A valve group applied to an overflow valve durability test platform

Abstract

A valve group applied to an overflow valve durability test platform, which relates to the field of hydraulic control systems. The present invention solves the problems of the existing overflow valve durability test system that it is impossible to conduct durability tests on multiple overflow valves simultaneously, with high labor costs and low test efficiency. The oil inlet pipe joint of the present invention is connected to the oil inlets of four electromagnetic directional control valves through the internal oil circuit of the valve body. The oil outlets of the four electromagnetic directional control valves are respectively connected to the oil inlets of four throttle valves. The oil outlets of the four throttle valves are connected to one oil outlet pipe joint on the front side of the valve body and the oil inlets of three overflow valves to be tested through the internal oil circuit of the valve body. The oil outlets of the three overflow valves to be tested are respectively connected to two oil outlet pipe joints on the left side of the valve body and one oil outlet pipe joint on the right side of the valve body through the internal oil circuit of the valve body. The four oil outlet pipe joints are respectively connected to an external oil return tank through oil circuits. The present invention is used to conduct durability tests on multiple overflow valves simultaneously.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic control systems, in particular to a valve group based on a durability test platform for low-pressure and large-flow overflow valves, and specifically to a valve group applied to an overflow valve durability test platform. Background Art

[0002] During the development of a hydraulic product, the physical test of the product is often the last link of the design. Therefore, the quality of the physical test results plays a decisive role in evaluating the performance of the product, directly related to the success or failure of the design. In the experiment of conducting the durability test of the overflow valve, in order to conduct the durability test on multiple overflow valves more efficiently, at this time, it is required that the test platform can conduct the durability test on multiple overflow valves simultaneously to improve the efficiency.

[0003] The traditional durability test of the overflow valve is often carried out on a single overflow valve. Although the system built by this method has a relatively simple structure, in the face of the durability test of multiple overflow valves, each needs to be tested separately, which takes a long time and affects the test efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the existing overflow valve durability test system, such as being unable to conduct the durability test on multiple overflow valves simultaneously, resulting in long time consumption, high labor cost, and low test efficiency, and then to provide a valve group applied to an overflow valve durability test platform.

[0005] The technical solution of the present invention is as follows:

[0006] A valve group applied to an overflow valve durability test platform, which includes a valve body 3, an oil inlet pipe joint 2, N overflow valves to be tested 4, N + 1 oil outlet pipe joints, N + 1 electromagnetic directional control valves 1, N + 1 switch sockets 5 and N + 1 throttle valves 6, where N ≥ 2 and N is a positive integer; the valve body 3 is a cuboid-shaped valve body. Along the length direction on the top end face of the valve body 3, N + 1 throttle valves 6 are installed in sequence from left to right. On the top end faces of the N + 1 throttle valves 6, N + 1 electromagnetic directional control valves 1 are respectively installed. On the N + 1 electromagnetic directional control valves 1, N + 1 switch sockets 5 are respectively installed. Along the length direction on the front side end face of the valve body 3, an oil outlet pipe joint and N overflow valves to be tested 4 are installed in sequence from left to right. On the left side end face of the valve body 3, two oil outlet pipe joints are installed. On the right side end face of the valve body 3, an oil inlet pipe joint 2 and an oil outlet pipe joint are respectively installed. The oil inlet pipe joint 2 is connected to an external screw pump group for oil circuit connection. The oil inlet pipe joint 2 is respectively connected to the oil inlets of the N + 1 electromagnetic directional control valves 1 through the internal oil circuit of the valve body 3. The oil outlets of the N + 1 electromagnetic directional control valves 1 are respectively connected to the oil inlets of the N + 1 throttle valves 6. The oil outlets of the N + 1 throttle valves 6 are respectively connected to an oil outlet pipe joint and the oil inlets of the N overflow valves to be tested 4 installed on the front side end face of the valve body 3 through the internal oil circuit of the valve body 3. The oil outlets of the N overflow valves to be tested 4 are respectively connected to the two oil outlet pipe joints on the left side end face of the valve body 3 and an oil outlet pipe joint on the right side end face of the valve body 3 through the internal oil circuit of the valve body 3. The N + 1 oil outlet pipe joints are respectively connected to an external oil return tank for oil circuit connection.

[0007] Further, the number of the overflow valves to be tested 4 is three.

[0008] Further, the number of the oil outlet pipe joints, the electromagnetic directional control valves 1, the switch sockets 5 and the throttle valves 6 is four each.

