CN209442500U

CN209442500U - A kind of lifting lug of thin-walled pressure vessel

Info

Publication number: CN209442500U
Application number: CN201821720200.4U
Authority: CN
Inventors: 孙照明; 徐丽萍; 卢国芳; 周铭
Original assignee: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Current assignee: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date: 2018-10-23
Filing date: 2018-10-23
Publication date: 2019-09-27
Anticipated expiration: 2028-10-23

Abstract

The utility model discloses a kind of lifting lugs of thin-walled pressure vessel, including the backing plate being connected in thin-walled pressure vessel housing outer surface, the pipe axis being fixed on backing plate; the mean radius of thin-walled pressure vessel is R; the nominal thickness of thin-walled pressure vessel is δ; stiffener plate is arranged in the lifting lug of the thin-walled pressure vessel in thin-walled pressure vessel shell inner surface, and the distance at end to the backing plate edge of the stiffener plate is not more thanAccording to experience in design and finite element analysis computation, on the basis of not increasing thin-walled pressure vessel thickness of shell, meet lifting requirements in such a way that stiffener plate is set in thin-walled pressure vessel shell inner surface.

Description

A kind of lifting lug of thin-walled pressure vessel

Technical field

The utility model category lifting lug used for hoisting more particularly to a kind of lifting lug of thin-walled pressure vessel.

Background technique

Lifting lug is arranged in equipment for being promoted or a kind of primary structure member of pulling equipment.Lifting lug is in equipment hoisting Important component is directly related to the Hoisting Security of equipment.It is sufficiently large remaining that the guiding theory of lifting lug design is that bearing capacity will have Amount, should meet the intensity requirement that self-strength is connected with equipment.

Lifting lug design considerations relevant specification of country carries out Preliminary design, and it is steady to do lifting according to the position and orientation that primarily determine The relevant Mechanics Calculations such as qualitative, intensity, local stress, local reinforcement, lifting lug itself intensity, it is special to thin-walled, elongated tower etc. Equipment should also do finite element analysis, it is ensured that lifting lug design meets lifting requirements.

Meet lifting requirements to ensure that lifting lug designs, generally use following manner to increase the intensity of lifting lug:

(1) increase the thickness of shell of container；

(2) H profile steel or channel steel are added；

(3) increase the size of lifting lug.

But these modes all considerably increase the manufacturing cost of equipment, and H profile steel or channel steel are arranged in equipment, no But the difficulty of manufacture is increased, also will affect the flowing of medium in equipment.

Utility model content

The main purpose of the utility model is to provide a kind of lifting lug of thin-walled pressure vessel, according to experience in design and finite element Analytical calculation is reinforced on the basis of not increasing thin-walled pressure vessel thickness of shell by being arranged in thin-walled pressure vessel shell inner surface The mode of gusset meets lifting requirements.

Above-mentioned purpose is mainly accomplished by the following way:

A kind of lifting lug of thin-walled pressure vessel is fixed on backing plate including the backing plate being connected in thin-walled pressure vessel housing outer surface Pipe axis, the mean radius of thin-walled pressure vessel is R, and the nominal thickness of thin-walled pressure vessel is δ, it is characterised in that: in thin-walled pressure vessel shell Stiffener plate is set on inner surface, and the distance at end to the backing plate edge of the stiffener plate is not more than

Preferably, the thin-walled pressure vessel is the molecular sieve adsorber in air separation equipment.

Preferably, the lifting lug is axial lifting lug or board-like lifting lug.

Preferably, the stiffener plate is stiffening ring.

Preferably, the both ends width of the stiffening ring is at least 50mm.

Preferably, the stiffener plate is identical with the material of thin-walled pressure vessel shell, and the thickness of stiffener plate is not less than thin-walled The thickness of container casing.

Preferably, the connection type of the stiffener plate and thin-walled pressure vessel shell inner surface is welding.

Preferably, the lifting lug is horizontally disposed with one piece of stiffener plate.

Preferably, the lifting lug is horizontally disposed with two pieces of stiffener plates.

Preferably, the stiffener plate is arranged symmetrically in the two sides of lifting lug.

Preferably, the long side length of the stiffener plate is more than or equal to the width of backing plate.

