Dropping type safety decompression device
A pressure relief device and safety technology, applied in the direction of safety valves, valve devices, functional valve types, etc., can solve the problems of complex manufacturing process, high cost, and poor sealing performance of bursting discs, and achieve high sealing requirements, low cost, The effect that the manufacturing method is simple
Inactive Publication Date: 2007-09-26
DALIAN UNIV OF TECH
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Problems solved by technology
Practice has shown that the sealing performance of this bursting disc is very poor, and it is difficult to meet the requirements of industrial production
National patent - a ring groove shedding type bursting disc device (patent number: ZL95230430.9) and a non-closed ring groove type bursting disc device without debris falling off (patent number: ZL96225896.2) have solved the sealing problem well, However, because it is a reverse arched rupture disc, it needs a certain amount of blasting energy, so it is difficult to apply to the situation of liquid overpressure and extremely low bursting pressure.
In addition, the above two patents are processed with weakening grooves along the clamping edge of the bursting disc, the manufacturing process is complicated and the cost is high
Method used
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[0012] Below in conjunction with accompanying drawing, the present invention will be further described.
[0013] A fall-off type safety pressure relief device related to the present invention is installed on the storage tank shell 1 . The operating pressure of the storage tank is 0.04Mpa, and the design pressure is 0.25Mpa. Accordingly, the design pressure of the present invention is 0.1Mpa, and the discharge aperture is 240mm. The inner diameter of the upper page 1 of the holder is 255mm, the inner diameter of the container flange and the lower page 2 of the holder is 240mm, the outer diameter of the shedding piece 5 is 260mm, the thickness of the shedding piece 5 is 0.8mm, and the inner diameter of the O-ring 4 is 250mm , The outer diameter of the O-ring is 262mm, and the deformation of the O-ring 4 after clamping is 3mm. After assembly, it can be properly installed on the storage tank shell 1, and then it can work normally.
[0014] When the storage tank is over-pressuri...
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A device is composed of holder upper limb, knockout sheet O shaped ring, container flange and holder down limb. The holding force between holder and knockout sheet is controlled by elastic deformation size of O shaped ring to ensure knocked out to knockout sheet at the designed explosive pressure. The internal diameter of holder upper limb is in between internal and external diameters of O shaped ring, axial distance of explosive sheet and upper limb contact surface of holder is 2-10 mm, at normal operating state holder upper limb remains contact state with holder down limb and container flange to ensure elastic deformation size of O shaped ring.
Description
technical field [0001] The invention belongs to the technical field of safety equipment, relates to a safety relief device for fluid pressure, and is particularly suitable as a safety accessory for ultra-low pressure equipment. Background technique [0002] There are many types of safety pressure relief devices for fluid pressure systems widely used in chemical, petrochemical, petroleum refining, chemical, electric power, metallurgy, transportation and other industries, but ultra-low pressure rupture discs have always been a difficult problem in manufacturing. In order to solve the problem of ultra-low pressure, an ordinary shedding type bursting disc has been used. It is embedded in the annular groove on the side of the inner cylinder of the holder, then fixed with an elastic clamp, and then coated with sealant to achieve sealing. Practice has shown that the sealing performance of this bursting disc is very poor, and it is difficult to meet the requirements of industrial pr...
Claims
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IPC IPC(8): F16K17/40F16K17/02
Inventor 李岳毕明树丁信伟王淑兰
Owner DALIAN UNIV OF TECH