A high-frequency pulse test device

Abstract

The present invention belongs to the technical field of test devices, and specifically relates to a high-frequency pulse test device. The device comprises a source oil power mechanism, a pulse generating mechanism, and a medium circulation exhaust mechanism connected in sequence; the source oil power mechanism's power source tank is connected to the pulse generating mechanism's oil inlet and oil return terminals, respectively; the pulse generating mechanism's output terminal is connected to the medium circulation exhaust mechanism's input terminal; the medium circulation exhaust mechanism's oil inlet and oil return terminals are respectively connected to the medium source tank; and the medium source tank is connected to the experimental equipment; the pulse generating mechanism's oil inlet pipeline is connected to the pressure regulating and protecting mechanism's oil inlet, and the pulse generating mechanism's oil return pipeline is connected to the pressure regulating and protecting mechanism's oil return terminal.

Description

Technical Field

[0001] The invention belongs to the technical field of test devices, and in particular relates to a high-frequency pulse test device. Background Art

[0002] The high-frequency pulse tester is suitable for the production, application and research of rubber hoses, automotive brake hoses, automotive air conditioners, radiator hoses, evaporators, condensers and other industries in the automotive, chemical, university, laboratory, research institute, government agency, aerospace and other fields. It can meet customers' requirements for pressure pulse testing equipment for rubber hoses, automotive brake hoses, power steering hoses, clutch hoses, automotive air conditioners and radiator hoses.

[0003] Current high-frequency pulse test equipment is primarily designed for pressure pulse testing of rubber hoses, automotive brake hoses, power steering hoses, clutch hoses, automotive air conditioners, evaporators, condensers, and radiator hoses. The deformation of test specimens can be significantly affected by varying specifications and types, test pressures, and medium and ambient temperature variations. This effect is particularly pronounced during high-frequency testing, hindering test performance and potentially even preventing certain tests from being conducted. This also places higher demands on the ease of operation and safety of pressure devices. Summary of the Invention

[0004] Purpose of the invention: To make the performance of the pulse generating mechanism more conducive to the favorable implementation of high-frequency pulse testing; to facilitate the pressure level regulation of the pressure device and the upgrading of the safety level of the pressure device.

[0005] Technical solution: A high-frequency pulse test device includes a source oil power mechanism, a pulse generating mechanism, and a medium circulation exhaust mechanism connected in sequence;

[0006] The power source oil tank of the source oil power mechanism is respectively connected to the oil inlet and oil return ends of the pulse generating mechanism, the output end of the pulse generating mechanism is connected to the input end of the medium circulation exhaust mechanism, the oil inlet and oil return ends of the medium circulation exhaust mechanism are respectively connected to the medium source oil tank, and the medium source oil tank is connected to the experimental equipment;

[0007] The oil inlet end pipeline of the pulse generating mechanism is connected to the oil inlet end of the pressure regulating and protecting mechanism, and the oil return end pipeline of the pulse generating mechanism is connected to the oil return end of the pressure regulating and protecting mechanism.

[0008] The pipeline at the oil inlet end of the pulse generating mechanism is provided with: an oil suction filter, a power source motor pump group and a high-pressure filter in sequence from the pipeline oil inlet; the pipeline at the oil return end of the pulse generating mechanism is provided with a cooler.

[0009] A pressure sensor is provided on the pipeline between the output end of the pulse generating mechanism and the input end of the medium circulation exhaust mechanism.

[0010] The pipeline at the oil inlet end of the medium circulation exhaust mechanism is provided with: a medium source motor pump group and a filter in sequence from the pipeline oil inlet; the pipeline at the oil return end of the medium circulation exhaust mechanism is provided with a solenoid valve.

[0011] A pressure gauge and an accumulator are provided on the pipeline at the oil inlet end of the pressure regulating protection mechanism.

