Expansion joint structure

Abstract

The utility model relates to an expansion joint structure which comprises a guide cylinder, the structure comprises a corrugated pipe group, the corrugated pipe group wraps the guide cylinder, the corrugated pipe group comprises a first layer group and a second layer group, and an interlayer is formed between the first layer group and the second layer group; the structure further comprises a pumping and draining assembly, and the pumping and draining assembly is partially connected to the interlayer. The corrugated pipe set composed of the first layer set and the second layer set is arranged and wraps the guide cylinder to form inner and outer protection, the interlayer is further formed between the first layer set and the second layer set, the pumping and draining assembly is used for vacuumizing the interlayer, then the effective cold insulation and protection effects are achieved on the inner layer pipeline, and the service life of the inner layer pipeline is prolonged. Meanwhile, whether the first layer group or the second layer group leaks or not can be detected. In addition, the first layer set and the second layer set are each composed of a plurality of corrugated pipes, and the axial stress and the transverse stress of the expansion joint are further compensated.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, and in particular to an expansion joint structure. Background Technology

[0002] Expansion joints play a crucial role in piping systems, compensating for thermal expansion and contraction, and ensuring system sealing and stability. In cold-insulated piping, expansion joints not only need to fulfill these basic functions but also require consideration of their insulation performance to prevent cold loss and cold bridging. Especially in frigid environments, direct contact between the corrugated pipe and the external environment can easily lead to icing, affecting the functionality of the expansion joint. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an expansion joint structure to solve one or more problems in the prior art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] An expansion joint structure includes a flow guide tube. The structure includes a bellows assembly that covers the flow guide tube. The bellows assembly includes a first layer and a second layer, with an interlayer formed between the first layer and the second layer. The structure also includes an extraction assembly that is partially connected to the interlayer.

[0006] Furthermore, both the first layer group and the second layer group are composed of at least two corrugated pipes connected together.

[0007] Furthermore, the structure also includes a pipe assembly, which includes an end pipe. Flanges are provided on both sides of the structure, and one end of the end pipe is connected to the flange.

[0008] Furthermore, the corrugated ends of the first layer group and the second layer group are respectively connected to one end of the end tube.

[0009] Furthermore, the connecting pipe assembly also includes an intermediate pipe, and the connections between the corrugated pipes of the first layer group and the second layer group are all connected to the intermediate pipe.

[0010] Furthermore, the extraction assembly includes an adapter, a pressure gauge, and a connector, with the pressure gauge and the connector respectively connected to the adapter.

[0011] Furthermore, the adapter is also connected to the interlayer, and a valve body is also provided on the connector.

[0012] Furthermore, the structure also includes an adjustment assembly, which includes a support and a tie rod. The support is symmetrically arranged on both sides of the end tube, and the two ends of the tie rod are respectively connected to the support.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] This invention employs a corrugated pipe assembly consisting of a first layer and a second layer, both encased within a guide tube to form inner and outer layers of protection. An interlayer is formed between the first and second layers, and a vacuum is created in this interlayer using a vacuum extraction assembly, effectively insulating and protecting the inner pipe. Simultaneously, it can detect leaks in either the first or second layer. Furthermore, both the first and second layers are composed of multiple corrugated pipes, further compensating for the axial and lateral stresses of the expansion joint. Attached Figure Description

[0015] Figure 1 A schematic diagram of an expansion joint structure according to an embodiment of the present invention is shown.

[0016] The following labels are used in the attached diagram: 1. Flow guide tube; 2. Bellows assembly; 201. First layer assembly; 202. Second layer assembly; 3. Interlayer; 4. Exhaust assembly; 401. Adapter; 402. Pressure gauge; 403. Connector; 4031. Valve body; 5. Pipe assembly; 501. End pipe; 502. Intermediate pipe; 6. Flange; 7. Adjustment assembly; 701. Support; 702. Tie rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of an expansion joint structure proposed by this utility model is provided in conjunction with the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions. Terms such as "center," "side," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the expansion joint structure or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model, but are only used to conveniently and clearly assist in explaining the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable.

