Bus electromagnetic valve with manual control button

Abstract

The bus electromagnetic valve comprises a reversing valve, a reversing assembly and a switching block, the reversing assembly comprises a first electromagnetic pilot valve, a first shuttle valve and a first manual pilot valve, the output end of the first electromagnetic pilot valve and the output end of the first manual pilot valve are connected with the first shuttle valve through a liquid path, and the switching block is connected with the first shuttle valve through a liquid path. The output end of the first shuttle valve is connected with a liquid path of the reversing valve, so that the first electromagnetic pilot valve or the first manual pilot valve can be respectively communicated with the liquid path of the reversing valve through the first shuttle valve and control the reversing of the reversing valve; the switching block is connected with the reversing valve and the first electromagnetic reversing valve. The first manual pilot valve and the first electromagnetic pilot valve of the bus electromagnetic valve can independently control the reversing valve to work, the situation that emergency measures are lacked in underground or engineering application of the bus multi-way valve can be avoided, the bus electromagnetic valve can be suitable for various host scenes, and production safety is improved; meanwhile, the structure is more compact, and the reliability of hydraulic elements is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of electro-hydraulic control systems, and in particular to a bus solenoid valve with a manual control button. Background Art

[0002] The multi-way reversing valve is one of the key components in the hydraulic system. Manual direct operation of the multi-way valve increases the layout space of the whole machine, the system structure is not flexible, the operation intensity is large, and the flow hysteresis loop is increased; the hydraulic multi-way valve increases flexibility, simplifies the pipeline, and improves efficiency to a certain extent, but because the pilot valve and the main valve are connected by an oil circuit, the oil circuit volume is increased, the dynamic response is reduced, and the noise source is increased. With the maturity and wide application of electro-hydraulic proportional technology, the electro-hydraulic controlled multi-way valve makes the layout of the whole machine more compact, improves the dynamic response, and provides conditions for the automation of engineering machinery, especially in terms of electric pilot operation, wireless remote control and wired remote control operation. The application of bus-type multi-way valves can reduce control cables, achieve precise control, and monitor the operating status of the host in real time. In order to facilitate the maintenance of underground maintenance personnel, the bus solenoid valve is generally installed outward and equipped with manual emergency control. The general multi-way valve handle is set on the opposite side of the bus valve. After the hydraulic system pipeline is installed, it is not easy to operate and may malfunction. This requires a manual button control to be set on the bus solenoid valve to apply to various host hydraulic systems.

[0003] However, the existing multi-way valve with manual control has a complex structure, a large volume, is difficult to assemble, and has low versatility, and cannot meet the requirements of underground operations for compact hydraulic components, high reliability, and convenient maintenance.

[0004] Therefore, the prior art has the technical problems that the multi-way valve has a complex structure, a large volume, is difficult to assemble, and has low versatility, and cannot meet the requirements of underground operations for compact hydraulic components, high reliability, and convenient maintenance. Summary of the invention

[0005] The main purpose of the present invention is to provide a bus solenoid valve with a manual control button to solve the technical problems in the prior art that the existing multi-way valves are complex in structure, large in size, difficult to assemble, and have low versatility, and cannot meet the requirements of underground operations for compact hydraulic components, high reliability, and easy maintenance.

[0006] In order to achieve the above object, the present invention provides a bus solenoid valve with a manual control button, comprising:

[0007] Directional valve;

[0008] A reversing assembly, wherein the reversing assembly comprises a first electromagnetic pilot valve, a first shuttle valve and a first manual pilot valve, wherein the output end of the first electromagnetic pilot valve and the output end of the first manual pilot valve are respectively connected to the first shuttle valve fluid circuit, and the output end of the first shuttle valve is connected to the reversing valve fluid circuit, so that the first electromagnetic pilot valve or the first manual pilot valve can be respectively connected to the reversing valve fluid circuit through the first shuttle valve and control the reversing of the reversing valve;

[0009] The adapter block is respectively connected to the reversing valve and the first electromagnetic reversing valve, and the adapter block is provided with a first shuttle valve installation cavity and a first manual pilot valve installation cavity, and the first shuttle valve installation cavity and the first manual pilot valve installation cavity are both connected to the reversing valve fluid circuit.

[0010] Furthermore, the first manual pilot valve includes: a manual pilot valve body, the manual pilot valve body includes a valve cavity and a plunger located in the valve cavity and capable of reciprocating in the valve cavity, the A port of the manual pilot valve body is connected to the first shuttle valve fluid circuit; a button assembly, at least a portion of the button assembly is arranged opposite to the plunger, and can drive the plunger to move under the action of an external force.

