Plastic pipe welding device

Abstract

The present application relates to the technical field of plastic pipe welding, and specifically discloses a plastic pipe welding device, which includes a base, a bracket fixed on the base, a positioning mechanism for fixing the pipe, and a heating mechanism for heating the end of the pipe; the bracket is also provided with a detection mechanism for detecting whether the end of the pipe is in a viscous flow state, a squeezing mechanism for ensuring that the two pipes are firmly connected, and a viewing mechanism for detecting the sealing of the connection position of the two pipes; the detection mechanism includes two detection needles respectively arranged at the ends of the two pipes, a reset component for resetting the detection needle, and a trigger component for marking the triggering of the detection needle. When the detection needle is reset, the end of the pipe is in a viscous flow state, and the detection needle pierces the position of the pipe to be connected. The present application has the effect of ensuring that the pipe is heated to a viscous fluid state, and improves the quality of plastic pipe welding work.

Description

Technical Field

[0001] The present application relates to the technical field of plastic pipe welding, and in particular to a plastic pipe welding device. Background Art

[0002] At present, plastic welding refers to a connection method that uses a heating method to melt the contact surfaces of two plastic parts at the same time, so that they are combined into a whole. At present, the welding between the pipe mouths of plastic pipes mostly adopts the method of hot-melt butt welding of plastic pipes. After the welding interface of the two plastic pipes is heated to a viscous state with a heating plate, the heating plate is removed; then the two plastic pipes are manually pressed against each other, and cooled and solidified under this pressure state to form a firm connection; during the process of manual pressure application, if the welding circular holes on the two plastic pipes cannot be accurately positioned, it will cause welding failure and result in defective products. Secondly, the welding equipment in the prior art cannot achieve both welding quality and welding efficiency at the same time. After the welding is completed, in order to continue the welding of the next pipe, the pipe that has been welded will be manually removed, but this often leads to welding quality problems. Since the welding point of the welded pipe has not been completely cooled naturally, it cannot be subjected to various external forces. Therefore, during the process of moving after the welding is completed, stress changes often occur at the welding position, which in turn causes welding quality problems.

[0003] In the related art, a Chinese patent with publication number CN115008757A proposes a plastic pipe welding device with high welding accuracy, including a turntable, the circumference of which is evenly distributed with a number of through circular grooves, a clamping block rotatably arranged in the circular groove, and a V-shaped material receiving groove arranged on the clamping block; at least four turntables are arranged at intervals on the rotating shaft, and the two middle turntables are connected by a number of mounting blocks evenly distributed along the circumference of the turntable; it also includes four semicircular groove-shaped pressure blocks, each mounting block is fixed with a two-way cylinder, and the two ends of the two-way cylinder are respectively connected with pressure blocks; the pressure blocks can be plugged into each other in pairs; the hot melt block is arranged on the center line of the two circular grooves. The above technical scheme provides a plastic pipe welding device with high welding accuracy, which can weld multiple pipes in sequence and quickly, and can remove the welded pipes smoothly, thereby ensuring the efficiency and quality of pipe welding.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: when welding the pipe, the end of the pipe to be welded needs to be heated to a viscous state in order to complete the welding of the plastic pipe. However, there is currently no detection of whether the end of the plastic pipe meets the connection standards, which may easily lead to poor subsequent plastic pipe welding results. Summary of the invention

[0005] In order to improve the problem of poor subsequent plastic pipe welding results due to failure to detect whether the ends of the plastic pipe meet the connection standards, the present application provides a plastic pipe welding device.

[0006] The present application provides a plastic pipe welding device that adopts the following technical solution:

[0007] A plastic pipe welding device comprises a base, a bracket fixed on the base, a positioning mechanism for fixing the pipe, and a heating mechanism for heating the end of the pipe;

[0008] The bracket is also provided with a detection mechanism for detecting whether the end of the pipeline is in a viscous flow state, a squeezing mechanism for ensuring that the two pipelines are firmly connected, and a viewing mechanism for detecting the sealing of the connection position of the two pipelines;

[0009] The detection mechanism includes two detection needles respectively arranged at the two ends of the pipeline, a reset component for realizing the reset of the detection needle, and a trigger component for marking the triggering of the detection needle. When the detection needle is reset, the end of the pipeline is in a viscous flow state, and the detection needle penetrates into the position of the pipeline to be connected.

[0010] Optionally, the reset assembly includes a reset rod, a reset rope, a reset roller, a tension sensor and a coil spring for returning the reset roller to its original position, the reset rod is hollow inside and both ends of the reset rod are open, the reset roller rotates on the bracket and is located at one end of the reset rod, one end of the reset rope is fixedly connected to the peripheral wall of the reset roller, the other end of the reset rope is fixedly connected to the end of the detection needle away from the pipeline, the reset rope is provided in two sections and the tension sensor is used to connect the two sections of the reset rope, the tension sensor controls the operation of the extrusion mechanism, the reset rod is staggered with the extrusion mechanism, and the reset rope moves from the reset rod toward one side of the pipeline.

