An integrated valve block

Abstract

The present application relates to an integrated valve block, belonging to the technical field of fluid control valve groups. It includes a boosting valve group, which includes a first boosting solenoid valve, a first boosting throttle valve, and a first boosting check valve connected in series; a pressure compensation valve group, which includes an accumulator, a first pressure compensation throttle valve, a first pressure compensation check valve, and a first pressure compensation solenoid valve connected in series. The oil circuit formed by the first pressure compensation throttle valve, the first pressure compensation check valve, and the first pressure compensation solenoid valve is connected in parallel with the boosting valve group, and the accumulator is also connected to an oil pump; a pressure relief valve group, which is connected in parallel with the boosting valve group, includes a first pressure relief solenoid valve and a first pressure relief throttle valve connected in series, and an oil storage part is connected to the oil outlet end of the pressure relief valve group. In the present application, the boosting valve group, the pressure relief valve group, and the pressure compensation valve group are connected in parallel to achieve the integrated setting of the boosting valve group, the pressure relief valve group, and the pressure compensation valve group, significantly reducing the volume of the control valve group of the hydraulic system and improving the problem of the large volume of the hydraulic system of the laminator.

Description

Technical Field

[0001] This application relates to the technical field of fluid control valve groups, and in particular to an integrated valve block. Background Art

[0002] A laminator refers to a mechanical device that presses multiple layers of materials together. It is mainly a device that presses multiple layers of plates into a rigid whole under the conditions of high temperature and vacuum.

[0003] The laminator mainly relies on a hydraulic system to perform the lamination operation. The two ends of the hydraulic system are respectively connected to an oil pump and a hydraulic cylinder. The hydraulic system controls the oil volume and oil pressure in the hydraulic cylinder of the laminator, and performs pressurization, pressure stabilization, and pressure relief control on the oil circuit, and finally realizes the lamination work of the laminator.

[0004] The hydraulic system in the related art includes a pressurizing valve group, a pressure stabilizing valve group, and a pressure relief valve group. The pressurizing valve group, the pressure stabilizing valve group, and the pressure relief valve group are separately arranged and independently control the hydraulic oil circuit.

[0005] In view of the above related art, the inventor found that since the valve groups in the related art are independently controlled, the volume of the hydraulic system is relatively large, resulting in an increase in the volume of the hydraulic supporting system related to the laminator. Summary of the Invention

[0006] In order to improve the problem of the relatively large volume of the hydraulic system of the laminator, this application provides an integrated valve block.

[0007] The integrated valve block provided by this application adopts the following technical solution:

[0008] An integrated valve block includes a pressurizing valve group, one end is connected to an oil pump, and the other end is connected to a hydraulic cylinder, and includes a first pressurizing solenoid valve, a first pressurizing throttle valve, and a first pressurizing check valve connected in series; a pressure replenishing valve group, including an accumulator, a first pressure replenishing throttle valve, a first pressure replenishing check valve, and a first pressure replenishing solenoid valve connected in series. The oil circuit formed by the first pressure replenishing throttle valve, the first pressure replenishing check valve, and the first pressure replenishing solenoid valve is connected in parallel with the pressurizing valve group, and the accumulator is also connected to the oil pump; a pressure relief valve group, connected in parallel with the pressurizing valve group, includes a first pressure relief solenoid valve and a first pressure relief throttle valve connected in series, and an oil storage member is connected to the oil outlet end of the pressure relief valve group.

[0009] By adopting the above technical solution, when the integrated valve block works, the oil pump supplies liquid to the integrated valve block. Part of the oil passes through the boosting valve group and is delivered to the hydraulic cylinder through the boosting valve group, realizing the preliminary pressure supply of the integrated valve block to the hydraulic cylinder; part of the oil is delivered and stored in the pressure compensation valve group. After the boosting valve group completes the pressure supply to the hydraulic cylinder, the pressure compensation valve group supplies liquid to the hydraulic cylinder for the second time until the preset hydraulic value is reached and maintained continuously. When the hydraulic cylinder returns, the oil in the hydraulic cylinder is discharged through the pressure relief valve group.

[0010] By connecting the boosting valve group, the pressure relief valve group, and the pressure compensation valve group in parallel, the integrated setting of the boosting valve group, the pressure relief valve group, and the pressure compensation valve group is realized, significantly reducing the volume of the control valve group of the hydraulic system and improving the problem of the large volume of the hydraulic system of the laminator.

