Transverse compensation type reversing valve plate with simplified load holding function and multi-way valve thereof

Abstract

The invention relates to the field of reversing valve plates, in particular to a transverse compensation type reversing valve plate with a simplified load holding function and a multi-way valve thereof.The transverse compensation type reversing valve plate with the simplified load holding function comprises a valve plate body, a valve element mounting groove is formed in the valve plate body, and a reversing valve element is mounted in the valve element mounting groove; reset springs are installed at the two ends of the reversing valve element, a connector P used for being connected with a hydraulic pump, a connector T1 and a connector T2 are arranged at the position, right opposite to the valve element installation groove, of the valve plate body, the connector T1 and the connector T2 are connected with an oil tank, and a connector A and a connector B which are connected with an actuator are arranged at the top of the valve plate body. According to the transverse compensation type reversing valve plate with the simplified load keeping function, the load keeping plug, the load keeping valve element and the load keeping spring are combined, the load keeping function is achieved, and compared with other design needing more parts, the structure is simpler, and the manufacturing cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] The invention relates to the field of reversing valve plates, in particular to a transverse compensation type reversing valve plate with a simplified load holding function and a multi-way valve thereof. Background Art

[0002] At present, all the multi-way valve reversing valve plates on the mini excavator market have a load holding function. The load holding function is realized by combining the load holding valve and the reversing valve plate to prevent the actuator from slipping when it stops. To realize the load holding function on the current multi-way valve of a mini excavator, mainstream manufacturers need to use 8 or more components to form a load holding valve. The structure is relatively complex, which reduces reliability and increases manufacturing costs. Moreover, the compensator of the multi-way valve products of the current mainstream manufacturers is difficult to disassemble after installation. The multi-way valve needs to be disassembled before it can be replaced, which greatly reduces the debugging efficiency.

[0003] Therefore, we propose a transverse compensation type reversing valve plate and a multi-way valve with a simplified load holding function to solve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a transverse compensation type reversing valve plate and a multi-way valve thereof with a simplified load holding function.

[0005] The transverse compensation type reversing valve disc with simplified load holding function provided by the present invention comprises a valve disc body, a valve core installation groove is provided in the valve disc body, a reversing valve core is installed in the valve core installation groove, return springs are installed at both ends of the reversing valve core, a P interface for connecting to a hydraulic pump, a T1 interface and a T2 interface for connecting to an oil tank are provided on the valve disc body directly opposite to the valve core installation groove, an A interface and a B interface connected to an actuator are provided on the top of the valve disc body, and control components for controlling the movement of the reversing valve core are installed at both ends of the valve disc body; A first flow channel and a second flow channel are sequentially arranged between the A interface and the valve core mounting groove; a load holding valve is installed on the valve plate body at the connection between the first flow channel and the second flow channel; the load holding valve comprises a load holding valve core for blocking the connection between the first flow channel and the second flow channel and a load holding plug installed on the valve plate body; the load holding plug and the load holding valve core are connected by a load holding spring; the load holding valve core is stepped; a force application surface is provided at the location where the outer diameter of the load holding valve core changes; a conical portion matching the valve plate body is provided at the end of the load holding valve core; a groove is provided at the top of the load holding valve core; a load holding pilot oil port is symmetrically provided on the side wall of the load holding valve core, and the load holding pilot oil port is connected to the groove; a cavity connected to the groove is provided in the valve plate body between the load holding plug and the load holding valve core; a pilot oil channel is provided in the valve plate body, and both ends of the pilot oil channel are respectively connected to the cavity and the valve core mounting groove.

