CN201944475U

CN201944475U - Abrasion-resistant separating corrugation expansion joint

Info

Publication number: CN201944475U
Application number: CN2011200300830U
Authority: CN
Inventors: 贾建平; 李伟; 薛维法
Original assignee: BEIJING XINGDA CORRUGATED PIPE Co Ltd
Current assignee: BEIJING XINGDA CORRUGATED PIPE Co Ltd
Priority date: 2011-01-28
Filing date: 2011-01-28
Publication date: 2011-08-24
Anticipated expiration: 2021-01-28

Abstract

An abrasion-resistant separating corrugation expansion joint belongs to the field of an expansion compensating device for pipelines. Materials and specifications of connecting pipes and pipeline bodies are the same. A gap L between a long connecting pipe and a short connecting pipe (1 and 2) which are concentric left and right is arranged and the gap L can fully satisfy displacement quantity of compensation function of a corrugated pipe (4). The left port of the corrugated pipe (4) is welded to the long connecting pipe (1) through a left port ring (5), and the right port of the corrugated pipe is welded to the short connecting pipe (2) through a thick-wall connecting cylinder (6) and a right port ring (7). The outer wall of the right port of the long connecting pipe (1) is provided with a graphite packing sealing device (8) matched with the connecting cylinder (6). Filling-and-separating packing materials (10) are filled in a corrugation seal cavity (9) formed by the outer wall of the long connecting pipe (1), the left port ring (5), the corrugated pipe (4), the thick-wall connecting cylinder (6) and the graphite packing sealing device (8). Therefore, erosive abrasion of the corrugated pipe can be greatly reduced, service life is prolonged, and meanwhile the compensation function of the corrugated pipe is not affected. The abrasion-resistant separating corrugation expansion joint has the advantages of simple structure, easiness in operation and low cost.

Description

Wear-resisting baffle type corrugated expansion joint

Technical field

The utility model belongs to the expansion compensation device field that pipeline is used, and relates to wear-resisting baffle type corrugated expansion joint.

Background technique

In the prior art; the bellows chamber of corrugated expansion joint is made of thin-wall corrugated tube; in industries such as iron and steel, power plant; often to carry pulverized fuel ash class medium in the pipeline; this class medium is made up of irregular polyhedron particles, and it is fast to add flowing velocity, and the thin-walled of bellows is very easily broken by erosive wear; the guide shell that installs additional in the bellows chamber however how long promptly by stripping, bellows chamber is not played protective action.A kind of wear-resisting baffle type corrugated expansion joint of the market demand.

Summary of the invention

The technical problem that solves:

Change the structure of existing corrugated expansion joint, can overcome the deficiencies in the prior art, adopt the baffle type structure, can reduce greatly, alleviate the erosive wear that bellows is subjected to, prolong its working life, not influence the compensate function of bellows again, simple in structure, easy enforcement simultaneously, cost is low.

The technological scheme that adopts:

Wear-resisting baffle type corrugated expansion joint, comprise bellows, adapter and flange, it is characterized in that: take over identical with material, the specification of pipeline body, coaxial nipple by the band flange on the long pipe in left side and right side constitutes, and has the spacing L of the compensate function displacement amount that can fully satisfy bellows between the right output port of long pipe and the left port of nipple; The left port of bellows is connected on by the left end boxing on the outer wall of long pipe, after the right output port of the bellows welding heavy wall connecting cylinder, is connected on the outer wall of nipple by the right-hand member boxing again; Have graphite packing seal arrangement on the outer wall of the right output port of long pipe, and and the inwall of heavy wall connecting cylinder between constitute the sealing system that endwisely slips; The outer wall of long pipe and left end ring, bellows, heavy wall connecting cylinder and graphite packing seal arrangement surround the ripple Seal cage, fill up the real filler that intercepts of plug in the ripple Seal cage.

Beneficial effect:

Owing to adopt the baffle type structure, medium is entered after the corrugated expansion joint by adapter, at first blockage---under the iris action of graphite packing seal arrangement, medium is difficult to enter the ripple Seal cage, even there is a small amount of media particles to enter the ripple Seal cage, its flowing velocity also can subtract greatly, and owing to intercept the second blockage effect that filler is formed, the little material of medium can lose the erosive wear performance, therefore the thin-walled of bellows can not break because of the erosive wear of media particles, even and if first blockage effect inefficacy, second blockage also can play the second heavily effect of insurance; The heavy wall connecting cylinder part that is complementary with the compensate function displacement amount of bellows, the turbulent flow that medium can occur, but because the intensity of heavy wall connecting cylinder is greater than the pipeline body, and have enough wear allowances, can satisfy the demand fully, because the graphite packing in the graphite packing seal arrangement can play seal action, lubricating effect is arranged again, do not influence endwisely slipping of heavy wall line tube, and the spacing L between the left port of the right output port of long pipe and nipple can guarantee fully that the compensate function of bellows is unaffected; Therefore, the present invention can reduce, alleviate the erosive wear that bellows is subjected to greatly, can guarantee the compensate function of bellows again, simple in structure, easy enforcement simultaneously, and cost is low.

