Two-position three-way control type oil circuit board

Abstract

The invention belongs to the technical field of oil way plates, and discloses a two-position three-way control type oil way plate which comprises a plate body, at least one set of two-position three-way control valves arranged on the plate body and through holes formed in the plate body, the number of the through holes is the same as that of the two-position three-way control valves, and the two-position three-way control valves are arranged in the through holes; the two-position three-way control valve comprises a valve seat in threaded connection with the through hole, a valve cavity located in the valve seat, a liquid inlet channel, a liquid return channel, a load connecting channel and a compression spring arranged in the valve cavity, the liquid inlet channel, the liquid return channel and the load connecting channel are communicated with the valve cavity, and the two ends of the compression spring abut against the inner end face of the sealing seat a and the inner end face of the sealing seat b. And soft sealing rings are arranged at the outer ends of the sealing seat a and the sealing seat b. Due to the structure, the assembly time is shortened, the manufacturing cost is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of oil circuit boards and provides a two-position three-way control oil circuit board which can shorten assembly time, reduce manufacturing cost and prolong service life. Background Art

[0002] As a key component of the hydraulic system, the importance of the hydraulic oil circuit board is self-evident. It is not only the core component that controls the flow direction, pressure, flow and filtration of the hydraulic oil, but also bears the responsibility of ensuring the normal operation of the hydraulic system.

[0003] The existing hydraulic oil circuit board generally includes a plate body, a blind hole arranged on the plate body, a valve seat positioning nut located in the blind hole and a two-position three-way valve, the two-position three-way valve includes a valve seat, a valve cavity located on the valve seat, a liquid inlet channel, a liquid return channel and a load connection channel connected to the valve cavity, a sleeve located above the valve cavity, a valve core arranged in the sleeve, a hard sealing steel ball arranged between the valve cavity and the valve core, a piston rod of a cylinder located outside the valve core controls the valve core to move downward, the valve seat is threadedly connected to the valve seat positioning nut, and the valve seat positioning nut is threadedly connected to the blind hole. The on-off passage between the liquid inlet channel and the load connection channel, and the on-off passage between the load connection channel and the liquid return channel of the hydraulic oil circuit board of this type of structure are both realized by hard sealing steel balls.

[0004] The hydraulic oil circuit board of the above structure is prone to leaking hydraulic oil over time and has a short service life. It takes 30 to 40 minutes to assemble a set of hydraulic oil circuit boards. The processing technology of the blind holes to match the liquid inlet channels, return channels and load connection channels is difficult, which makes its manufacturing cost high. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a two-position three-way control oil circuit board which can shorten assembly time, reduce manufacturing cost and prolong service life.

[0006] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a two-position three-way control oil circuit board, comprising a plate body, at least one set of two-position three-way control valves arranged on the plate body, through holes arranged on the plate body, the number of the through holes being the same as the number of the two-position three-way control valves, and the two-position three-way control valves being arranged in the through holes; wherein: the two-position three-way control valve comprises a valve seat threadedly connected to the through hole, a valve cavity located in the valve seat, a liquid inlet channel, a liquid return channel and a load connection channel communicated with the valve cavity, a compression spring arranged in the valve cavity, the two ends of the compression spring tightly abutting against the inner end surfaces of a sealing seat a and a sealing seat b, and soft sealing rings are arranged on the outer ends of the sealing seat a and the sealing seat b; Under normal conditions, the outer end of the sealing seat a is tightly against the liquid outlet of the liquid inlet channel, and the outer end of the sealing seat b is tightly against the liquid inlet of the liquid return channel; The valve seat is provided with a cylinder piston rod installation cavity, and a cylinder integrated with the plate body is fixed on the side wall of the plate body at one end of the through hole, and the cylinder piston rod of the cylinder is located in the cylinder piston rod installation cavity.

[0007] In order to ensure the sealing between the valve seat and the inner wall of the through hole, in the above scheme, further: at least one sealing ring a is provided between the valve seat and the inner wall of the through hole and near the end position of the through hole.

[0008] In order to ensure the sealing between the cylinder piston rod and the cylinder piston rod installation cavity, in the above scheme, further: at least one sealing ring b is provided on the inner wall between the cylinder piston rod and the cylinder piston rod installation cavity.

[0009] In order to ensure the sealing between the cylinder piston and the inner wall of the inner cavity of the cylinder, in the above scheme, further: the tail of the cylinder piston rod is located in the inner cavity of the cylinder and is fixedly connected to the cylinder piston as a whole, and there is at least one sealing ring c between the cylinder piston and the inner wall of the inner cavity of the cylinder.

[0010] In order to facilitate the control of the sealing seat b, in the above scheme, further: the cylinder is connected to the air pump through a pipeline, and the air pump is connected to the air pressure source.

