Adjustable expansion joint

Abstract

The utility model provides an adjustable expansion joint, which relates to the technical field of expansion joints, and comprises a first corrugated pipe, an adjusting component arranged on the first corrugated pipe, a limiting component arranged on the adjusting component, the adjusting component comprises a second corrugated pipe, a first flange plate is fixed on the second corrugated pipe, and a limiting rod is rotatably connected on the second corrugated pipe. According to the pipeline connecting device, when pipelines are not connected in the same straight line, an operator pulls the second corrugated pipe, and the first limiting groove formed in the limiting rod is matched with the limiting column, so that the movement of the second corrugated pipe can be limited; when the pipelines are located on the same straight line and the second corrugated pipe does not need to be bent, the limiting column is pulled out of the first flange plate, the limiting rod is rotated, so that when the second corrugated pipe is directly connected with the pipelines, the limiting rod cannot affect normal connection, and therefore the technical purpose that the expansion joint can be adjusted to be connected with the pipelines is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an adjustable expansion joint. Background Art

[0002] An expansion joint is an engineering structure component, usually used in pipeline systems or containers, for absorbing thermal expansion and contraction or displacement caused by factors such as temperature changes, mechanical vibrations or earthquakes. They are designed to expand, contract or bend under these conditions while maintaining the sealing and structural integrity of the pipeline or container.

[0003] The existing patent (Publication No.: CN205560096U) proposes an expansion joint, including a corrugated pipe. A flow guide cylinder is arranged inside the corrugated pipe. An inlet flange is arranged at one end of the corrugated pipe, and an outlet flange is arranged at the other end. The inner diameter of the inlet end of the flow guide cylinder is larger than the inner diameter of the outlet end of the flow guide cylinder. It is characterized in that a flanging structure is arranged at one end of the expansion joint.

[0004] The expansion joint of this utility model has flanging at one end of the expansion joint, making the two ends of the expansion joint different, thereby preventing the wrong installation of the expansion joint, improving the airtightness of the expansion joint, reducing the number of parts, and improving the reliability of the expansion joint.

[0005] However, in actual use, there are still the following deficiencies. For example, the existing expansion joints cannot meet the angle adjustment and pipeline connection. The expansion joints that cannot adjust the angle may cause excessive bending stress at the connection of the pipeline, thereby aggravating the wear of the pipeline material. The pipeline that bears inappropriate angle bending for a long time may accelerate material fatigue and shorten its overall service life. Improper angle adjustment may cause the fluid flow to be blocked and reduce the fluid transportation efficiency. Therefore, the utility model proposes an adjustable expansion joint to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose an adjustable expansion joint.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: An adjustable expansion joint, including a first corrugated pipe, an adjustment assembly is arranged on the first corrugated pipe, and a limit assembly is arranged on the adjustment assembly; the adjustment assembly includes a second corrugated pipe, a first flange is fixed on the second corrugated pipe, a limit rod is rotatably connected to the second corrugated pipe, a first limit groove is opened on the limit rod, a limit post is arranged on the first flange, and the limit post is slidably connected inside the limit rod.

[0008] As a preferred embodiment, the second corrugated pipe is fixed on the first corrugated pipe, an inner sleeve is arranged inside the first corrugated pipe, and a fixing block is fixed on the first corrugated pipe.

[0009] The beneficial effects of adopting the above further scheme are as follows: Since the second corrugated pipe is fixed on the first corrugated pipe, the second corrugated pipe can be fixedly communicated with the first corrugated pipe. Since an inner sleeve is arranged inside the first corrugated pipe, it is to reduce the structural vibration caused by the change of fluid flow characteristics when high-speed fluid flows through the first corrugated pipe and play a role in protecting the first corrugated pipe. Since a fixing block is fixed on the first corrugated pipe, the first corrugated pipe can play a role in supporting and fixing the fixing block.

[0010] As a preferred embodiment, a threaded rod is slidably connected to the fixing block, and a nut is threadedly connected to the threaded rod.

[0011] The beneficial effects of adopting the above further scheme are as follows: Since a threaded rod is slidably connected to the fixing block and a nut is threadedly connected to the threaded rod, the contraction distance of the first corrugated pipe can be controlled by adjusting the distance of the nut, which plays a role in limiting the contraction of the first corrugated pipe.

[0012] As a preferred embodiment, the limiting component includes a second flange and a rotating block. A second limiting groove is formed on the second flange, and the second flange is rotatably connected to the first flange.

