Irregular pipe fitting processing equipment

Abstract

This invention relates to the field of pipe fitting processing equipment technology, and discloses a special-shaped pipe fitting processing equipment, including a first fixed pipe, a second fixed pipe, and a moving guide rail. Both ends of a plastic pipe are fixed to the first and second fixed pipes respectively. The second fixed pipe is disposed on the moving guide rail. After heating, the plastic pipe is bent by sliding the second fixed pipe on the moving guide rail. The first fixed pipe is connected to a fixed end, the fixed end is fixed in position, and an elastic support is provided on the fixed end. When the plastic pipe is fixed, the support is inserted into the pipe. During the bending process, as the bending angle increases, the support on the inner side of the bend becomes tighter, and the support force is concentrated. Through the supporting effect of the support, pipe deformation is avoided. At the same time, different support methods are provided according to the different bending sides of the pipe fitting, resulting in better shape and forming quality, and reducing the generation of defective products.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting processing equipment technology, specifically to a processing equipment for irregularly shaped pipe fittings. Background Technology

[0002] The irregular pipe fitting processing equipment is a specialized device for manufacturing pipe fittings with special structures and shapes. In modern industrial fields, especially in chemical, petroleum, natural gas, papermaking, and thermal power industries, traditional standard pipe fittings often cannot meet actual production needs due to the complexity of pipeline systems and limitations imposed by factors such as inlet and outlet pipelines and equipment connections. Therefore, the irregular pipe fitting processing equipment has emerged to provide an effective solution to these irregular problems. The core of the irregular pipe fitting processing equipment lies in its highly customized processing capabilities. This equipment can produce pipe fittings with specific shapes, sizes, and structures according to the user's specific requirements through precise design and manufacturing. These irregular pipe fittings include, but are not limited to, elbows, tees, crosses, concentric reducers, eccentric reducers, necked pipes, and socket-type combination pipe fittings, among others. Each type of irregular pipe fitting has its unique application scenarios and advantages, capable of meeting the special requirements of different industries and different pipeline systems. During the operation of the irregular pipe fitting processing equipment, precise control is crucial. Advanced manufacturing technology plays a crucial role in ensuring the precision and quality of shaped pipe fittings by precisely controlling process parameters such as cutting, bending, and forming. Simultaneously, utilizing advanced CNC technology and automation systems, the shaped pipe fitting processing equipment achieves efficient and stable production, improving production efficiency and reducing costs. Furthermore, the equipment prioritizes environmental protection and safety, employing environmentally friendly materials and processes to minimize environmental impact. It is also equipped with comprehensive safety protection measures to ensure the safety and health of operators. This shaped pipe fitting processing equipment is a highly efficient, precise, and reliable device that meets the demands of modern industry for shaped pipe fittings. Its application enables flexible connection and conversion of pipeline systems, solving irregular shape problems and ensuring the normal operation of pipeline systems. With continuous technological advancements and industrial development, the shaped pipe fitting processing equipment will continue to play a vital role, providing strong support for industrial production and pipeline system optimization.

[0003] In the installation of larger plastic water pipes, when non-90-degree corner connectors are required, the pipes need to be bent. During the heating and bending process, the bent portion of the plastic pipe may deform due to stress. This deformation causes a change in the pipe diameter at the corner. If the inner diameter of the plastic pipe at the corner decreases, the fluid velocity increases as it passes through this area, creating localized high pressure and velocity changes. This can lead to a series of problems: First, it increases the impact force of the fluid on the pipe wall, leading to accelerated wear on the inner wall of the pipe and shortening its service life. Second, the velocity change may cause particulate matter to deposit in the fluid, gradually forming blockages and affecting the flow performance of the pipe. Third, the reduced diameter at the corner may also cause turbulence, increasing energy loss and reducing the efficiency of the entire system. On the other hand, if the inner diameter of the plastic pipe at the corner increases, it will also bring some problems. First, the increased diameter may reduce the pressure-bearing capacity of the pipe in this area, because the pipe wall thickness and support structure may not be sufficient to withstand external pressure or internal fluid pressure, increasing the risk of pipe rupture or deformation under high pressure. Secondly, an increase in diameter may cause "pockets" or "recesses" to form at the corners of the pipe fittings. These areas are prone to accumulating impurities and dirt in the fluid, making them difficult to clean and maintain. Over time, this may lead to corrosion or pollution problems. Therefore, it is necessary to control the bending points during the pipe fitting process to avoid changes in pipe diameter. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the existing technology, the present invention provides a special-shaped pipe processing device, which has the advantage of keeping the shape and inner diameter of the pipe bending point unchanged, and solves the problem of deformation caused by stress during the bending process of the pipe.