[0011] Optionally, it further includes a buffer valve group. The buffer valve group is connected in parallel with the boosting valve group. The buffer valve group includes a first buffer solenoid valve and a first buffer check valve. The first buffer solenoid valve is signal-connected to the first boosting solenoid valve.

[0012] By adopting the above technical solution, the buffer valve group can quickly supply oil to the hydraulic cylinder independently; when the oil pump supplies liquid to the boosting valve group and the buffer valve group at the same time, the first buffer solenoid valve detects the passing of the oil, closes the first buffer solenoid valve, and then controls the opening of the first boosting solenoid valve to play a buffering role, reducing the risk of hydraulic pressure surging in the valve block during the initial oil supply of the valve block and causing damage to the hydraulic cylinder.

[0013] Optionally, it further includes a voltage stabilizing valve group. The voltage stabilizing valve group is connected in parallel with the pressure relief valve group. The voltage stabilizing valve group includes a first voltage stabilizing solenoid valve and a first voltage stabilizing throttle valve.

[0014] By adopting the above technical solution, by setting the voltage stabilizing valve group, when the pressure compensation valve group supplies liquid to the hydraulic cylinder, it may cause the pressure in the hydraulic cylinder to exceed the preset value. Then the voltage stabilizing valve group discharges the oil in the hydraulic cylinder, making the hydraulic value in the hydraulic cylinder return to the preset range again and keeping the output oil pressure of the integrated valve block to the hydraulic cylinder stable and moderate.

[0015] By adopting the above technical solution, it further includes a first boosting overflow valve. The pressure end of the first boosting overflow valve is connected to the oil outlet end of the boosting valve group, and the other end is connected to the oil storage part.

[0016] By adopting the above technical solution, by setting the first boosting overflow valve, when the system gets out of control and the overpressure seriously exceeds the preset pressure value of the system, the first boosting overflow valve opens to discharge the oil, reducing the hydraulic pressure output by the boosting valve group and improving the influence of the pressure surging of the boosting valve group on the hydraulic cylinder.

[0017] Optionally, it further includes a second pressurizing overflow valve, and the pressure end of the second pressurizing overflow valve is connected to the oil pump and the liquid inlet end of the pressurizing valve group.

[0018] By adopting the above technical solution, by setting the second pressurizing overflow valve, when the oil pump supplies liquid to the pressurizing valve group, the initial output pressure of the oil pump will be relatively high. When the pipeline between the pressurizing valve group and the oil pump is severely overpressurized, the second pressurizing overflow valve discharges the oil between the oil pump and the pressurizing valve group, reducing the impact of hydraulic overpressure on the pressurizing valve group.

[0019] Optionally, the pressure compensation valve group further includes a pressure compensation overflow valve, one end of the pressure compensation overflow valve is connected to the accumulator and the first pressure compensation throttle valve, and the other end is connected to the oil storage part.

[0020] By adopting the above technical solution, by setting the pressure compensation overflow valve, when the oil pressure output by the accumulator is relatively high, the pressure compensation overflow valve relieves the pressure, reducing the impact of the high oil pressure output by the accumulator on other components in the pressure compensation valve group.

[0021] Optionally, it further includes a second pressure compensation check valve. The liquid inlet end of the second pressure compensation check valve is connected to the liquid inlet end of the pressurizing valve group, the liquid outlet end of the second pressure compensation check valve is connected to the accumulator, and the liquid outlet end of the second overflow valve is also connected to the liquid inlet end of the oil circuit composed of the first pressure compensation throttle valve, the first pressure compensation check valve and the first pressure compensation solenoid valve.

[0022] By adopting the above technical solution, by setting the second pressure compensation check valve, the second pressure compensation check valve enables the oil output by the oil pump to be delivered to the pressure compensation valve group, while the oil output by the pressure compensation valve group cannot be delivered to the oil pump and the pressurizing valve group, reducing the risk of oil backflow.

[0023] Optionally, a locking pressure switch is connected to the pipeline between the accumulator and the second pressure compensation check valve, and the locking pressure switch is signal-connected to the accumulator.