[0013] The beneficial effects of adopting the above further scheme are as follows: When the first flange and the second flange need to be connected, first pull the limiting block to a certain length, and then rotate the rotating block into the second limiting groove.

[0014] As a preferred embodiment, a telescopic spring is arranged inside the rotating block, a limiting block is arranged on the rotating block, and the rotating block is fixed in the second limiting groove.

[0015] The beneficial effects of adopting the above further scheme are as follows: Release the limiting block to realize the preliminary positioning of the first flange and the second flange, which is convenient for the fixed connection of the first flange and the second flange.

[0016] As a preferred embodiment, one end of the telescopic spring is fixedly connected to the rotating block, and the other end of the telescopic spring is fixedly connected to the limiting block.

[0017] The beneficial effects of adopting the above further scheme are as follows: Since one end of the telescopic spring is fixedly connected to the rotating block and the other end of the telescopic spring is fixedly connected to the limiting block, the telescopic spring can provide an elastic force to the limiting block, so that the limiting block can be clamped on the second flange.

[0018] Compared with the prior art, the advantages and positive effects of the present utility model are as follows: In the present utility model, when the pipeline connections are not in a straight line, the operator pulls the second bellows, and through the cooperation of the first limiting groove formed on the provided limiting rod and the limiting column, the movement of the second bellows can be limited. When the pipelines are in a straight line and the second bellows does not need to be bent, the limiting column is pulled out from the first flange, and the limiting rod is rotated, so that when the second bellows is used for directly connecting the pipelines, the limiting rod will not affect the normal connection, thus solving the technical problem that the expansion joint can adjust the connection with the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic structural diagram of an adjustable expansion joint of the present utility model.

[0020] Figure 2 FIG. is a schematic structural diagram of the first bellows of an adjustable expansion joint of the present utility model.

[0021] Figure 3 FIG. is a schematic structural diagram of the adjusting assembly of an adjustable expansion joint of the present utility model.

[0022] Figure 4 FIG. is a schematic structural diagram of the limiting assembly of an adjustable expansion joint of the present utility model.

[0023] Reference numerals: 1, first bellows; 2, inner sleeve; 3, fixing block; 4, threaded rod; 5, nut; 6, adjusting assembly; 61, second bellows; 62, first flange; 63, limiting rod; 64, first limiting groove; 65, limiting column; 7, limiting assembly; 71, second flange; 72, second limiting groove; 73, rotating block; 74, telescopic spring; 75, limiting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1-4 shown, this embodiment provides a technical solution: an adjustable expansion joint, including a first bellows 1, an adjusting assembly 6 is arranged on the first bellows 1, and a limiting assembly 7 is arranged on the adjusting assembly 6; As Figure 1 and Figure 3As shown, the adjusting component 6 includes a second bellows 61. A first flange 62 is fixed to the second bellows 61. A limiting rod 63 is rotatably connected to the second bellows 61. A first limiting groove 64 is formed in the limiting rod 63. A limiting post 65 is provided on the first flange 62. The limiting post 65 is slidably connected within the limiting rod 63. In the case of a non-linear layout of the pipeline connection, the operator can pull the second bellows 61. By utilizing the interaction between the first limiting groove 64 on the preset limiting rod 63 and the limiting post 65, the effective restriction of the movement of the second bellows 61 is achieved. This design ensures that when the pipeline needs to be bent, the second bellows 61 can maintain the required position and angle. When the pipeline layout is adjusted to a straight line, the operator can remove the limiting post 65 from the first flange 62 and rotate the limiting rod 63 to an appropriate position. This action allows the second bellows 61 to be directly connected to the pipeline, while ensuring that the limiting rod 63 does not interfere with the normal pipeline connection process, thus solving the technical problem that the expansion joint can adjust the connection with the pipeline.

[0026] In the above solution, there is also a problem that when the first flange 62 and the second flange 71 need to be connected, the rapid positioning of the holes on the flange cannot be satisfied. For example, Figures 1-2 As shown: The second bellows 61 is fixed to the first bellows 1. An inner sleeve 2 is arranged inside the first bellows 1. A fixing block 3 is fixed to the first bellows 1. Since the second bellows 61 is fixed to the first bellows 1, the second bellows 61 can be fixedly communicated with the first bellows 1. Since the inner sleeve 2 is arranged inside the first bellows 1, it is to reduce the structural vibration caused by the change of the fluid flow characteristics when the high-speed fluid flows through the first bellows 1 and play a role in protecting the first bellows 1. Since the fixing block 3 is fixed to the first bellows 1, the first bellows 1 can play a role in supporting and fixing the fixing block 3. A threaded rod 4 is slidably connected to the fixing block 3. A nut 5 is threadedly connected to the threaded rod 4. Since the threaded rod 4 is slidably connected to the fixing block 3 and the nut 5 is threadedly connected to the threaded rod 4, the contraction distance of the first bellows 1 can be controlled by adjusting the distance of the nut 5, which plays a role in limiting the contraction of the first bellows 1.

