Mining multi-station electro-hydraulic control reversing valve test system

Abstract

The utility model provides a mining multi-station electro-hydraulic control reversing valve testing system, and belongs to the technical field of electro-hydraulic control reversing valve testing. The problems that an existing electro-hydraulic control reversing valve testing table is low in testing energy utilization rate, a high-pressure pump is seriously abraded, and durability is poor are solved. Comprising a hydraulic pump station system, a control valve group and a plurality of test stations. The hydraulic pump station system comprises a high-pressure pump station system used for achieving a high-pressure sealing test, a reversing test and a running-in test of the electro-hydraulic control reversing valve, a low-pressure pump station system used for achieving a low-pressure sealing test of the electro-hydraulic control reversing valve and an energy accumulator system. The high-pressure pump station system provides high-pressure emulsion for the energy accumulator system. The control valve group comprises a plurality of reversing valve groups with the same structure, each reversing valve group is connected with a test station, and each reversing valve group is composed of a first electromagnetic reversing valve, a second electromagnetic reversing valve, a third electromagnetic reversing valve and a one-way valve; the electro-hydraulic control reversing valve delivery test device is applied to electro-hydraulic control reversing valve delivery tests.

Description

Technical Field

[0001] The utility model provides a mining multi-station electro-hydraulic controlled directional valve test system, belonging to the technical field of electro-hydraulic controlled directional valve testing. Background Art

[0002] The factory test of the electro-hydraulic control reversing valve mainly includes the reversing test and the sealing test. The sealing test is divided into a high-pressure sealing test and a low-pressure sealing test. As a factory test, the test bench pump station uses a large-flow high-pressure emulsion pump to continuously supply liquid, which has low energy utilization. At the same time, continuous high pressure will accelerate the wear of the emulsion pump, and the durability and reliability are poor. Some test benches use a small-flow low-pressure pump plus a booster cylinder. The system boosting time is long, the test efficiency is low, and it is impossible to achieve multi-condition testing without interference. Utility Model Content

[0003] In order to solve the problems of low test energy utilization rate, serious wear of high-pressure pump and poor durability of the current electro-hydraulic controlled reversing valve test bench, the utility model proposes a mining multi-station electro-hydraulic controlled reversing valve test system, the purpose of which is to perform factory tests on multi-station electro-hydraulic controlled reversing valves in a highly efficient and energy-saving manner through hardware improvements or improvements to the combined connection of hardware modules and / or circuits.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a multi-station electro-hydraulic controlled reversing valve test system for mining, comprising a hydraulic pump station system, a control valve group and a plurality of test stations, wherein the hydraulic pump station system is used to introduce emulsion into the electro-hydraulic controlled reversing valve on the test station, the control valve group is used to control the start and stop of the low-pressure oil source and the high-pressure oil source of the plurality of test stations respectively, and the test station is used to place the electro-hydraulic controlled reversing valve to be tested;

[0005] The hydraulic pump station system includes a high-pressure pump station system for realizing high-pressure sealing test, reversing test and running-in test of the electro-hydraulic control reversing valve, a low-pressure pump station system for realizing low-pressure sealing test of the electro-hydraulic control reversing valve and an accumulator system. The high-pressure pump station system provides high-pressure emulsion to the accumulator system; the low-pressure pump station system and the high-pressure pump station system are respectively connected to the control valve group through pipelines;

[0006] The high-pressure pump station system includes a high-pressure filter for filtering the high-pressure emulsion, a high-pressure stop valve and a high-pressure check valve for preventing the high-pressure emulsion of the system from flowing back, a high-pressure electromagnetic unloading valve for starting and stopping the high-pressure pump station system and pressure protection, and a pressure sensor for detecting the pressure of the accumulator system. The high-pressure electromagnetic unloading valve, the pressure sensor, and the motor of the high-pressure pump station system are respectively connected to the microcontroller through wires;

