Device for testing gas pressure-bearing performance of blanking cap

Abstract

The utility model relates to a blanking cap gas pressure-bearing performance testing device, which comprises a base provided with a testing cavity with an opening at the upper end, and the testing cavity is communicated with a gas inlet and a gas outlet of the base; the upper cover is arranged above the base and is provided with a placement hole corresponding to the test cavity, and a blanking cap placement groove is formed in the upper end of the test cavity; the upper cover is connected with one end of the base through a hinge shaft; the other end of the base is provided with a clamping hole matched with a clamping hook; one end of the movable beam is connected with the hinge shaft, and the other end of the movable beam is connected with the clamping hook; a torsion handle is arranged above the movable beam, and a screw rod of the torsion handle is in threaded connection with the movable beam; the upper cover is provided with a fixing seat fixedly connected with the upper cover, the fixing seat is provided with an inner cavity with a through hole in the upper end, a positioning block is arranged in the inner cavity, and the lead screw penetrates through the through hole in the fixing seat to be connected with the positioning block. The device is easy to operate and low in labor intensity, the test efficiency is improved, potential safety hazards caused by manual pressure relief can be avoided after the test is completed, and the device is safer.

Description

Technical Field

[0001] The utility model discloses a plugging gas pressure bearing performance testing device, belonging to the field of solid engine testing. Background Art

[0002] The plug cap is an important component of a solid rocket engine. It is usually placed upstream of the nozzle near the throat liner. It plays a role in sealing, preventing moisture and isolating foreign matter during daily storage of the engine. At the same time, at the moment of engine ignition, it can ensure that the combustion chamber pressure is quickly established, thereby shortening the ignition delay time and ensuring the combat performance of the ammunition.

[0003] As shown in the figure, the existing pressure test device clamps the plug cover between two steel plates with a test cavity by multiple bolts, and then inflates and pressurizes it for observation from one side. Only one plug cover can be tested each time, and its defects are that the test efficiency is seriously insufficient; each test requires workers to move the steel plates, which is inefficient and labor-intensive; during the test, the steel plates are easy to damage the surface of the plug cover, and after the test is completed, the bolts need to be slowly removed to relieve the pressure in the test cavity. There are certain safety hazards in the manual pressure relief operation. Summary of the invention

[0004] The utility model aims to provide a plugging gas pressure bearing performance test device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including: a base, a test cavity with an upper opening on the base, the test cavity is communicated with the air inlet and the air discharge port on the base; an upper cover is arranged above the base and has a placement hole corresponding to the test cavity, and a plugging cover placement groove is arranged between the placement hole and the test cavity; the upper cover is connected to one end of the base by a hinge shaft; the side surface at another position of the base is provided with a card hole, and a card hook can cooperate with it; a movable beam is arranged on the upper cover, one end of which is connected to the hinge shaft, and the other end is connected to the card hook; a torque handle is arranged above the movable beam, and a screw connected to the torque handle passes through the movable beam and is connected to the movable beam by a thread; a fixed seat fixedly connected to the upper cover is arranged, and the fixed seat is provided with an inner cavity of an upper through hole, and a positioning block is arranged in the inner cavity, and the lateral dimension of the positioning block is larger than the dimension of the through hole on the fixed seat, and the screw passes through the through hole on the fixed seat and is connected to the positioning block.

[0006] Furthermore, there are vents between adjacent test chambers.

[0007] Furthermore, a gasket is provided on the upper surface of the positioning block.

[0008] Furthermore, the hook is connected to the movable beam through a pin shaft, and an opening and closing handle is provided on the outer side of the hook.

[0009] Furthermore, the blocking cover placement groove is arranged on the base, in which a sealing ring is installed; and a sealing gasket is arranged on the lower surface of the upper cover.

