A large flow test bench
By designing a hydraulic pipeline system including oil storage tank, hydraulic controlled check valve and energy accumulator, the resistance loss and capacity loss problems in the hydraulic control system in the high-flow test bench were solved, and the system was quickly started and efficiently operated.
Patent Information
- Application Number
- CN202110607574.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-06-01
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-06-01
AI Technical Summary
In the existing large flow test bench, there are resistance losses caused by switch valves during the operation of the oil cylinder and capacity losses during the flow of liquids in the hydraulic control system, which affects the efficiency of the system.
A large flow test bench is designed, which includes a hydraulic pipeline that controls the loading of the main oil cylinder. It is composed of components such as the oil storage tanks A and B, three-cylinder plunger pump unit, hydraulically controlled check valve, electromagnetic reversing valve, energy accumulator and other components to achieve rapid start-up of the system, and reduces the resistance loss of the switch valve and the ability to flow by the hydraulic controlled check valve and the energy accumulator.
The rapid start of the system is achieved, eliminating the resistance loss of the switch valve during the operation of the oil cylinder, reducing the loss of capacity during the liquid flow, and improving the system efficiency.
Smart Images
Figure CN113217505B_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of test devices, and in particular, relates to a large flow test bench. Background Art
[0002] In the process of comprehensive mechanized mining of underground coal, the hydraulic support is often damaged by the impact of the roof, especially under hard and difficult roof conditions. In addition to taking measures such as improving the strength of the support, softening the roof with water injection and wallpapering, a more effective way is to design the hydraulic support into an impact-resistant type. The impact resistance of the hydraulic support mainly depends on the impact resistance of the column, which is specially designed and equipped with a large flow safety valve, accumulator and other components to form an impact protection device for the hydraulic support. Therefore, the performance of the large flow safety valve determines the impact resistance of the hydraulic support and has a significant impact on the safety of coal mining equipment. The large flow test bench is a test and testing equipment for detecting the performance of the large flow safety valve, and the main components of the large flow test bench are the loading cylinder and the hydraulic control system that controls the loading cylinder. How to design a reasonable hydraulic control system has become one of the technical problems that the industry needs to solve, and it also affects the performance of the large flow test bench. Summary of the invention
[0003] The purpose of this application is to provide a large flow test bench, which can achieve rapid startup of the system, and can completely eliminate the resistance loss caused by the switch valve during the operation of the cylinder, reduce the capacity loss during the liquid flow process, and improve the system efficiency.
[0004] To achieve the above objectives, this application is implemented through the following technical solutions:
[0005] A large flow test bench described in the present invention comprises a hydraulic pipeline for controlling a loading main oil cylinder, wherein the hydraulic pipeline comprises an oil storage tank A and an oil storage tank B, wherein the oil storage tank A is connected to a three-cylinder plunger pump unit through a hydraulic pipeline, the three-cylinder plunger pump unit is respectively connected to a valve group B, a valve group A, and a pressure sensor A in series through a hydraulic pipeline, the hydraulic pipeline in which the pressure sensor A is connected to the valve group A is connected to a tested element, the valve group A is provided with an oil return pipeline A, and the oil return pipeline A is connected to the oil storage tank A; wherein the valve group B and the valve group A are respectively connected to an electromagnetic reversing valve through a hydraulic pipeline, the electromagnetic reversing valve is connected to two parallel hydraulically controlled one-way valves B through a hydraulic pipeline, one of which is connected to the loading main oil cylinder through a hydraulic pipeline, and the other is connected to the pressure sensor A through a hydraulic pipeline. The oil tank B is connected to the pressure sensor C, and two accumulators are connected in parallel on the hydraulic pipeline between the hydraulically controlled one-way valve B and the electromagnetic reversing valve connected to the pressure sensor C; the oil storage tank B is connected to the oil pump motor unit through the hydraulic pipeline, the oil pump motor unit is connected to the pressure pipeline filter through the hydraulic pipeline, the pressure pipeline filter is connected to the high-pressure ball valve and the one-way valve C in sequence through the hydraulic pipeline, the one-way valve C is connected to two parallel two-position four-way valves through the hydraulic pipeline, the hydraulic pipeline between the one-way valve C and the two-position four-way valve is connected to the return oil pipeline B, the return oil pipeline B is connected to the oil storage tank B, the two two-position four-way valves are connected to the loading master cylinder through the hydraulic pipeline, and the loading master cylinder is provided with a pressure sensor B; two accumulators are also connected in parallel on the hydraulic pipeline connecting the one-way valve C and the two parallel two-position four-way valves.
[0006] Furthermore, the oil storage tanks described in the present invention all include an air filter and a liquid temperature and level gauge, and a mesh oil filter is provided on the hydraulic pipeline connecting the oil storage tank with the three-cylinder plunger pump unit and the oil pump motor unit, and the mesh oil filter is located inside the oil storage tank.
[0007] Furthermore, a safety valve and a pressure sensor D are connected to the hydraulic pipeline connecting the three-cylinder plunger pump unit and the hydraulically controlled one-way valve A described in the present invention.
