CN114294284A - Working valve plate and electro-hydraulic proportional multi-way valve - Google Patents
Working valve plate and electro-hydraulic proportional multi-way valve Download PDFInfo
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- CN114294284A CN114294284A CN202111606287.9A CN202111606287A CN114294284A CN 114294284 A CN114294284 A CN 114294284A CN 202111606287 A CN202111606287 A CN 202111606287A CN 114294284 A CN114294284 A CN 114294284A
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Abstract
The application relates to a work valve block and electric-hydraulic proportional multi-way valve, the work valve block that this application provided includes valve body and valve rod, and the valve body is equipped with first pressure passageway and the second pressure passageway that communicates the valve pocket respectively, and the work valve block still includes solenoid valve subassembly, and solenoid valve subassembly is used for controlling the break-make of first pressure passageway and second pressure passageway. The valve rod is provided with throttling grooves distributed along the length direction, and the main oil inlet channel is communicated with the first oil distribution channel and the second oil distribution channel through the throttling grooves. The application provides a work valve block and electric-hydraulic proportional multi-way valve has solved current work valve block and has adopted artifical manual mode to promote the valve stem and remove, causes the problem that the operating comfort of multi-way valve is lower and the control accuracy of multi-way valve and operating efficiency descend.
Description
Technical Field
The application relates to the technical field of engineering machinery hydraulic elements, in particular to a working valve plate and an electro-hydraulic proportional multi-way valve.
Background
A forklift is indispensable to the development of modern industry as an industrial transportation vehicle. Industrial transportation vehicles are widely used in ports, stations, airports, cargo yards, factory workshops, warehouses, distribution centers and the like, and fork trucks can enter cabins, carriages and containers to load, unload and transport pallet goods, and are indispensable equipment for pallet transportation and container transportation.
In general, a forklift uses a multi-way valve as a power element for controlling forward or backward tilting of a fork rack in front of the forklift. Also, a multiple-way valve typically includes an oil inlet valve plate, an oil return valve plate, and a plurality of service valve plates. The working valve plate comprises a valve body and a valve rod, the valve body is provided with a valve cavity, a main oil inlet channel, a first oil distribution channel and a second oil distribution channel, the main oil inlet channel is communicated with the first oil distribution channel and the second oil distribution channel through the valve cavity, and the valve rod is movably arranged in the valve cavity to control the main oil inlet channel to be communicated with the first oil distribution channel or the second oil distribution channel. When the valve rod is communicated with the main oil inlet channel and the second oil distribution channel, the fork goods shelf in front of the forklift tilts forward, and the fork goods shelf in front of the forklift is in a forward tilting state, so that goods can be forked by the fork goods shelf. When main oil feed passageway of valve rod intercommunication and first minute oil passageway, fork goods shelves hypsokinesis in fork goods shelves hypsokinesis state in fork in fork truck the place ahead is favorable to the goods to remain stable on fork goods shelves, avoids the goods to fall. The existing working valve plate adopts a manual mode to push the valve rod to move, so that the operation comfort of the multi-way valve is low, and the control precision and the operation efficiency of the multi-way valve are low.
Disclosure of Invention
Therefore, the working valve plate and the electro-hydraulic proportional multi-way valve are needed to be provided, and the problems that the existing working valve plate adopts a manual mode to push the valve rod to move, the operation comfort of the multi-way valve is low, and the control precision and the operation efficiency of the multi-way valve are low are solved.
The application provides a work valve piece includes valve body and valve rod, the valve body is equipped with valve pocket, main oil feed passageway, first minute oil passageway and second minute oil passageway, main oil feed passageway passes through the valve pocket intercommunication first minute oil passageway with the second minute oil passageway, valve rod movably locates in the valve pocket, with control main oil feed passageway intercommunication first minute oil passageway or intercommunication the second minute oil passageway. The valve body is also provided with a first pressure passage and a second pressure passage which are respectively communicated with the valve cavity, and when pressure oil is introduced into the first pressure passage, the pressure oil can push the valve rod to move, so that the main oil inlet passage is communicated with the first oil distribution passage; when the second pressure passage is communicated with pressure oil, the pressure oil can push the valve rod to move, so that the main oil inlet passage is communicated with the second oil distribution passage; the working valve plate further comprises a solenoid valve assembly, and the solenoid valve assembly is used for controlling the on-off of the first pressure channel and the second pressure channel. The valve rod is provided with throttling grooves distributed along the length direction, and the main oil inlet channel is communicated with the first oil distribution channel and the second oil distribution channel through the throttling grooves.
