Groove type rupture disc anti-fragmentation structure

Abstract

This utility model discloses a grooved rupture disc anti-fragmentation structure, relating to the technical field of safety pressure relief devices. It includes a rupture disc and a reinforcing ring. Through an integrated interlocking design of the rupture disc and reinforcing ring, this utility model ensures that after rupture, fragments are 100% confined within the reinforcing ring's rib grid without the need for external clamps, completely eliminating the risk of fragmentation. It is suitable for large-diameter, high-pressure applications and combines high-precision rupture with fragment confinement. Based on a short-bridge and radially weakening groove collaborative detonation mechanism, the short bridge acts as a precise fracture trigger point, ensuring rupture pressure deviation. The quantitative matching of the weakening groove depth and the reinforcing rib tilt angle α maintains structural rigidity while achieving directional splitting. Furthermore, the reinforcing ring adopts a full-parameter matching design with the rupture disc, reducing customized processing steps and lowering operating costs. The reinforcing ribs symmetrically span across both sides of the weakening groove, forming a topologically interlocked pressure-resistant structure. The circular holes collaboratively release central stress, improving the stability of the rupture pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of safety pressure relief devices, specifically a grooved rupture disc anti-fragmentation structure. Background Technology

[0002] Rupture discs are commonly used in pressure vessels. When the working pressure inside the vessel unexpectedly increases, potentially causing damage, the rupture disc explodes, opening the vent and releasing pressure. Due to the unpredictability of rupture disc explosions, operators cannot avoid them in advance, leading to injuries when rupture discs are first introduced. In recent years, with increased national emphasis on safety and advancements in rupture disc technology, manufacturers now prohibit personnel from approaching the rupture disc during operation and ensure the pressure relief port faces the sky or uninhabited areas. Furthermore, manufacturers consider preventing fragmentation after explosion during the design phase, avoiding potential safety hazards such as flying debris or debris landing on the ground. Previous solutions for fragment-free rupture disc design involved incorporating anti-fragmentation structures into the clamps, such as blocks, baffles, barriers, and necking, which proved effective. However, for rupture discs without clamps, there is currently no clear solution for fragment-free design, especially for large-diameter, high-pressure grooved rupture discs, where fragmentation after explosion poses a significant safety hazard.

[0003] In summary, there is an urgent need to develop a grooved rupture disc anti-fragmentation structure that can simultaneously meet the core requirements of zero fragmentation, high blasting precision, and high-pressure, large-diameter compatibility without the need for a clamp. Utility Model Content

[0004] The purpose of this invention is to provide a grooved rupture disc anti-fragmentation structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a grooved rupture disc anti-fragmentation structure, comprising: a rupture disc and a reinforcing ring, wherein the reinforcing ring is tightly fitted to the non-pressure side of the rupture disc; the rupture disc includes: a central arched surface; a rupture disc sealing surface is provided on the outer periphery of the arched surface; several damping grooves are provided on the arched surface, the damping grooves extending from the outer edge of the arched surface towards the center, ending near the center of the arched surface; a short bridge is provided at the center of the arched surface, the outer edge of the short bridge connecting with each damping groove. The endpoints of the weak grooves coincide. The reinforcing ring includes: a central reinforcing ring arched surface, a reinforcing ring sealing surface on the outer periphery of the reinforcing ring arched surface, and several reinforcing ribs machined on the reinforcing ring arched surface. The reinforcing ribs extend from the outer edge of the reinforcing ring arched surface towards the center, and their ends terminate near the center of the reinforcing ring arched surface. A circular hole is provided at the center of the reinforcing ring arched surface. The outer edge of the circular hole coincides with the endpoint of each reinforcing rib extension. The number of reinforcing ribs is the same as the number of the weak grooves, and the reinforcing ribs symmetrically span across both sides of the corresponding weak groove.

[0006] Furthermore, the number of the weakening grooves is even, and they are evenly distributed radially along the arched surface of the rupture disc. The cross-section of the weakening grooves is V-shaped or U-shaped.

[0007] Furthermore, the short bridge is the area at the center of the arched surface of the rupture disc where the weakening groove has not been machined.

[0008] Furthermore, the depth of the weakening groove is 1 / 4 to 3 / 4 of the thickness of the rupture disc 1.