[0011] Furthermore, the button assembly includes: a shell, in which a accommodating cavity with two ends open is formed; a push rod, which is located in the accommodating cavity and can reciprocate in the accommodating cavity; a return spring, which is sleeved on the push rod and provides a pre-tightening force to the push rod so that one end of the push rod is away from the plunger; a button body, at least a portion of which abuts against the push rod and can overcome the elastic force of the return spring and push the plunger to move under the action of external force.

[0012] Furthermore, the button assembly also includes: a pressure plate, one side of which abuts against the valve cavity and closes the valve cavity, the pressure plate is provided with an avoidance opening for the push rod to pass through, the avoidance opening is provided with a clamping groove on one side close to the valve cavity, and the push rod has a clamping portion that can be clamped with the clamping groove.

[0013] Furthermore, a sealing member is provided between the push rod and the avoidance opening.

[0014] Furthermore, an abutment portion is provided on a side of the push rod away from the pressure plate, one end of the return spring abuts against the abutment portion, and the other end of the return spring abuts against the pressure plate.

[0015] Furthermore, the button assembly also includes: a dust cap, which is in the shape of a tube with one end open, the dust cap is slidably connected to the accommodating cavity, the open end can cover the push rod, and the bottom of the dust cap abuts against the button body.

[0016] Furthermore, the dust cap and the button body are integrally formed.

[0017] Furthermore, a second sealing member is provided between the pressing plate and the adapter block.

[0018] Furthermore, the reversing assembly also includes a second solenoid pilot valve, a second shuttle valve and a second manual pilot valve, wherein the output end of the second solenoid pilot valve and the output end of the second manual pilot valve are respectively connected to the second shuttle valve fluid circuit, and the output end of the second shuttle valve is connected to the reversing valve fluid circuit, so that the second solenoid pilot valve or the second manual pilot valve can be connected to the reversing valve fluid circuit through the second shuttle valve and control the reversing of the reversing valve.

[0019] By applying the bus solenoid valve with a manual control button provided by the present invention, the first shuttle valve is set so that the first solenoid pilot valve or the first manual pilot valve can be connected to the reversing valve fluid circuit through the first shuttle valve and control the reversing of the reversing valve, so that the first manual pilot valve and the first solenoid pilot valve can each control the operation of the reversing valve independently. Through the first manual pilot valve, the lack of emergency measures in the bus multi-way valve underground or in engineering applications can be avoided, and it can be applicable to a variety of host scenarios; by setting the adapter block, the structure of the first pilot valve, the first shuttle valve and the first solenoid pilot valve can be made more compact, thereby improving the reliability of the hydraulic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of a bus solenoid valve with a manual control button according to the present invention is shown;

[0022] Figure 2 A hydraulic principle diagram of a bus solenoid valve with a manual control button according to the present invention is shown;

[0023] Figure 3 It shows a schematic structural diagram of a first manual pilot valve of a bus solenoid valve according to the present invention;

[0024] Figure 4 Shown as Figure 3 Cross-sectional view along section AA.

[0025] The above drawings include the following reference numerals:

[0026] 10. Reversing valve; 20. Reversing assembly; 21. First solenoid pilot valve; 22. First shuttle valve; 23. First manual pilot valve; 231. Manual pilot valve body; 232. Button assembly; 233. Shell; 234. Push rod; 235. Return spring; 236. Button body; 237. Pressure plate; 238. First sealing member; 239. Second sealing member; 24. Second solenoid pilot valve; 25. Second shuttle valve; 26. Second manual pilot valve; 30. Adapter block; 40. Hydraulic control block. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0030] In order to solve the technical problems in the prior art that the multi-way valve has a complex structure, large size, difficult assembly, low versatility, and cannot meet the requirements of underground operations for compact hydraulic components, high reliability and easy maintenance, the present invention provides a bus solenoid valve with a manual control button.

