CN202501121U

CN202501121U - Tightly-connected bellows

Info

Publication number: CN202501121U
Application number: CN201220081160XU
Authority: CN
Inventors: 罗祥文; 周水根; 金建达; 王长安
Original assignee: Zhejiang Hongsen Machinery Co Ltd
Current assignee: Zhejiang Hongsen Machinery Co Ltd
Priority date: 2012-03-05
Filing date: 2012-03-05
Publication date: 2012-10-24
Anticipated expiration: 2022-03-05

Abstract

The utility model discloses a tightly-connected bellows. The tightly-connected bellows comprises a bellows. One end portion of the bellows is provided with an axial extension segment. A joint is sleeved on an outer side of the extension segment. A tubular inner liner connected in an expansion stamping manner is sleeved on an inner side of the extension segment. The extension segment structure is arranged on the end portion of the bellows, and the inner liner and the joint are respectively contacted with the inner side and the outer side of the extension segment so as to form tight connection force with surface contacts on both the inner side and the outer side of the extension segment, thereby substantially prolonging the service life of the bellows.

Description

Connect fastening bellows

Technical field

The utility model relates to a kind of pipe, bellows specifically.

Background technique

Bellows is a kind of housing with cylinder-shaped thin wall wrinkle of a plurality of transverse waves, and bellows has elasticity, under pressure, axial force, transverse force or moment of flexure effect, can produce displacement.With extensive, predominant use is the measuring cell as pressure measuring instruments to bellows, converts pressure to displacement or power in instrument and apparatus.The bellows tube wall is thinner, and sensitivity is higher, and measuring range is tens of handkerchiefs to tens of MPas.Because often there is displacement in bellows, the connected connecting tube of bellows is generally and is welded to connect along with long-time use, often occurs working life and the production safety that phenomenons such as solder joint gets loose have a strong impact on bellows easily.

China's utility model patent patent No. 200720302931.2 discloses a kind of double-wall corrugated pipe, and it comprises bellows, and described bellows is a double-wall corrugated pipe, and the enlarging circle in the enlarging of its double-wall corrugated pipe is the lenticular ring stiffener of step.This kind bellows does not propose to prevent technological scheme or the technical clarification that bellows and connecting tube solder joint annexation get loose.

Summary of the invention

The utility model provides a kind of simple in structure, long service life, has prevented to get loose, and connects fastening bellows.

A kind ofly connect fastening bellows, comprise bellows, described corrugated tube end is provided with the section of extending axially, and the outside, extension is with the joint that is welded to connect.This kind adopts corrugated tube end to form the extension structure, because the extension structure is that cylindric property contacts with joint, has increased area of contact greatly and improved the tightness of connection, prolonged bellows working life, prevent to become flexible.

Inboard, described corrugated tube end extension is with the tubular liner that the dilatancy punching press connects.This kind adopts corrugated tube end to form the extension structure, contacted respectively by both sides inside and outside the extension to connect liner and joint, and forming inside and outside both sides, extension all has the tightness of face contact to connect power.Connect power liner employing dilatancy punching press connection extension for further strengthening this kind tightness, bellows is that good tightness is connected with joint because the extension is formed in one just with bellows, has prolonged the working life of bellows greatly.

The described bellows tube wall outside is coated with net, and welding trim ring in the net outside is injury-free with protection bellows outer wall.

Described joint inboard is provided with step hole, the step hole adapter that is connected, and the step hole bottom surface is that end face is taken in the attachment face contact, makes to take over to have firm mounting structure.

The extension of described corrugated tube end, joint, liner three prevent to become flexible through the fixed connection property that solder joint is welded to connect further increase extension, joint, liner three.

The utility model is employed in corrugated tube end and forms the extension structure, is contacted respectively by both sides inside and outside the extension to connect liner and joint, and forming inside and outside both sides, extension all has the tightness of face contact to connect power, has prolonged the working life of bellows greatly.

Description of drawings

Fig. 1 looks the sectional structure schematic representation for the master of the utility model ripple pipe racks liner;

Fig. 2 is an A portion structure for amplifying schematic representation among Fig. 1;

Fig. 3 does not look the sectional structure schematic representation with the master of liner for the utility model bellows;

Fig. 4 is a B portion structure for amplifying schematic representation among Fig. 3.

Embodiment

Embodiment 1, connect fastening bellows referring to accompanying drawing 1,2, the utility model are a kind of, comprise bellows 6, bellows 6 ends are provided with the section of extending axially, and the outside, extension is with joint 2, and the inboard, extension is with the tubular liner 3 that the dilatancy punching press connects.The extension of bellows 6 ends, joint 2, liner 3 threes are welded to connect through solder joint 7.Solder joint 7 places can reserve the convenient welding of welding hole and improve welding quality.

Be coated with net 5 as the structure optimization bellows 6 tube walls outside, net 5 outsides welding trim ring 4.Joint 2 inboards are provided with step hole, and step hole is connected and takes over 1, and the step hole bottom surface is that 1 end face is taken in the attachment face contact.Joint 2 end faces are welded to connect with adapter 1.

Embodiment 2, referring to accompanying drawing 3,4; The utility model is another kind of to be connected identical with embodiment 1 basically both difference of fastening its structure of bellows and does; Liner 3 is not established so that the structure of bellows is simpler in embodiment 2 inboard, bellows 6 extension, is convenient to processing.

Claims

1. one kind connects fastening bellows, comprises bellows (6), and it is characterized in that: described bellows (6) end is provided with the section of extending axially, and the outside, extension is with the joint (2) that is welded to connect.

2. the fastening bellows of connection as claimed in claim 1 is characterized in that: inboard, described bellows (6) extension, end is with the tubular liner (3) that the dilatancy punching press connects.

3. the fastening bellows of connection as claimed in claim 1 is characterized in that: described bellows (6) the tube wall outside is coated with net (5), net (5) outside welding trim ring (4).

4. the fastening bellows of connection as claimed in claim 1 is characterized in that: described joint (2) inboard is provided with step hole, the step hole adapter (1) that is connected, and the step hole bottom surface is that (1) end face is taken in the attachment face contact.

5. according to claim 1 or claim 2 the fastening bellows of connection, it is characterized in that: the extension of described bellows (6) end, joint (2), liner (3) three are welded to connect through solder joint (7).