CN2254134Y - Double-layer middle- and low-pressure container - Google Patents

Abstract

The utility model relates to a total double-layer pressure container with middle and low pressures, which comprises a barrel body, a closure head and pipe sections. The utility model is characterized in that a total double-layer structure scheme is used. The barrel body with two layers is composed of an inner barrel and an outer barrel, wherein, the inner barrel is wrapped by the outer barrel; the closure head or a flange, and the pipe sections all adopt the double-layer structure corresponding to the barrel body. Both the inner layer or the outer layer can be made of carbon steel and alloy steel, or the inner layer is made of stainless steel and the outer layer is made of the carbon steel or the alloy steel. The welding seams of both the inner and the outer layers are mutually staggered vertically and toroidally. The whole thickness of the barrel wall is from 6 to 40 mm, the inner layer and the outer layer respectively take up almost a half of the whole thickness, and a safety monitoring interface arranged on the container is communicated with a safety monitoring and protecting device.

Description

In all double-layer type, low-pressure pressure container

The utility model belongs to the storage facilities of gas or liquid, in relating to, low-pressure pressure container.Be widely used in various mesolow pressure vessel and equipments such as cylindrical shape autoclave, sulfuration cylinder, liquefied petroleum gas container, rock gas basin, anhydrous ammonia tank, reactor and Hyperbaric oxygen chamber, the general at present single layer structure form that adopts.These equipment comprise relatively large industrial boiler drum and shell-and-tube heat exchanger housing etc., and its wall thickness mostly is about 6～40mm, and interior pressure mostly is between 0.3～3MPa.Because in, low-pressure pressure container equipment is thinner because of wall, all be directly to roll up weldering with corresponding steel plate to make now both at home and abroad, manufacturing seems simplely (sees also standard GB 150 " Steel Pressure Vessels ", whole nation pressure container standard technical committee) but long-term practice both domestic and external also show, this class single layer structure pressure vessel and equipment exists following congenital adverse consequences (to ask for an interview: Gong Bin " control that pressurized container breaks ", Zhejiang science and technology publishing house, 1985):

1. in a single day crack propagation takes place in container individual layer and penetrability welding line structure housing, may cause serious explosion failure accidents, and this class accident is of common occurrence.

2. inflammable, the explosive or poisonous medium of internal tank leaks in case the crack spray takes place, and will cause pernicious consequences such as serious burning, blast and poisoning, and this class consequence is also seen repeatly and is aquatic foods.

3. jar check that this will bring appreciable economic loss for guaranteeing that vessel safety uses, must regularly stop production to open, the defective of safe operation is more necessary makes security evaluation, repairs or declares the processing of giving up in case discovery jeopardizes.

4. container safety on line state is difficult to realize self-protection and action alarm monitoring.

The purpose of this utility model is the shortcoming that will overcome prior art, provide a kind of in, low-pressure pressure container, keeping under original material, wall thickness and the strength character condition, make it can pressure-bearing have the self-protection function again.

Adopt technological scheme as follows for achieving the above object:

This pressurized container is the same with prior art also to be had cylindrical shell, end socket or flange and takes over members such as pipeline section, is characterized in that cylindrical shell is by inner core with urceolus is two-layer constitutes; End socket or flange and all the same double layer construction form that adopts of adapter pipeline section with cylindrical shell.Suitable position is equipped with the security monitoring interface on skin, is communicated with safety monitoring and protecting system used.

Adopt this organization plan to have significant advantage:

1. even crack propagation takes place container shell, under operation inside casing spare, because outer field protective action, the damage inactivation form of container can only be " leak and not quick-fried ".

2. because the outer medium that can the collecting container internal leakage comes out and make release, warning and emission treatment as required, thus can avoid at all medium leak outside the various consequences that may cause.

3. container safety on line state can be by the new type of safe supervisory device " patented technology realizes simple and reliable automatic monitoring (many turret vessels equipment can be realized computer interlock security monitoring management).

4. prolong the tankage stopping production and open cycle and the significantly minimizing stopping production and the economic loss of checking that jar is checked.

Though the full bilayerization of structure of container, can increase its manufacture cost to a certain extent (produces in batches and improves under the condition of technological equipment at tissue, only change into the bilayerization structure, the increase of its manufacture cost will be few), but the direct and indirect economic effect that is brought for the container using process therefrom may be considerably beyond the cost of tankage itself.After the tankage of single layer structure stainless steel changed into full bilayerization structure, its stainless steel consumption can significantly reduce.Obviously, complete bilayerization construction of pressure vessel will to have a large capacity and a wide range future various above-mentioned in, the safety guarantee technology of low-pressure pressure container equipment brings great change, and also will bring direct significantly and indirect economic effect.

