Pressure balance corrugated pipe

Abstract

The utility model relates to the technical field of corrugated pipes, in particular to a pressure balance corrugated pipe which comprises a corrugated pipe body and a butt joint mechanism at one port of the corrugated pipe body, the butt joint mechanism comprises a carrying disc fixedly arranged at one end of the corrugated pipe body, and the outer side end face of the carrying disc is fixedly connected with an outer clamping plate and an inner clamping plate from outside to inside. The outer surface of the outer clamping plate is of a threaded structure and sleeved with a threaded sleeve, a plurality of first limiting grooves are formed in the outer surface of the outer clamping plate in the radial direction at equal intervals, a first clamping ball is movably clamped in each first limiting groove, and a plurality of second limiting grooves are formed in the outer surface of the inner clamping plate in the radial direction at equal intervals. A second clamping ball is movably clamped in each second limiting groove, the threaded sleeve is rotated to make linear displacement on the outer surface of the outer clamping plate from left to right, the threaded sleeve gradually pushes the multiple first clamping balls rightwards and makes the first clamping balls move from left to right along the interiors of the first limiting grooves, and the first clamping balls gradually incline into a crack between the outer clamping plate and the inner clamping plate; and therefore, the inserted corrugated pipe is gradually clamped by the plurality of first clamping balls.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a pressure-balanced bellows. Background Art

[0002] Pressure-balanced bellows are often used as compensation elements between two straight pipe sections of fixed piers (seats, frames). In the pipeline system, the expansion joint of the pressure-balanced bellows mainly adopts the principle of Pascal statics to make the internal pressure self-balanced. When using bellows, it is often necessary to splice multiple sections of bellows. The common docking method is to connect and fix the two bellows at the interface with a threaded sleeve. This connection method is relatively simple, so that after a long period of use, the interface is easy to loosen, which directly reduces the connection strength between the two bellows, thereby affecting the normal use of the bellows. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the utility model provides a pressure-balanced bellows, which solves the problem that the common bellows are connected only by threaded sleeves, resulting in low connection strength.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure-balancing bellows, including a bellows and a docking mechanism at one end thereof, wherein the docking mechanism includes a carrier plate fixedly arranged at one end of the bellows, and the outer end surface of the carrier plate is respectively fixedly connected with an outer clamping plate and an inner clamping plate from the outside to the inside, the outer surface of the outer clamping plate is a threaded structure and is sleeved with a threaded sleeve, the outer surface of the outer clamping plate is provided with a plurality of first limiting grooves equidistantly along its radial direction, and a first clamping ball is movably clamped in each of the first limiting grooves, and the outer surface of the inner clamping plate is provided with a plurality of second limiting grooves equidistantly along its radial direction, and a second clamping ball is movably clamped in each of the second limiting grooves.

[0007] Preferably, a gap is provided between the outer clamping plate and the inner clamping plate for clamping the corrugated tube, and the length of the outer clamping plate is greater than that of the inner clamping plate.

[0008] Preferably, the length of the threaded sleeve is less than the length of the outer clamping plate and greater than the length of the first limiting groove, and the number of the first limiting groove and the second limiting groove are the same and correspond to each other inside and outside.

[0009] Preferably, the first limiting groove and the second limiting groove have the same shape and are both narrow on the left and wide on the right, and the rightmost edge of the first limiting groove is located to the left of the rightmost edge of the second limiting groove.

[0010] Preferably, a plurality of notches are equidistantly formed on the side surface of the carrier, the width of the notches at the edge of the carrier is narrower than the width at the inner position of the carrier, one side of the threaded sleeve is rotatably connected to a sleeve, and the sleeve is movably sleeved on the outside of the outer clamping plate.

[0011] Preferably, a plurality of tie rods are hinged on one side surface of the shaft sleeve via a plurality of hinge seats, each tie rod is movably inserted into the notch, and a stop ball is fixedly connected to one end of each tie rod.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a pressure-balanced bellows, which has the following beneficial effects:

[0014] By rotating the threaded sleeve to make it move linearly from left to right on the outer surface of the outer clamping plate, the threaded sleeve gradually pushes multiple first clamping balls to the right and moves them from left to right along the inside of the first limiting groove. The first clamping balls gradually tilt into the gap between the outer clamping plate and the inner clamping plate, so that the multiple first clamping balls gradually clamp the inserted corrugated tube. When the corrugated tube is clamped, the first clamping ball and the second clamping ball are in staggered positions inside and outside, which helps to increase the extrusion force of the two on the corrugated tube, thereby improving the connection strength of the corrugated tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the connection between two bellows and their docking mechanism of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the bellows and the docking mechanism at one end of the utility model;

[0018] Figure 3 This is a schematic diagram of the inner clamping plate structure in the docking mechanism of the utility model;

[0019] Figure 4 It is a schematic diagram of the connection structure of the carrier plate and the pull rod in the docking mechanism of the utility model.

