A new type of electric heat pipe welding connection device

Abstract

The utility model provides a novel pipeline electric heat fusion welding connecting device relates to pipeline heat fusion welding technical field, including the shell, first mobile pole, the shell is set up hollow rectangular block, and the both sides middle part top of shell all are passed and are set up and place the groove, first mobile pole longitudinal activity is established below in the shell inside, and both sides of first mobile pole top are all opposite movement and are equipped with second mobile pole, second mobile pole top is equipped with controller, pipeline stop gear and pipeline rotating mechanism, the one end of shell inner wall top is equipped with third support rod, the utility model discloses the pipeline of waiting to weld passes through the placement groove and places one end at the top of the placement ring, then starts the controller control first electric telescopic rod shortening, extrusion rod extrudes and fixes the pipeline at the top of the placement ring, third servo motor and micro motor rotate simultaneously, and the effect that the oxidation layer is removed to the polishing of pipeline outer wall is reached automatic limiting and polishing.

Description

Technical Field

[0001] This utility model relates to the field of pipeline thermofusion welding technology, and in particular to a novel pipeline electrothermal welding connection device. Background Technology

[0002] Hot-melt welding is a method of joining pipes by heating the ends of the pipes together with a heating plate until they melt, then butt-jointing them and cooling them to set. Hot-melt welding mainly consists of five stages: preheating, heat absorption, conversion, welding, and cooling. The preheating stage involves applying pressure to the ends of the two pipes to melt and curl them. The heat absorption stage requires applying a relatively low pressure and sufficient time to allow heat to diffuse evenly within the pipes to be joined. The conversion stage involves the heating plate being withdrawn, minimizing the time required for the pipes to be joined. The welding stage involves fusing the molten ends of the two pipes together under pressure. The cooling stage refers to the natural cooling of the fused pipes. As can be seen from the above, existing pipe electrofusion welding is usually done manually. It requires first fixing the pipe on a frame, then manually grinding the outside of the pipe to remove the oxide layer, then manually moving the two pipes to the middle for electrofusion, and finally removing the electrofusion assembly and manually pressing the two pipes together for welding. This not only easily leads to burns from the electrofusion assembly during operation, but also requires a lot of effort to press and move long pipes for a long time. Therefore, this utility model proposes a new type of pipe electrofusion welding connection device to solve the problems existing in the prior art. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a novel pipe electrothermal welding connection device, which achieves automatic positioning and grinding effects, as well as automatic hot-melt connection effects.

[0004] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a novel pipe electrothermal welding connection device, including an outer shell and a first moving rod. The outer shell is arranged in a hollow rectangular block shape, and a placement groove is provided through the upper part of the middle of both sides of the outer shell. The first moving rod is longitudinally movably arranged in the lower part of the inner shell, and a second moving rod is provided on both sides above the first moving rod. The top of the second moving rod is provided with a controller, a pipe limiting mechanism and a pipe rotating mechanism. A third support rod is provided at one end of the top of the inner wall of the outer shell, and a feeding tube is provided through the other end of the top of the inner wall of the outer shell. A grinding mechanism is provided on the side of the top of the inner wall of the outer shell near the third support rod. A power supply mechanism for the connector is provided at the bottom of the feeding tube. Laser components adapted to the controller are provided on both sides of the inner wall of the outer shell.

[0005] A further improvement is that: a first servo motor is fixed at one end of the bottom of the inner wall of the outer shell, and a first threaded rod is fixed at the power output end of the first servo motor. The outer wall of the first threaded rod is threadedly connected to the first moving rod. Slide grooves are provided at both ends of the first moving rod. First guide rails are provided at the bottom of both sides of the inner wall of the outer shell near the slide grooves. The slide grooves are slidably connected to the first guide rails.

[0006] A further improvement is made in that: a second guide rail is fixed to the top of the first moving rod, and a second servo motor is provided at the middle position of the top of the second guide rail. The power output end of the second servo motor is provided with a second threaded rod. Both sets of the second moving rods are slidably connected to the second guide rail, and the two sides of the second threaded rod are respectively threadedly adapted to the two sets of the second moving rods. The tops of the two sets of the second moving rods are located on the same horizontal plane as the bottom of the placement groove.

