Telescopic device for small-diameter corrugated pipe

Abstract

The utility model relates to a small-diameter corrugated pipe expansion device. For a soft foundation, a traditional steel corrugated pipe is low in capacity of adapting to differential settlement generated by the traditional steel corrugated pipe, and the phenomena of deformation, tension fracture and damage of the steel corrugated pipe are easily caused. The device comprises an inner connection corrugated plate, a plurality of screw rods and a plurality of springs, the inner connection corrugated plate is arranged on the outer ring of a corrugated pipe, and the inner connection corrugated plate is connected with the corrugated pipe through two flat flanges which are perpendicular to the inner connection corrugated plate and are respectively arranged at the pipe opening of the corrugated pipe; a plurality of screw rods are arranged between the two flat flanges at intervals along the inner side of the inner connecting corrugated plate, and two ends of the screw rods penetrate through the flat flanges respectively; springs for buffering and resetting are arranged at two ends of the screw rods close to two sides of the flat flanges respectively; and a limiting structure for limiting the spring is arranged on one side of each spring. The performance of the corrugated pipe for adapting to differential settlement can be improved, the application scene is expanded, deformation concentration is promoted, deformation is controllable, and later replacement and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of underground structures, in particular to a small-diameter bellows expansion and contraction device. Background Art

[0002] Corrugated steel is a new building material with excellent ductility and strong resistance to deformation. It also offers advantages such as quick and easy installation, reduced construction time, low processing costs, and environmental benefits. Currently, corrugated steel is widely used in transportation and municipal engineering projects to create components such as culverts, tunnels, underground passages, and underground pipelines.

[0003] Steel corrugated pipe refers to a threaded corrugated pipe used in culverts buried under roads and railways. It is a circular steel structure pipe made of corrugated steel plates. The corrugated steel structure is a flexible structure. For use in an environment with uneven foundation bearing capacity, uneven settlement will occur. Traditional steel corrugated pipes rely on their own flexible connection positions (joints) as expansion joints. For soft foundations, the ability of steel corrugated pipes to adapt to the uneven settlement they produce is low, which can easily cause deformation, cracking and damage to the steel corrugated pipes. Summary of the Invention

[0004] The purpose of the utility model is to provide a small-diameter bellows expansion and contraction device, so as to at least solve the problem that the current steel bellows have a low ability to adapt to uneven settlement.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0006] A small-diameter bellows expansion and contraction device, comprising an inner connecting corrugated plate, a plurality of screw rods, and a plurality of springs. The inner connecting corrugated plate is arranged on the outer ring of the bellows, and the inner connecting corrugated plate is connected to the bellows via two flat flanges perpendicular to the inner connecting corrugated plate and respectively arranged at the pipe openings of the bellows.

[0007] A plurality of screw rods are spaced apart and arranged between the two flat flanges along the inner side of the inner connecting corrugated plate, and both ends of the screw rods pass through the flat flanges respectively. The springs for buffering and resetting are respectively arranged on both sides of the flat flanges at both ends of the screw rods;

[0008] A limiting structure for limiting the spring is provided on one side of the spring.

[0009] Furthermore, both ends of the inner connecting corrugated plate are symmetrically arranged with inwardly vertical flanges.

[0010] Furthermore, a plurality of first bolt holes are arranged at intervals on the flange.

[0011] Furthermore, a plurality of second bolt holes and a plurality of third bolt holes are respectively reserved on the flat flange, a plurality of the second bolt holes are arranged on the outside of the corrugated pipe, and a plurality of the third bolt holes are arranged on the inside of the corrugated pipe.

[0012] Furthermore, the second bolt hole is arranged corresponding to the first bolt hole.

[0013] Furthermore, the diameter of the screw rod is smaller than the diameter of the third bolt hole, and both ends of the screw rod pass through the third bolt hole.

[0014] Furthermore, the springs are symmetrically arranged on both sides of the flat flange.

[0015] Furthermore, one end of the spring is fixed to the flat flange, and the other end is fixed to the screw rod.

