spring is compressed, so that liquid can enter the oil return cavity and then flow back to the oil tank, and along with the increase or reduction of the pressure, the compression amount of the spring is different, so that the size of an opening between the second through hole and the second channel is controlled.
3. Because the connecting hole is communicated with the bottom cavity and the oil outlet, the pressure of the bottom cavity is the pressure of the oil outlet cavity plus the elastic force of the spring, namely the pressure of the bottom cavity is the pressure of the oil inlet cavity, so that the influence of load change can be automatically compensated, the pressure difference before and after throttling is a fixed value, and the influence of the load change on the flow is eliminated.
4. The pressure compensation valve core can also move along the axial direction, is approximately positioned in the oil outlet cavity, the oil return cavity and the bottom cavity, and is plugged in the third channel, so that the bottom cavity is isolated from the oil return cavity.
5. The fourth pipe body is used for plugging the third channel, liquid in the bottom cavity enters the fourth pipe body, so that upward thrust is applied to the pressure compensation valve core, the liquid enters the third pipe body from the oil inlet cavity and pushes the pressure compensation valve core downwards, the second through hole is communicated with the oil return cavity, the pressure difference between the oil inlet hole and the oil outlet hole is constant, and the influence of load change on flow is eliminated.
Drawings
FIG. 1 is a schematic structural view of a stacked three-way flow valve of the present invention.
Fig. 2 is a schematic structural view of a valve hole of the present invention.
FIG. 3 is a schematic view of the connection relationship between the connection holes and the oil outlet holes of the present invention.
FIG. 4 is a schematic diagram of the position of the oil inlet hole of the present invention.
FIG. 5 is a schematic view of the location of the oil outlet holes of the present invention.
In the figure, 100, valve body; 110. a valve seat; 111. a threaded hole; 120. a top rod; 130. a knob; 140. adjusting the screw rod; 150. an oil inlet hole; 160. an oil outlet hole; 170. an oil return hole; 180. connecting holes; 200. a valve bore; 210. an oil inlet cavity; 220. a first channel; 230. an oil outlet cavity; 240. a second channel; 250. an oil return cavity; 260. a third channel; 270. a bottom cavity; 300. a flow regulating valve core; 310. a first through hole; 320. a first pipe body; 330. a second tube body; 340. a first isolation section; 400. a pressure compensating spool; 410. a second through hole; 420. a third tube; 430. a fourth tube body; 440. a second isolation portion; 500. a plug screw; 600. a spring; 700. and (5) sealing rings.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 and fig. 2, a stacked three-way flow valve includes: the three-way flow valve is a valve formed by connecting an overflow valve and a throttle valve in series, and can adjust the running speed of a load element during specific work; the flow regulating valve core 300 and the pressure compensating valve core 400 are matched together, so that pressure is automatically compensated when the flow is regulated, and the pressure difference between the inlet and the outlet is kept at a constant value.
The valve hole 200 is a vertical hole structure which is actually arranged along the valve body 100, the valve hole 200 is an oil outlet cavity 230, a first channel 220, an oil inlet cavity 210, a second channel 240, an oil return cavity 250, a third channel 260 and a bottom cavity 270 which are sequentially connected, the valve hole 200 is formed by sequentially arranging the oil outlet cavity 230, the first channel 220, the oil inlet cavity 210, the second channel 240, the oil return cavity 250, the third channel 260 and the bottom cavity 270 from top to bottom, and adjacent cavities or channels are communicated and are arranged into the shaft-shaped valve hole 200.
The flow rate adjustment valve core 300 is provided with a first through hole 310, the pressure compensation valve core 400 is provided with a second through hole 410, and the first through hole 310 and the second through hole 410 are respectively arranged on the wall surface of the flow rate adjustment valve core 300 and the wall surface of the pressure compensation valve core 400.
The flow rate adjustment valve core 300 is disposed in the oil inlet chamber 210 and the oil outlet chamber 230, the first through hole 310 is located in the first channel 220, the flow rate adjustment valve core 300 can move in the axial direction, and is approximately located in the oil inlet chamber 210 and the oil outlet chamber 230, because the first channel 220 also seals the first through hole 310, after the liquid enters the oil inlet chamber 210, the liquid can enter the oil outlet chamber 230 only through the first through hole 310, a part of the first through hole 310 is communicated with the oil outlet chamber 230, and the other part of the first through hole is abutted against the first channel 220, when the flow rate adjustment valve core 300 moves in the axial direction, the area of the first channel 310 corresponding to the oil outlet chamber 230 is changed, thereby achieving the purpose of flow rate adjustment.
