Vibration testing device for low-temperature valve

Abstract

The utility model discloses a low-temperature valve vibration testing device which comprises a supporting piece used for supporting and fixing, a first hydraulic rod is installed on the upper wall of the supporting piece, a testing frame is installed at the movable end of the first hydraulic rod, the testing frame is movably arranged in the supporting piece, a second hydraulic rod is installed on the upper wall in the testing frame, and the second hydraulic rod is installed on the lower wall of the testing frame. The movable end of the second hydraulic rod is provided with an upper test fixing assembly, the bottom wall of the test frame is provided with a lower test fixing assembly, the lower test fixing assembly is arranged under the upper test fixing assembly, the bottom wall of the lower test fixing assembly is provided with a first spring, and the lower end of the first spring is connected with the bottom wall of the test frame. The utility model relates to the technical field of low-temperature valve testing, in particular to a vibration testing device for a low-temperature valve, which can test the air tightness of the low-temperature valve in a vibration state.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic valve testing, in particular to a cryogenic valve vibration testing device. Background Art

[0002] Cryogenic valves are suitable for use with very low media temperatures, generally ranging from -40°C to -196°C. They are primarily used in piping systems carrying flammable and easily vaporized media at room temperature, such as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, and liquefied petroleum products. Currently, cryogenic valves require performance testing after manufacture. However, existing testing equipment typically only tests the airtightness of the valve body in a fixed position. In actual use, existing cryogenic valves are often subject to vibration caused by the flow resistance of the media and external excitation. This can lead to discrepancies between actual performance and test results, posing safety risks. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a low-temperature valve vibration test device, which can perform air tightness test on the low-temperature valve in a vibrating state.

[0004] The technical solution adopted by the present invention is as follows: a low-temperature valve vibration testing device, comprising a support member for supporting and fixing, a hydraulic rod 1 being installed on the upper wall of the support member, a test frame being installed on the movable end of the hydraulic rod 1, the test frame being movably arranged in the support member, a hydraulic rod 2 being installed on the upper wall of the test frame, an upper test fixing assembly being installed on the movable end of the hydraulic rod 2, a lower test fixing assembly being installed on the bottom wall of the test frame, the lower test fixing assembly being arranged directly below the upper test fixing assembly, a spring 1 being installed on the bottom wall of the lower test fixing assembly, and the lower end of the spring 1 being connected to the bottom wall of the test frame.

[0005] Preferably, the upper test fixing assembly and the lower test fixing assembly have the same structure, and only one group is introduced here. The lower test fixing assembly includes a mounting piece, the mounting piece on the lower test fixing assembly is connected to the upper end of spring one, and the mounting piece on the upper test fixing assembly is connected to the movable end of hydraulic rod two. A slot is provided at the center of the mounting piece, and spring two and telescopic rod are installed in the slot. The upper end of spring two and the upper end of the telescopic rod are connected with a fixing piece, and a fixing groove is provided on the upper wall of the fixing piece, and the lower end of the low-temperature valve is clamped in the fixing groove.

[0006] Among them, a folding part is installed between the bottom wall of the slot and the bottom wall of the fixing part, the telescopic rod and the second spring are both arranged in the folding part, and a sealed chamber is formed between the folding part, the fixing part and the bottom wall of the slot, the bottom wall of the slot is provided with multiple groups of ventilation holes for gas circulation, and the mounting part is provided with multiple groups of ventilation pipes for gas circulation, the lower end of the ventilation pipe is connected with the ventilation hole, the upper end of the ventilation pipe is arranged through the upper wall of the mounting part, and the upper end of the ventilation pipe is provided with a control valve to facilitate the control of the circulation of gas in the ventilation pipe.

[0007] Furthermore, an elastic member is installed on the side wall of the slot, and multiple groups of ventilation pipes 2 are also provided in the installation member. The other end of the ventilation pipe 1 is connected to one end of the ventilation pipe 2, and the other end of the ventilation pipe 2 is connected to the elastic member.

[0008] Preferably, an inflator is provided on the upper wall of the mounting part of the upper test fixing assembly, and a folding tube is connected to the air outlet of the inflator. The folding tube passes through the mounting part, the card slot, and the fixing part in sequence. A pressure sensor is provided on the bottom wall of the fixing part on the upper test fixing assembly, and the upper end of the low-temperature valve is clamped in the fixing groove. At this time, the air outlet and the pressure sensor of the folding tube are both arranged in the low-temperature valve.

[0009] As a preferred embodiment of the present invention, the inner side wall and the bottom wall of the fixing groove are both provided with elastic rubber pads to facilitate sealing the low-temperature valve.

