Flat plate slotted rupture disk device resistant to high back pressure and capable of relieving pressure in full channel

Abstract

The invention discloses a flat plate slotted rupture disk device resistant to high back pressure and full-channel pressure relief, which relates to the technical field of safe overpressure relief and comprises a flat plate slotted rupture disk assembly, an upper clamp and a lower clamp. The flat plate slotted rupture disk assembly comprises a flat plate slotted rupture disk and a plane supporting plate which are respectively provided with a C-shaped weakening groove and a C-shaped circular seam; according to the flat plate slotted rupture disk, the C-shaped weakening groove for controlling the rupture pressure can crack along the annular groove to form a full-channel relief opening during rupture, and the pressure relief efficiency is guaranteed; the diameter of the C-shaped circular seam is 2-4mm smaller than that of the C-shaped weakening groove, so that the supporting plate is ensured to be opened along the seam and penetrate through the upper-layer C-shaped groove rupture disk, and a discharge channel is ensured to be completely opened; dense spot welding is carried out between the flat slotted rupture disk and the planar supporting plate, so that no fragment of the rupture disk during blasting is ensured; the matching relation of the inner diameters of the upper and lower clamping devices and the diameters of the C-shaped groove in the rupture disk and the C-shaped circular seam in the plane supporting plate can ensure that the product is resistant to high back pressure, and the whole flow channel is opened.

Description

Technical Field

[0001] The invention relates to the technical field of safe overpressure relief, and in particular to a flat plate grooved bursting disc device capable of resisting high back pressure and full-channel pressure relief. Background Art

[0002] Traditional flat-plate slotted bursting discs are mostly single-layer cross-slot structures. Patent number CN202123349051.X is a bursting disc, explosion suppressor and explosion suppressor assembly. The main bursting disc is a cross-slot structure. During overpressure blasting, it will break into four petals along the cross slot to ensure that there is no fragmentation during the blasting. However, there are the following problems: 1. Single-layer bursting discs cannot withstand high back pressure. If a back-pressure-resistant structure is adopted, the discharge diameter will be greatly reduced, and the discharge port may not be fully opened, resulting in insufficient discharge volume; 2. For cross-slot bursting discs, under liquid phase conditions, the product is overpressure exploded, and the four petals often cannot be opened at the same time, resulting in excessive flow resistance; Therefore, traditional cross-slot flat-plate bursting discs cannot meet the requirements of high back pressure and full-channel overpressure discharge. Summary of the invention

[0003] The object of the present invention is to provide a flat plate with grooved bursting disc device capable of resisting high back pressure and full-channel pressure relief, so as to solve the problem that the traditional cross-groove flat plate bursting disc mentioned in the above background technology cannot meet the requirements of high back pressure and full-channel overpressure relief.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flat plate grooved bursting disc device resistant to high back pressure and full-channel pressure relief, comprising a flat plate grooved bursting disc assembly, and an upper clamp arranged on the upper side and a lower clamp arranged on the lower side thereof; the flat plate grooved bursting disc assembly comprises an upper flat plate grooved bursting disc and a lower flat support plate, the flat plate grooved bursting disc is provided with a C-shaped weakening groove, and the flat support plate is provided with a C-shaped annular seam and an anti-fragmentation connection structure.

[0005] Furthermore, the flat-plate grooved bursting piece is tightly spot-welded into one body between the inner part of the C-shaped weakening groove and the flat support plate using a resistance spot welding machine, and the number of welds is determined according to the bursting pressure and the strength of the welds. The greater the bursting pressure, the more welds are required, and the greater the strength of the welds, the fewer welds are required.

[0006] Furthermore, the planar support plate is provided with a plurality of flow holes, and the diameter and number of the flow holes are proportional to the discharge area, medium pressure increase rate and bursting pressure of the flat plate grooved bursting disc.

[0007] Preferably, the number of the flow holes is 4-6, and the diameter is 4-6 mm.

[0008] Preferably, the diameter of the C-shaped weakening groove is 2-4 mm larger than the diameter of the C-shaped annular gap.

[0009] Preferably, the upper clamp is arranged in a circular ring shape, and its inner diameter is 3-5 mm larger than the diameter of the C-shaped weakening groove, and the lower clamp is arranged in a circular ring shape, and its inner diameter is 3-5 mm smaller than the diameter of the C-shaped annular gap.

[0010] Preferably, the C-shaped weakening groove is formed by pressing with an annular groove pressing mold or other precision machine tool processing; the remaining depth of the C-shaped weakening groove is proportional to the bursting pressure.

[0011] Preferably, the C-shaped annular seam, the anti-fragmentation connection structure and the flow holes on the planar support plate are all formed by laser cutting.

[0012] Preferably, the back pressure resistance of the planar support plate is proportional to the plate thickness.