[0012] Advantages and effects: The medium circulation and exhaust mechanism of the high-frequency pulse test device of the present application ensures the smooth completion of the early flushing and exhaust of the test sample, and eliminates the influence of the gas change on the overall change of the test sample under the conditions of different test pressures, medium temperature changes and ambient temperature changes to the greatest extent, thereby improving the flushing and exhaust efficiency of the medium circulation and exhaust mechanism pipeline; the improvement of the pulse generating mechanism makes the performance of the pulse generating mechanism more conducive to the favorable implementation of high-frequency pulse tests; it facilitates the pressure level regulation of the pressure mechanism and the upgrading of the safety level of the pressure mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the overall structure of the high-frequency pulse test device of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the medium circulation exhaust mechanism of the present invention;

[0015] Figure 3 Schematic diagram of the structure of the pulse generating mechanism of the present invention;

[0016] Figure 4 It is a structural schematic diagram of the pressure regulating protection mechanism of the present invention.

[0017] Figure symbols: 1. Power source oil tank, 2. Oil suction filter, 3. Switch valve, 4. Power source motor pump group, 5. Power source check valve, 6. High-pressure filter, 7. Cooler, 8. Pressure gauge, 9. Accumulator, 10. Pressure regulating and protecting mechanism, G. Oil inlet of pressure regulating and protecting mechanism, H. Oil return port of pressure regulating and protecting mechanism, 11. Pulse generating mechanism, A. Oil inlet of pulse generating mechanism, B. Oil return port of pulse generating mechanism, C. Oil output port of pulse generating mechanism, D. Test input oil port, E. Medium oil return port, F. Medium oil inlet, 12. Pressure sensor 13. Medium circulation exhaust Mechanism, 14. Solenoid valve, 15. Filter, 16. Medium oil inlet check valve, 17. Check valve, 18. Medium source motor pump unit, 19. Medium source oil tank, 20. Medium oil inlet exhaust valve, 21. Exhaust tank, 22. Exhaust tank switch valve, 23. Medium oil return exhaust valve, 24. Test chamber, 25. Test piece, 26. Circulation valve, 27. Pulse generating mechanism oil inlet accumulator, 28. Servo proportional valve, 29. Pulse generator, 30. Displacement sensor, 31. Pulse generating mechanism return oil accumulator, 32. Solenoid overflow valve, 33. Remote pressure regulating valve, 34. Safety valve. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] like Figure 1-4 As shown, a high-frequency pulse test device includes a source oil power mechanism, a pulse generating mechanism 11 and a medium circulation exhaust mechanism 13 connected in sequence;

[0020] The power source oil tank 1 of the source oil power mechanism is respectively connected to the oil inlet and oil return ends of the pulse generating mechanism 11, the output end of the pulse generating mechanism 11 is connected to the input end of the medium circulation exhaust mechanism 13, the oil inlet and oil return ends of the medium circulation exhaust mechanism 13 are respectively connected to the medium source oil tank 19, and the medium source oil tank 19 is connected to the experimental equipment;

[0021] The oil inlet end pipeline of the pulse generating mechanism 11 is connected to the oil inlet end of the pressure regulating and protecting mechanism 10 , and the oil return end pipeline of the pulse generating mechanism 11 is connected to the oil return end of the pressure regulating and protecting mechanism 10 .

[0022] Specifically, the medium circulation and exhaust mechanism 13 of the high-frequency pulse test device of the present application ensures the smooth completion of the early flushing and exhaust of the test sample, and eliminates to the greatest extent the influence of the gas change on the overall change of the test sample under the conditions of different test pressures, medium temperature changes and ambient temperature changes, thereby improving the flushing and exhaust efficiency of the pipeline of the medium circulation and exhaust mechanism 13; the improvement of the pulse generating mechanism 11 makes the performance of the pulse generating mechanism 11 more conducive to the favorable implementation of the high-frequency pulse test; and facilitates the pressure level regulation of the pressure mechanism and the upgrading of the safety level of the pressure mechanism.

[0023] The pipeline at the oil inlet end of the pulse generating mechanism 11 is provided with: an oil suction filter 2, a power source motor pump group 4 and a high-pressure filter 6 in sequence from the pipeline oil inlet; the pipeline at the oil return end of the pulse generating mechanism 11 is provided with a cooler 7.

