A high-pressure bursting disc clamping device and a sealing detection method thereof

Abstract

The present invention discloses a high-pressure bursting disc clamping device and a sealing detection method thereof, wherein the lower end face of the upper valve body is provided with an accommodating cavity, the upper end face of the upper valve body is provided with a first air passage connected with the accommodating cavity; the upper end face of the lower valve body is provided with a second air passage penetrating the lower end face thereof, the upper end face of the lower valve body extends into the accommodating cavity, and the outer wall of the lower valve body is threadedly connected with the inner side wall of the accommodating cavity; the upper end face and the lower end face of the upper clamp are penetrating, the upper end face and the lower end face of the lower clamp are penetrating, the lower end face of the lower clamp is arranged on the upper end face of the lower valve body, the lower end face of the upper clamp is arranged on the upper end face of the lower clamp, the upper end face of the upper clamp abuts against the upper wall of the accommodating cavity, and the lower end face of the upper clamp and the upper end face of the lower clamp are used to clamp the bursting disc; the inner side wall of the accommodating cavity is provided with a detection air passage penetrating the outer wall thereof. The present invention can perform an overall and precise sealing detection on the high-pressure bursting disc clamping device without affecting the performance of the bursting disc.

Description

Technical Field

[0001] The invention belongs to the field of bursting disc installation detection, and in particular relates to a high-pressure bursting disc clamping device and a sealing detection method thereof. Background Art

[0002] Sealing test is an important test index for closed systems or devices before use. During the manufacturing process, connection problems such as flanges and threads or welding problems such as incomplete welding, pores, and cracks often lead to leakage in pressure vessels. For devices with extremely or highly toxic working fluids or devices that are not designed to allow trace leakage, the pressure used for sealing test must be higher than the working pressure of the device. For bursting disc clamping devices, their working pressure is generally much higher than the bursting pressure of the bursting disc. The reason is that after the bursting disc explodes due to the increase in pressure, the sealing of the device must still be ensured during the process of continued pressure increase. If the traditional hydraulic test or air tightness test method is used for sealing test under the working pressure of the bursting disc clamping device, it will affect or destroy the structure of the bursting disc, reduce the performance of the bursting disc, and even cause the bursting disc to explode, resulting in the bursting disc and the clamping device being unusable. It is a common method to perform pressure test on the clamping device without the bursting disc installed; after the pressure test is completed, the bursting disc is reinstalled and used. This method can test the pressure bearing capacity of the clamping device, but cannot test the sealing of the complete clamping device after the bursting disc is installed.

[0003] The existing bursting disc clamping device uses lateral connecting pieces and connecting screws to position the upper clamp and the lower clamp, which will result in insufficient clamping force between the upper clamp, the bursting disc and the lower clamp, resulting in poor sealing effect. For the sealing test, the existing bursting disc clamping device cannot be pressure tested by synchronous pressurization at both ends; if single-side pressure is used for air tightness testing, the applied pressure cannot be higher than the bursting pressure of the bursting disc, and the test effect cannot strictly meet the requirements; if the clamping device without the bursting disc is pressure tested first, and the bursting disc is reinstalled after the pressure test is completed, the complete clamping device after the bursting disc is installed cannot be tested for sealing. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a high-pressure bursting disc clamping device and a sealing detection method thereof, which has good sealing effect and can perform an overall and precise sealing detection on the high-pressure bursting disc clamping device without affecting the performance of the bursting disc.

[0005] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0006] The cam is an airtight container, the upper and lower ends of which are connected to the valve body, and the cam is connected to the valve body by a threaded connection.

[0007] Furthermore, the upper clamp and the lower clamp are annular structures, and the axes of the first air duct, the upper clamp, the lower clamp and the second air duct are on the same straight line.

[0008] Furthermore, the upper clamper and the upper valve body are coaxially positioned via a positioning pin.

[0009] Furthermore, the detection air channel is opened near the contact position between the lower end surface of the upper clamp and the upper end surface of the lower clamp.

[0010] Furthermore, a sealing plug is provided between the outer wall of the lower valve body and the inner wall of the accommodating cavity.

[0011] Furthermore, the upper clamp is made of copper material.

[0012] Furthermore, the lower clamp is made of copper material.