[0016] Furthermore, the limiting structure is a nut.

[0017] Furthermore, the nut is fixed to a side of the spring away from the flat flange.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The utility model connects adjacent corrugated pipes through an internally connected corrugated plate and a flat flange, so that the corrugated pipe can be expanded and contracted, and by arranging a screw rod and a spring, the corrugated pipe can be buffered during the expansion and contraction process and can be reset after expansion and contraction deformation. The spring is limited by arranging a nut, so that the corrugated pipe can both expand and contract and control its excessive expansion and contraction, preventing the spring from being over-stretched or squeezed, thereby damaging the inner connecting corrugated plate of the outer ring, thereby ensuring the quality of the project. The expansion device of the utility model can not only improve the performance of the corrugated pipe in adapting to uneven settlement and expand the application scenarios, but also promote deformation concentration, achieve controllable deformation, and facilitate later replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0021] Figure 1 It is a longitudinal cross-sectional view of the utility model connected to a corrugated pipe;

[0022] Figure 2 yes Figure 1 A partial enlarged schematic diagram;

[0023] The symbols in the figure are:

[0024] 1- bellows, 2- internal connecting corrugated plate, 3- flat flange, 4- nut, 5- spring, 6- screw rod. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] At the same time, in the description of the present invention, the terms "first", "second", etc. are used only to distinguish descriptions and should not be understood as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that shown or described herein.

[0029] Example:

[0030] like Figure 1 and Figure 2 As shown, this embodiment provides a small-diameter bellows expansion and contraction device, which is arranged at a position where the foundation bearing capacity is uneven, and includes an inner connecting corrugated plate 2, a plurality of screw rods 6 and a plurality of springs 5. The inner connecting corrugated plate 2 is arranged around the outer ring of the bellows 1 to form a horizontally placed cylindrical shape. The left and right ends of the inner connecting corrugated plate 2 are respectively connected to the bellows 1 through flat flanges 3 perpendicular to the inner connecting corrugated plate 2 and arranged at the pipe mouth of the bellows 1.

[0031] In order to facilitate the connection between the inner connecting corrugated plate 2 and the flat flange 3, the two ends of the inner connecting corrugated plate 2 are respectively provided with flanges perpendicular to the inside, the two flanges are symmetrically arranged, and the length of the flanges does not exceed the lowest point of the inner connecting corrugated plate 2.

[0032] A plurality of first bolt holes are arranged at equal intervals on the flanges, the plurality of first bolt holes are distributed in a circular shape, and the first bolt holes on the two flanges are symmetrically arranged.

[0033] In this embodiment, the flat flange 3 is welded to the bellows 1, and a plurality of second bolt holes and a plurality of third bolt holes are reserved on the flat flange 3. The second bolt holes and the third bolt holes are distributed in a circular shape. The second bolt holes are arranged on the outside of the bellows 1, and the third bolt holes are arranged on the inside of the bellows 1.

[0034] The second bolt hole is arranged corresponding to the first bolt hole, and the inner connecting corrugated plate 2 and the flat flange 3 are fixed by bolts passing through the first bolt hole and the second bolt hole in sequence, so that the inner connecting corrugated plate 2 and the flat flange 3 form an internal hollow cylinder, and because the flat flange 3 and the corrugated pipe 1 are fixed, the inner connecting corrugated plate 2 and the corrugated pipe 1 are fixed.

[0035] Furthermore, a plurality of screw rods 6 are arranged at equal intervals along the inner ring of the inner connecting corrugated plate 2, and the screw rods 6 are arranged between the two flat flanges 3 and the two ends thereof pass through the third bolt holes on the flat flanges 3, thereby limiting the radial movement of the screw rods 6. The diameter of the screw rods 6 is smaller than the diameter of the third bolt hole, so that the screw rods 6 can move axially in the third bolt hole, so that when the corrugated tube 1 is expanded and contracted, the flat flange 3 can move left and right on the screw rods 6.