Further specify the embodiment of technological scheme with reference to the accompanying drawings:

Accompanying drawing is a structural representation of the present utility model

1 is container internal layer or title inner core among the figure, its wall thickness is about 1/2 of corresponding existing single layer structure pressurized container, by certain carbon steel, alloyed steel or the corrosion resistant plate that satisfy the design of pressure vessels usage requirement, by in common, the weldering of the manufacturing process technology requirement of low-pressure pressure container volume makes, and positions such as its outer wall weld seam are polished flat, paste outside one deck in order to bag; 2 is the outer or title urceolus of container among the figure, its wall thickness also is about 1/2 of existing corresponding former single layer structure pressurized container, by certain carbon steel that satisfies the design of pressure vessels usage requirement, alloy sheets is (to former stainless steel individual layer pressurized container, its outer general available normal low carbon steel plate that satisfies requirement of strength design replaces after making full bilayerization structure into), after piecemeal (being generally 2～3) twists and is shaped, use existing clip and tighten technology, the weld seam bag that suitably staggers is attached to the internal layer outside, and take mouthful butt joint vertically and circumferential welded seam full weld through welding in addition, but till not welding with internal layer or inner tank theca with formed; 3 are the double-deck combination in two ends convex head (or an end is double-deck portfolio exposure flange) among the figure, its total wall thickness with material also about with former single layer structure container quite or identical, must satisfy the design usage requirement of pressurized container, its skin does not adopt the stainless material of former single layer structure yet, inside and outside two-layer drawing alone or in combination, or adopt at internal layer end socket outside distinguish and to take a mouthful butt weld form master weldering and form, though its each layer is the full weld through welding all, between skin and the internal layer also all not weld degree of being; Container two ends end socket or flange can be in that to make the back respectively separately welded together with the inner core master, by pressure test leak-detecting qualified after again bag stick that outer each section is block to become plate, also can all carry out earlier inner core (comprising two ends end socket or flange) and then all bag paste outside one deck; 4 is the double-deck pipeline section of taking over of container among the figure, its opening-nozzle design code and opening-nozzle welding procedure are all basic identical with existing single layer structure container, be nested inside and outside taking over pipeline section and being double layer construction and add inner pipe end seal welding of different mainly only being, and be that the weld seam that links to each other with internal and external layer cylindrical shell or end socket also can suitably stagger as far as possible; 5 for being arranged on the bilayer structural container and realization automatic collection and treatment of dielectric leakage of adapter pipeline section and safety on line state monitoring device (Zhu Guohui etc. on the skin among the figure, Chinese invention patent, the patent No.: the 6108606.6) flange-interface of Xiang Lianing (monitor-interface), this interface aperture is not less than 50mm, dress is welded in the suitable position of skin or adapter pipeline section in advance, and make its can and each position internal and external layer of container and take between the pipeline section and communicate with each other, when extracting gases was chemically examined automatically between supervisory system is regularly to internal and external layer, whether just diagnosable container inner core or internal layer crack propagation took place and micro-seepage phenomenon take place; When interior media leaks from the crack, outer and attaching thereon can make automatic collection, discharging, pressure release and warning processing a cover safety monitoring system,

In sum, the utlity model has following characteristics:

1. design is simple with manufacturing technology, is convenient to industrialization on the prior art basis;

2. has the datonation-inhibition protective function of omnibearing oneself, even the severe crack expansion takes place under the working pressure condition also with the catastrophic whole breaking blasting accident of unlikely generation;

3. in case the generation container interior media leaks, and can play the collection and treatment effect by skin, may avoid at all inflammable, explosive and poisonous medium leak outside through the crack the various serious consequences that may cause, environment and safety protection also are of great importance.

4. can under working pressure, realize the automatic monitoring and diagnosis of pressure vessel safety state.Though be not as long as the crackle on the container wall can send diagnostic alarms once expansion is arranged, as long as but comparatively serious medium seepage phenomenon is arranged under the promotion of working pressure, supervisory device just can react to some extent, in case and internal layer crackle through crack, the medium that leaks also can be handled by outer homing guidance and be reported to the police, so this pressure vessel and equipment with full bilayerization structure of datonation-inhibition function, though the expansion to some extent that the crackle of its internal layer may be progressively, but only however influence produce normally carry out and cause serious safe consequence, be actually and need not be eager to be handled, this has monitored the character that non-serious harm crack propagation signal also do not handled easily with acoustic emission system for monitoring be identical.

Obviously, the pressure vessel and equipment technology of applying this full bilayerization structure has great technical meaning and social economic benefit.

Claims (4)

1. in all double-layer type, low-pressure pressure container, comprise cylindrical shell, end socket, adapter pipeline section, it is characterized in that cylindrical shell by inner core [1] and the two-layer formation of urceolus [2], the urceolus bag is attached to the inner core outside; End socket or flange [3] are taken over all the same with the cylindrical shell double layer construction that adopts of pipeline section [4].

2. in all double-layer type according to claim 1, low-pressure pressure container, it is characterized in that the total wall thickness of cylindrical shell is 6～40mm, inner core [1], urceolus [2] wall thickness are equal substantially; The inside and outside layer of convex head or flange [3] wall thickness is corresponding consistent with the wall thickness of inner core, urceolus respectively.

3. in all double-layer type according to claim 1 and 2, low-pressure pressure container, the internal layer, the cladding material that it is characterized in that cylindrical shell, end socket or flange and take over pipeline section adopt carbon steel, alloyed steel or internal layer to adopt outer carbon steel or the alloyed steel of adopting of stainless steel; Its inside and outside two-layer vertically and circumferential welded seam stagger mutually.

4. in all double-layer type according to claim 1 and 2, low-pressure pressure container, it is characterized in that the outer suitable position of going up is equipped with security monitoring interface [5], its aperture is not less than 50mm.

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