[0011] In order to facilitate real-time monitoring of the pressure on the liquid inlet channel, in the above scheme, further: the liquid inlet channel is provided with a bypass pipe connected thereto, and the bypass pipe is provided with a pressure gauge a or a pressure sensor.

[0012] In order to facilitate shared control after at least two sets of two-position three-way control valves are set, in the above scheme, further: the bypass pipeline is connected to the hydraulic pump through a main fluid supply pipeline equipped with a one-way valve, the hydraulic pump is connected to the hydraulic source, and a pressure gauge b or pressure sensor is provided on the main fluid supply pipeline.

[0013] In order to facilitate the recovery of the hydraulic oil after work, in the above scheme, further: the hydraulic pump is connected to the return liquid channel through a return pipe provided with a one-way valve.

[0014] In order to protect and transport the plate, in the above scheme, further: the plate is located in a box, the side wall of the box is provided with an openable and closable door, and the bottom plate of the box is provided with universal wheels.

[0015] To facilitate the subsequent connection of the load actuator, in the above solution, further: a load adapter is provided at the liquid outlet of the load connection channel.

[0016] The beneficial effects of the present invention are: The setting of through holes simplifies the processing technology and helps to reduce the manufacturing cost. The two-position three-way control valve can be loaded and unloaded from either end of the through hole, which facilitates later maintenance and improves loading and unloading efficiency; specifically, the time for assembling a set of hydraulic oil circuit boards can be shortened to 10 to 12 minutes.

[0017] The setting of the soft sealing ring effectively ensures the working pressure of the load actuator. The general design pressure is 25 MPa, and this structure can reach 35 MPa, which effectively ensures that the working medium does not leak and extends the service life of the two-position three-way control valve.

[0018] The setting of the soft sealing ring effectively ensures the pressure stabilization effect and can provide stable oil pressure to the load actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is an enlarged structural schematic diagram of a two-position three-way control valve of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the plate body of the present invention; Figure 4 It is a schematic diagram of the structure of each channel at the plate body of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the plate body of the present invention installed on the support frame in one direction; Figure 6 It is a schematic diagram of the three-dimensional structure of the plate body of the present invention installed on the support frame in another direction; Figure 7 This is a schematic diagram of the three-dimensional structure of the box body of the present invention when the door is opened; Figure 8 This is the hydraulic control principle diagram of the present invention; 1. Plate; 2. Through hole; 3. Two-position three-way control valve; 4. Valve seat; 5. Valve cavity; 6. Liquid inlet channel; 7. Liquid return channel; 8. Load connection channel; 9. Compression spring; 10. Sealing seat a; 11. Sealing seat b; 12. Soft sealing ring; 13. Cylinder piston rod installation cavity; 14. Cylinder; 15. Cylinder piston rod; 16. Sealing ring a; 17. Sealing ring b; 18. Cylinder piston; 19. Sealing ring c; 20. Air pump; 21. Air pressure source; 22. Pressure gauge a; 23. Bypass pipe; 24. Main liquid supply pipe; 25. Hydraulic pump; 26. Hydraulic source; 27. Pressure gauge b; 28. One-way valve; 29. ​​Box; 30. Door; 31. Universal wheel; 32. Load adapter; 33. Support frame; 34. Load working pressure gauge installation channel; 35. Sealing ring d; 36. Return pipe. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0021] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The present invention is further described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-8 As shown, the present invention provides a two-position three-way control oil circuit board, comprising a plate body 1, at least one set of two-position three-way control valves 3 arranged on the plate body 1, through holes 2 arranged on the plate body 1, the number of the through holes 2 is the same as the number of the two-position three-way control valves 3, and the two-position three-way control valves 3 are arranged in the through holes 2; wherein: the two-position three-way control valve 3 comprises a valve seat 4 threadedly connected to the through hole 2, a valve cavity 5 located in the valve seat 4, a liquid inlet channel 6, a liquid return channel 7 and a load connection channel 8 communicated with the valve cavity 5, and a compression spring 9 arranged in the valve cavity 5, the two ends of the compression spring 9 are tightly against the inner end surfaces of the sealing seat a10 and the sealing seat b11, and the outer ends of the sealing seat a10 and the sealing seat b11 are both provided with soft sealing rings 12; Under normal conditions, the outer end of the sealing seat a10 is tightly against the liquid outlet of the liquid inlet channel 6, and the outer end of the sealing seat b11 is tightly against the liquid inlet of the liquid return channel 7; The valve seat 4 is provided with a cylinder piston rod installation cavity 13, and a cylinder 14 integral with the plate body 1 is fixed on the side wall of the plate body 1 at one end of the through hole 2, and a cylinder piston rod 15 of the cylinder 14 is located in the cylinder piston rod installation cavity 13. In this embodiment, the load connection channel 8 can also be connected to a pressure gauge c through a load working pressure gauge installation channel 34.

