A device for supporting a flexible sleeve within a pipe

Abstract

This invention provides a device for supporting a flexible sleeve inside a pipe. The pipe includes a hollow chamber with both ends connected. The flexible sleeve is disposed within the chamber, forming a cavity with the inner wall of the pipe to accommodate a solid anti-corrosion powder. The device includes at least two support mechanisms and a limiting mechanism disposed between the support mechanisms to restrict the radially inward movement of the support mechanisms. The support mechanisms and the limiting mechanism together form a ring structure to allow circumferential support of the flexible sleeve. The limiting mechanism is configured to allow axial movement. In this way, after the limiting mechanism disengages from the support mechanisms, the support mechanisms can move radially and disengage from the flexible sleeve to the outside. This reduces the contact area between the device and the solid anti-corrosion powder during outward movement, thereby reducing friction.

Description

Technical Field

[0001] This utility model relates to the field of pipeline corrosion protection technology, and in particular to a device for supporting a flexible sleeve inside a pipeline. Background Technology

[0002] Pipelines are widely used in fluid transport to construct paths for fluid movement. However, when pipelines are used to transport corrosive fluids, corrosion protection treatment is generally required on the inner walls of the pipelines.

[0003] In existing technologies, such as Figure 1 As shown, when corrosion protection is required for pipe 10, a flexible sleeve 20 with a diameter smaller than that of chamber 102 is typically installed inside chamber 102, forming a cavity 30 between the flexible sleeve 20 and the inner wall of the pipe. Solid anti-corrosion powder is then filled into the cavity 30, and a force is applied to the powder, causing it to adhere to the inner wall of the pipe. This method completes the corrosion protection treatment of the pipe.

[0004] In this process, to ensure that the flexible sleeve 20 can still form a stable cavity 30 with the inner wall of the pipe under stress, a cylindrical mold is usually installed inside the flexible sleeve 20 to support it. In industrial production, the cylindrical mold is usually made of rigid tubing.

[0005] While this setup effectively prevents corrosion, when the solid anti-corrosion powder is filled and the rigid pipes and flexible sleeves need to be removed, the rigid pipes and solid anti-corrosion powder are in contact with each other. During the process of applying force to the rigid pipes to move them outward, friction is generated between the rigid pipes and the solid anti-corrosion powder along the circumference. This friction is relatively large and can easily damage the filled solid anti-corrosion powder. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a device for supporting a flexible sleeve inside a pipe. To achieve the above objective, this utility model adopts the following technical solution: A device for supporting a flexible sleeve inside a pipe, the pipe including an outer wall that encloses a hollow cavity with open ends, the flexible sleeve disposed within the cavity and forming a cavity together with the radially inner side of the outer wall, the cavity being configured to accommodate a solid anti-corrosion powder. The device includes at least two support mechanisms and a limiting mechanism disposed between the support mechanisms to restrict the radially inward movement of the support mechanisms, such that the support mechanisms and the limiting mechanism together form a ring structure to allow circumferential support for the flexible sleeve. The limiting mechanism is configured to allow axial movement, so that after the limiting mechanism and the supporting mechanism are disengaged, the supporting mechanism can move out of the flexible sleeve and into the outside in a manner that disengages from the flexible sleeve, thereby reducing the frictional force on the solid anti-corrosion powder.

[0007] Furthermore, the support mechanism includes an outer ring, an abutment portion connected to the radially inner side of the outer ring and extending along the outer ring, the abutment portion and the outer ring together forming a boss, and the limiting mechanism includes a first limiting portion disposed between the bosses and abutting against each other with the bosses, so that the bosses allow the radially inward movement of the first limiting portion to be restricted.

[0008] Furthermore, the curvature of the radially outer side of the first limiting portion is configured to be equivalent to the curvature of the radially outer side of the outer ring, so that the first limiting portion and the outer ring are allowed to jointly support the flexible sleeve.

[0009] Furthermore, the surface area of ​​the radially outer side of the first limiting part is set to be smaller than the surface area of ​​the outer ring, so as to reduce the friction between the device and the solid anti-corrosion powder when the device moves out of the flexible sleeve.

[0010] Furthermore, the abutment portion is arranged along the radially inner side of the outer ring and is fixed to the outer ring, and the abutment portion extends at the end of the outer ring to form a boss, thereby improving the radially inward force-bearing performance of the support mechanism.

[0011] Furthermore, the limiting mechanism also includes a second limiting part located radially inside the first limiting part and fixed to the first limiting part. The second limiting part is configured to have a curvature comparable to that of the abutting part and allows it to abut against the abutting part to support the abutting part.

[0012] Furthermore, the support mechanism includes at least two arc-shaped support portions, and the limiting mechanism includes a connecting portion disposed between the arc-shaped support portions and allowing the arc-shaped support portions to be connected together, so that the arc-shaped support portions and the connecting portion can jointly support the flexible sleeve.