[0009] Furthermore, the outer diameter M of the reinforcing ring is 5-100 mm larger than the inner diameter of the reinforcing ring, the diameter N of the circular hole is 1 / 10 to 2 / 3 of the inner diameter of the reinforcing ring, and the angle α between the side of the reinforcing rib and the radial direction is 10 to 45°.

[0010] Furthermore, the outer diameter of the reinforcing ring is the same as the outer diameter of the rupture disc, and the inner diameter of the reinforcing ring is the same as the inner diameter of the rupture disc.

[0011] Furthermore, the height of the arched surface of the rupture disc is consistent with the height of the arched surface of the reinforcing ring.

[0012] Furthermore, the rupture disc sealing surface and the reinforcing ring sealing surface are one of a plane, a conical surface, or a tenon and groove surface, and both have the same shape.

[0013] Furthermore, the rupture disc and the reinforcing ring are connected by resistance welding or argon arc welding, with the welding position located at the edge area of ​​the outer circle or sealing surface of the rupture disc and the reinforcing ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the integrated interlocking design of the rupture disc and the reinforcing ring, ensures that the fragments after blasting are 100% constrained within the rib grid of the reinforcing ring without the need for external clamps, completely eliminating the risk of fragment splashing; it is especially suitable for large-diameter (DN300 and above) high-pressure (1-15MPa) working conditions. Tests have verified that the fragment ejection rate is 0, and it also takes into account both high-precision blasting and fragment constraint functions. Based on the collaborative detonation mechanism of short bridge and radial weakening groove, the short bridge serves as a precise fracture trigger point to ensure the blasting pressure deviation. The quantitative matching of the weakening groove depth and the inclination angle α of the reinforcing rib maintains structural rigidity while directional splitting. Furthermore, the reinforcing ring adopts a full parameter matching design with the rupture disc, reducing customized processing steps and lowering usage costs. The reinforcing ribs symmetrically span across both sides of the weakening groove to form a topological interlocking anti-compression structure. The circular holes collaboratively release the central stress, improving the stability of the blasting pressure. Finally, the sealing surface is compatible with flat / conical / tenon groove surfaces, directly replacing existing rupture discs without modifying the container interface. Attached Figure Description

[0015] Figure 1 This is the front view of the present utility model;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a top view of the rupture disc of this utility model;

[0018] Figure 4 This is a top view of the reinforcing ring of this utility model;

[0019] Figure 5 This is a perspective view of the present utility model;

[0020] Figure 6 This is a front view of the reinforcing ring of this utility model;

[0021] Figure 7 This is the main view of the rupture disc of this utility model;

[0022] In the diagram: 1. Rupture disc, 101. Rupture disc arched surface, 102. Rupture disc sealing surface, 103. Weakening groove, 104. Short bridge, 2. Reinforcing ring, 201. Reinforcing ring arched surface, 202. Reinforcing ring sealing surface, 203. Reinforcing rib, 204. Round hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figure 1-4This utility model provides a grooved rupture disc anti-fragmentation structure, including: a rupture disc 1 and a reinforcing ring 2. The reinforcing ring 2 is tightly fitted to the non-pressure side of the rupture disc 1. The rupture disc 1 includes: a central rupture disc arched surface 101; a rupture disc sealing surface 102 on the outer periphery of the rupture disc arched surface 101; several damping grooves 103 on the rupture disc arched surface 101; the damping grooves 103 extending from the outer edge of the rupture disc arched surface 101 towards the center, ending near the center of the rupture disc arched surface 101; and a short bridge 104 at the center of the rupture disc arched surface 101, the outer edge of which coincides with the end point of each damping groove 103. The reinforcing ring 2 includes: a central reinforcing ring arched surface 201, a reinforcing ring sealing surface 202 on the outer periphery of the reinforcing ring arched surface 201, and several reinforcing ribs 203 machined on the reinforcing ring arched surface 201. The reinforcing ribs 203 extend from the outer edge of the reinforcing ring arched surface 201 toward the center and end near the center of the reinforcing ring arched surface 201. A circular hole 204 is provided at the center of the reinforcing ring arched surface 201. The outer edge of the circular hole 204 coincides with the end point of the extension of each reinforcing rib 203. The number of reinforcing ribs 203 is the same as the number of weakening grooves 103, and the reinforcing ribs 203 symmetrically span across both sides of the corresponding weakening grooves 103.

