A high-pressure anti-arch cross-slot rupture disc clamping structure with no fragments and low flow resistance

Abstract

This utility model discloses a fragment-free, low-flow-resistance high-pressure anti-arch cross-groove rupture disc clamping structure, relating to the field of rupture disc technology. It includes an upper clamp, an anti-arch cross-groove rupture disc assembly, and a lower clamp. The upper clamp's inner cavity adopts a tapered structure with a larger lower section and a smaller upper section. After the rupture disc actuates, its fractured portion first impacts the tapered inclined surface and is forced inward, preventing root tearing and fragment ejection. The rupture disc's arched surface convexes downward, and the upper and lower clamp's convex rings form a circumferential flow channel. After the rupture disc rolls up, it adheres to the tapered inclined surface without blocking the channel. The main components are machined from conventional stainless steel forgings, eliminating the need for expensive materials or complex processes, resulting in good economic efficiency. This utility model surpasses existing technologies in multiple dimensions, including high pressure, fragment-free operation, low flow resistance, and ease of maintenance. It can be widely applied in critical applications such as hydrogenation reactors, high-pressure storage tanks, and supercritical fluid pipelines, offering significant economic and social benefits.

Description

Technical Field

[0001] This utility model relates to the field of rupture disc technology, specifically a high-pressure anti-arch cross groove rupture disc clamping structure with no fragments and low flow resistance. Background Technology

[0002] Rupture discs are among the most important overpressure protection components in pressure vessels and pipelines in fields such as chemical engineering, petrochemicals, metallurgy, nuclear power, and aerospace. With the increasing size and pressure of equipment and the increasingly stringent environmental and safety regulations, higher requirements are being placed on the "zero fragmentation" and "low flow resistance" of rupture discs after activation.

[0003] The currently widely used "straight-through" clamping structure has the following inherent defects:

[0004] 1. High risk of fragmentation: When the anti-arch rupture disc becomes unstable under high pressure, its root is easily sheared along the clamping ring surface, resulting in high-speed flying fragments, which pose a risk of secondary damage and equipment blockage.

[0005] 2. High flow resistance: The inner cavity of the gripper is a straight hole of equal diameter. After the rupture disc is activated, the rolled-up rupture disc tends to accumulate in the center of the inner cavity, resulting in a sharp reduction in the effective flow area and a significant pressure drop.

[0006] 3. Unreliable positioning: Traditional clamps rely solely on the flat end face for clamping without circumferential limiting. Under temperature cycling or vibration conditions, they are prone to loosening and eccentricity, leading to premature bursting or seal failure.

[0007] 4. Inconvenient installation / maintenance: There is no dedicated pull ring, and the entire unit must be disassembled when replacing the rupture disc, resulting in a long maintenance cycle.

[0008] Therefore, developing a new clamping structure that can meet the "zero-fragmentation" requirement under high-pressure conditions while maintaining low flow resistance and easy maintenance has become a technical challenge that the industry urgently needs to solve. Utility Model Content

[0009] The purpose of this invention is to provide a high-pressure anti-arch cross-groove rupture disc clamping structure with no fragments and low flow resistance, so as to solve the problems of high fragmentation risk, large flow resistance, unreliable positioning, and inconvenient installation / maintenance of the traditional rupture disc straight-through clamping structure mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a fragment-free, low-flow-resistance high-pressure anti-arch cross-groove rupture disc clamping structure, comprising an upper clamp, an anti-arch cross-groove rupture disc assembly, and a lower clamp arranged sequentially from top to bottom; the upper clamp includes an upper clamp body with a downwardly protruding upper clamp ring on its bottom surface near its inner ring, and a reduced-diameter portion on the upper part of the inner wall of the upper clamp body, with a reduced-diameter inclined surface between the bottom end of the inner wall of the reduced-diameter portion and the inner wall of the upper clamp body; the anti-arch cross-groove rupture disc assembly includes an annular rupture disc outer ring, with a downwardly protruding rupture disc arch surface fixedly connected to the inner ring of the rupture disc outer ring, and multiple weakening grooves machined on the top surface of the rupture disc arch surface; the lower clamp includes an annular lower clamp body with an upwardly protruding lower clamp ring on its top surface near its outer edge.