In one embodiment, the throttling groove is an undercut groove, or the throttling groove is a conical valve-shaped groove, or the throttling groove is a rectangular groove, or the throttling groove is surrounded by a T-shaped groove, or the throttling groove is an axial triangular groove, or the throttling groove is a multiple circular groove.
In one embodiment, the solenoid valve assembly includes a first solenoid valve and a second solenoid valve, the first solenoid valve is disposed at the first pressure passage, the first solenoid valve is configured to control on/off of the first pressure passage, the second solenoid valve is disposed at the second pressure passage, and the second solenoid valve is configured to control on/off of the second pressure passage. By the arrangement, the on-off of the first pressure channel can be independently controlled by the first electromagnetic valve, the on-off of the second pressure channel can be independently controlled by the second electromagnetic valve, and the control of the electromagnetic valve assembly on the first pressure channel and the second pressure channel is greatly facilitated.
In one embodiment, the first solenoid valve and the second solenoid valve are disposed on the same side of the valve body. It will be appreciated that such an arrangement is advantageous to facilitate assembly of the solenoid operated valve assembly with the valve body.
In one embodiment, the first solenoid valve is detachably connected with the valve body, and the second solenoid valve is detachably connected with the valve body. It will be appreciated that such an arrangement facilitates installation and removal of the solenoid operated valve assembly.
In one embodiment, the first solenoid valve is a proportional pressure reducing solenoid valve; the second electromagnetic valve is a proportional pressure reducing electromagnetic valve.
In one embodiment, the first pressure passage is in communication with the valve chamber at a first end of the valve stem and the second pressure passage is in communication with the valve chamber at a second end of the valve stem. It will be appreciated that this arrangement facilitates better urging of the valve stem to move.
In one embodiment, the first end of the valve stem is provided with a first resilient member for exerting a resilient action on the first end of the valve stem to cause the valve stem to have a tendency to move from the first end towards the second end. It will be appreciated that this arrangement facilitates a more rapid resetting of the valve stem.
In one embodiment, the first elastic member is a compression spring.
The application also provides an electro-hydraulic proportional multi-way valve, which comprises the working valve plate in any one of the embodiments.
Compared with the prior art, the application provides a work valve piece and electric-hydraulic proportional multi-way valve, when solenoid valve subassembly opened first pressure channel, pressure fluid pushed the valve rod through first pressure channel and removed to make main oil feed passageway intercommunication first oil distribution passageway, later, fork goods shelves hypsokinesis in fork truck the place ahead. When the solenoid valve assembly opens the second pressure passage, the pressure oil pushes the valve rod to move through the second pressure passage, so that the main oil inlet passage is communicated with the second oil distribution passage, and then the fork rack in front of the forklift tilts forward. So set up, realized the removal of valve rod through the break-make of control solenoid valve subassembly, improved the operation travelling comfort of electro-hydraulic proportional multi-way valve greatly, and improved the control accuracy and the operating efficiency of electro-hydraulic proportional multi-way valve. Furthermore, the throttling groove can control the oil inlet amount of the first oil distribution channel and the second oil distribution channel, so that the aim of controlling the forward tilting speed and the backward tilting speed of the fork goods shelf is fulfilled. Through set up the throttle groove that distributes along length direction on the valve rod, solenoid valve subassembly is through the distance that the oil feed volume control valve rod of control first pressure passageway removed, and then the oil feed volume that main oil feed passageway got into first minute oil passageway of control, finally realizes the control to fork goods shelves hypsokinesis speed. Similarly, the throttling grooves distributed along the length direction are formed in the valve rod, the electromagnetic valve assembly controls the moving distance of the valve rod by controlling the oil inlet amount of the second pressure channel, so that the oil inlet amount of the main oil inlet channel entering the second oil distribution channel is controlled, and the forward tilting speed of the fork goods shelf is controlled finally.