[0011] Optionally, the positioning mechanism includes two support frames slidably arranged on the bracket, two driving members for driving the support frames to slide, and two positioning blocks, wherein the positioning blocks are fixed on the support frames and adapted to the pipeline;

[0012] The extrusion mechanism includes an extrusion ring elastically arranged on the positioning block, a cooling ring elastically arranged on another positioning block, two elastic components and a cooling component for cooling the pipe connection position; the viewing mechanism is arranged on the cooling ring; the outer wall of the pipe fits with the extrusion ring or the inner wall of the cooling ring; the end of the extrusion ring after popping out is flush with the corresponding end of the pipe; the cooling ring wraps the corresponding end of the pipe after popping out; the two elastic components are respectively used to realize the elastic reset of the extrusion ring and the positioning block and the cooling ring and the corresponding positioning block; the tension sensor controls the operation of the elastic component.

[0013] Optionally, the elastic component includes a slip ring, an electromagnet, an elastic plate and a power part, an annular groove is arranged inside the positioning block, the slip ring is elastically arranged in the groove, the slip ring is fixedly connected to the end of the extrusion ring or the cooling ring, and the slip ring and the extrusion ring or the cooling ring are arranged in steps, the extrusion ring and the inner wall of the cooling ring are fitted with the corresponding pipeline, the power part is fixed on the positioning block, the output end of the power part is fixedly connected to the electromagnet, the elastic plate is fixedly connected to the outer wall of the cooling ring or the extrusion ring, the electromagnet is adsorbed on the corresponding elastic plate, and the tension sensor controls the operation of the corresponding electromagnet.

[0014] Optionally, the trigger assembly includes two baffles elastically arranged on the reset rod, an infrared transmitter and an infrared receiver; the reset rod is provided with two through holes for sliding of the baffles, the baffle moves in the through holes and the movement direction is horizontally arranged, the baffle is elastically arranged in the through hole and when the detection needle penetrates into the pipeline, the reset rope pushes the baffle into the through hole, the reset rod is provided with a through hole between the two through holes, the infrared transmitter and the infrared receiver are respectively installed on the reset rod near the inner walls of the two through holes, and the two baffles are located between the infrared transmitter and the infrared receiver, and after the two detection needles are separated from the pipeline, the infrared receiver receives the signal of the infrared transmitter and triggers the heating mechanism to move away from the pipeline.

[0015] Optionally, the cooling mechanism includes a water tank, a water pump, a water pipe, and an ice-making part. The water tank is fixed on the support frame, the water pump output end is connected to one end of the water pipe, the other end of the water pipe is connected to the cooling ring, and the ice-making part is used to accelerate the cooling ring to cool the two pipe connection positions.

[0016] Optionally, the ice-making part includes a temperature control tube, a liquid nitrogen tank filled with liquid nitrogen, an ice-making tube and an injection head connected to the liquid nitrogen tube, the temperature control tube is installed in the cooling ring, the bottom wall of the cooling ring circumferential wall is provided with a water outlet, a solenoid valve is installed on the water outlet, when the outer ring cover of the cooling ring is arranged at the connection position of two pipes, the bottom end of the water outlet is opposite to the ice-making tube, the injection head is arranged at an angle and aligned with the top end of the ice-making tube, the ice-making tube is arranged in the water tank, and the temperature control tube is filled with phase change material.

[0017] Optionally, the viewing mechanism includes a detection ring fixed on the outer wall of the cooling ring, a gas supply assembly for introducing inert gas into the pipeline, and a Tesla coil installed in the detection ring, the detection ring is made of transparent material, and the final position of the detection ring is located at the connection position of two pipelines.

[0018] Optionally, the positioning block is connected to an oil filling pipe, one end of which is connected to the slide groove, and the other end is connected to an oil supply assembly. High-temperature resistant adsorption parts are installed at the corners of the slip ring and the extrusion ring or the slip ring and the cooling ring, and the adsorption parts are used to apply lubricating oil between the cooling ring or the extrusion ring and the outer wall of the corresponding pipe.

[0019] Optionally, the air supply assembly includes two sealing plugs, a thin sheet, an air supply tank and an air supply pipe, one end of the air supply pipe is connected to the valve on the air supply pipe, and the other end passes through the sealing plug, the thin sheet is fixedly connected to the sealing plug and is located in the pipeline, the thin sheet and the air supply pipe are located in the same sealing plug, and the sealing plug is used to seal the opening of the pipeline.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. When the support frame is moved to a position close to the hot melt block, the reset rope passes through the reset rod and then bypasses the guide roller to pierce the plastic pipe to be heated. At this time, the coil spring is in a deformed state, and the reset rope is straightened. As the hot melt block continues to heat the end of the plastic pipe, when the end of the plastic pipe is in a viscous flow state, the connection between the detection needle and the plastic pipe is loosened until it is separated. Under the action of the coil spring restoring its original shape, the reset roller pulls the detection needle to separate from the plastic pipe. At this time, the reset rope is in a relaxed state; the tension sensor is not subjected to tension. At this time, the tension sensor controls the corresponding electric push rod through the PLC controller to pull back the support frame, so that the support frame is separated from the hot melt block;

