Testing device for ultrahigh-pressure rupture disk and manufacturing method of testing device

Abstract

The invention discloses a testing device for an ultrahigh-pressure rupture disk and a manufacturing method of the testing device, and relates to the technical field of ultrahigh-pressure rupture disk manufacturing. The testing device for the ultrahigh-pressure rupture disk comprises a pressurization mechanism, a clamping mechanism and an experiment cabinet, a lower flange is assembled at the top of the experiment cabinet, an upper flange is connected to the upper portion of the lower flange through bolts, and a gap is formed between the upper flange and the lower flange to form a clamping cavity used for assembling the clamping mechanism; the clamping mechanism comprises a clamping piece and a pressure-bearing piece which are matched with each other, the pressure-bearing piece is used for installing the ultrahigh-pressure rupture disk, during use, the pressurizing mechanism injects pressure needed by an experiment into the clamping mechanism, the pressure acts on the ultrahigh-pressure rupture disk to verify the magnitude of the rupture pressure of the ultrahigh-pressure rupture disk, and the size of the clamping cavity can be matched with clamping mechanisms of different sizes; therefore, bursting pressure testing of ultrahigh-pressure bursting discs of different sizes can be achieved, the stability of the bursting environment is guaranteed through a heat insulation sleeve and a heater on the clamping mechanism, and then the accuracy of experimental results is improved.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing ultra-high pressure bursting discs, and in particular to a test device for ultra-high pressure bursting discs and a manufacturing method thereof. Background Art

[0002] With the rapid development of petrochemical, nuclear industry and other fields, the application scale of ultra-high pressure vessels is constantly expanding. In order to prevent accidents caused by overpressure in ultra-high pressure vessels, overpressure relief devices came into being. Ultra-high pressure bursting discs are widely used in overpressure relief devices due to their large relief area and excellent sealing performance.

[0003] The bursting pressure of the bursting disc on the overpressure relief device is a key performance indicator, which is related to whether the protection function of the overpressure relief device can be achieved as expected. Therefore, when manufacturing ultra-high pressure bursting discs, a test device that can accurately control and simulate the bursting environment is required for verification. Bursting discs of different sizes need to be adapted to clamping mechanisms of different sizes during testing. However, the structure of the existing test device is too simple and can only use clamping mechanisms of the same size, which results in the same test device only being able to meet the bursting pressure test of bursting discs of corresponding sizes. Therefore, multiple sets of equipment are required to meet the bursting pressure test of bursting discs of various sizes, resulting in high test costs. In addition, when the existing test device is performing a bursting pressure test, the ambient temperature of the bursting disc is very likely to cause temperature loss. When the temperature of the bursting disc is too different from its designed working temperature, it will directly affect the bursting pressure of the bursting disc. This temperature deviation will cause the actual bursting pressure to be different from the bursting pressure at the standard working temperature, thereby causing deviations in the experimental results. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a test device for ultra-high pressure bursting discs and a manufacturing method thereof.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] Disclosed is a test device for ultra-high pressure bursting discs, comprising a boosting mechanism, a clamping mechanism and a test cabinet, wherein a lower flange is mounted on the top of the test cabinet, an upper flange is connected to the upper side of the lower flange by bolts, and a gap is provided between the upper flange and the lower flange to form a clamping cavity for assembling the clamping mechanism; the clamping mechanism comprises a clamping member and a pressure-bearing member that cooperate with each other, the pressure-bearing member comprises a pressure-bearing groove and a pressure input pipe that penetrate each other, the caliber of the input end of the pressure input pipe increases and then decreases, and after penetrating the lower flange, it extends into the test cabinet and is connected to the boosting mechanism, and a locking nut is screwed on a portion located in the test cabinet; one end of the clamping member is fitted with the upper flange, and the other end serves as a clamping end for installing the ultra-high pressure bursting disc, and can be detachably inserted into the pressure-bearing groove, and a blasting hole is opened in the clamping member along the vertical direction.

[0007] Preferably, both the lower flange and the test cabinet have passages for the pressure input pipe to enter the interior of the test cabinet.

[0008] Preferably, the clamping mechanism further comprises a heat-insulating sleeve and an annular heater, the heater is sleeved on the circumference of the clamping member and the pressure-bearing member at the same time, and the heat-insulating sleeve is sleeved on the heater.