That is, the work valve block and electric-hydraulic proportional multi-way valve that this application provided have solved current work valve block and have adopted artifical manual mode to promote the valve stem and remove, cause the operating comfort of multi-way valve lower and the control accuracy of multi-way valve and the lower problem of operating efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a service valve plate provided herein;
FIG. 2 is a piping diagram of the working valve plate provided by the present application.
Reference numerals: 100. a valve body; 110. a valve cavity; 120. a main oil inlet channel; 130. a first oil distribution passage; 140. a second oil distribution channel; 150. a first pressure channel; 160. a second pressure channel; 170. a first communicating passage; 180. a second communicating passage; 200. a valve stem; 210. a throttling groove; 300. a solenoid valve assembly; 310. a first solenoid valve; 320. a second solenoid valve; 400. a first high pressure plug; 500. a first elastic member; 600. a one-way valve.
Detailed Description
In the description of the present application, it is to be understood that the terms "center," "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 present application and for simplicity in 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 present application.
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 at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, 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 intervening media. 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.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A forklift is indispensable to the development of modern industry as an industrial transportation vehicle. Industrial transportation vehicles are widely used in ports, stations, airports, cargo yards, factory workshops, warehouses, distribution centers and the like, and fork trucks can enter cabins, carriages and containers to load, unload and transport pallet goods, and are indispensable equipment for pallet transportation and container transportation.
In general, a forklift uses a multi-way valve as a power element for controlling forward or backward tilting of a fork rack in front of the forklift. It should be noted that the multi-way valve can also control the forward tilting speed and the backward tilting speed of the fork goods shelf of the forklift, or control the lifting speed and the descending speed of the forklift, or control the action speed of the forklift attachment. It should be noted that the forklift attachment includes, but is not limited to, a paper roll clamp, a soft bag clamp, a multipurpose flat clamp, a carton clamp, a barrel clamp, a brick clamp, a rotator, a measuring and moving device, and a holding clamp. Also, a multiple-way valve typically includes an oil inlet valve plate, an oil return valve plate, and a plurality of service valve plates. The working valve plate comprises a valve body 100 and a valve rod 200, the valve body 100 is provided with a valve cavity 110, a main oil inlet passage 120, a first oil distribution passage 130 and a second oil distribution passage 140, the main oil inlet passage 120 is communicated with the first oil distribution passage 130 and the second oil distribution passage 140 through the valve cavity 110, and the valve rod 200 is movably arranged in the valve cavity 110 to control the main oil inlet passage 120 to be communicated with the first oil distribution passage 130 or the second oil distribution passage 140. When the valve rod 200 communicates the main oil inlet passage 120 and the second oil distribution passage 140, the fork rack in front of the forklift tilts forward, and the fork rack in front of the forklift is in a forward tilting state, which is beneficial to fork the fork rack to pick up goods. When valve rod 200 communicates main oil feed passageway 120 and first branch oil passageway 130, the fork goods shelves hypsokinesis in fork hypsokinesis state in fork goods shelves in fork truck place ahead is favorable to the goods to remain stable on fork goods shelves, avoids the goods to fall. In order to push the valve rod 200 to move, the existing working valve plate adopts a manual mode to push the valve rod 200 to move, so that the operation comfort of the multi-way valve is reduced, and the control precision and the operation efficiency of the multi-way valve are reduced.
Referring to fig. 1 and 2, a problem that an existing working valve plate pushes a valve rod 200 to move manually, so that operation comfort of a multi-way valve is low, and control accuracy and operation efficiency of the multi-way valve are reduced is solved. The application provides a work valve block and including this work valve block's electric-hydraulic proportional multi-way valve, the work valve block includes valve body 100 and valve rod 200, valve body 100 is equipped with valve pocket 110, main oil feed passageway 120, first minute oil passageway 130 and second minute oil passageway 140, main oil feed passageway 120 communicates first minute oil passageway 130 and second minute oil passageway 140 through valve pocket 110, valve rod 200 movably locates in valve pocket 110 to control main oil feed passageway 120 and communicate first minute oil passageway 130 or communicate second minute oil passageway 140.