[0007] A further improvement is that the pipe limiting mechanism includes a first support rod and a placement ring. One end of the first support rod is fixed to the top of the second moving rod, and the placement ring is fixed to the middle of the top of the first support rod. A first electric telescopic rod is provided at one end of the top of the first support rod, and a compression rod is provided at the power output end of the first electric telescopic rod.

[0008] A further improvement is that the pipeline driving mechanism includes a micro motor and a drive wheel. The micro motor is fixed to the first support rod, and the drive wheel is located at the power output end of the micro motor. The drive wheel is an inflatable tire, and the drive wheel is used to drive the pipeline to rotate at the top of the placement ring.

[0009] Further improvements are made in the following aspects: the polishing mechanism includes a third servo motor and a turntable. The third servo motor is located in the middle of the top of the inner wall of the outer shell. Two sets of third support rods are provided, and the two sets of third support rods are arranged in an isosceles triangle shape with the third servo motor. The turntable is located at the power output end of the third servo motor, and a polishing rod is fixed at the bottom of the turntable. Multiple sets of polishing rods are provided, and the multiple sets of polishing rods are arranged in a filling equidistant shape.

[0010] Further improvements include: the laser component includes a first laser lamp and a second laser lamp; the first laser lamp and the second laser lamp are respectively provided in the middle of both sides of the inner wall of the outer casing; the controller is equipped with a light sensor for receiving the light from the first laser lamp and the second laser lamp and controlling the operation of the overall device; the middle of the third servo motor and the two sets of the first laser lamps are located in the same vertical plane.

[0011] A further improvement is that the power supply mechanism of the connector includes a second support rod and a second electric telescopic rod. The second support rod is fixed to the bottom of the feed pipe and is L-shaped. The second electric telescopic rod is fixed to the top of the bottom end of the second support rod, and a connecting rod is fixed to the power output end of the second electric telescopic rod. Electrode heads are provided through both ends of the top of the connecting rod. The electrode heads are electrically connected to an external power source and are used to insert the electrode end of the pipe connector downward into the feed pipe.

[0012] A further improvement is made in that: a first groove is opened through both sides of the bottom of the feeding pipe, and a second groove is opened through both sides of the middle part of the bottom end of the feeding pipe. The two sets of second grooves are arranged in a corresponding manner with the two sets of electrode heads. The two ends of the pipe connector are located in the two sets of first grooves for connecting with the two pipes. The electrode ends of the pipe connector are located in the second grooves. The second electric telescopic rod extends to connect the two sets of electrode heads with the two electrode ends, supply power to heat the pipe connector, and connect the two pipes with the pipe connector.

[0013] A further improvement is that: a bellows cover is provided at the bottom of the inner wall of the outer shell near the first threaded rod and at the top of the second guide rail, and the bellows cover protects the first threaded rod and the second guide rail.

[0014] The beneficial effects of this utility model are as follows: 1. In this utility model, the pipe to be welded is passed through the placement groove and one end is placed on the top of the placement ring. Then, the controller is activated to control the first electric telescopic rod to shorten, and the extrusion rod to extrude and fix the pipe to the top of the placement ring. The third servo motor and the micro motor rotate simultaneously to grind and remove the oxide layer from the outer wall of the pipe, thereby achieving the effect of automatic positioning and grinding.

[0015] 2. After grinding is completed, the controller continues to control the first servo motor to transport the pipeline. The controller first controls the second servo motor to continue rotating, driving the pipeline limiting mechanism to move towards the center at the same time until the pipeline touches the third support rod. The two ends of the pipeline connector are located in the two first grooves. The two pipelines enter the inside of the connector. Then the controller controls the second electric telescopic rod to extend, connecting the two electrode heads to the two electrode ends, and supplying power to heat the connector, thereby achieving the effect of automatic heat fusion connection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial front view schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the bottom structure inside the outer shell of this utility model; Figure 4This is a schematic diagram of the grinding mechanism of this utility model; Figure 5 This is a schematic diagram of the structure of the feed tube of this utility model; Figure 6 This is a schematic diagram of the power supply mechanism of the connector in this utility model; Figure 7 This is a schematic diagram of the pipe limiting mechanism and the pipe rotating mechanism of this utility model; Figure 8 This is a schematic diagram of the working process of this utility model.