[0008] Furthermore, an electromagnetic overflow valve is connected in parallel between the pressure pipeline filter and the hydraulic pipeline connected to the high-pressure ball valve in the present invention, and the electromagnetic overflow valve is connected to the oil storage tank B through the hydraulic pipeline.
[0009] Furthermore, a shock-resistant pressure gauge is provided on the hydraulic pipeline connected to the accumulator described in the present invention.
[0010] Furthermore, the detection range of the pressure sensor B described in the present invention is 0-50 MPa, the detection range of the pressure sensor A is 0-100 MPa, and the detection range of the seismic-resistant pressure gauge is 0-40 MPa.
[0011] Compared with the prior art, the beneficial effects of this application are:
[0012] The present invention can realize rapid startup of the system, and can completely eliminate the resistance loss generated by the switch valve during the action of the oil cylinder, reduce the capacity loss during the flow of liquid, and improve the system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the principle of the present invention.
[0014] In the figure: 1. Liquid temperature and level gauge; 2. Mesh oil filter; 3. Air filter; 4. Three-cylinder plunger pump unit; 5. Safety valve; 6. Hydraulic control non-return valve A; 7. Valve group B; 8. Valve group A; 9. Pressure sensor A; 10. Solenoid reversing valve; 11. Valve group C; 12. Pressure sensor B; 13. Hydraulic control non-return valve B; 14. Two-position four-way valve; 15. Valve group D; 16. Seismic pressure gauge; 17. Accumulator installation assembly; 18. Accumulator; 19. Non-return valve C; 20. High-pressure ball valve; 21. Solenoid overflow valve; 22. Oil pump motor unit; 23. Pressure line filter; 24. Loading main oil cylinder; 25. Pressure sensor C; 26. Pressure sensor D. DETAILED DESCRIPTION
[0015] The technical solution described in this application is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the directional nouns that may be involved in the following paragraphs, including but not limited to "up, down, left, right, front, back", etc., are based on the visual directions shown in the corresponding drawings of the specification, and they should not and should not be regarded as limiting the scope of protection of this technical solution. Their purpose is only to facilitate technicians in this field to better understand the technical solution described in the specification.
[0016] In the description of the following paragraphs, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and similar expressions should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances combined with the common knowledge, design specifications, standard documents, etc. in this field.
[0017] like Figure 1As shown, the oil storage tank A in the present invention is used to contain the emulsion, and the emulsion is pumped by the three-cylinder plunger pump unit 4. The three-cylinder plunger pump unit 4 is connected to a hydraulically controlled one-way valve 6 through a hydraulic pipeline, and the hydraulic one-way valve 6 constitutes a valve group B7; the outlet of the hydraulically controlled one-way valve 6 is respectively connected to a valve group A8 and an electromagnetic reversing valve 10, and the valve group A8 includes a plurality of one-way valves, and is respectively connected to a pressure sensor A9, an electromagnetic reversing valve 10 and an oil return pipeline A, wherein the oil return pipeline A is connected to the oil storage tank A. The hydraulic pipeline between the pressure sensor A9 and the valve group A8 is connected to a tested element, and the tested element is connected to a loading main oil cylinder 24 through a hydraulic pipeline. The loading main oil cylinder 24 has a first chamber connected to the tested safety valve, a second chamber for pressurizing the first chamber, and a liquid supply auxiliary cylinder; wherein the first chamber is connected to the supply pipeline of the emulsion, and the second chamber is used to be connected to the supply pipeline of the hydraulic oil. The loading main oil cylinder 24 is provided with a displacement sensor for measuring loading stroke data, and the pressure data of the loading test safety valve is obtained by using the pressure sensor A9.
[0018] In the present invention, the electromagnetic reversing valve 10 is connected to two parallel hydraulically controlled one-way valves B13 through a pipeline, one of which is connected to a pressure sensor C25, and two parallel accumulators 18 and a seismic pressure gauge 16 are provided on the hydraulic pipeline connecting the hydraulically controlled one-way valve 13 and the pressure sensor C25, for detecting the pressure of the hydraulic pipeline. In the present invention, the other hydraulically controlled one-way valve B13 connected to the electromagnetic reversing valve 10 is connected to the loading main oil cylinder 24.
[0019] In the present invention, the oil storage tank B contains hydraulic oil, and the hydraulic oil can be connected to a pressure line filter 23 through a hydraulic pipeline. The pressure line filter 23 is used to ensure that the hydraulic oil sucked out by the oil pump motor group 22 has sufficient purity to ensure the stability of the subsequent hydraulic system. In the present invention, the oil pump motor group 22 is connected to the electromagnetic overflow valve 21 and the high-pressure ball valve 20 in parallel through the pressure line filter 23, wherein the electromagnetic overflow valve 21 is connected to the oil storage tank B through a hydraulic pipeline, the high-pressure ball valve 20 is connected to the check valve C19 through a hydraulic pipeline, and the check valve C19 is connected to the valve group D15 through a hydraulic pipeline, and the valve group D15 includes two parallel two-position four-way valves 14, and the two-position four-way valves 14 are respectively connected to the check valve C19 through a hydraulic pipeline and then connected to the loading main oil cylinder 24. A check valve connecting the two can be provided between the hydraulic pipelines connecting the two-position four-way valve 14 and the loading main oil cylinder 24. The loading master cylinder 24 is provided with a pressure sensor B12 , which is located on a hydraulic pipeline connecting the two-position four-way valve 14 and the loading master cylinder 24 .
