Heating composite automatic pipe penetrating device for plastic-lined composite pipe

Abstract

The invention relates to the technical field of production of plastic-lined composite pipes, in particular to a heating composite automatic pipe penetrating device for a plastic-lined composite pipe. The invention provides the heating composite automatic pipe penetrating device for the plastic-lined composite pipe, which can automatically fix a plastic pipe for pipe penetrating operation and can clean the inner wall of the steel pipe while penetrating the pipe. A plastic-lined composite pipe heating composite automatic pipe penetrating device comprises a base, a first installation frame and the like, and the upper side of the right portion of the base is connected with the first installation frame. A hot-pressing outer rod rotates around a plastic pipe by a circle, so that a port of the plastic pipe deforms to be attached to a conical arc plate, then an air cylinder is started, a conical clamping barrel is pushed to move leftwards to be matched with the conical arc plate to clamp the plastic pipe, a first electric sliding rail is started, a guide rod moves rightwards, and then the plastic pipe is pulled to move rightwards to penetrate into a steel pipe; and the effects that the plastic pipe can be automatically fixed for pipe penetrating operation, manpower is saved, and the pipe penetrating efficiency and quality are improved are achieved.

Description

Technical Field

[0001] This invention relates to the field of plastic-lined composite pipe production technology, and in particular to an automatic pipe threading device for heating and bonding plastic-lined composite pipes. Background Technology

[0002] Plastic-lined composite pipes, which combine the strength of metal pipes with the corrosion resistance of plastic pipes, are widely used in chemical, municipal water supply, and oil transportation industries. In their production, the composite insertion process of the steel and plastic pipes is a crucial step determining product quality and production efficiency. This process requires precisely inserting the plastic pipe into the inner wall of the steel pipe and achieving a tight bond between the two through subsequent composite processes.

[0003] A pipe threading machine for plastic-lined composite pipes, disclosed in CN207386966U, includes a fixed support; a rectangular working plate is horizontally arranged on the fixed support; a winch is arranged on the left side of the working plate; the winch includes a drum; a first steel rope is wound clockwise around the front end of the drum, and a second steel rope is wound counterclockwise around the rear end of the drum; a reinforcing rib is provided at the connection between the first and second steel ropes; a hook is provided at the right end of the reinforcing rib; a conical block is hooked on the hook; the first steel rope is also wound around the outer circumference of a guide wheel; the guide wheel is arranged on a mounting bracket; the mounting bracket has an upper surface of the working plate; a mounting cross plate is arranged between the mounting brackets; a cylinder is arranged on the mounting cross plate; a pressing block is provided at the end of the cylinder's push rod; a steel pipe positioning block is arranged directly below the pressing block on the upper surface of the working plate; this reduces the workload of workers and improves production efficiency. However, the plastic-lined composite pipe threading machine requires manual clamping of the plastic pipe onto the conical block before pulling the plastic pipe into the steel pipe, which is cumbersome, time-consuming, labor-intensive, and requires additional cleaning of the inner wall of the steel pipe before threading, thus reducing the threading efficiency.

[0004] Therefore, a heating composite automatic pipe threading device for plastic-lined composite pipes has been developed that can automatically fix plastic pipes for pipe threading operations and clean the inner wall of steel pipes at the same time. Summary of the Invention

[0005] To overcome the shortcomings of existing plastic-lined composite pipe threading machines, which require manual clamping of the plastic pipe onto a conical block before pulling it into the steel pipe, making the operation cumbersome, time-consuming, labor-intensive, and requiring additional cleaning of the steel pipe's inner wall before threading, thus reducing threading efficiency, this invention provides a heated composite automatic threading device for plastic-lined composite pipes that can automatically fix the plastic pipe for threading and simultaneously clean the inner wall of the steel pipe.

[0006] An automatic pipe threading device for heating and assembling plastic-lined composite pipes includes a base, a first mounting frame, a second mounting frame, a mounting plate, a conveying component, a positioning component, a pipe threading mechanism, a hot pressing mechanism, and a cleaning mechanism. The first mounting frame is connected to the upper right side of the base, the second mounting frame is connected to the upper left side of the base, and the mounting plate is connected to the upper middle side of the base. Multiple conveying components and positioning components are provided on the upper upper side of the mounting plate. The first mounting frame is equipped with a pipe threading mechanism that can pull the plastic lining for pipe threading. The second mounting frame is equipped with a hot pressing mechanism that can hot press the plastic pipe. The pipe threading mechanism is equipped with a cleaning mechanism that can clean the inner wall of the steel pipe.