[0022] 2. First, the water pump pumps the water in the water tank into the cooling pipe, the solenoid valve is closed, and the temperature control pipe starts to emit heat after encountering water, and the water in the cooling ring starts to heat up. At this time, the drain port is immediately opened to allow water to enter the ice-making pipe. Since liquid nitrogen makes ice faster when encountering hot water, in this implementation, part of the water in the cooling ring is first heated by the temperature control pipe, and then the ice cubes in the ice-making pipe and the water in the water tank are fully heat-transferred and pumped into the cooling ring to accelerate the cooling of the pipe connection position; the inert gas in the gas supply tank is pumped into the pipe, and the thin sheet makes a sound, proving that the ventilation is normal, and then the Tesla line is controlled to be energized. The high-frequency electric field generated by the energized Tesla coil will excite the atoms or molecules in the inert gas, causing electron transitions and emitting light. By observing whether there is a luminous phenomenon in the detection ring, it can be proved whether the sealing of the pipe connection position meets the standard;

[0023] 3. When the reset rope is in a relaxed state, the electromagnet is powered off and separated from the elastic plate. Under the elastic force of the spring to restore its original shape, the slip ring is driven to move outside the slide groove, and the extrusion ring moves to a position flush with the corresponding pipe end, thereby avoiding deformation of the pipe end. At this time, the cooling ring completely wraps the pipe end, which can also achieve the effect of protecting the pipe. At this time, the two support frames are controlled to move closer to each other; after the detection needle and the pipe are separated, the reset rope is in a relaxed state, and the baffle moves downward under the action of the spring. At this time, the infrared receiver receives the signal from the infrared reflector and triggers the heating mechanism to move away from the pipe, that is, the infrared receiver triggers the corresponding electric push rod to move, and the electric push rod moves the hot melt block away from the pipe, which is convenient for the subsequent pipes to be squeezed and connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0025] Figure 2 It is a partial structural diagram of the squeezing mechanism and the viewing mechanism in the embodiment of the present application;

[0026] Figure 3 is a top view of the detection mechanism in the embodiment of the present application;

[0027] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0028] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0029] Figure numerals: 1, base; 2, bracket; 3, hot melt block; 4, detection needle; 5, reset rod; 6, reset rope; 7, reset roller; 8, tension sensor; 9, support frame; 10, positioning block; 11, driving member; 12, extrusion ring; 13, cooling ring; 14, slip ring; 15, electromagnet; 16, elastic plate; 17, power member; 18, slide groove; 19, baffle; 20, infrared transmitter; 21, infrared receiver; 22, Perforation; 23. Through hole; 24. Water tank; 25. Water pump; 26. Water pipe; 27. Temperature control pipe; 28. Liquid nitrogen tank; 29. ​​Ice making pipe; 30. Injection head; 31. Solenoid valve; 32. Detection ring; 33. Tesla coil; 34. Oil filling pipe; 35. Adsorbent; 36. Sealing plug; 37. Thin sheet; 38. Air supply tank; 39. Air supply pipe; 40. Limit block; 41. Limit groove; 42. Guide roller; 43. Water outlet. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The present application embodiment discloses a plastic pipe welding device. Figure 1 and Figure 2 A plastic pipe welding device includes a base 1, a bracket 2 fixed on the base 1, a positioning mechanism for fixing the pipe and a heating mechanism for heating the end of the pipe; the positioning mechanism includes two support frames 9 slidably arranged on the bracket 2, two driving members 11 for driving the support frames 9 to slide, and two positioning blocks 10, the positioning blocks 10 are fixed on the support frames 9 and adapted to the pipes, and the driving of the two support frames 9 is also achieved by an electric push rod or a cylinder; the positioning block 10 is provided with a positioning hole adapted to the pipe, and in this embodiment, in order to facilitate the positioning and fixing of the pipe, the positioning block 10 adopts two adapted arc blocks, and the arc block located at the bottom is fixed to the support frame 9 The connection is that the arc block located at the top is lifted and set on the support frame 9, and the arc block at the top is realized by an electric push rod, that is, the pipe to be connected is placed in the arc block at the bottom, and then the arc block at the top is controlled to move to adapt to the arc block at the bottom. At this time, the pipe is squeezed and fixed on the positioning block 10. The heating mechanism includes a hot melt block 3 and a reciprocating part for controlling the hot melt block 3 to move in the vertical direction. The reciprocating part can be an electric push rod or a cylinder. The hot melt block 3 is used to heat the end of the plastic pipe until it is in a viscous state, and then after removing the hot melt block 3, the two positioning blocks 10 are gradually brought closer until the two plastic pipes are connected together. After the plastic pipe connection position is cooled, the plastic pipe welding work is completed.

