Bending device for plastic pipe

Abstract

The utility model relates to a bending device for plastic pipes, which belongs to the technical field of plastic pipe bending and comprises a processing table and a bending mechanism arranged above the processing table and used for bending the plastic pipes, and a conveying structure matched with the bending mechanism is fixed on the upper surface of the processing table. A heating structure for preheating the plastic pipe is mounted on the processing table and the conveying structure; the heating structure comprises a box body fixed on the upper surface of the processing table, a resistance heating wire and a fan which are fixed in the heating box, and an air outlet pipe mounted on the conveying structure; and an air conveying pipeline is arranged between the box body and the air outlet pipe. According to the bending device for the plastic pipe, the plastic pipe becomes soft and is easy to bend through the preheating step, the force and time needed during bending are reduced, hot air can evenly and effectively preheat the plastic pipe through the design of the heating structure, and therefore the bending efficiency is improved, the bending precision is enhanced, and the equipment flexibility is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe bending technology, specifically a bending device for plastic pipes. Background Technology

[0002] Plastic pipes are generally made from synthetic resin, namely polyester, with the addition of stabilizers, lubricants, plasticizers, etc., and are processed by extrusion in a pipe-making machine using the "plastic" method. Plastic pipes are widely used in daily life, mainly as piping for water supply systems, drainage, ventilation and sewage in buildings, underground drainage systems, rainwater pipes, etc. However, in actual installation, the application of plastic pipes is quite complex. Some situations require straight pipes, while others require bent pipes. Currently, there are relatively few types of commonly used bend pipe joints, which cannot meet the needs of actual use. Therefore, in actual installation, workers will manually bend the pipes according to the needs of on-site installation.

[0003] A search revealed that patent document CN215473050U discloses a device for quickly bending plastic pipes, including a bending platform, a bending mechanism for quickly bending plastic pipes on the bending platform, and an anti-collapse component for use with the bending mechanism. The anti-collapse component is inserted inside the plastic pipe. The bending platform is provided with a positioning component and a guide component for use with the bending mechanism. The anti-collapse component includes an elastic rod inserted into the inner cavity of the plastic pipe. The elastic rod is easy to bend. A positioning groove is formed on the outer surface of the elastic rod. A spring is sleeved on the outside of the elastic rod and embedded in the positioning groove.

[0004] The aforementioned patent has the following drawbacks: It provides support and protection for the pipe through the cooperation of a moving and a fixed bending disc, along with the use of a spring and a spring rod. This design may help reduce deformation and breakage of the pipe during bending. However, even with such a design, some materials may still require heating during bending to ensure optimal bending results. This can lead to cracks or breakage if the pipe's plasticity is insufficient or the stress exceeds its bearing capacity. Therefore, a bending device for plastic pipes is proposed to address the aforementioned problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a bending device for plastic pipes, which has the advantages of strong practicality and ease of use, and solves the problem of lack of preheating during pipe bending.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bending device for plastic pipes, comprising a processing table and a bending mechanism disposed above the processing table for bending plastic pipes, wherein a conveying structure for use with the bending mechanism is fixed on the upper surface of the processing table, and a heating structure for preheating the plastic pipes is installed on the processing table and the conveying structure.

[0007] The bending mechanism includes a mounting base disposed above the processing table, a first bending wheel and a second bending wheel, and a docking structure installed between the first bending wheel and the processing table;

[0008] The heating structure includes a box fixed to the upper surface of the processing table, a resistance heating wire and a fan fixed inside the heating box, and an air outlet pipe installed on the conveying structure. An air supply pipe is provided between the box and the air outlet pipe.

[0009] Furthermore, the docking structure consists of a rotating shaft and a plug rod, which are connected by a spline. The rotating shaft is fixed to the processing table, and the top end of the plug rod is fixed to the lower surface of the first bending wheel.

[0010] Furthermore, the mounting base is rotatably mounted on the outer surface of the rotating shaft, and the first bending wheel and the second bending wheel are horizontally arranged.

[0011] Furthermore, a handle and a connecting shaft are respectively installed on the upper and lower sides of the second bending wheel, and a roller is rotatably installed at the bottom end of the connecting shaft, so that the second bending wheel can move around the rotating shaft in a circular motion.

[0012] Furthermore, the processing table has a guide groove inside that is adapted to the roller, and the roller extends into the guide groove and rolls in connection with its inner wall.