[0006] Preferably, the valve core installation groove is provided with a first contact portion, a second contact portion, a third contact portion, a fourth contact portion, a fifth contact portion, a sixth contact portion, a seventh contact portion, an eighth contact portion, a ninth contact portion and a tenth contact portion from left to right in sequence, which cooperate with the reversing valve core; the reversing valve core is provided with a first matching portion that cooperates with the first contact portion and the second contact portion, a second matching portion that cooperates with the third contact portion, a third matching portion that cooperates with the fourth contact portion and the fifth contact portion, a fourth matching portion that cooperates with the fifth contact portion, a fifth matching portion that cooperates with the sixth contact portion, a sixth matching portion that cooperates with the seventh contact portion, a seventh matching portion that cooperates with the seventh contact portion and the eighth contact portion, and an eighth matching portion that cooperates with the ninth contact portion and the tenth contact portion; one end of the pilot oil passage is arranged opposite to the second contact portion, and the end of the pilot oil passage cooperates with the first contact portion; The T1 interface is arranged between the second contact portion and the third contact portion, and the T2 interface is arranged between the ninth contact portion and the tenth contact portion; The P interface is arranged between the sixth contact part and the seventh contact part; the end of the second flow channel is arranged between the third contact part and the fourth contact part; a third flow channel connected with the B interface is arranged in the valve plate body, one end of the third flow channel is arranged between the eighth contact part and the ninth contact part and connected with the valve core mounting groove, a fourth flow channel is arranged in the valve plate body, one end of the fourth flow channel is arranged between the fourth contact part and the fifth contact part, and the other end is arranged between the seventh contact part and the eighth contact part, a fifth flow channel and a sixth flow channel are arranged in the valve plate body, a compensator assembly is transversely installed in the valve plate body between the fifth flow channel and the sixth flow channel, one end of the fifth flow channel is arranged between the fifth contact part and the sixth contact part, one end of the sixth flow channel is arranged between the fourth contact part and the fifth contact part, a one-way valve is installed in the sixth flow channel, and an LS feedback oil flow channel is provided in the valve plate body facing the compensator assembly.

[0007] Preferably, a seventh flow channel and an eighth flow channel are provided in the valve plate body, one end of the seventh flow channel is connected to the T-interface, the other end of the seventh flow channel passes through the first contact part and the second contact part to maintain the pilot oil port facing the load, the two ends of the eighth flow channel are respectively connected to the third flow channel and the T-interface, and an overflow valve is installed on the valve plate body facing the seventh flow channel and the eighth flow channel.

[0008] Preferably, the compensator assembly includes a compensator plug embedded and installed on both sides of the valve plate body and a compensator arranged between the two compensator plugs, the side wall of one end of the compensator is provided with semicircular notches at equal angles, the side wall of the compensator is provided with an arc-shaped interconnecting groove between adjacent semicircular notches, the side wall of the compensator is provided with a notch groove connected to the adjacent semicircular notches, and the notch groove is opposite to one end of the sixth flow channel, and a T-shaped flow channel for connecting the LS feedback oil flow channel and the fifth flow channel is provided in the compensator.

[0009] Preferably, the control component is a hydraulic control component.

[0010] Preferably, a plurality of annular grooves are provided on the reversing valve core.

[0011] The multi-way valve also provided by the present invention includes a transverse compensation type reversing valve plate with a simplified load holding function, and also includes a first valve plate assembly arranged on one side of the transverse compensation type reversing valve plate with a simplified load holding function, and the first valve plate assembly is provided with a second valve plate assembly on the side of the transverse compensation type reversing valve plate with a simplified load holding function away from the transverse compensation type reversing valve plate with a simplified load holding function, and the first valve plate assembly is respectively installed with a first electric control assembly and a manual control assembly at both ends of the first valve plate assembly, and the second electric control assembly is installed at both ends of the second valve plate assembly, and a tail-joint valve block assembly is provided on one side of the second valve plate assembly, and a head-joint valve block assembly is provided on one side of the transverse compensation type reversing valve plate with a simplified load holding function.

[0012] Preferably, the first valve block assembly, the valve plate body, the first valve plate assembly, the second valve plate assembly and the tail valve block assembly are all provided with mounting holes, and the first valve block assembly, the valve plate body, the first valve plate assembly, the second valve plate assembly and the tail valve block assembly are connected by bolts installed in the mounting holes.

[0013] Preferably, the first electronic control component, the second valve plate component and the actuator of the transverse compensation type reversing valve plate with simplified load holding function are the same.

[0014] Compared with the related art, the present invention has the following beneficial effects: Simplified load holding function design: This structure realizes the load holding function through the combination of three components: a load holding plug, a load holding valve core and a load holding spring. Compared with other designs that require more components, the structure is simpler, reducing manufacturing costs and maintenance difficulties.