[0009] Preferably, the clamping cavity is sealed by a protective cover, the top end of the protective cover is sleeved on the upper flange, the bottom end is sleeved on the lower flange, and the power supply line of the heater passes through the protective cover and extends out of the clamping cavity.

[0010] Preferably, a test hole penetrating the blasting hole is provided on the upper flange. The test hole serves as a temperature measuring port and a discharge port when the blasting experiment is conducted. After the blasting experiment is completed, the test hole serves as an assembly hole for installing a lifting ring, and the lifting ring is screwed to the test hole.

[0011] Preferably, the boosting mechanism includes a manual booster pump, which is connected to a pressure input pipe through a pipeline. The pipeline is provided with a pressure gauge, a three-way valve, a pressure maintaining valve and a pressure sensor in sequence along the input direction, and the idle port of the three-way valve is provided with a pressure relief valve.

[0012] Based on the above-mentioned test device for ultra-high pressure bursting discs, the present invention further discloses a method for manufacturing ultra-high pressure bursting discs, comprising the following steps:

[0013] S1. Welding the manufactured ultra-high pressure bursting disc and the preheated clamping piece into a whole;

[0014] S2. The welded ultra-high pressure bursting disc is slowly cooled in the furnace;

[0015] S3. After the cooled ultra-high pressure bursting disc is cut and polished at the outer edge, it is placed on the pressure-bearing part for pre-arch inspection. Specifically, the pre-arch pressure during the pre-arch inspection is 90% of the bursting pressure. The pre-arch inspection includes whether there are any problems such as pull-off, cracks, and sealing at the welding part of the bursting disc after the pre-arch inspection.

[0016] S4. After the pre-arch inspection is passed, a blasting test is carried out and the test results are analyzed and evaluated.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The experimental device disclosed in the present invention has a simple structure and is easy to use. The size of the clamping cavity can be adapted to clamping mechanisms of different sizes, thereby realizing the bursting pressure test of ultra-high pressure bursting discs of different sizes.

[0019] 2. By adding a heat-insulating sleeve and a heater to the clamping mechanism, on the one hand, the loss of the ambient temperature of the bursting disc can be reduced during the test process; on the other hand, when the ambient temperature of the bursting disc is lost, the lost temperature can be compensated, thereby improving the accuracy of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the arrangement of the present invention;

[0021] Figure 2 It is a schematic diagram of the principle of the boosting mechanism of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the clamping member of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the pressure-bearing member of the present invention;

[0024] Figure 5 It is a cross-sectional view of the protective cover of the present invention.

[0025] Figure identification: 1. Booster mechanism, 11. Manual booster pump, 12. Pressure gauge, 13. Three-way valve, 14. Pressure maintaining valve, 15. Pressure sensor, 16. Pressure relief valve, 2. Clamping mechanism, 21. Clamping part, 211. Blasting hole, 22. Pressure-bearing part, 221. Pressure-bearing groove, 222. Pressure input pipe, 223. Locking nut, 23. Insulation sleeve, 24. Heater, 3. Experimental cabinet, 4. Lower flange, 5. Upper flange, 51. Test hole plate, 6. Ultra-high pressure blasting, 7. Protective cover, 8. Lifting ring. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0027] Example 1