[0005] (II) Technical Solution: To achieve the above-mentioned purpose of keeping the shape and inner diameter of the pipe fitting unchanged at the bend, the present invention provides the following technical solution: a special-shaped pipe fitting processing device, including a first fixed pipe, a second fixed pipe and a moving guide rail. The two ends of the plastic pipe are respectively fixed on the first fixed pipe and the second fixed pipe. The second fixed pipe is set on the moving guide rail. After heating, the plastic pipe is bent by sliding the second fixed pipe on the moving guide rail. The first fixed pipe is connected to the fixed end. The fixed end is fixed in position and is provided with an elastic support. When the plastic pipe is fixed, the support is inserted into the pipe. During the bending process of the plastic pipe, as the bending angle increases, the support on the inner side of the bend becomes tighter and the support force is concentrated.

[0006] Preferably, the support is an airbag, which is fixed to a fixed end and inflated by an air outlet on the fixed end. The airbag has a threaded retaining ring at the bend of the plastic tube. During the bending process of the plastic tube, the spacing between the rings on the inner side of the bend decreases, making the support tighter.

[0007] Preferably, the airbag has an airbag deflation port at one end of the second fixing tube, and an infrared detector is provided on the outward-facing side of the second fixing tube. The infrared detector can detect the horizontal movement distance of the airbag deflation port on the airbag and control the opening and closing of the airbag deflation port.

[0008] Preferably, the support is a bending spring, which consists of an elastic shaft and threaded spring sheets surrounding the elastic shaft. During the bending process of the plastic tube, the spacing between the spring sheets on the inner side of the bend decreases, making the support tighter.

[0009] Preferably, the fixed end is provided with an air outlet, which can blow air into the plastic tube and is guided by the spring on the bending spring, so that the air flows around the tube wall.

[0010] Preferably, the surface of the reed is provided with a recessed texture along the spiral direction. The recessed texture increases the contact area with the hot airflow and guides the airflow, thereby reducing the generation of turbulence and optimizing the internal gas flow.

[0011] Preferably, the first and second fixed tubes are equipped with infrared lasers that can emit infrared light. A detection plate is provided on the outside of the plastic tube bend, and the light emitted by the two infrared lasers can converge on the detection plate. When the bending angle of the plastic tube is determined, the tilt angle of the detection plate will also be adjusted. When the light spots formed by the infrared lasers at both ends on the detection plate coincide, it indicates that the plastic tube has been bent in place. Heating and further bending are stopped, and the plastic tube is removed after cooling.

[0012] (III) Beneficial Effects: Compared with the prior art, the present invention provides a special-shaped pipe fitting processing device, which has the following beneficial effects: 1. This irregularly shaped pipe processing device features an elastic support at its fixed end. When the plastic pipe is fixed, the support is inserted into the pipe. During bending, as the bending angle increases, the support on the inner side of the bend becomes tighter, concentrating the support force. During bending, the inner side of the plastic pipe experiences compressive stress, while the outer side experiences tensile stress. By adjusting the tightness of the support on the inner and outer sides, these stresses can be effectively balanced. Tighter support reduces compressive deformation on the inner side, while appropriate support on the outer side helps resist tensile stress, thereby reducing the risk of material breakage during bending. Simultaneously, the support utilizes the support structure to support the inner wall of the pipe. This method effectively avoids deformation caused by stress at bends and ensures that the inner diameter of the pipe wall remains unchanged at bends, preventing problems caused by changes in the inner diameter during subsequent use. The tightness of the support can also affect the deformation behavior of the plastic pipe. Tighter support can limit excessive deformation on the inside, ensuring the accuracy and consistency of bending, while the outer support can help maintain overall stability and prevent twisting or irregular deformation during bending. By controlling the tightness of the support, the performance of the plastic material can be maximized, avoiding material fatigue caused by excessive support or uneven deformation caused by insufficient support, thereby achieving a more efficient bending process.