[0015] The stepped design of the load-holding valve core, the setting of the force-applying surface, and the connection between the load-holding pilot oil port and the groove enable the oil to exert an upward force on the force-applying surface, which, together with the load-holding spring, ensures that the valve core can tightly close the flow channel when stationary, preventing accidental movement caused by the load's own weight.

[0016] Efficient transverse compensator design: The compensator is installed horizontally, which allows for quick replacement of the valve disc after it is installed on the equipment, greatly shortening the debugging time of the compensator function.

[0017] The compensator adopts a design with six adjacent semicircular arc grooves that are independently separated, which improves the structural strength and avoids the risks of deformation and fracture that may occur during heat treatment.

[0018] Flexible control methods: This structure supports multiple control modes such as hydraulic control, electric control and manual control, which can be selected according to actual needs, improving the flexibility and convenience of control.

[0019] The coordinated use of the first electric control component, the second electric control component and the control component enables the same actuator to be operated in different control modes, thereby increasing the diversity and adaptability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the reversing valve plate of the present invention; Figure 2 It is a cross-sectional schematic diagram of the valve plate body of the present invention; Figure 3 It is a schematic diagram of the reversing valve core structure of the present invention; Figure 4 It is a cross-sectional schematic diagram of the reversing valve core of the present invention; Figure 5 It is a cross-sectional schematic diagram of a load holding valve core of the present invention; Figure 6 A schematic diagram of the position of the load-holding pilot oil port of the present invention; Figure 7 It is a schematic diagram of the compensator structure of the present invention; Figure 8 It is a schematic diagram of the position of the pilot oil passage inside the valve body of the present invention; Fig. 9 The oil flow direction of the right position of the reversing valve core of the present invention; Fig.10 It is a schematic diagram of the left reversing of the reversing valve core of the present invention; Fig.11 The oil flow direction of the reversing valve core in the left position of the present invention; Fig.12 It is a front schematic diagram of the multi-way valve of the present invention; Fig.13 It is a schematic diagram of the back side of the multi-way valve of the present invention; Fig.14 This is one of the structural schematic diagrams of the first valve plate assembly of the present invention; Fig.15This is the second structural schematic diagram of the first valve plate assembly of the present invention; Fig.16 This is one of the structural schematic diagrams of the second valve plate assembly of the present invention; Fig.17 This is the second structural schematic diagram of the second valve plate assembly of the present invention; Fig.18 It is the oil flow direction of the middle position of the reversing valve core of the present invention.

[0021] Numbers in the figure: 1. valve body; 2. valve core mounting groove; 3. reversing valve core; 4. reset spring; 5. P interface; 6. T1 interface; 7. T2 interface; 8. A interface; 9. B interface; 10. control assembly; 11. first flow channel; 12. second flow channel; 13. load holding valve; 14. load holding valve core; 14a. force application surface; 14b. conical portion; 15. load holding plug; 16. load holding spring; 17. groove; 18. load holding pilot oil port; 19. cavity; 20. pilot oil channel; 21. first contact portion; 22. second contact portion; 23. third contact portion; 24. fourth contact portion; 25. fifth contact portion; 26. sixth contact portion; 27. seventh contact portion; 28. eighth contact portion; 29. ​​ninth contact portion; 30. tenth contact portion; 31. first matching portion; 32. second Matching part; 33, third matching part; 34, fourth matching part; 35, fifth matching part; 36, sixth matching part; 37, seventh matching part; 38, eighth matching part; 39, third flow channel; 40, fourth flow channel; 41, fifth flow channel; 42, sixth flow channel; 43, compensator assembly; 44, one-way valve; 45, LS feedback oil flow channel; 46, seventh flow channel; 47, eighth flow channel; 48, overflow valve; 49, compensator plug; 50, compensator; 51, semicircular arc notch; 52, arc-shaped interconnecting groove; 53, notched groove; 54, T-shaped flow channel; 55, first valve plate assembly; 56, second valve plate assembly; 57, first electric control assembly; 58, manual control assembly; 59, second electric control assembly; 60, tail valve block assembly; 61, first valve block assembly; 62, bolt; 63, mounting hole; 64, annular groove. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0023] Please refer to Figures 1 to 11 and Fig.18A transverse compensation type reversing valve disc with simplified load holding function includes a valve disc body 1, a valve core installation groove 2 is provided in the valve disc body for accommodating a reversing valve core 3, and a return spring 4 is arranged at each end of the reversing valve core 3 to ensure that the valve core can automatically return to the initial position under different working conditions. The valve disc body 1 is provided with a variety of interfaces: the P interface 5 is used to connect the hydraulic pump, the T1 interface 6 and the T2 interface 7 are connected to the oil tank respectively, and the A interface 8 and the B interface 9 are used to connect the actuator. In addition, control components 10 are installed at both ends of the valve disc body 1 to control the movement of the reversing valve core 3; The A interface 8 is connected to the valve core installation groove 2 through the first flow channel 11 and the second flow channel 12. At the intersection of the first flow channel 11 and the second flow channel 12, a load holding valve 13 is installed, which includes a load holding valve core 14, a load holding plug 15 and a load holding spring 16. When the system is in a static state, the load holding valve 13 closes the connection between the first flow channel 11 and the second flow channel 12 through the action of the load holding spring 16 to prevent accidental movement caused by the dead weight of the load. The load holding valve core 14 is a stepped design, with a force application surface 14a provided at the outer diameter change position, and a tapered portion 14b at one end thereof to cooperate with the valve plate body 1. A groove 17 is provided on the top of the load holding valve core 14, and load holding pilot oil ports 18 are symmetrically distributed on the side wall. These oil ports are connected to the groove 17 to allow oil to flow. The cavity 19 is located between the load holding plug 15 and the load holding valve core 14 and is connected to the groove 17, while the pilot oil passage 20 connects the cavity 19 and the valve core mounting groove 2, so that the pilot oil can flow and affect the state of the load holding valve.