[0013] A method for detecting the sealing performance of a high-pressure bursting disc clamping device, wherein the bursting disc is clamped between the lower end surface of the upper clamp and the upper end surface of the lower clamp;

[0014] Applying bubble liquid at the outlet of the detection airway;

[0015] Apply the same pressure to the first air channel and the second air channel at the same time. If the bubble liquid at the outlet of the detection air channel bulges, it is determined that the sealing of the high-pressure bursting disc clamping device is not good, and the bursting disc needs to be re-clamped. Until the bubble liquid at the outlet of the detection air channel does not bulge, it is determined that the sealing of the high-pressure bursting disc clamping device is good.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: the high-pressure bursting disc clamping device provided by the present invention, when in use, clamps the bursting disc between the lower end face of the upper clamp and the upper end face of the lower clamp, and during the threaded fastening process between the upper valve body and the lower valve body, the upper valve body and the upper clamp, the upper clamp and the bursting disc, the bursting disc and the lower clamp, and the lower clamp and the lower valve body gradually contact, and generate a pressing force on each contact surface. During the process of gradually increasing the pressing force, the upper clamp and the lower clamp generate a slight deformation, which can better form a sealing effect.

[0017] A method for detecting the sealing performance of a high-pressure bursting disc clamping device. When performing the sealing performance detection of the high-pressure bursting disc clamping device, the same pressure is applied to the first airway and the second airway at the same time. If the bubble liquid at the outlet of the test airway bulges, it is determined that the sealing performance of the high-pressure bursting disc clamping device is not good, and the bursting disc needs to be re-clamped until the bubble liquid at the outlet of the test airway does not bulge, then it is determined that the sealing performance of the high-pressure bursting disc clamping device is good. The present invention can perform an overall and precise sealing performance detection on the high-pressure bursting disc clamping device without affecting the performance of the bursting disc. Specifically, firstly, the sealing performance detection of the complete clamping device after the bursting disc is installed can effectively test whether the pressure bearing capacity and sealing performance of the clamping device meet the requirements at the same time, avoiding the situation where the sealing performance cannot be detected after the bursting disc is installed after the traditional pressure test. Secondly, the first airway and the second airway of the clamping device are connected to the same pressure source at the same time, ensuring that the pressure on both sides of the bursting disc is consistent at any time during the boosting process, that is, the pressure difference on both sides is zero, ensuring that the structure and performance of the bursting disc are not affected during the boosting process. Secondly, the sealing test is based on detecting whether the bubble liquid at the airway outlet is bulging. If any of the contact surfaces between the upper valve body and the upper clamp, the upper clamp and the bursting disc, the bursting disc and the lower clamp, and the lower clamp and the lower valve body leaks, the bubble liquid film can be observed to bulge and leakage can be determined. This method can detect tiny leaks.

[0018] Furthermore, the upper clamp and the upper valve body are coaxially positioned by means of positioning pins, making installation more convenient and quick.

[0019] Furthermore, the detection air passage is opened near the contact position between the lower end surface of the upper holder and the upper end surface of the lower holder, which can better detect whether leakage occurs at the bursting disc.

[0020] Furthermore, a sealing plug is provided between the outer wall of the lower valve body and the inner wall of the accommodating cavity to ensure good air tightness between the upper and lower valve bodies.

[0021] Furthermore, the upper clamp and the lower clamp are made of copper material. Copper is relatively soft and has good thermal expansion performance under high temperature conditions, which can better form a sealing effect.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The present invention is a schematic structural diagram of a high-pressure bursting disc clamping device.

[0025] In the figure: 1-upper valve body; 2-positioning pin; 3-upper clamp; 4-bursting disc; 5-lower clamp; 6-lower valve body; 7-second air channel; 8-detection air channel; 9-first air channel; 10-accommodating chamber. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] As a specific embodiment of the present invention, Figure 1 As shown, a high-pressure bursting disc clamping device comprises an upper valve body 1, a positioning pin 2, an upper clamp 3, a lower clamp 5 and a lower valve body 6. An accommodating cavity 10 is provided on the lower end surface of the upper valve body 1, and a first air passage 9 communicating with the accommodating cavity 10 is also provided on the upper end surface of the upper valve body 1. A second air passage 7 penetrating the lower end surface of the lower valve body 6 is provided on the upper end surface.