[0013] Furthermore, each of the arc-shaped support portions has a receiving groove along its axial direction on both sides, and each of the connecting portions has a connector on both sides. The connector is configured to be disposed within the receiving groove to restrict the radial inward movement of the arc-shaped support portion and the connecting portion.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention comprises at least two support mechanisms and a limiting mechanism located between the support mechanisms to restrict the radially inward movement of the support mechanisms. The support mechanisms and the limiting mechanism together form a ring structure to allow circumferential support of the flexible sleeve. The limiting mechanism is configured to allow axial movement. In this way, after the limiting mechanism disengages from the support mechanisms, the support mechanisms can move radially and disengage from the flexible sleeve to the outside. This reduces the contact area between the device and the solid anti-corrosion powder during outward movement, thereby reducing friction. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the pipe and the flexible sleeve working together in the prior art according to the present utility model embodiment; Figure 2 This is a schematic diagram of the overall structure of the first embodiment of the device for supporting the flexible sleeve inside a pipe according to the present invention; Figure 3 This is a schematic diagram of the overall structure of the support mechanism according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of the limiting mechanism in the first embodiment of this utility model; Figure 5 This is a schematic diagram of the overall structure of the second embodiment of the device for supporting the flexible sleeve inside a pipe according to the present invention.

[0016] In the above figures: pipe 10, outer wall 101, chamber 102, flexible sleeve 20, cavity 30, device 100 for supporting the flexible sleeve inside the pipe, support mechanism 1, outer ring 11, abutment part 12, boss 13, arc-shaped support part 14, receiving groove 141, limiting mechanism 2, first limiting part 21, second limiting part 22, connecting part 23, connecting piece 231. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1: To better understand the purpose, structure, and function of this utility model, the following detailed description, in conjunction with the accompanying drawings, describes a device for supporting a flexible sleeve inside a pipe.

[0019] like Figure 1As shown, the pipe 10 typically includes an outer wall 101 that encloses a hollow chamber 102 with both ends connected. The chamber 102 is circular. In this embodiment, the flexible sleeve 20 is also circular, but its diameter is smaller than that of the chamber 102. With this arrangement, when the flexible sleeve 20 is placed in the chamber 102, it forms a cavity 30 together with the radially inner side of the outer wall 101. In the illustrated embodiment, the cavity 30 is configured to accommodate a solid anti-corrosion powder.

[0020] It should be noted that, as Figure 1 As shown, the flexible sleeve 20 is configured as a hollow structure to accommodate the support device 100. In this way, when the support device 100 is placed inside the flexible sleeve 20, the support device 100 can apply a force to the flexible sleeve 20 in the circumferential direction. This allows the flexible sleeve 20 to be stably positioned within the chamber 102, thereby forming a stable cavity 30 between the flexible sleeve 20 and the chamber 102. This configuration allows the solid anti-corrosion powder to be stably filled within the cavity 30.

[0021] Figure 2 The schematic diagram illustrates the overall structure of a device for supporting a flexible sleeve inside a pipe according to the present invention. In such a way... Figure 1 In the illustrated embodiment, the device 100 for supporting the flexible sleeve inside the pipe includes at least two support mechanisms 1 and a limiting mechanism 2 disposed between the support mechanisms 1 to restrict the radially inward movement of the support mechanisms 1. In this embodiment, the support mechanisms 1 and the limiting mechanism 2 together form a ring structure. In this way, the support mechanisms 1 and the limiting mechanism 2 can support the flexible sleeve 20 circumferentially.

[0022] In the illustrated embodiment, such as Figure 2 As shown, the limiting mechanism 2 is configured to allow axial movement so that the limiting mechanism 2 can disengage from the support mechanism 1, and so that after the limiting mechanism 2 and the support mechanism 1 disengage from each other, the support mechanism 1 can move from the flexible sleeve 20 to the outside in a manner that disengages from the flexible sleeve 20, thereby reducing the frictional force on the solid anti-corrosion powder.

[0023] Specifically, such as Figure 2As shown, in this configuration, when the device 100 needs to support the flexible sleeve 20 to form a stable cavity 30 between the outer wall 101 and the flexible sleeve 20, firstly, the flexible sleeve 20 is placed in the chamber 102, and a support mechanism 1 and a limiting mechanism 2 are installed inside the flexible sleeve 20, with the support mechanism 1 and the limiting mechanism 2 abutting against each other, thus jointly supporting the flexible sleeve 20. In this way, a stable cavity 30 is formed between the outer wall 101 and the flexible sleeve 20. Therefore, solid anti-corrosion powder can be stably filled into the cavity 30, thereby completing the anti-corrosion operation on the inner wall of the pipe 10.