[0011] Preferably, the outer wall of the upper clamping body has radially recessed upper clamping screw holes at both ends of the same diameter, and upper clamping bolts are threaded on there; the outer wall of the lower clamping body has radially recessed lower clamping screw holes at both ends of the same diameter perpendicular to the diameter of the default location of the lower clamping ring, and lower clamping bolts are threaded on there.

[0012] Preferably, one side of the lower clamping ring is left unset, and a rupture disc pull ring extending outward is provided on the side of the outer ring of the rupture disc. The rupture disc pull ring extends outward to the outside of the clamping device through the notch left after the lower clamping ring is left unset.

[0013] Preferably, the outer diameter of the upper clamping body is equal to the outer diameter of the lower clamping body; the inner diameter of the upper clamping body is smaller than the inner diameter of the lower clamping body; and the inner diameter of the lower clamping ring is equal to the outer diameter of the upper clamping ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Completely achieves "zero debris": The inner cavity of the upper gripper adopts a tapered structure with a larger bottom and a smaller top. After the rupture disc is activated, its cracked part first impacts the tapered inclined surface and is forced to retract inward, preventing root tearing and debris from flying out. After 10MPa and 100 cycles of operation, no metal fragments with a size ≥0.5mm were detected, meeting the most stringent requirements of API, ISO and domestic TSG21-2016 for "zero debris".

[0016] 2. Low flow resistance and high emission capacity: The rupture disc arch surface is convex downward, and the upper and lower clamping rings form a circumferential flow channel. After the rupture disc rolls up, it adheres to the narrowed inclined surface without blocking the channel. The measured exhaust flow area after rupture is ≥85% of the original cross-sectional area, and the pressure drop is reduced by 30% to 45%, which is significantly better than the straight-through structure.

[0017] 3. Self-alignment and anti-loosening: The upper and lower clamping rings form a double positioning of "outer ring - inner ring", which, together with the radial locking of the upper clamping bolt and the lower clamping bolt, achieves uniform clamping in a 360° circumferential direction. Under long-term vibration and temperature alternation (-196℃~400℃) conditions, the sealing pressure remains constant and the burst pressure deviation is ≤±2%.

[0018] 4. High versatility and low cost: This structure can be matched with the full range of anti-arch cross groove rupture discs from DN25 to DN400. Only the height of the convex ring needs to be adjusted. The main parts are made of conventional stainless steel forgings, which do not require expensive materials or complex processes, and are economical.

[0019] In summary, this invention surpasses existing technologies in multiple dimensions, including high pressure, no debris, low flow resistance, and ease of maintenance. It can be widely applied in key applications such as hydrogenation reactors, high-pressure storage tanks, and supercritical fluid pipelines, and has significant economic and social benefits. Attached Figure Description

[0020] Figure 1 This is a top view of the present invention;

[0021] Figure 2 for Figure 1 The structure is integrated;

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

[0023] Figure 4 for Figure 3 Structural diagram;

[0024] In the diagram: Upper clamp-1, Upper clamp body-11, Upper clamp protruding ring-12, Reduced diameter section-13, Reduced diameter inclined surface-14, Upper clamping screw hole-15, Upper clamping bolt-16, Anti-arch cross groove rupture disc assembly-2, Rupture disc outer ring-21, Rupture disc arch surface-22, Rupture disc pull ring-23, Lower clamp-3, Lower clamp body-31, Lower clamp protruding ring-32, Lower clamp screw hole-33, Lower clamping bolt-34, Clamp connecting piece-4. Detailed Implementation

[0025] 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.

[0026] Please refer to Figure 1-4 , Figure 1 This is a top view of the present invention; Figure 2 for Figure 1 The structure is integrated; Figure 3 for Figure 1 Sectional view of AA; Figure 4 for Figure 3 Structural diagram.

[0027] This utility model provides a fragmentless, low-flow-resistance high-pressure anti-arch cross-groove rupture disc clamping structure, which includes an upper clamp 1, an anti-arch cross-groove rupture disc assembly 2, and a lower clamp 3 arranged sequentially from top to bottom.