[0028] like Figure 1 As shown, the upper end face of the lower valve body 6 extends into the accommodating chamber 10, and the outer wall of the lower valve body 6 is threadedly connected to the inner wall of the accommodating chamber 10. Preferably, a sealing plug is provided between the outer wall of the lower valve body 6 and the inner wall of the accommodating chamber 10. The upper end face and the lower end face of the upper clamp 3 are connected, and the upper end face and the lower end face of the lower clamp 5 are connected. Preferably, the upper clamp 3 and the lower clamp 5 are annular structures.

[0029] like Figure 1As shown, the lower end face of the lower clamp 5 is arranged on the upper end face of the lower valve body 6, the lower end face of the upper clamp 3 is arranged on the upper end face of the lower clamp 5, the upper end face of the upper clamp 3 is against the upper wall of the accommodating cavity 10, the lower end face of the upper clamp 3 and the upper end face of the lower clamp 5 are used to clamp the bursting disc 4, and the upper clamp 3 and the bursting disc 4 are coaxially positioned by the positive arch convex structure of the bursting disc itself.

[0030] As a preferred embodiment, the upper clamper 3 and the upper valve body 1 are coaxially positioned by the positioning pin 2, and the axes of the first air passage 9, the upper clamper 3, the lower clamper 5 and the second air passage 7 are on the same straight line.

[0031] like Figure 1 As shown, a detection air channel 8 is opened on the inner wall of the accommodating cavity 10 and passes through the outer wall thereof. Preferably, the detection air channel 8 is opened near the contact position between the lower end surface of the upper clamp 3 and the upper end surface of the lower clamp 5, so as to better detect leakage problems at the bursting disc 4.

[0032] Since copper is relatively soft and has good thermal expansion performance under high temperature conditions, in this embodiment, the upper clamp 3 and the lower clamp 5 are both made of copper material.

[0033] During the thread tightening process, the upper valve body 1 and the upper clamp 3, the upper clamp 3 and the bursting disc 4, the bursting disc 4 and the lower clamp 5, and the lower clamp 5 and the lower valve body 6 gradually contact each other and generate a pressing force on each contact surface. As the pressing force gradually increases, the upper clamp 3 and the lower clamp 5 are slightly deformed, which can better form a sealing effect. When the thread pressing force between the upper valve body 1 and the lower valve body 6 reaches the set value, it can be considered that the bursting disc 4 clamping device is assembled, and the overall sealing test operation of the bursting disc clamping device can be carried out.

[0034] A method for detecting the sealing performance of a high-pressure bursting disc clamping device of the present invention is as follows:

[0035] The bursting disc 4 is clamped between the lower end surface of the upper holder 3 and the upper end surface of the lower holder 5;

[0036] The first air channel 9 and the second air channel 7 are connected to the same pressure source, and the same pressure is applied to the first air channel 9 and the second air channel 7 at the same time, so that the pressure on both sides of the bursting disc 4 is consistent, that is, the pressure difference on both sides of the bursting disc 4 is zero, ensuring that the structure and performance of the bursting disc 4 are not affected;

[0037] Before the pressure is increased, smear the bubble liquid (such as soapy water) to the outlet of the detection airway 8 to form a soapy water film; after the pressure is increased, observe the soapy water film, and use whether the soapy water film bulges as a basis for sealing inspection;

[0038] During the pressure increase process, if the soapy water film at the outlet of the detection airway 8 is observed to bulge, it can be judged that the clamping device is leaking, and at least one of the contact surfaces between the upper valve body 1 and the upper clamp 3, the upper clamp 3 and the bursting disc 4, the bursting disc 4 and the lower clamp 5, and the lower clamp 5 and the lower valve body 6 is leaking. At this time, the pressure increase is stopped, and the clamping device is reinstalled and tightened after the pressure is released. After the installation is completed, the sealing test is performed again;

[0039] During the process of increasing the pressure to the set pressure, if the soapy water film does not bulge, let the clamping device stand for 30 minutes and continue to observe the condition of the soapy water film; if the soapy water film at the outlet of the detection airway 8 is observed to bulge, it can be determined that the clamping device is leaking, and at least one of the contact surfaces between the upper valve body 1 and the upper clamp 3, the upper clamp 3 and the bursting disc 4, the bursting disc 4 and the lower clamp 5, and the lower clamp 5 and the lower valve body 6 is leaking, then stop increasing the pressure, reinstall and tighten after the pressure is released, and perform the sealing test again after completion; if the soapy water film at the outlet of the detection airway 8 is not observed to bulge, it can be determined that the bursting disc clamping device has good sealing and can be used for subsequent normal use.

