CN109667802B - Hybrid control synchronous valve - Google Patents
Hybrid control synchronous valve Download PDFInfo
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- CN109667802B CN109667802B CN201811450182.7A CN201811450182A CN109667802B CN 109667802 B CN109667802 B CN 109667802B CN 201811450182 A CN201811450182 A CN 201811450182A CN 109667802 B CN109667802 B CN 109667802B
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- oil inlet
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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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- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
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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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1823—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for ball check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/285—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only the cutting-off member being a ball
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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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
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
Abstract
A mixing control synchronous valve comprises a valve body, wherein an oil inlet cavity is formed in the lower portion of the valve body, a main valve core is arranged in the oil inlet cavity, an oil inlet is formed below the oil inlet cavity of the valve body, a left oil outlet and a right oil outlet are respectively formed in two side faces of the upper portion of the valve body, the left oil outlet is communicated with the oil inlet cavity through a left channel, the right oil outlet is communicated with the oil inlet cavity through a right channel, a left oil cavity is formed above the left channel of the valve body, and a; the left oil cavity and the right oil cavity are provided with oil outlet valve cores; the left end and the right end of the main valve core are respectively provided with a left piston and a right piston, the right side of the valve body is provided with a driving unit, and the right end of the right piston is provided with a control part; the left end of the oil inlet cavity is a through hole, an oil inlet sealing bolt is arranged on the through hole, and a spring is arranged between the oil inlet sealing bolt and the left piston; the upper ends of the left oil cavity and the right oil cavity are through holes, oil outlet sealing bolts are arranged on the through holes, and springs are arranged between the oil outlet sealing bolts and the oil outlet valve cores. The invention improves the control precision, greatly saves the cost and improves the working efficiency.
Description
Technical Field
The invention relates to the technical field of synchronous valves, in particular to a hybrid control synchronous valve.
Background
The synchronous valve is a hydraulic element which is used for ensuring that two or more than two actuators (hydraulic cylinders or hydraulic motors) can still obtain the same or proportional flow when bearing different loads, so that the actuators move at the same displacement or the same speed, and the synchronous valve is a synchronous lifting mechanism. When the synchronous lifting mechanism is used, one hydraulic valve is basically used for controlling one actuating element, and in the lifting process, the lifting of the support column is asynchronous due to different working resistances, so that the speed is asynchronous, and the movement precision is influenced. The typical structure of the traditional synchronous valve is a hook type and a reversing piston type, and experts and scholars at home and abroad are dedicated to the structure and performance research of the traditional synchronous valve for many years, but the basic structure of the traditional synchronous valve is not changed fundamentally until now. In recent years, the research on the synchronous valve by a plurality of scholars is mostly limited to a theoretical knowledge framework established by scholars in the 80 s, and the main research contents comprise two aspects:
factors influencing the steady-state and dynamic performances of the synchronous valve and improvement on the structure of the synchronous valve;
and (II) application analysis of the synchronous valve, such as a trailer drilling machine and a frame vehicle.
However, the development of modern machining techniques has not allowed the performance of conventional synchronous valves to be significantly improved, since the flow rates of conventional synchronous valves are only approximately equal, with errors in principle that are not infinitely reduced or eliminated by the increase in machining accuracy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hybrid control synchronous valve, so as to solve the problem of low synchronous precision of the synchronous valve, improve the control precision, greatly save the cost and improve the working efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a mixing control synchronous valve comprises a valve body, wherein an oil inlet cavity is formed in the lower portion of the valve body, a main valve core is arranged in the oil inlet cavity, an oil inlet is formed below the oil inlet cavity of the valve body, a left oil outlet and a right oil outlet are respectively formed in two side faces of the upper portion of the valve body, the left oil outlet is communicated with the oil inlet cavity through a left channel, the right oil outlet is communicated with the oil inlet cavity through a right channel, a left oil cavity is formed in the upper portion of the left channel of the valve body; the left oil cavity and the right oil cavity are provided with oil outlet valve cores; the left end and the right end of the main valve core are respectively provided with a left piston and a right piston, the right side of the valve body is provided with a driving unit, the right end of the right piston is provided with a control part, and the driving unit drives the main valve core to move left and right in the oil inlet cavity through the driving control part, so that the size of an oil outlet opening on the left side and the right side of the main valve core is adjusted; the left end of the oil inlet cavity is a through hole, an oil inlet sealing bolt is arranged on the through hole, and a spring is arranged between the oil inlet sealing bolt and the left piston; the upper ends of the left oil cavity and the right oil cavity are through holes, an oil outlet sealing bolt is arranged on the through holes, a spring is arranged between the oil outlet sealing bolt and an oil outlet valve core, a three-way one-way valve is arranged between the left oil cavity and the right oil cavity of the valve body, a first inlet of the three-way one-way valve is communicated with the left oil cavity, a second inlet of the three-way one-way valve is communicated with the right oil cavity, and an outlet of the three-way one-way valve is communicated with.
