A graphite bursting disc safety device

Abstract

The present invention relates to a graphite bursting disc safety device, comprising an upper holder (1), a lower holder (2), and a graphite bursting disc (3) arranged between the upper holder (1) and the lower holder (2); the graphite bursting disc (3) comprises graphite paper (31), a sealing film (32), and a strength film (33); the sealing film (32) is arranged on both sides of the strength film (33) and between the graphite paper (31); the lower holder (2) is provided with a vent hole (22); the strength film (33) is provided with an annular slit (331). Compared with the prior art, the present invention has the advantages of simple processing, high bursting pressure stability, high back pressure resistance, good sealing performance, and not easy to be damaged during transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of safety accessories, and in particular to a graphite bursting disc safety device. Background Art

[0002] A graphite bursting disc safety device is based on graphite. Grooves can be machined into one or both sides of the graphite to control the bursting pressure. When compressed, the disc ruptures by bending or shearing. Existing graphite bursting disc safety devices are primarily made of graphite plates. This material, however, is limited by its inherent sealing properties; processing is difficult; the processing generates significant pollution, impacting the health of production personnel; and the entire disc must be replaced after rupture, resulting in high costs. Therefore, there is a need to develop a more environmentally friendly, low-cost, easy-to-process, and replaceable graphite bursting disc safety device with improved sealing properties to meet market demand.

[0003] Utility model patent CN209325122U discloses a graphite bursting disc device, which includes a metal pressure ring and a horizontal graphite plate positioned at the center of the metal pressure ring. A vent channel is located in the middle of the metal pressure ring, and the horizontal graphite plate covers the entire vent channel. The pressure-sensitive element in this utility model is a graphite plate, which is independent of the metal pressure ring. If the pressure-sensitive element fails, simply replace the graphite plate. The bursting pressure can be adjusted by adjusting the thickness of the graphite plate and the inner diameter of the metal pressure ring. However, this device suffers from low bursting pressure stability, backpressure resistance, and sealing performance. Summary of the Invention

[0004] The purpose of the present invention is to provide a graphite bursting disc safety device to improve the stability of the bursting pressure.

[0005] The object of the present invention can be achieved by the following technical solutions: A graphite bursting disc safety device comprises an upper holder, a lower holder and a graphite bursting disc disposed between the upper holder and the lower holder;

[0006] The graphite bursting disc comprises graphite paper, a sealing film and a strength film, wherein the sealing film is arranged on both sides of the strength film and between two layers of graphite paper;

[0007] The lower holder is provided with a vent hole;

[0008] The strength membrane is provided with an annular slit.

[0009] Specifically, the graphite rupture disc comprises graphite paper, a sealing film, a strength film, a sealing film, and finally, graphite paper, arranged from top to bottom. The medium acts on the graphite rupture disc through the vents. When the applied force reaches the rupture pressure of the graphite rupture disc, the circumferential slits in the strength film corresponding to the vents are stretched and broken, releasing pressure.

[0010] Preferably, the upper clamp is an annular structure, and forms a circular pressure relief area after being assembled with the lower clamp, and the vent hole is provided in the circular pressure relief area.

[0011] Preferably, the lower clamp is provided with a positioning groove, and the upper clamp is provided with a positioning flange matching the positioning groove, and the positioning flange can be embedded in the positioning groove to achieve horizontal limitation of the upper clamp.

[0012] Further preferably, the diameter of the positioning groove matches the outer diameter of the graphite paper.

[0013] Preferably, the vent holes are arranged in a circular array to achieve back pressure support for the graphite bursting disc.

[0014] Preferably, the total area of the vent holes is not less than 70% of the minimum discharge area of the bursting disc.

[0015] Preferably, the diameter of the annular slit is smaller than the inner diameter of the upper holder. The size of the annular slit controls the bursting pressure of the graphite bursting disc.

[0016] Preferably, the inner diameter area of the upper holder is larger than the minimum discharge area of the bursting disc.

[0017] Preferably, the sealing film material is fluoroplastic.

[0018] Preferably, the outer diameter of the strength membrane is consistent with the outer diameter of the sealing membrane.

[0019] Preferably, the outer diameter of the strength film and the outer diameter of the sealing film are smaller than the outer diameter of the graphite paper.

[0020] Preferably, the central angle of the long circumferential slit connecting section of the strength membrane is between 20° and 40°.

[0021] Preferably, the strength film, the sealing film and the graphite paper are assembled by gluing. The strength film and the sealing film are completely wrapped by the upper and lower layers of graphite paper to prevent them from being corroded by the medium.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention uses graphite paper instead of the graphite plate in the prior art. The bursting pressure is controlled by the circumferential slits provided on the strength membrane, and the sealing is ensured by the sealing membrane. Therefore, compared with the prior art, the present invention has the advantages of simple processing, high bursting pressure stability, high back pressure resistance, good sealing performance, and is not easily damaged during transportation.

[0024] 2. The present invention controls the bursting pressure by means of the annular slits provided on the strength membrane. Compared with the prior art which controls the bursting pressure by means of the thickness of the graphite plate itself, the present invention has better stability.

