A rupture disc fatigue testing device

Abstract

The utility model relates to a rupture disk fatigue testing device. The utility model discloses a workbench, is provided with the compacting mechanism on the workbench, is provided with the rupture disk fixing mechanism on the compacting mechanism, is still provided with the testing mechanism on the compacting mechanism, the utility model discloses the testing mechanism, through the high pressure pump, the helium gas in helium gas storage tank is pressurized to high pressure helium, adjusts again through the pressure regulating valve, after the air pressure adjustment, helium gas enters the pressurizing groove in the pressurizing pipeline, makes the pressurizing groove to be filled with helium gas, and helium gas carries out pressure test to the rupture disk, can carry out the burst test to the rupture disk through the helium gas of different air pressure, and the helium mass spectrum detector is used to detect the leakage of the rupture disk in the testing process.

Description

Technical Field

[0001] This utility model relates to the field of rupture disc burst pressure testing technology, and specifically to a rupture disc fatigue testing device. Background Technology

[0002] Rupture discs are widely used safety devices in boilers, pressure vessels, and pressure piping systems in chemical, petrochemical, oil refining, metallurgical, pharmaceutical, food, energy, and power industries. Their applications primarily involve high-pressure, flammable, explosive, and toxic media, with stringent operating conditions, mostly in chemical reaction processes. These processes are prone to rapid pressure fluctuations or violent chemical reactions that could lead to explosions. Due to the special nature of the media, leakage is generally unacceptable in these processes. In the event of an accident, the safety relief device must have extremely high dynamic response and sufficient discharge capacity to prevent serious damage to equipment and the surrounding environment. Alternatively, rupture discs may be necessary when the equipment operates at high temperatures, making safety valves unsuitable.

[0003] Therefore, rupture discs are required to be suitable for applications involving rapid phase change overpressure, gas-phase chemical combustion overpressure, and dust combustion overpressure, where large emissions are required. Rupture discs are typically manufactured in various specifications with diameters ranging from 5-1500 mm and burst pressures from 0.001-500 MPa to meet diverse discharge requirements. However, most existing testing equipment cannot quickly adjust the pressure during rupture disc testing, leading to discs that deviate from preset pressure values. This results in substandard rupture discs being sold, compromising their subsequent proper venting function. Given these shortcomings, it is necessary to design a rupture disc fatigue testing device. Utility Model Content

[0004] The purpose of this invention is to provide a rupture disc fatigue testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rupture disc fatigue testing device, including a workbench, a clamping mechanism on the workbench, a rupture disc fixing mechanism on the clamping mechanism, and a testing mechanism on the clamping mechanism.

[0006] Preferably, the clamping mechanism includes an upper clamping plate and a lower clamping plate. The upper clamping plate is installed at the bottom of the lifting plate. The lifting plate is connected to one end of a threaded rod via a bearing. A handwheel is installed at the other end of the threaded rod, and a nut is screwed into the middle of the threaded rod.

[0007] Preferably, the nut is mounted on a fixed plate, the fixed plate is mounted on a workbench via several support columns, and a sliding sleeve is fitted on the support columns and mounted on a lifting plate.

[0008] Preferably, a protrusion is installed at the bottom of the upper pressing plate, the protrusion and the upper pressing plate are integrally formed, and an upwardly recessed rupture disc receiving groove is opened on the protrusion. A sealing ring is installed in the rupture disc receiving groove. A lower pressing plate is provided below the upper pressing plate and is installed on the worktable.

[0009] Preferably, the rupture disc fixing mechanism includes a rupture disc fixing plate, which is mounted on the lower clamping plate. The rupture disc fixing plate has a rupture disc contour groove, and a pressure groove is formed at the bottom of the rupture disc contour groove. A sealing ring II is installed in the pressure groove, and a pressure sensor is installed at the bottom of the rupture disc contour groove.

[0010] Preferably, the testing mechanism includes a helium mass spectrometer, a helium storage tank, and a pressure sensor. The helium mass spectrometer is connected to the rupture disc receiving tank through an external leakage detection tube. The helium storage tank is connected to the pressurization tank through a pressurization pipeline. The pressurization pipeline is equipped with a pressure regulating valve for adjusting the helium pressure and a pressure gauge for detecting the helium pressure.

[0011] Preferably, a booster pump is connected to the pressurization pipeline, the pressurization tank is connected to the venting pipe, a venting valve is installed on the venting pipe, the venting pipe is connected to the helium buffer tank, and the helium buffer tank is connected to the helium recovery gasbag.

