CN201081058Y

CN201081058Y - Thin-wall metal tube pressing flexible connecting pipe

Info

Publication number: CN201081058Y
Application number: CNU2007201295157U
Authority: CN
Inventors: 庞舜源; 庞铭德
Original assignee: 庞舜源; 庞铭德
Current assignee: Foshan protruding Pipe Industry Co., Ltd.
Priority date: 2007-08-08
Filing date: 2007-08-08
Publication date: 2008-07-02
Anticipated expiration: 2017-08-08

Abstract

The utility model discloses a retaining loose joint pipe fitting of a thin-walled metal pipe, which comprises a thin-walled pipe body, a pipe connection, paired fitting flanges and bolts which are used for connecting and fastening the flanges, wherein, a boss is radially raised on an end part of the thin-walled metal pip body; the pipe connection is also a thin-walled metal body; a flat cutting periphery is outwards turned at the port of the pipe connection; the flanges which are correspondingly buckled are respectively covered at the boss of the pipe body and the back of the flat cutting periphery of the pipe connection; a joint washer is arranged between the boss of the pipe body and the flat cutting periphery of the pipe connection; the bolts frap the flanges; the boss of the pipe body and the flat cutting periphery of the pipe connection oppositely clamp the joint washer to form a tight connection; in the design, the structure of the thin-walled pipe connection is improved, the flanges are used to achieve the tight connection with the thin-walled metal pipe, the metal consumption of the pipe connection is further reduced, thereby the manufacturing cost is reduced. The utility model has the advantages of simple operation, convenient construction connection, good sealing property, reliability and durability, etc.

Description

Thin metallic tubd is withheld the loose joint pipe fitting

Technical field

The utility model relates to the pipe fitting that is tightly connected in the field, particularly thin metallic tubd of liquid, gas delivery connection pipe fitting.

Background technique

The port of traditional thick-wall metal pipes hinge thread ways of connecting owing to will damage body and reserve the machining allowance of hinge thread, causes that the metallic material waste is serious, cost of production is high, is substituted by thin metallic tubd and connection pipe fitting gradually.As present more popular thin-wall metal bulge loop Placement, adopt pipe end diffusion moulding bulge loop, neither damage body, can save metallic material in a large number again, in the extensive use of normal domestic field.But the pipe joint that connects thin metallic tubd adopts stainless steel die casting or precision casting process usually, and the process pipe joint of making needs certain thickness requirement, otherwise can't moulding, as Chinese patent ZL03247902.6 disclosed " connection pipe fitting ".Because whole pipe joint wall thickness still causes metallic material to be consumed in a large number greater than more than wall thickness 2-3 times of thin-wall pipes, makes cost of production higher, these all are unreasonable generations of design owing to linkage structure.

The model utility content

The purpose of this utility model is the deficiency that overcomes the conventional art linkage structure, proposes a kind ofly to have that the sealing soundness is good, cost of production is low, the thin metallic tubd that connects that is easy to construct is withheld the loose joint pipe fitting.

The purpose of this utility model is achieved by the following technical solution: thin metallic tubd is withheld the loose joint pipe fitting, include the thin-walled body, pipe joint, the paired flange plate that cooperates, connect the bolt that the clamp flange dish is used; radially swell the end of thin-wall metal body boss; pipe joint also is the thin-wall metal body; the port of pipe joint turns up the outer rim of putting down mouth; the flange plate of corresponding fastening is placed in flat mouthful of outer rim behind of body boss and pipe joint respectively; be provided with seal washer between the flat mouth outer rim of body boss and pipe joint; bolt tightens up flange plate, flat mouthful of outer rim of body boss and pipe joint clamps seal washer formation in opposite directions and be tightly connected.Further, for avoiding the variation of joint bore, guarantee the consistent of body and internal diameter of pipe joint, the end of pipe joint extends out is convenient to the joint socket that is connected with body port and boss.For conveniently being tightly connected, the boss on the body can be the bulge loop of a whole circle, also can be the segmentation boss of equidistantly arranging.Be convenient location, butt joint, be placed in flange plate on body and the pipe joint and be respectively the male flange and the concave station flange that can corresponding negative and positive fasten.For adapting to the quick mounting or dismounting of pipe fitting, male flange adopts the lap joint flange of two semicircular ring of detachable one-tenth.For ease of on-site construction operations, the outer down tilt mouth outer rim of pipe joint and extend out joint socket be directly by the thin-wall metal body of pipe joint stretch, extrusion modling.For guaranteeing the cold and hot sealing reliability that collapses under the condition, the degree of depth of joint socket is that the be tightly connected interior base frame rank of back body port and joint socket also maintain the 2-5mm distance.

Such linkage structure has tangible advantage: the metal body need not carry out damaging processing, expands grand boss, the bulge loop of forming before need only connecting.Pipe joint also need not damaging cutting, need only can be tightly connected on the outer down tilt limit of port.Pipe joint more can adopt and stretch with the thin-wall metal tube of the same wall thickness of body or bending forms, need not adopt traditional die casting or the moulding of high temperature casting method, wall thickness, the consumptive material of pipe joint are greatly reduced, production time shortens, cost of production greatly reduces, but also it is fast to have installation speed, seals advantages such as firm performance is good.