The valve body 100 is further provided with a first pressure passage 150 and a second pressure passage 160 respectively communicating with the valve chamber 110, and when the first pressure passage 150 is filled with pressure oil, the pressure oil can push the valve rod 200 to move, so that the main oil inlet passage 120 communicates with the first oil distribution passage 130. When the second pressure passage 160 is charged with pressurized oil, the pressurized oil can push the valve rod 200 to move, so that the main oil inlet passage 120 is communicated with the second branch oil passage 140. The service valve plate further includes a solenoid valve assembly 300, and the solenoid valve assembly 300 is used for controlling the on/off of the first pressure channel 150 and the second pressure channel 160.
As can be seen from the above, when the solenoid valve assembly 300 opens the first pressure passage 150, at this time, the second pressure passage 160 is closed, the pressure oil pushes the valve rod 200 to move through the first pressure passage 150, so that the main oil inlet passage 120 is communicated with the first oil distribution passage 130, the pressure oil enters the valve cavity 110 through the main oil inlet passage 120 and pushes the check valve 600 open, and then the pressure oil enters the first oil distribution passage 130 until the forklift truck in front tilts backwards. When the solenoid valve assembly 300 opens the second pressure passage 160, at this time, the first pressure passage 150 is closed, and the pressure oil pushes the valve rod 200 to move through the second pressure passage 160, so that the main oil inlet passage 120 is communicated with the second branch oil passage 140, the pressure oil passes through the main oil inlet passage 120 and pushes the check valve 600 open to enter the valve chamber 110, and then the pressure oil enters the second branch oil passage 140 until the forklift truck in front of the forklift truck tilts forward. So set up, realized the removal of valve rod 200 through the break-make of control solenoid valve subassembly 300, improved the operation travelling comfort of electro-hydraulic proportional multi-way valve greatly to and improved the control accuracy and the operating efficiency of electro-hydraulic proportional multi-way valve. That is, the working valve block and the electro-hydraulic proportional multi-way valve that this application provided have solved current working valve block and have adopted artifical manual mode to promote valve rod 200 and remove, cause the operating comfort of multi-way valve lower and the control accuracy of multi-way valve and the problem that operating efficiency descends.
Further, as shown in fig. 1 and 2, in order to improve the control accuracy of the solenoid valve assembly 300, the valve rod 200 is further provided with throttling grooves 210 distributed along the length direction, and the main oil inlet passage 120 communicates the first oil distribution passage 130 and the second oil distribution passage 140 through the throttling grooves 210. The throttle groove 210 can control the oil feeding amount of the first branch oil passage 130 and the second branch oil passage 140. By providing the throttling grooves 210 distributed along the length direction on the valve rod 200, the solenoid valve assembly 300 controls the moving distance of the valve rod 200 by controlling the oil inlet amount of the first pressure passage 150, and further controls the oil inlet amount of the main oil inlet passage 120 entering the first oil distribution passage 130, and finally realizes the control of the backward tilting speed of the fork rack. Similarly, by providing the throttling grooves 210 distributed along the length direction on the valve rod 200, the electromagnetic valve assembly 300 controls the moving distance of the valve rod 200 by controlling the oil inlet amount of the second pressure passage 160, and further controls the oil inlet amount of the main oil inlet passage 120 entering the second oil distribution passage 140, and finally realizes the control of the forward tilting speed and the backward tilting speed of the forklift fork rack, or the control of the lifting speed and the descending speed of the forklift, or the control of the action speed of the forklift accessories.
Specifically, the throttle groove 210 in the present application is a multiple circular groove, which is simple to process and has good flow stability. In other embodiments, the throttle slot 210 may also be an undercut slot, a tapered valve slot, a rectangular slot, a T-slot, or an axially triangular slot.