[0013] 2. This irregularly shaped pipe processing device uses an airbag fixed to a fixed end. Air is inflated through an outlet on the fixed end, blowing hot air into the airbag. The airbag transfers heat to the plastic pipe, bringing it to the required bending temperature and maintaining that temperature during bending. This effectively prevents the pipe from cooling down and becoming difficult to bend during continuous bending adjustments. Simultaneously, the airbag heats the pipe, acting as a heat transfer medium, ensuring more efficient and even heat distribution. Due to the tight fit between the airbag and the inner wall of the pipe, heat spreads quickly and evenly throughout the entire pipe, preventing localized overheating or uneven temperature distribution that could lead to cracking during bending. By controlling heat transfer within the airbag, the softening degree of the tubing can be precisely adjusted, ensuring accuracy and consistency during bending. The airbag features threaded retaining rings at the bends in the plastic tubing. During bending, the spacing between the rings on the inner side of the bend decreases, resulting in tighter support. The airbag provides uniform and adjustable support force to the plastic tubing during bending. Due to its flexibility and deformability, the airbag fits tightly against the inner wall of the tubing, effectively preventing excessive deformation or damage during bending. The threaded retaining rings reduce the spacing between the rings on the inner side of the bend, enhancing the tightness of the support. The threaded design also increases friction between the airbag and the inner wall of the tubing. This helps maintain the airbag's position during bending, preventing slippage or displacement, thus ensuring the durability and reliability of the support effect.

[0014] 3. The special-shaped pipe processing device uses a bending spring as a support. The bending spring consists of an elastic shaft and threaded spring sheets around the elastic shaft. During the bending process of the plastic pipe, the spacing between the spring sheets on the inner side of the bend decreases, making the support tighter. The different support tightness can also affect the deformation behavior of the plastic pipe. Tighter support can limit excessive deformation on the inner side and ensure the accuracy and consistency of bending. The outer support helps maintain overall stability and prevents twisting or irregular deformation during bending. An air outlet is provided on the fixed end, allowing airflow to be blown into the plastic tube. Guided by the spring plates on the bending spring, the airflow flows around the tube wall, and the hot airflow flows along the bending spring and around the tube wall, ensuring that the plastic tube receives uniform heating in the bending area. This uniform heating not only reduces heating time but also ensures that the plastic tube material reaches a consistent softening state before bending. By adjusting the temperature and flow rate of the hot airflow, the degree of softening of the material can be precisely controlled, thus avoiding bending problems caused by over-softening or under-softening. Through the support of the bending spring and the action of the hot airflow, the plastic tube can maintain a more stable shape and structure during bending. The bending spring limits the deformation range of the pipe during bending, ensuring the accuracy of the bending angle and radius. After the hot airflow softens the material, the bending spring... The supporting function helps the pipe maintain its bent shape, reducing the possibility of springback or deformation, thereby improving bending accuracy and consistency. As the spacing between the bending springs changes, the flow of hot air is adjusted accordingly. On the inner side of the bend, the reduced spacing makes the hot air flow more concentrated, thus enhancing the heating effect on the inner side. This helps ensure that the inner material is fully softened, reducing uneven bending or stress concentration caused by insufficient local temperature. On the outer side of the bend, the increased spacing allows the hot air flow to be smoother, avoiding flow obstruction caused by bending. This ensures that the outer material is also heated evenly, reducing bending problems caused by insufficient heating on the outer side. During the bending process, the compression of the inner material and the stretching of the outer material will generate stress. The flow of hot air can accelerate the softening of the material, making it easier to flow and deform. This helps reduce stress concentration caused by material rigidity, making the bending process smoother.