[0025] 3. The present invention achieves a sealing effect by installing a sealing film, which has better sealing performance than the existing technology that relies on the graphite plate itself for sealing;

[0026] 4. The lower holder of the present invention is provided with a vent structure, which makes the graphite bursting disc have a strong ability to resist back pressure, and expands the application range of the bursting disc safety device;

[0027] 5. The present invention uses graphite paper to replace the graphite plate in the prior art, which is lower in cost and easier to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the cross-sectional structure of the graphite bursting disc safety device of the present invention;

[0029] Figure 2 This is a schematic top view of the graphite bursting disc safety device of the present invention;

[0030] Figure 3 Schematic diagram of the cross-sectional structure of the upper clamp of the present invention;

[0031] Figure 4 Schematic diagram of the cross-sectional structure of the lower clamper of the present invention;

[0032] Figure 5 This is a schematic diagram of the top view of the lower clamp of the present invention;

[0033] Figure 6 Schematic diagram of the cross-sectional structure of the bursting disc of the present invention;

[0034] Figure 7 This is a schematic diagram of the top view of the strength membrane of the present invention;

[0035] In the figure: 1-upper holder, 11-positioning flange, 2-lower holder, 21-positioning groove, 22-vent, 3-graphite bursting disc, 31-graphite paper, 32-sealing membrane, 33-strength membrane, 331-circumferential slit. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operating processes, but the protection scope of the present invention is not limited to the following embodiments.

[0037] Example 1

[0038] A graphite bursting disc safety device, comprising an upper holder 1, a lower holder 2, and a graphite bursting disc 3, see Figure 1 .

[0039] The graphite bursting disc 3 comprises a graphite paper 31, a sealing film 32 and a strength film 33. The sealing film 32 is arranged on both sides of the strength film 33 and between the two layers of graphite paper 31. Figure 6 , the strength membrane 33 is provided with an annular slit 331, the size of the annular slit 331 is smaller than the inner diameter of the upper holder 1, see Figure 7 .

[0040] From an overall analysis, in this embodiment, the upper holder 1 has an annular structure and forms a circular pressure relief area when assembled with the lower holder 2. The lower holder 2 is provided with a vent 22 at a position corresponding to the circular pressure relief area. The graphite bursting disc 3 is clamped between the upper holder 1 and the lower holder 2. When the applied force reaches the bursting pressure of the graphite bursting disc 3, the annular slit 331 of the strength membrane at the position corresponding to the vent 22 is stretched and damaged, releasing the pressure.

[0041] In specific implementation, the vent holes 22 are arranged in a circular array. Figure 2 and Figure 5 , realizing the back pressure support of the graphite bursting disc 3, which can withstand back pressure up to 0.5MPa.

[0042] In specific implementation, the lower clamp 2 is provided with a positioning groove 21, and the upper clamp 1 is provided with a positioning flange 11 matching the positioning groove 21. The positioning flange 11 can be embedded in the positioning groove 21 to achieve horizontal limitation of the upper clamp 1. Figure 3 and Figure 4 .

[0043] During specific implementation, the diameter of the positioning groove 21 matches the outer diameter of the graphite paper 31, the outer diameter of the strength membrane 33 is consistent with the outer diameter of the sealing membrane 32, the outer diameter of the strength membrane 33 and the outer diameter of the sealing membrane 32 are smaller than the outer diameter of the graphite paper 31, the strength membrane 33, the sealing membrane 32 and the graphite paper 31 are assembled by gluing, and the strength membrane 33 and the sealing membrane 32 are completely wrapped by the upper and lower layers of graphite paper 31 to prevent them from being corroded by the medium.

[0044] In specific implementation, the sealing film 32 is made of fluoroplastics, which plays a sealing role. The entire device is tested for airtightness. The test pressure is 85% of the burst pressure and the pressure is maintained for 5 minutes. The sealing performance is good.

[0045] During specific implementation, the graphite bursting disc 3 is disposed between the upper holder 1 and the lower holder 3 and fixed by the equipment flange.

[0046] The above description of the embodiments is intended to facilitate understanding and use of the present invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A graphite bursting disc safety device, characterized in that: It comprises an upper clamp (1), a lower clamp (2), and a graphite bursting disc (3) arranged between the upper clamp (1) and the lower clamp (2); The graphite bursting disc (3) comprises graphite paper (31), a sealing film (32) and a strength film (33), wherein the sealing film (32) is arranged on both sides of the strength film (33) and between the graphite paper (31); The lower holder (2) is provided with a vent hole (22); The strength membrane (33) is provided with a circumferential slit (331); The outer diameter of the strength membrane (33) is consistent with the outer diameter of the sealing membrane (32); The outer diameters of the strength film (33) and the sealing film (32) are smaller than the outer diameter of the graphite paper (31).

2. The graphite bursting disc safety device according to claim 1, characterized in that: The upper clamp (1) is an annular structure, and forms a circular pressure relief area after being assembled with the lower clamp (2), and the vent hole (22) is arranged in the circular pressure relief area.

3. The graphite bursting disc safety device according to claim 1, characterized in that: The lower clamp (2) is provided with a positioning groove (21), and the upper clamp (1) is provided with a positioning flange (11) matching the positioning groove (21). The positioning flange (11) can be embedded in the positioning groove (21) to achieve horizontal limitation of the upper clamp (1).

4. The graphite bursting disc safety device according to claim 3, characterized in that: The diameter of the positioning groove (21) matches the outer diameter of the graphite paper (31).

5. The graphite bursting disc safety device according to claim 1, characterized in that: The vent holes (22) are arranged in a circular array.

6. The graphite bursting disc safety device according to claim 1, characterized in that: The diameter of the annular slit (331) is smaller than the inner diameter of the upper clamp (1).

7. The graphite bursting disc safety device according to claim 1, characterized in that: The sealing film (32) is made of fluoroplastic.

8. The graphite bursting disc safety device according to any one of claims 1 to 7, characterized in that: The strength film (33), the sealing film (32) and the graphite paper (31) are assembled by gluing.

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