A heating and expanding device for PE pipe production

Abstract

A kind of PE pipe production heating expansion device, including expansion shell, the outside of the expansion shell is sleeved with first expansion ring, the outside of the first expansion ring is sleeved with second expansion ring, the rear of the expansion shell is threadedly installed with bolt, the bolt is blocked in the rear of first expansion ring, second expansion ring, the lower end of the bolt is fixedly connected with knob.The expansion shell includes shell body, the rear of the shell body is fixedly connected with threaded sleeve, so that bolt avoids second expansion ring, so that second expansion ring can slide along the outside of first expansion ring, so that first expansion ring expands target pipe, continue to screw bolt inwards, so that bolt avoids first expansion ring, so that expansion shell expands target pipe, adjust first expansion ring, second expansion ring as required, match the inner diameter that needs to be expanded, after heating target PE pipe, device is inserted into interior, corresponding pipe inner diameter is matched by adjusting bolt.

Description

Technical Field

[0001] This utility model belongs to the technical field of PE pipe production equipment, and in particular relates to a heating expansion device for PE pipe production. Background Technology

[0002] PE pipe heating expansion is a pipe connection and repair process based on the thermoplastic properties of polyethylene. It involves locally heating the PE pipe to 180℃-220℃ to soften it, then applying a precise pressure of 0.1MPa-0.3MPa to expand the pipe. Finally, it is fixed in shape by air cooling or water cooling. This achieves a tight connection with pipe fittings, trenchless repair of damaged pipes, or transition between different pipe diameters. The entire process requires strict control of temperature, pressure, and cooling rate to ensure pipe strength and sealing. It is commonly used in small-diameter connections, medium and large-diameter repairs, and pipeline maintenance in complex terrain scenarios.

[0003] Since the outer diameter of the core used for conventional expansion is fixed, directly increasing the outer diameter will cause its length to increase continuously, and its working path will also need to be adjusted as needed, resulting in the relatively low practicality of the core used for conventional expansion.

[0004] To address this issue, we propose a heating expansion device for PE pipe production. Utility Model Content

[0005] The purpose of this invention is to solve the problem of the low practicality of conventional expansion cores, and to propose a heating expansion device for PE pipe production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A heating and expansion device for PE pipe production includes an expansion shell. A first expansion ring is slidably fitted onto the outside of the expansion shell, and a second expansion ring is slidably fitted onto the outside of the first expansion ring. A bolt is threaded onto the rear of the expansion shell, and the bolt is positioned behind the first and second expansion rings. A knob is fixedly connected to the lower end of the bolt. Turning the knob acts on the bolt, moving it inward toward the second expansion ring, allowing the bolt to avoid the second expansion ring and enabling the second expansion ring to slide along the outside of the first expansion ring. This allows the first expansion ring to expand the target pipe. Further inward tightening of the bolt, moving it away from the first expansion ring, further expands the target pipe. The first and second expansion rings can be adjusted as needed to match the required inner diameter for expansion. After heating the target PE pipe, the device is inserted. Adjusting the bolt allows for easy matching to the corresponding pipe inner diameter.

[0007] Preferably, the expansion shell includes a housing, a threaded sleeve fixedly connected to the rear of the housing, and a first slider fixedly connected to the outside of the housing. The bolt is threadedly installed inside the threaded sleeve. The first slider limits the sliding range of the first expansion ring, and the threaded sleeve guides the bolt thread.

[0008] Preferably, the expansion shell further includes a mounting rod, which is fixedly connected inside the shell. The mounting rod is used to connect external control equipment.

[0009] Preferably, the expansion shell further includes a reinforcing plate, which is fixedly connected between the shell and the mounting rod. The reinforcing plate increases the stability between the mounting rod and the shell.

[0010] Preferably, the first expansion ring includes a first ring body, the interior of which is provided with a first groove, and the first slider is slidably mounted within the first groove. A second slider is fixedly connected to the exterior of the first ring body. The second slider guides the second expansion ring to slide, and the first slider guides the first groove to slide.

[0011] Preferably, the second expansion ring includes a second ring body, the interior of which is provided with a second groove, and the second slider is slidably mounted within the second groove. The second slider guides the second groove to slide, preventing the second expansion ring from falling off.

[0012] In summary, the technical effects and advantages of this utility model are as follows: Tighten the knob to apply force to the bolt, moving it towards the inside of the second expansion ring so that the bolt avoids the second expansion ring, allowing the second expansion ring to slide along the outside of the first expansion ring. This causes the first expansion ring to expand the target pipe. Continue to tighten the bolt inward, moving it away from the first expansion ring, causing the expansion shell to expand the target pipe. Adjust the first and second expansion rings as needed to match the required inner diameter. After heating the target PE pipe, insert the device inside. Adjusting the bolt allows for easy matching to the corresponding pipe inner diameter. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the expanded shell structure of this utility model; Figure 3 This is a schematic diagram of the first expansion ring structure of this utility model; Figure 4 This is a schematic diagram of the second expansion ring structure of this utility model.