[0020] In the present invention, the hydraulic pipeline connecting the one-way valve C19 and the valve group D15 is connected with two accumulators 18 in parallel. The maximum capacity of the accumulator is N×40L (N is the number of accumulators), and the boost ratio of the main loading cylinder is 1:2.44.
[0021] In the present invention, the overall hydraulic system includes two parts: a hydraulic oil system and an emulsion system. The hydraulic oil system supplies power to the main oil cylinder and various control ports, controls the pressure of the accumulator through the pressure regulation of the valve group and the oil pump motor group, and then reaches the emulsion pressure output during fast loading. This system controls various oil circuit actions through an electromagnetic reversing valve group, and uses an electromagnetic overflow valve to control the load unloading of the hydraulic oil system. When the oil pump motor group is in a starting but non-operating state, the hydraulic oil system is in an unloading state. The emulsion system described in the present invention mainly provides test media to the tested components, and a replaceable transition joint is configured above the test bench to adapt to safety valves of different specifications.
[0022] In the present invention, the pumping power of the hydraulic oil system is 7.5KW, and the pumping power of the emulsion system is 3KW; the rated pumping flow of the hydraulic oil system is 14.5L / min, and the rated pumping flow of the emulsion system is 20L / min; the maximum working pressure of the hydraulic oil system is 30MPa, and the maximum working pressure of the emulsion system is 31.5MPa; the working medium of the hydraulic oil system is 46# anti-wear hydraulic oil, and the working medium of the emulsion system is 5% emulsion.
[0023] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A large flow test bench, comprising a hydraulic pipeline for controlling the loading of a main oil cylinder, wherein the hydraulic pipeline comprises an oil storage tank A and an oil storage tank B, and is characterized in that: The oil storage tank A is connected to the three-cylinder plunger pump unit (4) through a hydraulic pipeline. The three-cylinder plunger pump unit (4) is connected to a valve group B (7), a valve group A (8) and a pressure sensor A (9) in series through the hydraulic pipeline. The hydraulic pipeline connecting the pressure sensor A (9) and the valve group A (8) is connected to a tested element. The valve group A (8) is provided with an oil return pipeline A, which is connected to the oil storage tank A. The valve groups B (7) and A (8) are connected to an electromagnetic reversing valve (10) through hydraulic pipelines. The electromagnetic reversing valve (10) is connected to two parallel hydraulically controlled one-way valves B (13) through hydraulic pipelines. One of the hydraulically controlled one-way valves B (13) is connected to a main oil loading device through a hydraulic pipeline. The oil storage tank B is connected to the oil pump motor unit (22) through the hydraulic pipeline, the oil pump motor unit (22) is connected to the pressure pipeline filter (23) through the hydraulic pipeline, the pressure pipeline filter (23) is connected to the high-pressure ball valve (20) and the check valve C (19) in sequence through the hydraulic pipeline, the check valve C (19) is connected to two parallel two-position four-way valves (14) through the hydraulic pipeline, and the check valve C (19) is connected to the two-position four-way valves (14) through the hydraulic pipeline. The hydraulic pipeline between the two positions is connected to an oil return pipeline B, which is connected to an oil storage tank B. The two two-position four-way valves (14) are respectively connected to the loading main oil cylinder (24) through the hydraulic pipelines, and the loading main oil cylinder (24) is provided with a pressure sensor B (12); two accumulators (18) are also connected in parallel on the hydraulic pipeline connecting the one-way valve C (19) and the two parallel two-position four-way valves (14); the oil storage tanks each include an air filter (3) and a liquid temperature and level gauge (1); a mesh oil filter (2) is provided on the hydraulic pipeline connecting the oil storage tank and the three-cylinder plunger pump unit (4) and the oil pump motor unit (22); the mesh oil filter (2) is located in the oil storage tank; the three-cylinder plunger pump unit (4) and the hydraulic control one-way valve are connected to the hydraulic pipeline. A safety valve (5) and a pressure sensor D (26) are connected to the hydraulic pipeline connected to the pressure pipeline filter (23) and the high-pressure ball valve (20); an electromagnetic overflow valve (21) is connected in parallel between the hydraulic pipeline connected to the pressure pipeline filter (23) and the high-pressure ball valve (20), and the electromagnetic overflow valve (21) is connected to the oil storage tank B through the hydraulic pipeline; a seismic pressure gauge (16) is arranged on the hydraulic pipeline connected to the accumulator (18); the detection range of the pressure sensor B (12) is 0-50 MPa, the detection range of the pressure sensor A (9) is 0-100 MPa, and the detection range of the seismic pressure gauge (16) is 0-40 MPa; the maximum capacity of the accumulator (18) is N×40L, where N is the number of accumulators.
Citation Information
Patent Citations
Large-flow test bench
CN214742481U