[0007] The low-pressure pump station system includes a low-pressure filter for filtering low-pressure emulsion, a low-pressure stop valve for maintenance of the low-pressure pump station system, a low-pressure one-way valve for preventing the backflow of low-pressure pump emulsion, and a low-pressure electromagnetic unloading valve for no-load start and stop and pressure protection of the low-pressure pump station system. The low-pressure electromagnetic unloading valve and the motor of the low-pressure pump station system are respectively connected to the microcontroller through wires;

[0008] The control valve group includes multiple reversing valve groups of the same structure, each reversing valve group is connected to a test station, and each reversing valve group is composed of a first solenoid reversing valve, a second solenoid reversing valve, a third solenoid reversing valve and a one-way valve, wherein the first solenoid reversing valve is connected to the system main pipeline for system pressure relief, the second solenoid reversing valve is connected to the high-pressure pump station system pipeline for controlling the on and off of the high-pressure emulsion, and the third solenoid reversing valve is connected to the low-pressure pump station system pipeline for controlling the on and off of the low-pressure emulsion.

[0009] Each test station is also provided with a first pressure gauge for displaying the corresponding pressure of the electro-hydraulic directional control valve and the test station during the test process.

[0010] The high-pressure pump station system also includes a second pressure gauge for displaying the pressure of the high-pressure emulsion.

[0011] The low-pressure pump station system also includes a third pressure gauge for displaying the low-pressure emulsified fluid pressure.

[0012] The accumulator system includes a plurality of accumulators for storing and releasing high-pressure emulsion, a first stop valve for accumulator system maintenance, a second stop valve for accumulator system pressure relief, and a safety valve for protecting the accumulator system.

[0013] The high-pressure pump station system provides 36-40 MPa high-pressure emulsion to the accumulator system.

[0014] The number of the accumulators is arranged according to the number of test stations and electromagnetic reversing valves to be tested.

[0015] The control ends of the first electromagnetic reversing valve, the second electromagnetic reversing valve and the third electromagnetic reversing valve are respectively connected to the microcontroller through wires.

[0016] The beneficial effects of the utility model compared with the prior art are:

[0017] 1. Provide 36-40MPa high-pressure emulsion through the accumulator system. The high-pressure pump station system only increases the high-pressure emulsion to the accumulator system. By reasonably calculating the volume of the accumulator and the flow of the hydraulic pump, the working time of the high-pressure pump station for multi-station testing is ensured to be only 10% of the total time, which reduces the wear of the high-pressure pump station and increases its service life.

[0018] 2. Through the coordinated use of the low-pressure pump station system and the high-pressure pump station system, the low-pressure pump station system has a large flow rate, which can flush liquid into the test pipeline and the electro-hydraulic controlled reversing valve under test, and then carry out various tests, thereby reducing the consumption of high-pressure emulsion and saving energy.

[0019] 3. The separate configuration of the pump station control system, control valve group and test station reduces the vibration and noise of the pump station control system and improves the accuracy of the test.

[0020] 4. The reversing valve group integrates three electromagnetic reversing valves and one non-return valve, which reduces the risk of internal leakage in the system. Multiple stations can be used individually or in combination without affecting each other.

[0021] 5. Detect the pressure of the high-pressure pump station system through the pressure sensor, control the loading and unloading of the electromagnetic unloading valve, and control the start and stop of the high-pressure pump station system.

[0022] 6. Through the pressure sensor, electromagnetic unloading valve and logic time control of the high-pressure pump station system motor, the motor can be started and stopped without load, reducing the impact of the high-pressure pump station system valve.

