CN205978898U - Long neck flange - Google Patents
Long neck flange Download PDFInfo
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- CN205978898U CN205978898U CN201620866256.5U CN201620866256U CN205978898U CN 205978898 U CN205978898 U CN 205978898U CN 201620866256 U CN201620866256 U CN 201620866256U CN 205978898 U CN205978898 U CN 205978898U
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Abstract
The utility model discloses a long neck flange, its include flange ring, a body coupling in the awl neck of flange ring upside, with the tip groove of an awl neck top body coupling, locate the flange ring bottom surface sealed boss, vertically have a perfect understanding long neck flange's interior through -hole, the rotatory inboard edge of flange nut is outwards crossed with the intersection line of flange ring to the circular conical surface of awl neck. Through increasing awl neck main aspects radial thickness, improve the rigidity of flange to improve flange seal's reliability. Though flange finished weight wherein increases to some extent, the weight of flange blank can not increase, and the blank processing becomes off -the -shelf turning volume and reduces on the contrary, does not increase the manufacturing cost of flange, and make full use of material resource more is favorable to that petrochemical unit is stable to cover with excellent operation.
Description
Technical field
This utility model relate to petroleum refining and chemical industry, Coal Chemical Industry, chemical fertilizer industry and other various chemical industry, air-conditioning,
Air cooling, electric power facility bearing device (for example：Boiler, pressure vessel, heat exchanger, pressure pipeline, gas bomb etc.) opening connection
Sealing Technology, be particularly well-suited to high temperature and high pressure condition large opening welding neck flange.
Background technology
In the Sealing Technology that existing bearing device opening connects, flange bolt forced seal system is to be most widely used
One kind, the structure species of flange are a lot, include slip-on welding flange, W.N flange, welding neck flange, full face flange, narrow face flange,
Inverse flange and cylindrical ends, conical end, flange, heat exchanger tube sheet, blank cap, the also structure such as loose flange.
Typical flange seal auxiliary structure in prior art is as shown in figure 1, each flange is usually by ring flange 11, installs
The end groove 14 that the bolt hole 12 of bolt and nut securing member, cervical region 13 are docked with pressure-bearing shell and pad 15 form.Bolt is worn
Cross the bolt hole 12 of upper and lower two flanges, jack panel on bolt end, make the sealing surface compact pad 15 of two flanges, make flange
The medium of internal pressure p cannot the sealing surface by compress gasket 15 and its and flange between be fled to outside flange.
The practical problem of above-mentioned traditional structure generally existing is, when making the pressure p of flange interior media, temperature T raise or
During fluctuation, the comprehensive function of various load makes flange produce to open effect shown in arrow, and sealing system relaxes, and pad 15 does not have
Enough resilience continuation holdings are fitted tightly with flange sealing surface, and high-temperature high-pressure medium is fled to outside flange by sealing surface
Portion, causes explosive combustion accident.As can be seen here, the Sealing Technology that bearing device opening connects is one of key of whole equipment.
From structure behavior level analysis, the basic reason of flange interior media leakage is：After sealing system load raises, method
Orchid there occurs deflection, because structure does not have enough rigidity to keep original shape to continue to fit tightly with flange sealing surface.
For a long time, although people are devoted to the research that opening connects sealing structure always, main direction of studying exists
In the weight how reducing welding neck flange finished product on the basis of meeting intensity as far as possible, thus reducing equipment cost.This thinking
The deficiency existing is mainly manifested in：One is to be leading with Stress calculation and strength check, have ignored impact flange weight other
Factor, overemphasizes the fully stress principle making full use of the strength of materials, does not also limit the overall dimensions of flange；Two is to simplify
Ground the price hook of the size of flange finished weight and flange, and reality be flange price and flange blank weight and its plus
Two correlate of the amount of machining of work finished product.