[0023] To ensure the sealing between the valve seat 4 and the inner wall of the through hole 2 , in the above embodiment, preferably: at least one sealing ring a16 is provided between the valve seat 4 and the inner wall of the through hole 2 and near the end of the through hole 2 .

[0024] To ensure the sealing between the cylinder piston rod 15 and the cylinder piston rod installation cavity 13 , in the above embodiment, preferably: at least one sealing ring b17 is provided on the inner wall between the cylinder piston rod 15 and the cylinder piston rod installation cavity 13 .

[0025] In order to ensure the sealing between the cylinder piston 18 and the inner wall of the inner cavity of the cylinder 14, in the above embodiment, preferably: the tail of the cylinder piston rod 15 is located in the inner cavity of the cylinder 14 and is fixedly connected to the cylinder piston 18 as a whole, and there is at least one sealing ring c19 between the cylinder piston 18 and the inner wall of the inner cavity of the cylinder 14. In this embodiment, at least one sealing ring d35 is provided between the cylinder piston rod 15 and the cylinder piston 18.

[0026] To facilitate the control of the sealing seat b11 , in the above embodiment, preferably: the cylinder 14 is connected to the air pump 20 through a pipeline, and the air pump 20 is connected to the air pressure source 21 .

[0027] To facilitate real-time monitoring of the pressure on the liquid inlet channel 6, in the above embodiment, preferably: the liquid inlet channel 6 is provided with a bypass pipe 23 connected thereto, and the bypass pipe 23 is provided with a pressure gauge a22 or a pressure sensor.

[0028] In order to facilitate shared control after at least two sets of two-position three-way control valves 3 are provided, in the above embodiment, preferably: the bypass pipe 23 is connected to the hydraulic pump 25 through a main liquid supply pipe 24 provided with a one-way valve 28, and the hydraulic pump 25 is connected to the hydraulic source 26, and a pressure gauge b27 or a pressure sensor is provided on the main liquid supply pipe 24.

[0029] In order to facilitate the recovery of the hydraulic oil after operation, in the above embodiment, preferably: the hydraulic pump 25 is connected to the liquid return channel 7 via a return pipe 36 provided with a one-way valve.

[0030] In order to protect and transport the board 1 , in the above embodiment, preferably: the board 1 is located in a box 29 , a side wall of the box 29 is provided with an openable and closable door 30 , and a bottom plate of the box 29 is provided with universal wheels 31 .

[0031] To facilitate the subsequent connection with the load actuator, in the above embodiment, preferably: a load adapter 32 integrated therewith is provided at the liquid outlet of the load connection channel 8 .

[0032] In the above embodiment, the plate body 1, the air pump 20, the air pressure source 21, the hydraulic source 26, and the hydraulic pump 25 are all fixed on the support frame 33, and the support frame 33 is fixed on the bottom plate of the box body 29. The air pump 20, the hydraulic pump 25, the one-way valve 28, the pressure gauge a, the pressure gauge b, the one-way valve on the return pipe 36 or the pressure sensor and other programmable components can be program-controlled by a controller with a PLC control chip according to actual needs.

[0033] In all the above embodiments, the relevant components are conventional products sold in the market. The description of the program control part is for those skilled in the art to understand the present invention, and is not the inventive point of this solution.

[0034] The working process of the two-position three-way control oil circuit board described in the present invention is as follows: The hydraulic oil enters the hydraulic pump 25 from the hydraulic source 26 through the main liquid supply pipeline 24 (with a one-way valve 28), and the hydraulic pump 25 pumps the hydraulic oil to the bypass pipeline 23 (a pressure gauge a22 or a pressure sensor can be set to monitor the pressure). When the hydraulic oil needs to flow to the load connection channel 8, the hydraulic oil enters the liquid inlet channel 6 from the bypass pipeline 23 and pushes the sealing seat a10, the sealing seat a10 pushes the compression spring 9, and the compression spring 9 pushes the outer end of the sealing seat b11 to block the liquid inlet of the return liquid channel 7, so that after the liquid inlet channel 6 is connected to the load connection channel 8, the hydraulic oil flows to the load actuator through the load adapter 32. In this process, the one-way valve on the return pipe 36 is closed, and the one-way valve 28 of the main liquid supply pipeline 24 is opened.