[0009] Further, four internal oil circuits for connecting the oil inlet pipe joint 2 and the four throttle valves 6 are machined inside the valve body 3.

[0010] Further, three internal oil circuits for connecting the three overflow valves to be tested 4 and the corresponding three throttle valves 6 are machined inside the valve body 3.

[0011] Further, four internal oil circuits for connecting the oil outlet pipe joints with the three overflow valves to be tested 4 and the throttle valves 6 not connected to the overflow valves to be tested 4 are machined inside the valve body 3.

[0012] Further, it further includes four pressure measurement joints and four oil pressure sensors. Along the length direction on the rear side end face of the valve body 3, four pressure measurement joints are installed in sequence from left to right. On the four pressure measurement joints, four oil pressure sensors are respectively installed. The four pressure measurement joints are respectively connected to the oil circuits of the four electromagnetic directional control valves 1.

[0013] Furthermore, the valve body 3 is threadedly connected to each overflow valve 4 to be measured.

[0014] Furthermore, the valve body 3 is fixedly connected to the oil outlet pipe joint by bolts 7.

[0015] Furthermore, the valve body 3 is fixedly connected to the oil inlet pipe joint 2 by bolts 7.

[0016] The present invention has the following effects compared with the prior art:

[0017] 1. The valve group applied to the overflow valve durability test platform of the present invention can simultaneously perform durability tests on multiple overflow valves, improving efficiency and reducing costs. By the energization and de-energization of the electromagnetic directional valve 1, the conduction of each oil circuit is controlled, so that the overflow valves 4 to be measured are alternately depressurized and pressurized in turn, overcoming the problem that the durability test of multiple objects to be measured in the past took too long, improving the reliable redundancy of the system, ensuring the safety and accuracy of the durability test, and improving the test efficiency of the system.

[0018] 2. The electromagnetic directional valve 1 of the present invention alternately operates in sequence according to whether the switch socket 5 is energized, so that each oil circuit is alternately conducted, so that the overflow valves 4 to be measured alternately work. Since 300,000 test times are required, the electromagnetic directional valve 1 needs to meet this performance, and the electromagnetic directional valve 1 needs to have large flow capacity, small pressure loss, fast response, strong oil pollution resistance and other performances. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the valve group applied to the overflow valve durability test platform of the present invention.

[0020] In the figure: 1 - electromagnetic directional valve; 2 - pipe joint; 3 - valve body; 4 - overflow valve to be measured; 5 - switch socket; 6 - throttle valve; 7 - bolt. DETAILED DESCRIPTION OF THE INVENTION

[0021] Detailed Embodiment 1: In combination with Figure 1Description of this embodiment: A valve group applied to an overflow valve durability test platform according to this embodiment includes a valve body 3, an oil inlet pipe joint 2, N overflow valves to be tested 4, N + 1 oil outlet pipe joints, N + 1 electromagnetic directional control valves 1, N + 1 switch sockets 5, and N + 1 throttle valves 6, where N ≥ 2 and N is a positive integer; the valve body 3 is a cuboid-shaped valve body. Along the length direction on the top end face of the valve body 3, N + 1 throttle valves 6 are installed in sequence from left to right. On the top end faces of the N + 1 throttle valves 6, N + 1 electromagnetic directional control valves 1 are respectively installed. On the N + 1 electromagnetic directional control valves 1, N + 1 switch sockets 5 are respectively installed. On the front side end face of the valve body 3, an oil outlet pipe joint and N overflow valves to be tested 4 are installed in sequence from left to right. On the left side end face of the valve body 3, two oil outlet pipe joints are installed. On the right side end face of the valve body 3, an oil inlet pipe joint 2 and an oil outlet pipe joint are respectively installed. The oil inlet pipe joint 2 is connected to an external screw pump group for oil circuit connection. The oil inlet pipe joint 2 is respectively connected to the oil inlet ports of the N + 1 electromagnetic directional control valves 1 through the internal oil circuit of the valve body 3. The oil outlet ports of the N + 1 electromagnetic directional control valves 1 are respectively connected to the oil inlet ports of the N + 1 throttle valves 6. The oil outlet ports of the N + 1 throttle valves 6 are respectively connected to an oil outlet pipe joint installed on the front side end face of the valve body 3 and the oil inlet ports of the N overflow valves to be tested 4 through the internal oil circuit of the valve body 3. The oil outlet ports of the N overflow valves to be tested 4 are respectively connected to the two oil outlet pipe joints on the left side end face of the valve body 3 and an oil outlet pipe joint on the right side end face of the valve body 3 through the internal oil circuit of the valve body 3. The N + 1 oil outlet pipe joints are respectively connected to an external oil return tank for oil circuit connection.