With the enhancing of the maximization of device, environmental protection consciousness, the lifting of oil quality needs to take high pressure at higher temperature
Under technique, play in device buffering and deposit effect pressure vessel reduce, the operation of the nucleus equipment such as reactor and heat exchanger
Difficulty increases, and is often directly subject to fluid medium pressure and the fluctuation of temperature to impact, original equipment open sealing structure is difficult to
Adapt to the technique of new situations and management require it can be seen that, for measuring big and wide flange forced action type sealing structure, in conjunction with depositing
Problem improve, research and develop that a kind of sealing reliability is good, strengthen sealing function, and structure be simple, the efficiency of loading and unloading is high and becomes
This welding neck flange not increased, has extremely far-reaching and great meaning in field of engineering technology.
Content of the invention
One of the purpose of this utility model is to avoid weak point of the prior art and provides a kind of structure simply simultaneously
Rigidity and the efficient welding neck flange of sealing property can be improved.
One of the purpose of this utility model is achieved through the following technical solutions：A kind of welding neck flange, it include flange ring, one
The cone neck that body is connected on the upside of flange ring is convex with the end groove of cone neck top integrally connected, the sealing located at flange ring bottom surface
Platform, the inner via hole of longitudinally through welding neck flange, the taper seat of cone neck is rotated outwardly over flange nut with the intersecting lens of flange ring
Inside edge.
As a kind of improvement of the technical scheme of welding neck flange：The described cone big end of neck is provided with vertical straight figure.
As a kind of improvement of the technical scheme of welding neck flange：Described cone neck outside diameter is identical with flange ring diameter.
As a kind of improvement of the technical scheme of welding neck flange：Described cone neck be provided with multiple accommodate nut and with nut outside
The deep gouge of shape adaptation.
As a kind of improvement of the technical scheme of welding neck flange：Described flange be equipped with multiple perpendicular to bottom surface and be opened on
The screwed hole of bottom surface, described screwed hole is tapped blind hole or tapped through hole.
As a kind of improvement of the technical scheme of welding neck flange：Described inner via hole has monoblock type necking taper seat or local
Necking taper seat；Described necking taper seat is unidirectional or two-way.
As a kind of improvement of the technical scheme of welding neck flange：Described inner via hole internal face or/and cone neck outside wall surface are provided with
The reinforcement radially extending.
As a kind of improvement of the technical scheme of welding neck flange：Described reinforcement highly protrudes from the top of described end groove
End face.
The beneficial effects of the utility model are：A kind of welding neck flange, it includes flange ring, is integrally connected on flange ring
The end groove of the cone neck of side and cone neck top integrally connected, the seal boss located at flange ring bottom surface, longitudinally through long cervical approach
Blue inner via hole, the inside edge that the taper seat of cone neck is rotated outwardly over flange nut with the intersecting lens of flange ring, that is, bore neck
The intersecting lens of taper seat and flange ring be less than inside edge track and the method for flange nut rotation apart from the outer ring surface of flange ring
The distance of blue ring outer ring surface so that cone neck portion more sturdy so that the rigidity of flange body is improved, then improve fastening
The installation of part, namely improve the rigidity of flange on the basis of meeting intensity, thus improving the reliability of flange seal.
Brief description
Using accompanying drawing, the utility model is described in further detail, but the embodiment in accompanying drawing is not constituted to of the present utility model
Any restriction, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to following attached
Figure obtains other accompanying drawings.
Fig. 1 is the typical structure schematic diagram of welding neck flange of the prior art.
Fig. 2 is the first structural representation of a kind of welding neck flange of the present utility model.
Fig. 3 is a kind of second structural representation of welding neck flange of the present utility model.
Fig. 4 is the third structural representation of a kind of welding neck flange of the present utility model.
Fig. 5 is a kind of the 4th kind of structural representation of welding neck flange of the present utility model.
Fig. 6 and Fig. 7 is a kind of the 5th kind of structural representation of welding neck flange of the present utility model.
Fig. 8 is a kind of the 6th kind of structural representation of welding neck flange of the present utility model.
Fig. 9 is a kind of the 7th kind of structural representation of welding neck flange of the present utility model.
Figure 10 is a kind of the 8th kind of structural representation of welding neck flange of the present utility model.
Figure 11 and Figure 12 is a kind of the 9th kind of structural representation of welding neck flange of the present utility model.