[0014] In the diagram: 1. Bolt; 2. Expansion shell; 3. First expansion ring; 4. Second expansion ring; 5. Knob; 21. Housing; 22. First slider; 23. Threaded sleeve; 24. Reinforcing plate; 25. Mounting rod; 31. First ring body; 32. First slide groove; 33. Second slider; 41. Second ring body; 42. Second slide groove. Detailed Implementation

[0015] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.

[0016] like Figure 1 As shown, a heating expansion device for PE pipe production includes an expansion shell 2. A first expansion ring 3 is slidably fitted onto the outside of the expansion shell 2, and a second expansion ring 4 is slidably fitted onto the outside of the first expansion ring 3. A bolt 1 is threaded onto the rear of the expansion shell 2, and the bolt 1 is positioned behind the first expansion ring 3 and the second expansion ring 4. A knob 5 is fixedly connected to the lower end of the bolt 1. Turning the knob 5 acts on the bolt 1, moving it inward toward the second expansion ring 4, allowing the bolt 1 to avoid the second expansion ring 4 and enabling the second expansion ring 4 to slide outward along the first expansion ring 3, thus expanding the target pipe. Continuing to tighten the bolt 1 inward further expands the expansion shell 2, causing it to avoid the first expansion ring 3. The first expansion ring 3 and the second expansion ring 4 can be adjusted as needed to match the required inner diameter for expansion. After heating the target PE pipe, the device can be inserted into the shell.

[0017] like Figure 1 and 2 As shown, the expansion shell 2 includes a shell 21, a threaded sleeve 23 fixedly connected to the rear of the shell 21, a first slider 22 fixedly connected to the outside of the shell 21, and a bolt 1 threadedly installed inside the threaded sleeve 23. The first slider 22 is used to limit the sliding range of the first expansion ring 3, and the threaded sleeve 23 is used to guide the bolt 1 threadedly.

[0018] like Figure 1 and 2 As shown, the expansion shell 2 also includes a mounting rod 25, which is fixedly connected to the inside of the shell 21. External control equipment is connected via the mounting rod 25.

[0019] like Figure 1 and 2 As shown, the expansion shell 2 also includes a reinforcing plate 24, which is fixedly connected between the shell 21 and the mounting rod 25. The reinforcing plate 24 increases the stability between the mounting rod 25 and the shell 21.

[0020] like Figure 1 , 2As shown in Figure 3, the first expansion ring 3 includes a first ring body 31, with a first groove 32 formed inside the first ring body 31. A first slider 22 is slidably installed in the first groove 32, and a second slider 33 is fixedly connected to the outside of the first ring body 31. The second expansion ring 4 is guided to slide by the second slider 33, and the first groove 32 is guided to slide by the first slider 22.

[0021] like Figure 1 , 3 As shown in Figure 4, the second expansion ring 4 includes a second ring body 41, and a second groove 42 is formed inside the second ring body 41. The second slider 33 is slidably installed in the second groove 42. The second slider 33 guides the second groove 42 to slide, preventing the second expansion ring 4 from falling off.

[0022] Working principle: Turning knob 5 acts on bolt 1, moving bolt 1 towards the inside of the second expansion ring 4, so that bolt 1 avoids the second expansion ring 4, allowing the second expansion ring 4 to slide along the outside of the first expansion ring 3, causing the first expansion ring 3 to expand the target pipe. Continue to turn bolt 1 inward, so that bolt 1 avoids the first expansion ring 3, causing the expansion shell 2 to expand the target pipe. Adjust the first expansion ring 3 and the second expansion ring 4 as needed to match the required inner diameter for expansion. After heating the target PE pipe, insert the device inside.

[0023] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.

[0024] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.

Claims

1. A heating expansion device for PE pipe production, characterized in that: Includes an expansion shell (2), the outer side of which is fitted with a first expansion ring (3), the outer side of which is fitted with a second expansion ring (4), the rear part of the expansion shell (2) is threaded with a bolt (1), the bolt (1) is blocked at the rear of the first expansion ring (3) and the second expansion ring (4), and the lower end of the bolt (1) is fixedly connected with a knob (5).

2. The heating and expansion device for PE pipe production according to claim 1, characterized in that: The expansion shell (2) includes a shell (21), a threaded sleeve (23) is fixedly connected to the rear of the shell (21), a first slider (22) is fixedly connected to the outside of the shell (21), and the bolt (1) is threadedly installed in the threaded sleeve (23).

3. The heating and expansion device for PE pipe production according to claim 2, characterized in that: The expansion shell (2) also includes a mounting rod (25), which is fixedly connected to the inside of the shell (21).

4. The heating and expansion device for PE pipe production according to claim 3, characterized in that: The expansion shell (2) also includes a reinforcing plate (24), which is fixedly connected between the shell (21) and the mounting rod (25).

5. A heating expansion device for PE pipe production according to claim 2, characterized in that: The first expansion ring (3) includes a first ring body (31), a first groove (32) is provided inside the first ring body (31), the first slider (22) is slidably installed in the first groove (32), and a second slider (33) is fixedly connected to the outside of the first ring body (31).

6. A heating expansion device for PE pipe production according to claim 5, characterized in that: The second expansion ring (4) includes a second ring body (41), and a second groove (42) is provided inside the second ring body (41). The second slider (33) is slidably installed in the second groove (42).

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