CN108843646B - Flow valve - Google Patents
Flow valve Download PDFInfo
- Publication number
- CN108843646B CN108843646B CN201810832548.0A CN201810832548A CN108843646B CN 108843646 B CN108843646 B CN 108843646B CN 201810832548 A CN201810832548 A CN 201810832548A CN 108843646 B CN108843646 B CN 108843646B
- Authority
- CN
- China
- Prior art keywords
- spring seat
- valve core
- sleeve
- hole
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a flow valve, comprising: the valve comprises a valve sleeve, a compensation valve core, a first spring seat, a second spring seat, a check ring, a first spring, a throttle valve sleeve, a flux sleeve, an armature, a second spring, a throttle valve core and a coil. The flow valve provided by the embodiment of the invention has the advantages of simple structure and low cost, and can realize the function of bidirectional pressure compensation.
Description
Technical Field
The invention relates to the field of valves, in particular to a flow valve.
Background
In a workbench system requiring stable lifting in circuits such as mobile equipment, medical instruments and industrial vehicles, a bidirectional double-speed pressure compensation function is often required to be realized. At present, an embedded structure is often adopted, two pressure compensation flow valves are combined to form the pressure compensation valve, bidirectional pressure compensation is achieved, further, in order to achieve double-speed electric control, a bidirectional electromagnetic valve is required to be additionally arranged on the basis to control, and a functional valve block is formed.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide a flow valve which has simple structure and low cost and can realize the function of bidirectional pressure compensation.
The flow valve according to an embodiment of the invention comprises:
the valve sleeve is provided with a valve sleeve blind hole with an upward opening, the side wall of the valve sleeve is provided with a first oil port and a second oil port positioned above the first oil port, and the first oil port and the second oil port are both communicated with the valve sleeve blind hole;
the compensating valve core is arranged in the valve sleeve blind hole in a manner of moving up and down, the compensating valve core is provided with a compensating valve core blind hole with an upward opening, the bottom of the compensating valve core is provided with a compensating valve core through hole communicated with the compensating valve core blind hole, and the aperture of the compensating valve core through hole is smaller than that of the compensating valve core blind hole;
the upper end of the first spring seat is provided with a first spring seat outward-flanging, the first spring seat outward-flanging is matched with the compensating valve core blind hole, the lower end of the first spring seat downwards penetrates through the compensating valve core through hole, the first spring seat is provided with a first spring seat through hole vertically penetrating through the first spring seat, and the side wall of the first spring seat is provided with a first spring seat through hole communicated with the first spring seat through hole;
the second spring seat is arranged in the compensating valve core blind hole and is positioned above the first spring seat, and a second spring seat through hole which penetrates through the second spring seat up and down is formed in the second spring seat;
the check ring is fixedly arranged in the compensation valve core blind hole and is positioned above the second spring seat, and the check ring limits the second spring seat above the second spring seat;
a first spring disposed within the compensator spool blind bore, a lower end of the first spring abutting the first spring seat and an upper end of the first spring abutting the second spring seat, the first spring pushes the first spring seat downwards so that a first spring seat outward flanging of the first spring seat is lapped at the bottom of the compensating valve core blind hole and the lower end of the first spring seat is abutted against the bottom of the valve sleeve blind hole, the first spring urges the second spring seat upward so that an upper end face of the second spring seat abuts against the retainer ring, thereby enabling the lower end surface of the compensation valve core to avoid opening the first oil port and enabling the upper end surface of the compensation valve core to avoid opening the second oil port, a first pressure cavity is defined between the lower end surface of the compensating valve core and the outer peripheral surface of the first spring seat in the valve sleeve blind hole;
the upper end of the throttle valve sleeve is provided with a throttle valve sleeve outward flange, the throttle valve sleeve outward flange is lapped on the inner wall of the valve sleeve blind hole, the lower end of the throttle valve sleeve extends downwards into the compensation valve core blind hole and abuts against the upper end face of the second spring seat, the throttle valve sleeve is provided with a throttle valve sleeve through hole which penetrates through the throttle valve sleeve up and down, the side wall of the throttle valve sleeve is provided with a throttle hole communicated with the throttle valve sleeve through hole, and a second pressure cavity is defined by the upper end face of the compensation valve core and the outer surface of the throttle valve sleeve in the valve sleeve blind hole;
the magnetic conduction sleeve is detachably matched at the upper end of the valve sleeve blind hole and is matched with the valve sleeve to fix the throttle valve sleeve;
the armature is arranged in the magnetic conduction sleeve in a way of moving up and down,
the upper end of the second spring is connected with the magnetic sleeve, and the lower end of the second spring is connected with the armature;
the upper end of the throttle valve core is connected with the lower end of the armature, the lower end of the throttle valve core extends downwards into the throttle valve sleeve through hole, the throttle valve core is used for selectively opening and closing the throttle hole, and a throttle valve core through hole which is communicated with the throttle valve sleeve through hole and the upper end surface of the throttle valve core is formed in the throttle valve core;
and the coil is arranged on the magnetic conduction sleeve to realize electromagnetic connection with the armature.