[0010] The beneficial effects achieved by the utility model are:

[0011] Four test chambers are arranged on the base, and vent holes are provided between the test chambers to make the chambers interconnected, so that four plugging covers can be tested at one time; the upper cover can be opened and closed through the movable beam and the mounting seat, and the operation is convenient when in use; after closing the upper cover, the upper cover can be pressed by the torque handle, and the sealing gasket at the lower end of the upper cover can quickly achieve the sealing of the plugging cover, thereby improving the test efficiency;

[0012] By providing a sealing pad and a sealing ring, the sealing between the placement hole and the test cavity can be ensured during the test; by providing the placement hole, damage to the plugging cover surface caused by squeezing can be avoided;

[0013] An air vent is provided at the front end of the base, and the test chamber can be depressurized through the air vent after the test is completed, avoiding safety hazards caused by excessive pressure when removing the plugging cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an existing pressure test device;

[0015] Figure 2 A three-dimensional diagram of an embodiment of the utility model;

[0016] Figure 3 for Figure 2 A three-dimensional diagram of the upper cover in a closed state;

[0017] Figure 4 for Figure 3 The main view of

[0018] Figure 5 for Figure 4 A partial enlarged view of the middle part;

[0019] Figure 6 for Figure 3 Right view of;

[0020] Figure 7 for Figure 3 Left view of;

[0021] Figure 8 for Figure 3 A top view of

[0022] Among them, 1. base, 2. upper cover, 3. test chamber, 4. vent, 5. air inlet, 6. air release port, 7. placement hole, 8. plugging cover placement slot, 9. sealing ring, 10. mounting seat, 11. clamping hole, 12. clamping hook, 13. movable beam, 14. opening and closing handle, 15. torque handle, 16. screw, 17. fixing seat, 18. positioning block, 19. gasket, 20. limit pin, 21. sealing gasket. DETAILED DESCRIPTION

[0023] by Figure 4 The up, down, left, right, front and back directions of this embodiment are defined as shown.

[0024] As shown in the figure, this embodiment includes a base 1, on which a group of test chambers are arranged. In this embodiment, four test chambers 3 are arranged, and the upper ends of the test chambers 3 are open. When in use, four plugging covers can be subjected to pressure tests at the same time. Each test chamber 3 is provided with a vent hole 4 for connecting adjacent test chambers 3. When in use, the pressure in each test chamber 3 can be ensured to be consistent. A plugging cover placement groove 8 is arranged at the upper end of each test chamber 3. The shape of the plugging cover placement groove 8 corresponds to the plugging cover, which can limit the plugging cover; a sealing ring 9 is arranged above the plugging cover placement groove 8, which can ensure the seal between the plugging cover and the test chamber 3 during the test. An air inlet 5 is arranged at the front end of the base 1, and the air inlet 5 is connected to the test chamber 3, so that gas can be fed into the test chamber 3; a gas discharge port 6 is arranged on the right side of the air inlet 5, and the gas discharge port 6 is connected to the test chamber 3. After the test is completed, the gas in the test chamber 3 can be discharged.

[0025] In this embodiment, both the air inlet 5 and the air outlet 6 are provided with valves, and the opening and closing of the air inlet 5 and the air outlet 6 can be manually controlled.