[0024] The valve core installation groove 2 is provided with a first contact portion 21, a second contact portion 22, a third contact portion 23, a fourth contact portion 24, a fifth contact portion 25, a sixth contact portion 26, a seventh contact portion 27, an eighth contact portion 28, a ninth contact portion 29 and a tenth contact portion 30 which cooperate with the reversing valve core 3 in sequence from left to right. The reversing valve core 3 is provided with a first matching portion 31 which cooperates with the first contact portion 21 and the second contact portion 22, a second matching portion 32 which cooperates with the third contact portion 23, a third matching portion 33 which cooperates with the fourth contact portion 24 and the fifth contact portion 25, a fourth matching portion 34 which cooperates with the fifth contact portion 25, a fifth matching portion 35 which cooperates with the sixth contact portion 26, a sixth matching portion 36 which cooperates with the seventh contact portion 27, a seventh matching portion 37 which cooperates with the seventh contact portion 27 and the eighth contact portion 28, and an eighth matching portion 38 which cooperates with the ninth contact portion 29 and the tenth contact portion 30; One end of the pilot oil passage 20 is disposed opposite to the second contact portion 22, and the end of the pilot oil passage 20 is matched with the first contact portion 21; The T1 interface 6 is arranged between the second contact portion 22 and the third contact portion 23, and the T2 interface 7 is arranged between the ninth contact portion 29 and the tenth contact portion 30; The P interface 5 is disposed between the sixth contact portion 26 and the seventh contact portion 27; the end of the second flow channel 12 is disposed between the third contact portion 23 and the fourth contact portion 24; The valve plate body 1 is provided with a third flow channel 39 connected to the B interface 9, one end of the third flow channel 39 is arranged between the eighth contact portion 28 and the ninth contact portion 29 and is connected to the valve core mounting groove 2, the valve plate body 1 is provided with a fourth flow channel 40, one end of the fourth flow channel 40 is arranged between the fourth contact portion 24 and the fifth contact portion 25, and the other end is arranged between the seventh contact portion 27 and the eighth contact portion 28, the valve plate body 1 is provided with a fifth flow channel 41 and a sixth flow channel 42, and a compensator assembly 43 is transversely installed in the valve plate body 1 between the fifth flow channel 41 and the sixth flow channel 42, one end of the fifth flow channel 41 is arranged between the fifth contact portion 25 and the sixth contact portion 26, one end of the sixth flow channel 42 is arranged between the fourth contact portion 24 and the fifth contact portion 25, a one-way valve 44 is installed in the sixth flow channel 42, and an LS feedback oil flow channel 45 is provided in the valve plate body 1 opposite to the compensator assembly 43.