[0024] However, when it is necessary to remove the device 100 from the flexible sleeve 20, a force is applied to the limiting mechanism 2 along the axial direction, thereby causing the limiting mechanism 2 and the support mechanism 1 to disengage from each other and move out of the chamber 102. At this time, a force is applied to the support mechanism 1 along the radial direction, thereby causing the support mechanism 1 to move radially and disengage from the flexible sleeve 20.

[0025] Then, an axial force is applied to the support mechanism 1, causing it to move from the chamber 102 to the outside. This allows the device 100 to be disassembled from the flexible sleeve 20. In this way, the friction between the device 100 and the solid anti-corrosion powder located on the inner wall of the pipe 10 is reduced, thereby allowing the solid anti-corrosion powder to adhere stably to the inner wall of the pipe 10.

[0026] Specifically, in this process, it is only necessary to move the limiting mechanism 2 into the outside by making it come into contact with the solid anti-corrosion powder. This reduces the contact area between the device 100 and the solid anti-corrosion powder when it moves from the chamber 102 to the outside.

[0027] In one embodiment, such as Figure 3 As shown, the support mechanism 1 includes an outer ring 11 and an abutment portion 12 connected to the radially inner side of the outer ring 11. The curvature of the radially outer side of the abutment portion 12 is configured to be equivalent to the curvature of the radially inner side of the outer ring 11, and the abutment portion 12 extends along the outer ring 11. In this way, a boss 13 can be formed together between the abutment portion 12 and the outer ring 11.

[0028] Meanwhile, in this embodiment, such as Figure 2 , 4 As shown, the limiting mechanism 2 includes a first limiting part 21, which is disposed between the bosses 13 and abuts against each other. In this way, the first limiting part 21 can limit the radially inward movement of the outer ring 11.

[0029] In addition, such as Figure 2 , 4 As shown, the boss 13 can also restrict the radial inward movement of the first limiting part 21. Therefore, when the outer ring 11 and the first limiting part 21 are disposed within the flexible sleeve 20, they can be stably connected together and together form a ring structure, thereby stably supporting the flexible sleeve 20.

[0030] According to a preferred embodiment of the present invention, such as Figure 2 , 3 As shown in Figure 4, the surface area of ​​the radially outer side of the first limiting part 21 is set to be smaller than the surface area of ​​the outer ring 11. In this way, the frictional force generated between the device 100 and the solid anti-corrosion powder when the device 100 moves from the flexible sleeve 20 to the outside can be further reduced.

[0031] In one embodiment, such as Figure 2 As shown, the abutment portion 12 surrounds the radially inner side of the outer ring 11 and is fixed to the outer ring 11, and the abutment portion 12 extends at the end of the outer ring 11 to form a boss 13. In this way, the radially inward force-bearing performance of the support mechanism 1 can be improved.

[0032] According to a preferred embodiment of the present invention, such as Figure 4 As shown, the limiting mechanism 2 further includes a second limiting part 22 located radially inside the first limiting part 21 and fixedly attached to it. The second limiting part 22 is configured to have a curvature comparable to that of the abutment part 12 and allows it to abut against the abutment part 12 to support it. In this way, the radially inward force-bearing performance of the device 100 can be improved.

[0033] Example 2: Figure 5 The diagram illustrates the specific structure of a second embodiment of the device for supporting a flexible sleeve inside a pipe according to the present invention. This embodiment differs from the first embodiment in that it incorporates a different support mechanism 1 and a different limiting mechanism 2.

[0034] In this embodiment, as Figure 5 As shown, the support mechanism 1 includes at least two arc-shaped support portions 14, and the limiting mechanism 2 includes a connecting portion 23 disposed between the arc-shaped support portions 14, allowing the arc-shaped support portions 14 to be connected together. In this way, the arc-shaped support portions 14 and the connecting portion 23 can be connected to each other and together form a ring structure. Thus, they can jointly support the flexible sleeve 20.

[0035] In the illustrated embodiment, such as Figure 5As shown, a receiving groove 141 is provided on both sides of each of the arc-shaped support portions 14 along its axial direction. At the same time, a connector 231 is provided on both sides of each of the connecting portions 23. The connector 231 is configured to be disposed within the receiving groove 141 to restrict the radial inward movement of the arc-shaped support portion 14 and the connecting portion 23.

[0036] In this configuration, such as Figure 5 As shown, when it is necessary for the device 100 to support the flexible sleeve 20 so that a stable cavity 30 is formed between the outer wall 101 and the flexible sleeve 20, firstly, the flexible sleeve 20 is placed in the cavity 102, and an arc-shaped support portion 14 is provided in the flexible sleeve 20 in a corresponding manner.