[0015] 4. This irregularly shaped pipe processing device includes infrared lasers installed on the first and second fixed pipes. These lasers emit infrared light, and a detection plate is positioned on the outside of the plastic pipe bend. The light emitted by the two infrared lasers converges on the detection plate. The detection plate adjusts its tilt angle as it determines the bending angle of the plastic pipe. When the light spots formed by the infrared lasers at both ends on the detection plate coincide, it indicates that the plastic pipe has been bent to the correct position. By observing the convergence of the infrared laser light on the detection plate, it is possible to very accurately determine whether the bending angle of the plastic pipe has reached the predetermined value. When the light spot of the optical transducer coincides with the detection plate, it means that the bending angle is accurate. This greatly improves the precision and reliability of the bending process. During the bending process, the detection plate can provide real-time feedback on the changes in the bending angle. If the light spots do not coincide, the operator can adjust the bending force or angle in time according to the offset of the light spots until the required bending angle is achieved. This real-time feedback mechanism helps to reduce errors and improve bending quality. Because it can accurately and quickly determine the bending angle, this structure significantly improves the efficiency of plastic pipe bending. Operators do not need to repeatedly check and adjust the bending angle, thus saving time and labor costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the infrared laser detection method of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of an airbag according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the inner retaining ring of the airbag in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the inner retaining ring of the airbag in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of a bending spring according to Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of gas flow in Embodiment 2 of the present invention.

[0017] In the diagram: 1. Fixed end; 2. Airbag; 3. Detection plate; 4. Spring; 11. First fixed tube; 12. Second fixed tube; 21. Airbag deflation port; 22. Infrared detector; 23. Retaining ring; 101. Infrared laser; 102. Air outlet; 121. Moving guide rail. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-3 The irregular pipe fitting processing device includes a first fixed pipe 11, a second fixed pipe 12, and a moving guide rail 121. When workers are laying out large-diameter plastic water pipes, the pipes need to bend at the bends. Normally, the bends are 90°. When workers need a non-90° bend, the original pipe needs to be bent. The two ends of the plastic pipe are fixed to the first fixed pipe 11 and the second fixed pipe 12, respectively. The second fixed pipe 12 is mounted on the moving guide rail 121. After heating the plastic pipe, it is bent by sliding the second fixed pipe 12 on the moving guide rail 121. The first fixed pipe 11 is connected to a fixed end 1, which is fixed in position and has an elastic support. When the material is fixed in the plastic tube, it is inserted into the tube. During the bending process, as the bending angle increases, the support on the inner side of the bend becomes tighter, and the support force is concentrated. During bending, the inner side of the plastic tube is subjected to compressive stress, while the outer side is subjected to tensile stress. By adjusting the tightness of the support on the inner and outer sides, these stresses can be effectively balanced. Tighter support can reduce compressive deformation on the inner side, while appropriate support on the outer side can help resist tensile stress, thereby reducing the risk of material breakage during bending. At the same time, by utilizing the support to support the inner wall of the tube, deformation caused by stress at the bend is effectively avoided, and the inner diameter of the tube wall at the bend remains unchanged, avoiding problems caused by changes in the inner diameter of the tube during subsequent use.