[0032] Reference Figure 1 and Figure 3The bracket 2 is also provided with a detection mechanism for detecting whether the end of the pipe is in a viscous flow state, a squeezing mechanism for ensuring that the two pipes are firmly connected, and a viewing mechanism for detecting the sealing of the connection position of the two pipes; the detection mechanism includes two detection needles 4 respectively arranged at the two ends of the pipe, a reset component for resetting the detection needle 4, and a trigger component for identifying the triggering of the detection needle 4. In this embodiment, the detection needle 4 is made of steel material to ensure that the detection needle 4 has high temperature resistance. The tip of the detection needle 4 is inserted into the end of the pipe by external force, that is, the detection needle 4 is inserted into the position of the pipe to be heated. If the end position of the pipe is in a viscous flow state, the detection needle 4 returns to the initial position under the action of the reset component. At this time, the trigger component allows the staff to recognize that the plastic pipe has been heated, and then the two plastic pipe ends can be pushed together.

[0033] Reference Figure 1 and Figure 3 The reset assembly includes a reset rod 5 fixed on the bracket 2, a reset rope 6, a reset roller 7, a tension sensor 8 and a coil spring for realizing the return of the reset roller 7. The reset rod 5 is hollow inside and both ends of the reset rod 5 are open. The reset rod 5 is staggered with the hot melt block 3. The peripheral wall of the reset rod 5 is fixedly connected to the bracket 2. The length direction of the reset rod 5 is set along the movement direction of the positioning block 10. The reset roller 7 is rotatably set on the bracket 2, and the central axis of the reset roller 7 is perpendicular to the movement direction of the support frame 9. The reset roller 7 is located at one end of the reset rod 5, and one end of the reset rope 6 is fixedly connected to the peripheral wall of the reset roller 7. The reset rope 6 and the reset roller 7 are fixed by bolts. The other end of the reset rope 6 is fixedly connected to the end of the detection needle 4 away from the pipe. In order to ensure that the detection needle 4 can easily penetrate into the plastic pipe in this embodiment, a guide roller 42 is installed at the reset rod 5 near the detection needle 4. The axial direction of the guide roller 42 is perpendicular to the axial direction of the reset roller 7. The reset rope 6 is fixedly connected to the detection needle 4 after passing around the guide roller 42. The detection needle 4 is preferably inserted vertically into the plastic pipe in this embodiment. Of course, the angle between the detection needle 4 and the plastic pipe can also be 0-90°. The reset rope 6 is set to two sections. The tension sensor 8 is used to connect the two sections of the reset rope 6. The tension sensor 8 is used to control the operation of the extrusion mechanism.

[0034] The two ends of the coil spring are fixedly connected to the rotating shaft of the reset roller 7 and the bracket 2 respectively. When the support frame 9 is moved to a position close to the hot melt block 3, the reset rope 6 moves from the side of the reset rod 5 close to the pipe and bypasses the guide roller 42 to penetrate into the plastic pipe to be heated. At this time, the coil spring is in a deformed state, and the reset rope 6 is straightened. As the hot melt block 3 continues to heat the end of the plastic pipe, when the end of the plastic pipe is in a viscous flow state, the connection between the detection needle 4 and the plastic pipe is loosened until it is separated. Under the action of the coil spring restoring its original shape, the reset roller 7 pulls the detection needle 4 to separate from the plastic pipe. At this time, the reset rope 6 is in a relaxed state; in this embodiment, the tension sensor 8 controls the movement of the support frame 9. When the reset rope 6 is in a straightened state, the tension sensor 8 receives the tension of the reset rope 6, and when the reset rope 6 is in a relaxed state, the tension sensor 8 is not subjected to tension. At this time, the tension sensor 8 controls the driving member 11 through the PLC controller to pull back the support frame 9, so that the support frame 9 is separated from the hot melt block 3.

[0035] Reference Figure 2 and Figure 3 The extrusion mechanism includes an extrusion ring 12 elastically arranged on the positioning block 10, a cooling ring 13 elastically arranged on another positioning block 10, two elastic components and a cooling component for cooling the pipe connection position. The inspection mechanism is arranged on the cooling ring 13, and the outer wall of the pipe fits with the inner wall of the extrusion ring 12 or the cooling ring 13, that is, the two pipes fit with the inner walls of the extrusion ring 12 and the cooling ring 13 respectively. The extrusion ring 12 and the cooling ring 13 in this embodiment can also be composed of two half rings or an integral structure, and the two half rings are fixed by bolts to facilitate the placement of the pipe; the extrusion ring and the cooling ring 13 leak out at the initial position of the corresponding pipe end, and the end of the extrusion ring 12 after popping out is flush with the corresponding pipe end. The cooling ring 13 wraps the corresponding pipe after popping out, and when the two pipes are docked, the cooling ring 13 wraps the connection position of the two pipes, and it is necessary to ensure that the inspection component is finally located at the connection position of the two pipes, so as to facilitate the detection of whether the pipe connection position is sealed.

