CN210860244U

CN210860244U - Small pull rod metal corrugated expansion joint

Info

Publication number: CN210860244U
Application number: CN201921342914.0U
Authority: CN
Inventors: 李敏
Original assignee: Chongqing Minte Metal Products Co ltd
Current assignee: Chongqing Minte Metal Products Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-06-26
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a little pull rod metal ripple expansion joint, take over in including, well takeover both ends all weld the bellows, and two bellows keep away from well takeover one end and all have welded the end pipe, two in the end pipe is kept away from, and take over one end and all have welded the flange ring, be provided with the pull rod assembly that the equidistance is the annular and distributes between well takeover and the end pipe, well takeover comprises two half takeovers, and the cover is equipped with the bush between two half takeovers, is equipped with locking mechanism between two half takeovers, the annular seal slot has all been opened to bush lateral wall both ends position department, and the equal joint of two annular seal slot inner walls has sealed rubber ring. The utility model discloses can conveniently clear up the maintenance to expansion joint inside, combine the locking mechanism who sets up simultaneously, make things convenient for the dismouting, reduce and maintain the degree of difficulty, improve work efficiency, two bellows of setting, the axial vibration in the absorption pipeline that can be fine.

Description

Small pull rod metal corrugated expansion joint

Technical Field

The utility model relates to an expansion joint technical field especially relates to a little pull rod metal ripple expansion joint.

Background

An expansion joint refers to a flexible element that effectively functions to compensate for axial deformation. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and easy deformation, can compensate the thermal expansion difference generated by the tube and the shell due to different wall temperatures, and reduces the axial load of the tube and the shell, thereby reducing the temperature difference stress of the tube, the tube plate and the shell and avoiding causing strength damage, instability damage and tube pull-out damage. The expansion joint has many kinds, and the common structures include wave, ring plate welding, clamping shell type and the like, wherein the wave expansion joint is most widely applied, and the ring plate welding expansion joint is only suitable for normal pressure or low pressure occasions.

The existing expansion joint is inconvenient to disassemble, assemble and clean and high in maintenance difficulty, so that a small pull rod metal corrugated expansion joint is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a small pull rod metal corrugated expansion joint.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a little pull rod metal corrugated expansion joint, includes well takeover, the bellows has all been welded at well takeover both ends, and two bellows keep away from well takeover one end and have all welded the end joint pipe, two the end joint pipe is kept away from well takeover one end and has all welded the flange ring, be provided with the pull rod assembly that the equidistance is annular distribution between well takeover and the end joint pipe, well takeover is taken over by two and is constituteed partly, and the cover is equipped with the bush between two partly takeovers, is equipped with locking mechanism between two partly takeovers, annular seal slot has all been opened to bush lateral wall both ends position department, and the equal joint of two annular seal slot inner walls.

Preferably, the pull rod assembly comprises a pull rod, connecting blocks are sleeved at two ends of the pull rod, and the two connecting blocks are respectively welded and fixed with the end connecting pipes and the side walls of the middle connecting pipes.

Preferably, the two ends of the pull rod are both provided with external thread parts, and the two ends of the pull rod are both screwed with fastening caps.

Preferably, the locking mechanism comprises a metal ring piece welded on one half of the connecting pipe, rectangular openings are formed in two sides of the side wall of the metal ring piece, fastening bolts are inserted into the inner walls of the two rectangular openings, the end portions of the two fastening bolts are hinged with hinged blocks, and the two hinged blocks are welded and fixed with two sides of the other half of the connecting pipe respectively.

Preferably, the two fastening bolts are respectively screwed with a screw cap, and the side walls of the two screw caps are respectively provided with anti-skid grains.

The utility model has the advantages that:

through the design of taking over in by two half takeovers of constituteing, can conveniently clear up the maintenance to expansion joint inside, combine the locking mechanism who sets up simultaneously, make things convenient for the dismouting, reduce and maintain the degree of difficulty, improve work efficiency, two bellows that set up, the axial vibration in the absorption pipeline that can be fine.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a small pull rod metal corrugated expansion joint provided by the present invention;

FIG. 2 is a partially enlarged schematic view of FIG. 1;

fig. 3 is a schematic structural view of a metal ring sheet of a small-pull-rod metal corrugated expansion joint provided by the present invention.