Therefore, when the hydraulic oil pressure control valve is used, the main valve core is located in the middle of the oil inlet cavity at the beginning, when oil with certain pressure exists in the oil inlet, the oil flows out from the oil outlet openings on the two sides of the main valve core, the oil outlet valve cores of the left oil cavity and the right oil cavity are pushed open, and the oil flows out from the left oil outlet and the right oil outlet; when the pressure at one side of the left oil outlet and the right oil outlet is high, the sealing steel ball of the three-way one-way valve is pushed to the other side under the action of the pressure, and the oil at the side with the high pressure enters the through holes at the upper ends of the left oil cavity and the right oil cavity through the three-way one-way valve, so that the opening of the oil outlet valve core is reduced, the outflow of the oil is reduced, the pressure of the left oil outlet is kept consistent with that of the right oil outlet, and the movement displacement or the speed of the actuating element respectively driven by the oil pressure of the left oil outlet. Under the condition, when the movement displacement or speed of the executing element is deviated, the signal is fed back to the control system through the displacement or speed sensor of the executing element, the control system sends out a control signal to enable the driving unit to act, the driving unit enables the main valve core to move left and right in the oil inlet cavity through the driving control part, and therefore the size of the oil outlet opening on the left side and the right side of the main valve core is adjusted, the displacement or speed synchronization of the executing element is further guaranteed, and the synchronous work is completed.
As an improvement of the invention, the driving unit comprises a stepping motor, the control part is a rack arranged at the right end of the right piston, and an output shaft of the stepping motor is provided with a gear which is meshed with the rack.
As an improvement of the invention, the middle part of the oil inlet sealing bolt is provided with a threaded through hole, a pre-tightening bolt is arranged in the threaded through hole, and the inner end of the pre-tightening bolt is in contact pressure with the spring.
As an improvement of the invention, an oil inlet sealing gasket is arranged between the oil inlet sealing bolt and the valve body.
As an improvement of the invention, the valve body is provided with a pressure relief hole communicated with the outlet of the three-way one-way valve, and the pressure relief hole is provided with a pressure relief sealing bolt.
Compared with the prior art, the technical scheme of the invention has the following innovation points and beneficial effects:
according to the invention, the three-way one-way valve is arranged, so that the pressures of the left oil outlet and the right oil outlet are kept consistent, and the movement displacement or speed of the actuating elements respectively driven by the oil pressure of the left oil outlet and the oil pressure of the right oil outlet is kept consistent;
meanwhile, the driving unit drives the main valve core to move left and right in the oil inlet cavity through the driving control part, so that the size of an oil outlet opening on the left side and the right side of the main valve core is adjusted, and the displacement or the speed synchronization of the executing elements is further ensured;
the invention not only improves the synchronous precision of the synchronous valve, but also improves the control precision, greatly saves the cost and improves the working efficiency.
Drawings
FIG. 1 is a schematic diagram of a hybrid control synchronizing valve of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Examples
Referring to fig. 1, a hybrid control synchronous valve includes a valve body 10, an oil inlet chamber 11 is provided at a lower portion of the valve body 10, a main valve core 20 is provided in the oil inlet chamber 11, an oil inlet 12 is provided below the oil inlet chamber 11 of the valve body 10, a left oil outlet 13 and a right oil outlet 14 are respectively provided at two side faces of an upper portion of the valve body 10, the left oil outlet 13 is communicated with the oil inlet chamber 11 through a left channel 15, the right oil outlet 14 is communicated with the oil inlet chamber 11 through a right channel 16, a left oil chamber 17 is provided above the left channel 15 of the valve body 10, and a right oil chamber;
the left oil chamber 17 and the right oil chamber 18 are provided with an oil outlet valve core 40; a left piston 22 and a right piston 21 are respectively arranged at the left end and the right end of the main valve element 20, a driving unit 70 is arranged at the right side of the valve body 10, a control part 23 is arranged at the right end of the right piston 21, and the driving unit 70 drives the control part 23 to enable the main valve element 20 to move left and right in the oil inlet cavity 11, so that the size of an oil outlet opening at the left side and the right side of the main valve element 20 is adjusted;
the left end of the oil inlet cavity 11 is a through hole, an oil inlet sealing bolt 60 is arranged on the through hole, and a spring 61 is arranged between the oil inlet sealing bolt 60 and the left piston 22;
the upper ends of the left oil chamber 17 and the right oil chamber 18 are through holes, an oil outlet sealing bolt 42 is arranged on the through holes, a spring 41 is arranged between the oil outlet sealing bolt 42 and the oil outlet valve core 40, a three-way check valve 50 is arranged between the left oil chamber 17 and the right oil chamber 18 of the valve body 10, a first inlet 51 of the three-way check valve 50 is communicated with the left oil chamber 17, a second inlet 52 of the three-way check valve is communicated with the right oil chamber 18, and an outlet 53 of the three-way check valve is respectively communicated with the through holes at the upper ends of the.