The utility model is possessed compared with the existing technology to be had the beneficial effect that:

1. the utility model is not on the basis of increasing thin-walled pressure vessel thickness of shell, by easy local reinforcement, i.e., full Foot lifting requirements, do not influence the installation of ancillary equipment in container.

2. H profile steel or channel steel are arranged not in equipment for the utility model, manufacture difficulty is reduced compared with prior art.

3. the utility model can reduce the size of lifting lug to a certain extent, it is big to solve traditional standard lifting lug volume, The big problem of required installation space.

4. the utility model on the basis of not increasing the manufacturing cost of thin-walled pressure vessel, both ensure that the strong of lifting lug itself Degree, and taken into account the stress degree of container casing.

Detailed description of the invention

Fig. 1 and Fig. 2 is each component part connection schematic diagram of lifting lug in the utility model, and Fig. 1 is side view, and Fig. 2 is positive View.Fig. 3 is the schematic diagram of stiffening ring in embodiment.The embodiments of the present invention are further described hereinafter with reference to Fig. 1-3, This attached drawing is usually schematical and not to scale for clarity.

Specific embodiment

" thin-walled " refers to that the thickness of container casing is not more than 1/10th of inside diameter of vessel herein.If defining container The ratio between cylinder overall diameter Do and its interior diameter Di are K, as K=Do/Di≤1.2, referred to as thin-walled pressure vessel.Thin-walled pressure vessel is averaged Radius is R, R=(Do+Di)/4.The nominal thickness of thin-walled pressure vessel is δ, is referred to design thickness plus thickness of steel product minus deviation Afterwards upward rounding to Standard of steel specification thickness.When being promoted by lifting lug or drawing thin-walled pressure vessel, thin-walled pressure vessel may be Load effect is lower to occur excessive deformation or rupture.The theoretical basis that thin-walled pressure vessel intensity is related to is the non-moment reason of revolutional shell It is all and to have ignored the diameter perpendicular to wall surface of the container along the equally distributed membrane stress of shell wall thickness by, the stress thus calculated It is a kind of approximate calculation method to stress, but can be controlled in the error range of engineering permission.

" lifting lug " structure type is various, integrate there are several types of: tower top ring type lifting lug, board-like lifting lug, tubular shaft type are hung Ear, mixed type lifting lug.The utility model illustrates content and beneficial effect as embodiment using tube shaft type lifting lug.Tubular shaft type is hung Ear, including pipe axis and baffle, wherein baffle is fixed on the outside of pipe axis, and pipe axis is fixed on backing plate, and backing plate is connected to thin-walled pressure vessel On the outer surface of shell, the shape of backing plate is generally square or rectangle.

HGT21574-2008 is required according to chemical industry equipment lifting lug and engineering technology, it is past in the relatively thin high tower of wall thickness It is past not to be able to satisfy table 9.2-2 to the maximum hoist of axial lifting lug and shell minimum thickness and plate thickness requirement at lifting lug are set, And need to increase the thickness of shell at lifting lug.Corresponding to device diameters, the diameter of single lifting lug hoist and tube shaft type lifting lug, pass through Table 9.2-2 can find minimum wall thickness (MINI W.) needed for shell at lifting lug.And the shell length for thickening section is answered when should meet local reinforcement Power concentration theory, i.e., the stress value locally increased are decayed rapidly with the increase of the spacing with peak stress point.Peak stress point It is present in the casing center position for thickening section；And zero is decayed in its stress value locally increased of the edge for the cylinder for thickening section, Reinforcing effect is not had.So the shell range of partial thickening section includes the edge that stress decay is zero, according to meter It calculates, the edge that stress decay is zero is at a distance from backing plate edge

In order to follow the theory of stress concentration, to meet lifting lug in the case where not increasing the thickness of shell of thin-walled pressure vessel Lifting requirements, the utility model can installation backing plate thin-walled pressure vessel shell inner surface on stiffener plate is set, thus Increase the stress degree of lifting lug, the distance at end to the backing plate edge of stiffener plate is not more thanI.e. above-mentioned Reinforcement is carried out in the range of stress decay.