Figure 13 and Figure 14 is a kind of the tenth kind of structural representation of welding neck flange of the present utility model.
Figure 15 is a kind of a kind of the tenth structural representation of welding neck flange of the present utility model.
Figure 16 is a kind of the 12nd kind of structural representation of welding neck flange of the present utility model.
Figure 17 is a kind of the 13rd kind of structural representation of welding neck flange of the present utility model.
Above-mentioned accompanying drawing includes：11 ring flanges, 12 bolts hole, 13 cervical regions, 14 end slopes
Mouthful, 15 pads, 16 sealing surface boss, 17 nut support pads, 18 inwall local height taper seats,
19 inwall whole height taper seats, 20 inwall Double-conical-surfaces, reinforcement in 21,22 cylinders, 23
External reinforcing ribs, 24 sunk type nut seats, 25 tapped blind holes, 26 blind plate lids or heat exchanger tube sheet,
27 nuts, 28 bolts, 29 gasket seals, 30 tapped through holes.
The pressure of medium, D in P bearing deviceoFlange outer diameter, DiFlange inner diameter, δ1Flange bores neck
Big end thickness, δ '1Flange bores the thickness after the big end of neck thickens, δ0Flange bores neck small end thickness, M flange external force
Square, the allowable stress under [σ] flange material design temperature, h flange cone neck height, δfThe thickness of ring flange,
δ′fRing flange thicken after thickness.
x1、x2、x3、y1、y2、y3、z1、z2、z3It is all the friendship on the big end of various neck flange and flange ring structure on welding neck flange
Point.
Specific embodiment
With reference to shown in Fig. 2～Fig. 5, in figure illustrates a kind of welding neck flange of the present utility model, and it includes flange ring, integrally
Be connected to the end groove of cone neck on the upside of flange ring and cone neck top integrally connected, the seal boss located at flange ring bottom surface,
The inner via hole of longitudinally through welding neck flange, the taper seat of cone neck and the intersecting lens of flange ring are outwardly in flange nut rotation
Lateral edges, that is, the taper seat of cone neck and the intersecting lens of flange ring are less than, apart from the outer ring surface of flange ring, the inner side that flange nut rotates
The distance of edge track and flange ring outer ring surface so that cone neck portion more sturdy so that the rigidity of flange body is improved,
Then the installation of improvement securing member, namely improve the rigidity of flange on the basis of meeting intensity, thus improving flange seal
Reliability.
A kind of this utility model welding neck flange method for designing of through hole simultaneously, at the bearing device part major diameter opening
The structure design of adpting flange, by adjusting size, improves structure, design sequence is improved simultaneously, and formation etc. is a series of
Technical cue.In the design process of flange, according to minimum load principle and the fully stress principle of flange design, by standard application
The physical dimension of finished product flange or press strength formula and calculate and check designed qualified flange size, determines the profile chi of flange
Very little；Press the less principle of axial stress again to coordinate to increase the cone radial thickness at the big end of neck and the radial thickness of flange ring, or
It is further added by boring the radial thickness at the big end of neck on the basis of determining flange outer diameter, or the width keeping flange blank rectangular cross section
Highly constant and increase cone the big end of neck radial thickness.By adjusting size, improve structure, design sequence is changed simultaneously
Enter, a series of technical cues such as formation.Design process improves the mounting means of securing member so that cone neck portion is more sturdy, makes
The rigidity obtaining flange body is improved, namely improves the rigidity of flange on the basis of meeting intensity, thus it is close to improve flange
The reliability of envelope.
Compared with the cost concept as far as possible reducing flange finished weight in conventional flange design on the basis of meeting intensity,
The high rigidity adjusting method that this utility model adopts only need to utilize the computing again of original design software, and design simplicity is although design
Flange finished weight increased, but the weight of flange blank will not increase, and blank is processed into the turning of finished product
Amount reduces on the contrary, will not increase the manufacturing cost of flange, more make full use of material resources, the high flange of sealing reliability is favourable
Cover with excellent operation in petrochemical plant is stable, social benefit is obvious.