[0020] See Figures 4-6The support is specifically an airbag 2, which is fixed to the fixed end 1. The airbag 2 is inflated by an air outlet 102 on the fixed end 1, allowing hot air to be blown into it. The airbag 2 then transfers heat to the plastic tubing, bringing it to the required bending temperature and maintaining it during bending. This effectively prevents the tubing from cooling down and becoming difficult to bend during continuous bending adjustments. Furthermore, using the airbag 2 to transfer heat ensures more even heating, preventing localized overheating leading to melting or localized underheating causing breakage during bending. The airbag 2 features a threaded retaining ring 23 at the bend of the plastic tube. During bending, the spacing between the rings on the inner side of the bend decreases, resulting in tighter support. The airbag 2 provides uniform and adjustable support force to the plastic tube during bending. Due to its flexibility and deformability, the airbag 2 can closely conform to the inner wall of the tube, effectively preventing excessive deformation or damage during bending. The threaded retaining ring design reduces the spacing between the rings on the inner side of the bend, enhancing the tightness of the support. The threaded design also increases the friction between the airbag and the inner wall of the tube. This helps maintain the stability of the airbag's position during bending, preventing slippage or displacement, thus ensuring the durability and reliability of the support effect.

[0021] See Figure 4 The airbag 2 has an airbag deflation port 21 at one end of the second fixed tube 12. An infrared detector 22 is provided on the outward-facing side of the second fixed tube 12. The infrared detector 22 can detect the horizontal movement distance of the airbag deflation port 21 on the airbag 2 and control the opening and closing of the airbag deflation port 21. When the plastic tube is bent, if there is enough gas inside the airbag 2, it will bulge outward due to the compression and will bulge towards the second fixed tube 12. When the infrared rays emitted by the infrared detector 22 are blocked due to the expansion of the airbag 2, the airbag deflation port 21 is controlled to open to release the gas and reduce the gas content in the airbag 2. This can effectively prevent the airbag 2 from being squeezed when the tube is bent, so that the airbag 2 generates a reaction force on the bend, causing the diameter of the tube at the bend to increase and expand, which would affect subsequent use.

[0022] See Figure 2The first fixed tube 11 and the second fixed tube 12 are equipped with infrared lasers 101, which can emit infrared light. A detection plate 3 is provided on the outside of the plastic tube bend. The light emitted by the two infrared lasers 101 can converge on the detection plate 3. When the bending angle of the plastic tube is determined, the tilt angle of the detection plate 3 will also be adjusted. When the light spots formed by the infrared lasers 101 at both ends on the detection plate 3 coincide, it means that the plastic tube has been bent in place. Heating and further bending are stopped. After the plastic tube cools down, it is removed.

[0023] Working Principle: One end of the plastic pipe is fixed to the first fixed pipe 11, and the other end is fixed to the second fixed pipe 12. A circular elastic support is placed inside the pipe. During the bending process of the plastic pipe, from a physics perspective, when the plastic pipe is subjected to bending force, the stress on its inner and outer sides is different. The inner side is subjected to compressive force, and the outer side is subjected to tensile force. This uneven stress will cause the pipe to deform. Due to compression, the material density on the inner side increases, while due to tension, the material distribution on the outer side becomes more sparse. This deformation accumulates, causing the originally circular cross-section to become elliptical. The airbag 2 is inflated to provide support to the inner wall of the pipe, which can support the pipe wall during bending and prevent the plastic pipe from deforming. At the same time, it can ensure that the inner diameter of the plastic pipe does not change, reducing the stains caused by changes in pipe diameter during use. During the bending process, hot air is introduced into the airbag 2 through the air outlet 102 on the fixed end 1 to fill the airbag 2 with high-temperature gas. The hot air transfers heat between the airbag 2 and the pipe diameter, raising the pipe to a temperature suitable for bending and maintaining this temperature. This avoids the temperature drop during bending after heating, which can lead to defects in traditional bending processes. Finally, the infrared lasers 101 set on the first fixed pipe 11 and the second fixed pipe 12 determine whether the bending angle is correct. The infrared lasers 101 at both ends emit lasers to form light spots on the detection plate 3. When the bending angle of the plastic pipe is determined, the tilt angle of the detection plate 3 is also adjusted. When the light spots formed by the infrared lasers 101 at both ends on the detection plate 3 coincide, it means that the plastic pipe has been bent to the correct position. Heating and further bending are stopped, and the plastic pipe is removed after cooling.