Advantageously, when the coil is de-energized, the second spring pushes the armature downward, and the throttle valve core is driven downward by the armature to close the throttle hole.
Advantageously, when the coil is energized, the armature moves upward against the force of the second spring, which in turn drives the throttle valve cartridge upward by the armature to at least partially open the throttle bore.
Advantageously, the flow valve further comprises a positioning sleeve, the positioning sleeve is arranged at the bottom of the blind hole of the valve sleeve, and the lower end of the first spring seat is matched in the positioning sleeve in a vertically movable mode.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a flow valve according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The flow valve according to an embodiment of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a flow valve according to an embodiment of the invention includes: the valve comprises a valve sleeve 3, a compensation valve core 5, a first spring seat 2, a second spring seat 6, a check ring 61, a first spring 4, a throttle valve sleeve 7, a magnetic conductive sleeve 9, an armature 10, a second spring 11, a throttle valve core 8 and a coil 12.
Specifically, the valve sleeve 3 is provided with a valve sleeve blind hole with an upward opening, the side wall of the valve sleeve 3 is provided with a first oil port a and a second oil port B positioned above the first oil port a, and the first oil port a and the second oil port B are both communicated with the valve sleeve blind hole.
The compensating valve core 5 is arranged in the valve sleeve blind hole in a vertically movable manner, the compensating valve core 5 is provided with a compensating valve core blind hole with an upward opening, the bottom of the compensating valve core 5 is provided with a compensating valve core through hole communicated with the compensating valve core blind hole, and the aperture of the compensating valve core through hole is smaller than that of the compensating valve core blind hole.
The upper end of the first spring seat 2 is provided with a first spring seat flanging, the first spring seat flanging is matched with the lower end of the compensating valve core blind hole and the first spring seat 2 and penetrates through the compensating valve core through hole downwards, the first spring seat 2 is provided with a first spring seat through hole 22 which penetrates through the first spring seat 2 from top to bottom, and the side wall of the first spring seat 2 is provided with a first spring seat through hole 21 which is communicated with the first spring seat through hole 22.
The second spring seat 6 is arranged in the compensation valve core blind hole and positioned above the first spring seat 2, and a second spring seat through hole 601 which vertically penetrates through the second spring seat 6 is formed in the second spring seat 6.
The check ring 61 is fixedly arranged in the compensation valve core blind hole and positioned on the second spring seat 6, and the check ring 61 limits the second spring seat 6 on the second spring seat 6.
The upper end of the throttle valve sleeve 7 is provided with a throttle valve sleeve flanging, the throttle valve sleeve flanging is lapped on the inner wall of the valve sleeve blind hole, the lower end of the throttle valve sleeve 7 extends downwards into the compensation valve core blind hole and abuts against the upper end face of the second spring seat 6, a throttle valve sleeve through hole 7b which penetrates through the throttle valve sleeve 7 from top to bottom is formed in the throttle valve sleeve 7, and a throttle hole 7a communicated with the throttle valve sleeve through hole 7b is formed in the side wall of the throttle valve sleeve 7. In the blind bore, the upper end face of the compensator spool 5 and the outer surface of the throttle sleeve 7 delimit a second pressure chamber 3 a.
The magnetic sleeve 9 is detachably matched at the upper end of the valve sleeve blind hole, and the magnetic sleeve 9 is matched with the valve sleeve 3 to fix the throttle valve sleeve 7. For example, the magnetic conduction sleeve 9 is in threaded connection with the upper end of the blind hole of the valve sleeve.
The armature 10 is arranged in the flux sleeve 9 so as to be movable up and down.
The upper end of the second spring 11 is connected with the magnetic sleeve 9, and the lower end of the second spring 11 is connected with the armature 10.
The upper end of the throttle valve core 8 is connected with the lower end of the armature 10, the lower end of the throttle valve core 8 extends downwards into the throttle valve sleeve through hole 7b, the throttle valve core 8 is used for selectively opening and closing the throttle hole 7a, and the throttle valve core 8 is provided with a throttle valve core through hole 81 which is communicated with the throttle valve sleeve through hole 7b and the upper end surface of the throttle valve core 8.
