A liner expander

Abstract

The utility model discloses a kind of inner liner pipe expander, including rotating rod, rotating rod is equipped with connecting section, first end and second end, connecting section is located between first end and second end;Connecting section is provided with first thread structure;Movable sleeve, movable sleeve is provided with second thread structure, movable sleeve is sleeved in connecting section, to make second thread structure and first thread structure thread cooperation;Supporting ring, supporting ring is rotatably connected to rotating rod;Open component, including multiple open mechanism;Open mechanism includes open lever and linkage rod, one end of linkage rod is hinged in movable sleeve, the other end of linkage rod is hinged in open lever, one end of open lever is hinged in supporting ring, the other end of open lever is formed as pipe expanding end.The utility model can be directly moved up and down by rotating rotating rod with thread structure to guide movable sleeve, realize the pipe expanding action of the pipe expanding end of multiple open mechanism, it is convenient to operate, and pipe expanding contact surface is relatively uniform.

Description

Technical Field

[0001] This utility model relates to the field of pipeline maintenance technology, and in particular to an inner lining tube expander. Background Technology

[0002] Currently, in piping systems, tube expanders are widely used devices for pipe expansion joints. Through the expansion action of tube expanders, a tight connection is formed between the pipe and the tube sheet or other pipe fittings.

[0003] When repairing the inner lining of a pipeline, the steel billet material to be repaired needs to be transferred to a designated position on the inner wall of the pipeline. Then, the expander is placed into the pipeline to expand the steel billet material, causing the inner lining steel billet to be pushed outward and thus fit the pipeline to be repaired.

[0004] In related technologies, when repairing the inner lining of pipe expansion tubes, different pipe diameters require different expansion tubes, resulting in a low compatibility rate. Furthermore, during the expansion process, uneven force is applied to the inner wall of the pipe, making the expansion process prone to jamming, damaging the inner wall, and resulting in an uneven repair surface. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide an inner lining tube expander, which can directly guide the movable sleeve to move up and down through a threaded structure by rotating the rotating rod, so as to realize the tube expansion action of the tube expansion end of multiple expansion mechanisms. It is easy to operate and the tube expansion contact surface is relatively uniform.

[0006] The objective of this utility model is achieved through the following technical solution: An inner liner expander, comprising, A rotating rod is provided with a connecting section, a first end, and a second end. The first end and the second end are located at opposite ends of the rotating rod, and the connecting section is located between the first end and the second end. The connecting section is provided with a first threaded structure. A movable sleeve is provided with a second threaded structure. The movable sleeve is fitted onto the outside of the connecting section so that the second threaded structure is threadedly engaged with the first threaded structure. A supporting ring, which is rotatably connected to a rotating rod; The spreading assembly includes multiple spreading mechanisms, which are spaced apart in the circumferential direction of the supporting ring. Each spreading mechanism includes a spreading rod and a linkage rod. One end of the linkage rod is hinged to the movable sleeve, and the other end of the linkage rod is hinged to the spreading rod. One end of the spreading rod is hinged to the supporting ring, and the other end of the spreading rod is formed as an expansion tube end.

[0007] Furthermore, the expansion tube end is provided with an expansion tube wheel, which is rotatably mounted on the expansion tube end.

[0008] Furthermore, the supporting ring is rotatably engaged with the first end via a bearing.

[0009] Furthermore, the first end is provided with a first connection structure.

[0010] Furthermore, the first connecting structure includes a first connecting post protruding from the first end face, and the transverse cross-section of the first connecting post is hexagonal.

[0011] Furthermore, the second end is provided with a second connection structure.

[0012] Furthermore, the second connecting structure includes a second connecting post protruding from the second end face, and the transverse cross-section of the second connecting post is hexagonal.

[0013] Furthermore, two movable sleeves are provided, both of which are fitted onto the outside of the connecting section and are spaced apart along the axial direction of the rotating rod; two sets of the first threaded structures are provided on the outside of the connecting section; the supporting ring is rotatably connected to the outside of the connecting section and is located between the two sets of the first threaded structures; the spreading assembly includes two, and the multiple spreading mechanisms of the two spreading assemblies are respectively linked to the two movable sleeves.

[0014] Compared with the prior art, the advantages of this utility model are as follows: the movable sleeve can be moved up and down by rotating the rotating rod with the help of an electric wrench or by manual operation, so as to perform the expansion or retraction action of the multiple opening mechanisms of the linkage component. The operation is convenient, which can meet the requirements of timely pipeline repair and improve repair efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the structure of the opening component, the movable sleeve, and the supporting ring of this utility model; Figure 4 This is a schematic diagram of the opening mechanism of this utility model.