To achieve independent control of the first pressure passage 150 and the second pressure passage 160 by the solenoid valve assembly 300, in one embodiment, as shown in fig. 1 and 2, the solenoid valve assembly 300 includes a first solenoid valve 310 and a second solenoid valve 320, the first solenoid valve 310 is disposed at the first pressure passage 150, the first solenoid valve 310 is used for controlling on/off of the first pressure passage 150, the second solenoid valve 320 is disposed at the second pressure passage 160, and the second solenoid valve 320 is used for controlling on/off of the second pressure passage 160. By such arrangement, the first solenoid valve 310 can independently control the on-off of the first pressure channel 150, and the second solenoid valve 320 can independently control the on-off of the second pressure channel 160, thereby greatly facilitating the control of the solenoid valve assembly 300 on the first pressure channel 150 and the second pressure channel 160.
To facilitate assembly of the solenoid valve assembly 300 with the valve body 100, in one embodiment, as shown in fig. 1 and 2, the first solenoid valve 310 and the second solenoid valve 320 are disposed on the same side of the valve body 100. But not limited thereto, the first and second solenoid valves 310 and 320 may be provided at different sides of the valve body 100.
To facilitate the installation and removal of the solenoid valve assembly 300, in one embodiment, as shown in fig. 1 and 2, the first solenoid valve 310 is removably coupled to the valve body 100 and the second solenoid valve 320 is removably coupled to the valve body 100. Specifically, the first solenoid valve 310 is detachably mounted to the valve body 100 by fastening bolts, and the second solenoid valve 320 is detachably mounted to the valve body 100 by fastening bolts. But not limited thereto, the first solenoid valve 310 and the second solenoid valve 320 may be connected to the valve body 100 by means of a snap-fit.
Further, the first solenoid valve 310 is a proportional pressure reducing solenoid valve, and similarly, the second solenoid valve 320 is a proportional pressure reducing solenoid valve. So set up, the proportional pressure reducing solenoid valve controls the aperture of valve port through the size of control input current, the proportional pressure reducing solenoid valve controls the hydraulic pressure of the pressure fluid that gets into first pressure channel 150 and the hydraulic pressure of the pressure fluid that gets into second pressure channel 160 respectively through setting up the aperture of different valve ports, and then the aperture size of throttling groove 210 on the control valve rod 200 through the hydraulic pressure that sets up pressure fluid, finally realize the control to fork truck fork goods shelves speed of leaning forward and hypsokinesis, or realize the control to fork truck lifting speed and descending speed, or realize the control to the action speed of fork truck accessory.
To facilitate the communication between the first pressure channel 150 and the second pressure channel 160, in one embodiment, as shown in fig. 1 and 2, the valve body 100 is provided with a first communication channel 170 for communicating the first pressure channel 150 and the second pressure channel 160, and the first communication channel 170 is provided with a first high pressure plug 400 at an opening of the surface of the valve body 100. Specifically, the external tool opens the first pressure passage 150 and the second pressure passage 160 through the first communication passage 170, pressure oil may enter the first pressure passage 150 through the first solenoid valve 310, and pressure oil may enter the second solenoid valve 320 through the first communication passage 170, so that pressure oil may enter the second pressure passage 160 through the second solenoid valve 320. In order to prevent the first communication passage 170 from leaking, a first high pressure plug 400 is further provided at an opening of the first communication passage 170 on the surface of the valve body 100. It should be noted that the valve body 100 is further provided with a second communication passage 180, and the pressure oil is discharged out of the operating valve sheet through the second communication passage 180.
To better urge the valve stem 200 to move, in one embodiment, as shown in fig. 1 and 2, the first pressure passage 150 is provided at a first end of the valve stem 200 in communication with the valve chamber 110, and the second pressure passage 160 is provided at a second end of the valve stem 200 in communication with the valve chamber 110. Without limitation, the first pressure passage 150 may be in communication with the valve chamber 110 at other locations on the valve stem 200, and the second pressure passage 160 may be in communication with the valve chamber 110 at other locations on the valve stem 200, which are not illustrated.