Further, spanner revolution space is reserved in the outside in cone neck or spanner technique is exempted from use；Described exempt from spanner technique
Replace spanner including setting sinking embedded nut groove, or be correspondingly arranged axial threaded hole in ring flange former bolt penetration hole position.
Below in conjunction with specific embodiment, this utility model is described in further detail.
Embodiment 1
A kind of one of specific embodiment of welding neck flange method for designing of the present utility model, opens for bearing device part
Mouthful between connect sealing structure, shown in structural reference Fig. 2 of welding neck flange, including 11 ring flanges (being flange ring),
12 bolts hole, 13 cervical regions, 14 end grooves, 16 seal bosses.
Design procedure of the present utility model is as follows：
(1) the structural dimensions analysis of impact blank weight.With reference to Fig. 2, its end groove 14 is and the weldering of cylinder group
Required structure, seal boss 16 be with pad assembling required structure, therefore, the flange blank section scope such as in figure right side is half side
Rectangular broken line shown in, the width in blank section is about flange outer diameter DoWith flange inner diameter DiDifference half, i.e. 0.5 (Do-
Di), flange inner diameter DiIt is the required structure with the weldering of cylinder group, flange outer diameter DoMainly pass through gasket design and the arrangement of bolt
To determine, therefore, if not considering the factor such as end groove 14 and remaining machining allowance, annular blank weight is transversal basic
Area A is wide and high multiplication
A=0.5 (Do-Di)(h+δf) (1)
Annular blank kernel of section diameter
D=Di+0.5(Do-Di)=0.5 (Do+Di) (2)
Annular blank elementary physical constitution
Annular blank basis weight is equal to the product of annular blank elementary physical constitution and steel proportion.
Analysis with formula (3) before synthesis, the structural dimensions of impact blank weight are outside the flange in blank width
Footpath Do, the flange cone neck height h in the height in the blank section and thickness δ of ring flangefThree chis such as (effective thickness of flange)
Very little.
(2) flange cone neck big end thickness δ1Design.By GB 150.3-2011《Pressure vessel》Middle table 7-5 integral (type) flange
During computational chart design, do not provide the design guide that flange bores neck big end thickness, introduce here《Pressure vessels for the chemical industry and equipment》(remaining state
The long hollow piece of jade with rectangular sides, Chemical Industry Press, 1980) formula (5-46) in calculates：
Wherein, to adjust a size of main contents, in formula, δ1It is flange cone neck big end thickness, mm；M is flange moment of face,
N·mm；DiIt is flange inner diameter, mm；[σ] is the allowable stress under flange material design temperature, MPa.
(3) flange outer diameter DoDesign.Traditional designing axiom is " first thickness δ1Outer diameter D againo" design.Bore neck in flange
Big end thickness δ1Under the premise of fixed, flange outer diameter DoMainly pass through the determined by layout of gasket design and bolt, wherein comprise
The minimum load design principle of flange Moment, that is, gasket material selects and gasket construction designs needed for pad to be made
Seal pressure as little as possible, and the arrangement of bolt will make the arm of force of active force suffered by flange ring as short as possible.
(4) press traditional standard method and check stress.Design flange cone neck height h can be by GB 150.3-2011《Pressure holds
Device》Formula in middle table 7-5 integral (type) flange computational chart：
h≥1.5δ0
Equal sign can be first taken to verify through subsequent calculations again.In formula, h is flange cone neck height, mm；δ0It is that flange cone neck small end is thick
Degree, mm, it is the required structure with the weldering of cylinder group, typically take and the wall thickness such as cylinder.
The thickness δ of ring flangefThen using first it is assumed that after to verify through Stress calculation, make the axial stress of flange, radially should
Power, tangential stress and combinations thereof stress meet the requirement of allowable stress respectively, and are adjusted and make every stress close
Respective allowable stress, to realize fully stressed design.
(5) traditionally judge flange cone neck structure.Calculate (δ1-δ0)/h, if more than 13.Otherwise, increase and adjust δ1.I.e.
Just it is slightly larger than 13, also can attempt increasing and adjust δ1.
