Extension structure and method of hydraulic cylinder leakage detection device

Abstract

This invention relates to the field of hydraulic system oil leakage detection, specifically to an extended structure and method for a hydraulic cylinder leakage detection device. It can connect multiple cylinders under test simultaneously, thus eliminating the hassle of repeated disassembly and reassembly when testing multi-cylinder systems, making the testing process more convenient and economical. The use of solenoid valves enables automated control of valve group switching. By integrating each solenoid valve in the valve group into the automated control system, the function of automatically switching the tested cylinder can be achieved, thereby making the testing process in multi-cylinder environments faster.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system oil leakage detection, and specifically to an extended structure and method for a hydraulic cylinder leakage detection device. Background Technology

[0002] A hydraulic system consists of five parts: power components, control components, auxiliary components, actuators, and hydraulic oil. Hydraulic oil, as the energy transfer medium, first converts mechanical energy into pressure energy through a hydraulic pump, then drives actuators such as hydraulic cylinders and hydraulic motors, thus realizing the conversion of pressure energy into mechanical energy. In a hydraulic system, P is the inlet, T is the return port, and A and B are the inlet or return ports of the hydraulic actuator (hydraulic cylinder). The cylinder under test has two chambers; the chamber containing the piston rod is called the rod chamber, and the chamber without the piston rod is called the plug chamber. The cylinder under test is labeled with the capital letter M, and so on, with the first cylinder under test being M1, the second cylinder under test being M2, and so on.

[0003] The hydraulic cylinder leakage detection device is located between the hydraulic oil supply circuit and the cylinder under test, with four interfaces: P, T, A, and B. While it can detect internal and external leaks in a single cylinder, detecting and diagnosing leaks in two or more cylinders requires repeated installation and removal, which is very inconvenient. Summary of the Invention

[0004] To address the above technical issues, a structure and method are provided that allows for leak detection and diagnosis of multiple hydraulic cylinders without repeated disassembly and reassembly. The technical solution is as follows: An extended structure for a hydraulic cylinder leakage detection device, An expansion interface station for a hydraulic cylinder leakage detection device, used to connect the hydraulic cylinder leakage detection device to multiple cylinders under test; The switching valve group is used to control whether the tested cylinder is in the detection state.

[0005] Furthermore, the extended interface station has four extended oil ports, and each extended oil line has a plurality of docking points; one docking point is taken from each extended oil line to form a docking unit, and each of the switching valve groups has eight interfaces and six shut-off components.

[0006] Furthermore, the docking unit includes a first docking unit, which includes four docking points: P1, T1, A1, and B1. The switching valve group includes a first switching valve group and a second switching valve group. The first switching valve group has eight interfaces: a1, b1, p1, t1, c1, d1, x1, and y1. The first switching valve group has six shut-off elements: Va1, Vb1, Vp1, Vt1, Vc1, and Vd1. The x1 interface is divided into a first branch and a second branch. The first branch connects to the interface p1 via the cutoff element Vp1 and is connected to the docking point P1. The second branch connects to the interface c1 via the cutoff element Vc1, and the interface c1 is connected to the piston cavity of the tested cylinder. The docking point A1 connects to the interface c1 via the interface a1 and the cutoff element Va1. The y1 interface is divided into a third branch and a fourth branch. The third branch connects to the interface t1 via the cutoff element Vt1 and is connected to the docking point T1. The fourth branch connects to the interface d1 via the cutoff element Vd1, and the interface d1 is connected to the rod cavity of the tested cylinder. The docking point B1 connects to the interface d1 via the interface b1 and the cutoff element Vb1.

[0007] Furthermore, the docking unit includes a plurality of docking units with the same structure as the first docking unit.

[0008] Furthermore, the shut-off element is a shut-off valve and / or a solenoid directional valve.

[0009] An extended method for a hydraulic cylinder leakage detection device is disclosed. The second switching valve group has six shut-off components: Va2, Vb2, Vp2, Vt2, Vc2, and Vd2, corresponding to the second cylinder under test. The switching process is divided into three states. State 1: When the first and second tested cylinders are working normally, Vc1 and Vd1 are open, Va1, Vb1, Vp1, and Vt1 are closed; Vc2 and Vd2 are open, and Va2, Vb2, Vp2, and Vt2 are closed. State 2: When testing the first cylinder under test, Va1, Vb1, Vp1, and Vt1 are open; Vc1 and Vd1 are closed; Va2, Vb2, Vp2, Vt2, Vc2, and Vd2 are closed. State 3: When testing the second cylinder under test, Va1, Vb1, Vp1, Vt1, Vc1, and Vd1 are closed; Va2, Vb2, Vp2, and Vt2 are open; and Vc2 and Vd2 are closed.

