CN211667150U

CN211667150U - Prevent metal bellows of excessive displacement of expansion joint

Info

Publication number: CN211667150U
Application number: CN201922256488.5U
Authority: CN
Inventors: 吴敬文; 洪雅敏; 吴宝强
Original assignee: Derris Valve Technology Co ltd
Current assignee: Derris Valve Technology Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-13
Anticipated expiration: 2029-12-16

Abstract

The utility model belongs to the corrugated metal pipe field especially relates to a prevent corrugated metal pipe of excessive displacement of expansion joint. The to-be-solved technical problem of the utility model is to provide a metal bellows that flexible volume is big, prevent that the excessive displacement of inflation festival, non-deformable. A metal corrugated pipe for preventing an expansion joint from excessively displacing comprises a metal corrugated pipe and a limiting mechanism; the inner layer of the metal corrugated pipe is provided with a plurality of hollow channels at equal intervals along the circumferential direction, the limiting mechanism is arranged in the hollow channels, and the output end of the limiting mechanism is equal to the bottom end of the metal corrugated pipe; the top ends are matched; the utility model discloses reached flexible volume big, prevent the effect that the excessive displacement of inflation festival, non-deformable.

Description

Prevent metal bellows of excessive displacement of expansion joint

Technical Field

The utility model belongs to the corrugated metal pipe field especially relates to a prevent corrugated metal pipe of excessive displacement of expansion joint.

Background

The metal bellows can be roughly divided into two types in appearance, one is a welded bellows with a large expansion amount, and the other is a molded bellows with a small expansion amount. In terms of cost, the corrugated pipes need to be welded by precisely welding the inner diameter and the outer diameter of the wave plate of each corrugated pipe, so that the cost is high; the formed corrugated pipe is formed by continuous extrusion only by using hydraulic equipment, so the cost is lower. Regardless of the type of bellows, the common use is to seal movable machinery or as an expansion joint for vacuum lines, for vacuum, semiconductor, petrochemical, instrumentation, medical, aerospace and military applications.

Present corrugated metal pipe all has good performance at flexible volume, but it meets expend with heat and contract with cold repetition, produce because of the vibration of ground deformation or equipment in service and warp at the use to make corrugated metal pipe flexible volume variation, damage or the excessive displacement of expansion joint, with this corrugated metal pipe that needs the renewal, greatly increased the cost, and life is lower, consequently, need urgent need to develop a flexible volume big, prevent that the excessive displacement of expansion joint, non-deformable's corrugated metal pipe.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome current corrugated metal pipe and exist to meet repetition, because of the ground warp or the vibration of equipment in service and produce the deformation of expend with heat and contract with cold in the use to make corrugated metal pipe flexible quantitative become poor damage or the excessive displacement's of expansion joint shortcoming, the to-be-solved technical problem of the utility model is to provide a flexible volume is big, prevent the excessive displacement of expansion joint, non-deformable's corrugated metal pipe.

The utility model is achieved by the following concrete technical means:

a metal corrugated pipe for preventing an expansion joint from excessively displacing comprises a metal corrugated pipe and a limiting mechanism; a plurality of hollow channels are arranged on the inner layer of the metal corrugated pipe at equal intervals along the circumferential direction of the inner layer, a limiting mechanism is arranged in the hollow channels, and the output end of the limiting mechanism is matched with the bottom end and the top end of the metal corrugated pipe;

the limiting mechanism comprises a limiting block, a metal spring, a tracking block and a spring piece; the top end and the bottom end of the hollow channel are respectively provided with a limiting groove, a limiting block is matched with the limiting grooves in an inserted mode, the limiting block is located on the outer surface of the metal corrugated pipe and connected with the limiting block through a metal spring, a plurality of spring pieces are embedded on the outer surface of the metal spring at equal intervals along the height direction of the metal spring, the two sides of each spring piece are fixedly connected with tracking blocks, and the tracking blocks are in contact with the hollow channel.

Further, the number of the hollow channels is 4-16.

Further, the outer surface of the tracking block is the same as the inner side of the hollow channel in shape.

Further, the limiting block is shaped as a hemisphere.

Furthermore, the thickness of the hollow channel is not more than 0.1-0.3 time of the maximum thickness of the inner layer of the metal corrugated pipe.

Furthermore, the number of the spring pieces is 4-8.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses reached flexible volume big, prevent the effect that the excessive displacement of inflation festival, non-deformable.

1. This practical information meets under the relapse condition of expend with heat and contract with cold at the use, and the restriction piece in the stop gear can restrict corrugated metal pipe under the metal spring shrink for corrugated metal pipe can not stretch out and draw back overlength and warp, thereby prevents the excessive displacement of expansion joint, and because be metal spring between the restriction piece, metal spring has certain elongation, has increased corrugated metal pipe's flexible volume, makes corrugated metal pipe be difficult for splitting open, and simultaneously, corrugated metal pipe meets in the use and produces the deformation because of the ground warp or the vibration of equipment in service, and corrugated metal pipe can drive metal spring deformation at the deformation in-process, makes the spring leaf can push away the tracker to hollow passageway inlayer, thereby makes corrugated metal pipe inlayer non-deformable.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is the structural schematic diagram of the sectioning of the utility model.