[0025] A seventh flow channel 46 and an eighth flow channel 47 are provided in the valve plate body 1, one end of the seventh flow channel 46 is connected to the T1 interface 6, the other end of the seventh flow channel 46 passes through between the first contact portion 21 and the second contact portion 22 and is arranged opposite to the load-maintaining pilot oil port 18, and both ends of the eighth flow channel 47 are respectively connected to the third flow channel 39 and the T2 interface 7, and an overflow valve 48 is installed on the valve plate body 1 opposite to the seventh flow channel 46 and the eighth flow channel 47.

[0026] The compensator assembly 43 includes a compensator plug 49 embedded and installed on both sides of the valve plate body 1 and a compensator 50 arranged between the two compensator plugs 49, and the side wall of one end of the compensator 50 is provided with a semicircular arc groove 51 at an equal angle, and the side wall of the compensator 50 is located between adjacent semicircular arc grooves 51 and has an arc-shaped interconnecting groove 52. The side wall of the compensator 50 is provided with a notch groove 53 connected to the adjacent semicircular arc groove 51, and the notch groove 53 is opposite to one end of the sixth flow channel 42. The compensator 50 is provided with a T-shaped flow channel 54 for connecting the LS feedback oil flow channel 45 and the fifth flow channel 41.

[0027] The control component 10 is a hydraulic control component.

[0028] The reversing valve core 3 is provided with a plurality of annular grooves 64 , and the large flow area reduces the pressure loss of the oil flowing through the grooves, thereby improving the flow capacity of the valve plate.

[0029] Please refer to Figures 7 to 11A multi-way valve includes a transverse compensation type reversing valve plate with a simplified load holding function, and also includes a first valve plate assembly 55 arranged on one side of the transverse compensation type reversing valve plate with a simplified load holding function, a second valve plate assembly 56 is arranged on the side of the first valve plate assembly 55 away from the transverse compensation type reversing valve plate with a simplified load holding function, a first electric control assembly 57 and a manual control assembly 58 are respectively installed at both ends of the first valve plate assembly 55, a second electric control assembly 59 is installed at both ends of the second valve plate assembly 56, a tail-joint valve block assembly 60 is arranged on one side of the second valve plate assembly 56, and a first-joint valve block assembly 61 is arranged on one side of the transverse compensation type reversing valve plate with a simplified load holding function.

[0030] The first valve block assembly 61, the valve plate body 1, the first valve plate assembly 55, the second valve plate assembly 56 and the tail valve block assembly 60 are all provided with mounting holes 63. The first valve block assembly 61, the valve plate body 1, the first valve plate assembly 55, the second valve plate assembly 56 and the tail valve block assembly 60 are connected by bolts 62 installed in the mounting holes 63, which is convenient for connecting multiple valve plates.

[0031] It should be emphasized that: the first valve plate assembly 55 and the second valve plate assembly 56 are both provided with oil circuit interfaces, and the oil circuit interfaces of the first valve block assembly 61, the valve plate body 1, the first valve plate assembly 55, the second valve plate assembly 56 and the tail valve block assembly 60 are interconnected, which are commonly used methods by people in this field and will not be described here.

[0032] The first electronic control component 57, the second valve plate component 56 and the actuator of the transverse compensation type reversing valve plate with simplified load holding function are the same, and multiple control modes of one actuator can be realized.

[0033] It should be emphasized that the hydraulic control component, the first electric control component 57, the manual control component 58 and the second electric control component 59 are all means commonly used by people in this field and will not be described here.

[0034] Explanation of the horizontal placement and structural optimization of compensator 50: The installation interface of the compensator of the multi-way valve for mini excavators of the mainstream manufacturers in the current market is located on the installation bottom surface of the multi-way valve. Once the multi-way valve is installed on the mini excavator, the compensator 50 cannot be quickly replaced. The structure of the mini excavator itself is very compact, and it is difficult to disassemble and reinstall the multi-way valve, which greatly increases the time cost of compensator debugging. The compensator plug 49 and the compensator 50 installation port are placed horizontally relative to the valve plate body 1. Even if the multi-way valve is installed in the cabin of the mini excavator, the compensator 50 can be replaced by removing the compensator plug 49 on either side of the left and right sides, which shortens the debugging time of the compensator 50 function by at least 10 times. The compensator 50 adopts a design of six adjacent semicircular arc notches 51 that are independently separated. While improving the structural strength of the compensator 50, it avoids the risk of deformation and fracture that is easy to occur during heat treatment.