[0017] The components are as follows: 1. Outer shell; 2. Placement slot; 31. First servo motor; 32. First threaded rod; 33. First moving rod; 34. Slide groove; 35. First guide rail; 36. Bellows cover; 41. Second guide rail; 42. Second moving rod; 43. Second servo motor; 44. Second threaded rod; 51. First support rod; 52. Placement ring; 53. First electric telescopic rod; 54. Extrusion rod; 55. Micro motor; 56. Drive wheel; 61. Feed tube; 62. First groove; 63. Second groove; 64. Second support rod; 65. Second electric telescopic rod; 66. Connecting rod; 67. Electrode head; 7. Third support rod; 81. Third servo motor; 82. Turntable; 83. Grinding rod; 91. Controller; 92. First laser light; 93. Second laser light. Detailed Implementation

[0018] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0019] Example 1 according to Figure 1 , 2As shown in Figures 3, 4, 5, 6, 7, and 8, this embodiment proposes a novel pipe electrofusion welding connection device, including an outer shell 1. The outer shell 1 is a hollow rectangular block. Placement slots 2 are provided through the upper middle of both sides of the outer shell 1. A first servo motor 31 is fixed to one end of the bottom of the inner wall of the outer shell 1. A first threaded rod 32 is fixed to the power output end of the first servo motor 31. A first moving rod 33 is threadedly connected to the outer wall of the first threaded rod 32. A second guide rail 41 is fixed to the top of the first moving rod 33. A second servo motor 43 is fixed to the top of the second guide rail 41. A second threaded rod 44 is fixed to the power output end of the second servo motor 43. The top two ends of the second guide rail 41 are slidably connected to the second moving rods 42. The top of the two second moving rods 42 are fixed with the controller 91, the pipe limiting mechanism and the pipe rotating mechanism. The top of the inner wall of the outer shell 1 is fixed with the third support rod 7. The top of the inner wall of the outer shell 1 near the third support rod 7 is fixed with the grinding mechanism. The other end of the top of the inner wall of the outer shell 1 is fixed with the feeding pipe 61. The bottom of the feeding pipe 61 is fixed with the connecting power supply mechanism. The middle of both sides of the inner wall of the outer shell 1 is fixed with the first laser lamp 92 and the second laser lamp 93. The controller 91 is equipped with a light sensor to receive the light from the first laser lamp 92 and the second laser lamp 93.

[0020] The first moving rod 33 has a sliding groove 34 at both ends. The bottom of both sides of the inner wall of the outer shell 1 near the sliding groove 34 is fixed with a first guide rail 35. The sliding groove 34 is slidably connected to the first guide rail 35. The first threaded rod 32 is driven to rotate by the first servo motor 31. The sliding groove 34 and the first guide rail 35 cooperate to make the first moving rod 33 slide on the first guide rail 35, thereby driving the top pipe limiting mechanism and the pipe rotating mechanism to move.

[0021] Among them, the threads of the two second moving rods 42 and the second threaded rod 44 are opposite, and the tops of the two second moving rods 42 are on the same horizontal plane as the bottom of the placement groove 2. The rotation of the second servo motor 43 drives the two second moving rods 42 to move in opposite directions on the second guide rail 41, thereby driving the pipe limiting mechanism to move towards the middle at the same time until the two ends of the pipe touch the two third support rods 7.

[0022] The pipe limiting mechanism includes a first support rod 51, one end of which is fixed to the top of the second moving rod 42. A placement ring 52 is fixed to the middle of the top of the first support rod 51. A first electric telescopic rod 53 is fixed to one end of the top of the first support rod 51. A pressing rod 54 is fixed to the power output end of the first electric telescopic rod 53. Before hot melt welding, the pipe to be welded is passed through the placement groove 2 and one end is placed on the top of the placement ring 52. Then, the controller 91 controls the first electric telescopic rod 53 to shorten, and the pressing rod 54 presses and fixes the pipe to the top of the placement ring 52.

