Pre-tightening type conical surface sealing rupture disk device

Abstract

The utility model discloses a pre-tightening type conical surface sealing rupture disk device which comprises an upper clamp holder, a fastening assembly, a lower clamp holder, a rupture disk assembly and a negative pressure prevention assembly, a clamping boss is fixedly arranged on the upper clamp holder, the upper clamp holder is detachably connected to the lower clamp holder through the fastening assembly, and the lower clamp holder is detachably connected to the rupture disk assembly through the negative pressure prevention assembly. A clamping groove allowing the clamping boss to be clamped in is formed in the lower clamping device, the rupture disk assembly is pressed in the clamping groove through the clamping boss, and a negative pressure preventing assembly is arranged at the bottom of the lower clamping device; according to the utility model, the first rupture disk and the second rupture disk are conveniently positioned and mounted through the second conical rings at the edges of the first gasket, the first rupture disk, the second gasket, the fixing ring, the third gasket, the second rupture disk and the fourth gasket; according to the rupture disk device, the installation sealing performance of the first rupture disk and the second rupture disk can be effectively improved, internal medium leakage in the use process of the rupture disk device is effectively avoided, and therefore the inverted-arch-shaped rupture disk can work better.

Description

Technical Field

[0001] The utility model relates to the technical field of bursting discs, in particular to a pre-tightened cone-surface sealed bursting disc device. Background Art

[0002] Bursting disc devices are currently widely used in equipment that needs to be protected in the chemical, pharmaceutical, environmental protection, steel, electric power and other industries. The bursting disc device is an emergency overpressure relief device that is driven by a pressure difference and does not close automatically. It is mainly used to protect pressure vessels, pipelines or other closed systems from being destroyed by excessive overpressure or vacuum. The structure of the existing bursting disc device is that the bursting disc is only combined with a pressure ring, and the flange of the bursting disc wraps around the pressure ring, and is then used in conjunction with a sealing gasket. However, during actual installation, due to the inconsistent calibers of the sealing gaskets and the non-uniform tolerance range of the mounting holes, it is easy to cause the sealing gasket and the bursting disc to be installed eccentrically, thereby affecting the bursting pressure or causing the bursting disc to be damaged, leak, explode prematurely, etc. In view of the above defects, it is necessary to design a pre-tightened conical sealing bursting disc device. Utility Model Content

[0003] The utility model aims to provide a pre-tightened cone-surface sealing bursting disc device to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-tightened conical surface sealing bursting disc device, comprising an upper clamp, a fastening assembly, a lower clamp, a bursting disc assembly and an anti-negative pressure assembly, the upper clamp is fixedly provided with a snap-fitting boss, the upper clamp is detachably connected to the lower clamp through the fastening assembly, the lower clamp is provided with a snap-fitting groove for the snap-fitting boss to be snapped into, the bursting disc assembly is pressed into the snap-fitting groove through the snap-fitting boss, the bottom of the lower clamp is provided with an anti-negative pressure assembly, the anti-negative pressure assembly is used to prevent the bursting disc from being broken by the impact of negative pressure, and a partition is provided on the inner wall of the lower clamp, and a plurality of holes are provided on the partition.

[0005] Preferably, the fastening assembly includes four screws, which are respectively inserted into the four corners of the upper clamp, and the upper surface of the upper clamp is provided with four step holes, and the bottom of the engaging groove is provided with a threaded hole.

[0006] Preferably, the bursting disc assembly includes a first gasket, a first bursting disc, a second gasket, a fixing ring, a third gasket, a second bursting disc and a fourth gasket, and the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the fourth gasket are arranged in the engaging groove from top to bottom in sequence, and a first conical ring protruding downward is installed on the lower surface of the engaging boss.

[0007] Preferably, the edges of the first gasket, the first bursting piece, the second gasket, the fixing ring, the third gasket, the second bursting piece and the fourth gasket are all provided with through holes, the edges of the first gasket, the first bursting piece, the second gasket, the fixing ring, the third gasket, the second bursting piece and the fourth gasket are all provided with a second conical ring protruding downward, and a V-shaped conical groove is provided at the bottom of the engaging groove.

[0008] Preferably, the first gasket, the second gasket, the fixing ring, the third gasket and the fourth gasket are annular structures, the first bursting disc and the second bursting disc are both reverse-arched bursting discs, the second bursting disc has exactly the same structure as the first bursting disc, and the upper clamp and the lower clamp are both annular structures.

[0009] Preferably, the diameter of the locking groove is equal to the diameter of the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the fourth gasket, and the diameter of the locking boss is equal to the diameter of the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the fourth gasket.

[0010] Preferably, the negative pressure prevention assembly includes a negative pressure plate, a spring, a grid plate and a retaining ring, wherein the retaining ring is installed at the bottom of the inner wall of the lower clamp, a grid plate is installed inside the retaining ring, and a plurality of grid holes are evenly distributed on the grid plate.

[0011] Preferably, the negative pressure plate is covered on the retaining ring, and the negative pressure plate is connected to the grid plate via a plurality of springs.

[0012] Compared with the prior art, the pre-tightened conical sealing bursting disc device of the utility model is provided with a fastening assembly, which is screwed through the step hole and the threaded hole by a screw rod, so that the upper clamp and the lower clamp are connected and fixed together, which is convenient for installation and disassembly; the utility model is provided with a bursting disc assembly, which is clamped between the lower clamp and the upper clamp, and the first bursting disc and the second bursting disc are conveniently positioned and installed through the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the second conical ring at the edge of the fourth gasket, and at the same time, the second conical ring and the V-shaped conical groove are set to effectively improve the sealing performance of the installation of the first bursting disc and the second bursting disc, and effectively avoid the leakage of the internal medium of the bursting disc device during use, so that the reverse arch bursting disc can work better; the utility model can greatly reduce the medium pressure of the pressure relief through the secondary explosion pressure relief of the first bursting disc and the second bursting disc, thereby improving the safety of the pressure relief; the diameter of the engaging groove of the utility model is equal to the diameter of the first gasket, the first bursting disc, and the second gasket The diameters of the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the fourth gasket are equal to each other, so that when the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the fourth gasket are installed, they can be fixed in the center at one time, and the diameter of the engaging boss is equal to the diameters of the first gasket, the first bursting disc, the second gasket, the fixing ring, the third gasket, the second bursting disc and the fourth gasket, so that the first bursting disc and the second bursting disc can be fully pressed together to avoid the first bursting disc and the second bursting disc from bursting when they are installed. The utility model is provided with a negative pressure prevention component. When the bursting disc device as a whole is subjected to negative pressure, the negative pressure plate is stuck on the block, and the medium pressure will not affect the bursting disc device. When the bursting disc device as a whole is subjected to positive pressure, the negative pressure plate will leave the block, and the bursting disc device will be affected by the medium, thereby achieving the effect of pressure relief blasting. The negative pressure prevention component effectively reduces the occurrence of the phenomenon that the bursting disc is broken by the negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural schematic diagram of the pre-tightened cone-sealed bursting disc device of the utility model.

[0015] In the attached figure:

[0016] 1. Upper clamp; 11. Engaging boss; 111. First conical ring; 12. Step hole; 2. Fastening assembly; 21. Screw; 3. Lower clamp; 31. Engaging groove; 311. Threaded hole; 312. V-shaped conical groove; 4. Bursting disc assembly; 41. First gasket; 411. Through hole; 412. Second conical ring; 42. First bursting disc; 43. Second gasket; 44. Fixing ring; 45. Third gasket; 46. Second bursting disc; 47. Fourth gasket; 5. Anti-negative pressure assembly; 51. Negative pressure plate; 52. Spring; 53. Grid plate; 531. Grid hole; 54. Retaining ring; 6. Partition plate; 61. Hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 As shown, the utility model provides a technical solution: a pre-tightened conical surface sealing bursting disc device, comprising an upper clamp 1, a fastening assembly 2, a lower clamp 3, a bursting disc assembly 4 and an anti-negative pressure assembly 5, the upper clamp 1 is fixedly provided with a clamping boss 11, the upper clamp 1 is detachably connected to the lower clamp 3 through the fastening assembly 2, the lower clamp 3 is provided with a clamping groove 31 for the clamping boss 11 to be clamped, the bursting disc assembly 4 is pressed into the clamping groove 31 through the clamping boss 11, the bottom of the lower clamp 3 is provided with an anti-negative pressure assembly 5, the anti-negative pressure assembly 5 is used to prevent the bursting disc from being broken by the negative pressure impact, and a partition 6 is provided on the inner wall of the lower clamp 3, and a plurality of holes 61 are provided on the partition 6.

[0019] The fastening assembly 2 in this embodiment includes a screw rod 21, and four screw rods 21 are provided. The four screw rods 21 are respectively inserted into the four corners of the upper clamp 1. The upper surface of the upper clamp 1 is provided with four step holes 12, and the bottom of the engaging groove 31 is provided with a threaded hole 311. The screw rod 21 passes through the step hole 12 and is screwed to the threaded hole 311, so that the upper clamp 1 and the lower clamp 3 are connected and fixed together, which is convenient for installation and disassembly.

[0020] The bursting disc assembly 4 in this embodiment includes a first gasket 41, a first bursting disc 42, a second gasket 43, a fixing ring 44, a third gasket 45, a second bursting disc 46 and a fourth gasket 47. The first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47 are sequentially arranged in the engaging groove 31 from top to bottom. A first conical ring protruding downward is installed on the lower surface of the engaging boss 11. 111, the edges of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47 are all provided with a through hole 411, the edges of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47 are all provided with a second conical ring 412 protruding downward, and the bottom of the engaging groove 31 is provided with a V-shaped conical groove 312. The first bursting disc 42 and the second bursting disc 46 are clamped between the lower clamp 3 and the upper clamp 1. The second conical ring 412 at the edge of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47 facilitates the positioning and installation of the first bursting disc 42 and the second bursting disc 46. At the same time, the arrangement of the second conical ring 412 and the V-shaped conical groove 312 can effectively improve the sealing of the installation of the first bursting disc 42 and the second bursting disc 46, and effectively avoid the leakage of the internal medium of the bursting disc device during use, so that the reverse arch bursting disc can work better.

[0021] In this embodiment, the first gasket 41, the second gasket 43, the fixing ring 44, the third gasket 45 and the fourth gasket 47 are annular structures, the diameter of the engaging groove 31 is equal to the diameter of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47, the diameter of the engaging boss 11 is equal to the diameter of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47, the first bursting disc 42 and the second bursting disc 46 are both reverse-arched bursting discs, the second bursting disc 46 has the same structure as the first bursting disc 42, and the upper clamp 1 and the lower clamp 3 are both annular structures. The secondary explosion pressure relief of the first bursting disc 42 and the second bursting disc 46 can greatly reduce the pressure of the pressure relief medium and improve the safety of the pressure relief.

[0022] The diameter of the engaging groove 31 in this embodiment is equal to the diameters of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47, so that the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47 can be installed in a one-time centered fixed position, and the diameter of the engaging boss 11 is equal to the diameters of the first gasket 41, the first bursting disc 42, the second gasket 43, the fixing ring 44, the third gasket 45, the second bursting disc 46 and the fourth gasket 47, so that the first bursting disc 42 and the second bursting disc 46 can be fully pressed together to avoid the first bursting disc 42 and the second bursting disc 46 from being offset during installation. At the same time, the engaging boss 11 and the engaging groove 31 are fully engaged to achieve pre-tightening of the upper clamp 1 and the lower clamp 3.

[0023] The negative pressure prevention assembly 5 in this embodiment includes a negative pressure plate 51, a spring 52, a grid plate 53 and a retaining ring 54. The retaining ring 54 is installed at the bottom of the inner wall of the lower holder 3. A grid plate 53 is installed inside the retaining ring 54. A plurality of grid holes 531 are evenly distributed on the grid plate 53. The negative pressure plate 51 covers the retaining ring 54. The negative pressure plate 51 and the grid plate 53 are connected through a plurality of springs 52. When the bursting disc device as a whole is subjected to negative pressure, the negative pressure plate 51 is stuck on the stopper 54, and the medium pressure will not affect the bursting disc device. When the bursting disc device as a whole is subjected to positive pressure, the negative pressure plate 51 will leave the stopper 54, and the bursting disc device will be affected by the medium, thereby achieving the effect of pressure relief explosion. The negative pressure prevention assembly 5 effectively reduces the phenomenon of the bursting disc being broken by negative pressure.

[0024] The working principle of the utility model is as follows: during installation, the upper clamp 1 and the lower clamp 3 can be pre-tightened by engaging the engaging boss 11 and the engaging groove 31, and then the screw 21 passes through the step hole 12 and is screwed to the threaded hole 311, so that the upper clamp 1 and the lower clamp 3 are connected and fixed together, which is convenient for installation and disassembly.

[0025] During use, when the bursting disc device as a whole is subjected to positive pressure, the medium acts on the negative pressure plate 51 through the grid hole 531, pushing the negative pressure plate 51 to move, and then acts on the second bursting disc 46 and the first bursting disc 42 in turn through the hole 61 on the partition plate 6. After the pressure reaches the designed bursting pressure of the second bursting disc 46, the second bursting disc 46 explodes. After passing through the second bursting disc 46, the medium acts on the first bursting disc 42. The first bursting disc 42 is pressed and exploded, the discharge channel is opened, and the medium is discharged. The secondary explosion pressure relief of the first bursting disc 42 and the second bursting disc 46 can greatly reduce the medium pressure of the pressure relief, thereby improving the safety of the pressure relief. When the bursting disc device as a whole is subjected to negative pressure, the negative pressure plate 51 is stuck on the block 54, and the medium pressure will not affect the bursting disc device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Pre-tightened cone-sealed bursting disc device, characterized by: The invention comprises an upper clamp (1), a fastening assembly (2), a lower clamp (3), a bursting disc assembly (4) and a negative pressure prevention assembly (5); a snap-fitting boss (11) is fixedly provided on the upper clamp (1); the upper clamp (1) is detachably connected to the lower clamp (3) via the fastening assembly (2); a snap-fitting groove (31) for the snap-fitting boss (11) to be snapped into is provided on the lower clamp (3); the bursting disc assembly (4) is pressed into the snap-fitting groove (31) via the snap-fitting boss (11); the negative pressure prevention assembly (5) is provided at the bottom of the lower clamp (3); a partition (6) is provided on the inner wall of the lower clamp (3); and a plurality of holes (61) are provided on the partition (6).

2. The pre-tightened conical sealing bursting disc device according to claim 1, characterized in that: The fastening assembly (2) comprises a screw rod (21), four screw rods (21) are provided, and the four screw rods (21) are respectively inserted into the four corners of the upper clamp (1), the upper surface of the upper clamp (1) is provided with four step holes (12), and the bottom of the engaging groove (31) is provided with a threaded hole (311).

3. The pre-tightened cone-sealed bursting disc device according to claim 1, characterized in that: The bursting disc assembly (4) comprises a first gasket (41), a first bursting disc (42), a second gasket (43), a fixing ring (44), a third gasket (45), a second bursting disc (46) and a fourth gasket (47); the first gasket (41), the first bursting disc (42), the second gasket (43), the fixing ring (44), the third gasket (45), the second bursting disc (46) and the fourth gasket (47) are sequentially arranged in the engaging groove (31) from top to bottom, and a first conical ring (111) protruding downward is installed on the lower surface of the engaging boss (11).

4. The pre-tightened cone-sealed bursting disc device according to claim 3, characterized in that: The edges of the first gasket (41), the first bursting disc (42), the second gasket (43), the fixing ring (44), the third gasket (45), the second bursting disc (46) and the fourth gasket (47) are all provided with through holes (411); the edges of the first gasket (41), the first bursting disc (42), the second gasket (43), the fixing ring (44), the third gasket (45), the second bursting disc (46) and the fourth gasket (47) are all provided with second conical rings (412) protruding downwards; and the bottom of the engaging groove (31) is provided with a V-shaped conical groove (312).

5. The pre-tightened cone-sealed bursting disc device according to claim 4, characterized in that: The first gasket (41), the second gasket (43), the fixing ring (44), the third gasket (45) and the fourth gasket (47) are annular structures, the first bursting piece (42) and the second bursting piece (46) are both reverse-arched bursting pieces, and the second bursting piece (46) has the same structure as the first bursting piece (42).

6. The pre-tightened cone-sealed bursting disc device according to claim 3, characterized in that: The diameter of the engaging groove (31) is equal to the diameters of the first gasket (41), the first bursting disc (42), the second gasket (43), the fixing ring (44), the third gasket (45), the second bursting disc (46) and the fourth gasket (47), and the diameter of the engaging boss (11) is equal to the diameters of the first gasket (41), the first bursting disc (42), the second gasket (43), the fixing ring (44), the third gasket (45), the second bursting disc (46) and the fourth gasket (47).

7. The pre-tightened cone-sealed bursting disc device according to claim 1, characterized in that: The negative pressure prevention assembly (5) comprises a negative pressure plate (51), a spring (52), a grid plate (53) and a retaining ring (54); the retaining ring (54) is installed at the bottom of the inner wall of the lower clamp (3); the grid plate (53) is installed on the inner side of the retaining ring (54); and a plurality of grid holes (531) are evenly distributed on the grid plate (53).

8. The pre-tightened cone-sealed bursting disc device according to claim 7, characterized in that: The negative pressure plate (51) covers the top of the baffle ring (54), and the negative pressure plate (51) and the grid plate (53) are connected via a plurality of springs (52).

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