[0012] Compared with the prior art, the technical solution provided by this utility model has at least the following technical effects or advantages:

[0013] This utility model is equipped with a pressing mechanism and a rupture disc fixing mechanism. By rotating the handwheel counterclockwise, the counterclockwise threaded rod is driven to rotate. Since the threaded rod is engaged with the nut, the threaded rod moves downward, thereby driving the lifting plate to move downward, and then driving the upper pressing plate to move downward, so that the protrusion on the upper pressing plate presses against the rupture disc fixing plate. At this time, a receiving cavity for rupture disc is formed between the rupture disc receiving groove and the rupture disc conforming groove of the rupture disc fixing plate. The rupture disc is fixed between the rupture disc receiving groove and the rupture disc conforming groove of the rupture disc fixing plate, thereby fixing the rupture disc.

[0014] This invention improves the sealing performance between the rupture disc and the receiving cavity by having a sealing ring one in the rupture disc receiving groove contact the upper surface of the rupture disc, and a sealing ring two in the rupture disc conforming groove contact the lower surface of the rupture disc. This enhances the sealing performance and improves test accuracy. The invention includes a testing mechanism that uses a high-pressure pump to pressurize helium in a helium storage tank to high pressure, and then adjusts the pressure using a pressure regulating valve. After pressure adjustment, the helium enters the pressurizing tank through a pressurizing pipe, filling the tank with helium. The helium then performs a pressure test on the rupture disc. The rupture disc can be tested using helium at different pressures. During the test, a helium mass spectrometer is used to detect any external leakage of the rupture disc. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the upper pressing plate structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the rupture disc fixing mechanism in this utility model.

[0019] In the attached image:

[0020] 1. Workbench; 2. Clamping mechanism; 201. Upper clamping plate; 202. Lower clamping plate; 203. Lifting plate; 204. Bearing; 205. Threaded rod; 206. Handwheel; 207. Nut; 208. Fixing plate; 209. Support column; 210. Sliding sleeve; 211. Protrusion; 212. Rupture disc receiving groove; 213. Sealing ring one; 3. Rupture disc fixing mechanism; 301. Rupture disc fixing plate; 302. Rupture disc contour groove; 303. Pressurization groove; 304. Sealing ring two; 305. Pressure sensor; 4. Testing mechanism; 401. Helium mass spectrometer; 402. Helium storage tank; 403. Vent pipe; 404. External leakage detection pipe; 405. Pressurization pipeline; 406. Pressure regulating valve; 407. Pressure gauge; 408. Booster pump. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] Please see Figure 1-3As shown, this utility model provides a technical solution: a rupture disc fatigue testing device, including a workbench 1, a clamping mechanism 2 on the workbench 1, a rupture disc fixing mechanism 3 on the clamping mechanism 2, and a testing mechanism 4 on the clamping mechanism 2.

[0023] The clamping mechanism 2 in this embodiment includes an upper clamping plate 201 and a lower clamping plate 202. The upper clamping plate 201 is installed at the bottom of the lifting plate 203. The lifting plate 203 is connected to one end of a threaded rod 205 via a bearing 204. A handwheel 206 is installed at the other end of the threaded rod 205. A nut 207 is screwed into the middle of the threaded rod 205. The nut 207 is installed on a fixed plate 208. The fixed plate 208 is installed on the workbench 1 via several support columns 209. The upper sleeve is provided with a sliding sleeve 210, which is installed on the lifting plate 203. The bottom of the upper pressing plate 201 is provided with a protrusion 211, which is integrated with the upper pressing plate 201. The protrusion 211 has an upwardly recessed rupture disc receiving groove 212, which has a convex shape. A sealing ring 213 is installed in the rupture disc receiving groove 212. A lower pressing plate 202 is provided below the upper pressing plate 201 and is installed on the worktable 1.

[0024] The rupture disc fixing mechanism 3 in this embodiment includes a rupture disc fixing plate 301, which is mounted on a lower clamping plate 202. The rupture disc fixing plate 301 and the lower clamping plate 202 are integrally formed. A rupture disc contour groove 302 is provided on the rupture disc fixing plate 301. A pressure groove 303 is provided at the bottom of the rupture disc contour groove 302. A sealing ring 304 is installed in the pressure groove 303. A pressure sensor 305 is installed at the bottom of the rupture disc contour groove 302. The pressure sensor 305 is used to detect the pressure on the rupture disc.

[0025] The testing mechanism 4 in this embodiment includes a helium mass spectrometer 401 and a helium storage tank 402. The helium mass spectrometer 401 is connected to the rupture disc receiving slot 212 through an external leakage detection tube 404. The helium storage tank 402 is connected to the pressurization tank 303 through a pressurization pipe 405. The pressurization pipe 405 is equipped with a pressure regulating valve 406 for adjusting the helium pressure and a pressure gauge 407 for detecting the helium pressure. A booster pump 408 is connected to the pressurization pipe 405. The pressurization tank 303 is connected to a vent pipe 403. A vent valve is installed on the vent pipe 403. The vent pipe 403 is connected to a helium buffer tank. The helium buffer tank is connected to a helium recovery gasbag.