[0023] The pipeline drive mechanism includes a micro motor 55, which is fixed to the first support rod 51. The power output end of the micro motor 55 is fixed with a drive wheel 56, which is an inflatable tire. When grinding to remove the oxide layer on the outer wall, the micro motor 55 drives the drive wheel 56 to rotate, and the drive wheel 56 drives the pipeline to rotate on the top of the placement ring 52. To avoid difficulty in rotation, rollers can be set at the bottom of the extrusion rod 54 and the top of the placement ring 52.

[0024] The grinding mechanism includes a third servo motor 81, which is located in the middle of the top of the inner wall of the outer casing 1. Two third support rods 7 are provided, and the two third support rods 7 and the third servo motor 81 are arranged in an isosceles triangle shape. A turntable 82 is fixed to the power output end of the third servo motor 81, and a grinding rod 83 is fixed to the bottom of the turntable 82. Multiple grinding rods 83 are provided, and the multiple grinding rods 83 are arranged in a filling equidistant shape. The middle of the third servo motor 81 and the two first laser lights 92 are located in the same vertical plane. During grinding, the controller 91 controls the first servo motor 31 to transport the pipe to the bottom of the third servo motor 81. At this time, the first laser light 92 and the controller 91 are located in the same vertical plane. The third servo motor 81 and the micro motor 55 rotate simultaneously to grind and remove the oxide layer from the outer wall of the pipe.

[0025] The power supply mechanism of the connector includes a second support rod 64, which is fixed to the bottom of the feed pipe 61. The second support rod 64 is L-shaped. A second electric telescopic rod 65 is fixed to the top of the bottom end of the second support rod 64. A connecting rod 66 is fixed to the power output end of the second electric telescopic rod 65. Electrode heads 67 are fixed through both ends of the top of the connecting rod 66. The two electrode heads 67 are electrically connected to an external power source. The electrode ends of the pipe connector are inserted into the feed pipe 61 with the electrode ends facing down.

[0026] The feed tube 61 has a first groove 62 extending through both sides of its bottom, and a second groove 63 extending through both sides of the middle of its bottom end. The two second grooves 63 are arranged in a corresponding manner with the two electrode heads 67. The two ends of the pipe connector are located in the two first grooves 62 and can be connected to the two pipes. The electrode ends are located in the second grooves 63. The second electric telescopic rod 65 extends to connect the two electrode heads 67 to the two electrode ends, providing power to heat the connector and connecting the two pipes to the connector.

[0027] Among them, a bellows cover 36 is fixed to the bottom of the inner wall of the outer shell 1 near the first threaded rod 32 and the top of the second guide rail 41. The bellows cover 36 protects the first threaded rod 32 and the second guide rail 41 and prevents external debris from affecting their rotation.

[0028] Example 2 according to Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, and 8, this embodiment proposes a novel pipe electrofusion welding connection device, which includes the following operating steps: The controller 91 has the function of sensing the first laser light 92 and the second laser light 93, and also has the function of controlling the first servo motor 31, the second servo motor 43, the first electric telescopic rod 53, the micro motor 55, the second electric telescopic rod 65, and the third servo motor 81. S1: Controller 91 controls the two first electric telescopic rods 53 to shorten, and then controls the second servo motor 43 to rotate until the pipe touches the third support rod 7; S2: The controller 91 controls the first electric telescopic rod 53, and then controls the first servo motor 31 to rotate until the controller 91 senses the first laser light 92. Then, the controller 91 randomly controls the first servo motor 31 to stop, and then controls the micro motor 55 and the third servo motor 81 to rotate simultaneously for 1-2 minutes before automatically stopping. S3: Then the controller 91 controls the first servo motor 31 to continue rotating until the controller 91 senses the second laser light 93 and stops, controls the second electric telescopic rod 65 to extend, and then controls the second servo motor 43 to rotate. S4: Controller 91 then controls the extension of the two first electric telescopic rods 53.