The labels in the figures are: 1-metal corrugated pipe, 2-limiting mechanism, 21-limiting groove, 22-limiting block, 23-metal spring, 24-tracking block, 25-spring piece and 3-hollow channel.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

examples

A metal corrugated pipe for preventing an expansion joint from excessive displacement is shown in figures 1-2 and comprises a metal corrugated pipe 1 and a limiting mechanism 2; a plurality of hollow channels 3 are arranged on the inner layer of the metal corrugated pipe 1 at equal intervals along the circumferential direction of the metal corrugated pipe, a limiting mechanism 2 is arranged in the hollow channels 3, and the output end of the limiting mechanism 2 is matched with the bottom end and the top end of the metal corrugated pipe 1;

the limiting mechanism 2 comprises a limiting block 22, a metal spring 23, a tracking block 24 and a spring piece 25; the top end and the bottom end of the hollow channel 3 are respectively provided with a limiting groove 21, limiting blocks 22 are inserted and matched with the limiting grooves 21, the limiting blocks 22 are located on the outer surface of the metal corrugated pipe 1, the limiting blocks 22 are connected through metal springs 23, a plurality of spring pieces 25 are embedded on the outer surface of each metal spring 23 along the height direction of the spring piece at equal intervals, tracking blocks 24 are fixedly connected to the two sides of each spring piece 25, and the tracking blocks 24 are in contact with the hollow channel 3.

Under the repeated condition that metal bellows 1 meets expend with heat and contract with cold in the use, limiting block 22 in stop gear 2 can limit metal bellows 1 under metal spring 23 shrink, make metal bellows 1 can not stretch out and draw back overlength and warp, thereby prevent the excessive displacement of expansion joint, and because be metal spring 23 between limiting block 22, metal spring 23 has certain elongation, has increased metal bellows 1's flexible volume, make metal bellows 1 be difficult for splitting open, simultaneously, metal bellows 1 meets and produces the deformation because of the vibration of ground deformation or equipment in the operation in the use, metal bellows 1 can drive metal spring 23 at the deformation in-process, makes spring leaf 25 can push away tracking block 24 to hollow passageway 3 inlayer, thereby makes metal bellows 1 inlayer non-deformable.

Wherein, the number of the hollow channels 3 is 4-16; if too much is provided, the amount of metal corrugation is reduced.

Wherein, the outer surface of the tracking block 24 has the same shape as the inner side of the hollow channel 3; facilitating ejection of the tracking block 24.

Wherein, the limiting block 22 is shaped like a hemisphere; the flange connecting disc can be conveniently connected.

Wherein the thickness of the hollow channel 3 is less than or equal to 0.1-0.3 time of the maximum thickness of the inner layer of the metal corrugated pipe 1; the strength of the metal corrugated pipe 1 is ensured to the maximum extent.

Wherein, the number of the spring pieces 25 is 4-8; too much of a setting will result in a reduction in the amount of metal corrugation distortion.

Although the present disclosure has been described in detail with reference to the exemplary embodiments, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes can be made thereto without departing from the scope of the present disclosure.

Claims

1. A metal corrugated pipe for preventing an expansion joint from excessively displacing is characterized by comprising a metal corrugated pipe (1) and a limiting mechanism (2); a plurality of hollow channels (3) are arranged on the inner layer of the metal corrugated pipe (1) at equal intervals along the circumferential direction of the metal corrugated pipe, a limiting mechanism (2) is arranged in the hollow channels (3), and the output end of the limiting mechanism (2) is matched with the bottom end and the top end of the metal corrugated pipe (1);

the limiting mechanism (2) comprises a limiting block (22), a metal spring (23), a tracking block (24) and a spring piece (25); the top end and the bottom end of the hollow channel (3) are respectively provided with a limiting groove (21), a limiting block (22) is matched with the limiting groove (21) in an inserted mode, the limiting block (22) is located on the outer surface of the metal corrugated pipe (1), the limiting blocks (22) are connected through a metal spring (23), a plurality of spring pieces (25) are embedded on the outer surface of the metal spring (23) at equal intervals along the height direction of the outer surface of the metal spring, tracking blocks (24) are fixedly connected to the two sides of the spring pieces (25), and the tracking blocks (24) are in contact with the hollow channel (3.

2. A metal bellows for preventing excessive displacement of an expansion joint according to claim 1, wherein the number of the hollow passages (3) is 4-16.

3. A metal bellows for preventing excessive displacement of an expansion joint according to claim 1, wherein the outer surface of the tracking piece (24) has the same shape as the inner side of the hollow channel (3).

4. A metal bellows for preventing excessive displacement of an expansion joint according to claim 1, wherein the restricting piece (22) is shaped as a hemisphere.

5. The metal bellows for preventing the excessive displacement of the expansion joint according to claim 1, wherein the thickness of the hollow channel (3) is not more than 0.1-0.3 times the maximum thickness of the inner layer of the metal bellows (1).

6. The metal bellows for preventing excessive displacement of an expansion joint according to claim 1, wherein the number of the spring pieces (25) is 4-8.