[0035] Working principle of load holding valve 13: A interface 8, first flow channel 11, load holding pilot oil port 18, groove 17, cavity 19 and pilot oil channel 20 are connected. When the reversing valve core is in the middle position, the first contact part 21, the second contact part 22, the third contact part 23, the fourth contact part 24, the fifth contact part 25, the sixth contact part 26, the seventh contact part 27, the eighth contact part 28, the ninth contact part 29 and the tenth contact part 30 are all blocked and sealed by the reversing valve core 3. At this time, due to the deadweight of the load, the working oil port (A interface 8) at the load holding end is the oil inlet. At this time, the load holding valve 13 is in a closed state under the action of the load holding spring 16, and the oil passes through the load The load-holding pilot oil port 18 of the load-holding valve core 14 flows into the groove 17. At this time, the reversing valve core 3 makes one end of the pilot oil passage 20 on the valve plate body 1 blocked and closed (the first contact portion 21 of the reversing valve core 3 is blocked with one end of the pilot oil passage 20). Therefore, there is no flow of oil in the groove 17 and the upper and lower chambers of the load-holding valve 13. The oil generates an upward force on the force-applying surface 14a. The area of ​​the force-applying surface 14a is smaller than the area of ​​the bottom of the groove 17. According to the formula P=F / S, F is the pressure, and S is the force area. The upward force of the oil on the force-applying surface 14a is smaller than the force of the oil on the bottom of the groove 17. Combined with the load-holding spring 16, the load-holding valve core 14 is pressed against the valve plate body 1.

[0036] When the actuator starts to move from the load holding state, the control reversing valve core 3 moves to the left for reversing. The load holding end working oil port (A interface 8) is the oil inlet, and the end of the pilot oil channel 20 will not be blocked by the first contact part 21. At this time, a branch of oil passes through the first flow channel 11, the load holding pilot oil port 18, the groove 17, the cavity 19, the pilot oil channel 20, and the inside of the first contact part 21 to return to the oil tank from the T1 interface. The oil passes through the load holding pilot oil port 18 on the load holding valve core 14 to generate throttling, so that the upward force of the oil on the force application surface 14a is greater than the force of the oil on the bottom of the groove 17. Combined with the joint action of the load holding spring 16, the load holding valve 13 is opened, allowing the working oil to pass through the first flow channel 11, the second flow channel 12, the inside of the third contact part 23 and finally return to the oil tank through the T1 interface 6.

[0037] Advantages: The load holding function is completed by the combination of only three components, namely, the load holding plug 15, the load holding valve core 14, and the load holding spring 16. Compared with other manufacturers that require eight components to complete the load holding function, the structure is simple; The B interface 9 serves as the oil outlet. The high-pressure oil from the hydraulic pump enters the space between the sixth contact part 26 and the seventh contact part 27 through the P interface 5, enters the fifth flow channel 41 through the inner side of the sixth contact part 26, enters the sixth flow channel 42 through the compensator 50, and then passes along the fourth flow channel 40 through the space between the seventh contact part 27 and the eighth contact part 28, passes through the eighth contact part 28 into the third flow channel 39, and finally enters the actuator from the B interface 9.

[0038] When the actuator starts to move from the load holding state, the control valve core 3 moves to the right and changes direction. The high-pressure oil from the hydraulic pump enters the space between the sixth contact part 26 and the seventh contact part 27 through the P interface 5, enters the fifth flow channel 41 through the inner side of the sixth contact part 26, enters the sixth flow channel 42 through the compensator 50, and then enters the second flow channel 12 through the inner side of the fourth contact part 24. The oil pushes the load-holding valve core 14 upward, so that the oil enters the A interface 8 along the first flow channel 11. The oil discharged from the B interface 9 passes through the third flow channel 39 along the inner side of the ninth contact part 29 into between the ninth contact part 29 and the tenth contact part 30, and flows back to the oil tank from the T2 interface 7.