[0036] The two elastic components are respectively used to achieve the effect of elastic reset of the extrusion ring and the positioning ring, and the cooling ring 13 and the other positioning block 10. The tension sensor 8 controls the operation of the elastic component. The elastic component includes a slip ring 14, an electromagnet 15, an elastic plate 16 and a power piece 17. An annular slide groove 18 is arranged inside the positioning block 10. The slip ring 14 is elastically arranged in the slide groove 18. The end of the slide groove 18 close to the extrusion ring 12 or the cooling ring 13 is open. The two slip rings 14 are respectively fixedly connected to the end of the extrusion ring 12 or the cooling ring 13. Since the slide groove 18 is not arranged in the inner cavity of the positioning block 10, there is a distance between the slide groove 18 and the inner wall of the pipeline. Therefore, the slip ring 14 and the extrusion ring 12 or the cooling ring 13 are arranged in steps, which is convenient for To ensure that the extrusion ring 12 or the cooling ring 13 fits the pipeline, the positioning block 10 is fixedly connected with multiple springs in the slide groove 18, and the multiple springs are symmetrically arranged with respect to the central axis of the slip ring 14. The other end of the spring is fixedly connected to the end of the slip ring 14, thereby realizing the elastic movement of the slip ring 14 in the slide groove 18; the power member 17 is fixed on the positioning block 10, and the power member 17 can be an electric push rod or a cylinder. The output end of the power member 17 is fixedly connected to the electromagnet 15, and the elastic plate 16 is fixedly connected to the outer wall of the cooling ring 13 or the extrusion ring 12. The electromagnet 15 is adsorbed with the corresponding elastic plate 16, and the tension sensor 8 controls the corresponding electromagnet 15 to work, and the tension sensor 8 and the electromagnet 15 are controlled and connected through a PLC controller. When the reset rope 6 is in a relaxed state, the electromagnet 15 is powered off and separated from the elastic plate 16. At this time, under the elastic force of the spring restoring its original shape, the slip ring 14 is driven to move toward the outside of the slide groove 18, and the extrusion ring 12 moves to a position flush with the corresponding pipe end, thereby avoiding deformation of the pipe end. At this time, the cooling ring 13 completely wraps the pipe end, and the effect of protecting the pipe can also be achieved. At this time, by controlling the two support frames 9 to move closer to each other, the hot melt block 3 is removed, and the two pipe ends abut against each other. At this time, the power piece 17 on the cooling ring 13 is moved to fit with the elastic plate 16, and the elastic plate 16 is continued to be driven to move toward the extrusion ring 12, and the extrusion ring 12 moves away from the corresponding pipe end until the cooling ring 13 completely wraps the pipe connection position. At this time, the two pipes begin to connect under the thrust of the two support frames 9.

[0037] Reference Figure 3 , Figure 4 and Figure 5The trigger assembly includes two baffles 19 elastically arranged on the reset rod 5, an infrared transmitter 20 and an infrared receiver 21; the reset rod 5 is provided with two through holes 22 for the baffle 19 to slide, the baffle 19 moves in the through holes 22 and the movement direction is horizontal, the baffle 19 is elastically arranged in the through hole 22, the side wall of the baffle 19 is fixedly connected with a limiting block 40, the side wall of the through hole 22 is provided with a limiting groove 41, the two ends of the limiting groove 41 are closed, the limiting block 40 slides in the limiting groove 41, and a limiting spring is fixedly connected between any end of the limiting block 40 and the inner wall of the corresponding end of the limiting groove 41, thereby realizing the elastic movement of the baffle 19 in the through hole 22. When the detection needle 4 penetrates into the pipeline, the reset rope 6 pushes the baffle 19 into the through hole 22. At this time, the spring is in a compressed state, and the elastic force of the torsion spring is much greater than the elastic force of the limiting spring, so it can be ensured that the baffle 19 is located in the through hole 22 In the reset rod 5, an infrared transmitter 20 and an infrared receiver 21 are respectively installed at positions close to the inner walls of the two perforations 22 of the reset rod 5. A through hole 23 is set between the two perforations 22 of the reset rod 5. The through hole 23 is used to connect the two perforations 22. Two baffles 19 are located between the infrared transmitter 20 and the infrared receiver 21, that is, when the two baffles 19 are in the perforations 22, the signals of the infrared transmitter 20 and the infrared receiver 21 are blocked. The electric push rod connected to the infrared receiver 21 and the hot melt block 3 is controlled and connected through a PLC controller. After the detection needle 4 is separated from the pipeline, the reset rope 6 is in a relaxed state, and the baffle 19 moves downward under the action of the spring. At this time, the infrared receiver 21 receives the signal from the infrared reflector and triggers the heating mechanism to move away from the pipeline, that is, the infrared receiver 21 triggers the corresponding electric push rod to move, and the electric push rod moves the hot melt block 3 away from the pipeline, which is convenient for the subsequent pipelines to be squeezed and connected with each other.