[0007] To further explain, the conveying components consist of a conveyor belt for forward and backward transport and two conveyor rollers for left and right transport. The conveyor belt, conveyor rollers, and processor are electrically connected through a control module.

[0008] To further explain, the positioning components consist of an electric actuator, a V-shaped positioning plate, and an infrared sensor. The electric actuator, infrared sensor, and processor are electrically connected through a control module.

[0009] To further explain, the tube-threading mechanism includes a first electric slide rail, a guide rod, a first support frame, a conical arc plate, a cylinder, a conical clamp, a cooling module, a second electric slide rail, a wedge-shaped support frame, a hinge plate, and pulleys. Multiple first electric slide rails are connected to the upper side of the first mounting frame. The first electric slide rails and the processor are electrically connected via a control module. Guide rods are connected to the sliders of each first electric slide rail. A first support frame is connected to the left side of each guide rod. Multiple conical arc plates are connected to the left side of each first support frame. A cylinder is connected inside the first support frame. The cylinder and the processor are electrically connected via a control module. A conical clamp is connected to the telescopic end of the cylinder. The conical clamp passes between the conical arc plates. Cooling modules are connected to the inner side of each conical arc plate. A second electric slide rail is connected to the lower left side of each guide rod. The second electric slide rail and the processor are electrically connected through a control module. A wedge-shaped support frame is connected to the slider of each second electric slide rail. The wedge-shaped support frame is slidably connected to the adjacent guide rod. Multiple hinge plates are rotatably connected to each first support frame. The hinge plates are in contact with the adjacent wedge-shaped support frames. A pulley is rotatably connected to each hinge plate. When the first electric slide rail is activated, the guide rod is pushed to the left, so that the guide rod and the first support frame pass through the steel pipe and push the conical arc plate into the plastic pipe.

[0010] Further explanation: The hot pressing mechanism includes a circular electric slide rail, a fourth electric slide rail, a support block, a heating module, a connecting frame, contact rods, a hot pressing outer rod, and a heat-conducting rod. Multiple circular electric slide rails are connected to the second mounting frame. The circular electric slide rails and the processor are electrically connected via a control module. A fourth electric slide rail is connected to the slider of each circular electric slide rail. The fourth electric slide rail and the processor are electrically connected via a control module. A support block is connected to the slider of each fourth electric slide rail. A heating module is connected to the upper middle part of the second mounting frame. A connecting frame is connected to the right side of the heating module. Multiple contact rods are connected to the connecting frame. The contact rods are all connected to the heating module via wires. A hot pressing outer rod is connected to each support block. Each hot pressing outer rod has internal connections... The heat-conducting rods are in contact with adjacent contact rods. When the heating module is activated, electricity is supplied to the heat-conducting rods through the contact rods, heating them to the specified melting point of deformation. Then, the fourth electric slide rail is activated, causing the support block, hot-pressing outer rod, and heat-conducting rod to move downwards and contact the end of the plastic tube. Subsequently, the circular electric slide rail is activated, causing the fourth electric slide rail, support block, hot-pressing outer rod, and heat-conducting rod to rotate around the plastic tube once, so that the end of the plastic tube deforms and fits against the conical arc plate. The cooling module is used to cool and shape the heated and deformed plastic tube. Then, the cylinder is activated, pushing the conical clamp to move to the left to cooperate with the conical arc plate and clamp the plastic tube. Then, the first electric slide rail is activated, causing the guide rod to move to the right, thereby pulling the plastic tube to the right and inserting it into the steel tube.

[0011] To further explain, the cleaning mechanism includes a mounting ring, an airbag, a cleaning brush, and an air inlet pipe. The mounting ring is connected to the left side of the first support frame, and the airbag is connected to the mounting ring. The cleaning brush is connected to the airbag, and the air inlet pipe is connected to the inner side of the upper part of the airbag. The air inlet pipe passes through the mounting ring and connects to the first support frame. An air pump is connected to the outside of the air inlet pipe. Before the pipe insertion operation, the airbag is located inside the steel pipe. The air pump is started to inflate the airbag, so that when the pipe is inserted, the cleaning brush moves along the inner wall of the steel pipe to clean the inner wall of the steel pipe.