[0039] A one-way valve 44 is installed in the sixth flow channel 42. No matter the reversing valve core changes direction to the left or right, the oil from the hydraulic pump passes through the same one-way valve 44, so that the non-return function of the single-link working valve plate can be realized by using one one-way valve 44.

[0040] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A transverse compensation type reversing valve disc with simplified load holding function, comprising a valve disc body (1), wherein a valve core installation groove (2) is provided in the valve disc body (1), a reversing valve core (3) is installed in the valve core installation groove (2), and return springs (4) are installed at both ends of the reversing valve core (3), and a P interface (5) for connecting to a hydraulic pump, a T1 interface (6) and a T2 interface (7) for connecting to an oil tank are provided on the valve disc body (1) at a position opposite to the valve core installation groove (2), and an A interface (8) and a B interface (9) for connecting to an actuator are provided on the top of the valve disc body (1), characterized in that: Control components (10) for controlling the movement of the reversing valve core (3) are installed at both ends of the valve plate body (1); A first flow channel (11) and a second flow channel (12) are provided in sequence between the A interface (8) and the valve core installation groove (2); a load holding valve (13) is installed on the valve plate body (1) at the connection between the first flow channel (11) and the second flow channel (12); the load holding valve (13) comprises a load holding valve core (14) for blocking the connection between the first flow channel (11) and the second flow channel (12) and a load holding plug (15) installed on the valve plate body (1); the load holding plug (15) and the load holding valve core (14) are connected via a load holding spring (16); the load holding valve core (14) is stepped; and the outer diameter of the load holding valve core (14) changes. A force-applying surface (14a) is provided at the end of the load-holding valve core (14), a conical portion (14b) matching with the valve plate body (1), a groove (17) is provided at the top of the load-holding valve core (14), a load-holding pilot oil port (18) is symmetrically provided on the side wall of the load-holding valve core (14), and the load-holding pilot oil port (18) is communicated with the groove (17), a cavity (19) communicated with the groove (17) is provided in the valve plate body (1) between the load-holding plug (15) and the load-holding valve core (14), and a pilot oil passage (20) is provided in the valve plate body (1), and two ends of the pilot oil passage (20) are respectively communicated with the cavity (19) and the valve core mounting groove (2).

2. The transverse compensation type reversing valve disc with simplified load holding function according to claim 1, characterized in that: The valve core installation groove (2) is provided with a first contact portion (21), a second contact portion (22), a third contact portion (23), a fourth contact portion (24), a fifth contact portion (25), a sixth contact portion (26), a seventh contact portion (27), an eighth contact portion (28), a ninth contact portion (29) and a tenth contact portion (30) from left to right for cooperating with the reversing valve core (3); the reversing valve core (3) is provided with a first matching portion (31) for cooperating with the first contact portion (21) and the second contact portion (22), a third contact portion (23), a fourth contact portion (24), a fifth contact portion (25), a sixth contact portion (26), a seventh contact portion (27), an eighth contact portion (28), a ninth contact portion (29) and a tenth contact portion (30) 3) a second matching portion (32) matching with the fourth contact portion (24) and the fifth contact portion (25), a fourth matching portion (34) matching with the fifth contact portion (25), a fifth matching portion (35) matching with the sixth contact portion (26), a sixth matching portion (36) matching with the seventh contact portion (27), a seventh matching portion (37) matching with the seventh contact portion (27) and the eighth contact portion (28), and an eighth matching portion (38) matching with the ninth contact portion (29) and the tenth contact portion (30); one end of the pilot oil passage (20) is arranged opposite to the second contact portion (22), and the end of the pilot oil passage (20) matches with the first contact portion (21); The T1 interface (6) is arranged between the second contact portion (22) and the third contact portion (23), and the T2 interface (7) is arranged between the ninth contact portion (29) and the tenth contact portion (30); the P interface (5) is arranged between the sixth contact portion (26) and the seventh contact portion (27); the end of the second flow channel (12) is arranged between the third contact portion (23) and the fourth contact portion (24); The valve plate body (1) is provided with a third flow channel (39) in communication with the B interface (9); one end of the third flow channel (39) is arranged between the eighth contact portion (28) and the ninth contact portion (29) and is in communication with the valve core mounting groove (2); the valve plate body (1) is provided with a fourth flow channel (40); one end of the fourth flow channel (40) is arranged between the fourth contact portion (24) and the fifth contact portion (25), and the other end is arranged between the seventh contact portion (27) and the eighth contact portion (28); the valve plate body (1) is provided with a fifth flow channel (41) and A sixth flow channel (42), a compensator assembly (43) is transversely installed in the valve plate body (1) between the fifth flow channel (41) and the sixth flow channel (42), one end of the fifth flow channel (41) is arranged between the fifth contact portion (25) and the sixth contact portion (26), one end of the sixth flow channel (42) is arranged between the fourth contact portion (24) and the fifth contact portion (25), a one-way valve (44) is installed in the sixth flow channel (42), and an LS feedback oil flow channel (45) is provided in the valve plate body (1) directly opposite to the compensator assembly (43).