[0038] Reference Figure 2 and Figure 3, when the pipeline is extruded and connected, it is necessary to control the cooling mechanism to cool the cooling ring 13, so as to accelerate the working efficiency of the pipeline connection. The cooling mechanism includes a water tank 24, a water pump 25, a water pipe 26, and an ice-making unit. The water tank 24 is fixed on a support frame 9 corresponding to the cooling ring 13. The output end of the water pump 25 is connected to one end of the water pipe 26, and the other end of the water pipe 26 is connected to the cooling ring 13. The ice-making unit is used to accelerate the cooling of the two pipeline connection positions by the cooling ring 13. The water pump 25 is installed in the water tank 24. The ice-making unit includes a temperature control tube 27, a liquid nitrogen tank 28 filled with liquid nitrogen, an ice-making tube 29 and an injection head 30 connected to the liquid nitrogen tube. The temperature control tube 27 is installed in the cooling ring 13. The temperature control tube 27 is filled with a phase change material. The phase change material can absorb and release heat. The temperature control tube 27 is installed in the cooling ring 13. In the process of welding the hot melt block 3 to the end of the pipeline, due to the high temperature of the hot melt block 3 and Combined with the high temperature at the initial state of the pipe connection position, the phase change material begins to absorb heat, a water outlet is provided on the bottom wall of the peripheral wall of the cooling ring 13, and a solenoid valve 31 is installed on the water outlet 43. When the outer ring cover of the cooling ring 13 is arranged at the connection position of the two pipes, the bottom end of the water outlet 43 is directly opposite to the ice-making pipe 29, and the injection head 30 is inclined and aligned with the top of the ice-making pipe 29. The ice-making pipe 29 is arranged in the water tank 24; first, the water pump 25 pumps the water in the water tank 24 into the cooling pipe, and the solenoid valve 31 is closed. The temperature control pipe 27 starts to emit heat after encountering the water, and the water in the cooling ring 13 starts to heat up. At this time, the water outlet 43 is immediately opened to allow water to enter the ice-making pipe 29. Since liquid nitrogen meets hot water to make ice faster, in this embodiment, the water in the cooling ring 13 is first heated by the temperature control pipe 27, and then the ice cubes in the ice-making pipe 29 and the water in the water tank 24 are fully heat-transferred and then pumped into the cooling ring 13 to accelerate the cooling of the pipe connection position.

[0039] Reference Figure 1 and Figure 2During the cooling process of the pipeline connection position, the viewing mechanism can be moved away from the connection position until the cooling work is completed, and then the cooling ring 13 is controlled to move the viewing mechanism to the connection position. The viewing mechanism includes a detection ring 32 fixed on the outer wall of the cooling ring 13, a gas supply component for introducing inert gas into the pipeline, and a Tesla coil 33 installed in the detection ring 32. The detection ring 32 is open on the side facing the pipeline. The detection ring 32 surrounds the pipeline connection position and surrounds it in a circle. The detection ring 32 is made of transparent material. The final position of the detection ring 32 is located at the connection position of the two pipelines. The gas supply component includes two sealing plugs 36, a thin sheet 37, a gas supply tank 38 and a gas supply pipe 39. One end of the gas supply pipe 39 is connected to the valve on the gas supply pipe 39, and the other end passes through the sealing plug 36. The thin sheet 37 is selected in this embodiment. Any material that is easy to make sound, such as thin paper sheets, thin iron sheets or thin aluminum sheets, can be used. The thin sheet 37 and the gas supply pipe 39 are located in the same sealing plug 36. The sealing plug 36 is used to seal the opening of the pipeline. The gas supply tank 38 is placed in the external environment. The two sealing plugs 36 are sealed at the two ends of the two pipelines after they are connected. At this time, the thin sheet 37 is also located in the pipeline. The inert gas in the gas supply tank 38 is pumped into the pipeline, and the thin sheet 37 makes a sound, proving that the ventilation is normal. Then the Tesla wire is controlled to be energized. The high-frequency electric field generated by the energized Tesla coil 33 will excite the atoms or molecules in the inert gas, causing electron transitions and emitting light. By observing whether there is a luminous phenomenon in the detection ring 32, it can be proved whether the sealing of the pipeline connection position meets the standard. Of course, different inert gases emit different colors, which is convenient for staff to observe.

[0040] The positioning block 10 is connected to an oil injection pipe 34, one end of which is connected to the slide groove 18, and the other end is connected to an oil supply assembly. The corner positions of the slip ring 14 and the extrusion ring 12 or the slip ring 14 and the cooling ring 13 are all equipped with high-temperature resistant adsorption members 35, and the adsorption members 35 are used to apply lubricating oil between the cooling ring 13 or the extrusion ring 12 and the outer wall of the corresponding pipeline. The oil supply assembly includes an oil tank and an oil pump, and the oil tank is arranged in the external environment, and the oil pump is installed in the oil tank. The oil pump draws the lubricating oil in the oil tank into the slide groove 18 in the extrusion ring 12 or the cooling ring 13. At this time, the power member 17 can be controlled to reciprocate and drive the cooling ring 13 or the extrusion ring 12 to reciprocate. At this time, the corresponding slip ring 14 drives the lubricating oil to flow between the extrusion ring 12 and the plastic pipe during the reciprocating motion. Of course, the main purpose of the lubricating oil selected in this embodiment is to avoid the large friction between the extrusion ring 12 or the cooling ring 13 and the pipeline to affect the subsequent operation, and will not affect the subsequent cooling ring 13 to cool the pipeline.