[0010] After adopting the above structure, the beneficial effects of the utility model are as follows: the upper test assembly and the lower test assembly seal and fix the upper and lower ends of the low-temperature valve respectively. While fixing, the elastic part can clamp and fix the low-temperature valve to prevent the position of the low-temperature valve from shifting during testing. The hydraulic rod 1 and the spring 1 can shake the test frame to facilitate vibration testing of the low-temperature valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0012] Figure 1 This is a schematic diagram of the overall structure of a cryogenic valve vibration testing device proposed in the present invention;

[0013] Figure 2 This is a three-dimensional diagram of a low-temperature valve vibration testing device proposed by the utility model;

[0014] Figure 3 This is a front sectional view of a cryogenic valve vibration testing device proposed by the present invention;

[0015] Figure 4 for Figure 3A local enlarged view of point A;

[0016] Figure 5 This is a left sectional view of a cryogenic valve vibration testing device proposed by the present invention;

[0017] Figure 6 for Figure 5 A local enlarged view of point B.

[0018] In the accompanying drawings: 1. support member, 2. hydraulic rod 1, 3. test frame, 4. hydraulic rod 2, 5. upper test fixing assembly, 6. lower test fixing assembly, 7. spring 1, 8. mounting member, 9. slot, 10. spring 2, 11. telescopic rod, 12. fixing member, 13. fixing slot, 14. folding member, 15. vent, 16. vent pipe 1, 17. elastic member, 18. vent pipe 2, 19. inflator, 20. folding tube, 21. pressure sensor, 22. elastic rubber pad. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0021] like Figures 1-6As shown, a low-temperature valve vibration test device includes a support member 1 for supporting and fixing, a hydraulic rod 2 is installed on the upper wall of the support member 1, and a test frame 3 is installed on the movable end of the hydraulic rod 2. The test frame 3 is movably arranged in the support member 1, and a hydraulic rod 2 4 is installed on the upper wall of the test frame 3, and an upper test fixing component 5 is installed on the movable end of the hydraulic rod 2 4. The bottom wall of the test frame 3 is installed with a lower test fixing component 6, and the lower test fixing component 6 is arranged directly below the upper test fixing component 5. The upper and lower ends of the low-temperature valve to be tested are respectively clamped in the upper test fixing component 5 and the lower test fixing component 6, and the bottom wall of the lower test fixing component 6 is installed with a spring 7. The lower end of the spring 7 is connected to the bottom wall of the test frame 3. The setting of the spring 7 can support the lower test fixing component 6, which is convenient for vibration testing of the low-temperature valve.

[0022] The upper test fixing assembly 5 and the lower test fixing assembly 6 have the same structure. Only one group is introduced here. The lower test fixing assembly 6 includes a mounting part 8. The mounting part 8 on the lower test fixing assembly 6 is connected to the upper end of the spring 1 7. The mounting part 8 on the upper test fixing assembly 5 is connected to the movable end of the hydraulic rod 2 4. A card slot 9 is provided at the center of the mounting part 8. The spring 2 10 and the telescopic rod 11 are installed in the card slot 9. The upper end of the spring 2 10 and the upper end of the telescopic rod 11 are connected with a fixing part 12. The upper wall of the fixing part 12 is provided with a fixing groove 13. The lower end of the low-temperature valve is clamped in the fixing groove 13. The inner side wall and the bottom wall of the fixing groove 13 are provided with elastic rubber pads 22 to facilitate sealing the low-temperature valve.

[0023] A folding piece 14 is installed between the bottom wall of the slot 9 and the bottom wall of the fixing piece 12. The telescopic rod 11 and the spring 10 are both arranged in the folding piece 14. A sealed chamber is formed between the folding piece 14, the fixing piece 12 and the bottom wall of the slot 9. The bottom wall of the slot 9 is provided with multiple groups of ventilation holes 15 for gas circulation. The mounting piece 8 is provided with multiple groups of ventilation pipes 16 for gas circulation. The lower end of the ventilation pipe 16 is connected with the ventilation hole 15, and the upper end of the ventilation pipe 16 is arranged through the upper wall of the mounting piece 8. The upper end of the ventilation pipe 16 is provided with a control valve to facilitate control of the circulation of gas in the ventilation pipe 16.

[0024] An elastic part 17 is installed on the side wall of the slot 9, and a plurality of ventilation pipes 18 are also provided in the mounting part 8. The other end of the ventilation pipe 16 is connected with one end of the ventilation pipe 2 18, and the other end of the ventilation pipe 2 18 is connected with the elastic part 17. When the fixing part 12 moves down along the slot 9, the spring 2 10, the telescopic rod 11 and the folding bag are squeezed, and the gas in the folding bag enters the ventilation pipe 1 16 through the vent hole 15, the control valve is locked, the gas is discharged, and then the control valve is closed. The gas in the ventilation pipe 16 enters the elastic part 17 through the ventilation pipe 2 18, and the elastic part 17 bulges to fix the low-temperature valve.