In the figure: the corrugated pipe comprises a 1-end connecting pipe, a 2-corrugated pipe, a 3-pull rod, a 4-connecting block, a 5-hinged block, a 6-metal ring sheet, a 7-fastening bolt, an 8-bushing, a 9-middle connecting pipe, a 10-sealing rubber ring, a 11-annular sealing groove and a 12-rectangular opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a little pull rod metal ripple expansion joint, including well takeover 9, bellows 2 has all been welded at well takeover 9 both ends, and two bellows 2 keep away from well takeover 9 one end and all have welded end pipe 1, two end pipe 1 keep away from well takeover 9 one end and all have welded the flange ring, be provided with the equidistance between well takeover 9 and the end pipe 1 and be the pull rod subassembly that the annular distributes, well takeover 9 comprises two half takeovers, and the cover is equipped with bush 8 between two half takeovers, be equipped with locking mechanism between two half takeovers, the annular seal slot 11 has all been opened to bush 8 lateral wall both ends position department, and two annular seal slot 11 inner walls all joint have sealed rubber ring 10.

The utility model discloses in, pull rod assembly includes pull rod 3, and connecting block 4 has all been cup jointed at 3 both ends of pull rod, two connecting blocks 4 respectively with end pipe 1 and well takeover 9 lateral walls welded fastening, external screw thread portion has all been opened at 3 both ends of pull rod, and the equal spiro union in 3 both ends of pull rod has the fastening cap, locking mechanism includes that the welding sets up the becket piece 6 on one of them half takeover, and becket piece 6 lateral wall both sides all open rectangle opening 12, two rectangle opening 12 inner walls all peg graft and have fastening bolt 7, and two fastening bolt 7 tip all articulate has articulated piece 5, and two articulated piece 5 respectively with other one half takeover both sides welded fastening, two fastening bolt 7 go up equal spiro union have the cap of turning round, and two are turned round the cap lateral wall and all opened and are had anti-skidding line.

The working principle is as follows: through two flange rings that set up, with expansion joint fixed mounting to suitable pipeline in, two bellows 2, axial vibration in can the absorption pipeline, better protection pipeline combines the locking mechanism who sets up simultaneously, makes things convenient for two half takeovers of dismouting, can realize that the expansion joint is by the middle part separately, conveniently clears up the maintenance to inside, also conveniently changes the maintenance alone simultaneously, reduces cost of maintenance.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a little pull rod corrugated metal expansion joint, includes well takeover (9), its characterized in that, bellows (2) have all been welded at well takeover (9) both ends, and two bellows (2) keep away from well takeover (9) one end and all have welded end joint pipe (1), two in keeping away from in end joint pipe (1) takeover (9) one end all has welded the flange ring, well takeover (9) and end joint pipe (1) between be provided with the equidistance and be the pull rod subassembly that the annular distributes, well takeover (9) are partly taken over by two and constitute, and the cover is equipped with bush (8) between partly takeover two, are equipped with locking mechanism between partly takeover two, bush (8) lateral wall both ends position department all opens annular seal groove (11), and the equal joint of two annular seal groove (11) inner wall has sealed rubber ring (10).

2. The small pull rod metal corrugated expansion joint as claimed in claim 1, wherein the pull rod assembly comprises a pull rod (3), connecting blocks (4) are sleeved at both ends of the pull rod (3), and the two connecting blocks (4) are respectively welded and fixed with the side walls of the end joint pipe (1) and the middle joint pipe (9).

3. The small pull rod metal corrugated expansion joint as claimed in claim 2, wherein both ends of the pull rod (3) are provided with external thread portions, and both ends of the pull rod (3) are screwed with fastening caps.

4. The small pull rod metal corrugated expansion joint as claimed in claim 3, wherein the locking mechanism comprises a metal ring piece (6) welded on one of the half connecting pipes, rectangular openings (12) are formed in both sides of the side wall of the metal ring piece (6), fastening bolts (7) are inserted into the inner walls of the two rectangular openings (12), hinged blocks (5) are hinged to the end portions of the two fastening bolts (7), and the two hinged blocks (5) are welded and fixed to both sides of the other half connecting pipe respectively.

5. The small pull rod metal corrugated expansion joint as claimed in claim 4, wherein two of the fastening bolts (7) are respectively screwed with a screw cap, and the side walls of the two screw caps are respectively provided with anti-skid lines.