Plastic pipe section straightening tool

Abstract

A plastic pipe section straightening tool comprises a base and an air cylinder, a telescopic piston rod is arranged at the front end of the air cylinder, the plastic pipe section straightening tool is characterized by further comprising a straightening mechanism, the straightening mechanism comprises a first straightening rod and a second straightening rod which can be connected in an inserted mode, the outer diameter of the first straightening rod and the outer diameter of the second straightening rod are matched with the inner diameter of a pipe body, and the outer diameter of the first straightening rod and the outer diameter of the second straightening rod are matched with the inner diameter of the pipe body. The first straightening rod is installed at the front end of the piston rod, the second straightening rod and the air cylinder are oppositely arranged and arranged at the front end and the rear end of the base respectively, the first straightening rod can be inserted into one end of a pipe body, and the air cylinder drives the first straightening rod and the pipe body to move forwards through the piston rod. And the second straightening rod is inserted into the other end of the pipe body and is inserted into the first straightening rod. The plastic pipe section straightening tool is reasonable in structure and easy to operate, and straightening operation of the plastic pipe section can be completed only through one air cylinder; the straightening mechanism of the plastic pipe section straightening tool is matched with the inner diameter of the pipe body, and the application range of the plastic pipe section straightening tool is wider.

Description

Technical Field

[0001] This utility model relates to the field of pipe manufacturing technology, and in particular to a straightening tool for plastic pipe sections. Background Technology

[0002] Currently, plastic pipes are widely used in various fields. They are manufactured by injection molding machines after the raw materials are heated and melted. The plastic pipes are still hot when they are taken out of the mold, possessing high flexibility. However, as the pipe cools naturally, it shrinks and deforms, causing the pipe to bend and affecting its performance. Therefore, plastic pipes often require straightening after manufacturing to meet installation and usage requirements.

[0003] Existing pipe straightening fixtures, such as the Chinese utility model patent with patent number CN202223136378.3 (authorization announcement number CN218744070U), include a first clamping rod, a second clamping rod, a lower straightening block, and an upper straightening block. The lower straightening block supports the pipe body, and the upper straightening block presses the pipe body downward to perform straightening operations. That is, after clamping both ends of the pipe body with the first and second clamping rods, the lower and upper straightening blocks are adjusted to move along the length of the pipe body to perform straightening operations.

[0004] While the aforementioned pipe straightening fixture can straighten plastic pipes, the diameter of some plastic pipes varies along their length; for example, the diameter is smaller in the middle section and larger at both ends. Therefore, if the fixture is used to straighten such pipes, the upper and lower straightening blocks cannot move along the length of the pipe for straightening. In other words, the upper and lower straightening blocks cannot adapt to the diameter variations, making straightening impossible. Furthermore, the fixture has a complex structure, requiring multiple cylinders for operation, increasing its cost and operational complexity. Therefore, further improvements to the plastic pipe straightening fixture are needed. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a plastic pipe section straightening tool with a reasonable structure and convenient operation, in view of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the plastic pipe section straightening fixture includes a base and a cylinder. The front end of the cylinder is provided with a retractable piston rod. The fixture is characterized by further including a straightening mechanism, which includes a first straightening rod and a second straightening rod that can be inserted into each other. The outer diameter of the first straightening rod and the second straightening rod are adapted to the inner diameter of the pipe body. The first straightening rod is installed at the front end of the piston rod. The second straightening rod and the cylinder are arranged opposite to each other and are respectively located at the front end and the rear end of the base. The first straightening rod can be inserted into one end of the pipe body. The cylinder drives the first straightening rod and the pipe body forward by means of the piston rod, so that the second straightening rod is inserted into the other end of the pipe body and connected with the first straightening rod.

[0007] Furthermore, a floating joint is installed at the front end of the piston rod, and the rear end of the first straightening rod is installed on the head of the floating joint. The floating joint is a flexible connector between the first straightening rod and the piston rod, and the head of the floating joint can move freely within a limited range, thereby preventing the first straightening rod from getting stuck.

[0008] Furthermore, a first mounting plate and a second mounting plate are respectively provided on the front and rear ends of the base. The second straightening rod is fixed on the first mounting plate, and the cylinder is fixed on the second mounting plate. The second straightening rod is fixed to the front end of the base using the first mounting plate, and the cylinder is fixed to the rear end of the base using the second mounting plate, so that the second straightening rod and the cylinder can be arranged opposite each other. The piston rod of the cylinder can easily extend and retract to drive the first straightening rod and the second straightening rod to be inserted or separated. The first mounting plate and the second mounting plate are installed at the front and rear ends of the base, and the distance between them is large, which facilitates the operator to load and unload the tube.

[0009] Furthermore, a limiting plate is provided between the first mounting plate and the second mounting plate, and the limiting plate has a through hole for the first straightening rod to pass through. The through hole in the limiting plate can restrict the movement of the first straightening rod in the front-back direction, preventing the first straightening rod from deviating and thus affecting the straightening effect of the straightening mechanism.