[0029] Specific usage and function: First, the pipe to be welded is passed through the placement groove 2 and one end is placed on top of the placement ring 52. Then, the controller 91 is activated to control the first electric telescopic rod 53 to shorten, and the extrusion rod 54 extrudes and fixes the pipe to the top of the placement ring 52. The controller 91 controls both first electric telescopic rods 53 to shorten, and the extrusion rods 54 extrudes and fixes the pipe to the top of the placement ring 52. Then, the second servo motor 43 is controlled to rotate, driving the two second moving rods 42 to move in opposite directions on the second guide rail 41, thereby driving the pipe limiting mechanism to move towards the center until the pipe touches the third support rod 7. Then, the controller 91 controls the first servo motor 31 to drive the first threaded rod 32 to rotate. The sliding groove 34 and the first guide rail 35 cooperate to make the first moving rod 33 slide on the first guide rail 35, driving the top pipe limiting mechanism and the pipe rotating mechanism to move. At this time, the first laser lamp 92 and the controller 91 are located on the same vertical plane, and the third servo motor 81 and the micro motor 55 rotate simultaneously, pressing against the outer wall of the pipe. The oxide layer is removed by grinding. The micro motor 55 drives the drive wheel 56 to rotate, and the drive wheel 56 drives the pipe to rotate on the top of the placement ring 52. To avoid difficulty in rotation, rollers are set at the bottom of the extrusion rod 54 and the top of the placement ring 52. During grinding, the first threaded rod 32 and the second guide rail 41 are protected by the bellows cover 36 to prevent external debris from affecting their rotation. After grinding, the controller 91 continues to control the first servo motor 31 to transport the pipe. At the same time, the electrode end of the pipe connector is manually inserted into the feed pipe 61 with the electrode end facing down. The electrode end is located in the second groove 63. When the controller 91 moves to the second laser lamp 93, the controller 91 first controls the second servo motor 43 to continue rotating. The two ends of the pipe connector are located in the two first grooves 62. The two pipes enter the connector. Then the controller 91 controls the second electric telescopic rod 65 to extend, connecting the two electrode heads 67 to the two electrode ends, supplying power to heat the connector, connecting the two pipes to the connector, and then removing the pipe.

[0030] This new type of pipe electrofusion welding connection device.

[0031] The pipe to be welded is passed through the placement groove 2 and one end is placed on top of the placement ring 52. Then, the controller 91 is activated to control the first electric telescopic rod 53 to shorten. The extrusion rod 54 extrudes and fixes the pipe to the top of the placement ring 52. The third servo motor 81 and the micro motor 55 rotate simultaneously to grind and remove the oxide layer from the outer wall of the pipe, thereby achieving the effect of automatic limiting and grinding.

[0032] After polishing is completed, controller 91 continues to control the first servo motor 31 to transport the pipe. Controller 91 first controls the second servo motor to continue rotating, driving the pipe limiting mechanism to move towards the center at the same time until the pipe touches the third support rod 7. The two ends of the pipe connector are located in the two first grooves 62. The two pipes enter the inside of the connector. Then controller 91 controls the second electric telescopic rod 65 to extend, connecting the two electrode heads 67 to the two electrode ends, and supplying power to heat the connector, thereby achieving the effect of automatic heat fusion connection.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel pipe electrofusion welding connection device, comprising an outer shell (1) and a first moving rod (33), characterized in that: The outer shell (1) is a hollow rectangular block, and a placement slot (2) is provided through the upper part of the middle of both sides of the outer shell (1). The first moving rod (33) is longitudinally movable in the lower part of the inner shell (1), and the two sides above the first moving rod (33) are respectively provided with a second moving rod (42). The top of the second moving rod (42) is provided with a controller (91), a pipe limiting mechanism and a pipe rotating mechanism. The top of the inner wall of the outer shell (1) is provided with a third support rod (7), and the other end of the top of the inner wall of the outer shell (1) is provided with a feed tube (61). A grinding mechanism is provided on the side of the top of the inner wall of the outer shell (1) near the third support rod (7). A power supply mechanism for the connector is provided at the bottom of the feed tube (61). Laser components adapted to the controller (91) are provided on both sides of the inner wall of the outer shell (1).

2. The novel pipe electrofusion welding connection device according to claim 1, characterized in that: The bottom of the inner wall of the outer shell (1) is fixed with a first servo motor (31), and the power output end of the first servo motor (31) is fixed with a first threaded rod (32). The outer wall of the first threaded rod (32) is threadedly connected to the first moving rod (33). Both ends of the first moving rod (33) are provided with sliding grooves (34). The bottom of both sides of the inner wall of the outer shell (1) is provided with a first guide rail (35) near the sliding groove (34). The sliding groove (34) is slidably connected to the first guide rail (35).