[0024] By adopting the above technical solution, by setting the locking pressure switch, the locking pressure switch detects the pressure between the accumulator and the second pressure compensation check valve and feeds the detection signal back to the accumulator, thereby controlling the upper limit and lower limit of the output pressure of the accumulator.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By connecting the pressure boosting valve group, pressure relief valve group, and pressure compensation valve group in parallel, the integrated setting of the pressure boosting valve group, pressure relief valve group, and pressure compensation valve group is achieved, significantly reducing the volume of the control valve group of the hydraulic system and improving the problem of the large volume of the hydraulic system of the laminator. When the integrated valve block works, the oil pump supplies liquid to the integrated valve block. Part of the oil passes through the pressure boosting valve group and is delivered to the hydraulic cylinder through the pressure boosting valve group, realizing the preliminary pressure supply of the integrated valve block to the hydraulic cylinder. Part of the oil is delivered and stored in the pressure compensation valve group. After the pressure boosting valve group completes the pressure supply to the hydraulic cylinder, the pressure compensation valve group supplies liquid to the hydraulic cylinder for the second time until the preset hydraulic value is reached and maintained. When the hydraulic cylinder returns, the oil in the hydraulic cylinder is discharged through the pressure relief valve group.

[0027] 2. By setting up a buffer valve group, the buffer valve group can quickly supply oil to the hydraulic cylinder independently. At the same time, when the oil pump supplies liquid to the pressure boosting valve group and the buffer valve group, the first buffer solenoid valve detects the passing of the oil, closes the first buffer solenoid valve, and then controls the opening of the first pressure boosting solenoid valve to play a buffering role, reducing the risk of hydraulic pressure surging in the valve block during the initial oil supply of the valve block and causing damage to the hydraulic cylinder.

[0028] 3. By setting up a pressure stabilizing valve group, when the pressure compensation valve group supplies liquid to the hydraulic cylinder, it may cause the pressure in the hydraulic cylinder to exceed the preset value. Then the pressure stabilizing valve group discharges the oil in the hydraulic cylinder, making the hydraulic value in the hydraulic cylinder return to the preset range again, and keeping the output oil pressure of the integrated valve block to the hydraulic cylinder stable and moderate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0030] Description of the reference numerals: 1, pressure boosting valve group; 11, first pressure boosting solenoid valve; 12, first pressure boosting throttle valve; 13, first pressure boosting check valve; 2, pressure compensation valve group; 21, accumulator; 22, first pressure compensation throttle valve; 23, first pressure compensation check valve; 24, first pressure compensation solenoid valve; 3, pressure relief valve group; 31, first pressure relief solenoid valve; 32, first pressure relief throttle valve; 4, oil storage part; 5, buffer valve group; 51, first buffer solenoid valve; 52, first buffer check valve; 6, pressure stabilizing valve group; 61, first pressure stabilizing solenoid valve; 62, first pressure stabilizing throttle valve; 7, first pressure boosting overflow valve; 8, second pressure boosting overflow valve; 9, pressure compensation overflow valve; 10, second pressure compensation check valve; 14, locking pressure switch; 01, first connection point; 02, second connection point; 03, third connection point. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following is a further detailed description of the present application in conjunction with the attached Figure 1 to further elaborate on the present application.

[0032] The embodiment of the present application discloses an integrated valve block.

[0033] Reference Figure 1 Figure 1 , an integrated valve block includes a boosting valve group 1, a pressure - compensating valve group 2, and a pressure - relief valve group 3. The boosting valve group 1 and the pressure - compensating valve group 2 are connected in parallel. The end of the inlet port where they are connected in parallel is set as the first connection point 01, and the end of the outlet port where they are connected in parallel is set as the second connection point 02. The inlet end of the pressure - relief valve group 3 is connected to the second connection point 02.

[0034] When the integrated valve block works, the oil pump supplies liquid to the integrated valve block. Part of the oil passes through the boosting valve group 1 and is delivered to the hydraulic cylinder through the boosting valve group 1, realizing the preliminary pressure supply of the integrated valve block to the hydraulic cylinder. At the same time, another part of the oil is delivered and stored in the pressure - compensating valve group 2. After the boosting valve group 1 completes the pressure supply to the hydraulic cylinder, the pressure - compensating valve group 2 supplies liquid to the hydraulic cylinder for the second time until the preset hydraulic value is reached and maintained. When the hydraulic cylinder returns, the oil in the hydraulic cylinder is discharged through the pressure - relief valve group 3.

[0035] By connecting the boosting valve group 1, the pressure - relief valve group 3, and the pressure - compensating valve group 2 in parallel, the integrated setting of the boosting valve group 1, the pressure - relief valve group 3, and the pressure - compensating valve group 2 is realized, significantly reducing the volume of the control valve group of the hydraulic system and improving the problem of the large volume of the hydraulic system of the laminator.