[0010] It can connect multiple hydraulic cylinders under test at the same time, thus eliminating the trouble of repeated disassembly and installation when testing multi-cylinder systems, making the testing process more convenient and economical.

[0011] Using solenoid valves enables automated control of valve group switching. By integrating each solenoid valve in the valve group into the automated control system, the function of automatically switching the tested cylinder can be realized, thus making the testing process in a multi-cylinder environment faster. Attached Figure Description

[0012] Figure 1 Schematic diagram of the extended structure of the hydraulic cylinder leakage detection device; Figure 2 Timing diagram of the valve group for switching the state of the two tested hydraulic cylinders; Figure 3 This is a schematic diagram of the extended structure of the hydraulic cylinder leakage detection device in Example 2; Reference numerals: 1. Expansion interface station; 2. First switching valve group; 3. Second switching valve group. Implementation

[0013] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Va1, Vb1, Vp1, Vt1, Vc1, Vd1; Va2, Vb2, Vp2, Vt2, Vc2, Vd2, a1,b1,p1,t1,c1,d1,x1,y1 in this application are merely markings for ease of understanding and are not intended to specifically limit the structure and connection relationships. Example 1

[0014] Combination Figure 1 The technical solution of this embodiment presents an extended structure of a hydraulic cylinder leakage detection device. The extended interface station 1 of the hydraulic cylinder leakage detection module is used to connect multiple tested cylinders to the hydraulic cylinder leakage detection device; the switching valve group is used to control whether the tested cylinder is in the detection state.

[0015] The extended interface station 1 has four extended oil ports, corresponding to the A, B, P, and T ports of the hydraulic cylinder leakage detection device. Each extended oil line has multiple docking points. One docking point is taken from each extended oil line to form a docking unit. Each switching valve group has eight interfaces and six shut-off components.

[0016] The docking unit includes a first docking unit, which has four docking points: P1, T1, A1, and B1. The switching valve group includes a first switching valve group 2 and a second switching valve group 3. The first switching valve group 2 has eight interfaces: a1, b1, p1, t1, c1, and d1. x1, y1, and the six shut-off elements Va1, Vb1, Vp1, Vt1, Vc1, and Vd1 of the first switching valve group 2; wherein the x1 interface is divided into a first branch and a second branch, the first branch passing through the shut-off element Vp1 to interface p1 and connecting with the docking point P1; the second branch passing through the shut-off element Vc1 to interface c1, interface c1 connecting with the piston cavity of the tested cylinder; docking point A1 passing through interface a1 to the shut-off element Va1 and then connecting to interface c1; the y1 interface is divided into a third branch and a fourth branch, the third branch passing through the shut-off element Vt1 to interface t1 and connecting with the docking point T1; the fourth branch passing through the shut-off element Vd1 to interface d1, interface d1 connecting with the rod cavity of the tested cylinder; docking point B1 passing through interface b1 to the shut-off element Vb1 and then connecting to interface d1. The docking unit includes a plurality of docking units with the same structure as the first docking unit. The shut-off elements are shut-off valves.

[0017] Figure 1 As shown, this demonstrates how, in the case of two tested hydraulic cylinders, the combination of a hydraulic cylinder leakage detection module expansion interface station and a switching valve group can be used to detect the two cylinders separately. Example 2

[0018] refer to Figure 3 The cut-off element is an electromagnetic directional valve. This embodiment can realize the automated control of switching valve groups. By integrating each electromagnetic valve of the valve group into the automated control system, the function of automatically switching the tested oil cylinder can be realized, thereby making the detection process in a multi-cylinder environment faster. Example 3

[0019] refer to Figure 2 This embodiment provides an extended method for a hydraulic cylinder leakage detection device. The six shut-off components of the second switching valve group 3 are Va2, Vb2, Vp2, Vt2, Vc2, and Vd2, corresponding to the second cylinder under test. The switching is divided into three states, as shown below. State 1: When the first and second tested cylinders are working normally, Vc1 and Vd1 are open, Va1, Vb1, Vp1, and Vt1 are closed; Vc2 and Vd2 are open, and Va2, Vb2, Vp2, and Vt2 are closed. State 2: When testing the first cylinder under test, Va1, Vb1, Vp1, and Vt1 are open; Vc1 and Vd1 are closed; Va2, Vb2, Vp2, Vt2, Vc2, and Vd2 are closed. State 3: When testing the second cylinder under test, Va1, Vb1, Vp1, Vt1, Vc1, and Vd1 are closed; Va2, Vb2, Vp2, and Vt2 are open; and Vc2 and Vd2 are closed.