[0026] The working principle of this utility model is as follows: A positively arched or negatively arched rupture disc is placed in the rupture disc conformal groove 302. The handwheel 206 is rotated counterclockwise, causing the counterclockwise threaded rod 205 to rotate. Since the threaded rod 205 engages with the nut 207, it moves downwards, thereby causing the lifting plate 203 to move downwards, which in turn causes the upper pressing plate 201 to move downwards. This causes the protrusion 211 on the upper pressing plate 201 to press against the rupture disc fixing plate 301. At this time, the rupture disc receiving groove 2... A cavity for accommodating the rupture disc is formed between the rupture disc receiving groove 212 of the protrusion 211 and the rupture disc conforming groove 302 of the rupture disc fixing plate 301. The rupture disc is fixed between the rupture disc receiving groove 212 of the protrusion 211 and the rupture disc conforming groove 302. The sealing ring 213 in the rupture disc receiving groove 212 contacts the upper surface of the rupture disc, and the sealing ring 304 in the rupture disc conforming groove 302 contacts the lower surface of the rupture disc, ensuring the sealing between the rupture disc and the receiving cavity, which helps to improve the accuracy of the test.

[0027] Helium in helium storage tank 402 is pressurized to high pressure by a high-pressure pump, and then regulated by a pressure regulating valve 406. After pressure regulation, helium enters pressurization tank 303 through pressurization pipeline 405, filling pressurization tank 303 with helium. Helium is used to perform a pressure test on the rupture disc. During the test, a helium mass spectrometer 401 is used to detect and record the external leakage of the rupture disc. The helium mass spectrometer 401 can directly display the external leakage amount. When the external leakage amount is within the preset allowable range, it is considered that there is no leakage, thus the sealing performance of the rupture disc can be tested.

[0028] Close the pressure regulating valve 406, then open the vent valve to release the gas into the helium buffer tank. After being buffered by the helium buffer tank, the gas is released into the helium recovery bag. This is one cycle. Repeat the above operation to conduct burst tests on the rupture disc using helium at different pressures. After several cycles, remove the rupture disc and observe it to determine the fatigue resistance of the rupture disc under different pressures.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A rupture disc fatigue testing device, characterized in that: It includes a workbench (1), a clamping mechanism (2) is provided on the workbench (1), a rupture disc fixing mechanism (3) is provided on the clamping mechanism (2), and a testing mechanism (4) is also provided on the clamping mechanism (2).

2. The rupture disc fatigue testing device according to claim 1, characterized in that: The clamping mechanism (2) includes an upper clamping plate (201) and a lower clamping plate (202). The upper clamping plate (201) is installed at the bottom of the lifting plate (203). The lifting plate (203) is connected to one end of the threaded rod (205) through a bearing (204). A handwheel (206) is installed at the other end of the threaded rod (205). A nut (207) is screwed into the middle of the threaded rod (205).

3. The rupture disc fatigue testing device according to claim 2, characterized in that: The nut (207) is installed on the fixed plate (208), and the fixed plate (208) is installed on the workbench (1) by a number of support columns (209). A sliding sleeve (210) is sleeved on the support column (209), and the sliding sleeve (210) is installed on the lifting plate (203).

4. The rupture disc fatigue testing device according to claim 3, characterized in that: The bottom of the upper pressing plate (201) is equipped with a protrusion (211), which is integrated with the upper pressing plate (201). The protrusion (211) has an upwardly recessed rupture disc receiving groove (212), and a sealing ring (213) is installed in the rupture disc receiving groove (212). A lower pressing plate (202) is provided below the upper pressing plate (201), and the lower pressing plate (202) is installed on the workbench (1).

5. The rupture disc fatigue testing device according to claim 1, characterized in that: The rupture disc fixing mechanism (3) includes a rupture disc fixing plate (301), which is installed on the lower clamping plate (202). A rupture disc contour groove (302) is provided on the rupture disc fixing plate (301), and a pressure groove (303) is provided at the bottom of the rupture disc contour groove (302). A sealing ring II (304) is installed in the pressure groove (303), and a pressure sensor (305) is installed at the bottom of the rupture disc contour groove (302).

6. The rupture disc fatigue testing device according to claim 1, characterized in that: The testing mechanism (4) includes a helium mass spectrometer (401), a helium storage tank (402), and a pressure sensor (305). The helium mass spectrometer (401) is connected to the rupture disc receiving tank (212) through an external leakage detection tube (404). The helium storage tank (402) is connected to the pressurization tank (303) through a pressurization pipe (405). The pressurization pipe (405) is equipped with a pressure regulating valve (406) for adjusting the helium pressure and a pressure gauge (407) for detecting the helium pressure.

7. The rupture disc fatigue testing device according to claim 6, characterized in that: A booster pump (408) is connected to the pressurization pipe (405), the pressurization tank (303) is connected to the vent pipe (403), a vent valve is installed on the vent pipe (403), the vent pipe (403) is connected to the helium buffer tank, and the helium buffer tank is connected to the helium recovery airbag.

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