The coil 12 is arranged on the flux sleeve 9 to be electromagnetically connected with the armature 10.
Advantageously, when the coil 12 is de-energized, the second spring 11 pushes the armature 10 downward, which in turn drives the throttle valve spool 8 downward by the armature 10 to close the throttle hole 7 a.
Advantageously, when the coil 12 is energized, the armature 10 moves upward against the force of the second spring 11, and the throttle valve member 8 is carried upward by the armature 10 to at least partially open the throttle bore 7 a. It will be appreciated that the throttle valve cartridge 8 may be caused to at least partially open the throttle orifice 7a by varying the magnitude of the voltage applied to the coil 12.
According to a specific example of the invention, the flow valve further comprises a positioning sleeve 1, the positioning sleeve 1 is arranged at the bottom of the blind hole of the valve sleeve, and the lower end of a first spring seat 2 is matched in the positioning sleeve 1 in a vertically movable mode. Thereby, a locus of the up and down movement of the first spring seat 2 can be defined.
The working principle of the flow valve according to the embodiment of the invention is as follows:
the magnetic conduction sleeve 9, the armature 10, the second spring 11, the coil 12, the throttle valve core 8 and the throttle valve sleeve 7 form a proportional throttle valve component. The function performed by this assembly is to vary the amount of upward attraction to the armature 10 by varying the magnitude of the voltage applied to a given coil 12, which acts on the second spring 11 and, in turn, varies the upward displacement of the armature 10. Since the throttle valve slide 8 and the armature 10 are fixedly connected, the upward displacement of the throttle valve slide 8 can be changed.
When the coil 12 is de-energized, the throttle hole 7a is completely sealed by the throttle valve 8, and the first port a is not communicated with the second port B. The larger the voltage of the given coil 12, the larger the upward displacement of the throttle valve spool 8, and thus the larger the area of the throttle hole 7a in the throttle valve sleeve 7 is exposed. The throttle valve core 8 is provided with a throttle valve core through-flow hole 81 to communicate the upper cavity and the lower cavity of the throttle valve core 8, so that the effect of balancing the acting force of the oil on the throttle valve core 8 is achieved, and the throttle valve core 8 is only under the acting force of the armature 10 and the second spring 11.
The compensation valve core 5 is used for being matched with the first oil port A and the second oil port B, the opening degree of the first oil port A or the second oil port B is changed according to the pressure difference between the second pressure cavity 3a and the first pressure cavity 3B, the pressure of the second pressure cavity 3a or the first pressure cavity 3B is further changed, and then the front and back pressure difference of the throttling hole 7a is kept constant.
In the first working condition, when oil enters from the first oil port a, the opening degree of the throttle hole 7a is changed by changing the voltage on the coil 12, and the oil flows from the first oil port a to the second oil port B through the first spring seat through hole 21, the first spring seat through hole 22, the throttle sleeve through hole 7B and the throttle hole 7 a. When the load of the second oil port B is reduced, the pressure difference between the first oil port A and the second oil port B is increased, the resultant force acting on the compensating valve core 5 is increased, the compensating valve core 5 is pushed to drive the first spring seat 2 to overcome the acting force of the first spring 4 to move upwards to reduce the opening degree of the second oil port B, so that the pressure of the second pressure cavity 3a is increased until the stress of the compensating valve core 5 reaches a balanced state; if the load of the second oil port B is increased, the pressure difference between the first oil port a and the second oil port B is reduced, the resultant force acting on the compensation valve core 5 is reduced, and the compensation valve core 5 moves downwards under the action of the first spring 4 and the pressure difference to increase the opening degree of the second oil port B, so that the pressure of the second pressure cavity 3a is reduced until the stress of the compensation valve core 5 reaches a balanced state. Therefore, the pressure difference between the front and the rear of the throttle hole 7a can be kept constant under the action of the compensating valve core 5, and under the condition of load change, if the opening degree of the throttle hole 7a is kept constant, the flow output by the second oil port B is kept constant.