[0012] Further explanation: It also includes a cutting mechanism, which includes a second support frame, an electric push rod, and a bevel cutter. The second support frame is connected to the left side of the first support frame. Multiple electric push rods are connected to the second support frame. The electric push rods and the processor are electrically connected through a control module. A bevel cutter is connected to the telescopic end of each electric push rod. When the electric push rod on the second support frame is activated, it pushes the bevel cutter to move outward and cuts the deformed part of the plastic tube. Then, the conical arc plate continues to move to the right so that the conical arc plate can be separated from the plastic tube.

[0013] To further explain, the bevel cutter is tilted inward.

[0014] Further explanation: It also includes a pipe cutting mechanism, which includes a third electric slide rail, a motor, and a saw blade. The third electric slide rail is connected to the upper left side of the first mounting bracket. The third electric slide rail and the processor are electrically connected through a control module. The motor is connected to the slider of the third electric slide rail. The motor and the processor are electrically connected through a control module. The saw blade is connected to the output shaft of the motor. When the third electric slide rail and the motor are started, the saw blade moves to the deformed part of the plastic pipe and cuts it off.

[0015] Further explanation: It also includes a spraying mechanism, which includes a storage tank, a delivery pipe, an electric pump, a spray nozzle, a high-temperature resistant rubber sheet, a spray plate, and a mounting base. The storage tank is connected to the upper side of the middle of the connecting frame, and the delivery pipe is connected to the right side of the storage tank. Multiple electric pumps are connected to the lower side of the delivery pipe. The electric pumps and the processor are electrically connected through a control module. Spray nozzles are connected to the lower side of each electric pump. Multiple mounting bases are connected to the lower side of the connecting frame. Each electric pump is connected to an adjacent mounting base. High-temperature resistant rubber sheets are connected to the lower sides of both the front and rear parts of the mounting base. Spray plates are connected to the inner side of each high-temperature resistant rubber sheet. Each spray plate is connected to an adjacent spray nozzle. When the electric pump is started, the release agent is delivered to the spray plate through the delivery pipe and the spray nozzle, so that the spray plate sprays the release agent onto the hot-pressed outer rod.

[0016] The beneficial effects of this invention are as follows: 1. This invention rotates the hot-pressed outer rod around the plastic tube, causing the plastic tube end to deform and fit against the conical arc plate. Then, the cylinder is activated to push the conical clamp to the left to cooperate with the conical arc plate to clamp the plastic tube. Then, the first electric slide rail is activated to move the guide rod to the right, thereby pulling the plastic tube to the right to pass through the steel pipe. This achieves the effect of automatically fixing the plastic tube for the tube-passing operation, saving manpower, and improving tube-passing efficiency and quality.

[0017] 2. This invention uses an air pump to inflate the airbag, allowing the cleaning brush to move along the inner wall of the steel pipe during the pipe insertion process, thus cleaning the inner wall of the steel pipe simultaneously with the insertion, simplifying the operation process and improving operational efficiency.

[0018] 3. When inserting the pipe, the second electric slide rail is activated to move the wedge-shaped support frame to the left, pushing the hinge plate to rotate until the pulley contacts the inner wall of the steel pipe, thereby improving the stability of the pipe insertion.

[0019] 4. This invention activates the electric push rod on the second support frame to push the oblique cutter outward to cut the deformed part of the plastic tube, and then makes the conical arc plate continue to move to the right so that the conical arc plate can be separated from the plastic tube, which facilitates subsequent operations.

[0020] 5. This invention uses a third electric slide rail and motor to move the saw blade to the deformed part of the plastic pipe and cut it off, thereby completing the pipe insertion operation of the plastic-lined composite pipe.

[0021] 6. This invention uses an electric pump to deliver the release agent to the spray plate through a delivery pipe and a spray nozzle, so that the spray plate sprays the release agent onto the hot-pressed outer rod, thereby preventing the hot-pressed outer rod from overheating and sticking to the plastic tube. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0024] Figure 3 This is a three-dimensional structural diagram of the first part of the tube-insertion mechanism of the present invention.