[0025] In this design, the weakening groove 103 pre-fabricates the fracture path on the rupture disc and is staggered with the reinforcing rib 203 to form a "groove-rib interlocking" structure. This structure guides crack propagation in a directional manner, preventing random fragmentation. The reinforcing rib 203 provides local rigid support, bridging both sides of the weakening groove to form a mechanical barrier that physically prevents fragments from scattering and confines them within the rib grid. The short bridge 104, located in the central ungrooved area, forms the weakest point, corresponding to the position of the circular hole 204, constituting a "central stress control zone." This ensures that the blasting starts from the center, controlling the detonation position. The circular hole 204 releases the central stress of the reinforcing ring and works in conjunction with the short bridge 104. After the short bridge breaks, the circular hole provides a pressure relief channel and limits the size of the central fragments, preventing fragmentation in the central area and accelerating pressure relief. The consistent height of the arched surfaces ensures that the curvature of the rupture disc and the reinforcing ring matches, allowing the two components to fit together completely and distribute stress evenly, preventing accidental premature detonation caused by local stress concentration. Through the integrated design of the rupture disc and the reinforcing ring, fragment constraint without clamps is achieved.

[0026] The number of the weakening grooves 103 is even, and they are evenly distributed radially along the arched surface 101 of the rupture disc. The cross-section of the weakening grooves 103 is V-shaped or U-shaped.

[0027] Even-numbered uniform distribution ensures that the split "petals" after blasting flip symmetrically, while odd-numbered distribution will lead to eccentric loading. V-shaped or U-shaped sections are more likely to cause stress concentration than rectangular grooves, which can accurately control the crack propagation rate, significantly improve the controllability of blasting, and make the fragment size more uniform.

[0028] The short bridge 104 is the area at the center of the arched surface 101 of the rupture disc where the weakening groove 103 has not been machined.

[0029] The short bridge is a complete material area preserved in the center of the arched surface, and is not an additional structure.

[0030] The depth of the weakening groove 103 is 1 / 4 to 3 / 4 of the thickness of the rupture disc 1.

[0031] The outer diameter M of the reinforcing ring is 5-100 mm larger than the inner diameter of the reinforcing ring. The diameter N of the circular hole 204 is 1 / 10 to 2 / 3 of the inner diameter of the reinforcing ring. The angle α between the side of the reinforcing rib and the radial direction is 10 to 45°.

[0032] The outer diameter of the reinforcing ring 2 is the same as the outer diameter of the rupture disc 1, and the inner diameter of the reinforcing ring is the same as the inner diameter of the rupture disc, ensuring that the rupture disc and the edge of the reinforcing ring are seamlessly connected and the sealing surfaces are completely overlapped, eliminating assembly gaps and avoiding pressure leakage or local stress.

[0033] The height of the rupture disc arch surface 101 is the same as the height of the reinforcing ring arch surface 201.

[0034] The rupture disc sealing surface 102 and the reinforcing ring sealing surface 202 are either flat, conical, or tongue and groove, and both have the same shape to ensure that there is no assembly interference between the rupture disc, the reinforcing ring, and the container.

[0035] The rupture disc 1 and the reinforcing ring 2 are connected by resistance welding or argon arc welding, and the welding position is located at the edge area of ​​the outer circle or sealing surface of the rupture disc 1 and the reinforcing ring 2.

[0036] When using this utility model, first align and attach the rupture disc 1 and the reinforcing ring 2 to ensure that the height of the arched surface 101 of the rupture disc and the arched surface 201 of the reinforcing ring are consistent, and the shape of the sealing surface 102 of the rupture disc and the sealing surface 202 of the reinforcing ring are perfectly matched. The shape can be a plane, a conical surface, a tenon groove, etc. The number of weakening grooves 103 and the reinforcing ribs 203 are the same and their positions correspond. The reinforcing ribs span across both sides of the weakening grooves and are welded to the outer circle or edge area of ​​the sealing surface by resistance welding or argon arc welding, so that the reinforcing ring 2 is permanently fixed to the non-pressure side of the rupture disc 1, that is, the side facing away from the inside of the container. During the normal operation of the rupture disc, the rupture disc 1 bears the pressure inside the container, and the arched surface 101 protrudes towards the non-pressure side. The reinforcing ribs 203 of the reinforcing ring 2 provide rigid support, constrain the deformation of the rupture disc, and prevent accidental breakage. The short bridge 104 and the round hole 204 maintain the structural center integrity. During the overpressure rupture stage, when the pressure exceeds the critical value, the weakest short bridge 104 at the center of the rupture disc breaks first, forming the initial rupture. Stress then radiates radially along the weakening groove 103 towards the edge, dividing the arched surface into multiple "petal"-shaped segments. The reinforcing ribs 203 of the reinforcing ring 2 symmetrically span across both sides of the weakening groove, preventing fragments from flying out. The petal-shaped segments are mechanically blocked by the reinforcing ribs 203, only folding outwards and unable to detach from the reinforcing ring. The circular hole 204 ensures smooth pressure relief at the central rupture while limiting fragment size. The petals of the rupture disc are completely constrained by the reinforcing ring 203, and pressure is released through the central rupture and the gaps between the segments. No metal fragments fly out; only the medium, gas or liquid, is safely released along the designed direction, such as towards the sky.

