CN201618558U

CN201618558U - Large-opening reinforcing structure of thin-wall pressure container

Info

Publication number: CN201618558U
Application number: CN2010201230366U
Authority: CN
Inventors: 苏文献; 季鹏; 韩超; 刘晓东
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2010-03-04
Filing date: 2010-03-04
Publication date: 2010-11-03
Anticipated expiration: 2020-03-04

Abstract

The utility model relates to a large-opening reinforcing structure of a thin-wall pressure container, comprising a cylinder and a connecting pipe, wherein the connecting position of the cylinder and the connecting pipe is fillet-welded with a reinforcing ring; and rib plates are angle-welded between the reinforcing ring and the connecting pipe. The number of the welded rib plates is 2-8, and the rib plates are axially and uniformly distributed. The large-opening reinforcing structure can obviously reduce the stress of the largest local film of an opening area structure, improve the stability of the structure, reduce the processing difficulty and processing cost and enhance the market competitiveness of pressure container manufacturing enterprises.

Description

Thin-walled pressure vessel large opening reinforced structure

Technical field

The utility model relates to a kind of thin-walled pressure vessel, is specifically related to a kind of thin-walled pressure vessel large opening structure.

Background technology

Thin-walled pressure vessel refers generally to external pressure (P＜0.1MPa) and low pressure vessel (0.1＜P＜1.6MPa) of overall diameter and interior diameter ratio (Do/Di) max≤1.1-1.2.Be mainly used in storage tank, container and the tower in fields such as chemical industry, oil, Aero-Space, also through being usually used in the storage tank in food pharmaceutical field, its purposes is very extensive.But in use the suffered stress of thin-walled pressure vessel is bigger, and rigidity is relatively poor, and the integrality and the continuity of structure are had relatively high expectations.When perforate on thin-walled pressure vessel, the aperture area factor of stress concentration is bigger, need carry out rational reinforcement, could guarantee its use of normal safety aborning.When percent opening hour can be according to the 8th part of GB-150---the equal-area method that proposes " perforate and reinforcement for openings " in carries out reinforcement design to open-celled structure.But along with industrial expansion, the structure of pressure vessel becomes increasingly complex, because the needs of technology and cost often will be opened bigger hole on container, has exceeded GB-150 to reinforcement for openings designing requirement scope.When out of specifications large opening occurring on the thin-walled pressure vessel, the factor of stress concentration of aperture area is bigger, and stress distribution is more complicated, does not also have unified method that the reinforcement design is carried out in the thin-walled pressure vessel large opening at present.Along with the develop rapidly of numerical computation method and computer software and hardware, adopt the method for FEM calculation that this type of nonstandard container is designed at present usually.The structure of reinforcement for openings mainly contains panel reinforcement, thick-walled takeover reinforcement and reinforcement by integrated forging piece at present.The thin-walled pressure vessel of large opening requires the reinforcement area more concentrated; when adopting thickness with panel reinforcement that housing equates; the area of stiffening ring is bigger; structural rigidity strengthens near causing stiffening ring; increased the structure discontinuity of joining, and other parts on housing itself and the housing can limit excessive stiffening ring usually with contiguous place.In order to satisfy the reinforcement area, thicken stiffening ring and can cause stiffening ring and thickness of shell difference, the discontinuity of structure is strengthened, easier formation stress is concentrated and differential thermal expansion, not only can not play the effect of reinforcement, the stress that the district is passed through in perforate is mutually worsened; The relative cylindrical shell of the wall thickness of thick-walled takeover reinforcement is bigger, increases welding difficulty and manufacturing cost easily, and does the time spent as adapter power and moment on nozzle, and it is excessive to take over wall thickness, can cause the stress of aperture area to increase; Large opening requires the reinforcement by integrated forging piece physical dimension big, the cost height, and manufacture difficulty is big, and is also higher with the butt weld requirement of housing.Therefore, the utility model will propose a kind of new structure at thin-walled pressure vessel large opening reinforcement, can reduce difficulty of processing and processing cost under the prerequisite that satisfies the strength and stiffness requirement.

Summary of the invention

The utility model is that a kind of thin-walled pressure vessel large opening reinforced structure simple in structure, with low cost will be provided.

Technical solutions of the utility model are: a kind of thin-walled pressure vessel large opening reinforced structure, comprise cylindrical shell, and take over, it is characterized in that: cylindrical shell is welded with stiffening ring with taking over the junction subsides, and fillet welding has gusset between stiffening ring and the adapter.

The gusset of welding is a 2-8 piece gusset, and evenly distributes vertically.

The beneficial effects of the utility model are: can reduce material consumption under the prerequisite that satisfies the strength and stiffness requirement, save production cost.Under interior pressure effect, when adopting the gusset of novel reinforced structure to add the stiffening ring structure reinforcement is carried out in the thin-walled pressure vessel large opening, when the number of welding gusset is 4 integral multiple structure stressed better; In the time can selecting gusset reinforcement orientation (as 2 gussets or 6 gussets), gusset welds vertically than effective along circumferential weld reinforcement.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the vertical view of the utility model structure;

Fig. 3 is the right view of Fig. 1.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As shown in Figure 1 to Figure 3, stiffening ring 1 pastes and is welded on the cylindrical shell 3, and gusset 2 evenly distributes, and fillet welding is between adapter 4 and stiffening ring 1.During design large opening thin-walled pressure vessel,, can adopt the utility model design reinforcement for openings owing to exceeded GB-150 to reinforcement for openings designing requirement scope.Whole in the present embodiment reinforced structure by stiffening ring and be distributed in stiffening ring and take between four block welding gussets form.

The gusset number is many more, and the total stress of structure is with once to add secondary stress more little, and the region of stress concentration area is also more little, but corresponding processing cost also increases thereupon, answers the comprehensive strength requirement and is processed into the suitable number of original definite novel reinforced structure gusset.Housing is done the time spent bearing uniform external pressure, and stability of structure improves greatly after the reinforcement, satisfies rigidity requirement, but the variation of gusset number and gusset direction of welding is to only under external pressure the influence of stability of large opening thin-walled pressure vessel is not obvious.

Using method of the present utility model is: when the design thin-walled pressure vessel, for percent opening greater than 0.5 large opening pressure vessel, exceeded GB-150 to reinforcement for openings designing requirement scope, at this moment can adopt the utility model, novel large opening reinforced structure design.

Claims

1. a thin-walled pressure vessel large opening reinforced structure comprises cylindrical shell (3), takes over (4), it is characterized in that: described cylindrical shell (3) is welded with stiffening ring (1) with taking over the subsides of (4) junction, and fillet welding has gusset (2) between stiffening ring (1) and the adapter (4).

2. thin-walled pressure vessel large opening reinforced structure according to claim 1, its spy is: the gusset of described welding (2) is a 2-8 piece gusset, and evenly distributes vertically.