[0025] Figure 4 This is a three-dimensional structural diagram of the second part of the tube-insertion mechanism of the present invention.

[0026] Figure 5 This is a three-dimensional structural diagram of the third part of the tube-piercing mechanism of the present invention.

[0027] Figure 6 This is a three-dimensional structural diagram of the fourth part of the tube-piercing mechanism of the present invention.

[0028] Figure 7 This is a three-dimensional structural diagram of the cleaning mechanism of the present invention.

[0029] Figure 8 This is a three-dimensional structural diagram of the slitting mechanism of the present invention.

[0030] Figure 9 This is a partial three-dimensional structural schematic diagram of the slitting mechanism of the present invention.

[0031] Figure 10 This is a three-dimensional structural diagram of the hot pressing mechanism of the present invention.

[0032] Figure 11 This is a three-dimensional structural diagram of the first part of the hot pressing mechanism of the present invention.

[0033] Figure 12 This is a three-dimensional structural diagram of the second part of the hot pressing mechanism of the present invention.

[0034] Figure 13 This is a three-dimensional structural diagram of the spraying mechanism of the present invention.

[0035] In the attached diagrams: 1: Base; 2: First mounting bracket; 21: Second mounting bracket; 3: Mounting plate; 31: Conveying assembly; 4: Positioning assembly; 5: Pipe threading mechanism; 51: First electric slide rail; 52: Guide rod; 53: First support frame; 54: Conical arc plate; 55: Cylinder; 56: Conical clamp; 57: Cooling module; 501: Second electric slide rail; 502: Wedge-shaped support frame; 503: Hinge plate; 504: Pulley; 6: Cutting mechanism; 61: Second support frame; 62: Electric push rod; 63: Bevel cutter; 7: Pipe cutting mechanism; 1: Third electric slide rail; 72: Motor; 73: Saw blade; 8: Hot pressing mechanism; 81: Circular electric slide rail; 82: Fourth electric slide rail; 83: Support block; 84: Heating module; 841: Connecting frame; 85: Contact rod; 86: Hot pressing outer rod; 87: Heat conducting rod; 9: Spraying mechanism; 91: Storage tank; 92: Conveying pipe; 93: Electric pump; 94: Spray pipe; 95: High temperature resistant rubber sheet; 96: Spray plate; 97: Mounting seat; 10: Cleaning mechanism; 101: Mounting ring; 102: Airbag; 103: Cleaning brush; 104: Air connection pipe. Detailed Implementation

[0036] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0037] An automatic pipe threading device for heating and bonding plastic-lined composite pipes, such as Figures 1-13 As shown, the system includes a base 1, a first mounting bracket 2, a second mounting bracket 21, a mounting plate 3, a conveying assembly 31, a positioning assembly 4, a tube-threading mechanism 5, a thermo-pressing mechanism 8, and a cleaning mechanism 10. The first mounting bracket 2 is connected to the upper right side of the base 1, the second mounting bracket 21 is connected to the upper left side of the base 1, and the mounting plate 3 is connected to the upper middle side of the base 1. The mounting plate 3 has three conveying assemblies 31 on its upper side. Each conveying assembly 31 consists of a conveyor belt for forward and backward conveying and two conveying rollers for left and right conveying. The conveyor belt, conveying rollers, and processor are electrically connected through a control module. The mounting plate 3 has twelve positioning assemblies 4. Each positioning assembly 4 consists of an electric push rod, a V-shaped positioning plate, and an infrared sensor. The electric push rod, infrared sensor, and processor are electrically connected through a control module. The first mounting bracket 2 has a tube-threading mechanism 5, the second mounting bracket 21 has a thermo-pressing mechanism 8, and the tube-threading mechanism 5 has a cleaning mechanism 10.