The pressure compensating spool 400 is disposed in the oil inlet chamber 210, the oil return chamber 250, and the bottom chamber 270 and is sealed by the third passage 260, and the second through hole 410 is located in the second passage 240.
Preferably, the pressure compensating valve core 400 can also move axially, and is approximately located in the oil outlet cavity 230, the oil return cavity 250 and the bottom cavity 270, and the pressure compensating valve core 400 blocks the third channel 260, so as to isolate the bottom cavity 270 from the oil return cavity 250, and the pressure compensating valve core 400 is further blocked in the second channel 240, and the second through hole 410 can guide the liquid in the oil inlet cavity 210 to the oil return cavity 250, so as to return a part of the liquid to the oil tank, and since the pressure compensating valve core 400 can move axially, i.e. towards the oil return cavity 250 or the oil inlet cavity 210, the pressure compensating effect can be achieved, and the pressure difference between the oil inlet cavity 210 and the oil outlet cavity 230 can be kept constant, and the structure is ingenious, the pressure compensating effect is good, a stable flow can be maintained, the change of the inlet pressure difference is small, and the speed of the actuator can be controlled accurately.
As shown in fig. 1, 2, 3, 4, and 5, on the basis of the above embodiment, the valve body 100 is provided with an oil inlet 150, an oil outlet 160, an oil return 170, and a connection hole 180, the oil inlet 150 is communicated with the oil inlet chamber 210, the oil outlet 160 is communicated with the oil outlet chamber 230, the oil return 170 is communicated with the oil return chamber 250, one end of the connection hole 180 is communicated with the bottom chamber 270, and the other end is communicated with the oil outlet 160.
Preferably, the front and the rear of the stacked three-way flow valve have a plurality of holes, liquid enters the oil inlet chamber 210 from the oil inlet 150 at a certain pressure, so as to jack up the flow control valve core 300, so that the flow control valve core 300 is in interference connection with the push rod 120, the liquid can enter the oil outlet chamber 230 from the opening formed by the first through hole 310 and the oil outlet chamber 230, and then flows out along the oil outlet 160, while the liquid pushes the pressure compensation valve core 400 downward at the same time, so that the second through hole 410 is communicated with the oil return hole 170, and the redundant liquid flows back into the oil tank from the oil return chamber 250 through the oil return hole 170.
Moreover, since the connection hole 180 is communicated with the bottom chamber 270 and the oil outlet 160, the pressure of the bottom chamber 270 is the pressure of the oil inlet chamber 210 minus the elastic force of the spring 600, that is, the pressure of the bottom chamber 270 is the pressure of the oil outlet chamber 230, so that the influence of load variation can be automatically compensated, the differential pressure before and after throttling is a constant value, and the influence of load variation on the flow is eliminated.
As shown in fig. 1 and 2, on the basis of the above embodiment, the valve body 100 is provided with a valve seat 110, a knob 130, a push rod 120 and an adjusting screw 140, the valve seat 110 is provided with a threaded hole 111, the threaded hole 111 is communicated with the valve hole 200, the adjusting screw 140 is connected with the threaded hole 111, the push rod 120 is fixedly connected with the adjusting screw 140, the push rod 120 penetrates into the valve hole 200 and is connected with the flow rate adjusting valve core 300 in an abutting manner, and the knob 130 is connected with the adjusting screw 140 and is used for driving the adjusting screw 140 to rotate.
Preferably, the valve seat 110 is connected to the knob 130, and the knob 130 is also connected to the flow control valve core 300 in a linkage manner, that is, the knob 130 can limit the maximum lifting position of the flow control valve core 300 after being rotated, and when the knob 130 is screwed, the flow control valve core 300 moves, but the push rod 120 is essentially used for pushing against the flow control valve core 300, so as to limit the stroke.
Preferably, the flow rate adjustment valve core 300 can move in the axial direction, and the corresponding area of the first through hole 310 and the oil outlet chamber 230 can be adjusted by the knob 130, since the liquid in the oil inlet chamber 210 can push the flow rate adjustment valve core 300 to the oil outlet chamber 230, the push rod 120 is required to push the flow rate adjustment valve core 300, that is, the maximum communication area of the first through hole 310 and the oil outlet chamber 230 is set.
Preferably, the threaded hole 111 on the valve seat 110 is communicated with the valve hole 200, the push rod 120 is located in the threaded hole 111 and the valve hole 200, and the end of the push rod 120 is fixedly connected with the adjusting screw 140, when the knob 130 is screwed, the adjusting screw 140 rotates through the threaded hole 111 and moves axially, so as to drive the push rod 120 to move axially, when the knob 130 rotates, so as to drive the push rod 120 to move upwards, the opening formed between the first through hole 310 and the oil outlet cavity 230 becomes larger, so as to improve the flow rate, and conversely, when the push rod 120 moves downwards, the opening formed between the first through hole 310 and the oil outlet cavity 230 becomes smaller.