[0036] The boosting valve group 1 includes a first boosting solenoid valve 11, a first boosting throttle valve 12, and a first boosting check valve 13 connected in series in sequence. The inlet end of the first boosting solenoid valve 11 is connected to the first connection point 01 through a pipeline, and the outlet end of the first boosting check valve 13 is connected to the second connection point 02 through a pipeline.

[0037] A buffer valve group 5 is also connected in parallel on one side of the boosting valve group 1. The buffer valve group 5 includes a first buffer solenoid valve 51 and a first buffer check valve 52 connected in series in sequence. The inlet end of the first buffer solenoid valve 51 is connected to the first connection point 01 through a pipeline, and the outlet end of the first buffer check valve 52 is connected to the second connection point 02 through a pipeline. The first buffer solenoid valve 51 is provided with a sensor and is electrically connected to the first boosting solenoid valve 11.

[0038] One working mode of the buffer valve group 5 is as follows: When the oil pump supplies pressure oil to the hydraulic cylinder through the integrated valve block, the oil is pumped by the oil pump to the first connection point 01, then passes through the first buffer solenoid valve 51, the first buffer check valve 52, and the second connection point 02 in sequence, and finally the oil is delivered to the hydraulic cylinder. The buffer valve group 5 in this working mode can enable the oil pump to quickly supply oil to the hydraulic cylinder, and the first buffer check valve 52 effectively prevents the oil from flowing back in the pipeline of the buffer valve group 5.

[0039] Another working mode of the buffer valve group 5 is as follows: When the oil pump conveys pressurized oil to the hydraulic cylinder through the integrated valve block, the oil is pumped by the oil pump to the first connection point 01 and then conveyed to the position of the first buffer solenoid valve 51. The sensor on the first buffer solenoid valve 51 senses the passing of the oil, then controls the first buffer solenoid valve 51 to close, and controls the first boosting solenoid valve 11 to open. The oil passes through the first boosting solenoid valve 11, the first boosting throttle valve 12, the first boosting check valve 13 and the second connection point 02 in sequence, and finally is conveyed into the hydraulic cylinder.

[0040] The buffer valve group 5 in this working mode plays a buffering role, reducing the risk of hydraulic shock in the valve block when the oil pump initially supplies oil to the integrated valve block, which may cause damage to the hydraulic cylinder. The boosting valve group 1 realizes the control of the oil delivery from the oil pump to the hydraulic cylinder, and the first boosting throttle valve 12 in the boosting valve group 1 realizes the adjustment of the oil flow rate in the pipeline of the boosting valve group 1. The first boosting check valve 13 effectively prevents the oil from flowing back in the pipeline of the buffer valve group 5.

[0041] A first boosting overflow valve 7 is also connected by a pipeline at the first connection point 01. The inlet end of the first boosting overflow valve 7 is connected to the second connection point 02 by a pipeline, and the outlet end is connected to an oil storage part 4 by a pipeline. The oil storage part 4 is an oil barrel.

[0042] When the oil pump pumps oil to the hydraulic cylinder through the boosting valve group 1, the boosting valve group 1 may get out of control, resulting in the pressure in the system pipeline seriously exceeding the preset pressure value of the system. When the pressure exceeds the preset pressure value of the first boosting overflow valve 7, the first boosting overflow valve 7 opens to discharge part of the oil in the system, realizing the pressure relief of the system and reducing the impact of system overpressure on the hydraulic cylinder during the boosting process of the oil pump through the boosting valve group 1.

[0043] A second boosting overflow valve 8 is also connected by a pipeline at the first connection point 01. The inlet end of the second boosting overflow valve 8 is connected to the first connection point 01 by a pipeline, and the outlet end is connected to the oil storage part 4 by a pipeline.

[0044] When the oil pump supplies liquid to the boosting valve group 1 and the pressure compensation valve group 2, the initial output pressure of the oil pump will be relatively high. When the pipeline between the oil pump and the boosting valve group 1 and the pressure compensation valve group 2 is overpressured, the second boosting valve discharges the oil between the oil pump and the boosting valve group 1, reducing the impact of hydraulic overpressure on the boosting valve group 1 and the pressure compensation valve group 2.