[0041] The implementation principle of a plastic pipe welding device in an embodiment of the present application is as follows: when the support frame 9 is moved to a position close to the hot melt block 3, the reset rope 6 passes through the reset rod 5 and then bypasses the guide roller 42 to penetrate into the plastic pipe to be heated. At this time, the coil spring is in a deformed state, and the reset rope 6 is straightened. As the hot melt block 3 continues to heat the end of the plastic pipe, when the end of the plastic pipe is in a viscous flow state, the connection between the detection needle 4 and the plastic pipe is loosened until it is separated. Under the action of the coil spring restoring its original shape, the reset roller 7 pulls the detection needle 4 to separate from the plastic pipe. At this time, the reset rope 6 is in a relaxed state; the tension sensor 8 is not subjected to tension. At this time, the tension sensor 8 controls the corresponding electric push rod through the PLC controller to pull back the support frame 9, so that the support frame 9 is separated from the hot melt block 3.

[0042] When the reset rope 6 is in a relaxed state, the electromagnet 15 is powered off and separated from the elastic plate 16. Under the elastic force of the spring restoring its original shape, the slip ring 14 is driven to move toward the outside of the slide groove 18, and the extrusion ring 12 moves to a position flush with the corresponding pipe end, thereby avoiding deformation of the pipe end. At this time, the cooling ring 13 completely wraps the pipe end, and the effect of protecting the pipe can also be achieved. At this time, the two support frames 9 are controlled to move closer to each other; after the detection needle 4 is separated from the pipe, the reset rope 6 is in a relaxed state, and the baffle 19 moves downward under the action of the spring. At this time, the infrared receiver 21 receives the signal from the infrared reflector and triggers the heating mechanism to move away from the pipe, that is, the infrared receiver 21 triggers the corresponding electric push rod to move, and the electric push rod moves the hot melt block 3 away from the pipe, which is convenient for the subsequent pipes to be squeezed and connected with each other.

[0043] First, the water pump 25 pumps the water in the water tank 24 into the cooling pipe, the solenoid valve 31 is closed, and the temperature control pipe 27 starts to emit heat after encountering water, and the water in the cooling ring 13 starts to heat up. At this time, the water outlet 43 is immediately opened to allow water to enter the ice-making pipe 29. Since liquid nitrogen makes ice faster when encountering hot water, in this embodiment, the temperature control pipe 27 is used to heat the water in the cooling ring 13 first, and then the ice cubes in the ice-making pipe 29 and the water in the water tank 24 are fully heat-transferred and pumped into the cooling ring 13 to accelerate the cooling of the pipe connection position. The inert gas in the gas supply tank 38 is pumped into the pipe, and the thin sheet 37 makes a sound, which proves that the ventilation is normal. Then the Tesla line is controlled to be energized. The high-frequency electric field generated by the energized Tesla coil 33 will excite the atoms or molecules in the inert gas, causing electron transition and emitting light. By observing whether there is a luminous phenomenon in the detection ring 32, it can be proved whether the sealing of the pipe connection position meets the standard.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic pipe welding device, characterized in that: It comprises a base (1), a bracket (2) fixed on the base (1), a positioning mechanism for fixing the pipeline, and a heating mechanism for heating the end of the pipeline; The support (2) is also provided with a detection mechanism for detecting whether the end of the pipeline is in a viscous flow state, a squeezing mechanism for ensuring that the two pipelines are firmly connected, and a viewing mechanism for detecting the sealing of the connection position of the two pipelines; The detection mechanism comprises two detection needles (4) respectively arranged at two ends of the pipeline, a reset component for realizing the reset of the detection needle (4) and a trigger component for marking the triggering of the detection needle (4); when the detection needle (4) is reset, the end of the pipeline is in a viscous flow state, and the detection needle (4) pierces the pipeline to be connected; the reset component comprises a reset rod (5) fixed on the bracket (2), a reset rope (6), a reset roller (7), a tension sensor (8) and a coil spring for realizing the return of the reset roller (7); the reset rod (5) is hollow inside and both ends of the reset rod (5) are open; the reset roller (7) rotates on the bracket (2) and is located at one end of the reset rod (5); the reset rope (6) One end of the reset rope (6) is fixedly connected to the peripheral wall of the reset roller (7), the other end of the reset rope (6) is fixedly connected to the end of the detection needle (4) away from the pipeline, the reset rope (6) is arranged in two sections and the tension sensor (8) is used to connect the two sections of the reset rope (6), the tension sensor (8) controls the operation of the extrusion mechanism, the reset rod (5) and the extrusion mechanism are arranged in a staggered manner, and the reset rope (6) moves from the reset rod (5) toward one side of the pipeline; the positioning mechanism comprises two support frames (9) slidably arranged on the bracket (2), two driving members (11) for driving the support frames (9) to slide, and two positioning blocks (10), the positioning blocks (10) are fixed on the support frames (9) and adapted to the pipeline; The extrusion mechanism comprises an extrusion ring (12) elastically arranged on the positioning block (10), a cooling ring (13) elastically arranged on another positioning block (10), two elastic components and a cooling component for cooling the pipe connection position; the viewing mechanism is arranged on the cooling ring (13); the outer wall of the pipe is in contact with the extrusion ring (12) or the inner wall of the cooling ring (13); the end of the extrusion ring (12) after it pops out is flush with the corresponding end of the pipe; the cooling ring (13) wraps the corresponding end of the pipe after it pops out; the two elastic components are respectively used to realize the elastic reset of the extrusion ring (12) and the positioning block (10) and the cooling ring (13) and the corresponding positioning block (10); the tension sensor (8) controls the operation of the elastic component; the elastic component comprises a slip ring (14), an electromagnet (15), an elastic plate (16) and a and a power member (17), wherein an annular slide groove (18) is arranged inside the positioning block (10), the slip ring (14) is elastically arranged in the slide groove (18), the slip ring (14) is fixedly connected to the end of the extrusion ring (12) or the cooling ring (13), and the slip ring (14) and the extrusion ring (12) or the cooling ring (13) are arranged in a step manner, the inner walls of the extrusion ring (12) and the cooling ring (13) are in contact with the corresponding pipeline, the power member (17) is fixed on the positioning block (10), the output end of the power member (17) is fixedly connected to the electromagnet (15), the elastic plate (16) is fixedly connected to the outer wall of the cooling ring (13) or the extrusion ring (12), the electromagnet (15) is adsorbed by the corresponding elastic plate (16), and the tension sensor (8) controls the corresponding electromagnet (15) to work.