[0028] The upper clamp 1 includes an upper clamp body 11. A downwardly protruding upper clamp ring 12 is provided on the bottom surface of the upper clamp body 11 near its inner diameter. A diameter reduction portion 13 is provided on the upper part of the inner wall of the upper clamp body 11. A diameter reduction inclined surface 14 is provided between the bottom end of the inner wall of the diameter reduction portion 13 and the inner wall of the upper clamp body 11. Radially concave upper clamping screw holes 15 are respectively provided at both ends of the same diameter on the outer wall of the upper clamp body 11, and upper clamping bolts 16 are threadedly installed.

[0029] The anti-arch cross groove rupture disc assembly 2 includes an annular rupture disc outer ring 21, and a downwardly convex rupture disc arch surface 22 is fixedly provided at the inner ring of the rupture disc outer ring 21. Multiple weakening grooves are machined on the top surface of the rupture disc arch surface 22. A rupture disc pull ring 23 extending outward is provided at the side of the rupture disc outer ring 21.

[0030] The lower clamp 3 includes a ring-shaped lower clamp body 31, and a protruding lower clamp ring 32 is provided on the top surface near its outer edge; one side of the lower clamp ring 32 is left unset, and the rupture disc pull ring 23 extends out to the outside of the clamp through the unset notch; the outer wall of the lower clamp body 31 has radially concave lower clamp screw holes 33 at both ends of the same diameter perpendicular to the diameter of the unset lower clamp ring 32, and lower clamp bolts 34 are threaded on them.

[0031] The outer diameter of the upper clamp body 11 is equal to the outer diameter of the lower clamp body 31; the inner diameter of the upper clamp body 11 is smaller than the inner diameter of the lower clamp body 31; the inner diameter of the lower clamp convex ring 32 is equal to the outer diameter of the upper clamp convex ring 12.

[0032] A clamping connector 4 is provided between the upper clamping bolt 16 and the corresponding lower clamping bolt 34.

[0033] 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 fragment-free, low-flow-resistance high-pressure anti-arch cross-groove rupture disc clamping structure, characterized in that: The assembly includes, from top to bottom, an upper clamp (1), a reverse arch cross groove rupture disc assembly (2), and a lower clamp (3). The upper clamp (1) includes an upper clamp body (11) and a downwardly protruding upper clamp ring (12) on its bottom surface near its inner ring. A reduced diameter section (13) is provided on the upper part of the inner wall of the upper clamp body (11), and a reduced diameter oblique section is provided between the bottom end of the inner wall of the reduced diameter section (13) and the inner wall of the upper clamp body (11). Surface (14); The anti-arch cross groove rupture disc assembly (2) includes an annular rupture disc outer ring (21), and a downwardly protruding rupture disc arch surface (22) is fixedly provided at the inner ring of the rupture disc outer ring (21). Multiple weakening grooves are machined on the top surface of the rupture disc arch surface (22); The lower clamp (3) includes an annular lower clamp body (31), and an upwardly protruding lower clamp convex ring (32) is provided on the top surface near its outer edge.

2. The fragment-free, low-flow-resistance high-pressure anti-arch cross-groove rupture disc clamping structure according to claim 1, characterized in that: The outer wall of the upper clamping body (11) is provided with radially concave upper clamping screw holes (15) at both ends of the same diameter, and upper clamping bolts (16) are threaded on them; the outer wall of the lower clamping body (31) is provided with radially concave lower clamping screw holes (33) at both ends of the same diameter perpendicular to the diameter of the default position of the lower clamping ring (32), and lower clamping bolts (34) are threaded on them.

3. The fragment-free, low-flow-resistance high-pressure anti-arch cross-groove rupture disc clamping structure according to claim 2, characterized in that: The lower clamping ring (32) is set to default on one side, and the outer ring (21) of the rupture disc is provided with a rupture disc pull ring (23) extending outward at the side. The rupture disc pull ring (23) extends outward to the outside of the clamping device through the notch after the lower clamping ring (32) is set to default.

4. The high-pressure anti-arch cross-groove rupture disc clamping structure with no fragments and low flow resistance according to claim 3, characterized in that: The outer diameter of the upper clamp body (11) is equal to the outer diameter of the lower clamp body (31); the inner diameter of the upper clamp body (11) is smaller than the inner diameter of the lower clamp body (31); the inner diameter of the lower clamp convex ring (32) is equal to the outer diameter of the upper clamp convex ring (12).

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