[0010] Furthermore, a pad is provided between the first mounting plate and the limiting plate, the height of which is less than the distance between the tube body and the base. The pad can contact the lower surface of the tube body, thereby ensuring that the tube body can be placed stably during straightening.

[0011] Furthermore, the limiting plate is provided with an upward-opening U-shaped groove, and a cover plate is provided on the U-shaped groove, forming a through hole between the U-shaped groove and the cover plate. The U-shaped groove is continuous in the front-to-back direction, and the cover plate covers the U-shaped groove, so that the U-shaped groove and the cover plate form a through hole for the first straightening rod to pass through, and the diameter of the through hole is larger than the outer diameter of the first straightening rod.

[0012] Furthermore, the front end of the first straightening rod is provided with a plug, and the rear end of the second straightening rod is provided with a corresponding insertion hole. The first straightening rod and the second straightening rod can be inserted into each other through the cooperation of the plug and the insertion hole.

[0013] Furthermore, the outer diameter of the first straightening rod gradually increases from front to back. Some plastic tubes have a smaller inner diameter in the middle and larger diameter at both ends; the outer diameter of the first straightening rod can be adapted to the inner diameter of this tube, making it easier for operators to install or remove the tube from the first straightening rod.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: This plastic pipe section straightening fixture uses a cylinder as a power source to drive the first straightening rod. The pipe body is sleeved on the first straightening rod, and the first straightening rod moves forward under the action of the cylinder, so that the first and second straightening rods pass through the pipe body in a horizontal direction. Furthermore, the first straightening rod can be inserted and fitted with the second straightening rod, that is, the central axis of the first straightening rod is aligned with the central axis of the second straightening rod, thus straightening the bent pipe body and making the bending deformation of the plastic pipe section controllable during the cooling and shrinkage process. Therefore, this plastic pipe section straightening fixture has a reasonable structure and is simple to operate. Only one cylinder is needed to complete the straightening operation of the plastic pipe section, resulting in lower costs and easier pipe handling by operators. Moreover, the straightening mechanism of this plastic pipe section straightening fixture is adapted to the inner diameter of the pipe body, allowing for straightening operations on pipes with different diameters, thus broadening its applicability. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model (the straightening mechanism is in the straightening state);

[0016] Figure 2 for Figure 1 Side view;

[0017] Figure 3 This is a cross-sectional view of an embodiment of the present utility model (the tube is mounted on the first straightening rod, and the straightening mechanism is in the straightening state);

[0018] Figure 4 This is a schematic diagram of the structure of an embodiment of the present utility model (the straightening mechanism is in an unstraightened state);

[0019] Figure 5 This is an exploded view of the limiting plate in an embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-5 The figure shown is the preferred embodiment of this utility model.

[0022] like Figures 1-3 As shown, the plastic pipe section straightening fixture of this embodiment includes a base 1, a cylinder 2, a straightening mechanism 3, a floating joint 4, a first mounting plate 5, a second mounting plate 6, a limiting plate 7, and a pad 8. The cylinder 2, straightening mechanism 3, floating joint 4, first mounting plate 5, second mounting plate 6, limiting plate 7, and pad 8 are all mounted on the base 1. The cylinder 2 serves as the power source for the plastic pipe section straightening fixture. The front end of the cylinder 2 is equipped with a retractable piston rod 21. The straightening mechanism 3 includes a first straightening rod 31 and a second straightening rod 32 that are interlocked. Specifically, the front end of the first straightening rod 31 has an insertion rod 311, and the rear end of the second straightening rod 32 has an insertion hole 321 corresponding to the insertion rod 311. When the insertion rod 311 is inserted into the insertion hole 321, i.e., the central axis of the first straightening rod 31 is aligned with the central axis of the second straightening rod 32, the straightening mechanism 3 is in a straightening state; when the insertion rod 311 is not inserted into the insertion hole 321, the straightening mechanism 3 is in an unstraightened state. Furthermore, in this embodiment, the outer diameters of the first straightening rod 31 and the second straightening rod 32 are adapted to the inner diameter of the tube body 9. The outer diameter of the first straightening rod 31 gradually increases from front to back, that is, the outer diameter of the front end of the first straightening rod 31 is smaller and the outer diameter of the rear end is larger, and the outer diameter of the second straightening rod 32 is larger, so that the straightening mechanism 3 can adapt to the tube body 9 with a smaller outer diameter in the middle section and a larger outer diameter at both ends.