[0028] like Figure 1-4A test device for ultra-high pressure bursting discs shown in the figure comprises a boosting mechanism 1, a clamping mechanism 2 and a test cabinet 3. A lower flange 4 is mounted on the top of the test cabinet 3. An upper flange 5 is connected to the upper part of the lower flange 4 by bolts. A gap is provided between the upper flange 5 and the lower flange 4 to form a clamping cavity for assembling the clamping mechanism 2. The length of the gap can be changed by adjusting the nut on the bolt, thereby achieving the purpose of adjusting the size of the clamping cavity. The two clamping mechanisms 2 of different sizes can be assembled. Specifically, the clamping mechanism 2 comprises a clamping member 21 and a pressure-bearing member 22 which cooperate with each other. The pressure-bearing member 22 comprises a pressure-bearing groove 221 and a pressure input pipe 222 which are interconnected. The caliber of the input end of the pressure input pipe 222 increases and then decreases, and after penetrating the lower flange 4, it extends into the test cabinet 3 and is connected to the boosting mechanism 1. Specifically, the boosting mechanism 1 is a hydraulic booster. The initial increase in the diameter of the input end of the force input tube 222 helps to guide the hydraulic oil to flow in smoothly, and the subsequent reduction is conducive to forming a tighter contact surface, thereby improving the sealing performance of the entire system and preventing hydraulic oil leakage; the pressure input tube 222 is located in the experimental cabinet 3 and is screwed with a locking nut 223. The set locking nut 223 allows the pressure-bearing part 22 to be assembled more securely in the clamping cavity, so that the clamping mechanism 2 can meet the test of higher bursting pressure; one end of the clamping part 21 is fitted with the upper flange 5, and the other end serves as a clamping end for installing the ultra-high pressure bursting disc 6, and can be detachably inserted into the pressure-bearing groove 221. The clamping part 21 is provided with a blasting hole 211 in the vertical direction. During implementation, the booster mechanism 1 injects the pressure required for the experiment into the clamping mechanism 2, and the pressure acts on the ultra-high pressure bursting disc 6 to verify the size of its bursting pressure. In the specific implementation process, different sizes of ultra-high pressure bursting discs 6 correspond to different sizes of clamping parts 21, and different sizes of clamping parts 21 need to correspond to different sizes of pressure-bearing parts 22. Therefore, different sizes of ultra-high pressure bursting discs 6 need to correspond to corresponding clamping mechanisms 2, that is, the size of the clamping mechanism 2 is a variable. In this embodiment, the size of the clamping cavity can be adjusted, so it can adapt to clamping mechanisms 2 of different sizes, and then it can meet the pressure test of clamping parts 21 of different sizes. By replacing different clamping mechanisms 2, the test requirements of clamping parts 21 of different sizes can be met, thereby achieving the purpose of saving testing costs.

[0029] Specifically, both the lower flange 5 and the experimental cabinet 4 have passages for the pressure input pipe 222 to enter the interior of the experimental cabinet 4 .

[0030] As a preferred embodiment of the above embodiment, the clamping mechanism 2 also includes an insulating sleeve 23 and an annular heater 24. The heater 24 is simultaneously sleeved on the circumference of the clamping member 21 and the pressure-bearing member 22, and the insulating sleeve 23 is sleeved on the heater 24. When the ultra-high pressure blasting device 6 is subjected to a bursting pressure test, the insulating sleeve 23 can reduce the loss of the ambient temperature of the ultra-high pressure blasting device 6. When the ambient temperature of the ultra-high pressure blasting device 6 is lost, the heater 24 can compensate for the lost temperature, thereby ensuring the stability of the test environment of the ultra-high pressure blasting device 6, reducing the deviation between the temperature of the test environment of the ultra-high pressure blasting device 6 and its designed working temperature, thereby reducing the impact on the bursting pressure, and making the actual bursting pressure the same as the bursting pressure at the standard working temperature, thereby ensuring the accuracy of the experimental results.

[0031] As a preferred solution of the above embodiment, the clamping cavity is sealed by a protective cover 7, the top end of the protective cover 7 is sleeved on the upper flange 5, the bottom end is sleeved on the lower flange 4, and the power supply line of the heater 24 passes through the protective cover 7 and extends out of the clamping cavity to ensure the operating safety of the test personnel.

[0032] As a preferred solution of the above embodiment, a test hole 51 which penetrates the blasting hole 211 is opened on the upper flange 5. When the blasting experiment is carried out, the test hole 51 serves as a temperature measuring port and a discharge port. When the blasting experiment is completed, the test hole 51 serves as an assembly hole for installing the lifting ring 8, and the lifting ring 8 is screwed to the test hole 51.

[0033] The above-mentioned boosting mechanism 1 includes a manual boosting pump 11, which is connected to a pressure input pipe 22 through a pipeline. A pressure gauge 12, a three-way valve 13, a pressure maintaining valve 14 and a pressure sensor 15 are sequentially arranged along the input direction of the pipeline, and a pressure relief valve 16 is arranged at an idle port of the three-way valve 13.

[0034] Example 2

[0035] A method for manufacturing an ultra-high pressure bursting disc, based on the above-mentioned test device for ultra-high pressure bursting discs, comprises the following steps:

[0036] S1, welding the manufactured ultra-high pressure bursting disc 6 and the preheated clamping member 21 into a whole;

[0037] S2. The welded ultra-high pressure bursting disc 6 is slowly cooled in a furnace to prevent cracks from forming in the ultra-high pressure bursting disc 6;

[0038] S3, the cooled ultra-high pressure bursting disc 6 is cut and polished at the outer edge and then placed on the pressure bearing part 22 for pre-arch inspection. Specifically, the pre-arch pressure during the pre-arch inspection is 90% of the bursting pressure. The pre-arch inspection includes whether there is any pull-off, crack or sealing problem at the welding part of the bursting disc after the pre-arch.