[0031] Figure 1 The structure diagram of the bus solenoid valve with a manual control button provided by the present invention is shown in FIG. Figures 1 to 4As shown, the bus solenoid valve with a manual control button includes a reversing valve 10, a reversing component 20 and a switching block 30, wherein the reversing component 20 includes a first solenoid pilot valve 21, a first shuttle valve 22 and a first manual pilot valve 23, the output end of the first solenoid pilot valve 21 and the output end of the first manual pilot valve 23 are respectively connected to the first shuttle valve 22 fluid circuit, the output end of the first shuttle valve 22 is connected to the reversing valve 10 fluid circuit, the switching block 30 is respectively connected to the reversing valve 10 and the first solenoid reversing valve 10, and the switching block 30 is provided with a first shuttle valve 22 installation cavity and a first manual pilot valve 23 installation cavity, and the first shuttle valve 22 installation cavity and the first manual pilot valve 23 installation cavity are both connected to the reversing valve 10 fluid circuit. By setting the first shuttle valve 22, the first solenoid pilot valve 21 or the first manual pilot valve 23 can be connected to the fluid path of the reversing valve 10 through the first shuttle valve 22 and control the reversing of the reversing valve 10, so that the first manual pilot valve 23 and the first solenoid pilot valve 21 can each independently control the operation of the reversing valve 10. Through the first manual pilot valve 23, the lack of emergency measures in the bus multi-way valve underground or in engineering applications can be avoided, and it can be applicable to a variety of host scenarios; by setting the adapter block 30, the structure of the first pilot valve, the first shuttle valve 22 and the first solenoid pilot valve 21 can be made more compact, thereby improving the reliability of the hydraulic components.

[0032] At the same time, in order to facilitate the connection of the fluid circuit, the bus solenoid valve also includes a fluid control block 40. The fluid control block 40 is arranged on one side of the reversing valve 30, and its structure is more compact than that of the handle assembly device.

[0033] Specifically, port A of the first solenoid pilot valve 21 is connected to port A of the first shuttle valve 22, port A of the first manual pilot valve 23 is connected to port B of the first shuttle valve 22, and port C of the first shuttle valve 22 is connected to the reversing valve 10, so that by controlling the first shuttle valve 22, both the first manual pilot valve 23 and the first solenoid pilot valve 21 can independently control the operation of the reversing valve 10.

[0034] Further, the first manual pilot valve 23 includes a manual pilot valve body 231 and a button assembly 232, wherein the manual pilot valve body 231 includes a valve cavity and a plunger located in the valve cavity and capable of reciprocating in the valve cavity. Optionally, the manual pilot valve is a two-position three-way valve, and the conversion of the fluid circuit is achieved by the movement of the plunger in the valve cavity. The A port of the manual pilot valve body 231 is connected to the B port fluid circuit of the first shuttle valve 22; at least a portion of the button assembly 232 is arranged opposite to the plunger, and can drive the plunger under the action of an external force, so that the plunger moves inside the valve cavity, so that the plunger can be driven to move by pushing the button assembly 232, so that the P port of the first manual pilot valve 23 is connected to the A port, and the hydraulic oil can enter the first shuttle valve 22 through the A port.

[0035] Specifically, the button assembly 232 includes a housing 233, a push rod 234, a return spring 235 and a button body 236. The housing 233 is formed with a receiving cavity with two ends open, and the push rod 234 is located in the receiving cavity and can reciprocate in the receiving cavity, so that when the push rod 234 moves in a direction close to the plunger, one end of the push rod 234 can abut against the plunger and push the plunger to move in the valve cavity. The return spring 235 is sleeved on the push rod 234 and provides a pre-tightening force to the push rod 234 so that one end of the push rod 234 is away from the plunger; at least a part of the button body 236 abuts against the push rod 234, and can push the push rod 234 to overcome the elastic force of the return spring 235 under the action of an external force, and then abut against one end of the plunger and push the plunger to move.

[0036] During use, when the reversing valve 10 needs to be manually adjusted, the push rod 234 can be driven to push the plunger to move by pushing the button body 236, thereby realizing the conversion of the liquid circuit in the manual pilot valve body 231.

[0037] Furthermore, the button assembly 232 further includes a pressing plate 237, one side of which abuts against the valve cavity and closes the valve cavity, and the pressing plate 237 is provided with an escape opening for the push rod 234 to pass through, and a clamping groove is provided on one side of the escape opening close to the valve cavity, and the push rod 234 has a clamping portion that can be clamped with the clamping groove. When the manual pilot valve is in the initial state, the push rod 234 abuts against the clamping groove under the preload force of the reset spring 235, that is, the clamping portion on the push rod 234 is clamped in the clamping groove.

[0038] In order to avoid oil leakage, a first seal 238 is arranged between the push rod 234 and the avoidance opening of the pressure plate 237. Preferably, the first seal 238 is a sliding seal ring, for example, a rubber seal ring. The sliding seal cooperation between the push rod 234 and the pressure plate 237 is achieved by the seal ring, which is beneficial to reduce product costs and facilitate later maintenance.