(6) coordinate flange cone neck structure one.Increase and adjust δ1For δ '1Afterwards, flange bores the big end of neck with the intersection point of ring flange by original
y1Move on to y2Point, this can hinder clamp nut and the rotation of upper spanner, therefore should adjust the thickness δ of ring flangefIncrease as δ 'f,
Make adjustment rear flange bore the big end of neck and be changed into y with the intersection point of ring flange3, keep original spanner space.Propose design side herein
The innovation of method.
Again Stress calculation check is carried out to the flange after adjustment size, make the axial stress of flange, radial stress, tangential
Stress and combinations thereof stress meet the requirement of allowable stress respectively, but are not necessarily intended to make every stress close to respective
Allowable stress, no longer imposes fully stressed design.
Additionally, by above-mentioned method for designing, can be designed that a kind of rigidity more preferably welding neck flange of the present utility model, should
Welding neck flange is further improved to its structure by embodiment 4 and subsequent embodiment.
Embodiment 2
The two of the specific embodiment of a kind of welding neck flange method for designing of the present utility model, the major technique of the present embodiment
Scheme is same as Example 1, in the present embodiment unaccounted feature, and using the explanation in embodiment 1, here is no longer gone to live in the household of one's in-laws on getting married
State.With reference to shown in Fig. 3, the present embodiment is with the difference of embodiment 1, specifically, increases the thickness δ adjusting ring flangefIncrease as δ 'f
Afterwards, flange bores the big end of neck with the intersection point of ring flange by original x1Move on to x2Point, this can hinder clamp nut and the rotation of upper spanner
Turn, therefore should adjust flange cone neck big end δ1For δ '1, make adjustment rear flange bore the big end of neck and be changed into x with the intersection point of ring flange3, keep
Original spanner space, is a kind of innovation of method for designing.
Again Stress calculation check is carried out to the flange after adjustment size, make the axial stress of flange, radial stress, tangential
Stress and combinations thereof stress meet the requirement of allowable stress respectively, but are not necessarily intended to make every stress close to respective
Allowable stress, no longer imposes fully stressed design.
Embodiment 3
The three of the specific embodiment of a kind of welding neck flange method for designing of the present utility model, the major technique of the present embodiment
Scheme is same as Example 1, in the present embodiment unaccounted feature, and using the explanation in embodiment 1, here is no longer gone to live in the household of one's in-laws on getting married
State.With reference to shown in Fig. 4, the present embodiment is with the difference of embodiment 1, and specifically, Preliminary design flange bores the big end of neck and flange
The intersection point of disk is z1, the outer ring surface drift angle of flange ring blank cross section is z2, along z1z2Bundle of lines z1Move to z3, make flange bore neck big
End is by δ1Increase as δ '1While, the axial width of ring flange is by δfIncrease as δ 'f, this is possible to keep original spanner
Space, can hinder clamp nut and the rotation of upper spanner, can pass through single ended bolt solve problem, the bolt head of single ended bolt
With do not need to rotate it is not necessary to big revolution space and spanner space after bearing-surface cooperation.This is another kind of wound of method for designing
Newly.
Again Stress calculation check is carried out to the flange after adjustment size, make the axial stress of flange, radial stress, tangential
Stress and combinations thereof stress meet the requirement of allowable stress respectively, but are not necessarily intended to make every stress close to respective
Allowable stress, no longer imposes fully stressed design.
Embodiment 4
The two of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as shown in figure 5, flange ring is an annulus carrying step, that is, cone neck is big
End is provided with vertical straight figure, and the flange cone big end of neck is connected on z with external diameter less flange ring equal in width3, the larger flange of external diameter
Ring is as the support pads of bolt.The thickness of ring flange is by δfIncrease as δ 'f, and flange cone neck big end δ1Constant, keep original pulling
Handss space.This is to improve another design innovation that structure is main contents.