[0018] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] The following describes the specific structure of an expansion joint:

[0020] Please see Figure 1 The expansion joint structure of this embodiment includes a flow guide cylinder 1, which guides the flow of fluid, ensuring smooth flow through the expansion joint, reducing eddies and turbulence, thereby reducing fluid resistance within the pipe and improving the flow efficiency of the medium. Preferably, in extremely cold environments, a low-temperature medium can be circulated within the flow guide cylinder 1 to maintain a low-temperature state during flow. The structure includes a bellows assembly 2, which covers the flow guide cylinder 1. The bellows assembly 2 includes a first layer 201 and a second layer 202, with an interlayer 3 formed between the first layer 201 and the second layer 202. In this embodiment, the first layer 201 is the outer layer relative to the second layer 202, and the outer pipe can protect the inner pipe and the insulation layer.

[0021] Furthermore, both the first layer group 201 and the second layer group 202 are composed of at least two corrugated pipes connected together. Preferably, in this embodiment, both the first layer group 201 and the second layer group 202 are composed of two corrugated pipes connected together. The connection of multiple corrugated pipes further enhances the structure's ability to withstand lateral and axial stresses.

[0022] Furthermore, the structure also includes a pipe assembly 5, which includes an end pipe 501. Flanges 6 are provided on both sides of the structure, and one end of the end pipe 501 is connected to the flange 6. The corrugated ends of the first layer group 201 and the second layer group 202 are respectively connected to one end of the end pipe 501. The pipe assembly 5 also includes an intermediate pipe 502, through which the corrugated pipes of the first layer group 201 and the second layer group 202 are connected to each other, forming a sealed interlayer 3.

[0023] Furthermore, the structure also includes a draw-out assembly 4, which is partially connected to the interlayer 3.

[0024] The vacuum pump assembly 4 includes an adapter 401, a pressure gauge 402, and a connector 403. The pressure gauge 402 and the connector 403 are both connected to the adapter 401. The adapter 401 is also connected to the interlayer 3, and the connector 403 is equipped with a valve body 4031. One end of the connector 403 is connected to a vacuum pump device. By setting the pressure gauge 402 and adjusting the valve body 4031, a vacuum is created in the interlayer 3, significantly reducing the thermal impact of the inner cryogenic medium on the external environment and minimizing heat conduction. This ensures the stability and safety of the cryogenic medium, achieving a cooling insulation effect.

[0025] Furthermore, the structure also includes an adjustment component 7, which comprises a support 701 and a pull rod 702. The support 701 is symmetrically arranged on both sides of the end tubes 501, and the two ends of the pull rod 702 are respectively connected to the support 701. By adjusting the tightness of the pull rod 702, precise control of the bellows extension dimension can be achieved, thereby ensuring the accuracy of the expansion joint during installation. After installation, the adjustment component 7 is removed. In addition, the adjustment component 7 can also serve as a traction device for transportation.

[0026] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An expansion joint structure, comprising a guide tube, characterized in that: The structure includes a bellows assembly that covers the guide tube. The bellows assembly includes a first layer and a second layer, each consisting of at least two bellows connected together, forming a sandwich between the first layer and the second layer. The structure also includes an extraction assembly that is partially connected to the sandwich. Furthermore, the structure includes a connecting pipe assembly that includes an intermediate pipe, with the connections between the bellows of the first layer and the second layer all abutting the intermediate pipe.

2. The expansion joint structure as described in claim 1, characterized in that: The pipe assembly also includes an end pipe, and flanges are provided on both sides of the structure, with one end of the end pipe connected to the flange.

3. The expansion joint structure as described in claim 2, characterized in that: The corrugated ends of the first layer group and the second layer group are respectively connected to one end of the end tube.

4. An expansion joint structure as described in claim 3, characterized in that: The extraction assembly includes an adapter, a pressure gauge, and a connector, with the pressure gauge and the connector respectively connected to the adapter.

5. An expansion joint structure as described in claim 4, characterized in that: The adapter is also connected to the interlayer, and a valve body is also provided on the connector.

6. An expansion joint structure as described in claim 5, characterized in that: The structure also includes an adjustment component, which includes a support and a tie rod. The support is symmetrically arranged on both sides of the end tube, and the two ends of the tie rod are respectively connected to the support.

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