Roundness correcting device for pipe orifice of polyethylene outer sleeve
By designing a device including a telescopic cylinder, piston rod, cross plate, rounding plate and limiting plate, the problem of time-consuming and labor-intensive rounding of polyethylene outer tubes in the prior art is solved, and a high-efficiency and labor-saving tube rounding effect is achieved.
Patent Information
- Application Number
- CN202520392550.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Existing technologies are time-consuming, labor-intensive, and difficult to efficiently round the ends of deformed polyethylene outer sleeves.
A device comprising a telescopic cylinder, a piston rod, a cross plate, a rounding plate, and a limiting plate is designed. The telescopic cylinder drives the rounding plate to rise in all directions with the assistance of the cross plate and the connecting rod. The limiting plate prevents the device from falling out, thereby achieving rounding of the pipe opening.
This technology enables efficient rounding of the polyethylene outer tube opening, reducing manpower costs and improving rounding efficiency.
Smart Images
Figure CN223890468U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of auxiliary technology for inserting outer tubes, specifically a device for rounding the opening of a polyethylene outer tube. Background Technology
[0002] Polyethylene outer sleeves are protective sleeves for pipes made of high-density polyethylene (HDPE). Made of HDPE, they possess extremely high mechanical strength and excellent corrosion resistance, protecting the pipe from damage caused by external factors during transportation, installation, and use. However, polyethylene outer sleeves are highly susceptible to end deformation due to environmental temperature, storage methods, loading and unloading, and external forces, affecting the subsequent pipe insertion process. Current methods for straightening deformed outer sleeves typically involve using a pry bar to pry open the inner wall of the outer sleeve, flattening the section before slowly inserting the steel pipe into the polyethylene outer sleeve. This process is time-consuming and labor-intensive. Therefore, there is a need to develop a polyethylene outer sleeve end straightening device that can assist in pipe end straightening and reduce labor costs. Utility Model Content
[0003] To address the above technical problems, this utility model provides a polyethylene outer tube end rounding device that can assist in tube end rounding and reduce manpower consumption. This solves the problems of existing methods for rounding deformed outer tubes, which typically involve using a pry bar to pry open the inner wall of the outer tube, prop up the flattened part, and then slowly insert the steel pipe into the polyethylene outer tube, a process that is time-consuming and labor-intensive.
[0004] To solve the above-mentioned technical problems, the present invention provides a polyethylene outer tube end straightening device, comprising a telescopic cylinder, the telescopic cylinder comprising a cylinder body and a piston rod, the piston rod being slidably connected to the cylinder body, a cross plate being sleeved on the piston rod, the cross plate being fixedly connected to the cylinder body, an mounting plate being fixedly connected to the top end of the piston rod, an mounting sleeve being sleeved on the piston rod, one end of the mounting sleeve being fixedly connected to the mounting plate, a straightening plate being hinged to the mounting sleeve via a first connecting rod, the straightening plate being slidably connected to a rectangular groove opened on the cross end of the cross plate via a slider, and one end of the straightening plate being hinged to the mounting plate via a second connecting rod.
[0005] Furthermore, a limiting piece is hinged to the cross end of the cross plate.
[0006] This utility model has the following advantages compared with the prior art:
[0007] This invention uses a telescopic cylinder to drive a straightening plate, which, with the assistance of a cross plate, a first connecting rod, and a second connecting rod, is lifted in all directions to raise the deformed part of the outer tube. The limiting plate hinged to the cross plate can prevent the device from coming out of the outer tube when it is being supported. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of this utility model.
[0009] Figure 2 This is a schematic diagram of the cross-shaped plate structure of this utility model.
[0010] Figure 3 This is a schematic diagram of the straightening plate structure of this utility model.
[0011] In the diagram: 1. Cylinder body, 2. Piston rod, 3. Cross plate, 4. Limiting plate, 5. First connecting rod, 6. Mounting sleeve, 7. Mounting plate, 8. Rounding plate, 9. Second connecting rod, 10. Slider. Detailed Implementation
[0012] The present invention will be further described below with reference to the accompanying drawings.
[0013] like Figure 1 , 2 A polyethylene outer tube end straightening device shown in Figure 3 includes a telescopic cylinder, which includes a cylinder body 1 and a piston rod 2. The piston rod 2 is slidably connected to the cylinder body 1. In order to support the straightening plate 8 against the inner wall of the outer tube, a cross plate 3 is fitted on the piston rod 2. The cross plate 3 is fixedly connected to the cylinder body 1. An installation plate 7 is fixedly connected to the top of the piston rod 2. An installation sleeve 6 is fitted on the piston rod 2. One end of the installation sleeve 6 is fixedly connected to the installation plate 7. The straightening plate 8 is hinged to the installation sleeve 6 through a first connecting rod 5. The straightening plate 8 is slidably connected to the rectangular groove opened on the cross end of the cross plate 3 through a slider 10. In order to improve the stability of the device operation, one end of the straightening plate 8 is hinged to the installation plate 7 through a second connecting rod 9.
[0014] To prevent the device from coming out of the outer tube when it is supported, the cross end of the cross plate 3 is hinged with a limit plate 4.
[0015] The working process of this embodiment is as follows:
[0016] In use, insert one end of the piston rod 2 into the polyethylene outer tube and push it inward until the cross plate 3 contacts the end of the polyethylene outer tube. Then, use a pipe clamp or belt to fix the limiting plate 4 to the outer wall of the polyethylene outer tube. Control the telescopic cylinder to make the piston rod 2 extend into the outer tube. Under the pull of the first connecting rod 5 and the second connecting rod 9, the slider 10 moves away from the center of the cross plate 3. The rounding plate 8 pushes against the inner wall of the outer tube until the shape of the tube opening is restored. Then, retract the telescopic cylinder and remove the pipe clamp that fixes the limiting plate 4 to complete the disassembly.
Claims
1. A device for rounding the end of a polyethylene outer tube, comprising a telescopic cylinder, the telescopic cylinder comprising a cylinder body (1) and a piston rod (2), the piston rod (2) being slidably connected to the cylinder body (1), characterized in that: A cross plate (3) is fitted on the piston rod (2), and the cross plate (3) is fixedly connected to the cylinder (1). A mounting plate (7) is fixedly connected to the top of the piston rod (2). A mounting sleeve (6) is fitted on the piston rod (2), and one end of the mounting sleeve (6) is fixedly connected to the mounting plate (7). A rounding plate (8) is hinged to the mounting sleeve (6) through a first connecting rod (5). The rounding plate (8) is slidably connected to the rectangular groove opened on the cross end of the cross plate (3) through a slider (10). One end of the rounding plate (8) is hinged to the mounting plate (7) through a second connecting rod (9).
2. The polyethylene outer tube end rounding device according to claim 1, characterized in that: The cross plate (3) has a limit plate (4) hinged at the cross end.