[0016] In the figure: 10, rotating rod; 11, connecting section; 12, first threaded structure; 13, first connecting post; 14, second connecting post; 20, movable sleeve; 30, supporting ring; 40, spreading mechanism; 41, linkage rod; 42, spreading rod; 421, expansion tube end; 422, expansion tube wheel. Detailed Implementation

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0019] like Figures 1-4 The illustrated inner liner expander includes a rotating rod 10, a movable sleeve 20, a supporting ring 30, and an expansion assembly. The rotating rod 10 has a connecting section 11, a first end, and a second end, located at opposite ends of the rotating rod 10. The connecting section 11 is positioned between the first and second ends. Specifically, the connecting section 11 has a first threaded structure 12, and the movable sleeve 20 has a corresponding second threaded structure. The movable sleeve 20 is fitted over the connecting section 11 so that the second threaded structure and the first threaded structure 12 are threadedly engaged. Furthermore, the supporting ring 30 is rotatably connected to the rotating rod 10.

[0020] The spreading assembly includes multiple spreading mechanisms 40, which are spaced apart in the circumferential direction of the supporting ring 30. Each spreading mechanism 40 includes a spreading rod 42 and a linkage rod 41. One end of the linkage rod 41 is hinged to the movable sleeve 20, and the other end of the linkage rod 41 is hinged to the spreading rod 42. One end of the spreading rod 42 is hinged to the supporting ring 30, and the other end of the spreading rod 42 is formed as an expansion tube end 421.

[0021] Based on the above structure, when using the inner lining expander of this utility model, When repairing the pipe lining, after the lining steel billet is transported to the designated position inside the pipe, the tube expander is placed inside the pipe and located inside the lining steel billet. An electric wrench or other tools are used to apply force to the first end of the rotating rod 10, causing the rotating rod 10 to rotate. As the rotating rod 10 rotates, the first threaded structure 12 of the connecting section 11 of the rotating rod 10 rotates, which in turn drives the movable sleeve 20, which is engaged with it through the second threaded structure, to rotate. The rotational movement of the movable sleeve 20 is restricted by multiple opening mechanisms 40. During the threaded rotation engagement, the movable sleeve 20 can be guided to move up and down, which in turn drives the linkage rod 41 connected to it to rotate up and down. One end of the opening rod 42 is rotatably connected to the support ring 30. Therefore, the up and down rotation of the linkage rod 41 can drive the up and down rotation of the opening rod 42 connected to it. During repair, the tube expander end 421 of the opening rod 42 rotates downward to push the lining steel billet outward, thereby fitting it to the pipe to be repaired.

[0022] After the expansion end 421 is repaired by moving up and down, the inner lining steel billet can be evenly attached to the inner wall of the pipe. After achieving the expected effect, the movable sleeve 20 can be moved upward continuously to pull the linkage rod 41 to rotate upward, thereby linking the expansion end 421 of the support rod 42 to retract upward, and the expansion device can be removed from the pipe.

[0023] In this way, the movable sleeve 20 can be moved up and down by rotating the rotating rod 10 with the help of an electric wrench or by manual operation. This will cause the multiple opening mechanisms 40 of the opening assembly to perform the expansion or retraction action. The operation is convenient and can meet the requirements of timely pipeline repair and improve repair efficiency.

[0024] Furthermore, the expansion end 421 is provided with an expansion wheel 422, which is rotatably mounted on the expansion end 421. In this way, when the expansion action is performed, the expansion end 421 of the support rod 42 is fitted with the inner lining steel billet of the pipe by the rolling contact of the expansion wheel 422. This can reduce the jamming during the repair process, and the repair surface is more uniform by rolling and fitting the repair with the wheel surface.

[0025] Of course, the aforementioned tube expander 422 can be implemented using existing structures such as rollers or balls.

[0026] Furthermore, the support ring 30 is rotatably engaged with the first end via a bearing. Thus, when the rotating rod 10 rotates, the support ring 30 rotates with the rotating rod 10 via the bearing. Specifically, the rotating rod 10 is connected to the inner ring of the bearing, while the support ring 30 is connected to the outer ring of the bearing. In this way, the rotation of the rotating rod 10 is caused by the bearing balls rotating relative to the support ring 30, without causing the support ring 30 to rotate. The rotation of the rotating rod 10 is smooth, and the support ring 30 can also remain stationary as the linkage basis for the spreading rod 42, preventing the spreading rod 42 from rotating due to the rotation of the support ring 30, which could lead to repair jamming.

