Low-pressure reverse-arch precise bursting disc device

Abstract

The utility model relates to a kind of low-pressure reverse-arch precise bursting disc device, including reverse-arch diaphragm and reinforcing support ring, its technical key points are: reverse-arch diaphragm is composed of spherical crown reverse-arch structure, clamping portion located in the outer periphery of spherical crown reverse-arch structure, the ratio of arch height and diameter of spherical crown reverse-arch structure is 1:6, the convex side dome top center of spherical crown reverse-arch structure is equipped with weak concave point, the concave side of spherical crown reverse-arch structure is equipped with annular score groove, the groove depth of annular score groove is 60%~70% of reverse-arch diaphragm thickness, reinforcing support ring and the clamping portion of reverse-arch diaphragm are fixedly connected and located on the concave side of reverse-arch diaphragm, the inner edge of reinforcing support ring is equipped with the baffle corresponding to the root of annular score groove and the tooth profile structure corresponding to the top of annular score groove. The device realizes that bursting pressure error is ≤±5% by optimizing arch structure and score design, with the characteristics of accurate control of bursting pressure, high sealing property and long cycle life.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure vessel safety relief devices, specifically to a low-pressure anti-arching precision rupture disc device, suitable for low pressure ranges of 0.1-0.3 MPa. Background Technology

[0002] A rupture disc is a safety device that rapidly ruptures under a set pressure to achieve overpressure protection. Rupture discs can generally be divided into two types: positive arch type and negative arch type.

[0003] Traditional positive-arch rupture discs have the following problems under low-pressure conditions: 1. Large rupture pressure deviation: In the low-pressure range (≤0.3 MPa), the rupture accuracy is difficult to control due to the significant influence of material thickness and molding process; 2. Poor fatigue resistance: Creep is prone to occur under pressure fluctuations, leading to premature rupture. While reverse-arch rupture discs have advantages in fatigue resistance, existing structures still suffer from large rupture pressure dispersion and high manufacturing costs in low-pressure scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a low-pressure anti-arch precision rupture disc device that solves the above problems, has a reasonable structure, is reliable in use, and achieves a rupture pressure error of ≤±5% by optimizing the arch structure and the notch design. It has the characteristics of precise control of rupture pressure and long cycle life.

[0005] The technical solution of this utility model is: A low-pressure anti-arch precision rupture disc device includes an anti-arch diaphragm and a reinforcing support ring. The key technical features are: the anti-arch diaphragm consists of a spherical crown-shaped anti-arch structure and a clamping portion located on the outer periphery of the spherical crown-shaped anti-arch structure; the ratio of the arch height to the diameter of the spherical crown-shaped anti-arch structure is 1:6; a weak concave point is provided at the center of the arch apex on the convex side of the spherical crown-shaped anti-arch structure; an annular groove is provided on the concave side of the spherical crown-shaped anti-arch structure; the groove depth is 60%–70% of the thickness of the anti-arch diaphragm; the reinforcing support ring is fitted and fixed to the clamping portion of the anti-arch diaphragm and located on the concave side of the anti-arch diaphragm; the inner edge of the reinforcing support ring has a baffle corresponding to the root of the annular groove and a toothed structure corresponding to the top of the annular groove.

[0006] In the aforementioned low-pressure anti-arch precision rupture disc device, the width of the annular groove is ≤0.1 mm.

[0007] In the aforementioned low-pressure anti-arch precision rupture disc device, the anti-arch diaphragm is a 316L stainless steel diaphragm, and the reinforcing support ring is a 316L stainless steel ring.

[0008] The beneficial effects of this utility model are: 1. By optimizing the ratio of the arch height to the diameter of the inverted arch diaphragm, the depth of the notch, and the weak point design, the arch structure and notch design are improved. Furthermore, through the synergistic effect with the reinforcing support ring, the influence of residual material stress on the burst pressure is reduced, achieving high-precision control of the burst pressure with a pressure error of ≤±5%.

[0009] 2. The design of the weak concave points of the anti-arched diaphragm allows for the selection of thicker diaphragm raw materials in the early stages of production, suppresses plastic deformation, has good resistance to fluctuation fatigue, and increases cycle life by more than 2 times.