As shown in fig. 1 and 2, sealing rings 700 are disposed between the valve seat 110 and the valve body 100, between the knob 130 and the valve seat 110, and between the valve seat 110 and the ejector rod 120, and the sealing rings 700 can seal gaps, so that the sealing performance of the speed regulating valve is better.
As shown in fig. 1 and 2, in addition to the above embodiment, a plug screw 500 is provided in the bottom chamber 270, a spring 600 is provided on the plug screw 500, and the spring 600 is connected to the pressure compensating valve core 400 in an abutting manner.
Preferably, the valve hole 200 is actually a through hole, and has a thread at a portion of the bottom chamber 270, the plug screw 500 is fixed at the bottom of the valve hole 200, such that the bottom chamber 270 has a bottom, and one end of the spring 600 is disposed on the plug screw 500 and the other end is disposed on the pressure compensating spool 400, the pressure compensating spool 400 can be blocked on the second passage 240 by the spring 600, when the inlet pressure is excessively high, the spring 600 is compressed, such that the liquid can enter the oil return chamber 250 and then flow back to the oil tank, and as the pressure increases or decreases, the compression amount of the spring 600 is also different, thereby controlling the opening size between the second through hole 410 and the second passage 240.
As shown in fig. 1 and 2, in addition to the above embodiments, the flow rate adjustment valve core 300 has a tubular structure and includes a first tube 320 and a second tube 330, the first tube 320 is connected to the second tube 330, a first partition 340 is disposed between the first tube 320 and the second tube 330, the push rod 120 is inserted into the first tube 320 and is in contact connection with the first partition 340, the second tube 330 is located in the first channel 220, and the first through hole 310 is disposed on a wall surface of the second tube 330.
Preferably, the flow rate adjustment valve is a tubular structure, a first partition part 340 having a partition plate shape is disposed in the tubular structure, so as to divide the flow rate adjustment valve into a first tube 320 and a second tube 330, the liquid can enter the second tube 330 and then enter the oil outlet chamber 230 from the first through hole 310, the first through hole 310 is located at the position of the first passage 220, when the flow rate adjustment valve core 300 moves upward, the first through hole 310 is gradually exposed from the first passage 220 and located in the oil outlet chamber 230, so as to increase the opening area, and when the flow rate adjustment valve core 300 moves downward, the opening area is decreased.
As shown in fig. 1 and 2, in addition to the above embodiments, the pressure compensating valve cartridge 400 has a tubular structure and includes a third tube 420 and a fourth tube 430, the third tube 420 is connected to the fourth tube 430 with a second partition 440 formed therebetween, the third tube 420 is located in the second channel 240, the second through hole 410 is disposed on a wall surface of the third tube 420, and the fourth tube 430 is sealed in the third channel 260 and is communicated with the bottom cavity 270.
Preferably, the shape and structure of the pressure compensating valve spool 400 are the same as those of the flow rate adjusting valve spool 300, wherein the fourth tube 430 is used for blocking the third passage 260, the liquid in the bottom chamber 270 enters the fourth tube 430, so that an upward thrust is applied to the pressure compensating valve spool 400, the liquid enters the third tube 420 from the oil inlet chamber 210, and the pressure compensating valve spool 400 is pushed downward, so that the second through hole 410 is communicated with the oil return chamber 250, the pressure difference between the oil inlet hole 150 and the oil outlet hole 160 is a fixed value, and the influence of load change on the flow rate is eliminated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. The utility model provides a stack formula three-way flow valve which characterized in that includes:
the valve comprises a valve body, a valve seat and a valve body, wherein the valve body is provided with a valve hole, the valve hole comprises an oil outlet cavity, a first channel, an oil inlet cavity, a second channel, an oil return cavity, a third channel and a bottom cavity which are sequentially connected, the valve body is provided with an oil inlet hole, an oil outlet hole, an oil return hole and a connecting hole, the oil inlet hole is communicated with the oil inlet cavity, the oil outlet hole is communicated with the oil outlet cavity, the oil return hole is communicated with the oil return cavity, one end of the connecting hole is communicated with the bottom cavity, and the other end of the connecting hole is communicated with the oil outlet hole;
a flow regulating valve core provided with a first through hole, the flow regulating valve core being disposed in the oil inlet chamber and the oil outlet chamber and the first through hole being located in the first passage;
the pressure compensation valve core is provided with a second through hole, the pressure compensation valve core is arranged in the oil inlet cavity, the oil return cavity and the bottom cavity and seals the third channel, and the second through hole is positioned in the second channel;
the valve body is provided with a valve seat and a knob, the valve seat is connected with the valve body, the knob is rotatably connected on the valve seat, and the knob is in linkage connection with the flow regulating valve core;
the valve body is also provided with an ejector rod and an adjusting screw rod, the valve seat is provided with a threaded hole, the threaded hole is communicated with the valve hole, the adjusting screw rod is connected with the threaded hole, the ejector rod is fixedly connected with the adjusting screw rod, the ejector rod penetrates into the valve hole to be in abutting connection with the flow regulating valve core, and the knob is connected with the adjusting screw rod and used for driving the adjusting screw rod to rotate;
and a screw plug is arranged in the bottom cavity, a spring is arranged on the screw plug, and the spring is in abutting connection with the pressure compensation valve core.