[0013] Preferably, the pressure relief capacity of the flat-plate grooved bursting disc assembly is proportional to the caliber of the lower holder.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The bursting disc of the present invention is suitable for overpressure relief of gas and liquid media, and can achieve full flow channel opening without fragments;

[0016] 2. The C-shaped weakening groove of the flat grooved bursting disc to control the bursting pressure can crack along the annular groove to form a full-channel discharge port during blasting, ensuring the pressure relief efficiency;

[0017] 3. The C-shaped annular seam is set on the back pressure-resistant flat support plate. The diameter of the C-shaped annular seam is 2-4mm smaller than the diameter of the C-shaped weakening groove, so as to ensure that the support plate opens along the seam and passes through the upper C-shaped groove bursting disc to ensure that the discharge channel is fully opened;

[0018] 4. The flat grooved rupture disc and the flat support plate are densely spot welded to ensure that there are no fragments of the rupture disc during blasting;

[0019] 5. The matching relationship in diameter between the inner diameter of the upper and lower clamps and the C-shaped groove on the bursting disc and the C-shaped annular seam on the flat support plate can ensure that the product can withstand high back pressure and the full flow channel is open. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view;

[0021] Figure 2 This is a bottom view;

[0022] Figure 3 for Figure 1 Sectional view of AA in the middle;

[0023] Figure 4 It is a cross-sectional view of a flat-plate rupture disc with grooves and a flat support plate;

[0024] In the figure: flat plate with groove bursting disc assembly-1, flat plate with groove bursting disc-11, flat support plate-12, C-shaped weakening groove-13, C-shaped annular seam-14, anti-fragment connection structure-15, welding point-16, flow hole-17, upper clamp-2, lower clamp-3. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Please refer to Figure 1-4 , Figure 1 It is a top view; Figure 2 This is a bottom view; Figure 3 for Figure 1 Sectional view of AA in the middle; Figure 4 It is a cross-sectional view of a flat grooved bursting disc and a flat support plate.

[0027] The present invention provides a flat plate grooved bursting disc device with high back pressure resistance and full-channel pressure relief, and is particularly related to the special requirements of bursting discs used in gas, liquid phase and explosion occasions, such as full-channel opening, fragment-free pressure relief and high-speed responsiveness to rapid pressure increase. The device comprises a flat plate grooved bursting disc assembly 1, and an upper clamp 2 arranged on the upper side of the flat plate grooved bursting disc assembly 1 and a lower clamp 3 arranged on the lower side. The upper clamp 2 and the lower clamp 3 support and fix the flat plate grooved bursting disc assembly 1.

[0028] The flat plate with groove bursting disc assembly 1 comprises a flat plate with groove bursting disc 11 arranged on the upper layer for controlling the release pressure and a flat support plate 12 arranged on the lower layer for bearing the back pressure. The flat plate with groove bursting disc 11 is provided with a C-shaped weakening groove 13. The bursting pressure of the flat plate with groove bursting disc 11 can be accurately controlled by precisely controlling the remaining depth of the C-shaped weakening groove 13. The greater the remaining depth, the greater the bursting pressure, and the smaller the remaining depth, the smaller the bursting pressure; the flat support plate 12 is provided with a C-shaped annular seam 14 and an anti-fragmentation connection structure 15. The C-shaped annular seam 14 is a specially designed annular seam structure to ensure that the structure has no fragments under rapid pressure increase, and can be realized in gas, The discharge port can be fully opened under liquid working conditions, and the back pressure resistance of the flat support plate 12 is proportional to the plate thickness. The thicker the thickness, the stronger the back pressure resistance; and the flat plate with groove bursting piece 11 is tightly spot-welded into one between the inner part of the C-shaped weakening groove 13 and the flat support plate 12 by using a resistance spot welding machine in a multi-point spot welding manner to prevent the bursting piece from exploding into fragments. The number of welds 16 is determined according to the bursting pressure and the strength of the welds. The greater the bursting pressure, the more welds 16 are required, and the greater the strength of the welds, the fewer the number of welds 16 are required. Conversely, the smaller the bursting pressure, the fewer the number of welds 16 are required, and the smaller the strength of the welds, the more welds 16 are required.

[0029] The C-shaped weakening groove 13 can be formed by pressing with an annular groove pressing die or other precision machine tool processing. The diameter of the C-shaped weakening groove 13 is 2-4 mm larger than the diameter of the C-shaped annular gap 14.

[0030] The flat support plate 12 is penetrated by a plurality of flow holes 17 with a diameter of 4-6 mm. When the pressure increases rapidly, the pressure can act quickly on the upper flat plate with groove bursting disc 11 through the plurality of flow holes 17. The flat plate with groove bursting disc 11 opens rapidly along the C-shaped weakening groove 13, thereby completing the pressure relief operation and driving the flat support plate 12 to open along the C-shaped annular seam 14, so as to improve the high responsiveness of the opening of the flat support plate 12 to the rapid pressure increase and reduce the resistance.