2. A plastic pipe welding device according to claim 1, characterized in that: The trigger assembly comprises two baffles (19) elastically arranged on the reset rod (5), an infrared transmitter (20) and an infrared receiver (21); the reset rod (5) is provided with two through holes (22) for the baffles (19) to slide, the baffles (19) move in the through holes (22), the baffles (19) are elastically arranged in the through holes (22) and when the detection needle (4) pierces the pipeline, the reset rope (6) pushes the baffles (19) into the through holes (22), and the reset rod ( 5) A through hole (23) is provided between the two through holes (22); the infrared transmitter (20) and the infrared receiver (21) are respectively installed at positions of the reset rod (5) close to the inner walls of the two through holes (22); and the two blocking pieces (19) are located between the infrared transmitter (20) and the infrared receiver (21); after the two detection needles (4) are separated from the pipeline, the infrared receiver (21) receives the signal of the infrared transmitter (20) and triggers the heating mechanism to move away from the pipeline.

3. A plastic pipe welding device according to claim 2, characterized in that: The cooling assembly comprises a water tank (24), a water pump (25), a water pipe (26), and an ice-making unit; the water tank (24) is fixed on the support frame (9); the output end of the water pump (25) is connected to one end of the water pipe (26); the other end of the water pipe (26) is connected to the cooling ring (13); and the ice-making unit is used to accelerate the cooling of the two pipe connection positions by the cooling ring (13).

4. A plastic pipe welding device according to claim 3, characterized in that: The ice-making part comprises a temperature control tube (27), a liquid nitrogen tank (28) filled with liquid nitrogen, an ice-making tube (29), and an injection head (30) connected to the liquid nitrogen tank (28); the temperature control tube (27) is installed in the cooling ring (13); a water outlet (43) is provided on the bottom wall of the peripheral wall of the cooling ring (13); a solenoid valve (31) is installed on the water outlet (43); when the outer ring cover of the cooling ring (13) is arranged at the connection position of two pipes, the bottom end of the water outlet (43) faces the ice-making tube (29); the injection head (30) is arranged obliquely and aligned with the top end of the ice-making tube (29); the ice-making tube (29) is arranged in the water tank (24); and the temperature control tube (27) is filled with phase change material.

5. A plastic pipe welding device according to claim 4, characterized in that: The viewing mechanism comprises a detection ring (32) fixed to the outer wall of the cooling ring (13), a gas supply assembly for introducing an inert gas into the pipeline, and a Tesla coil (33) installed in the detection ring (32); the detection ring (32) is made of a transparent material, and the final position of the detection ring (32) is located at the connection position of two pipelines.

6. A plastic pipe welding device according to claim 5, characterized in that: The positioning block (10) is connected to an oil injection pipe (34), one end of which is connected to the slide groove (18), and the other end of which is connected to an oil supply assembly. A high-temperature resistant adsorption component (35) is installed at a corner between the slip ring (14) and the extrusion ring (12) or the slip ring (14) and the cooling ring (13). The adsorption component (35) is used to apply lubricating oil between the cooling ring (13) or the extrusion ring (12) and the outer wall of the corresponding pipeline.

7. A plastic pipe welding device according to claim 6, characterized in that: The air supply assembly comprises two sealing plugs (36), a thin sheet (37), an air supply tank (38) and an air supply pipe (39); one end of the air supply pipe (39) is connected to the valve on the air supply tank (38), and the other end passes through the sealing plug (36); the thin sheet (37) is fixedly connected to the sealing plug (36) and is located in the pipeline; the thin sheet (37) and the air supply pipe (39) are located in the same sealing plug (36); and the sealing plug (36) is used to seal the opening of the pipeline.

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