[0013] Furthermore, the conveying structure includes a guide seat fixed to the upper surface of the processing table, a mounting table fixed to the side of the guide seat away from the bending mechanism, and two guide wheels detachably mounted on the upper surface of the mounting table. The guide seat has a through hole communicating with the outside.

[0014] Furthermore, the air outlet pipe is fixed to the outer surface of the guide seat, and the air supply pipeline consists of a valve pipe and a connecting pipe. The valve pipe and the connecting pipe are connected by flanges at opposite ends, and their opposite ends are respectively fixedly connected to the housing and the air outlet pipe.

[0015] Compared with the prior art, the present invention provides a bending device for plastic pipes, which has the following advantages:

[0016] 1. The plastic pipe bending device uses a preheating step to make the plastic pipe soft and easy to bend, reducing the force and time required for bending. The heating structure design allows hot air to preheat the plastic pipe evenly and effectively, reducing problems caused by local overheating or underheating, thereby improving bending efficiency, enhancing bending accuracy, and increasing equipment flexibility.

[0017] 2. The plastic pipe bending device has a compact structure and is easy to operate, which helps to improve the working environment and increase the operator's work efficiency. The design of the guide groove and rollers ensures the stability of the second bending wheel during the movement process, further improving the bending accuracy. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the bending mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the conveying structure of this utility model;

[0021] Figure 4 This utility model Figure 2 A magnified structural diagram of structure A is shown.

[0022] In the diagram: 1. Processing table; 11. Guide groove; 2. Bending mechanism; 201. Mounting base; 202. Rotary shaft; 203. Insert rod; 204. First bending wheel; 205. Second bending wheel; 206. Connecting shaft; 207. Handle; 208. Roller; 3. Conveying structure; 301. Guide seat; 302. Through hole; 303. Mounting table; 304. Guide wheel; 4. Heating structure; 401. Box body; 402. Resistance heating wire; 403. Fan; 404. Valve pipe; 405. Air outlet pipe; 406. Connecting pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4A bending device for plastic pipes includes a processing table 1 and a bending mechanism 2 disposed above the processing table 1 for bending plastic pipes. Specifically, the bending mechanism 2 includes a mounting base 201 disposed above the processing table 1, a first bending wheel 204 and a second bending wheel 205, and a docking structure installed between the first bending wheel 204 and the processing table 1. The docking structure consists of a rotating shaft 202 and an insert rod 203, which are splined together. A positioning rod extending into the insert rod 203 is installed inside the rotating shaft 202, allowing the first bending wheel 204 to be detached and installed. The rotating shaft 202 is fixed to the processing table 1, and the top end of the insert rod 203 is fixed to the lower surface of the first bending wheel 204.

[0025] In this embodiment, the mounting base 201 is rotatably mounted on the outer surface of the rotating shaft 202, and the first bending wheel 204 and the second bending wheel 205 are horizontally arranged. A handle 207 and a connecting shaft 206 are respectively mounted on the upper and lower sides of the second bending wheel 205. A roller 208 is rotatably mounted on the bottom end of the connecting shaft 206, and the second bending wheel 205 moves circumferentially around the rotating shaft 202. The lower surface of the second bending wheel 205 is rotatably connected to the top end of the connecting shaft 206. The handle 207 is fixed to the upper surface of the second bending wheel 205. The connecting shaft 206 is fixed and passes through the interior of the mounting base 201.

[0026] To improve bending stability, the processing table 1 has a guide groove 11 that matches the roller 208. The roller 208 extends into the guide groove 11 and rolls in contact with its inner wall. The design of the guide groove 11 and the roller 208 ensures the stability of the second bending wheel 205 during movement, further improving bending accuracy.

[0027] To improve pipe bending efficiency, a conveying structure 3 for use with the bending mechanism 2 is fixed on the upper surface of the processing table 1. The conveying structure 3 includes a guide seat 301 fixed to the upper surface of the processing table 1, a mounting platform 303 fixed to the side of the guide seat 301 away from the bending mechanism 2, and two guide wheels 304 detachably mounted on the upper surface of the mounting platform 303. The guide seat 301 has a through hole 302 communicating with the outside. Through the guide seat 301, mounting platform 303, and two detachably mounted guide wheels 304, a stable and efficient pipe conveying channel is formed. The detachable design of the guide wheels 304 facilitates adjustment and maintenance, ensuring the stability and accuracy of the pipe during conveying. To improve the bending effect, a heating structure 4 for preheating the plastic pipe is installed on the processing table 1 and the conveying structure 3. The heating structure 4 includes a housing 401 fixed to the upper surface of the processing table 1, a resistance heating wire 402 and a fan 403 fixed inside the heating housing 401, and an air outlet pipe 405 installed on the conveying structure 3. An air supply pipe is provided between the housing 401 and the air outlet pipe 405. Specifically, the air outlet pipe 405 is fixed to the outer surface of the guide seat 301, and the air supply pipe consists of a valve pipe 404 and a connecting pipe 406. The valve pipe 404 and the connecting pipe 406 are connected by flanges at opposite ends, and their opposite ends are fixedly connected to the housing 401 and the air outlet pipe 405, respectively.