[0022] Specific embodiment two: Combining Figure 1 Description of this embodiment: The number of the overflow valves to be tested 4 in this embodiment is three. With such a setting, the overflow valves to be tested 4 are connected to the oil circuits of the electromagnetic directional control valves 1 respectively, and durability tests are carried out through the energization and de-energization of the electromagnetic directional control valves 1. The number of the overflow valves to be tested 4 is one less than that of the electromagnetic directional control valves 1. When it is desired to stop the test on the overflow valve to be tested 4 first, the oil circuit can be made to pass through the first electromagnetic directional control valve on the left, so that the oil directly returns to the oil tank. Other compositions and connection relationships are the same as those in specific embodiment one.

[0023] Specific embodiment three: Combining Figure 1 Description of this embodiment: The number of the oil outlet pipe joints, electromagnetic directional control valves 1, switch sockets 5, and throttle valves 6 in this embodiment is four. Other compositions and connection relationships are the same as those in specific embodiment one or two.

[0024] Specific embodiment four: Combining Figure 1 Description of this embodiment: Four internal oil circuits for connecting the oil inlet pipe joint 2 and the four throttle valves 6 are machined inside the valve body 3 in this embodiment. Other compositions and connection relationships are the same as those in specific embodiments one, two, or three.

[0025] Embodiment 5: Combined with Figure 1 To describe this embodiment, three internal oil passages are machined inside the valve body 3 for connecting three connected measured overflow valves 4 and the corresponding three throttle valves 6. With such a setting, the throttle valve 6 is used to control the flow rate to ensure the safety of the measured overflow valve 4. Since there are requirements for the flow rate of the measured overflow valve 4, the throttle valve 6 changes the flow rate by controlling the throttle section. The other components and connection relationships are the same as those in Embodiment 1, 2, 3 or 4.

[0026] Embodiment 6: Combined with Figure 1 To describe this embodiment, four internal oil passages are machined inside the valve body 3 for connecting the oil outlet pipe joint with three measured overflow valves 4 and the throttle valves 6 not connected to the measured overflow valves 4. The other components and connection relationships are the same as those in Embodiment 1, 2, 3, 4 or 5.

[0027] Embodiment 7: Combined with Figure 1 To describe this embodiment, this embodiment further includes four pressure measurement joints and four oil pressure sensors. Four pressure measurement joints are sequentially installed on the rear end face of the valve body 3 from left to right along the length direction. Four oil pressure sensors are respectively installed on the four pressure measurement joints, and the four pressure measurement joints are respectively connected to the oil passages of the four electromagnetic directional control valves 1. With such a setting, the pressure measurement joints are used to measure the oil passage pressure to ensure that the pressure in the oil passage can enable the overflow valve to work. The other components and connection relationships are the same as those in Embodiment 1, 2, 3, 4, 5 or 6.

[0028] Embodiment 8: Combined with Figure 1 To describe this embodiment, the valve body 3 and each measured overflow valve 4 are connected by threads. The other components and connection relationships are the same as those in Embodiment 1, 2, 3, 4, 5, 6 or 7.

[0029] Embodiment 9: Combined with Figure 1 To describe this embodiment, the valve body 3 and the oil outlet pipe joint are fixedly connected by bolts 7. With such a setting, the oil outlet pipe joint is used to make the valve body 3 communicate with the flow. The oil outlet pipe joint is connected to the valve body 3 by bolts 7 as the entire integrated valve block. The other components and connection relationships are the same as those in Embodiment 1, 2, 3, 4, 5, 6, 7 or 8.

[0030] Embodiment 10: Combined with Figure 1To describe this embodiment, the valve body 3 of this embodiment is fixedly connected to the oil inlet pipe joint 2 by bolts 7. With such a setting, the oil inlet pipe joint 2 is used to make the valve body 3 communicate with the flow. The oil inlet pipe joint 2 is connected to the valve body 3 by bolts 7 to form the entire integrated valve block. The other components and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth, seventh, eighth, or ninth specific embodiments.