" stiffener plate " is by length L, width W and tri- size compositions of thickness D herein.If stiffener plate setting with The position that backing plate is overlapped, then it is assumed that stiffener plate is fallen in the range of stress decay；If stiffener plate is not be overlapped with backing plate Region, then define with backing plate sides aligned parallel and the nearest side of vertical range is the end of stiffener plate；If stiffener plate and pad Plate do not have overlapping region and it is not parallel when, then require the long side of stiffener plate to be not more than to the minimum range at the backing plate edge

Herein " stiffening ring " refer to for increase container strength and stiffness, on the inner wall of the housing or outer wall welding annular structure Part.When designing stiffening ring, most basic requirement is exactly that the practical the moment of inertia of stiffening ring is greater than least moment of inertia, can be welded on appearance The outer surface of device can also be welded on the inner surface of container.But if being mounted on the outer surface of container, leave the sky of lifting lug for Between it is extremely limited, and will affect the installation of related ancillary equipment.

The embodiment of the lifting lug of a thin-walled pressure vessel as shown in Figs. 1-3 is set forth below, the embodiment is to the utility model Content and spirit only there is exemplary role, and unlimited effect.

The side view of lifting lug in Fig. 1 the utility model, Fig. 2 are front view, and Fig. 3 is the schematic diagram of stiffening ring in embodiment. Tube shaft type lifting lug includes pipe axis 1 and baffle 2, and wherein baffle 2 is fixed on 1 outside of pipe axis, and pipe axis 1 is fixed on backing plate 3, backing plate 3 It is connected on the outer surface of thin-walled pressure vessel shell 4, backing plate 3 is square, and width is fixed.Content according to the present utility model, Ground is parallel on the inner surface of thin-walled pressure vessel shell 4 has been horizontally disposed with stiffening ring 5_aAnd 5b, two pieces of stiffening rings are in lifting lug Two sides are arranged symmetrically and are welded on shell.The position being overlapped with lifting lug is arranged in stiffening ring 5a and 5b in this embodiment, reinforces The length L for enclosing 5a and 5b is identical, and is greater than the width of backing plate 3.Stiffening ring both ends width W is 50mm, then in-between width is greater than 50mm.The stiffening ring 5a and 5b is identical as the material of thin-walled pressure vessel shell, and thickness D is equal to the thickness of thin-walled pressure vessel shell 4, Sequential welding is used with the connection type of shell inner surface.

Claims

1. a kind of lifting lug of thin-walled pressure vessel is fixed on backing plate including the backing plate being connected in thin-walled pressure vessel housing outer surface Pipe axis, the mean radius of thin-walled pressure vessel are R, and the nominal thickness of thin-walled pressure vessel is δ, it is characterised in that: in thin-walled pressure vessel shell Stiffener plate is set on surface, and the distance at end to the backing plate edge of the stiffener plate is not more than

2. the lifting lug of thin-walled pressure vessel according to claim 1, it is characterised in that: the thin-walled pressure vessel is air separation equipment In molecular sieve adsorber.

3. the lifting lug of thin-walled pressure vessel according to claim 1, it is characterised in that: the lifting lug is axial lifting lug or board-like hangs Ear.

4. the lifting lug of thin-walled pressure vessel according to claim 3, it is characterised in that: the stiffener plate is stiffening ring.

5. the lifting lug of thin-walled pressure vessel according to claim 4, it is characterised in that: the both ends width of the stiffening ring is at least 50mm。

6. the lifting lug of thin-walled pressure vessel according to claim 1, it is characterised in that: the stiffener plate and thin-walled pressure vessel shell Material it is identical, the thickness of stiffener plate is not less than the thickness of thin-walled pressure vessel shell.

7. the lifting lug of thin-walled pressure vessel according to claim 1, it is characterised in that: the stiffener plate and thin-walled pressure vessel shell The connection type of inner surface is welding.

8. the lifting lug of thin-walled pressure vessel according to claim 1, it is characterised in that: the lifting lug is horizontally disposed with one piece of reinforcing rib Plate.

9. the lifting lug of thin-walled pressure vessel according to claim 1, it is characterised in that: the lifting lug is horizontally disposed with two pieces of reinforcing ribs Plate.

10. the lifting lug of thin-walled pressure vessel according to claim 9, it is characterised in that: the stiffener plate is in the two sides of lifting lug It is arranged symmetrically.

11. according to the lifting lug of thin-walled pressure vessel described in claim 8 or 9 or 10, it is characterised in that: the long side of the stiffener plate Length is more than or equal to the width of backing plate.