Embodiment 5
The three of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, described flange bolt hole is furnished with nut support pad.Wherein：Described flange bolt
Hole is furnished with nut support pad.Support pads as shown in Figure 6 are that each bolt hole is separately configured support pads, the bowing of support pads
Fig. 7 is shown in by view, and this support pads top view profile is rectangle, its profile can also design conglobate, can also be each spiral shell
The support pads of keyhole are turned parts into the whole and are designed to be interconnected to a full circle.
Embodiment 6
The four of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as shown in figure 15；The described flange cone big end of neck and flange ring equal in width, i.e. institute
State cone neck outside diameter identical with flange ring diameter, and described bore neck be provided with multiple accommodate nut and with nut external shape fits
Deep gouge, on flange cone neck, design up concave type nut seat 24, recessed the most shallow depth is equal to the thickness of nut, recessed
Width be equal to nut width, by the use of concave part wall as fork spanner.
This structure is at utmost exaggerated the width that flange bores the big end of neck, retains more raw materials, acquired intensity
Significantly improve with rigidity.This structure is applied to the structure matching with blind plate lid or heat exchanger tube sheet 26, and its design is preferably using having
Finite element analysis method is carried out, and it manufactures, and nut seat to be ensured is parallel with flange sealing surface, and the two of shortcoming is also concave part
The nut seat processing difficulties of bottom, will adopt milling process for machining.
Meanwhile, another innovation as welding neck flange method for designing of the present utility model is exactly that traditional design idea is changed
Enter, " the first thickness δ traditional with (3) in embodiment 11Outer diameter D againo" designing axiom distinct, adopt " first outer diameter DoThick again
Degree δ1" order inverted design new concept.Arrangement mainly in combination with internal diameter and gasket design and bolt first to determine a method
Blue outer diameter Do, then check in turn again and determine flange cone neck big end thickness δ1If requirement cannot be met by traditional structure,
By the new construction of the flange cone big end of neck and flange ring equal in width come solve problem, concrete innovation is respectively in embodiment 6, reality
Apply example 7, embody in embodiment 8.
With adjustment size and compared with improving the innovative approach of structure, include in method for designing innovation herein simultaneously and set
The theory ground-breaking of meter order and structure innovation.
Embodiment 7
The five of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as shown in figure 16, described flange bores the big end of neck and flange ring equal in width, and
Design tapped blind hole 25 on flange cone neck, the depth of screw thread is not less than the thickness of nut；I.e. described flange is equipped with multiple hanging down
It is straight that described screwed hole is tapped blind hole in bottom surface and be opened on the screwed hole of bottom surface, and using single ended bolt one end spin with should
Tapped blind hole.
This structure is at utmost exaggerated the width that flange bores the big end of neck, the raw material holding up to, acquired intensity
And maximizing stiffness.This structure is applied to the structure matching with blind plate lid or heat exchanger tube sheet 26, and its design preferably adopts limited
Element method is carried out, and its manufacture process needs to ensure that screw thread centerline hole is vertical with flange sealing surface.Blind plate lid or heat exchanger
Tube sheet 26 passes through bolt 28 and nut 27 locking is connected to ring flange 11, and is realized and sealing surface boss 16 by gasket seal 29
Between sealing docking.
Embodiment 8
The six of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as shown in figure 17；The described flange cone big end of neck and flange ring equal in width, and
Design tapped through hole 30 on flange cone neck, the depth of screw thread is not less than the thickness of nut, that is, described flange is equipped with multiple hanging down
It is straight that described screwed hole is tapped through hole in bottom surface and be opened on the screwed hole of bottom surface, and using single ended bolt one end spin with should
Tapped through hole.
This structure is at utmost exaggerated the width that flange bores the big end of neck, retains more raw material, acquired intensity
And maximizing stiffness.This structure is applied to the structure matching with blind plate lid or heat exchanger tube sheet 26, and its design preferably adopts limited
Element method is carried out, and it manufactures it is critical to insure that screw thread centerline hole is vertical with flange sealing surface.