[0031] Working principle

[0032] Combined with Figure 1 To describe the working principle of a valve group applied to an overflow valve durability test platform of the present invention: The electromagnetic directional valve 1 alternately operates in sequence according to whether the switch socket 5 is powered on, so that each oil circuit is alternately conducted, thereby enabling the measured overflow valve 4 to work alternately. By starting and stopping each electromagnetic directional valve 1, the overflow valve 4 to be measured connected thereto operates and closes.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve group applied to an overflow valve durability test platform, characterized in that: It includes a valve body (3), an oil inlet pipe joint (2), N measured overflow valves (4), N + 1 oil outlet pipe joints, N + 1 electromagnetic reversing valves (1), N + 1 switch sockets (5) and N + 1 throttle valves (6), where N≥2 and N is a positive integer; the valve body (3) is a cuboid-shaped valve body. Along the length direction on the top end face of the valve body (3), N + 1 throttle valves (6) are installed in sequence from left to right. On the top end faces of the N + 1 throttle valves (6), N + 1 electromagnetic reversing valves (1) are respectively installed. On the N + 1 electromagnetic reversing valves (1), N + 1 switch sockets (5) are respectively installed. On the front side end face of the valve body (3), an oil outlet pipe joint and N measured overflow valves (4) are installed in sequence from left to right along the length direction. On the left side end face of the valve body (3), two oil outlet pipe joints are installed. On the right side end face of the valve body (3), an oil inlet pipe joint (2) and an oil outlet pipe joint are respectively installed. The oil inlet pipe joint (2) is connected to the external screw pump group for oil circuit connection. The oil inlet pipe joint (2) is respectively connected to the oil inlets of the N + 1 electromagnetic reversing valves (1) through the internal oil circuit of the valve body (3). The oil outlets of the N + 1 electromagnetic reversing valves (1) are respectively connected to the oil inlets of the N + 1 throttle valves (6). The oil outlets of the N + 1 throttle valves (6) are respectively connected to an oil outlet pipe joint installed on the front side end face of the valve body (3) and the oil inlets of the N measured overflow valves (4) through the internal oil circuit of the valve body (3). The oil outlets of the N measured overflow valves (4) are respectively connected to the two oil outlet pipe joints on the left side end face of the valve body (3) and an oil outlet pipe joint on the right side end face of the valve body (3) through the internal oil circuit of the valve body (3). The N + 1 oil outlet pipe joints are respectively connected to the external oil return tank for oil circuit connection.

2. The valve group applied to the durability test platform of the overflow valve according to claim 1, characterized in that: The number of the measured overflow valves (4) is three.

3. The valve group applied to the durability test platform of the overflow valve according to claim 1, characterized in that: The numbers of the oil outlet pipe joints, the electromagnetic reversing valves (1), the switch sockets (5) and the throttle valves (6) are all four.

4. A valve group applied to an overflow valve durability test platform according to claim 3, characterized in that: Four internal oil circuits for connecting the oil inlet pipe joint (2) and the four throttle valves (6) are machined inside the valve body (3).

5. A valve group applied to an overflow valve durability test platform according to claim 2, 3 or 4, characterized in that: Three internal oil circuits for connecting the three measured overflow valves (4) and the corresponding three throttle valves (6) are machined inside the valve body (3).

6. The valve group applied to the durability test platform of the overflow valve according to claim 5, characterized in that: Four internal oil circuits for connecting the oil outlet pipe joints, the three measured overflow valves (4) and the throttle valves (6) not connected to the measured overflow valves (4) are machined inside the valve body (3).

7. The valve group applied to the durability test platform of the overflow valve according to claim 6, characterized in that: It also includes four pressure measuring joints and four oil pressure sensors. Along the length direction on the rear side end face of the valve body (3), four pressure measuring joints are installed in sequence from left to right. On the four pressure measuring joints, four oil pressure sensors are respectively installed. The four pressure measuring joints are respectively connected to the oil circuits of the four electromagnetic reversing valves (1).

8. A valve group applied to an overflow valve durability test platform according to claim 1 or 7, characterized in that: The valve body (3) is threadedly connected to each measured overflow valve (4).

9. A valve group applied to an overflow valve durability test platform according to claim 8, characterized in that: The valve body (3) is fixedly connected to the oil outlet pipe joint through a bolt (7).

10. The valve group applied to the durability test platform of the overflow valve according to claim 9, wherein: The valve body (3) is fixedly connected to the oil inlet pipe joint (2) through a bolt (7).

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