In the second working condition, when oil enters from the second oil port B, the opening degree of the throttle hole 7a is changed by changing the voltage on the coil 12, and the oil flows from the second oil port B to the first oil port a through the throttle hole 7a, the throttle sleeve through hole 7B, the first spring seat through hole 22 and the first spring seat through hole 21. When the load of the first oil port A is reduced, the pressure difference between the second oil port B and the first oil port A is increased, the resultant force acting on the compensation valve core 5 is increased, the compensation valve core 5 is pushed to drive the second spring seat 6 to downwards move to overcome the acting force of the first spring 4 through the retaining ring 61 so as to reduce the opening degree of the first oil port A, and the pressure of the first pressure cavity 3B is increased until the stress of the compensation valve core 5 reaches a balanced state; if the load of the second oil port B is increased, the pressure difference between the second oil port B and the first oil port a is reduced, the resultant force acting on the compensation valve core 5 is reduced, and the compensation valve core 5 moves upward under the action of the first spring 4 and the pressure difference to increase the opening degree of the first oil port a, so that the pressure of the first pressure cavity 3B is reduced until the stress of the compensation valve core 5 reaches a balanced state. Therefore, the pressure difference between the front and the rear of the throttle hole 7a can be kept constant under the action of the compensating valve core 5, and under the condition of load change, if the opening degree of the throttle hole 7a is kept constant, the flow output by the first oil port A is kept constant.
The flow valve has the advantages that:
(1) the invention can be designed in a plug-in mode, and has the advantages of compact volume, reasonable structure and low cost.
(2) The invention has bidirectional pressure compensation function, can bidirectionally control the output flow of the first oil port A or the second oil port B by controlling the voltage, and has constant flow without being influenced by the change of outlet load.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the embodiments without departing from the scope of the present invention.
Claims (4)
1. A flow valve, comprising:
the valve sleeve is provided with a valve sleeve blind hole with an upward opening, the side wall of the valve sleeve is provided with a first oil port and a second oil port positioned above the first oil port, and the first oil port and the second oil port are both communicated with the valve sleeve blind hole;
the compensating valve core is arranged in the valve sleeve blind hole in a manner of moving up and down, the compensating valve core is provided with a compensating valve core blind hole with an upward opening, the bottom of the compensating valve core is provided with a compensating valve core through hole communicated with the compensating valve core blind hole, and the aperture of the compensating valve core through hole is smaller than that of the compensating valve core blind hole;
the upper end of the first spring seat is provided with a first spring seat outward-flanging, the first spring seat outward-flanging is matched with the compensating valve core blind hole, the lower end of the first spring seat downwards penetrates through the compensating valve core through hole, the first spring seat is provided with a first spring seat through hole vertically penetrating through the first spring seat, and the side wall of the first spring seat is provided with a first spring seat through hole communicated with the first spring seat through hole;
the second spring seat is arranged in the compensating valve core blind hole and is positioned above the first spring seat, and a second spring seat through hole which penetrates through the second spring seat up and down is formed in the second spring seat;
the check ring is fixedly arranged in the compensation valve core blind hole and is positioned above the second spring seat, and the check ring limits the second spring seat above the second spring seat;
a first spring disposed within the compensator spool blind bore, a lower end of the first spring abutting the first spring seat and an upper end of the first spring abutting the second spring seat, the first spring pushes the first spring seat downwards so that a first spring seat outward flanging of the first spring seat is lapped at the bottom of the compensating valve core blind hole and the lower end of the first spring seat is abutted against the bottom of the valve sleeve blind hole, the first spring urges the second spring seat upward so that an upper end face of the second spring seat abuts against the retainer ring, thereby enabling the lower end surface of the compensation valve core to avoid opening the first oil port and enabling the upper end surface of the compensation valve core to avoid opening the second oil port, a first pressure cavity is defined between the lower end surface of the compensating valve core and the outer peripheral surface of the first spring seat in the valve sleeve blind hole;
the upper end of the throttle valve sleeve is provided with a throttle valve sleeve outward flange, the throttle valve sleeve outward flange is lapped on the inner wall of the valve sleeve blind hole, the lower end of the throttle valve sleeve extends downwards into the compensation valve core blind hole and abuts against the upper end face of the second spring seat, the throttle valve sleeve is provided with a throttle valve sleeve through hole which penetrates through the throttle valve sleeve up and down, the side wall of the throttle valve sleeve is provided with a throttle hole communicated with the throttle valve sleeve through hole, and a second pressure cavity is defined by the upper end face of the compensation valve core and the outer surface of the throttle valve sleeve in the valve sleeve blind hole;
the magnetic conduction sleeve is detachably matched at the upper end of the valve sleeve blind hole and is matched with the valve sleeve to fix the throttle valve sleeve;
the armature is arranged in the magnetic conduction sleeve in a way of moving up and down,
the upper end of the second spring is connected with the magnetic sleeve, and the lower end of the second spring is connected with the armature;
the upper end of the throttle valve core is connected with the lower end of the armature, the lower end of the throttle valve core extends downwards into the throttle valve sleeve through hole, the throttle valve core is used for selectively opening and closing the throttle hole, and a throttle valve core through hole which is communicated with the throttle valve sleeve through hole and the upper end surface of the throttle valve core is formed in the throttle valve core;
and the coil is arranged on the magnetic conduction sleeve to realize electromagnetic connection with the armature.