Therefore, when the hydraulic oil pressure control valve is used, the main valve core is located in the middle of the oil inlet cavity at the beginning, when oil with certain pressure exists in the oil inlet, the oil flows out from the oil outlet openings on the two sides of the main valve core, the oil outlet valve cores of the left oil cavity and the right oil cavity are pushed open, and the oil flows out from the left oil outlet and the right oil outlet; when the pressure at one side of the left oil outlet and the right oil outlet is high, the sealing steel ball of the three-way one-way valve is pushed to the other side under the action of the pressure, and the oil at the side with the high pressure enters the through holes at the upper ends of the left oil cavity and the right oil cavity through the three-way one-way valve, so that the opening of the oil outlet valve core is reduced, the outflow of the oil is reduced, the pressure of the left oil outlet is kept consistent with that of the right oil outlet, and the movement displacement or the speed of the actuating element respectively driven by the oil pressure of the left oil outlet. Under the condition, when the movement displacement or speed of the executing element is deviated, the signal is fed back to the control system through the displacement or speed sensor of the executing element, the control system sends out a control signal to enable the driving unit to act, the driving unit enables the main valve core to move left and right in the oil inlet cavity through the driving control part, and therefore the size of the oil outlet opening on the left side and the right side of the main valve core is adjusted, the displacement or speed synchronization of the executing element is further guaranteed, and the synchronous work is completed.
In this embodiment, the driving unit 70 includes a stepping motor, the control unit 23 is a rack disposed at the right end of the right piston, and an output shaft of the stepping motor is provided with a gear 71, and the gear is engaged with the rack 71. The gear is driven by the stepping motor to drive the rack and the main valve core to move left and right in the oil inlet cavity, so that the size of an oil outlet opening on the left side and the right side of the main valve core is adjusted, the displacement or the speed synchronization of the executing elements is further ensured, and the synchronous work is completed. Of course, the stepping motor may be an air cylinder, and the control portion may be a rotating shaft, which also falls within the above protection scope of the present invention.
In this embodiment, a threaded through hole is formed in the middle of the oil inlet sealing bolt 60, a pre-tightening bolt 62 is arranged in the threaded through hole, and the inner end of the pre-tightening bolt 62 is in contact with the spring 61. The oil inlet sealing bolt and the pre-tightening bolt are matched for use, so that the sealing function can be achieved, and the tightness degree of the main valve core can be adjusted.
In this embodiment, an oil-feeding sealing washer 63 is disposed between the oil-feeding sealing bolt 60 and the valve body 10. And the oil inlet cavity is further sealed by using an oil inlet sealing gasket.
In this embodiment, the valve body 10 is provided with a pressure relief hole communicated with the outlet 53 of the three-way check valve 50, and the pressure relief hole is provided with a pressure relief sealing bolt 54. And hydraulic oil in the through holes at the upper ends of the left oil cavity and the right oil cavity can be decompressed through the decompression holes.