[0024] Specifically, one end of the oil suction filter 2 is introduced into the power source tank 1, and the other end is connected to the switch valve 3. The power source one-way valve 5 is arranged between the power source motor pump group 4 and the high-pressure filter 6; the power source tank 1 provides power oil to the power source motor pump group 4 through the oil suction filter 2 and the switch valve 3; the oil suction filter 2 plays the role of coarse filtering of the oil, which meets the requirements of the power source motor pump group 4 for oil. The switch valve 3 can open and close the oil supply of the power source tank 1 to the power source motor pump group 4, which is convenient for the later repair and maintenance of the equipment; the power source motor pump group 4 is connected to the oil inlet A of the pulse generating mechanism through the power source one-way valve 5 and the high-pressure filter 6, providing the pulse generating mechanism 11 with stable and constant input pressure oil, which returns to the power source tank 1 through the pulse generating mechanism return oil port B and the cooler 7 after conversion by the pulse generating mechanism 11. The power source check valve 5 prevents backflow of the power oil. The high-pressure filter 6 further refines the oil to ensure the cleanliness of the oil entering the pulse generating mechanism 11, thus ensuring its operation. The pressure gauge 8 displays the pressure in the power source tank 1. The accumulator 9 absorbs hydraulic shocks, stabilizes pressure, or replenishes oil. The pressure regulating and protective mechanism 10 regulates the pressure of the device and protects the power source tank 1, preventing damage caused by excessive pressure within the mechanism. The cooler 7 on the power source mechanism's return oil line reduces the return oil temperature, ensuring that the oil operates within the set temperature range and ensuring its service life. The pulse generating mechanism's output port C is connected to the test input port D through a pressure sensor 12, providing the required set pressure for the test. The medium source oil tank 19 supplies the test medium oil to the medium source motor pump assembly 18. This oil is then connected to the medium inlet F through a one-way valve 17, a filter 15, and a one-way valve 16. This provides test oil for the test. The one-way valve 17 prevents backflow of the medium oil. The filter 15 ensures the cleanliness of the test oil. The one-way valve 16 prevents the test pressure from damaging the medium source and causing unnecessary losses. The opening and closing of the solenoid valve 14 assists the exhaust of the medium circulation exhaust mechanism 13, and cooperates with the pulse generator 11 to achieve pressure fluctuations during the test.

[0025] A pressure sensor 12 is provided on the pipeline between the output end of the pulse generating mechanism 11 and the input end of the medium circulation exhaust mechanism 13 .

[0026] Specifically, the pulse generator 11 consists of a pulse generator inlet accumulator 27, a servo proportional valve 28, a pulse generator 29, a displacement sensor 30, and a pulse generator return port accumulator 31. Power oil enters the servo proportional valve 28 through the pulse generator inlet port A and then flows back through the pulse generator return port B after the servo proportional valve 28 is actuated, forming a basic circuit. The pulse generator inlet accumulator 27 and the pulse generator return port accumulator 31 are connected in parallel at the inlet and return ports of the servo proportional valve 28. The servo proportional valve 28 regulates the power source input pressure at the test frequency. After conversion by the pulse generator 29, the pressure is output through the pulse generator output port C, creating the pressure fluctuations required for the test. The pulse generator inlet accumulator 27 and the pulse generator return port accumulator 31 maximize the servo proportional valve 28's precision in regulating the power source input pressure, ensuring the successful conduct of the test.

[0027] The pipeline at the oil inlet end of the medium circulation exhaust mechanism 13 is provided with: a medium source motor pump group 18 and a filter 15 in sequence from the pipeline oil inlet; the pipeline at the oil return end of the medium circulation exhaust mechanism 13 is provided with a solenoid valve 14.