[0037] Although 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, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A grooved rupture disc anti-fragmentation structure, characterized in that, include: A rupture disc (1) and a reinforcing ring (2), wherein the reinforcing ring (2) is tightly fitted to the non-pressure side of the rupture disc (1), the rupture disc (1) includes: a central rupture disc arched surface (101), a rupture disc sealing surface (102) provided on the outer periphery of the rupture disc arched surface (101), and several weakening grooves (103) provided on the rupture disc arched surface (101), the weakening grooves (103) extending from the outer edge of the rupture disc arched surface (101) towards the center, and ending near the center of the rupture disc arched surface (101), and a short bridge (104) provided at the center of the rupture disc arched surface (101), the outer edge of the short bridge (104) coinciding with the end point of each weakening groove (103), the reinforcing ring (2) includes: a central The reinforcing ring arch surface (201) has a reinforcing ring sealing surface (202) on its outer periphery. Several reinforcing ribs (203) are machined on the reinforcing ring arch surface (201). The reinforcing ribs (203) extend from the outer edge of the reinforcing ring arch surface (201) towards the center and end near the center of the reinforcing ring arch surface (201). A circular hole (204) is provided at the center of the reinforcing ring arch surface (201). The outer edge of the circular hole (204) coincides with the end point of the extension of each reinforcing rib (203). The number of reinforcing ribs (203) is the same as the number of weakening grooves (103), and the reinforcing ribs (203) are symmetrically connected across the two sides of the corresponding weakening grooves (103).

2. The grooved rupture disc anti-fragmentation structure according to claim 1, characterized in that, The number of the weakening grooves (103) is even, and they are evenly distributed radially along the arched surface (101) of the rupture disc. The cross-section of the weakening grooves (103) is V-shaped or U-shaped.

3. The grooved rupture disc anti-fragmentation structure according to claim 1, characterized in that, The short bridge (104) is the area at the center of the arched surface (101) of the rupture disc where the weakening groove (103) has not been machined.

4. The grooved rupture disc anti-fragmentation structure according to claim 2, characterized in that, The depth of the weakening groove (103) is 1 / 4 to 3 / 4 of the thickness of the rupture disc (1).

5. The grooved rupture disc anti-fragmentation structure according to claim 1, characterized in that, The outer diameter M of the reinforcing ring is 5-100 mm larger than the inner diameter of the reinforcing ring. The diameter N of the circular hole (204) is 1 / 10 to 2 / 3 of the inner diameter of the reinforcing ring. The angle α between the side of the reinforcing rib and the radial direction is 10 to 45°.

6. The grooved rupture disc anti-fragmentation structure according to claim 1, characterized in that, The outer diameter of the reinforcing ring (2) is the same as the outer diameter of the rupture disc (1), and the inner diameter of the reinforcing ring is the same as the inner diameter of the rupture disc.

7. The grooved rupture disc anti-fragmentation structure according to claim 6, characterized in that, The height of the rupture disc arch surface (101) is consistent with the height of the reinforcing ring arch surface (201).

8. The grooved rupture disc anti-fragmentation structure according to claim 7, characterized in that, The rupture disc sealing surface (102) and the reinforcing ring sealing surface (202) are either flat, conical, or tongue and groove, and both have the same shape.

9. The grooved rupture disc anti-fragmentation structure according to claim 1, characterized in that, The rupture disc (1) and the reinforcing ring (2) are connected by resistance welding or argon arc welding, and the welding position is located on the outer circle or edge area of ​​the sealing surface of the rupture disc (1) and the reinforcing ring (2).

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