Double-system high back pressure function rupture disc

Abstract

The utility model relates to a kind of double-system high back pressure function burst disc, including clamping mechanism and double-function system, its technical key points are: double-function system is composed of main pressure-bearing burst disc and back pressure protection support piece, main pressure-bearing burst disc is the flat plate shape burst disc with weakening groove, back pressure protection support piece is the flat plate support piece with multiple pressure guide through holes, weakening groove of flat plate shape burst disc is located at its back pressure side surface, the other side surface of flat plate shape burst disc and flat plate support piece are closely pasted, flat plate shape burst disc and flat plate support piece are concentrically arranged, each pressure guide through hole is evenly arranged around the center line of flat plate support piece in matrix, weakening groove of flat plate shape burst disc and each pressure guide through hole are not overlapped arrangement.The utility model solves the problem that existing flat plate with grooved burst disc cannot be reliably discharged after bearing high back pressure working condition, can effectively resist the influence of downstream back pressure, ensure that main burst disc accurately acts under preset positive pressure, and high reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of overpressure protection safety devices for pressure vessels and pipeline systems, specifically to a dual-system high back pressure functional rupture disc. It is suitable for normal operation under high back pressure (outlet side pressure) conditions, preventing premature failure or performance distortion due to back pressure. Background Technology

[0002] A rupture disc device is a disposable overpressure relief safety device. When the system pressure exceeds a predetermined value, the rupture disc ruptures or opens instantly to release pressure and protect pressure-bearing equipment.

[0003] However, traditional flat-plate rupture discs have a significant weakness: they are sensitive to back pressure. When pressure (i.e., back pressure) exists on the outlet side (downstream) of the rupture disc, this back pressure acts on the pressure relief surface of the rupture disc. As the back pressure increases, it stretches the rupture disc. When the back pressure reaches a certain level, the rupture disc may break along the groove. This breakage is unpredictable and poses a serious safety hazard.

[0004] To address back pressure issues, existing technologies typically employ a series connection of multiple rupture discs. However, this approach is structurally complex, space-consuming, costly, and introduces potential leakage points. Another solution involves using a complex inverted arch rupture disc with a cutting tool assembly, but this structure is also expensive and cannot withstand high back pressures. Utility Model Content

[0005] The purpose of this invention is to provide a dual-system high back pressure functional rupture disc with a compact structure, reduced operating costs, and effective resistance to the effects of high back pressure. It solves the problem that existing flat grooved rupture discs cannot reliably release pressure under high back pressure conditions. It can effectively resist the influence of downstream back pressure, ensuring that the main rupture disc operates accurately under a preset positive pressure, and has high reliability.

[0006] The technical solution of this utility model is: A dual-system high back pressure functional rupture disc includes a clamping mechanism and a dual-function system. The key technical features are: the dual-function system consists of a main pressure-bearing rupture disc and a back pressure protection support. The main pressure-bearing rupture disc is a flat plate-shaped rupture disc with a pressure-reducing groove. The back pressure protection support is a flat plate support with multiple pressure-guiding holes. The pressure-reducing groove of the flat plate-shaped rupture disc is located on its back pressure side surface. The other side surface of the flat plate-shaped rupture disc is in close contact with the flat plate support. The flat plate-shaped rupture disc and the flat plate support are concentrically arranged, and the pressure-guiding holes are evenly arranged in a matrix around the center line of the flat plate support. The pressure-reducing groove of the flat plate-shaped rupture disc does not overlap with the pressure-guiding holes.

[0007] In the aforementioned dual-system high back pressure rupture disc, the centerline of the pressure guiding through hole is parallel to the centerline of the flat plate support.

[0008] In the aforementioned dual-system high back pressure functional rupture disc, the weakening groove is a cross-shaped groove, and the center of the cross-shaped groove is located on the center line of the flat plate support.