[0027] Furthermore, the first end is provided with a first connecting structure, which can be used to connect with external wrenches, screwdrivers, or motor heads.

[0028] Specifically, the first connecting structure includes a first connecting post 13 protruding from the first end face. The transverse cross-section of the first connecting post 13 is hexagonal, so that when a wrench is selected, the wrench can be clamped on the flat surface of the hexagon for rotation operation, and it is not easy for slippage to occur.

[0029] Furthermore, a second connecting structure can also be provided at the second end. Similarly, the second connecting structure can be used to connect with external wrenches, screwdrivers, or motor heads. Connecting structures are provided at both ends of the rotating rod 10, allowing rotation at both ends of the rotating rod 10, enabling the tube expander to expand the tube without separating the ends.

[0030] Furthermore, the second connecting structure includes a second connecting post 14 protruding from the second end face, and the transverse cross-section of the second connecting post 14 is hexagonal. This allows the wrench to be gripped on the flat hexagonal surface for rotation when selected, reducing the likelihood of slippage.

[0031] Of course, the first and second connection structures mentioned above can also be structures such as spline heads or threaded connectors that can be directly keyed or threaded to the motor shaft, so that the motor shaft can be directly connected and rotated.

[0032] Further, see Figure 2 There are two movable sleeves 20. Both movable sleeves 20 are fitted onto the outside of the connecting section 11. The two movable sleeves 20 are spaced apart along the axial direction of the rotating rod 10. The connecting section 11 is provided with two sets of first thread structures 12. That is, movable sleeves 20 are provided above and below the rotating rod 10 for threaded assembly with the rotating rod 10.

[0033] Based on this structure, the aforementioned support ring 30 is rotatably connected to the outside of the connecting section 11 and is located between the two sets of first threaded structures 12; the expansion assembly includes two, and the multiple expansion mechanisms 40 of the two expansion assemblies are linked to the two movable sleeves 20 respectively.

[0034] In this way, during the tube expansion repair operation, the same rotating rod 10 rotates, and the upper and lower movable sleeves 20 can guide the multiple expansion mechanisms 40 of the upper and lower expansion components to expand and repair the tube. Repair can be carried out simultaneously inside the pipe, resulting in high repair efficiency. At the same time, the expansion rods 42 of the multiple upper and lower expansion mechanisms 40 are all connected to the assembly base by the support ring 30 in the middle position, which simplifies the assembly structure.

[0035] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A tube expander with an inner lining, characterized in that, include, A rotating rod is provided with a connecting section, a first end, and a second end. The first end and the second end are located at opposite ends of the rotating rod, and the connecting section is located between the first end and the second end. The connecting section is provided with a first threaded structure. A movable sleeve is provided with a second threaded structure. The movable sleeve is fitted onto the outside of the connecting section so that the second threaded structure is threadedly engaged with the first threaded structure. A supporting ring, which is rotatably connected to a rotating rod; The spreading assembly includes multiple spreading mechanisms, which are spaced apart in the circumferential direction of the supporting ring. Each spreading mechanism includes a spreading rod and a linkage rod. One end of the linkage rod is hinged to the movable sleeve, and the other end of the linkage rod is hinged to the spreading rod. One end of the spreading rod is hinged to the supporting ring, and the other end of the spreading rod is formed as an expansion tube end.

2. The inner lining expander according to claim 1, characterized in that, The expansion tube end is provided with an expansion tube wheel, which is rotatably mounted on the expansion tube end.

3. The inner lining expander according to claim 1, characterized in that, The supporting ring is rotatably engaged with the first end via a bearing.

4. The inner lining expander according to claim 1, characterized in that, The first end is provided with a first connection structure.

5. The inner lining expander according to claim 4, characterized in that, The first connecting structure includes a first connecting post protruding from the first end face, and the transverse cross-section of the first connecting post is hexagonal.

6. The inner lining expander according to claim 4, characterized in that, The second end is provided with a second connection structure.

7. The inner lining expander according to claim 6, characterized in that, The second connection structure includes a second connecting post protruding from the second end face, and the transverse cross-section of the second connecting post is hexagonal.

8. The inner liner expander according to any one of claims 1-7, characterized in that, Two movable sleeves are provided, both of which are fitted onto the outside of the connecting section and are spaced apart along the axial direction of the rotating rod; two sets of the first threaded structures are provided on the outside of the connecting section; the supporting ring is rotatably connected to the outside of the connecting section and is located between the two sets of the first threaded structures; two spreading assemblies are provided, and the multiple spreading mechanisms of the two spreading assemblies are linked to the two movable sleeves respectively.

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