Further, described inner via hole has the necking taper seat of monoblock type necking taper seat or local；Described necking circle
The conical surface is unidirectional or two-way.Necking taper seat is to the diminishing taper seat of middle section position at opening.Unidirectional necking taper seat
It is located at inner via hole top located at cone neck small end or the big end of taper seat, can be local or inner via hole entirety internal face.Separately
A kind of form is that inner via hole both ends open is two-way is provided with necking taper seat, and it is big to be at opening diameter, and is inwardly gradually reduced；Can
Straight figure is had with centre.Specific embodiment such as embodiment 9 and 10.
Embodiment 9
The seven of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, described flange inner circle wall carries necking taper seat.Necking taper seat is suitable
In the thickness increasing the big end of neck flange from inwall direction, inwall local height taper seat 18 structure is as shown in figure 8, inwall is overall high
Degree taper seat 19 structure is as shown in Figure 9.Necking taper seat can also be designed to necking section and the cambered surface of non-necking section rounding off
Or curvilinear plane.Its design of flange of this inner diameter change is preferably carried out using finite element method.Although it increases blank
Weight, but with expanded outer diameter or increase height compared with, the blank weight that the method opinion is increased is relatively fewer.
The flange of this kind of interior wall construction can be applicable to the bobbin carriage of large heat exchanger.
Embodiment 10
The eight of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as shown in Figure 10, described flange inner circle wall carries necking Double-conical-surface 20.Contracting
Mouth taper seat is equivalent to the thickness increasing the big end of neck flange from inwall direction.Deflection due to intrinsic pressure effect lower flange ring makes thickness
Degree is subject to action of pulling stress near the section diameter increase of cone neck, and thickness reduces near the section diameter of flange port sealing surface
And it is subject to action of compressive stress, therefore, it is also a kind of rational structure that flange port corner is designed to horn mouth.Necking taper seat
Cambered surface or the curvilinear plane of necking section and non-necking section rounding off can be designed to.
Its design of flange of this inner diameter change is preferably carried out using finite element method.The method of this kind of interior wall construction
Orchid can be applicable to the bobbin carriage of large heat exchanger.
Further, described inner via hole internal face or/and cone neck outside wall surface are provided with the reinforcement radially extending.With specific reference to
Embodiment 11 and embodiment 12.
Embodiment 11
The nine of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as is illustrated by figs. 11 and 12, described flange inner circle wall is provided with and axially adds
Strong muscle.Described reinforcement highly protrudes from the top end face of described end groove.Interior reinforcement may extend to the circle with flange group welding
Cylinder section, interior reinforcement and flange and the weldering of cylinder 22 inwall group can improve that flange bores neck 13 and the anti-rotating of flange ring 11 is firm
Degree, the equivalent wall thickness converted as flange and cylinder 22 inwall of interior reinforcement 21 increases, can be relatively for Big Diameter Flange
Few inner reinforced plate metal obtains preferable strength and stiffness effect, it is to avoid the obvious increase of flange blank weight.
The flange of this inner wall belt reinforcement can be applicable to the bobbin carriage of large heat exchanger, and its design preferably adopts finite element analyses
Method is carried out, and its size should not hinder personnel's turnover internal overhaul, and its material should have solderability easily welding, also will
Avoid dielectric corrosion, its raw material can be put together by various offcut of steel plate.
Interior reinforcement should pass through gusset bevel complete penetraction and fusion in welding, in order to avoid aperture slots are drawn with the group weldering of flange and cylinder inwall
Play corrosion, the gas remained silent in gap is subject to operation thermal expansion to cause additional stress.If interior reinforcement group postwelding needs to be disappeared
Except welding stress heat treatment, then the sealing surface of flange should polish again after this heat treatment.
Inwall reinforcement can reduce the circulation area in flange, but this is for the circulation effect shadow of Big Diameter Flange connection
Ring very little, after fluid passes through these gussets, original circulation area and flow velocity will soon be recovered.