3. The transverse compensation type reversing valve disc with simplified load holding function according to claim 2, characterized in that: A seventh flow channel (46) and an eighth flow channel (47) are provided in the valve plate body (1); one end of the seventh flow channel (46) is in communication with the T1 interface (6); the other end of the seventh flow channel (46) is arranged between the first contact portion (21) and the second contact portion (22) and is directly opposite to the load-holding pilot oil port (18); two ends of the eighth flow channel (47) are respectively in communication with the third flow channel (39) and the T2 interface (7); and a relief valve (48) is installed on the valve plate body (1) directly opposite to the seventh flow channel (46) and the eighth flow channel (47).

4. The transverse compensation type reversing valve disc with simplified load holding function according to claim 3, characterized in that: The compensator assembly (43) comprises compensator plugs (49) embedded and installed on both sides of the valve plate body (1) and a compensator (50) arranged between the two compensator plugs (49); a side wall at one end of the compensator (50) is provided with semicircular arc-shaped notches (51) at equal angles; a side wall of the compensator (50) is provided with an arc-shaped interconnecting groove (52) between adjacent semicircular arc-shaped notches (51); a side wall of the compensator (50) is provided with a notch groove (53) communicating with adjacent semicircular arc-shaped notches (51), and the notch groove (53) is directly opposite to one end of the sixth flow channel (42); and a T-shaped flow channel (54) for connecting the LS feedback oil flow channel (45) and the fifth flow channel (41) is provided in the compensator (50).

5. The transverse compensation type reversing valve disc with simplified load holding function according to claim 1, characterized in that: The control component (10) is a hydraulic control component.

6. The transverse compensation type reversing valve disc with simplified load holding function according to claim 1, characterized in that: The reversing valve core (3) is provided with a plurality of annular grooves (64).

7. A multi-way valve, comprising a transverse compensation type reversing valve plate with simplified load holding function as claimed in any one of claims 1 to 6, characterized in that: It also includes a first valve plate assembly (55) arranged on one side of a transverse compensation type reversing valve plate with a simplified load holding function, a second valve plate assembly (56) is arranged on the side of the first valve plate assembly (55) away from the transverse compensation type reversing valve plate with a simplified load holding function, a first electric control assembly (57) and a manual control assembly (58) are respectively installed at both ends of the first valve plate assembly (55), a second electric control assembly (59) is installed at both ends of the second valve plate assembly (56), a tail valve block assembly (60) is arranged on one side of the second valve plate assembly (56), and a head valve block assembly (61) is arranged on one side of the transverse compensation type reversing valve plate with a simplified load holding function.

8. The multi-way valve according to claim 7, characterized in that: The first valve block assembly (61), the valve plate body (1), the first valve plate assembly (55), the second valve plate assembly (56) and the tail valve block assembly (60) are all provided with mounting holes (63); the first valve block assembly (61), the valve plate body (1), the first valve plate assembly (55), the second valve plate assembly (56) and the tail valve block assembly (60) are connected via bolts (62) installed in the mounting holes (63).

9. The multi-way valve according to claim 7, characterized in that: The first electronic control component (57), the second valve plate component (56) and the actuator of the transverse compensation type reversing valve plate with simplified load holding function are the same.

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