For a more rapid return of the valve stem 200, in one embodiment, as shown in fig. 1 and 2, the first end of the valve stem 200 is provided with a first elastic member 500, and the first elastic member 500 is used for applying an elastic force to the first end of the valve stem 200 so that the valve stem 200 has a tendency to move from the first end toward the second end. Specifically, the first elastic member 500 is a compression spring.
The application also provides an electro-hydraulic proportional multi-way valve which comprises the working valve plate of any one of the embodiments.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. The working valve plate is characterized by comprising a valve body (100) and a valve rod (200), wherein the valve body (100) is provided with a valve cavity (110), a main oil inlet channel (120), a first oil distribution channel (130) and a second oil distribution channel (140), the main oil inlet channel (120) is communicated with the first oil distribution channel (130) and the second oil distribution channel (140) through the valve cavity (110), and the valve rod (200) is movably arranged in the valve cavity (110) to control the main oil inlet channel (120) to be communicated with the first oil distribution channel (130) or the second oil distribution channel (140);
the valve body (100) is further provided with a first pressure passage (150) and a second pressure passage (160) which are respectively communicated with the valve cavity (110), and when pressure oil is introduced into the first pressure passage (150), the pressure oil can push the valve rod (200) to move, so that the main oil inlet passage (120) is communicated with the first oil distribution passage (130); when the second pressure passage (160) is communicated with pressure oil, the pressure oil can push the valve rod (200) to move, so that the main oil inlet passage (120) is communicated with the second oil dividing passage (140); the working valve plate further comprises a solenoid valve assembly (300), and the solenoid valve assembly (300) is used for controlling the connection and disconnection of the first pressure channel (150) and the second pressure channel (160);
the valve rod (200) is provided with throttling grooves (210) distributed along the length direction, and the main oil inlet channel (120) is communicated with the first oil distribution channel (130) and the second oil distribution channel (140) through the throttling grooves (210).
2. The service valve plate according to claim 1, wherein the throttling groove (210) is an undercut groove, or the throttling groove (210) is a conical valve groove, or the throttling groove (210) is a rectangular groove, or the throttling groove (210) is surrounded by a T-shaped groove, or the throttling groove (210) is an axial triangular groove, or the throttling groove (210) is a multiple circular groove.
3. The service valve plate according to claim 1, wherein the solenoid valve assembly (300) comprises a first solenoid valve (310) and a second solenoid valve (320), the first solenoid valve (310) is used for controlling the on-off of the first pressure channel (150), and the second solenoid valve (320) is used for controlling the on-off of the second pressure channel (160).
4. The service valve plate according to claim 3, wherein the first solenoid valve (310) and the second solenoid valve (320) are disposed on the same side of the valve body (100).
5. The service valve plate according to claim 3, wherein the first solenoid valve (310) is detachably connected to the valve body (100), and the second solenoid valve (320) is detachably connected to the valve body (100).
6. The service valve plate according to claim 3, wherein the first solenoid valve (310) is a proportional pressure reducing solenoid valve; the second solenoid valve (320) is a proportional pressure reducing solenoid valve.
7. The service valve plate according to claim 1, wherein the communication between the first pressure channel (150) and the valve chamber (110) is provided at a first end of the valve stem (200), and the communication between the second pressure channel (160) and the valve chamber (110) is provided at a second end of the valve stem (200).
8. The service valve plate according to claim 7, wherein the first end of the valve rod (200) is provided with a first resilient member (500), and the first resilient member (500) is configured to exert a resilient action on the first end of the valve rod (200) so that the valve rod (200) has a tendency to move from the first end towards the second end.
9. The service valve plate according to claim 8, wherein the first resilient member (500) is a compression spring.
10. Electro-hydraulic proportional multi-way valve, comprising a working valve plate according to any one of claims 1 to 9.
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| CN202111606287.9A CN114294284B (en) | 2021-12-26 | 2021-12-26 | Working valve plate and electrohydraulic proportional multi-way valve |
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| CN202111606287.9A CN114294284B (en) | 2021-12-26 | 2021-12-26 | Working valve plate and electrohydraulic proportional multi-way valve |
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| CN114294284A true CN114294284A (en) | 2022-04-08 |
| CN114294284B CN114294284B (en) | 2024-04-09 |
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