2. A stacked three-way flow valve as defined in claim 1 wherein: and sealing rings are arranged between the valve seat and the valve body, between the knob and the valve seat and between the valve seat and the ejector rod.
3. A stacked three-way flow valve as claimed in claim 1, wherein: the flow regulating valve core is of a tubular structure and comprises a first pipe body and a second pipe body, wherein the first pipe body is connected with the second pipe body, and a first isolation part is arranged between the first pipe body and the second pipe body.
4. A stacked three-way flow valve according to claim 3 wherein: the ejector rod penetrates through the first pipe body and is in abutting connection with the first isolation portion, the second pipe body is located in the first channel, and the first through hole is formed in the wall face of the second pipe body.
5. A stacked three-way flow valve as defined in claim 4 in which: the pressure compensation valve core is of a tubular structure and comprises a third pipe body and a fourth pipe body, wherein the third pipe body is connected with the fourth pipe body, and a second isolation part is formed between the third pipe body and the fourth pipe body.
6. A stacked three-way flow valve as defined in claim 5 wherein: the third pipe body is located in the second channel, the second through hole is formed in the wall surface of the third pipe body, and the fourth pipe body is sealed in the third channel and communicated with the bottom cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449270.6A CN111692149B (en) | 2020-05-25 | 2020-05-25 | Stacked three-way flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449270.6A CN111692149B (en) | 2020-05-25 | 2020-05-25 | Stacked three-way flow valve |
Publications (2)
| Publication Number | Publication Date |
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| CN111692149A CN111692149A (en) | 2020-09-22 |
| CN111692149B true CN111692149B (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010449270.6A Active CN111692149B (en) | 2020-05-25 | 2020-05-25 | Stacked three-way flow valve |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173718A (en) * | 2006-10-30 | 2008-05-07 | 黄金伦 | Three-way valve |
| CN103047447A (en) * | 2012-12-28 | 2013-04-17 | 大连理工大学 | Valve body assembly of high-pressure large-flow fast-response two-position three-way valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659498A (en) * | 1970-08-13 | 1972-05-02 | Pacific Press & Shear Corp | Ram attitude control system and valve assembly therefor |
| US3901264A (en) * | 1972-03-06 | 1975-08-26 | Gresen Manufacturing Co | Adjustable flow control for hydraulic valves having high pressure main supply and controls fluid flow to cylinder and exhaust ports |
| CN2784699Y (en) * | 2005-03-24 | 2006-05-31 | 黄克敏 | Pressure stable throttle valve |
| CN101625043B (en) * | 2009-08-13 | 2011-12-21 | 凯迈（洛阳）气源有限公司 | high-pressure reducing valve |
| CN201818573U (en) * | 2010-07-22 | 2011-05-04 | 泸州众大科技液压件有限公司 | Integrated valve for small-sized rig |
| CN102400970B (en) * | 2011-12-01 | 2014-11-26 | 宁波华液机器制造有限公司 | Overflow throttling valve |
| CN105041754A (en) * | 2015-08-24 | 2015-11-11 | 南京埃斯顿自动化股份有限公司 | Throttling overflow valve |
| CN106089833B (en) * | 2016-08-04 | 2018-08-24 | 华侨大学 | A kind of proportional overflow throttle valve |
| CN208203689U (en) * | 2018-05-09 | 2018-12-07 | 河北华春液压汽配有限公司 | Shunt variable voltage control commutation pile-up valve |
-
2020
- 2020-05-25 CN CN202010449270.6A patent/CN111692149B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173718A (en) * | 2006-10-30 | 2008-05-07 | 黄金伦 | Three-way valve |
| CN103047447A (en) * | 2012-12-28 | 2013-04-17 | 大连理工大学 | Valve body assembly of high-pressure large-flow fast-response two-position three-way valve |
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| CN111692149A (en) | 2020-09-22 |
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