[0038] like Figures 2-6As shown, the tube-passing mechanism 5 includes a first electric slide rail 51, a guide rod 52, a first support frame 53, a conical arc plate 54, a cylinder 55, a conical clamp 56, a cooling module 57, a second electric slide rail 501, a wedge-shaped support frame 502, a hinge plate 503, and a pulley 504. Three first electric slide rails 51 are connected to the upper side of the first mounting frame 2. The first electric slide rails 51 and the processor are electrically connected via a control module. Guide rods 52 are connected to the sliders of each first electric slide rail 51, and each guide rod 52 passes through the first mounting frame 2. A first support frame 53 is connected to the left side of each guide rod 52. Three conical arc plates 54 are connected to the left side of each first support frame 53. A cylinder 55 is connected inside the first support frame 53. The processor is electrically connected to the cylinder 55 via a control module. A conical clamp 56 is connected to the telescopic end of the cylinder 55. The conical clamp 56 passes between conical arc plates 54. Cooling modules 57 are connected to the inner side of each conical arc plate 54. A second electric slide rail 501 is connected to the lower left side of each guide rod 52. The second electric slide rail 501 and the processor are electrically connected via a control module. A wedge-shaped support frame 502 is connected to the slider of each second electric slide rail 501. The wedge-shaped support frame 502 is slidably connected to the adjacent guide rod 52. Three hinge plates 503 are rotatably connected to each first support frame 53. The hinge plates 503 are in contact with the adjacent wedge-shaped support frames 502. A pulley 504 is rotatably connected to each hinge plate 503.

[0039] like Figures 10-13 As shown, the hot pressing mechanism 8 includes a circular electric slide rail 81, a fourth electric slide rail 82, a support block 83, a heating module 84, a connecting frame 841, a contact rod 85, a hot pressing outer rod 86, and a heat-conducting rod 87. Three circular electric slide rails 81 are connected to the second mounting bracket 21. The circular electric slide rails 81 and the processor are electrically connected via a control module. The sliders of each circular electric slide rail 81 are connected to the fourth electric slide rail 82, and the fourth electric slide rail 82 and the processor are electrically connected via a control module. The fourth electric slide rail 82 has a support block 83 connected to its slider. The second mounting bracket 21 has a heating module 84 connected to its upper middle side. The heating module 84 has a connecting bracket 841 connected to its right side. The connecting bracket 841 has three contact rods 85 connected to it. The contact rods 85 are all connected to the heating module 84 by wires. The support block 83 has a hot-pressing outer rod 86 connected to it. The hot-pressing outer rod 86 has a heat-conducting rod 87 connected inside it. The heat-conducting rod 87 is in contact with the adjacent contact rod 85.

[0040] like Figure 5 and Figure 7As shown, the cleaning mechanism 10 includes a mounting ring 101, an airbag 102, a cleaning brush 103, and an air inlet pipe 104. The mounting ring 101 is connected to the left side of the first support frame 53. The airbag 102 is connected to the mounting ring 101. The cleaning brush 103 is connected to the airbag 102. The air inlet pipe 104 is connected to the inner side of the upper part of the airbag 102. The air inlet pipe 104 passes through the mounting ring 101 and connects to the first support frame 53.

[0041] When using this invention, first place the base 1 in the pipe-passing area of ​​the plastic-lined composite pipe, then use the external pipe-feeding device to transport the plastic pipe to the right through the second mounting frame 21, and transport the steel pipe to the conveying assembly 31. Adjust the position of the steel pipe through the conveying assembly 31 so that the steel pipe is above the positioning assembly 4, and then use the positioning assembly 4 to push the steel pipe upward to align the steel pipe with the plastic pipe.

[0042] After alignment, the processor activates the first electric slide rail 51 via the control module, pushing the guide rod 52 to the left, causing the guide rod 52 and the first support frame 53 to pass through the steel pipe and push the conical arc plate 54 into the plastic pipe. Then, the heating module 84 is activated, energizing the heat-conducting rod 87 via the contact rod 85, heating the heat-conducting rod 87 to the specified temperature (the melting point of the plastic pipe deformation). Next, the fourth electric slide rail 82 is activated, causing the support block 83, the hot-pressing outer rod 86, and the heat-conducting rod 87 to move downwards and contact the end of the plastic pipe. Finally, the circular electric slide rail 81 is activated, causing the fourth electric slide rail 82 to... The support block 83, the hot-pressing outer rod 86, and the heat-conducting rod 87 rotate around the plastic tube to heat and soften it, causing the end of the plastic tube to deform and fit against the conical arc plate 54. The cooling module 57 is used to cool and shape the heated and deformed plastic tube. Then, the cylinder 55 is activated to push the conical clamp 56 to move to the left and cooperate with the conical arc plate 54 to clamp the plastic tube. Then, the first electric slide rail 51 is activated to move the guide rod 52 to the right, thereby pulling the plastic tube to the right to pass through the steel pipe. This can automatically fix the plastic tube for the tube-passing operation, saving manpower and improving tube-passing efficiency and quality.