[0040] It can be seen that the present invention can perform an overall and detailed sealing test on the high-pressure bursting disc clamping device without affecting the performance of the bursting disc. The sealing test of the complete clamping device after the bursting disc is installed can effectively test whether the pressure bearing capacity and sealing of the clamping device meet the requirements at the same time, avoiding the situation where the sealing cannot be tested after the bursting disc is installed after the traditional pressure test, and at the same time, it can also ensure that the structure and performance of the bursting disc are not affected during the pressure increase process. The sealing test is based on whether the soapy water film at the airway outlet is bulging, and small leaks can be detected.

[0041] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for detecting the sealing performance of a high-pressure bursting disc clamping device, characterized in that: The high-pressure bursting disc clamping device comprises an upper valve body (1), a lower valve body (6), an upper clamp (3) and a lower clamp (5); the lower end surface of the upper valve body (1) is provided with a receiving cavity (10); the upper end surface of the upper valve body (1) is provided with a first air passage (9) communicating with the receiving cavity (10); the upper end surface of the lower valve body (6) is provided with a second air passage (7) penetrating the lower end surface thereof; the upper end surface of the lower valve body (6) extends into the receiving cavity (10); the outer wall of the lower valve body (6) is threadedly connected to the inner wall of the receiving cavity (10); the upper clamp (3 ... is provided with a second air passage (7) penetrating the lower end surface thereof; the upper end surface of the lower valve body (6) is provided with a second air passage (7) penetrating the upper end surface of the lower valve body (6); The upper end face and the lower end face of the lower clamp (5) are connected, the upper end face and the lower end face of the lower clamp (5) are connected, the lower end face of the lower clamp (5) is arranged on the upper end face of the lower valve body (6), the lower end face of the upper clamp (3) is arranged on the upper end face of the lower clamp (5), the upper end face of the upper clamp (3) is against the upper wall of the accommodating cavity (10), and the lower end face of the upper clamp (3) and the upper end face of the lower clamp (5) are used to clamp the bursting disc (4); the inner side wall of the accommodating cavity (10) is provided with a detection airway (8) which passes through the outer wall thereof; The bursting disc (4) is clamped between the lower end surface of the upper holder (3) and the upper end surface of the lower holder (5); Applying bubble liquid at the outlet of the detection airway (8); The same pressure is applied to the first air passage (9) and the second air passage (7) at the same time. If the bubble liquid at the outlet of the detection air passage (8) swells, it is determined that the sealing performance of the high-pressure bursting disc clamping device is poor and the bursting disc (4) needs to be re-clamped until the bubble liquid at the outlet of the detection air passage (8) does not swell. In this case, it is determined that the sealing performance of the high-pressure bursting disc clamping device is good.

2. A method for detecting the sealing performance of a high-pressure bursting disc clamping device according to claim 1, characterized in that: The upper clamp (3) and the lower clamp (5) are annular structures, and the axes of the first air channel (9), the upper clamp (3), the lower clamp (5) and the second air channel (7) are on the same straight line.

3. A method for detecting the sealing performance of a high-pressure bursting disc clamping device according to claim 1, characterized in that: The upper clamp (3) and the upper valve body (1) are coaxially positioned via a positioning pin (2).

4. A method for detecting the sealing performance of a high-pressure bursting disc clamping device according to claim 1, characterized in that: The detection air channel (8) is opened near the contact position between the lower end surface of the upper clamp (3) and the upper end surface of the lower clamp (5).

5. A method for detecting the sealing performance of a high-pressure bursting disc clamping device according to claim 1, characterized in that: A sealing plug is provided between the outer wall of the lower valve body (6) and the inner wall of the accommodating cavity (10).

6. A method for detecting the sealing performance of a high-pressure bursting disc clamping device according to claim 1, characterized in that: The upper clamp (3) is made of copper material.

7. A method for detecting the sealing performance of a high-pressure bursting disc clamping device according to claim 1, characterized in that: The lower clamp (5) is made of copper material.

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