[0039] Specifically, the first manual pilot valve 23 is located in the first manual pilot valve 23 installation cavity on the adapter block 30, and one side of the pressure plate 237 abuts against the adapter block 30, so that the pressure plate 237 abuts against the valve cavity; optionally, a mounting hole is also provided on the adapter block 30, and the pressure plate 237 is fixedly connected to the adapter block 30 by means of screws; a second seal 239 for sealing oil is also provided on the abutting surface between the adapter block 30 and the pressure plate 237, wherein the second seal 239 can be, for example, a rubber sealing ring.

[0040] In a specific embodiment of the present application, an abutment portion is provided on the side of the push rod 234 away from the pressure plate 237, one end of the return spring 235 abuts against the abutment portion, and the other end of the return spring 235 abuts against the pressure plate 237, thereby fixing the return spring 235.

[0041] Specifically, the abutment portion is annular and is clamped on the push rod 234. The push rod 234 is provided with a mounting groove for fixing the abutment portion; the abutment portion may also be provided with an abutment groove for facilitating the abutment of the reset spring 235.

[0042] Furthermore, the button assembly 232 also includes a dust cap, which is in the shape of a tube with one end open, and is slidably connected to the accommodating cavity and can slide in the accommodating cavity. The open end of the dust cap can be covered on the push rod 234, and the bottom of the dust cap abuts against the button body 236, so that after the button body 236 is driven by an external force, the button body 236 drives the dust cap and the push rod 234 to move in the accommodating cavity; such an arrangement can prevent impurities from entering the accommodating cavity and contaminating the button assembly 232.

[0043] For ease of processing, the dust cap and the button body 236 can be integrally formed and processed; of course, the dust cap and the button body 236 can also be separately processed and then assembled and installed.

[0044] Furthermore, the reversing assembly 20 also includes a second solenoid pilot valve 24, a second shuttle valve 25 and a second manual pilot valve 26, wherein the output end of the second solenoid pilot valve 24 and the output end of the second manual pilot valve 26 are respectively connected to the fluid circuit of the second shuttle valve 25, and the output end of the second shuttle valve 25 is connected to the fluid circuit of the reversing valve 10, so that the second solenoid pilot valve 24 or the second manual pilot valve 26 can be connected to the fluid circuit of the reversing valve 10 through the second shuttle valve 25 and control the reversing of the reversing valve 10, thereby controlling the reversing valve 10 by controlling the first solenoid pilot valve 21 and the second solenoid pilot valve 24, and at the same time, controlling the reversing valve 10 can also be achieved by controlling the first manual pilot valve 23 and the second manual pilot valve 26.

[0045] During the operation of the bus solenoid valve disclosed in the present application, the control unit controls the first solenoid pilot valve 21 to be energized, and the solenoid valve moves so that the PP port of the first solenoid pilot valve 21 is connected to PA, and the system pilot control oil Pr is delivered to the first shuttle valve 22 through the first solenoid pilot valve 21. At this time, the button body 236 of the first manual pilot valve 23 is not pressed, and there is no pressure at the B port of the first shuttle valve 22. The first shuttle valve 22 moves toward the B port, and the closed pilot oil flows from the PA of the first manual pilot valve 23 to the PT, and the pilot control oil flows into the right chamber of the reversing valve 10 through the C port of the first shuttle valve 22 to reverse the reversing valve 10; when the first solenoid pilot valve 21 loses power, the first solenoid pilot valve 21 moves leftward under the action of the spring force, and the PA of the first solenoid pilot valve 21 is connected to PT, the reversing valve 10 is reset normally, and the hydraulic oil in the hydraulic control chamber is depressurized back to the oil tank normally.

[0046] When the first manual pilot valve 23 is used for emergency control, the button body 236 is pressed, and the plunger in the first manual pilot valve 23 moves, so that the PP and PA of the first pilot valve are connected, and the pilot oil enters the first shuttle valve 22 through the first pilot valve. At this time, the first electromagnetic pilot valve 21 is not energized, and the A port of the first shuttle valve 22 is in a low-pressure state. The first shuttle valve 22 moves toward the A port side to block the pilot oil from the PA port of the first pilot electromagnetic valve to the PT, thereby realizing the reversal of the manual reversing valve 10. When the button body 236 is released, the plunger moves under the action of the spring force, the PA port is connected to the PT port, the reversing valve 10 is reset normally, and the hydraulic oil in the hydraulic control chamber is normally depressurized back to the oil tank.