Description of drawings

Fig. 1, main assembly structural representation;

The structural representation of Fig. 2, clamp plate type graphite packing seal arrangement 8;

The structural representation of Fig. 3, O type groove type graphite packing seal arrangement 8;

Embodiment

Further explanation in detail in conjunction with the accompanying drawings;

As shown in Figure 1, take over identical with material, the specification of pipeline body, coaxial nipple 2 by the band flange 3 on the long pipe 1 in left side and right side constitutes, and has the spacing L of the compensate function displacement amount that can fully satisfy bellows 4 between the left port of the right output port of long pipe 1 and nipple 2; The left port of bellows 4 is welded on by left end ring 5 on the outer wall of long pipe 1, after the right output port of the bellows 4 welding heavy wall connecting cylinder 6, is welded on the outer wall of nipple 2 by right-hand member ring 7 again; Have graphite packing seal arrangement 8 on the outer wall of the right output port of long pipe 1, and and the inwall of heavy wall connecting cylinder 6 between constitute the sealing system that endwisely slips; The outer wall of long pipe 1 and left end ring 5, bellows 4, heavy wall connecting cylinder 6 and graphite packing seal arrangement 8 surround ripple Seal cage 9, fill up the real filler 10 that intercepts of plug in the ripple Seal cage 9; Intercept filler 10 and select high temperature resistant, wear-resisting, insulation for use, certain elasticity is arranged, have the lamination coating of thermal insulation property again, as aluminosilicate fiber cotton, and it is real ripple Seal cage 9 to be filled up plug as far as possible.

As shown in Figure 2, graphite packing seal arrangement 8 is for the structure of clamp plate type is, two ring-type clamping plate 11 that have interval S mutually are welded on the outer wall of right output port of long pipe 1, hit tight in the annular groove 12 of interval S and compress graphite packing 15;

As shown in Figure 3, graphite packing seal arrangement 8 is for the structure of groove type is, the ring flat-plate 13 with O type groove 14 is welded on the outer wall of right output port of long pipe 1, hits tight in the O type groove 14 and compresses graphite packing 15;

Graphite packing seal arrangement 8 is by constituting the sealing system that endwisely slips between the inwall of graphite packing 15 and heavy wall connecting cylinder 6.

The effect of heavy wall connecting cylinder 6 is the transitional functions that are connected with bellows 4, and is complementary with the compensate function displacement amount of bellows 4, increases the effect of actual internal area simultaneously in addition, and because its wall thickness, the ability of anti-erosive wear is better than the pipeline body.

The contrast result on trial, effect is very obvious.

Claims

1. wear-resisting baffle type corrugated expansion joint, comprise bellows, adapter and flange, it is characterized in that: take over identical with material, the specification of pipeline body, coaxial nipple by the band flange on the long pipe in left side and right side constitutes, and has the spacing L of the compensate function displacement amount that can fully satisfy bellows between the right output port of long pipe and the left port of nipple; The left port of bellows is connected on by the left end boxing on the outer wall of long pipe, after the right output port of the bellows welding heavy wall connecting cylinder, is connected on the outer wall of nipple by the right-hand member boxing again; Have graphite packing seal arrangement on the outer wall of the right output port of long pipe, and and the inwall of heavy wall connecting cylinder between constitute the sealing system that endwisely slips; The outer wall of long pipe and left end ring, bellows, heavy wall connecting cylinder and graphite packing seal arrangement surround the ripple Seal cage, fill up the real filler that intercepts of plug in the ripple Seal cage.

2. wear-resisting baffle type corrugated expansion joint according to claim 1, it is characterized in that: graphite packing seal arrangement (8) for the structure of clamp plate type is, the two ring-type clamping plate (11) that have interval S mutually are welded on the outer wall of right output port of long pipe (1), hit tight in the annular groove of interval S (12) and compress graphite packing (15); Perhaps graphite packing seal arrangement (8) is for the structure of groove type is, the ring flat-plate (13) with O type groove (14) is welded on the outer wall of right output port of long pipe (1), hits tight in the O type groove (14) and compresses graphite packing (15).