[0043] During pipe threading, the processor activates the second electric slide rail 501 through the control module, causing the wedge support frame 502 to move to the left, pushing the hinge plate 503 to rotate until the pulley 504 contacts the inner wall of the steel pipe, thereby improving the stability of pipe threading.

[0044] Using the cleaning mechanism 10 of this device, the inner wall of the steel pipe can be automatically cleaned. The air pump is connected to the air inlet pipe 104. Before the pipe insertion operation, the air bladder 102 is located inside the steel pipe. The air pump is started to inflate the air bladder 102, so that when the pipe is inserted, the cleaning brush 103 moves along the inner wall of the steel pipe to clean the inner wall of the steel pipe. Thus, the inner wall of the steel pipe can be cleaned at the same time as the pipe is inserted, simplifying the operation process and improving the operation efficiency.

[0045] like Figure 8 and Figure 9As shown, it also includes a slitting mechanism 6, which includes a second support frame 61, an electric push rod 62, and a bevel cutter 63. The second support frame 61 is connected to the left side of the first support frame 53. Three electric push rods 62 are connected to the second support frame 61. The electric push rods 62 and the processor are electrically connected through a control module. A bevel cutter 63 is connected to the telescopic end of the electric push rod 62. The bevel cutter 63 is inclined inward to facilitate the slitting of the plastic tube.

[0046] Using the cutting mechanism 6 of this device, the deformed part of the plastic tube can be cut. After the plastic tube is inserted, the processor starts the electric push rod 62 on the second support frame 61 through the control module, pushes the oblique cutter 63 to move outward, cuts the deformed part of the plastic tube, and then makes the conical arc plate 54 continue to move to the right so that the conical arc plate 54 can be separated from the plastic tube, which facilitates subsequent operations.

[0047] like Figure 1 and Figure 2 As shown, it also includes a pipe cutting mechanism 7, which includes a third electric slide rail 71, a motor 72 and a saw blade 73. The third electric slide rail 71 is connected to the upper left side of the first mounting bracket 2. The third electric slide rail 71 and the processor are electrically connected through a control module. The motor 72 is connected to the slider of the third electric slide rail 71. The motor 72 and the processor are electrically connected through a control module. The saw blade 73 is connected to the output shaft of the motor 72.

[0048] Using the pipe cutting mechanism 7 of this device, the deformed part of the plastic pipe can be cut. After the conical arc plate 54 is separated from the plastic pipe, the processor starts the third electric slide rail 71 and motor 72 through the control module, so that the saw blade 73 moves to the deformed part of the plastic pipe and cuts it off, thereby completing the pipe threading operation of the plastic-lined composite pipe. Then, the pipe threaded steel pipe is transported to the next working area through the conveying component 31.

[0049] like Figure 1 and Figure 10 As shown, it also includes a spraying mechanism 9, which includes a storage tank 91, a delivery pipe 92, an electric pump 93, a spray pipe 94, a high-temperature resistant rubber sheet 95, a spray plate 96, and a mounting base 97. The storage tank 91 is connected to the upper side of the middle of the connecting frame 841, and the delivery pipe 92 is connected to the right side of the storage tank 91. Three electric pumps 93 are connected to the lower side of the delivery pipe 92. The electric pumps 93 and the processor are electrically connected through a control module. The spray pipe 94 is connected to the lower side of each electric pump 93. Three mounting bases 97 are connected to the lower side of the connecting frame 841. Each electric pump 93 is connected to an adjacent mounting base 97. The high-temperature resistant rubber sheet 95 is connected to the lower side of both the front and rear parts of the mounting base 97. The spray plate 96 is connected to the inner side of each high-temperature resistant rubber sheet 95. The spray plate 96 is connected to an adjacent spray pipe 94.