Description of drawings

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

Fig. 2 is the schematic representation of lap joint flange;

Fig. 3 is embodiment two a structural representation.

Embodiment

Referring to Fig. 1, the thin-wall metal of present embodiment is withheld the loose joint pipe fitting mainly by the pipe joint 1, body 2, concave station flange 3, male flange 4, the cooperation conventional seals circle 5 that all are stainless steel, bolt 6 constitutes, pipe joint 1 is 90 ° a thin-winding pipe, one section of its end is formed with the joint socket 11 that internal diameter is slightly larger than body 2 external diameters by rolling expansion, and then forms a flat mouthful outer rim 12 in the port through flanging.Corresponding male flange 4 is placed in the behind of 1 flat mouthful of outer rim of pipe joint 12, and the end roll extrusion protuberance of thin-walled body 2 forms a circle bulge loop 21, and concave station flange 3 is placed in the back side of body 2 bulge loops 21, and male flange 4 fastens with concave station flange 3 corresponding yin yang complementarities.When body 2 is connected assembly with pipe joint 1, the joint socket 11 of the port of body 2 and pipe joint 1 over against, be placed in body 2 one circle bulge loops 21 concave station flange 3 behind be placed in 1 flat mouthful of outer rim of pipe joint 12 male flange 4 behind over against, seal ring 5 is placed in bulge loop 21 the place aheads of body 2, in the joint socket 11 of body 2 end insertion tube joints 1, seal ring 5 is between bulge loop 21 and the flat mouthful outer rim 12, tighten up the bolt 6 between concave station flange 3 and the male flange 4, at this moment, flat mouthful of outer rim 12 of male flange 4 pushing pipe joints 1, compress seal ring 5, the inner order opening of concave station flange 3 also pushes the bulge loop 21 of body 2 simultaneously, bulge loop 21 oppositely compresses seal ring 5, thus flat mouthful outer rim 12, bulge loop 21 clamps seal ring 5 in opposite directions, forms firm being tightly connected.In the present embodiment, the degree of depth of joint socket 11 preferably and body 2 bulge loops 21 to the length of port be complementary, after promptly tightening up fully, body 2 ports maintain the distance of 2-5mm apart from the interior base frame rank of joint socket 11, make pipe fitting that the deformation space of cold shrinkage and thermal expansion be arranged.

Embodiment two, referring to Fig. 3, on the basis of embodiment's one structure, body 2 ' on a circle bulge loop can change into the segmentation boss 21 of equidistant layout multistage ', boss 21 ' can play the equally effect of crush seal circle 5.

In addition to the implementation, as shown in Figure 2, the flange plate that is fastenedly connected can adopt lap joint flange 7, be that male flange is made of two detachable semicircular ring, semicircular ring has the screw of interspersed bolt 6, and like this, lap joint flange 7 can overlap at any time and be buckled on the pipe joint, also can pull down convenient on-the-spot construction at any time.In addition, pipe joint is except that above-mentioned 90 ° of bend pipes, and pipe fittings such as also available common straight-through tube, three-way pipe, four-way pipe, bend reducer are replaced, as long as the outer down tilt limit of tube opening.

Certainly, only enumerated two kinds of preferred implementation here, the protection category that other is equal to, structure roughly the same all should belong to this patent repeats no more here.

Claims

1. thin metallic tubd is withheld the loose joint pipe fitting, include the thin-walled body, pipe joint, the paired flange plate that cooperates, connect the bolt that the clamp flange dish is used, it is characterized in that: radially swell the end of thin-wall metal body boss, pipe joint also is the thin-wall metal body, the port of pipe joint turns up flat mouthful outer rim, the corresponding flange plate that fastens is placed in flat mouthful of outer rim behind of body boss and pipe joint respectively, be provided with seal washer between the flat mouthful of outer rim of body boss and pipe joint, bolt tightens up flange plate, and flat mouthful of outer rim of body boss and pipe joint clamps seal washer formation in opposite directions and be tightly connected.

2. pipe fitting according to claim 1, the end that it is characterized in that pipe joint extend out is convenient to the joint socket that is connected with body port and boss.

3. pipe fitting according to claim 1 and 2 is characterized in that the boss on the body can be the bulge loop of a whole circle, also can be the segmentation boss of equidistantly arranging.

4. pipe fitting according to claim 1 and 2 is characterized in that being placed in flange plate on body and the pipe joint and is respectively the male flange and the concave station flange that can corresponding negative and positive fasten.

5. pipe fitting according to claim 1 and 2 is characterized in that male flange adopts the lap joint flange of two semicircular ring of detachable one-tenth.

6. pipe fitting according to claim 1 and 2, it is characterized in that the outer down tilt mouth outer rim of pipe joint and extend out joint socket be directly by the thin-wall metal body of pipe joint stretch, extrusion modling.

7. pipe fitting according to claim 6, the degree of depth that it is characterized in that joint socket are that the be tightly connected interior base frame rank of back body port and joint socket also maintain the 2-5mm distance.