[0025] An inflator 19 is provided on the upper wall of the mounting part 8 of the upper test fixing assembly 5, and a folding tube 20 is connected to the air outlet of the inflator 19. The folding tube 20 passes through the mounting part 8, the card slot 9, and the fixing part 12 in sequence. A pressure sensor 21 is provided on the bottom wall of the fixing part 12 on the upper test fixing assembly 5, and the upper end of the low-temperature valve is clamped in the fixing groove 13. At this time, the air outlet of the folding tube 20 and the pressure sensor 21 are both arranged in the low-temperature valve.

[0026] When it is used specifically, when testing is required, the hydraulic rod 24 works to drive the upper test fixing assembly 5 to lift, and the lower end of the cryogenic valve to be tested is placed in the fixing groove 13 of the lower test fixing assembly 6. The hydraulic rod 24 works to drive the upper test fixing assembly 5 to move downward, and the fixing piece 12 on the upper test fixing assembly 5 moves downward until the upper end of the cryogenic valve is clamped in the fixing groove 13 on the upper test fixing assembly 5. At this time, the air outlet of the folding tube 20 and the pressure sensor 21 are both arranged in the cryogenic valve, and the hydraulic rod 24 continues to work to push the upper test fixing assembly 5. The mounting member 8 on the upper part continues to move downward, the upper end of the cryogenic valve pushes the fixing member 12 to move upward along the card slot 9, and the lower end of the cryogenic valve pushes the fixing member 12 to move downward along the card slot 9. When the fixing member 12 moves up and down along the card slot 9, it squeezes the spring 2 10, the telescopic rod 11 and the folding bag. The gas in the folding bag enters the vent pipe 1 16 through the vent hole 15, the control valve is locked, the gas is discharged, and then the control valve is closed. The gas in the vent pipe 1 16 enters the elastic member 17 through the vent pipe 2 18, and the elastic member 17 bulges to fix the cryogenic valve.

[0027] The inflator 19 inflates the cryogenic valve through the folding tube 20. The pressure sensor 21 is used to detect the pressure change inside the cryogenic valve. After standing for a period of time, the result is recorded. Then the hydraulic rod 12 works to drive the test frame 3 and the cryogenic valve fixed inside to vibrate, and the pressure sensor 21 continues to detect the pressure change inside the cryogenic valve.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by the present invention and, without departing from the purpose of the present invention, design structures and embodiments similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A cryogenic valve vibration test device, comprising a support member for supporting and fixing, a hydraulic rod 1 being mounted on the upper wall of the support member, a test frame being mounted on the movable end of the hydraulic rod 1, the test frame being movably disposed within the support member, and a hydraulic rod 2 being mounted on the upper wall of the test frame, characterized in that: The movable end of the hydraulic rod 2 is installed with an upper test fixing assembly, the bottom wall of the test frame is installed with a lower test fixing assembly, the lower test fixing assembly is arranged directly below the upper test fixing assembly, the bottom wall of the lower test fixing assembly is installed with a spring 1, and the lower end of the spring 1 is connected to the bottom wall of the test frame.

2. A cryogenic valve vibration testing device according to claim 1, characterized in that: The lower test fixing assembly includes a mounting piece, the mounting piece on the lower test fixing assembly is connected to the upper end of spring one, and the mounting piece on the upper test fixing assembly is connected to the movable end of hydraulic rod two. A slot is provided at the center position of the mounting piece, and spring two and a telescopic rod are installed in the slot. The upper end of spring two and the upper end of the telescopic rod are connected with a fixing piece, and a fixing slot is provided on the upper wall of the fixing piece.

3. A cryogenic valve vibration testing device according to claim 2, characterized in that: A folding part is installed between the bottom wall of the slot and the bottom wall of the fixing part. The telescopic rod and the second spring are both arranged in the folding part. The bottom wall of the slot is provided with multiple groups of ventilation holes for gas circulation. The mounting part is provided with multiple groups of ventilation pipes for gas circulation. The lower end of the ventilation pipe is connected with the ventilation hole, and the upper end of the ventilation pipe is arranged through the upper wall of the mounting part. The upper end of the ventilation pipe is provided with a control valve.

4. A cryogenic valve vibration testing device according to claim 3, characterized in that: An elastic member is installed on the side wall of the slot, and multiple groups of ventilation pipes 2 are also provided in the installation member. The other end of the ventilation pipe 1 is connected to one end of the ventilation pipe 2, and the other end of the ventilation pipe 2 is connected to the elastic member.

5. A cryogenic valve vibration testing device according to claim 4, characterized in that: An inflator is provided on the upper wall of the mounting part of the upper test fixing assembly, and a folding tube is connected to the air outlet of the inflator. The folding tube passes through the mounting part, the slot, and the fixing part in sequence. A pressure sensor is provided on the bottom wall of the fixing part on the upper test fixing assembly.

6. A cryogenic valve vibration testing device according to claim 5, characterized in that: The inner side wall and the bottom wall of the fixing groove are both provided with elastic rubber pads.

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