Compared with the prior art, the technical scheme of the invention has the following innovation points and beneficial effects:
according to the invention, the three-way one-way valve is arranged, so that the pressures of the left oil outlet and the right oil outlet are kept consistent, and the movement displacement or speed of the actuating elements respectively driven by the oil pressure of the left oil outlet and the oil pressure of the right oil outlet is kept consistent;
meanwhile, the driving unit drives the main valve core to move left and right in the oil inlet cavity through the driving control part, so that the size of an oil outlet opening on the left side and the right side of the main valve core is adjusted, and the displacement or the speed synchronization of the executing elements is further ensured;
the invention not only improves the synchronous precision of the synchronous valve, but also improves the control precision, greatly saves the cost and improves the working efficiency.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. The utility model provides a hybrid control synchronous valve, includes the valve body, and the valve body lower part is equipped with the oil feed chamber, is equipped with main valve core, its characterized in that in the oil feed chamber: an oil inlet is formed below the oil inlet cavity of the valve body, a left oil outlet and a right oil outlet are respectively formed in two side faces of the upper portion of the valve body, the left oil outlet is communicated with the oil inlet cavity through a left channel, the right oil outlet is communicated with the oil inlet cavity through a right channel, a left oil cavity is formed above the left channel of the valve body, and a right oil cavity is formed above the right channel of the valve body; the left oil cavity and the right oil cavity are provided with oil outlet valve cores; the left end and the right end of the main valve core are respectively provided with a left piston and a right piston, the right side of the valve body is provided with a driving unit, the right end of the right piston is provided with a control part, and the driving unit drives the main valve core to move left and right in the oil inlet cavity through the driving control part, so that the size of an oil outlet opening on the left side and the right side of the main valve core is adjusted; the left end of the oil inlet cavity is a through hole, an oil inlet sealing bolt is arranged on the through hole, and a spring is arranged between the oil inlet sealing bolt and the left piston; the upper ends of the left oil cavity and the right oil cavity are through holes, an oil outlet sealing bolt is arranged on the through holes, a spring is arranged between the oil outlet sealing bolt and an oil outlet valve core, a three-way one-way valve is arranged between the left oil cavity and the right oil cavity of the valve body, a first inlet of the three-way one-way valve is communicated with the left oil cavity, a second inlet of the three-way one-way valve is communicated with the right oil cavity, and an outlet of the three-way one-way valve is communicated with.
2. The mixing control synchronizing valve according to claim 1, characterized in that: the driving unit comprises a stepping motor, the control part is a rack arranged at the right end of the right piston, and an output shaft of the stepping motor is provided with a gear which is meshed with the rack.
3. The mixing control synchronizing valve according to claim 1, characterized in that: the middle part of the oil inlet sealing bolt is provided with a threaded through hole, a pre-tightening bolt is arranged in the threaded through hole, and the inner end of the pre-tightening bolt is in contact pressure with the spring.
4. The mixing control synchronizing valve according to claim 1, characterized in that: and an oil inlet sealing washer is arranged between the oil inlet sealing bolt and the valve body.
5. The mixing control synchronizing valve according to claim 1, characterized in that: and the valve body is provided with a pressure relief hole communicated with an outlet of the three-way one-way valve, and the pressure relief hole is provided with a pressure relief sealing bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811450182.7A CN109667802B (en) | 2018-11-30 | 2018-11-30 | Hybrid control synchronous valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811450182.7A CN109667802B (en) | 2018-11-30 | 2018-11-30 | Hybrid control synchronous valve |
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| Publication Number | Publication Date |
|---|---|
| CN109667802A CN109667802A (en) | 2019-04-23 |
| CN109667802B true CN109667802B (en) | 2020-06-19 |
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| CN201811450182.7A Active CN109667802B (en) | 2018-11-30 | 2018-11-30 | Hybrid control synchronous valve |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469660B (en) * | 2018-11-30 | 2020-03-06 | 广东轻工职业技术学院 | Double-valve-core control synchronous valve |
| CN111255917B (en) * | 2020-02-04 | 2022-01-14 | 内蒙古西部天然气管道运行有限责任公司 | Natural gas compressor control device |
| CN111536282B (en) * | 2020-05-12 | 2021-09-14 | 浙江吉智新能源汽车科技有限公司 | Flow switching valve for heat pump system, valve assembly and heat pump system |
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| US20020000157A1 (en) * | 1999-10-29 | 2002-01-03 | Paul R. Spratt | Manually-operated synchronizing valve for paired hydraulic cylinders |
| CN102797719A (en) * | 2011-05-26 | 2012-11-28 | 邵阳维克液压股份有限公司 | Synchronous valve block of surface discharge outlet gate hydraulic hoist |
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| JPH0828729A (en) * | 1994-07-19 | 1996-02-02 | Toto Ltd | Hot water and water mixing cock |
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| CN108571488A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | Pulsed hydraulic pressure divides synchronous valve |
| CN107013521A (en) * | 2017-04-11 | 2017-08-04 | 鑫矿液压科技有限公司 | A kind of synchronous valve |
| CN107559260A (en) * | 2017-08-25 | 2018-01-09 | 广东德奥电梯科技有限公司 | Hydraulic Synchronizing Valve |
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| CN109667802A (en) | 2019-04-23 |
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