[0023] 7. Through the effective design of the high-pressure pump station system and the accumulator system, one pump station system plus one control valve group can be used to test the multi-station electro-hydraulic controlled reversing valve, thus improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the system of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure inside a single reversing valve group of the utility model;

[0027] Figure 3 This is the control principle diagram of the high-pressure pump station system and the high-pressure electromagnetic unloading valve of the utility model;

[0028] In the figure: 1 is a hydraulic pump station system, 2 is a control valve group, 3 is a reversing valve group, 4 is a high-pressure pump station system, 5 is a high-pressure filter, 6 is a high-pressure stop valve, 7 is a high-pressure one-way valve, 8 is a high-pressure electromagnetic unloading valve, 9 is a pressure sensor, 10 is an accumulator, 11 is a first stop valve, 12 is a second stop valve, 13 is a safety valve, 14 is a low-pressure pump station system, 15 is a low-pressure filter, 16 is a low-pressure stop valve, 17 is a low-pressure one-way valve, 18 is a low-pressure electromagnetic unloading valve, 19 is a first electromagnetic reversing valve, 20 is a second electromagnetic reversing valve, 21 is a third electromagnetic reversing valve, 22 is a one-way valve, 23 is a first test station, 24 is a second test station, 25 is a third test station, 26 is a fourth test station, 27 is a first pressure gauge, 28 is a second pressure gauge, and 29 is a third pressure gauge. DETAILED DESCRIPTION

[0029] like Figures 1 to 3 As shown, the utility model provides a multi-station electro-hydraulic control reversing valve test system for mining, including a hydraulic pump station system 1, a control valve group 2 and multiple test stations, such as Figure 1 As shown, in this embodiment, a connection diagram for 4 test stations is provided, and the test system of the utility model includes but is not limited to 4 test stations. Multiple test stations can work simultaneously without affecting each other, thereby improving the utilization rate of the pump station and saving energy.

[0030] The hydraulic pump station system 1 is arranged in the pump room, and the control valve group 2 and the test station are arranged in the workshop, which realizes the separation of the test and the pump station, and reduces the interference of the vibration and noise of the hydraulic pump station system 1 on the test of the electro-hydraulic control reversing valve.

[0031] The hydraulic pump station system 1 includes a high-pressure pump station system 4 for high-pressure sealing test, reversing test and running-in test of the electro-hydraulic control reversing valve, a low-pressure pump station system 14 for low-pressure sealing test of the electro-hydraulic control reversing valve and an accumulator system. The high-pressure pump station system 4 is used to provide 36-40MPa high-pressure emulsion to the accumulator system, with a flow rate of 20L / min, and the low-pressure pump station system 14 is used to provide 2.5MPa low-pressure emulsion to the valve group under test, with a flow rate of 20L / min. The power of the low-pressure pump station system 14 is relatively small and can continuously supply liquid. When testing the electro-hydraulic control reversing valve, the low-pressure pump station system 14 fills the system pipeline and the tested valve group cavity, and the accumulator system provides emulsion for the subsequent reversing test and high-pressure sealing test. The emulsion for high-pressure testing is continuously provided by the accumulator system, and the high-pressure pump station system 4 only serves to provide the emulsion to the accumulator system. The high-pressure pump station system 4 ensures that the emulsion pressure of the accumulator system is maintained between 36MPa and 40MPa.

[0032] The high-pressure pump station system 4 includes a high-pressure filter 5 for filtering the high-pressure emulsion, a high-pressure stop valve 6 and a high-pressure check valve 7 for preventing the backflow of the system's high-pressure emulsion, a high-pressure electromagnetic unloading valve 8 for starting and stopping the high-pressure pump station system 4 and pressure protection, and a pressure sensor 9 for detecting the pressure of the accumulator system. The start and stop of the high-pressure pump station system 4 and the high-pressure electromagnetic unloading valve 8 are controlled by the detected pressure value.