3. The novel pipe electrofusion welding connection device according to claim 2, characterized in that: The top of the first moving rod (33) is fixed with a second guide rail (41), and a second servo motor (43) is provided at the middle position of the top of the second guide rail (41). The power output end of the second servo motor (43) is provided with a second threaded rod (44). Both sets of the second moving rods (42) are slidably connected to the second guide rail (41). The two sides of the second threaded rod (44) are respectively threaded and adapted to the two sets of the second moving rods (42). The top of the two sets of the second moving rods (42) and the bottom of the placement groove (2) are located on the same horizontal plane.

4. The novel pipe electrofusion welding connection device according to claim 1, characterized in that: The pipe limiting mechanism includes a first support rod (51) and a placement ring (52). One end of the first support rod (51) is fixed to the top of the second moving rod (42), and the placement ring (52) is fixed in the middle of the top of the first support rod (51). A first electric telescopic rod (53) is provided at one end of the top of the first support rod (51), and a pressing rod (54) is provided at the power output end of the first electric telescopic rod (53).

5. A novel pipe electrofusion welding connection device according to claim 1, characterized in that: The pipeline driving mechanism includes a micro motor (55) and a drive wheel (56). The micro motor (55) is fixed to the first support rod (51). The drive wheel (56) is located at the power output end of the micro motor (55). The drive wheel (56) is an inflatable tire and is used to drive the pipeline to rotate on the top of the placement ring (52).

6. The novel pipe electrofusion welding connection device according to claim 1, characterized in that: The polishing mechanism includes a third servo motor (81) and a turntable (82). The third servo motor (81) is located in the middle of the top of the inner wall of the outer shell (1). There are two sets of third support rods (7). The two sets of third support rods (7) and the third servo motor (81) are arranged in an isosceles triangle shape. The turntable (82) is located at the power output end of the third servo motor (81). A polishing rod (83) is fixed at the bottom of the turntable (82). There are multiple sets of polishing rods (83). The multiple sets of polishing rods (83) are arranged in a filling equidistant shape.

7. A novel pipe electrofusion welding connection device according to claim 6, characterized in that: The laser component includes a first laser lamp (92) and a second laser lamp (93). The first laser lamp (92) and the second laser lamp (93) are provided in the middle of both sides of the inner wall of the outer casing (1). The controller (91) is equipped with a light sensor to receive the light from the first laser lamp (92) and the second laser lamp (93) and control the operation of the overall device. The middle of the third servo motor (81) and the two sets of the first laser lamps (92) are located in the same vertical plane.

8. A novel pipe electrofusion welding connection device according to claim 1, characterized in that: The power supply mechanism of the connector includes a second support rod (64) and a second electric telescopic rod (65). The second support rod (64) is fixed to the bottom of the feed pipe (61) and is L-shaped. The second electric telescopic rod (65) is fixed to the top of the bottom end of the second support rod (64), and a connecting rod (66) is fixed to the power output end of the second electric telescopic rod (65). Electrode heads (67) are provided through both ends of the top of the connecting rod (66). The electrode heads (67) are electrically connected to an external power source and are used to insert the electrode end of the pipe connector downward into the feed pipe (61).

9. A novel pipe electrofusion welding connection device according to claim 8, characterized in that: The bottom of the feeding pipe (61) has a first groove (62) through both sides, and the bottom of the feeding pipe (61) has a second groove (63) through both sides. The two sets of second grooves (63) are arranged in a corresponding manner with the two sets of electrode heads (67). The two ends of the pipe connector are located in the two sets of first grooves (62) for connecting with the two pipes. The electrode ends of the pipe connector are located in the second grooves (63). The second electric telescopic rod (65) extends to connect the two sets of electrode heads (67) with the two electrode ends, and supplies power to heat the pipe connector to connect the two pipes with the pipe connector.

10. A novel pipe electrofusion welding connection device according to claim 3, characterized in that: The bottom of the inner wall of the outer shell (1) near the first threaded rod (32) and the top of the second guide rail (41) are provided with bellows covers (36), and the bellows covers (36) protect the first threaded rod (32) and the second guide rail (41).

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