Embodiment 12
The ten of the specific embodiment of a kind of welding neck flange of the present utility model, the main technical schemes of the present embodiment and reality
Apply example 1 identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, here is no longer repeated.This reality
The difference applying example with embodiment 1 is, specifically, as shown in Figure 13 and Figure 14, described flange cone cervical part of esophagus outside wall surface is provided with vertical
To reinforcement, i.e. external reinforcing ribs 23.External reinforcing ribs 23 may extend to the cylinder section with flange group welding, external reinforcing ribs 23 and flange
And the weldering of cylinder inwall group can improve the anti-rotation dynamic stiffness that flange bores neck 13 and flange ring 11, external reinforcing ribs 23 are equivalent to convert as method
Blue and cylinder inwall wall thickness increases, and can obtain preferable intensity with relatively small number of outer gusset metal for Big Diameter Flange
With rigidity effect, it is to avoid the obvious increase of flange blank weight.
Its design of this flange with external reinforcing ribs 23 is preferably carried out using finite element method, and its size should not hinder
Hinder the assembly and disassembly of bolt and nut securing member, its material has solderability easily welding.External reinforcing ribs and flange and cylinder
Outer wall group weldering need not bevel complete penetraction and fusion in welding, only need tack welding, but weld seam should leave opening, in order to avoid remaining silent in gap
Gas is subject to operation thermal expansion to cause additional stress.
Finally it should be noted that above example is only in order to illustrating the technical solution of the utility model, rather than to this reality
With the restriction of novel protected scope, although having made to explain to this utility model with reference to preferred embodiment, this area general
Lead to it will be appreciated by the skilled person that the technical solution of the utility model can be modified or equivalent, without deviating from this
The spirit and scope of utility model technical scheme.
Claims (8)
1. a kind of welding neck flange it is characterised in that：Including flange ring, it is integrally connected to the cone neck on the upside of flange ring and cone neck top
The end groove of end integrally connected, the seal boss located at flange ring bottom surface, the inner via hole of longitudinally through welding neck flange, cone neck
The inside edge that the intersecting lens of taper seat and flange ring rotates outwardly over flange nut.
2. a kind of welding neck flange according to claim 1 it is characterised in that：The described cone big end of neck is provided with vertical straight figure.
3. a kind of welding neck flange according to claim 1 it is characterised in that：Described cone neck outside diameter and flange ring diameter
Identical.
4. a kind of welding neck flange according to claim 3 it is characterised in that：Described cone neck is provided with and multiple accommodates nut simultaneously
Deep gouge with nut external shape fits.
5. a kind of welding neck flange according to claim 3 it is characterised in that：Described flange be equipped with multiple perpendicular to bottom surface
And it is opened on the screwed hole of bottom surface, described screwed hole is tapped blind hole or tapped through hole.
6. a kind of welding neck flange according to claim 1 it is characterised in that：Described inner via hole has monoblock type necking circular cone
The necking taper seat of face or local；Described necking taper seat is unidirectional or two-way.
7. a kind of welding neck flange according to claim 1 it is characterised in that：Outside described inner via hole internal face or/and cone neck
Wall is provided with the reinforcement radially extending.
8. a kind of welding neck flange according to claim 7 it is characterised in that：Described reinforcement highly protrudes from described end
The top end face of groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866256.5U CN205978898U (en) | 2016-08-10 | 2016-08-10 | Long neck flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866256.5U CN205978898U (en) | 2016-08-10 | 2016-08-10 | Long neck flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205978898U true CN205978898U (en) | 2017-02-22 |
Family
ID=59977184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620866256.5U Active CN205978898U (en) | 2016-08-10 | 2016-08-10 | Long neck flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205978898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122625A (en) * | 2016-08-10 | 2016-11-16 | 茂名重力石化机械制造有限公司 | A kind of welding neck flange and method for designing thereof |
-
2016
- 2016-08-10 CN CN201620866256.5U patent/CN205978898U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122625A (en) * | 2016-08-10 | 2016-11-16 | 茂名重力石化机械制造有限公司 | A kind of welding neck flange and method for designing thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 525024 Guangdong City, Maoming Province Ring West Road, No. 91 Patentee after: Maoming gravity Petrochemical Equipment Co Ltd Address before: 525024 Maoming City, Guangdong Province West Road, Maoming City, the gravity of the Petrochemical Machinery Manufacturing Co., Ltd., Patentee before: The Challenge Petrochemical Machinery Corporation |