[0036] In order to provide buffering when the bellows 1 is extended and contracted, springs 5 are respectively provided on both ends of the screw rod 6 close to both sides of the flat flange 3. The springs 5 are symmetrically arranged on the left and right sides of the flat flange 3, and the springs 5 help to reset it after the extension and contraction deformation.

[0037] One end of the spring 5 is welded and fixed to the flat flange 3, and the other end is welded and fixed to the screw rod 6. When the bellows 1 expands and contracts, the flat flange 3 is driven to move left and right on the screw rod 6. When the flat flange 3 moves left and right, the spring 5 is stretched and squeezed. The elastic force generated by the stretching and squeezing of the spring 5 has a buffering effect on the expansion and contraction of the bellows 1.

[0038] Furthermore, a limiting structure for limiting the spring 5 is provided on one side of the spring 5 away from the flat flange 3 to prevent the spring 5 from being over-stretched or squeezed, thereby damaging the inner connecting corrugated plate 2 of the outer ring.

[0039] In this embodiment, the limiting structure is a nut 4 , which is fixed to the screw rod 6 through its own thread, so that the moving range of the flat flange 3 on the screw rod 6 is between the two nuts 4 .

[0040] The telescopic device of the utility model can not only improve the performance of the corrugated pipe in adapting to uneven settlement and expand the application scenarios, but also promote deformation concentration, achieve controllable deformation, and facilitate later replacement and maintenance.

[0041] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, modifications or substitutions can be made based on the concept of the present invention.

Claims

1. A small diameter bellows expansion device, characterized by: It comprises an inner connecting corrugated plate (2), a plurality of screw rods (6) and a plurality of springs (5), wherein the inner connecting corrugated plate (2) is arranged on the outer ring of the corrugated pipe (1), and the inner connecting corrugated plate (2) is connected to the corrugated pipe (1) via two flat flanges (3) perpendicular to the inner connecting corrugated plate (2) and respectively arranged at the pipe openings of the corrugated pipe (1); A plurality of screw rods (6) are spaced apart and arranged between the two flat flanges (3) along the inner side of the inner connecting corrugated plate (2), and both ends of the screw rods (6) pass through the flat flanges (3). The springs (5) for buffering and resetting are respectively arranged on both sides of the flat flanges (3) at both ends of the screw rods (6). One side of the spring (5) is provided with a limiting structure for limiting the spring (5).

2. A small diameter bellows expansion and contraction device according to claim 1, characterized in that: Both ends of the inner connecting corrugated plate (2) are symmetrically arranged with inwardly vertical flanges.

3. The small-diameter bellows expansion and contraction device according to claim 2, characterized in that: A plurality of first bolt holes are arranged on the flange at intervals.

4. The small-diameter bellows expansion and contraction device according to claim 1, characterized in that: A plurality of second bolt holes and a plurality of third bolt holes are respectively reserved on the flat flange (3); the plurality of second bolt holes are arranged on the outside of the corrugated pipe (1); and the plurality of third bolt holes are arranged on the inside of the corrugated pipe (1).

5. A small diameter bellows expansion and contraction device according to claim 3 or 4, characterized in that: The second bolt hole is arranged corresponding to the first bolt hole.

6. The small-diameter bellows expansion and contraction device according to claim 4, characterized in that: The diameter of the screw rod (6) is smaller than the diameter of the third bolt hole, and both ends of the screw rod (6) pass through the third bolt hole.

7. The small-diameter bellows expansion and contraction device according to claim 1, characterized in that: The springs (5) are symmetrically arranged on both sides of the flat flange (3).

8. The small-diameter bellows expansion and contraction device according to claim 1, characterized in that: One end of the spring (5) is fixed on the flat flange (3), and the other end is fixed on the screw rod (6).

9. The small-diameter bellows expansion and contraction device according to claim 1, characterized in that: The limiting structure is a nut (4).

10. The small-diameter bellows expansion and contraction device according to claim 9, characterized in that: The nut (4) is fixed to a side of the spring (5) away from the flat flange (3).

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