[0028] It should be noted that the exhaust pipe 405 is ring-shaped, and several annularly arranged exhaust holes are opened on the inner side of the exhaust pipe 405. The combination of the resistance heating wire 402 and the fan 403 ensures that the air inside the heating chamber 401 can be heated evenly and quickly. The circulation effect of the fan 403 promotes the flow of hot air, improves preheating efficiency, and ensures uniform heating of the pipe before bending. The chamber 401 is equipped with a temperature control device, which can preheat as needed.

[0029] The working principle of the above embodiments is as follows:

[0030] In use, the plastic pipe is placed on the conveying structure 3 for conveying. The controller is activated to start the heating structure 4, and the resistance heating wire 402 starts heating. At the same time, the fan 403 is activated to promote the circulation of hot air in the housing 401 and enhance the heating effect. The hot air is delivered to the air outlet pipe 405 through the air supply pipe to preheat the plastic pipe, making it soft and easy to bend. The preheated plastic pipe continues to move along the conveying structure until it reaches between the first bending wheel 204 and the second bending wheel 205. The second bending wheel 205 is connected to the guide groove 11 inside the processing table 1 through the connecting shaft 206 and the roller 208, allowing the second bending wheel 205 to make circular motion around the rotating shaft 202. The operator adjusts the position of the second bending wheel 205 through the handle 207 so that it works in conjunction with the first bending wheel 204 to bend the plastic pipe.

[0031] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bending device for plastic pipes, characterized in that: It includes a processing table and a bending mechanism disposed above the processing table for bending plastic pipes. The upper surface of the processing table is fixed with a conveying structure for use with the bending mechanism. A heating structure for preheating the plastic pipes is installed on the processing table and the conveying structure. The bending mechanism includes a mounting base disposed above the processing table, a first bending wheel and a second bending wheel, and a docking structure installed between the first bending wheel and the processing table; The heating structure includes a box fixed to the upper surface of the processing table, a resistance heating wire and a fan fixed inside the heating box, and an air outlet pipe installed on the conveying structure. An air supply pipe is provided between the box and the air outlet pipe.

2. The bending device for plastic pipes according to claim 1, characterized in that: The docking structure consists of a rotating shaft and a plug rod, which are connected by a spline. The rotating shaft is fixed to the processing table, and the top end of the plug rod is fixed to the lower surface of the first bending wheel.

3. The bending device for plastic pipes according to claim 2, characterized in that: The mounting base is rotatably mounted on the outer surface of the rotating shaft, and the first bending wheel and the second bending wheel are horizontally arranged.

4. A bending device for plastic pipes according to claim 3, characterized in that: The second bending wheel is equipped with a handle and a connecting shaft on its upper and lower sides, respectively. A roller is rotatably mounted on the bottom end of the connecting shaft, and the second bending wheel moves around the rotating shaft in a circular motion.

5. A bending device for plastic pipes according to claim 4, characterized in that: The processing table has a guide groove inside that is adapted to the roller. The roller extends into the guide groove and is in rolling connection with its inner wall.

6. The bending device for plastic pipes according to claim 1, characterized in that: The conveying structure includes a guide seat fixed to the upper surface of the processing table, a mounting table fixed to the side of the guide seat away from the bending mechanism, and two guide wheels detachably mounted on the upper surface of the mounting table. The guide seat has a through hole that communicates with the outside.

7. A bending device for plastic pipes according to claim 6, characterized in that: The air outlet pipe is fixed to the outer surface of the guide seat. The air supply pipeline consists of a valve pipe and a connecting pipe. The valve pipe and the connecting pipe are connected by flanges at opposite ends, and their opposite ends are fixedly connected to the housing and the air outlet pipe, respectively.

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