[0031] The upper clamp 2 is arranged in a circular ring shape, and its inner diameter is 3-5 mm larger than the diameter of the C-shaped weakening groove 13. The lower clamp 3 is arranged in a circular ring shape, and its inner diameter is 3-5 mm smaller than the diameter of the C-shaped annular gap 14, so as to achieve the supporting effect on the flat plate grooved bursting disc 11. The pressure relief capacity of the flat plate grooved bursting disc assembly 1 is determined by the caliber of the lower clamp 3.

[0032] The C-shaped annular seam 14, the anti-fragmentation connection structure 15 and the flow holes 17 on the flat support plate 12 can all be processed by laser cutting. The diameter and number of the flow holes 17 are proportional to the discharge area, medium pressure increase rate and bursting pressure of the flat grooved bursting disc 11, and can be calculated by fluid mechanics. Usually, when the caliber is not large, 4-6 through holes with a diameter of 4-6 mm are used.

[0033] The inner diameter of the upper clamp 2, the inner diameter of the lower clamp 3, the diameter of the C-shaped weakening groove 13, and the diameter of the C-shaped annular gap 14 are all proportional to the rated discharge volume, and can be determined based on the rated discharge volume and the matching dimensions between the various parts, and the outer diameter of each component is related to the sealing surface of the clamping flange.

[0034] The bursting disc of the present invention is suitable for overpressure relief of gas and liquid media, and can achieve zero fragmentation and full-channel opening; the C-shaped weakening groove of the flat plate with grooves for controlling the bursting pressure can be cracked along the annular groove to form a full-channel discharge port during explosion, thereby ensuring the pressure relief efficiency; the C-shaped annular seam on the back-pressure-resistant flat support plate has a diameter 2-4mm smaller than the diameter of the C-shaped weakening groove, thereby ensuring that the support plate opens along the seam and passes through the upper C-shaped groove bursting disc, thereby ensuring that the discharge channel is fully opened; the flat plate with grooves bursting disc and the flat support plate are densely spot welded to ensure that there are no fragments of the bursting disc during explosion; the matching relationship in diameter between the inner diameter of the upper and lower clamps and the C-shaped groove on the bursting disc and the C-shaped annular seam on the flat support plate can ensure that the product is resistant to high back pressure and the full-channel is opened.

[0035] Although the embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, it can be understood by ordinary technicians in this field that all other embodiments obtained by making various changes, modifications, substitutions and variations to these embodiments without departing from the principles and spirit of the present invention and without making creative work, all belong to the scope of protection of the present invention.

Claims

1. A flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief, characterized in that: The invention comprises a flat plate with groove bursting disc assembly (1), an upper clamp (2) arranged on the upper side thereof and a lower clamp (3) arranged on the lower side thereof; the flat plate with groove bursting disc assembly (1) comprises an upper flat plate with groove bursting disc (11) and a lower flat support plate (12); the flat plate with groove bursting disc (11) is provided with a C-shaped weakening groove (13); and the flat support plate (12) is provided with a C-shaped annular seam (14) and an anti-fragmentation connection structure (15).

2. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 1 is characterized in that: The flat plate with groove bursting disc (11) is spot welded tightly into one piece between the inner part of the C-shaped weakening groove (13) and the flat support plate (12) using a resistance spot welding machine, and the number of welding points (16) is determined according to the bursting pressure and the strength of the welding points. The greater the bursting pressure, the more welding points (16) are required, and the greater the strength of the welding points, the fewer welding points (16) are required.

3. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 2 is characterized in that: The flat support plate (12) is provided with a plurality of flow holes (17) penetrating therethrough, and the diameter and number of the flow holes (17) are proportional to the discharge area, medium pressure increase rate and bursting pressure of the flat plate grooved bursting disc (11).

4. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 3 is characterized in that: The number of the flow holes (17) is 4-6, and the diameter is 4-6 mm.

5. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 4 is characterized in that: The diameter of the C-shaped weakening groove (13) is 2-4 mm larger than the diameter of the C-shaped annular gap (14).

6. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 5 is characterized in that: The upper clamp (2) is arranged in a circular ring shape, and its inner diameter is 3-5 mm larger than the diameter of the C-shaped weakening groove (13); the lower clamp (3) is arranged in a circular ring shape, and its inner diameter is 3-5 mm smaller than the diameter of the C-shaped annular gap (14).

7. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 6, characterized in that: The C-shaped weakening groove (13) is formed by pressing with an annular groove pressing die or by other precision machine tool processing; the remaining depth of the C-shaped weakening groove (13) is proportional to the bursting pressure.

8. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 7 is characterized in that: The C-shaped annular seam (14), the anti-fragmentation connection structure (15) and the flow hole (17) on the flat support plate (12) are all formed by laser cutting.

9. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 8, characterized in that: The back pressure resistance of the flat support plate (12) is proportional to the plate thickness.

10. The flat plate with groove type bursting disc device with high back pressure resistance and full channel pressure relief according to claim 8, characterized in that: The pressure relief capacity of the flat-plate grooved bursting disc assembly (1) is proportional to the caliber of the lower holder (3).

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