[0045] The pressure compensation valve group 2 includes an accumulator 21, a first pressure compensation throttle valve 22, a first pressure compensation check valve 23 and a first pressure compensation solenoid valve 24 connected in series in sequence, and also includes a second pressure compensation check valve 10, a pressure compensation overflow valve 9 and a locking pressure switch 14. The outlet end of the first pressure compensation solenoid valve 24 is connected to the second connection point 02 through a pipeline.

[0046] The pipeline connection node between the accumulator 21 and the first pressure - compensating throttle valve 22 is set as the third connection point 03, and the third connection point 03 is connected to both the accumulator 21 and the first pressure - compensating throttle valve 22. The liquid inlet end of the second pressure - compensating check valve 10 is connected to the first connection point 01 through a pipeline, and the liquid outlet end is connected to the third connection point 03 through a pipeline. That is, the series - connected path composed of the second pressure - compensating check valve 10, the first pressure - compensating throttle valve 22, the first pressure - compensating check valve 23, and the first pressure - compensating solenoid valve 24 is connected in parallel with the boosting valve group 1.

[0047] When the oil pump supplies liquid to the integrated valve block, part of the oil passes through the second pressure - compensating check valve 10 and enters and is stored in the accumulator 21. After the boosting valve group 1 completes the boosting of the hydraulic cylinder, the accumulator 21 discharges the oil stored in itself. Under the limiting action of the second pressure - compensating check valve 10, the oil passes through the first pressure - compensating throttle valve 22, the first pressure - compensating check valve 23, and the first pressure - compensating solenoid valve 24 in sequence and is delivered to the hydraulic cylinder. During this process, the second pressure - compensating check valve 10 enables the oil output by the oil pump to be delivered to the pressure - compensating valve group 2, while the oil output by the pressure - compensating valve group 2 cannot be delivered to the oil pump and the boosting valve group 1, reducing the risk of oil backflow.

[0048] The liquid inlet end of the pressure - compensating overflow valve 9 is connected to the third connection point 03, and the liquid outlet end is connected to the oil storage part 4. When the oil pressure output by the accumulator 21 is relatively high, the pressure - compensating overflow valve 9 relieves the pressure of the oil, reducing the impact of the high oil pressure output by the accumulator 21 on other components in the pressure - compensating valve group 2.

[0049] The locking pressure switch 14 is connected to the third connection point 03 through a pipeline and controls the accumulator 21 through signal sensing. The locking pressure switch 14 detects the pressure between the accumulator 21 and the second pressure - compensating check valve 10 and feeds the detection signal back to the accumulator 21, thereby controlling the upper limit and lower limit of the output pressure of the accumulator 21.

[0050] A voltage - stabilizing valve group 6 is also connected to the second connection point 02 through a pipeline. The voltage - stabilizing valve group 6 includes a first voltage - stabilizing throttle valve 62 and a first voltage - stabilizing solenoid valve 61 connected in series in sequence. The liquid inlet end of the first voltage - stabilizing throttle valve 62 is connected to the second connection point 02 through a pipeline, and the liquid outlet end of the first voltage - stabilizing solenoid valve 61 is connected to the oil storage part 4.

[0051] When the pressure - compensating valve group 2 supplies liquid to the hydraulic cylinder, it may cause the pressure in the hydraulic cylinder to exceed the preset value. Then the voltage - stabilizing valve group 6 discharges the oil in the hydraulic cylinder, making the hydraulic value in the hydraulic cylinder return to the preset range again. When the pressure of the hydraulic cylinder is lower than the preset value, the pressure - compensating valve group 2 replenishes the pressure of the hydraulic cylinder again. The pressure - compensating valve group 2 and the voltage - stabilizing valve group 6 work together to keep the output oil pressure from the integrated valve block to the hydraulic cylinder stable and moderate.

[0052] The pressure relief valve group 3 includes a first pressure relief throttle valve 32 and a first pressure relief solenoid valve 31 which are connected in series in sequence. The liquid inlet end of the first pressure relief throttle valve 32 is connected to the second connection point 02 through a pipeline, and the liquid outlet end of the second pressure relief solenoid valve is connected to the oil storage part 4 through a pipeline.

[0053] When the hydraulic cylinder returns, the hydraulic oil in the hydraulic cylinder is discharged into the oil storage member 4 through the first pressure relief throttle valve 32 and the first pressure relief solenoid valve 31 in sequence, thereby achieving pressure relief of the hydraulic system.