[0047] By using the bus solenoid valve with a manual control button provided in the present application, by setting the first shuttle valve 22, the first solenoid pilot valve 21 or the first manual pilot valve 23 can be connected to the fluid path of the reversing valve 10 through the first shuttle valve 22 and control the reversing of the reversing valve 10, so that the first manual pilot valve 23 and the first solenoid pilot valve 21 can each independently control the operation of the reversing valve 10. Through the first manual pilot valve 23, the lack of emergency measures in the underground or engineering applications of the bus multi-way valve can be avoided, and it can be applicable to a variety of host scenarios; by setting the adapter block 30, the structure of the first pilot valve, the first shuttle valve 22 and the first solenoid pilot valve 21 can be made more compact, thereby improving the reliability of the hydraulic components.

[0048] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bus solenoid valve with a manual control button, characterized in that: include: Directional valve; A reversing assembly, the reversing assembly comprising a first electromagnetic pilot valve, a first shuttle valve and a first manual pilot valve, wherein the output end of the first electromagnetic pilot valve and the output end of the first manual pilot valve are respectively connected to the first shuttle valve fluid circuit, and the output end of the first shuttle valve is connected to the reversing valve fluid circuit, so that the first electromagnetic pilot valve or the first manual pilot valve can be respectively connected to the reversing valve fluid circuit through the first shuttle valve and control the reversing of the reversing valve; The adapter block is respectively connected to the reversing valve and the first electromagnetic reversing valve, and the adapter block is provided with at least a first shuttle valve installation cavity and a first manual pilot valve installation cavity, and the first shuttle valve installation cavity and the first manual pilot valve installation cavity are both connected to the reversing valve fluid circuit.

2. The bus solenoid valve with a manual control button according to claim 1, characterized in that: The first manual pilot valve comprises: A manual pilot valve body, the manual pilot valve body comprising a valve cavity and a plunger located in the valve cavity and capable of reciprocating in the valve cavity, the port A of the manual pilot valve body being connected to the first shuttle valve fluid path; A button assembly, at least a portion of which is arranged opposite to the plunger and can drive the plunger to move under the action of an external force.

3. The bus solenoid valve with a manual control button according to claim 2, characterized in that: The button assembly comprises: A housing, wherein a receiving cavity with two ends open is formed in the housing; A push rod, the push rod is located in the housing and can reciprocate in the housing cavity; A return spring, which is sleeved on the push rod and provides a pre-tightening force to the push rod so that one end of the push rod is away from the plunger; A button body, at least a portion of which is in contact with the push rod and can overcome the elastic force of the return spring and push the plunger to move under the action of an external force.

4. The bus solenoid valve with a manual control button according to claim 3, characterized in that: The button assembly also includes: A pressure plate, one side of which abuts against the valve cavity and closes the valve cavity, the pressure plate is provided with an escape opening for the push rod to pass through, a clamping groove is provided on one side of the escape opening close to the valve cavity, and the push rod has a clamping portion that can be clamped with the clamping groove.

5. The bus solenoid valve with a manual control button according to claim 4, characterized in that: A first sealing member is arranged between the push rod and the avoidance opening.

6. The bus solenoid valve with a manual control button according to claim 4, characterized in that: A contact portion is provided on one side of the push rod away from the pressure plate, one end of the return spring contacts the contact portion, and the other end of the return spring contacts the pressure plate.

7. The bus solenoid valve with a manual control button according to claim 3, characterized in that: The button assembly also includes: The dust cap is in the shape of a tube with one end open, the dust cap is slidably connected to the accommodating cavity, the open end can cover the push rod, and the bottom of the dust cap abuts against the button body.

8. The bus solenoid valve with a manual control button according to claim 7, characterized in that: The dust cap is integrally formed with the button body.

9. The bus solenoid valve with a manual control button according to claim 4, characterized in that: A second sealing member is provided between the pressing plate and the adapter block.

10. The bus solenoid valve with a manual control button according to claim 1, characterized in that: The reversing assembly also includes a second solenoid pilot valve, a second shuttle valve and a second manual pilot valve, wherein the output end of the second solenoid pilot valve and the output end of the second manual pilot valve are respectively connected to the second shuttle valve fluid circuit, and the output end of the second shuttle valve is connected to the reversing valve fluid circuit, so that the second solenoid pilot valve or the second manual pilot valve can be connected to the reversing valve fluid circuit through the second shuttle valve and control the reversing of the reversing valve.

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