[0027] For example Figure 1 and Figure 4As shown in the figure, the limit component 7 includes a second flange 71 and a rotating block 73. A second limit groove 72 is formed on the second flange 71. The second flange 71 is rotatably connected to the first flange 62. When the first flange 62 and the second flange 71 need to be connected, first pull the limit block 75 to a certain length, and then rotate the rotating block 73 into the second limit groove 72. A telescopic spring 74 is arranged inside the rotating block 73, and a limit block 75 is arranged on the rotating block 73. The rotating block 73 is fixed in the second limit groove 72. Release the limit block 75 to achieve the preliminary positioning of the first flange 62 and the second flange 71, which is convenient for the fixed connection between the first flange 62 and the second flange 71. One end of the telescopic spring 74 is fixedly connected to the rotating block 73, and the other end of the telescopic spring 74 is fixedly connected to the limit block 75. Since one end of the telescopic spring 74 is fixedly connected to the rotating block 73 and the other end of the telescopic spring 74 is fixedly connected to the limit block 75, the telescopic spring 74 can provide an elastic force to the limit block 75, so that the limit block 75 can clamp on the second flange 71.

[0028] Working principle: As Figures 1-4 shown in the figure, in the case of a non-linear layout of the pipeline connection, the operator pulls the second corrugated pipe 61, and uses the interaction between the first limit groove 64 on the preset limit rod 63 and the limit post 65 to effectively limit the movement of the second corrugated pipe 61. This design ensures that when the pipeline needs to be bent, the second corrugated pipe 61 can maintain the required position and angle. When the pipeline layout is adjusted to a straight line, the operator can remove the limit post 65 from the first flange 62 and rotate the limit rod 63 to an appropriate position. This action allows the second corrugated pipe 61 to be directly connected to the pipeline, and at the same time ensures that the limit rod 63 does not interfere with the normal pipeline connection process. When the first flange 62 and the second flange 71 need to be connected, first pull the limit block 75 to a certain length, then rotate the rotating block 73 into the second limit groove 72, and release the limit block 75 to achieve the preliminary positioning of the first flange 62 and the second flange 71, which is convenient for the fixed connection between the first flange 62 and the second flange 71.

[0029] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An adjustable expansion joint, comprising a first bellows (1), characterized in that: The first bellows (1) is provided with an adjustment component (6), and the adjustment component (6) is provided with a limit component (7); the adjustment component (6) comprises a second bellows (61), the second bellows (61) is fixed with a first flange (62), the second bellows (61) is rotatably connected to a limit rod (63), the limit rod (63) is provided with a first limit groove (64), the first flange (62) is provided with a limit column (65), and the limit column (65) is slidably connected in the limit rod (63).

2. An adjustable expansion joint according to claim 1, characterized in that: The second bellows (61) is fixed on the first bellows (1), an inner sleeve (2) is arranged inside the first bellows (1), and a fixing block (3) is fixed on the first bellows (1).

3. An adjustable expansion joint according to claim 2, characterized in that: A threaded rod (4) is slidably connected to the fixing block (3), and a nut (5) is threadedly connected to the threaded rod (4).

4. The adjustable expansion joint according to claim 1, characterized in that: The limiting assembly (7) comprises a second flange (71) and a rotating block (73); a second limiting groove (72) is provided on the second flange (71); and the second flange (71) is rotatably connected to the first flange (62).

5. An adjustable expansion joint according to claim 4, characterized in that: A telescopic spring (74) is arranged in the rotating block (73), a limiting block (75) is arranged on the rotating block (73), and the rotating block (73) is fixed in the second limiting groove (72).

6. An adjustable expansion joint according to claim 5, characterized in that: One end of the telescopic spring (74) is fixedly connected to the rotating block (73), and the other end of the telescopic spring (74) is fixedly connected to the limiting block (75).

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