[0026] The right end of the base 1 is provided with a clamping hole 11, and the left end is provided with a mounting seat 10; the upper end of the mounting seat 10 is connected to a movable beam 13 through a hinge shaft, and the left end of the movable beam 13 can be rotatably connected to the mounting seat 10 through the hinge shaft. A clamping hook 12 is provided at the right end of the movable beam 13, and the upper end of the clamping hook 12 is rotatably connected to the movable beam 13 through a hinge shaft, and the lower end matches the clamping hole 11 and can be clamped in the clamping hole 11. An opening and closing handle 14 is provided on the right side of the clamping hook 12, and when in use, the clamping hook 12 is swung left and right by controlling the opening and closing handle 14. A torque handle 15 is provided in the middle of the movable beam 13, and a lead screw 16 extends from the lower end of the torque handle 15. The outer periphery of the lead screw 16 is provided with a thread, passes through the movable beam 13 and is connected to the movable beam 13 through a thread. An upper cover 2 is arranged below the torque handle 15; a fixing seat 17 is arranged at the upper end of the upper cover 2, and the fixing seat 17 is fixedly connected to the upper cover 2 by bolts; an inner cavity is arranged in the fixing seat 17, and a positioning block 18 is arranged in the inner cavity; a through hole is opened at the upper end of the inner cavity, and the lateral size of the positioning block 18 is larger than the size of the through hole on the fixing seat 17. The lead screw 16 is fixedly connected to the positioning block 18 through the through hole, and when in use, the upper cover 2 can be controlled to move up and down by rotating the torque handle 15. A gasket 19 is arranged at the contact position between the fixing seat 17 and the positioning block 18, which can avoid abrasion and wear of the contact surface between the fixing seat 17 and the fixing block 18, and can also increase the contact surface between the positioning block 18 and the fixing seat 17, thereby improving the pressure bearing capacity of the positioning block 18. Limiting pins 20 are arranged at the left and right ends of the torque handle 15, and the lower end of the limiting pin 20 is fixedly connected to the upper cover 2 by welding, and the upper end passes through the movable beam 13, and is slidably connected to the movable beam 13, and plays a role of limiting guide when the torque handle 15 is rotated. The upper cover 2 is provided with a placement hole 7, which corresponds to the test cavity 3. During the test, it is possible to determine whether the end cover is deformed through the placement hole 7. A sealing gasket 21 is provided at the lower end of the upper cover 2, which can protect the plug cover when tightening the upper cover 2 to avoid damaging the plug cover surface during the pressing and sealing process.

[0027] When conducting the plugging cover gas pressure test, place the plugging cover in the plugging cover placement slot 8, pull the opening and closing handle 14 to the right, and press the movable beam 13 downward to close the upper cover 2 and the base 1. Then push the opening and closing handle 14 to place the hook 12 into the clamping hole 11. After completion, turn the torque handle 15 and push the upper cover 2 downward to seal the plugging cover and the test chamber 3. After sealing, open the valve of the air inlet 5. At this time, the valve of the air vent 6 is in a closed state, and the gas enters the test chamber 3 to conduct the gas pressure test. After completion, close the valve of the air inlet 5, open the valve of the air vent 6, and discharge the gas in the test chamber 3. After reaching the normal atmospheric pressure, close the valve of the air vent 6, turn the torque handle 15 to pull the upper cover 2 upward, pull the opening and closing handle 14 to the right to pull out the hook 12, then open the upper cover 2, and then take out the tested plugging cover to complete the capping gas pressure test.

Claims

1. A plugging gas pressure bearing performance test device, comprising: A base, wherein a test cavity with an upper opening is arranged on the base, and the test cavity is communicated with an air inlet and an air discharge port on the base; an upper cover is arranged above the base and has a placement hole corresponding to the test cavity, and a plugging cover placement groove is arranged between the placement hole and the test cavity; its characteristics are: the upper cover is connected to one end of the base through a hinge shaft; the side surface of the base at another position is provided with a card hole, and a card hook can cooperate with it; a movable beam is arranged on the upper cover, one end of which is connected to the hinge shaft, and the other end is connected to the card hook; a torque handle is arranged above the movable beam, and a screw connected to the torque handle passes through the movable beam and is connected to the movable beam by a thread; a fixed seat fixedly connected to the upper cover is arranged, and the fixed seat is provided with an inner cavity of an upper through hole, and a positioning block is arranged in the inner cavity, and the lateral dimension of the positioning block is larger than the dimension of the through hole on the fixed seat, and the screw passes through the through hole on the fixed seat and is connected to the positioning block.

2. The gas pressure bearing performance test device for plugging and covering according to claim 1 is characterized in that: There are ventilation holes between adjacent test chambers.

3. The gas pressure bearing performance test device for plugging and covering according to claim 1 or 2 is characterized in that: A gasket is arranged on the upper surface of the positioning block.

4. The gas pressure bearing performance test device for plugging and covering according to claim 1 or 2 is characterized in that: The hook is connected with the movable beam through a shaft, and an opening and closing handle is arranged on the outer side of the hook.

5. The gas pressure bearing performance test device for plugging and covering according to claim 1 or 2 is characterized in that: The blocking cover placement groove is arranged on the base, in which a sealing ring is installed; and a sealing gasket is arranged on the lower surface of the upper cover.

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