[0009] The aforementioned dual-system high back pressure functional rupture disc includes a clamping mechanism comprising a pressure-side connecting flange, a back pressure-side connecting flange, and a screw assembly connecting the edges of the pressure-side connecting flange and the back pressure-side connecting flange. An annular clamping space corresponding to the dual-function system is formed between the opposing surfaces of the pressure-side connecting flange and the back pressure-side connecting flange. An annular sealing groove is provided on the outer circumferential surface of the flat plate support, and a sealing ring that is in close contact with the side wall of the annular clamping space is provided in the annular sealing groove.

[0010] In the aforementioned dual-system high back pressure functional rupture disc, the diameter of the central through hole of the back pressure side connecting flange is larger than the diameter of the central through hole of the pressure side connecting flange.

[0011] In the aforementioned dual-system high back pressure functional rupture disc, the flat plate support has the same outer diameter as the flat plate rupture disc.

[0012] The beneficial effects of this utility model are: 1. This utility model adopts a dual-function system, namely a main pressure-bearing rupture disc and a back pressure protection support. The main pressure-bearing rupture disc is prefabricated with a weakening groove to determine the cracking mode and pressure accuracy during rupture. As the main pressure-bearing rupture disc, it is responsible for accurately rupturing and releasing pressure when the system is overpressured. When the back pressure is too high, the back pressure protection support provides reverse support to the main pressure-bearing rupture disc, preventing unpredictable deformation and rupture at the weak point of the groove. This ensures that the main pressure-bearing rupture disc maintains its positive rupture pressure accuracy under back pressure conditions, ensuring the safety and reliability of overpressure protection.

[0013] 2. This invention is particularly suitable for harsh working conditions with significant high back pressure in pressure vessels or pipelines. It has strong adaptability to high back pressure, completely solving the deformation problem of flat-plate rupture discs under high back pressure, and expanding its application range.

[0014] 3. This utility model adopts a single-piece integrated dual-system design, eliminating the need for multiple rupture discs connected in series. It features a compact structure, small size, and easy installation. Compared to complex inverted arch rupture disc designs or series configurations, this utility model has lower processing and material costs, resulting in greater economic efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic axial cross-sectional view of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure of the main pressure-bearing rupture disc; Figure 3 yes Figure 2Top view; Figure 4 yes Figure 1 Schematic diagram of the back pressure protection support component; Figure 5 yes Figure 4 Cross-sectional view along the AA direction.

[0016] In the figure: 1. Back pressure protection support, 101. Pressure guiding through hole, 102. Annular sealing groove, 2. Sealing ring, 3. Main pressure bearing burst disc, 301. Weakening groove, 4. Pressure side connecting flange, 5. Screw assembly, 6. Back pressure side connecting flange. Detailed Implementation

[0017] The present invention will be described in detail with reference to the accompanying drawings.

[0018] like Figures 1-5 As shown, the dual-system high back pressure functional rupture disc includes a clamping mechanism and a dual-function system.

[0019] The dual-function system comprises a main pressure-bearing rupture disc 3 and a back pressure protection support 1. The main pressure-bearing rupture disc 3 is a flat plate rupture disc with a pressure-reducing groove, and the back pressure protection support 1 is a flat plate support with multiple pressure-guiding through holes 101. The pressure-reducing groove 301 of the flat plate rupture disc is located on its back pressure side surface, and the other side surface of the flat plate rupture disc is in close contact with the flat plate support. In this embodiment, the pressure-reducing groove 301 is a cross-shaped groove, and the center of the cross-shaped groove is located on the centerline of the flat plate support. The outer diameter of the flat plate support is equal to that of the flat plate rupture disc. The main pressure-bearing rupture disc 3 is made of 316 stainless steel. The back pressure protection support 1 is made of aluminum alloy.

[0020] The flat rupture disc and the flat plate support are arranged concentrically, and the pressure guiding holes 101 are evenly arranged in a matrix around the center line of the flat plate support. The weakening groove 301 of the flat rupture disc is arranged without overlapping with the pressure guiding holes 101. In this embodiment, the center line of the pressure guiding holes 101 is parallel to the center line of the flat plate support.