[0020] Description of reference numerals:

[0021] 1. Bellows;

[0022] 2. Carrying plate; 21. Notch;

[0023] 3. outer clamping plate; 31. first limiting groove; 32. first clamping ball;

[0024] 4. threaded sleeve; 41. shaft sleeve; 42. tie rod; 43. ball stop;

[0025] 5. Inner clamping plate; 51. Second limiting groove; 52. Second clamping ball. DETAILED DESCRIPTION

[0026] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0027] like Figure 1-4 The embodiment of the utility model is shown. To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure-balanced bellows, comprising a bellows 1 and a docking mechanism at one end thereof, the docking mechanism comprising a carrier plate 2 fixedly arranged at one end of the bellows 1, the outer end surface of the carrier plate 2 being respectively fixedly connected with an outer clamping plate 3 and an inner clamping plate 5 from the outside to the inside, the outer surface of the outer clamping plate 3 being a threaded structure and being sleeved with a threaded sleeve 4, the outer surface of the outer clamping plate 3 being equidistantly provided with a plurality of first limiting grooves 31 along its radial direction, each of the first limiting grooves 31 being movably clamped with a first The first locking ball 32 is located at the leftmost position of the first limiting groove 31 in the initial state. At this time, the first locking ball 32 can rotate at any angle in the first limiting groove 31 and will not fall into the gap between the outer clamping plate 3 and the inner clamping plate 5. Since the first limiting groove 31 gradually widens from left to right, when the first locking ball 32 moves from left to right in the first limiting groove 31, it will gradually move into the gap between the outer clamping plate 3 and the inner clamping plate 5. The movement of the first locking ball 32 is to push it by rotating the threaded sleeve 4; the inner clamping plate 5 The outer surface is provided with a plurality of second limiting grooves 51 equidistantly along its radial direction, and a second clamping ball 52 is movably clamped in each second limiting groove 51. In the initial state, the second clamping ball 52 is at the rightmost end position of the second limiting groove 51 and can be rotated at any angle. At this time, the second clamping ball 52 will not fall into the internal space of the inner clamping plate 5, and at this time, the second clamping ball 52 cannot move to the left side of the second limiting groove 51. A gap is provided between the outer clamping plate 3 and the inner clamping plate 5 for clamping the corrugated pipe, and the length of the outer clamping plate 3 is greater than that of the inner clamping plate 5. The threaded sleeve 4 is less than the length of the outer clamping plate 3 and greater than the length of the first limiting groove 31. The number of the first limiting grooves 31 and the second limiting grooves 51 are the same and correspond to each other inside and outside. The first limiting grooves 31 and the second limiting grooves 51 have the same shape and are both narrow on the left and wide on the right. The rightmost edge position of the first limiting groove 31 is located on the left side of the rightmost edge position of the second limiting groove 51, so that after the corrugated tube is fixed, the first clamping ball 32 and the second clamping ball 52 are in a staggered position, which helps to increase the extrusion force of the two on the corrugated tube, thereby improving the connection strength of the corrugated tube.

[0028] Furthermore, a plurality of notches 21 are equidistantly provided on the side surface of the carrier 2. The width of the notches 21 at the edge of the carrier 2 is narrower than the width at the inner position of the carrier 2, so that the space at the opening of the notch 21 is smaller than the width at the inner center position thereof. A shaft sleeve 41 is rotatably connected to one side of the threaded sleeve 4. The shaft sleeve 41 is movably sleeved on the outside of the outer clamping plate 3. A plurality of tie rods 42 are hingedly connected to one side surface of the shaft sleeve 41 through a plurality of hinge seats. Each tie rod 42 is movably inserted into the notch 21, and a stopper ball 43 is fixedly connected to one end of each tie rod 42. When the pull rod 42 is clamped in the notch 21, first a certain pressure is applied along the opening of the notch 21 to the pull rod 42 so that the pull rod 42 can move inside the notch 21 when it is clamped in the center of the notch 21. The diameter of the blocking ball 43 at one end of the pull rod 42 is much larger than the size of the notch 21. Therefore, when the pull rod 42 is clamped in the notch 21, the movement range of the pull rod 42 and the threaded sleeve 4 is limited to a fixed value range by the blocking ball 43, thereby preventing the threaded sleeve 4 from being displaced too much on the outer surface of the outer splint 3 and affecting the optimal fixed position of the bellows.