[0028] Specifically, a one-way valve 17 is installed between the medium source motor pump assembly 18 and the filter 15. The other end of the filter 15 is connected to the medium oil inlet one-way valve 16. A medium oil inlet exhaust valve 20, an exhaust tank 21, a medium oil return exhaust valve 23, a test piece 25, and a circulation valve 26 form an openable / closed loop within the test chamber 24. The medium oil enters through the medium oil inlet F and flows back through the medium oil return E, forming the basic circuit. Close the circulation valve 26, and the medium oil is circulated and exhausted through the test piece 25. After a period of time, open the medium oil inlet exhaust valve 20 or the medium oil return exhaust valve 23 to exhaust the oil inlet or oil return port of the test piece 25 for secondary exhaust, and further exhaust the gas in the test piece 25. This process can be repeated alternately multiple times to achieve enhanced exhaust effect; the exhaust tank 21 exhausts the exhaust tank 21 itself and automatically replenishes the fluid from the medium source tank 19 through the exhaust tank switch valve 22; open the circulation valve 26 to circulate the pipeline of the medium circulation exhaust mechanism 13, circulate the internal pipeline to take away the gas in the pipeline, and the cycle time depends on the specific situation.

[0029] A pressure gauge 8 and an accumulator 9 are provided on the pipeline at the oil inlet end of the pressure regulating protection mechanism 10.

[0030] Specifically, the pressure regulation and protection mechanism 10 consists of an electromagnetic relief valve 32, a remote pressure regulating valve 33, and a safety valve 34. The pressure regulation and protection mechanism's oil inlet G is connected to the mechanism pipeline, and its oil return port H is connected to the return oil pipeline. The electromagnetic relief valve 32 sets the mechanism's maximum operating pressure, providing primary pressure protection. The pressure within the device is established or unloaded by switching the solenoid of the electromagnetic relief valve 32 on and off. The remote pressure regulating valve 33 is connected to the control port of the electromagnetic relief valve 32, forming a remote pressure regulation circuit. Adjustment of the remote pressure regulating valve 33 can create different operating conditions for the mechanism's pressure (the pressure within the mechanism after adjustment by the remote pressure regulating valve 33 is less than the mechanism's maximum operating pressure), facilitating the requirements for the device's internal operating pressure under different test conditions and improving the operating capacity of the pulse generating mechanism 11. The safety valve 34 is a safety upgrade to the electromagnetic relief valve 32 protection mechanism. The set pressure of the safety valve 34 is slightly higher than that of the electromagnetic relief valve 32, providing secondary pressure protection for the pressure within the device. The pressure regulating protection mechanism 10 facilitates the pressure level regulation of the device so that the pressure mechanism can be safely protected at multiple levels.

[0031] The operation method of the high-frequency pulse test device is as follows:

[0032] At the beginning of the test, the power source motor pump group 4 and the medium source motor pump group 18 remain in the started state until the end of the test; the power source motor pump group 4 makes the source oil power tank 1 output a constant pressure, switches the servo proportional valve 28, and makes the internal components of the pulse generator 29 move relative to each other, causing the medium oil in the test piece 25 to change in pressure. When the internal components of the pulse generator 29 move toward the output oil port C and the solenoid valve 14 remains in the closed state, the medium oil pressure in the test piece 25 rises; when the internal mechanism of the pulse generator 29 moves in the opposite direction to the pulse generator output oil port C and the solenoid valve 14 remains in the open state, the medium oil pressure in the test piece 25 drops, realizing pressure alternation (test waveform), and continuously repeating the process of medium oil pressure rise / fall in the test piece 25. When the number reaches the set value, the test ends automatically.

[0033] The pulse generating mechanism oil inlet accumulator 27 and the pulse generating mechanism oil return accumulator 31 assist the servo proportional valve 28 when the pressure alternation time is short (the test frequency is high). The servo proportional valve 28 switches to meet the rising / falling process of the medium oil pressure in the test piece 25 (further explained as: the pulse generating mechanism oil inlet accumulator 27 and the pulse generating mechanism oil return accumulator 31 are filled with different pressures, and the power source motor pump group 4 fills the pulse generating mechanism oil inlet accumulator 27 and the pulse generating mechanism oil return accumulator 31 with oil passing through the servo proportional valve 28. Under high frequency conditions, the servo proportional valve 28 is required to pass more oil in a shorter time, and the oil in the pulse generating mechanism oil inlet accumulator 27 and the pulse generating mechanism oil return accumulator 31 meets the oil requirements passing through the servo proportional valve 28, thereby realizing the test under high frequency conditions).