[0050] Using the spraying mechanism 9 of this device, the hot-pressed outer rod 86 can be prevented from sticking to the plastic tube. When the hot-pressed outer rod 86 moves downward, the processor starts the electric pump 93 through the control module, and delivers the release agent in the storage tank 91 to the spray plate 96 through the delivery pipe 92 and the spray pipe 94, so that the spray plate 96 sprays the release agent onto the hot-pressed outer rod 86. The high-temperature resistant rubber plate 95 can limit the spraying range of the release agent. When the hot-pressed outer rod 86 passes through the high-temperature resistant rubber plate 95, the high-temperature resistant rubber plate 95 spreads the release agent on the hot-pressed outer rod 86 evenly, thereby preventing the hot-pressed outer rod 86 from sticking to the plastic tube due to excessive temperature.

[0051] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. An automatic pipe threading device for heating and bonding plastic-lined composite pipes, characterized in that: It includes a base (1), a first mounting frame (2), a second mounting frame (21), a mounting plate (3), a conveying component (31), a positioning component (4), a pipe threading mechanism (5), a hot pressing mechanism (8), and a cleaning mechanism (10). The first mounting frame (2) is connected to the upper right side of the base (1), the second mounting frame (21) is connected to the upper left side of the base (1), and the mounting plate (3) is connected to the upper middle side of the base (1). Multiple conveying components (31) are provided on the upper side of the mounting plate (3), and multiple positioning components (4) are provided on the mounting plate (3). The first mounting frame (2) is provided with a pipe threading mechanism (5) that can pull the plastic lining for pipe threading. The second mounting frame (21) is provided with a hot pressing mechanism (8) that can hot press the plastic pipe. The pipe threading mechanism (5) is provided with a cleaning mechanism (10) that can clean the inner wall of the steel pipe. The hot pressing mechanism (8) includes a circular electric slide rail (81), a fourth electric slide rail (82), a support block (83), a heating module (84), a connecting frame (841), a contact rod (85), a hot pressing outer rod (86), and a heat-conducting rod (87). Multiple circular electric slide rails (81) are connected to the second mounting frame (21). The circular electric slide rails (81) and the processor are electrically connected through a control module. The sliders of the circular electric slide rails (81) are all connected to the fourth electric slide rails (82). The fourth electric slide rails (82) and the processor are electrically connected through a control module. The fourth electric slide rail (82) has a support block (83) connected to the slider. The second mounting bracket (21) has a heating module (84) connected to the upper middle part. The heating module (84) has a connecting bracket (841) connected to the right side. The connecting bracket (841) has multiple contact rods (85) connected to it. The contact rods (85) are all connected to the heating module (84) by wires. The support block (83) has a hot-pressing outer rod (86) connected to it. The hot-pressing outer rod (86) has a heat-conducting rod (87) connected inside it. The heat-conducting rod (87) is in contact with the adjacent contact rod (85).

2. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 1, characterized in that: The conveying components (31) consist of a conveyor belt for forward and backward conveying and two conveyor rollers for left and right conveying. The conveyor belt, conveyor rollers and processor are electrically connected through a control module.

3. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 1, characterized in that: The positioning components (4) are all composed of electric push rods, V-shaped positioning plates and infrared sensors. The electric push rods, infrared sensors and processors are electrically connected through the control module.

4. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 1, characterized in that: The tube-passing mechanism (5) includes a first electric slide rail (51), a guide rod (52), a first support frame (53), a conical arc plate (54), a cylinder (55), a conical clamp (56), a cooling module (57), a second electric slide rail (501), a wedge support frame (502), a hinge plate (503), and a pulley (504). Multiple first electric slide rails (51) are connected to the upper side of the first mounting frame (2). The first electric slide rails (51) and the processor are electrically connected through a control module. Guide rods (52) are connected to the sliders of the first electric slide rails (51). A first support frame (53) is connected to the left side of each guide rod (52). Multiple conical arc plates (54) are connected to the left side of each first support frame (53). A cylinder (55) is connected inside the first support frame (53). The cylinder (55) and the processor are electrically connected through a control module. A conical clamp (56) is connected to the telescopic end of the cylinder (55). The conical clamp (56) passes between the conical arc plates (54), and the inner side of each conical arc plate (54) is connected to a cooling module (57). The lower left side of each guide rod (52) is connected to a second electric slide rail (501). The second electric slide rail (501) and the processor are electrically connected through a control module. Each slider of the second electric slide rail (501) is connected to a wedge-shaped support frame (502). Each wedge-shaped support frame (502) is connected to the adjacent guide rod (52). The sliding connection is provided. Multiple hinge plates (503) are rotatably connected to the first support frame (53). The hinge plates (503) are in contact with the adjacent wedge support frame (502). The hinge plates (503) are rotatably connected to pulleys (504). The first electric slide rail (51) is started, and the guide rod (52) is pushed to the left, so that the guide rod (52) and the first support frame (53) pass through the steel pipe and push the conical arc plate (54) into the plastic pipe.

5. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 4, characterized in that: The cleaning mechanism (10) includes a mounting ring (101), an airbag (102), a cleaning brush (103), and an air inlet pipe (104). The mounting ring (101) is connected to the left side of the first support frame (53). The airbag (102) is connected to the mounting ring (101). The cleaning brush (103) is connected to the airbag (102). The air inlet pipe (104) is connected to the upper inner side of the airbag (102). The air inlet pipe (104) passes through the mounting ring (101) and connects to the first support frame (53). The air inlet pipe (104) is connected to an air pump. Before the pipe insertion operation, the airbag (102) is located inside the steel pipe. The air pump is started to inflate the airbag (102), so that when the pipe is inserted, the cleaning brush (103) moves along the inner wall of the steel pipe to clean the inner wall of the steel pipe.

6. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 4, characterized in that: It also includes a cutting mechanism (6), which includes a second support frame (61), an electric push rod (62) and a slant cutter (63). The second support frame (61) is connected to the left side of the first support frame (53). Multiple electric push rods (62) are connected to the second support frame (61). The electric push rods (62) and the processor are electrically connected through the control module. The slant cutter (63) is connected to the telescopic end of the electric push rods (62). When the electric push rods (62) on the second support frame (61) are started, the slant cutter (63) is pushed outward to cut the deformed part of the plastic tube. Then the conical arc plate (54) continues to move to the right so that the conical arc plate (54) can be separated from the plastic tube.

7. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 6, characterized in that: The bevel cutter (63) is tilted inward.

8. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 1, characterized in that: It also includes a pipe cutting mechanism (7), which includes a third electric slide rail (71), a motor (72) and a saw blade (73). The third electric slide rail (71) is connected to the upper left side of the first mounting bracket (2). The third electric slide rail (71) and the processor are electrically connected through a control module. The motor (72) is connected to the slider of the third electric slide rail (71). The motor (72) and the processor are electrically connected through a control module. The saw blade (73) is connected to the output shaft of the motor (72). The third electric slide rail (71) and the motor (72) are started, so that the saw blade (73) moves to the deformed part of the plastic pipe and cuts it off.

9. The automatic pipe threading device for heating and composite plastic-lined composite pipes according to claim 1, characterized in that: It also includes a spraying mechanism (9), which includes a storage tank (91), a delivery pipe (92), an electric pump (93), a spray nozzle (94), a high-temperature resistant rubber sheet (95), a spray plate (96), and a mounting base (97). The storage tank (91) is connected to the upper part of the middle of the connecting frame (841), and the delivery pipe (92) is connected to the right side of the storage tank (91). Multiple electric pumps (93) are connected to the lower side of the delivery pipe (92). The electric pumps (93) and the processor are electrically connected through a control module. Each electric pump (93) is connected to a spray nozzle (94) at its lower side. The lower side of the connecting frame (841) is connected to multiple mounting seats (97). The electric pump (93) is connected to the adjacent mounting seat (97). The lower sides of the front and rear parts of the mounting seat (97) are connected to high temperature resistant rubber plates (95). The inner side of the high temperature resistant rubber plates (95) is connected to spray plates (96). The spray plates (96) are connected to the adjacent spray pipes (94). When the electric pump (93) is started, the release agent is delivered to the spray plate (96) through the delivery pipe (92) and the spray pipe (94), so that the spray plate (96) sprays the release agent onto the hot-pressed outer rod (86).

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