[0029] When the above embodiment is working, when docking two bellows 1, first insert one end of a bellows into the gap between the outer clamping plate 3 and the inner clamping plate 5 and extend it to the deepest point, and make the wall of the bellows between the first clamping ball 32 and the second clamping ball 52, and then clamp each pull rod 42 into the notch 21 at its corresponding position, and then rotate the threaded sleeve 4 to make it move linearly from left to right on the outer surface of the outer clamping plate 3. When the threaded sleeve 4 moves to the right, it will first push a plurality of first clamping balls 32, and the first clamping balls 32 move from left to right along the inside of the first limiting groove 31, so that the first clamping balls 32 are The ball 32 gradually tilts into the gap between the outer clamping plate 3 and the inner clamping plate 5, so that multiple first clamping balls 32 gradually clamp the inserted bellows. When the bellows is clamped, the first clamping ball 32 and the second clamping ball 52 are in an inner and outer staggered position, which helps to increase the squeezing force of the two on the bellows, thereby improving the connection strength of the bellows. During the movement of the threaded sleeve 4, the shaft sleeve 41 is also driven to move. The movement range of the pull rod 42 and the threaded sleeve 4 is limited to a fixed value range by the blocking ball 43, thereby preventing the threaded sleeve 4 from displacing too much on the outer surface of the outer clamping plate 3 and affecting the optimal fixed position of the bellows.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-balancing bellows, comprising a bellows (1) and a docking mechanism at one end thereof, characterized in that: The docking mechanism comprises a carrier plate (2) fixedly mounted at one end of the corrugated tube (1); an outer clamping plate (3) and an inner clamping plate (5) are respectively fixedly mounted on the outer end surface of the carrier plate (2) from the outside to the inside; the outer surface of the outer clamping plate (3) is a threaded structure and is sleeved with a threaded sleeve (4); a plurality of first limiting grooves (31) are equidistantly arranged on the outer surface of the outer clamping plate (3) along its radial direction; a first clamping ball (32) is movably clamped in each of the first limiting grooves (31); a plurality of second limiting grooves (51) are equidistantly arranged on the outer surface of the inner clamping plate (5) along its radial direction; a second clamping ball (52) is movably clamped in each of the second limiting grooves (51).

2. The pressure-balanced bellows according to claim 1, characterized in that: A gap is provided between the outer clamping plate (3) and the inner clamping plate (5) for clamping the corrugated tube, and the length of the outer clamping plate (3) is greater than the length of the inner clamping plate (5).

3. The pressure-balanced bellows according to claim 1, characterized in that: The length of the threaded sleeve (4) is less than the length of the outer clamping plate (3) and greater than the length of the first limiting groove (31); the first limiting groove (31) and the second limiting groove (51) are the same in number and correspond to each other inside and outside.

4. The pressure-balanced bellows according to claim 1, characterized in that: The first limiting groove (31) and the second limiting groove (51) have the same shape and are both narrow on the left and wide on the right. The rightmost edge of the first limiting groove (31) is located to the left of the rightmost edge of the second limiting groove (51).

5. The pressure-balanced bellows according to claim 1, characterized in that: The side surface of the carrier (2) is provided with a plurality of notches (21) at equal intervals, the width of the notches (21) at the edge of the carrier (2) being narrower than the width at the interior of the carrier (2), one side of the threaded sleeve (4) is rotatably connected to a shaft sleeve (41), and the shaft sleeve (41) is movably sleeved on the outside of the outer clamping plate (3).

6. The pressure-balanced bellows according to claim 5, characterized in that: A plurality of pull rods (42) are hingedly connected to one side surface of the shaft sleeve (41) via a plurality of hinge seats. Each pull rod (42) is movably inserted into the notch (21), and a blocking ball (43) is fixedly connected to one end of each pull rod (42).

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