[0024] Example 2: Please refer to Figures 1-3The irregular pipe fitting processing device includes a first fixed pipe 11, a second fixed pipe 12, and a moving guide rail 121. When workers are laying out large-diameter plastic water pipes, the pipes need to bend at the bends. Normally, the bends are 90°. When workers need a non-90° bend, the original pipe needs to be bent. The two ends of the plastic pipe are fixed to the first fixed pipe 11 and the second fixed pipe 12, respectively. The second fixed pipe 12 is mounted on the moving guide rail 121. After heating the plastic pipe, it is bent by sliding the second fixed pipe 12 on the moving guide rail 121. The first fixed pipe 11 is connected to a fixed end 1, which is fixed in position and has an elastic support. When the material is fixed in the plastic tube, it is inserted into the tube. During the bending process, as the bending angle increases, the support on the inner side of the bend becomes tighter, and the support force is concentrated. During bending, the inner side of the plastic tube is subjected to compressive stress, while the outer side is subjected to tensile stress. By adjusting the tightness of the support on the inner and outer sides, these stresses can be effectively balanced. Tighter support can reduce compressive deformation on the inner side, while appropriate support on the outer side can help resist tensile stress, thereby reducing the risk of material breakage during bending. At the same time, by utilizing the support to support the inner wall of the tube, deformation caused by stress at the bend is effectively avoided, and the inner diameter of the tube wall at the bend remains unchanged, avoiding problems caused by changes in the inner diameter of the tube during subsequent use.

[0025] See Figure 7 The support is specifically a bending spring 4, which consists of an elastic shaft and threaded spring sheets surrounding the elastic shaft. During the bending process of the plastic tube, the spring sheets and the elastic shaft bend together with the tube. During the bending process, the spacing between the spring sheets on the inner side of the bend decreases, making the support tighter, while the spacing between the spring sheets on the outer side increases. The support on the inner side of the bend (i.e., the side subjected to compressive stress) should be tighter because the compressive deformation on the inner side is more likely to cause inaccurate shape or breakage. By increasing the tightness of the support on the inner side, these risks can be effectively reduced. The support on the outer side should be sufficient to prevent overstretching and maintain overall stability. However, the tightness of the support on the outer side can be appropriately adjusted relative to the inner side to adapt to specific bending requirements and material properties.

[0026] See Figure 3 , Figures 7-8The fixed end 1 is provided with an air outlet 102, which can blow air into the plastic tube. Under the guidance of the spring on the bending spring 4, the airflow flows around the tube wall. When the hot airflow flows along the spring along the tube wall, it can form a relatively uniform temperature distribution inside the tube. This uniform heating helps to ensure that the material softening degree of the plastic tube is consistent in the bending area, thereby avoiding uneven deformation or stress concentration caused by local overheating or underheating. On the inner side of the bend, the reduced spacing makes the hot airflow more concentrated, thereby enhancing the heating effect on the inner side. This helps to ensure that the inner material softens sufficiently, reducing uneven bending or stress concentration caused by local underheating. In addition, the spring increases the contact area with the hot airflow, and the spring can also transfer heat to the inner wall of the tube to help with heating.

[0027] The surface of the reed is provided with recessed textures along the spiral direction. The recessed textures increase the contact area with the hot airflow and guide the airflow, thereby reducing the generation of turbulence and optimizing the internal gas flow.

[0028] See Figure 2 The first fixed tube 11 and the second fixed tube 12 are equipped with infrared lasers 101, which can emit infrared light. A detection plate 3 is provided on the outside of the plastic tube bend. The light emitted by the two infrared lasers 101 can converge on the detection plate 3. When the bending angle of the plastic tube is determined, the tilt angle of the detection plate 3 will also be adjusted. When the light spots formed by the infrared lasers 101 at both ends on the detection plate 3 coincide, it means that the plastic tube has been bent in place. Heating and further bending are stopped. After the plastic tube cools down, it is removed.