[0035] When the load actuator completes its work and needs to recover the hydraulic oil, the air pump 20 obtains air pressure from the air pressure source 21 and provides air pressure to the cylinder 14 through the pipeline. The cylinder piston 18 pushes the cylinder piston rod 15 downward under the action of air pressure, and the front end of the cylinder piston rod 15 pushes the sealing seat b11 to overcome the elastic force of the compression spring 9, so that the outer end of the sealing seat b11 leaves the liquid inlet of the return liquid channel 7. At the same time, the sealing seat a10 is kept tightly against the liquid outlet of the liquid inlet channel 6 under the action of the compression spring 9 to prevent the hydraulic oil from flowing back. After the return liquid channel 7 is connected with the load connection channel 8, the hydraulic oil is pumped back to the hydraulic source 26 through the hydraulic pump 25 for reuse. In this process, the one-way valve on the return pipe 36 is opened, and the one-way valve 28 of the main liquid supply pipeline 24 is closed.

[0036] During the whole process, a pressure gauge a22 or a pressure sensor is provided on the bypass pipe 23 on the liquid inlet channel 6 to monitor the pressure of the hydraulic oil in real time. A pressure gauge b27 or a pressure sensor is provided on the main liquid supply pipe 24 to monitor the output pressure of the hydraulic pump 25. The box 29 protects the plate body 1, and a door 30 that can be opened and closed is provided on the side wall for easy maintenance and repair, and a universal wheel 31 is provided on the bottom plate for easy transportation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A two-position three-way control oil circuit board, comprising a board body (1), at least one set of two-position three-way control valves (3) arranged on the board body (1), through holes (2) arranged on the board body (1), the number of the through holes (2) being the same as the number of the two-position three-way control valves (3), and the two-position three-way control valves (3) being arranged in the through holes (2); characterized in that: The two-position three-way control valve (3) comprises a valve seat (4) threadedly connected to the through hole (2), a valve cavity (5) located in the valve seat (4), a liquid inlet channel (6), a liquid return channel (7) and a load connection channel (8) connected to the valve cavity (5), and a compression spring (9) arranged in the valve cavity (5), wherein both ends of the compression spring (9) are tightly pressed against the inner end surfaces of the sealing seat a (10) and the sealing seat b (11), and the outer ends of the sealing seat a (10) and the sealing seat b (11) are both provided with soft sealing rings (12); Under normal conditions, the outer end of the sealing seat a (10) is tightly against the liquid outlet of the liquid inlet channel (6), and the outer end of the sealing seat b (11) is tightly against the liquid inlet of the liquid return channel (7); The valve seat (4) is provided with a cylinder piston rod mounting cavity (13), and a cylinder (14) integral with the plate body (1) is fixed on the side wall of the plate body (1) at one end of the through hole (2), and the cylinder piston rod (15) of the cylinder (14) is located in the cylinder piston rod mounting cavity (13).

2. The two-position three-way control oil circuit board according to claim 1 is characterized in that: At least one sealing ring a (16) is provided between the valve seat (4) and the inner wall of the through hole (2) and at a position close to the end of the through hole (2).

3. The two-position three-way control oil circuit board according to claim 1 is characterized in that: At least one sealing ring b (17) is provided on the inner wall between the cylinder piston rod (15) and the cylinder piston rod mounting cavity (13).

4. The two-position three-way control oil circuit board according to claim 1 or 3, characterized in that: The tail of the cylinder piston rod (15) is located in the inner cavity of the cylinder (14) and is fixedly connected to the cylinder piston (18) as a whole, and at least one sealing ring c (19) is provided between the cylinder piston (18) and the inner wall of the inner cavity of the cylinder (14).

5. The two-position three-way control oil circuit board according to claim 4 is characterized in that: The air cylinder (14) is connected to an air pump (20) via a pipeline, and the air pump (20) is connected to an air pressure source (21).

6. The two-position three-way control oil circuit board according to claim 1, characterized in that: The liquid inlet channel (6) is provided with a bypass pipe (23) in communication therewith, and the bypass pipe (23) is provided with a pressure gauge a (22) or a pressure sensor.

7. The two-position three-way control oil circuit board according to claim 6 is characterized in that: The bypass pipeline (23) is connected to a hydraulic pump (25) via a main fluid supply pipeline (24) provided with a one-way valve (28); the hydraulic pump (25) is connected to a hydraulic source (26); and a pressure gauge b (27) or a pressure sensor is provided on the main fluid supply pipeline (24).

8. The two-position three-way control oil circuit board according to claim 7 is characterized in that: The hydraulic pump (25) is connected to the liquid return channel (7) via a return pipe (36) provided with a one-way valve.

9. The two-position three-way control oil circuit board according to claim 1, characterized in that: The plate body (1) is located in a box body (29); a side wall of the box body (29) is provided with an openable and closable door (30); and a bottom plate of the box body (29) is provided with universal wheels (31).

10. The two-position three-way control oil circuit board according to claim 1, characterized in that: A load adapter (32) is provided integrally with the load connection channel (8) at the liquid outlet.

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