[0034] The pressure regulation and protection mechanism 10 consists of an electromagnetic relief valve 32, a remote pressure regulating valve 33, and a safety valve 34. The pressure regulation and protection mechanism's oil inlet G is connected to the mechanism pipeline, and its oil return port H is connected to the return oil pipeline. The electromagnetic relief valve 32 sets the mechanism's maximum operating pressure, providing primary pressure protection. Pressure within the device is established or unloaded by switching the solenoid in the electromagnetic relief valve 32 on and off. The remote pressure regulating valve 33 is connected to the control port of the electromagnetic relief valve 32, forming a remote pressure regulation circuit. Adjustment of the remote pressure regulating valve 33 allows for different device pressure operating conditions (the pressure within the device after adjustment by the remote pressure regulating valve 33 is less than the maximum operating pressure of the device), facilitating the internal working pressure requirements of the device under different test conditions and improving the operating capacity of the pulse generating mechanism 11. The safety valve 34 is a safety upgrade to the electromagnetic relief valve 32 protection mechanism. The set pressure of the safety valve 34 is slightly higher than that of the electromagnetic relief valve 32, providing secondary pressure protection for the pressure within the device. The pressure regulating protection mechanism 10 facilitates the pressure level regulation of the device so that the safety of the pressure mechanism is protected at multiple levels.

Claims

1. A high-frequency pulse test device, characterized in that: It includes a source oil power mechanism, a pulse generating mechanism and a medium circulation exhaust mechanism connected in sequence; The power source oil tank of the source oil power mechanism is respectively connected to the oil inlet and oil return ends of the pulse generating mechanism, the output end of the pulse generating mechanism is connected to the input end of the medium circulation exhaust mechanism, the oil inlet and oil return ends of the medium circulation exhaust mechanism are respectively connected to the medium source oil tank, and the medium source oil tank is connected to the experimental equipment; The oil inlet end pipeline of the pulse generating mechanism is connected to the oil inlet end of the pressure regulating and protecting mechanism, and the oil return end pipeline of the pulse generating mechanism is connected to the oil return end of the pressure regulating and protecting mechanism; The pulse generating mechanism is composed of an accumulator at the oil inlet of the pulse generating mechanism, a servo proportional valve, a pulse generator, a displacement sensor and an accumulator at the oil return port of the pulse generating mechanism; the accumulator at the oil inlet of the pulse generating mechanism and the accumulator at the oil return port of the pulse generating mechanism are connected in parallel at the oil inlet and oil return port of the servo proportional valve; the accumulator at the oil inlet of the pulse generating mechanism and the accumulator at the oil return port of the pulse generating mechanism are filled with different pressures.

2. The high-frequency pulse test device according to claim 1, characterized in that: The pipeline at the oil inlet end of the pulse generating mechanism is provided with: an oil suction filter, a power source motor pump group and a high-pressure filter in sequence from the pipeline oil inlet; the pipeline at the oil return end of the pulse generating mechanism is provided with a cooler.

3. The high-frequency pulse test device according to claim 1, characterized in that: A pressure sensor is provided on the pipeline between the output end of the pulse generating mechanism and the input end of the medium circulation exhaust mechanism.

4. The high-frequency pulse test device according to claim 1, characterized in that: The pipeline at the oil inlet end of the medium circulation exhaust mechanism is provided with: a medium source motor pump group and a filter in sequence from the pipeline oil inlet; the pipeline at the oil return end of the medium circulation exhaust mechanism is provided with a solenoid valve.

5. The high-frequency pulse test device according to claim 1, characterized in that: A pressure gauge and an accumulator are provided on the pipeline at the oil inlet end of the pressure regulating protection mechanism.

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