[0029] Working Principle: One end of the plastic pipe is fixed to the first fixed pipe 11, and the other end is fixed to the second fixed pipe 12. A circular elastic support is placed inside the pipe. During the bending process of the plastic pipe, from a physics perspective, when the plastic pipe is subjected to bending force, the stress on its inner and outer sides is different. The inner side is subjected to compressive force, and the outer side is subjected to tensile force. This uneven force will cause the pipe to deform. Due to compression, the material density on the inner side increases, while due to tension, the material distribution on the outer side becomes more sparse. This deformation accumulates, causing the originally circular cross-section to become elliptical. The support can support the pipe wall during the bending process, preventing the plastic pipe from deforming. At the same time, it can ensure that the inner diameter of the plastic pipe does not change, reducing the accumulation of stains or damage caused by changes in pipe diameter during use. During the bending process, hot air is sent to the inner wall of the plastic pipe through the fixed end 1. The hot air flows on the pipe wall for uniform heating. The support is placed at the bend of the plastic pipe. A spiral gas flow channel is provided. As the plastic tube is bent, the gap between the channels on the inner side of the bend gradually decreases, while the gap between the channels on the outer side of the bend continuously increases. The heating area and flow velocity of the airflow in the channel are affected by the gap. When the gap decreases, the airflow velocity increases, resulting in higher heating efficiency. The inner and outer sides of the plastic tube are subjected to different stresses. The inner side is compressed due to bending, while the outer side is stretched. By adjusting the heating area, these stresses can be balanced, making the bending process smoother. Finally, infrared lasers 101 set on the first fixed tube 11 and the second fixed tube 12 are used to determine whether the bending angle is in place. The infrared lasers 101 at both ends emit lasers, forming light spots on the detection plate 3. When the bending angle of the plastic tube is determined, the tilt angle of the detection plate 3 is also adjusted. When the light spots formed by the infrared lasers 101 at both ends on the detection plate 3 coincide, it indicates that the plastic tube has been bent in place. Heating and further bending are stopped. After the plastic tube cools down, it is removed.

[0030] 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.

[0031] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for processing irregularly shaped pipe fittings, comprising a first fixed pipe (11), a second fixed pipe (12), and a moving guide rail (121), wherein both ends of a plastic pipe are respectively fixed on the first fixed pipe (11) and the second fixed pipe (12), the second fixed pipe (12) is disposed on the moving guide rail (121), and the plastic pipe is bent by sliding the second fixed pipe (12) on the moving guide rail (121), characterized in that: The first fixed tube (11) is connected to the fixed end (1). The fixed end (1) is fixed in position and is provided with an elastic support. When the plastic tube is fixed, the support is inserted into the tube. During the bending process of the plastic tube, as the bending angle increases, the support stress on the inner side of the bend becomes more and more concentrated. The fixed end (1) is provided with an air outlet (102). The air outlet (102) can blow out hot air. The hot air enters the plastic tube to heat it. The support is specifically an airbag (2). The airbag (2) is fixed on the fixed end (1) and is inflated by the air outlet (102) provided on the fixed end (1). The airbag (2) is provided with a threaded retaining ring (23) at the bend of the plastic tube. During the bending process of the plastic tube, the distance between the rings of the retaining ring (23) at the inner side of the bend decreases.

2. The irregular pipe fitting processing device according to claim 1, characterized in that: The airbag (2) has an airbag deflation port (21) at one end of the second fixed tube (12). An infrared detector (22) is provided on the outward side of the second fixed tube (12). The infrared detector (22) can detect the horizontal movement distance of the airbag deflation port (21) on the airbag (2) and control the opening and closing of the airbag deflation port (21).

3. The irregular pipe fitting processing apparatus according to any one of claims 1-2, characterized in that: Infrared lasers (101) are provided on the first fixed tube (11) and the second fixed tube (12). The infrared lasers (101) can emit infrared light, and a detection plate (3) is provided on the outside of the bend of the plastic tube. The light emitted by the two infrared lasers (101) can converge on the detection plate (3).

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