[0033] The pressure sensor 9 is connected to the microcontroller, and transmits the measured pressure value to the microcontroller. The microcontroller sets the action time difference between the high-pressure electromagnetic unloading valve 8 and the motor to ensure that when the system needs to relieve pressure, the high-pressure electromagnetic unloading valve 8 unloads first and the motor stops running later; at the same time, when the system needs to load, the motor starts first and the high-pressure electromagnetic unloading valve 8 loads later. At the same time, the time difference can be adjusted to reduce the impact of the hydraulic system and ensure that the system reaches the best state. Through the pressure sensor 9 and the microcontroller, the motor start and stop and the electromagnetic unloading valve loading and unloading have a logical sequence, ensuring that the motor starts and stops without load, and reduces hydraulic shock.

[0034] The pressure sensor 9 detects the pressure of the accumulator system in real time. When the system pressure reaches 40MPa, the pressure sensor 9 sends an electrical signal to the high-pressure electromagnetic unloading valve 8, the high-pressure electromagnetic unloading valve 8 is energized, the pump station releases pressure, and the motor and emulsion pump of the high-pressure pump station system 4 stop running; when the system pressure drops to 36MPa, the pressure sensor 9 sends a signal to the high-pressure electromagnetic unloading valve 8 and the high-pressure pump station system 4, the high-pressure electromagnetic unloading valve 8 is powered off, the motor is started, and the high-pressure pump station system 4 starts to load.

[0035] The low-pressure pump station system 14 includes a low-pressure filter 15 for filtering the low-pressure emulsion, a low-pressure stop valve 16 for maintenance of the low-pressure pump station system 14, a low-pressure one-way valve 17 for preventing the backflow of the low-pressure pump emulsion, and a low-pressure electromagnetic unloading valve 18 for no-load start and stop and pressure protection of the low-pressure pump station system 14, and its set pressure is 2.5MPa.

[0036] The accumulator system includes an accumulator 10 mainly used for storing and releasing high-pressure emulsion, a first stop valve 11 for accumulator system maintenance, a second stop valve 12 for accumulator system pressure relief, and a safety valve 13 for protecting the accumulator system. In this embodiment, the setting value of the safety valve 13 is 44MPa to prevent the accumulator pressure from being too high, and the safety valve pressure is adjustable. The use of the accumulator 10 can effectively reduce the operation time of the pump station, and the number of accumulators 10 can be arranged according to the number of test stations and electromagnetic reversing valves to be tested.

[0037] The control valve group 2 is mainly used to control the start and stop of the low-pressure oil source and high-pressure oil source of multiple test stations respectively. At the same time, when the electro-hydraulic control reversing valve test is completed, the test station is relieved of pressure in response. The control valve group 2 is composed of multiple reversing valve groups 3 with similar functions, which control the corresponding test stations respectively, and the tests of multiple stations do not affect each other. The control valve group 2 and the test stations, including but not limited to 4-way, can be designed according to actual needs.

[0038] Each reversing valve group 3 is composed of a first electromagnetic reversing valve 19, a second electromagnetic reversing valve 20, a third electromagnetic reversing valve 21 and a one-way valve 22; wherein the first electromagnetic reversing valve 19, the second electromagnetic reversing valve 20 and the third electromagnetic reversing valve 21 are all of plug-in type structure, and their valve cores are of seat valve structure, which can achieve no leakage in the normal position; the one-way valve 22 is of seat valve structure, which plays a role in maintaining pressure for the test station. The first electromagnetic reversing valve 19 is used for the electromagnet to be energized and the system is depressurized when the test of the electro-hydraulic control reversing valve is completed. Due to its special seat valve structure, it can ensure that the system is leak-free when the electro-hydraulic control reversing valve is tested normally. The electromagnet of the second electromagnetic reversing valve 20 is energized, and the high-pressure pump station system 4 supplies high-pressure emulsion to the corresponding test station, and the test bench performs reversing, high-pressure sealing and running-in tests. The electromagnet is powered off, the connection between the test station and the high-pressure pump station system 4 is cut off, and the high-pressure emulsion stops supplying. The electromagnet of the third electromagnetic reversing valve 21 is energized, and the low-pressure pump station system 14 supplies low-pressure emulsion to the corresponding test station to perform a low-pressure sealing test. The electromagnet is de-energized, cutting off the connection between the test station and the low-pressure pump station system 14, and the low-pressure emulsion stops supplying.