2. The flow valve of claim 1 wherein the second spring pushes the armature downward when the coil is de-energized, thereby pulling the throttle valve spool downward by the armature to close the throttle orifice.
3. The flow valve of claim 1 wherein when the coil is energized, the armature moves upward against the force of the second spring, which in turn drives the throttle valve spool upward to at least partially open the throttle orifice.
4. A flow valve as claimed in any one of claims 1 to 3 further including a locating sleeve mounted at the bottom of the blind bore of the valve housing, the lower end of the first spring seat fitting up and down within the locating sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832548.0A CN108843646B (en) | 2018-07-26 | 2018-07-26 | Flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832548.0A CN108843646B (en) | 2018-07-26 | 2018-07-26 | Flow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843646A CN108843646A (en) | 2018-11-20 |
| CN108843646B true CN108843646B (en) | 2021-08-06 |
Family
ID=64192427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810832548.0A Active CN108843646B (en) | 2018-07-26 | 2018-07-26 | Flow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843646B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102724017B1 (en) * | 2019-04-04 | 2024-10-31 | 이구루코교 가부시기가이샤 | Capacity control valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004175177A (en) * | 2002-11-26 | 2004-06-24 | Nissin Kogyo Co Ltd | Brake liquid pressure maintaining apparatus for vehicle |
| WO2009031007A2 (en) * | 2007-09-04 | 2009-03-12 | Toyota Jidosha Kabushiki Kaisha | A normally closed electromagnetic valve, a brake control system, a control method for a normally closed electromagnetic valve, and an electromagnetic valve |
| CN201103386Y (en) * | 2007-11-30 | 2008-08-20 | 王英 | Helical lifting oil pumping machine |
| CN201494346U (en) * | 2009-06-30 | 2010-06-02 | 覃志明 | Hydraulic lifting operation device of tractor trailer |
| CN104879348A (en) * | 2015-03-27 | 2015-09-02 | 武汉理工大学 | Hydraulic pipeline vibration test simulation experiment platform |
-
2018
- 2018-07-26 CN CN201810832548.0A patent/CN108843646B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843646A (en) | 2018-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5615286B2 (en) | Solenoid valve | |
| JP4820480B2 (en) | Hydraulic valve | |
| JP4620671B2 (en) | valve | |
| US9964965B2 (en) | Method of controlling proportional motion control valve | |
| CN101688628B (en) | Force feedback poppet valve having an integrated pressure compensator | |
| US6966329B2 (en) | Proportional pilot-operated flow control valve | |
| EP3117131B1 (en) | Dual/variable gain oil pump control valve | |
| US8132594B2 (en) | Hydraulic valve actuated by piezoelectric effect | |
| CN102245945A (en) | Pressure control valve | |
| CN102428304B (en) | Proportional throttle valve | |
| US20140026985A1 (en) | Electro-proportional pilot operated poppet valve with pressure compensation | |
| CN102292581A (en) | Open end variable bleed solenoid (vbs) valve with inherent viscous dampening | |
| CN108843646B (en) | Flow valve | |
| JP5513918B2 (en) | Solenoid proportional throttle valve | |
| CN108843642B (en) | Electromagnetic valve for movable arm oil cylinder of excavator | |
| US8905072B2 (en) | Manual override device for a twin spool valve | |
| EP1209327A2 (en) | Hydraulically damped low friction solenoid operated valve | |
| CN111075778B (en) | Transfer controlling means and hydraulic system | |
| US10865891B2 (en) | Device for flow force compensation | |
| EP1239356A1 (en) | Solenoid operated valve with hydraulic dampening | |
| JP4545031B2 (en) | Control valve, variable capacity compressor and refrigeration cycle apparatus | |
| EP0148018A2 (en) | Solenoid controlled fluid flow valve | |
| CN112997028A (en) | Flow path switching valve | |
| US9777865B2 (en) | Balanced electronically controlled pressure regulating valve | |
| CN114412868B (en) | Proportional unloading valve of high-pressure large-flow liquid pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210719 Address after: No. 95 Huicheng Road, Huishan Economic Development Zone, Wuxi City, Jiangsu Province, 214000 Applicant after: Jiangsu Junyuan Equipment Manufacturing Co.,Ltd. Address before: No. 255, 1st floor, building 1, Fengshou street, Chaoan South Road, zumiao street, Chancheng District, Foshan City, Guangdong Province Applicant before: FOSHAN XINZHUO PAISI MACHINERY TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |