CN103133733B - Reverse-arched type rupture disc capable of accurately controlling rupture pressure - Google Patents
Reverse-arched type rupture disc capable of accurately controlling rupture pressure Download PDFInfo
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- CN103133733B CN103133733B CN201210421525.3A CN201210421525A CN103133733B CN 103133733 B CN103133733 B CN 103133733B CN 201210421525 A CN201210421525 A CN 201210421525A CN 103133733 B CN103133733 B CN 103133733B
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Abstract
The invention discloses a reverse-arched type rupture disc capable of accurately controlling rupture pressure. The reverse-arched type rupture disc capable of accurately controlling rupture pressure comprises a reverse-arched spherical surface rupture membrane (1). The ratio of the height (H) of the reverse-arched spherical surface to the diameter (D) of the reverse-arched spherical surface is in a range of a quarter to one-sixth, and a triangle conical concave pit (2) is formed in the center structural point of the height rupture membrane arch surface, wherein D is the diameter of the arch surface, and H is the height of the arch surface. According to the reverse-arched type rupture disc capable of accurately controlling rupture pressure, the concave pit is formed in the center structural point at the top of the arched surface of the reverse-arched type rupture disc, and pre-stabilization of pressure is carried out. The maximum allowable deviation, relative to the standardized rupture pressure, of the practical test rupture pressure of the rupture disc, namely rupture pressure allowance deviation, can be less than or equal to 2 percent and meet the national standard that the rupture pressure allowance deviation is less than or equal to 5 percent. Even if slight injuries are generated at any position of the arched surface, the fact that rupture is carried out within the designed pressure range can be ensured. Meanwhile, sensibility of clamp force to the rupture pressure and sensibility of injuries during operation and installation are reduced.
Description
Technical field
The present invention relates to a kind of safety installations that is widely used in the devices such as oil, chemical industry, chemical fertilizer, medicine, metallurgy, air-conditioning and fluid pressure device superpressure preventing safety relief.
Background technique
Rupture disk is the important safety of pressurized container, pipeline.It can regulation temperature and pressure under explosion, relieving pressure, support equipment safety installations.In the time of breaking out of fire or other accidents, after main pressure relief device is opened, available rupture disk is as additional pressure relief device.The working medium can be used in pressurized container or pipeline has viscosity or is easy to crystallization, polymerization, easily by valve clack of safety valve with base sticks or the place of blocking safety valve; Material chemical reaction in pressurized container may make the container inner pressure moment safety valve that sharply rises can not open in time the place of pressure release; Working medium in pressurized container or pipeline is hypertoxic gas or expensive gases, may exist and leak the place that causes environmental pollution and waste with safety valve; Unimpeded place when pressurized container and pressure piping require all to release or all release, and other are not suitable for safety valve and are applicable to the place of rupture disk.
Rupture disk is divided into four classifications by the difference of failure mode and material: plate, positive arch form, counter-arch shaped and graphite mould.Graphite mould is mainly used in deep-etching and low-pressure occasion.The combination property of plate rupture disk is poor, is mainly used in low pressure and super-low voltage operating mode, especially large-sized silo.Positive arch form and counter-arch shaped application are more.For traditional domed rupture disk, it is the spherical vault of being made by the method for ductile metal hydraulic pressure or pneumatic forming.Between the arch of rupture disk and flanging, have a fillet, this fillet size is consistent with the fillet on supported flange.When rupture disk is arranged on pressurized container, its concave surface is towards protected container one side, and in the time that system overpressure reaches the regulation bursting pressure of rupture disk, rupture disk explosion under two-way action of pulling stress such as axle such as grade, is released the pressure of system.Its working principle is to utilize the tensile strength of material to carry out controlled blasting pressure, and the arch outgoing direction of rupture disk is consistent with pressure-acting direction.In use finding, all there is identical limitation in all domed rupture disks: because the center thickness of rupture disk is weakened intentionally, be easy to shift to an earlier date explosion because of fatigue; Operation pressure can not exceed 65% of rupture disk minimum burst pressure.Cause thus the appearance of counter-arch shaped blasting piece.Its installation direction of this rupture disk is contrary with domed rupture disk, and vault convex surface is towards protected container, i.e. convex surface pressurized.In the time that pressure reaches regulation bursting pressure, the vault warpage unstability of convex surface upset are in the past.Its working principle is to utilize the compressive strength of material to control its bursting pressure, and explosion mechanism is unstable failure.Than traditional domed rupture disk, a pressurized, not tension when its work, before unstability upset, almost there is no permanent deformation, can bear alternative cycle pressure, therefore have that anti-fatigue performance is good, operation pressure is high, pressure can reach more than 90% advantage of its minimum burst pressure.The bursting pressure of this rupture disk is also relevant with the radius of curvature of rupture disk vault simultaneously, and the radius of curvature that therefore changes a little vault just can be adjusted the bursting pressure of rupture disk.This is completely impossible to domed rupture disk.Counter-arch shaped blasting piece mainly comprises antiarch band cutter type, antiarch band grooved, antiarch antiarch jaw type etc., and can adopt knife rest, forms bleed outlet along various ways such as score line, band profile of tooth blade annular or combination shapes.
Although counter-arch shaped blasting piece has many advantages, but because its thickness is generally smaller, so its arch face very easily impaired (being for example flattened), now rupture disk can shift to an earlier date unstability (unstability upset occurs under lower than its normal bursting pressure) experiment and shows, arch face pit is very large on the buckling pressure impact of counter-arch shaped blasting piece.A for example rupture disk that diameter is 500mm, when arch face is to shrivel to form a diameter while being about the pit of 40mm by people, its buckling pressure is down to 0.012MPa by original 0.04MPa.If counter-arch shaped blasting piece arch face sustains damage, owing to shifting to an earlier date unstability, the energy of rupture disk unstability reversion is reduced, just likely can not cause brokenly immediately the serious consequence of (medium of can not releasing, does not reach relieving pressure).Low pressure explosion sheet is affected by clamping force also easily simultaneously, causes bursting pressure unstable.
Summary of the invention
The object of the invention is for prior art Shortcomings part, even if provide a kind of after its arch face arbitrary position is slight injured, all can guarantee explosion within the scope of design pressure, and accurate controlled blasting pressure, bursting pressure franchise can reach≤2% counter-arch shaped blasting piece.
Technical solution of the present invention can reach by following measures: the counter-arch shaped blasting piece of the accurate controlled blasting pressure of a kind of energy, there is an antiarch shape sphere rupture disk (1), it is characterized in that, described antiarch shape sphere H/D ratio is 1/4～1/6, antiarch shape sphere rupture disk arch face center is shaped with a triangular pyramidal pit (2), and pit tapering α is 50 ° ~ 90 °, and pit depth h is pit diameter d/4 ~ d/20, wherein, D is that arch face diameter, H are arch face height.
The present invention has following beneficial effect than prior art.
The present invention adopts the precondition of processing a pit and carry out pressure in antiarch shape rupture disk arch face (H/D ratio is 1/4～1/6) top center, the receptance of having damaged while having reduced the receptance of clamping force to bursting pressure and operation, installation.By adjusting pit diameter d, pit tapering α (by the control of mould tapering), fillet r and degree of depth h, can realize the accurate control to bursting pressure.Prove by experiment bursting pressure franchise of the present invention can reach≤2%, be less than the regulation of NBS≤5%, be obviously better than NBS.Even if adopt the present invention after its arch face arbitrary position is slight injured due to any reason, all can guarantee explosion within the scope of design pressure.And it is little to have inertia, the advantage that can react rapidly to the pressure sharply raising.
Brief description of the drawings
Fig. 1 is the accurately plan view of the counter-arch shaped blasting piece of controlled blasting pressure of the present invention.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is the explosion mechanism figure of antiarch shape rupture disk.
In figure: 1 antiarch shape rupture disk, the system point of 2 rupture disk arch faces.
Embodiment
In the embodiment of the counter-arch shaped blasting piece of the accurate controlled blasting pressure of energy of describing at Fig. 1, Fig. 2, the antiarch shape sphere H/D ratio of this antiarch shape rupture disk 1 is 1/4～1/6, and rupture disk arch face division center point is shaped with a triangular pyramidal pit 2.System point is positioned at rupture disk arch face top center.This counter-arch shaped blasting piece can be selected any in antiarch shape rupture disk type, main material: Austenitic Stainless Steel, inconel, Hastelloy, Monel, aluminium, nickel, titanium etc.When the manufacturing, first ductile metal sheet is made to a H/D than the rupture disk of the arch face shape that is about 1/4～1/6 height by the method for hydraulic pressure or pneumatic forming, then process a triangular pyramidal pit 2 with mould at convex surface top center position, the rupture disk product of producing like this, bursting pressure is accurate, even if arch face is subject to slight wound, also can guarantees explosion within the scope of design pressure, and can reduce the receptance of clamping force to bursting pressure.Load p when upset occurs rupture disk pressurized is decided by the compressive strength (elastic modulus E) of material, with close association such as radius of curvature, arch face diameter D, arch face height H, diaphragm thickness δ and the edge-restraint conditions of tinsel circular arch part, directly relevant with system point pit diameter d, pit tapering α, fillet r and degree of depth h size.Pit tapering α can be 50 ° ~ 90 °, and pit depth h can be pit diameter d/4 ~ d/20.In the situation that tinsel circular arch is certain, by adjusting system point pit diameter d, pit tapering α, fillet r and accurately controlled blasting pressure of degree of depth h, realize promptly and accurately explosion within the scope of design pressure, guarantee the safe operation of pressure system equipment.Because the upset load p of every kind of antiarch shape rupture disk and diaphragm thickness δ and edge-restraint condition have certain proportionate relationship.Generally, under diaphragm thickness δ and the certain prerequisite of arch face diameter D, by adjusting the radius of curvature of vault, adjust arch face height H value and can control bursting pressure.Under diaphragm thickness δ, arch face diameter D and the certain prerequisite of arch face height H, can control bursting pressure by adjusting vault division center point pit diameter d, pit tapering α, fillet r and degree of depth h.Experiment shows: pit diameter d, pit tapering α, fillet r and degree of depth h value are larger, and bursting pressure value is less.The pit diameter d adjustment range of system point can be arch face diameter D/5 ~ D/15.System point fillet r adjustment range can be D/2 ~ D/5.
For the adjustment of system point pit, after taking into account rupture disk upset, can there is certain potential energy to open, the medium of can releasing, general pit diameter d can adjust at D/5 ~ D/15, pit tapering α can be 50 ° ~ 90 ° scope adjustment, fillet r can adjust at D/2 ~ D/5, and pit depth h can adjust in d/4 ~ d/20 scope.
Experiment shows: the difference of antiarch shape rupture disk vault construction point groove position is also different on the impact of bursting pressure.If arch face is divided into three parts, in pit diameter d, pit tapering α, fillet r and degree of depth h mono-timing, in diaphragm dome central position, pit is set bursting pressure value is had the greatest impact.When vault center is impaired, bursting pressure reduces approximately 50%; Arch face 1/2 place is when impaired, and bursting pressure reduces approximately 40%, and damaged area more great explosion pressure decreased is larger.Above-mentioned size is taking millimeter as unit.
Consult Fig. 3.Counter-arch shaped blasting piece belongs to compression-type rupture disk, is applicable to mesolow, bears the operating mode of back pressure or pulsating load.The work of counter-arch shaped blasting piece is based on Euler's curved bar principle: they encircle to pressurized direction.In the time reaching bursting pressure, there is vertical curved relieving pressure in rupture disk.Ductile metal thin slice pressurize be in advance arch form and when mounted arch face (convex surface) towards the rupture disk of compression-side.When superpressure, because producing upset, unstability is out of shape.Rupture disk causes damaged safety installations for preventing the obturators such as pressurized container, pipe-line system, passage because of overvoltage or negative pressure.On pressurized container and pipe arrangement, setting, lower than the part (low intensity points) of pressurized container and pipe arrangement intensity in the time that interior pressure raises extremely, discharges interior pressure by destroying this low-intensity part, to protect container and pipe arrangement.Rupture disk prevent the pressurized container of the various factories such as chemical plant and nuclear power station, machine, pipe arrangement etc. because of extremely boost or chemical reaction boost etc. identical with safety valve aspect the purposes of causing danger, but have more advantage preventing that combustibility, toxicity, rare gas and radioactive fluid from leaking aspect the danger that causes, viscous fluid bonding.
Claims (3)
1. the counter-arch shaped blasting piece of the accurate controlled blasting pressure of energy, there is an antiarch shape sphere rupture disk (1), it is characterized in that, described antiarch shape sphere H/D ratio is 1/4～1/6, height rupture disk arch face division center point is shaped with a triangular pyramidal pit (2), pit tapering α is 50 ° ~ 90 °, pit depth h is pit diameter d/4 ~ d/20, wherein, D is that arch face diameter, H are arch face height, system point fillet r adjustment range is D/2 ~ D/5, and pit diameter d adjustment range is arch face diameter D/5 ~ D/15.
2. the counter-arch shaped blasting piece of the accurate controlled blasting pressure of energy as claimed in claim 1, is characterized in that, described rupture disk is any in counter-arch shaped blasting piece.
3. the counter-arch shaped blasting piece of the accurate controlled blasting pressure of energy as claimed in claim 1, is characterized in that, described system point is positioned at rupture disk arch face top center.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421525.3A CN103133733B (en) | 2012-10-29 | 2012-10-29 | Reverse-arched type rupture disc capable of accurately controlling rupture pressure |
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| CN201210421525.3A CN103133733B (en) | 2012-10-29 | 2012-10-29 | Reverse-arched type rupture disc capable of accurately controlling rupture pressure |
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| CN103133733A CN103133733A (en) | 2013-06-05 |
| CN103133733B true CN103133733B (en) | 2014-10-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257528A (en) * | 1974-02-06 | 1981-03-24 | Imi Marston Limited | Safety pressure relief apparatus |
| US4436218A (en) * | 1981-02-19 | 1984-03-13 | Imi Marston Limited | Reverse buckling bursting disc |
| US4819683A (en) * | 1988-01-29 | 1989-04-11 | Petrolite Corporation | Pressure relief device |
| CN102549324A (en) * | 2009-07-31 | 2012-07-04 | Bs&B安全系统有限公司 | Pressure relief device integrity sensor |
| CN202329526U (en) * | 2011-11-24 | 2012-07-11 | 成都凯天电子股份有限公司 | Magnetic induction alarm of rupture disc device |
-
2012
- 2012-10-29 CN CN201210421525.3A patent/CN103133733B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257528A (en) * | 1974-02-06 | 1981-03-24 | Imi Marston Limited | Safety pressure relief apparatus |
| US4436218A (en) * | 1981-02-19 | 1984-03-13 | Imi Marston Limited | Reverse buckling bursting disc |
| US4819683A (en) * | 1988-01-29 | 1989-04-11 | Petrolite Corporation | Pressure relief device |
| CN102549324A (en) * | 2009-07-31 | 2012-07-04 | Bs&B安全系统有限公司 | Pressure relief device integrity sensor |
| CN202329526U (en) * | 2011-11-24 | 2012-07-11 | 成都凯天电子股份有限公司 | Magnetic induction alarm of rupture disc device |
Non-Patent Citations (2)
| Title |
|---|
| 受损反拱形爆破片失稳压力变化有限元分析;李岳等;《石油化工设备》;20120925;第41卷(第5期);第15页图1及表1,第16页3.3.1 * |
| 李岳等.受损反拱形爆破片失稳压力变化有限元分析.《石油化工设备》.2012,第41卷(第5期),14-17. |
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