[0023] like Figure 1 As shown, in this embodiment, the base 1 has a first mounting plate 5 and a second mounting plate 6 on its front and rear ends, respectively. The second straightening rod 32 is fixed on the first mounting plate 5, and the cylinder 2 is fixed on the second mounting plate 6, so that the second straightening rod 32 and the cylinder 2 are arranged opposite each other and respectively at the front and rear ends of the base 1. The distance between the first mounting plate 5 and the second mounting plate 6 is relatively large, which facilitates the movement of the first straightening rod 31 and also facilitates the operator to load and unload the tube 9. In addition, the piston rod 21 in this embodiment has a floating joint 4 installed at its front end, and the rear end of the first straightening rod 31 is installed on the head 41 at the front end of the floating joint 4, so that the first straightening rod 31 is also installed at the front end of the piston rod 21. The first straightening rod 31 can move in the front-back direction with the piston rod 21 of the cylinder 2, and the floating joint 4 prevents the first straightening rod 31 from getting stuck.

[0024] like Figures 3-5 As shown, in this embodiment, a limiting plate 7 is provided between the first mounting plate 5 and the second mounting plate 6. The limiting plate 7 has an upward-opening U-shaped groove 71, and a cover plate 72 is provided on the U-shaped groove 71. A through hole is formed between the U-shaped groove 71 and the cover plate 72 for the first straightening rod 31 to pass through, which can prevent the first straightening rod 31 from deviating when moving in the front-back direction. In addition, in this embodiment, a pad 8 is provided between the first mounting plate 5 and the limiting plate 7. The height of the pad 8 is less than the distance between the tube body 9 and the base 1. The pad 8 can contact the lower surface of the tube body 9, thereby ensuring that the tube body 9 can be placed stably during straightening.

[0025] The workflow of this embodiment is as follows:

[0026] A. First, the operator places the pipe body 9 to be straightened onto the first straightening rod 31, that is, the first straightening rod 31 is inserted into one end of the pipe body 9.

[0027] B. Then, cylinder 2, with the help of piston rod 21 and floating joint 4, drives the first straightening rod 31 and tube 9 forward together, so that the second straightening rod 32 is inserted into the other end of tube 9. Next, the insertion rod 311 of the first straightening rod 31 is inserted into the insertion hole 321 of the second straightening rod 32, that is, the central axis of the first straightening rod 31 is aligned with the central axis of the second straightening rod 32, thus straightening the tube 9 to be straightened. Figure 3 As shown, this completes the straightening operation of the plastic pipe section straightening fixture;

[0028] C. Finally, cylinder 2, with the help of piston rod 21 and floating joint 4, moves the first straightening rod 31 and tube 9 backward together, causing the second straightening rod 32 to move out of the tube 9. The operator then removes the straightened tube 9 from the first straightening rod 31. Figure 4 As shown.

Claims

1. A straightening fixture for plastic pipe sections, comprising a base (1) and a cylinder (2), wherein the front end of the cylinder (2) is provided with a retractable piston rod (21), characterized in that: It also includes a straightening mechanism (3), which includes a first straightening rod (31) and a second straightening rod (32) that can be plugged into each other. The outer diameter of the first straightening rod (31) and the second straightening rod (32) is adapted to the inner diameter of the tube body (9). The first straightening rod (31) is installed at the front end of the piston rod (21). The second straightening rod (32) and the cylinder (2) are arranged opposite to each other and are respectively arranged at the front end and the rear end of the base (1). The first straightening rod (31) can be inserted into one end of the tube body (9). The cylinder (2) drives the first straightening rod (31) and the tube body (9) to move forward by means of the piston rod (21), so that the second straightening rod (32) is inserted into the other end of the tube body (9) and plugged into the first straightening rod (31).

2. The plastic pipe section straightening fixture according to claim 1, characterized in that: The piston rod (21) is equipped with a floating joint (4) at its front end, and the rear end of the first straightening rod (31) is mounted on the head (41) at the front end of the floating joint (4).

3. The plastic pipe section straightening fixture according to claim 1, characterized in that: The base (1) has a first mounting plate (5) and a second mounting plate (6) on its front and rear ends, respectively. The second straightening rod (32) is fixed on the first mounting plate (5), and the cylinder (2) is fixed on the second mounting plate (6).

4. The plastic pipe section straightening fixture according to claim 3, characterized in that: A limiting plate (7) is provided between the first mounting plate (5) and the second mounting plate (6), and the limiting plate (7) is provided with a through hole for the first straightening rod (31) to pass through.

5. The plastic pipe section straightening fixture according to claim 4, characterized in that: A pad (8) is provided between the first mounting plate (5) and the limiting plate (7), and the height of the pad (8) is less than the distance between the tube body (9) and the base (1).

6. The plastic pipe section straightening fixture according to claim 4, characterized in that: The limiting plate (7) is provided with an upward-opening U-shaped groove (71), and a cover plate (72) is provided on the U-shaped groove (71). A through hole is formed between the U-shaped groove (71) and the cover plate (72).

7. The plastic pipe section straightening fixture according to any one of claims 1 to 6, characterized in that: The first straightening rod (31) has a plug (311) at its front end, and the second straightening rod (32) has a plug hole (321) at its rear end that corresponds to the plug (311).

8. The plastic pipe section straightening fixture according to claim 1, characterized in that: The outer diameter of the first straightening rod (31) gradually increases from front to back.

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