[0039] The test station is used for testing the electro-hydraulic controlled reversing valve and is not limited to the 4-station test station.

[0040] A first pressure gauge 27 is provided at each test station, which is used to display the pressure corresponding to the electro-hydraulic control valve and the test station during the test process. The high-pressure pump station system 4 is provided with a second pressure gauge 28, which is used to display the pressure of the high-pressure pump station system 4, and a pressure sensor can be configured to display the system pressure at the test station. The low-pressure pump station system 14 is provided with a third pressure gauge 29, which is used to display the pressure of the low-pressure pump station system 14, and a pressure sensor can be configured to display the system pressure at the test station.

[0041] The following is based on the attached Figure 1-3 The structures of the four test stations provided are used to illustrate the principle of the present utility model.

[0042] Place the four electro-hydraulic controlled reversing valves to be tested on the first test station 23, the second test station 24, the third test station 25, and the fourth test station 26 respectively, calculate and configure the corresponding number of accumulators 10, ensure that the emulsion in the accumulator 10 can meet the normal operation of the test bench for at least 20 minutes, and complete the connection of the test system pipelines and electrical lines. First, start the low-pressure pump station system 14, and provide 2.5MPa low-pressure emulsion to the four electro-hydraulic controlled reversing valves to be tested at a flow rate of 20L / min through the low-pressure pump station system 14. At this time, the third electromagnetic reversing valve 21 is controlled to be energized, and the low-pressure pump station system 14 simultaneously supplies low-pressure emulsion to the four test stations, and the test bench performs a low-pressure sealing test. If there is no leakage in the four test stations, the next high-pressure sealing test can be carried out. If there is leakage in a test station, the third electromagnetic reversing valve 21 of the test station can be cut off to stop the low-pressure emulsion supply to the test station, and other test stations continue to carry out the next high-pressure sealing test. The emulsion for high-pressure test is continuously provided by the accumulator system, and the pressure of the accumulator system is detected in real time by the pressure sensor 9. When the pressure reaches 40MPa, the pressure sensor 9 transmits the signal to the microcontroller, the high-pressure electromagnetic unloading valve 8 is unloaded, and the second electromagnetic reversing valve 20 is energized. After 6 seconds, the motor of the high-pressure pump station system 4 stops running and stops supplying liquid to the accumulator system; when the pressure of the accumulator system drops to 36MPa, the pressure sensor 9 transmits the signal to the microcontroller, the motor of the high-pressure pump station system 4 starts, and after 8 seconds, the high-pressure electromagnetic unloading valve 8 is loaded, and the high-pressure pump station system 4 supplies liquid to the accumulator system to complete the high-pressure sealing test. After the high-pressure sealing test is completed, the accumulator 10 still supplies high-pressure emulsion to the first test station 23, the second test station 24, the third test station 25, and the fourth test station 26, and switches the knob of the electro-hydraulic control reversing valve under test to complete the reversing test and running-in test. After all tests are completed, the first electromagnetic valve 19 is switched, the system is depressurized, and the test is completed. The four test stations can be run simultaneously, or the number of test stations can be selected as needed, and the tests at each station will not interfere with each other.

[0043] The flow rate of the high-pressure pump station system 4 and the volume of the accumulator system are effectively calculated. The energy storage of the accumulator 10 can meet the normal operation of the test bench for 20 minutes. At the same time, when the accumulator system needs to be replenished, the high-pressure pump station system 4 can complete the replenishment within 2 minutes. The effective working time of the high-pressure pump station system 4 is only 10% of the total working time, which reduces energy consumption and reduces the wear of the high-pressure pump station system 4.