[0054] The implementation principle of an integrated valve block in the embodiment of the present application is as follows: when the integrated valve block is working, the oil pump supplies fluid to the integrated valve block, part of the fluid passes through the boosting valve group 1, and is delivered to the hydraulic cylinder through the boosting valve group 1, so as to realize the initial pressure supply of the integrated valve block to the hydraulic cylinder; part of the fluid is delivered and stored in the pressure-boosting valve group 2, and after the boosting valve group 1 completes the pressure supply to the hydraulic cylinder, the pressure-boosting valve group 2 supplies fluid to the hydraulic cylinder for the second time until the preset hydraulic pressure value is reached. During the pressure-boosting process of the pressure-boosting valve group 2, the pressure in the hydraulic cylinder may exceed the preset value, and the pressure-stabilizing valve group 6 discharges the fluid in the hydraulic cylinder, so that the hydraulic pressure value in the hydraulic cylinder returns to the preset range. When the pressure of the hydraulic cylinder is lower than the preset value, the pressure-boosting valve group 2 replenishes the pressure to the hydraulic cylinder again, and the pressure-boosting valve group 2 and the pressure-stabilizing valve group 6 work together to keep the output oil pressure of the integrated valve block to the hydraulic cylinder stable and moderate. Finally, the oil in the hydraulic cylinder is discharged through the pressure relief valve group 3, and the integrated valve block completes the pressure-boosting, pressure-stabilizing, pressure-maintaining and pressure-relieving control of the hydraulic system.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An integrated valve block, characterized in that: including a booster valve group (1), with one end connected to an oil pump and the other end connected to a hydraulic cylinder, including a first booster solenoid valve (11), a first booster throttle valve (12), and a first booster check valve (13) connected in series; a pressure compensation valve group (2), including an accumulator (21), a first pressure compensation throttle valve (22), a first pressure compensation check valve (23), and a first pressure compensation solenoid valve (24) connected in series. The oil circuit formed by the first pressure compensation throttle valve (22), the first pressure compensation check valve (23), and the first pressure compensation solenoid valve (24) is connected in parallel with the booster valve group (1), and the accumulator (21) is also connected to the oil pump; a pressure relief valve group (3), connected in parallel with the booster valve group (1), including a first pressure relief solenoid valve (31) and a first pressure relief throttle valve (32) connected in series. The outlet end of the pressure relief valve group (3) is connected to an oil storage component (4); further including a buffer valve group (5), the buffer valve group (5) is connected in parallel with the booster valve group (1), the buffer valve group (5) includes a first buffer solenoid valve (51) and a first buffer check valve (52), and the first buffer solenoid valve (51) is signal-connected to the first booster solenoid valve (11); further including a voltage stabilizing valve group (6), the voltage stabilizing valve group (6) is connected in parallel with the pressure relief valve group (3), the voltage stabilizing valve group (6) includes a first voltage stabilizing solenoid valve (61) and a first voltage stabilizing throttle valve (62).

2. An integrated valve block according to claim 1, characterized in that: further including a first booster overflow valve (7), the pressure end of the first booster overflow valve (7) is connected to the outlet end of the booster valve group (1), and the other end is connected to the oil storage component (4).

3. An integrated valve block according to claim 1, characterized in that: further including a second booster overflow valve (8), the pressure end of the second booster overflow valve (8) is connected to the oil pump and the inlet end of the booster valve group (1).

4. An integrated valve block according to claim 1, characterized in that: The pressure compensation valve group (2) further includes a pressure compensation overflow valve (9), one end of the pressure compensation overflow valve (9) is connected to the accumulator (21) and the first pressure compensation throttle valve (22), and the other end is connected to the oil storage component (4).

5. An integrated valve block according to claim 1, characterized in that: further including a second pressure compensation check valve (10), the inlet end of the second pressure compensation check valve (10) is connected to the inlet end of the booster valve group (1), the outlet end of the second pressure compensation check valve (10) is connected to the accumulator (21), and the outlet end of the second pressure compensation check valve (10) is also connected to the inlet end of the oil circuit formed by the first pressure compensation throttle valve (22), the first pressure compensation check valve (23), and the first pressure compensation solenoid valve (24).

6. An integrated valve block according to claim 5, characterized in that: A locking pressure switch (14) is connected to the pipeline between the accumulator (21) and the second pressure compensation check valve (10), and the locking pressure switch (14) is signal-connected to the accumulator (21).

Images