[0020] When the first tested cylinder M1 and the second tested cylinder M2 are working normally, the shut-off valves Vc1 and Vd1, as well as the shut-off valves Vc2 and Vd2, are open, while the shut-off valves Va1, Vb1, Vp1, Vt1, Va2, Vb2, Vp2, Vt2 are all closed. At this time, the hydraulic cylinder leakage detection device does not participate in the detection.

[0021] When the first tested cylinder is being tested, shut-off valves Va1, Vb1, Vp1, and Vt1 are open, while shut-off valves Vc1 and Vd1, as well as shut-off valves Va2, Vb2, Vp2, Vt2, Vc2, and Vd2, are all closed. At this time, the hydraulic cylinder leakage detection module is connected to the circuit of the first tested cylinder, thus enabling leakage detection of the first tested cylinder. The second tested cylinder is temporarily blocked.

[0022] When the second tested cylinder is being tested, shut-off valves Va2, Vb2, Vp2, and Vt2 are open, while shut-off valves Vc2 and Vd2, as well as shut-off valves Va1, Vb1, Vp1, Vt1, Vc1, and Vd1, are all closed. At this time, the hydraulic cylinder leakage detection module is connected to the circuit of the second tested cylinder, thus enabling leakage detection of the second tested cylinder. The first tested cylinder is temporarily blocked.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An extension structure of a hydraulic cylinder leakage detection device, characterized by comprising: The hydraulic cylinder leakage detection module includes: An extension interface station for connecting multiple measured oil cylinders with the hydraulic cylinder leakage detection device; A switching valve group for controlling whether the measured oil cylinder is in a detection state; The extension interface station has four extension oil lines, each of which is provided with a plurality of docking points; each extension oil line has a docking point to form a docking unit, each switching valve group has eight interfaces and six cutoff elements; The docking unit includes a first docking unit, the first docking unit includes P1, T1, A1, and B1, the switching valve group includes a first switching valve group and a second switching valve group, the eight interfaces of the first switching valve group are a1, b1, p1, t1, c1, d1, x1, and y1, and the six cutoff elements of the first switching valve group are Va1, Vb1, Vp1, Vt1, Vc1, and Vd1; The x1 interface is divided into a first branch and a second branch, the first branch is connected to the docking point P1 through the cutoff element Vp1 and the interface p1, the second branch is connected to the interface c1 through the cutoff element Vc1, the interface c1 is connected to the measured oil cylinder cavity, the docking point A1 is connected to the cutoff element Va1 through the interface a1 and then connected to the interface c1, the y1 interface is divided into a third branch and a fourth branch, the third branch is connected to the docking point T1 through the cutoff element Vt1 and the interface t1, the fourth branch is connected to the interface d1 through the cutoff element Vd1, and the interface d1 is connected to the measured oil cylinder cavity; the docking point B1 is connected to the cutoff element Vb1 through the interface b1 and then connected to the interface d1.

2. The extended structure of the hydraulic cylinder leakage detection apparatus according to claim 1, characterized by, The docking unit includes a plurality of docking units with the same structure as the first docking unit.

3. The hydraulic cylinder leak detection apparatus extension of claim 1 or 2, wherein, The cutoff element is a cutoff valve and / or an electromagnetic reversing valve.

4. An extension method of a hydraulic cylinder leakage detection device, characterized by, The extension structure of the hydraulic cylinder leakage detection device according to claim 1 has six cutoff elements Va2, Vb2, Vp2, Vt2, Vc2, and Vd2 of a second switching valve group corresponding to a second measured oil cylinder, and three states are realized by switching: State one: the first and second measured oil cylinders are in normal operation, Vc1 and Vd1 are opened, Va1, Vb1, Vp1, and Vt1 are closed, Vc2 and Vd2 are opened, and Va2, Vb2, Vp2, and Vt2 are closed; State two: the first measured oil cylinder is detected, Va1, Vb1, Vp1, and Vt1 are opened, Vc1 and Vd1 are closed, and Va2, Vb2, Vp2, Vt2, Vc2, and Vd2 are closed; State three: the second measured oil cylinder is detected, Va1, Vb1, Vp1, Vt1, Vc1, and Vd1 are closed, Va2, Vb2, Vp2, and Vt2 are opened, and Vc2 and Vd2 are closed.

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