[0010] 3. The design of the toothed structure of the reinforced support ring allows the inverted arch diaphragm to open along the ring groove after being pressed and flipped, constraining the flipping deformation, further ensuring low-pressure accuracy and allowing the rupture disc to fully open.

[0011] 4. The design of the weak concave points of the inverted arch diaphragm allows for the selection of thicker diaphragm raw materials in the early stages of production. The thicker diaphragm makes the scoring processable, and precise grooving can be achieved using molds, making it suitable for mass production and reducing production costs. Attached Figure Description

[0012] Figure 1 This is an axial cross-sectional view of the present invention; Figure 2 yes Figure 1 Top view; Figure 3 This is an axial cross-sectional view of the anti-arch diaphragm of this utility model; Figure 4 yes Figure 3 Top view.

[0013] In the figure: 1. Anti-arched diaphragm, 101. Weak point, 102. Annular groove, 2. Reinforcing support ring, 201. Toothed structure, 202. Baffle. Detailed Implementation

[0014] The present invention will be described in detail with reference to the accompanying drawings.

[0015] like Figures 1-4 As shown, the low-pressure anti-arch precision rupture disc device includes an anti-arch diaphragm 1 and a reinforcing support ring 2.

[0016] The anti-arch diaphragm 1 is composed of a spherical crown-shaped anti-arch structure and a clamping part disposed on the outer periphery of the spherical crown-shaped anti-arch structure.

[0017] The convex side of the spherical arch structure has a weak depression 101 at its center, and the concave side of the spherical arch structure has an annular groove 102. The groove depth of the annular groove 102 is 60% to 70% of the thickness of the arch-shaped diaphragm 1. The arch-shaped diaphragm 1 is a 316L stainless steel diaphragm.

[0018] The reinforcing support ring 2 is fixedly attached to the clamping part of the anti-arched diaphragm 1 and located on the concave side of the anti-arched diaphragm 1. The inner edge of the reinforcing support ring 2 is provided with a baffle 202 corresponding to the root of the annular groove 102 and a toothed structure 201 corresponding to the top of the annular groove 102. The reinforcing support ring 2 is a 316L stainless steel ring.

[0019] In this embodiment, the burst pressure is designed to be 0.15 MPa.

[0020] The inverted arch diaphragm 1 has a thickness of 0.15 mm, a diameter of 64 mm, an arch height of 11 mm (height-to-diameter ratio of 1:6), a diameter of 2 mm for the weak point 101, and a groove depth of 0.09 mm, a groove width of 0.08 mm, and a diameter of 50 mm for the annular groove 102. The reinforcing support ring 2 has a thickness of 1.5 mm. During assembly, the reinforcing support ring 2 is attached to the clamping part of the inverted arch diaphragm 1 and spot-welded for fixation.

[0021] Performance verification: Bursting pressure: 0.1425~0.1575 MPa, of which 3 samples were measured, with an average value of 0.147 MPa and a deviation of -2%.

[0022] Cycle life: It has not failed after 3000 cycles of pressure fluctuation within the range of 0 to 0.128 MPa.

[0023] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A low-pressure anti-arch precision rupture disc device, comprising an anti-arch diaphragm and a reinforcing support ring, characterized in that: The anti-arch diaphragm consists of a spherical crown-shaped anti-arch structure and a clamping part located on the outer periphery of the spherical crown-shaped anti-arch structure. The ratio of the arch height to the diameter of the spherical crown-shaped anti-arch structure is 1:

6. A weak concave point is provided at the center of the arch apex on the convex side of the spherical crown-shaped anti-arch structure. An annular groove is provided on the concave side of the spherical crown-shaped anti-arch structure. The groove depth is 60% to 70% of the thickness of the anti-arch diaphragm. The reinforcing support ring is fitted and fixed to the clamping part of the anti-arch diaphragm and is located on the concave side of the anti-arch diaphragm. The inner edge of the reinforcing support ring is provided with a baffle corresponding to the root of the annular groove and a toothed structure corresponding to the top of the annular groove.

2. The low-pressure anti-arch precision rupture disc device according to claim 1, characterized in that: The width of the annular groove is ≤0.1 mm.

3. The low-pressure anti-arch precision rupture disc device according to claim 1, characterized in that: The inverted arch diaphragm is a 316L stainless steel diaphragm, and the reinforcing support ring is a 316L stainless steel ring.

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