[0021] The clamping mechanism includes a pressure-side connecting flange 4, a back-pressure-side connecting flange 6, and a screw assembly 5 connecting the edges of the pressure-side connecting flange 4 and the back-pressure-side connecting flange 6. An annular clamping space corresponding to the dual-function system is formed between the opposing surfaces of the pressure-side connecting flange 4 and the back-pressure-side connecting flange 6. An annular sealing groove 102 is provided on the outer circumferential surface of the flat plate support, and a sealing ring 2 is provided in the annular sealing groove 102 to tightly contact the sidewall of the annular clamping space. In this embodiment, the diameter of the through hole in the back-pressure-side connecting flange 6 is larger than the diameter of the through hole in the pressure-side connecting flange 4.

[0022] Working principle: When in use, the assembled dual-function system is installed between the pressure-side connecting flange 4 and the back-pressure-side connecting flange 6 of the equipment to be protected.

[0023] When the equipment is operating normally, the system pressure P1 acts on the main pressure-bearing rupture disc 3. If the downstream pressure P2 (back pressure) increases at this time, the back pressure protection support 1 provides support for the main pressure-bearing rupture disc 3. This support structure greatly enhances the deformation resistance of the main pressure-bearing rupture disc 3. At this time, even if the back pressure P2 continues to rise or even exceeds the set burst pressure of the main pressure-bearing rupture disc 3, the main pressure-bearing rupture disc 3 will not deform or be damaged because of the support, and will continue to bear pressure normally.

[0024] When the system pressure P1 continues to rise and reaches the set burst pressure of the main pressure-bearing rupture disc 3, the main pressure-bearing rupture disc 3 precisely cracks along the preset weakening groove 301, and the pressure is released through the pressure guiding hole 101 on the back pressure protection support 1.

[0025] 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 dual-system high back pressure functional rupture disc, comprising a clamping mechanism and a dual-function system, characterized in that: The dual-function system consists of a main pressure-bearing rupture disc and a back pressure protection support. The main pressure-bearing rupture disc is a flat plate rupture disc with a weakening groove, and the back pressure protection support is a flat plate support with multiple pressure guiding holes. The weakening groove of the flat plate rupture disc is located on its back pressure side surface, and the other side surface of the flat plate rupture disc is in close contact with the flat plate support. The flat plate rupture disc and the flat plate support are arranged concentrically, and the pressure guiding holes are evenly arranged in a matrix around the center line of the flat plate support. The weakening groove of the flat plate rupture disc and the pressure guiding holes are arranged without overlapping.

2. The dual-system high back pressure functional rupture disc according to claim 1, characterized in that: The centerline of the pressure-guiding through hole is parallel to the centerline of the flat plate support.

3. The dual-system high back pressure functional rupture disc according to claim 1, characterized in that: The weakening groove is a cross-shaped groove, and the center of the cross-shaped groove is located on the center line of the flat plate support.

4. The dual-system high back pressure functional rupture disc according to claim 1, characterized in that: The clamping mechanism includes a pressure-side connecting flange, a back-pressure-side connecting flange, and a screw assembly connecting the edges of the pressure-side connecting flange and the back-pressure-side connecting flange. The opposing surfaces of the pressure-side connecting flange and the back-pressure-side connecting flange form an annular clamping space corresponding to the dual-function system. The outer circumferential surface of the flat plate support is provided with an annular sealing groove, and a sealing ring that is in close contact with the side wall of the annular clamping space is provided in the annular sealing groove.

5. The dual-system high back pressure functional rupture disc according to claim 4, characterized in that: The diameter of the through hole in the back pressure side connecting flange is larger than that in the pressure side connecting flange.

6. The dual-system high back pressure functional rupture disc according to claim 1, characterized in that: The outer diameter of the flat plate support is equal to that of the flat plate rupture disc.

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