[0039] S4. After the pre-arch inspection is passed, a blasting test is carried out and the test results are analyzed and evaluated.

[0040] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A test device for ultra-high pressure bursting discs, characterized in that: The invention comprises a pressure boosting mechanism (1), a clamping mechanism (2) and a laboratory cabinet (3), wherein the top of the laboratory cabinet (3) is equipped with a lower flange (4), an upper flange (5) is connected to the upper side of the lower flange (4) by bolts, and a gap is provided between the upper flange (5) and the lower flange (4) to form a clamping cavity for assembling the clamping mechanism (2); The clamping mechanism (2) comprises a clamping member (21) and a pressure-bearing member (22) that cooperate with each other. The pressure-bearing member (22) comprises a pressure-bearing groove (221) and a pressure input pipe (222) that are interconnected. The diameter of the input end of the pressure input pipe (222) increases and then decreases. After passing through the lower flange (4), the pressure input pipe extends into the experimental cabinet (3) and is connected to the boosting mechanism (1). A locking nut (223) is screwed on the part located in the experimental cabinet (3). One end of the clamping member (21) is in contact with the upper flange (5), and the other end serves as a clamping end for installing an ultra-high pressure bursting disc (6) and is detachably inserted into the pressure-bearing groove (221). The clamping member (21) is provided with a bursting hole (211) in the vertical direction.

2. The test device for ultra-high pressure bursting disc according to claim 1, characterized in that: The lower flange (5) and the experimental cabinet (4) are both provided with a passage for the pressure input pipe (22) to enter the interior of the experimental cabinet (4).

3. The test device for ultra-high pressure bursting disc according to claim 2, characterized in that: The clamping mechanism (2) further comprises a heat-insulating sleeve (23) and an annular heater (24); the heater (24) is simultaneously sleeved on the circumference of the clamping member (21) and the pressure-bearing member (22); and the heat-insulating sleeve (23) is sleeved on the heater (24).

4. The test device for ultra-high pressure bursting disc according to claim 3, characterized in that: The clamping cavity is sealed by a protective cover (7), the top end of the protective cover (7) is sleeved on the upper flange (5), and the bottom end is sleeved on the lower flange (4), and the power supply line of the heater (24) passes through the protective cover (7) and extends out of the clamping cavity.

5. The test device for ultra-high pressure bursting disc according to claim 4, characterized in that: The upper flange (5) is provided with a test hole (51) which is in communication with the blasting hole (211). When the blasting experiment is carried out, the test hole (51) serves as a temperature measuring port and a discharge port. After the blasting experiment is completed, the test hole (51) serves as an assembly hole for installing a lifting ring (8), and the lifting ring (8) is screwed to the test hole (51).

6. The test device for ultra-high pressure bursting disc according to any one of claims 1 to 5, characterized in that: The boosting mechanism (1) comprises a manual boosting pump (11), the manual boosting pump (11) being connected to the pressure input pipe (22) via a pipeline, the pipeline being provided with a pressure gauge (12), a three-way valve (13), a pressure-maintaining valve (14) and a pressure sensor (15) in sequence along the input direction, and the idle port of the three-way valve (13) being provided with a pressure relief valve (16).

7. A method for manufacturing an ultra-high pressure bursting disc, characterized in that: The test device for ultra-high pressure bursting disc according to any one of claims 1 to 6 comprises the following steps: S1, welding the manufactured ultra-high pressure bursting disc (6) and the preheated clamping member (21) into a whole; S2, the welded ultra-high pressure bursting disc (6) is slowly cooled in a furnace; S3, the cooled ultra-high pressure bursting disc (6) is cut and polished at the outer edge and then placed on the pressure bearing member (22) for pre-arch inspection; S4. After the pre-arch inspection is passed, a blasting test is carried out and the test results are analyzed and evaluated.

8. The method for manufacturing an ultra-high pressure bursting disc according to claim 7, characterized in that: In S3, the pre-arch pressure during the pre-arch inspection is 90% of the bursting pressure. The pre-arch inspection includes whether there are any problems such as pull-off, cracks, or sealing at the welding position of the bursting disc after the pre-arch.

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