[0044] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A multi-station electro-hydraulic controlled directional valve test system for mining, characterized by: It includes a hydraulic pump station system, a control valve group and multiple test stations. The hydraulic pump station system is used to pass emulsion into the electro-hydraulic controlled reversing valve on the test station. The control valve group is used to control the start and stop of the low-pressure oil source and the high-pressure oil source of the multiple test stations respectively. The test station is used to place the electro-hydraulic controlled reversing valve to be tested. The hydraulic pump station system includes a high-pressure pump station system for realizing high-pressure sealing test, reversing test and running-in test of the electro-hydraulic control reversing valve, a low-pressure pump station system for realizing low-pressure sealing test of the electro-hydraulic control reversing valve and an accumulator system. The high-pressure pump station system provides high-pressure emulsion to the accumulator system; the low-pressure pump station system and the high-pressure pump station system are respectively connected to the control valve group through pipelines; The high-pressure pump station system includes a high-pressure filter for filtering the high-pressure emulsion, a high-pressure stop valve and a high-pressure check valve for preventing the high-pressure emulsion of the system from flowing back, a high-pressure electromagnetic unloading valve for starting and stopping the high-pressure pump station system and pressure protection, and a pressure sensor for detecting the pressure of the accumulator system. The high-pressure electromagnetic unloading valve, the pressure sensor, and the motor of the high-pressure pump station system are respectively connected to the microcontroller through wires; The low-pressure pump station system includes a low-pressure filter for filtering low-pressure emulsion, a low-pressure stop valve for maintenance of the low-pressure pump station system, a low-pressure one-way valve for preventing the backflow of low-pressure pump emulsion, and a low-pressure electromagnetic unloading valve for no-load start and stop and pressure protection of the low-pressure pump station system. The low-pressure electromagnetic unloading valve and the motor of the low-pressure pump station system are respectively connected to the microcontroller through wires; The control valve group includes multiple reversing valve groups of the same structure, each reversing valve group is connected to a test station, and each reversing valve group is composed of a first solenoid reversing valve, a second solenoid reversing valve, a third solenoid reversing valve and a one-way valve, wherein the first solenoid reversing valve is connected to the system main pipeline for system pressure relief, the second solenoid reversing valve is connected to the high-pressure pump station system pipeline for controlling the on and off of the high-pressure emulsion, and the third solenoid reversing valve is connected to the low-pressure pump station system pipeline for controlling the on and off of the low-pressure emulsion.

2. A mining multi-station electro-hydraulic controlled directional valve test system according to claim 1, characterized in that: Each test station is also provided with a first pressure gauge for displaying the corresponding pressure of the electro-hydraulic directional control valve and the test station during the test process.

3. The multi-position electro-hydraulic controlled directional valve test system for mining according to claim 1 is characterized in that: The high-pressure pump station system also includes a second pressure gauge for displaying the pressure of the high-pressure emulsion.

4. A mining multi-station electro-hydraulic control reversing valve test system according to claim 1, characterized in that: The low-pressure pump station system also includes a third pressure gauge for displaying the low-pressure emulsified fluid pressure.

5. The multi-position electro-hydraulic controlled directional valve test system for mining according to claim 1 is characterized in that: The accumulator system includes a plurality of accumulators for storing and releasing high-pressure emulsion, a first stop valve for accumulator system maintenance, a second stop valve for accumulator system pressure relief, and a safety valve for protecting the accumulator system.

6. A mining multi-station electro-hydraulic controlled directional valve test system according to claim 1, characterized in that: The high-pressure pump station system provides 36-40 MPa high-pressure emulsion to the accumulator system.

7. A mining multi-station electro-hydraulic controlled directional valve test system according to claim 5, characterized in that: The number of the accumulators is arranged according to the number of test stations and electromagnetic reversing valves to be tested.

8. The multi-position electro-hydraulic controlled directional valve test system for mining according to claim 1 is characterized by: The control ends of the first electromagnetic reversing valve, the second electromagnetic reversing valve and the third electromagnetic reversing valve are respectively connected to the microcontroller through wires.

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