[0037] Simultaneously, the connecting portion 23 is disposed at the end of the arc-shaped support member 14, and the connecting member 231 is positioned within the receiving groove 141. Then, an axial force is applied to the connecting member 231, causing it to move axially. During this process, the connecting member 231 continuously moves within the receiving groove 141. Thus, the arc-shaped support member 14 and the connecting portion 23 are stably connected together, jointly supporting the flexible sleeve 20.

[0038] However, when it is necessary to remove the device 100 from the flexible sleeve 20, an axial force is applied to the connecting portion 23, causing the connecting member 231 to continuously move along the receiving groove 141 until the connecting portion 23 and the arc-shaped support portion 14 disengage from each other. At this time, a radial force is applied to the arc-shaped support portion 14, causing the arc-shaped support portion 14 to move radially and disengage from the flexible sleeve 20.

[0039] Then, an axial force is applied to the arc-shaped support 14, causing it to move from the chamber 102 to the outside. This allows the device 100 to be disassembled from the flexible sleeve 20. In this way, the frictional force between the device 100 and the solid anti-corrosion powder located on the inner wall of the pipe 10 is reduced, allowing the solid anti-corrosion powder to adhere stably to the inner wall of the pipe 10.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for supporting a flexible sleeve inside a pipe (10), the pipe (10) including an outer wall (101) enclosing a cavity (102) that is open at both ends and hollow inside, the flexible sleeve (20) being disposed in the cavity (102) and forming a cavity (30) together with the radially inner side of the outer wall (101), the cavity (30) being configured to allow for the containment of a solid anti-corrosion powder. characterized in that The device (100) includes at least two support mechanisms (1) and a limiting mechanism (2) disposed between the support mechanisms (1) to restrict the radially inward movement of the support mechanisms (1), such that the support mechanisms (1) and the limiting mechanism (2) together form a ring structure to allow circumferential support for the flexible sleeve (20). The limiting mechanism (2) is configured to allow movement along the axial direction, so that after the limiting mechanism (2) and the supporting mechanism (1) are separated from each other, the supporting mechanism (1) can move out of the flexible sleeve (20) in a manner that is separated from the flexible sleeve (20), thereby reducing the frictional force on the solid anti-corrosion powder.

2. The device for supporting a flexible sleeve within a pipe according to claim 1, wherein, The support mechanism (1) includes an outer ring (11), an abutment portion (12) connected to the radially inner side of the outer ring (11) and extending along the outer ring (11), the abutment portion (12) and the outer ring (11) together form a boss (13), the limiting mechanism (2) includes a first limiting portion (21), the first limiting portion (21) is disposed between the bosses (13) and abuts against the bosses (13) so that the bosses (13) allow the first limiting portion (21) to move radially inward.

3. The apparatus for supporting a flexible sleeve within a pipe according to claim 2, wherein, The curvature of the radial outer side of the first limiting part (21) is configured to be equivalent to the curvature of the radial outer side of the outer ring, so that the first limiting part (21) and the outer ring (11) are allowed to jointly support the flexible sleeve (20).

4. The apparatus for supporting a flexible sleeve within a pipe according to claim 3, wherein, The surface area of ​​the radially outer side of the first limiting part (21) is set to be smaller than the surface area of ​​the outer ring (11) in order to reduce the friction between the device (100) and the solid anti-corrosion powder when the device (100) moves out of the flexible sleeve (20).

5. The apparatus for supporting a flexible sleeve within a pipe of claim 4, wherein, The abutment (12) is arranged radially inside the outer ring (11) and fixed to the outer ring (11) relative to it, and the abutment (12) extends at the end of the outer ring (11) to form a boss (13) to improve the radially inward force performance of the support mechanism (1).

6. The apparatus for supporting a flexible sleeve within a pipe of claim 5, wherein, The limiting mechanism (2) further includes a second limiting part (22) located radially inside the first limiting part (21) and fixed to the first limiting part (21). The second limiting part (22) is configured to have a curvature comparable to that of the abutting part (12) and allows it to abut against the abutting part (12) to support the abutting part (12).

7. The apparatus for supporting a flexible sleeve within a pipe of claim 1, wherein, The support mechanism (1) includes at least two arc-shaped support parts (14), and the limiting mechanism (2) includes a connecting part (23) disposed between the arc-shaped support parts (14) and allowing the arc-shaped support parts (14) to be connected together, so that the arc-shaped support parts (14) and the connecting part (23) can jointly support the flexible sleeve (20).

8. The apparatus for supporting a flexible sleeve within a pipe of claim 6, wherein, A receiving groove (141) is provided on both sides of each of the arc-shaped support portions (14) along its axial direction, and a connector (231) is provided on both sides of each of the connecting portions (23). The connector (231) is configured to be disposed in the receiving groove (141) to restrict the radial inward movement of the arc-shaped support portion (14) and the connecting portion (23).

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