A replenishing sealing device for slurry conveying high-pressure pipeline connection and process

Abstract

The present application relates to the field of pipeline makeup seal, especially to a makeup seal device and process for slurry conveying high-pressure pipeline connection, which can uniformly carry out makeup in a stable moving state after accurate positioning of the heating nozzle, thereby improving the sealing performance of the pipeline connection. The makeup seal device and process for slurry conveying high-pressure pipeline connection include a handle frame and the like, the handle frame is slidably connected with a fixing frame, a return spring is connected between the handle frame and the fixing frame, and the fixing frame is provided with an annular mechanism for makeup of the joint between two pipelines. The heating nozzle uniformly makes up the pipeline gap, which can more uniformly make up the joint between the pipelines and seal the joint, so that the polyethylene material filled in the joint is more flat.

Description

Technical Field

[0001] This invention relates to the field of pipeline filling and sealing, and more particularly to a filling and sealing device and process for connecting high-pressure pipelines for slurry transportation. Background Technology

[0002] For mine slurry conveying pipelines, due to their extremely long lengths, splicing is generally used. For splicing multiple pipeline sections, ensuring a tight seal at the joints is crucial for smooth transport. Therefore, joint filling is necessary. Currently, this is done manually, with a handheld spray gun spraying polyethylene around the pipe joint. This requires adapting to different pipe sizes and ensuring the spray gun fits snugly against the joint. Maintaining a uniform speed for filling the joints results in uneven filling, affecting subsequent pipeline use. Furthermore, manual filling suffers from unstable spray guns and inaccurate positioning, potentially causing wobbling and gaps at the pipe joints, compromising the pipeline's seal. Summary of the Invention

[0003] To overcome the shortcomings of manual material replenishment at pipe joints, such as inaccurate sealing, uneven material replenishment, uneven pipe surface, and insufficient stability of the heating nozzle during sealing, which leads to gaps and affects the sealing effect, this invention provides a material replenishment and sealing device and process for high-pressure pipeline connections used for slurry transportation. This device and process enable the heating nozzle to be accurately positioned and to replenish material evenly in a stable moving state, thereby improving the sealing performance at pipe joints.

[0004] The technical solution of this invention is:

[0005] A filling and sealing device and process for connecting high-pressure pipelines for slurry transportation includes a handle frame, a fixed frame slidably connected to the handle frame, a return spring connected between the handle frame and the fixed frame, an annular mechanism for filling the joint of two pipelines on the fixed frame, a hydraulic mechanism for hydraulic movement on the handle frame and the fixed frame, and a feeding mechanism for heating the filling material on the fixed frame and the annular mechanism.

[0006] Further explanation: the annular mechanism includes connecting rods, which are fixedly connected to a fixed frame. There are two connecting rods, which are symmetrically arranged. Each connecting rod is rotatably connected to an arc-shaped frame. The arc-shaped frame is connected to the fixed frame by two sets of torsion springs, which are symmetrically arranged. Each set of torsion springs contains two springs. Each arc-shaped frame is slidably connected to a sliding frame. Each sliding frame is slidably connected to a heating nozzle at its bottom. Two pressure springs connect the sliding frame and the heating nozzle. Magnetic rings are installed on the upper part of each sliding frame.

[0007] Further explanation: The hydraulic mechanism includes two hydraulic tanks mounted on a fixed frame. The two hydraulic tanks are symmetrically arranged, and each hydraulic tank has a piston rod slidably connected inside. The top of the piston rod is fixedly connected to the bottom of the handle frame. Hydraulic pipes are installed on both arc-shaped frames. The magnetic ring is slidably connected to the hydraulic pipe. A connecting pipe is connected between the end of the hydraulic pipe near the hydraulic tank and the bottom of the hydraulic tank. One end of the connecting pipe is connected to the hydraulic pipe, and the other end of the connecting pipe is connected to the hydraulic tank. Magnetic blocks are slidably connected to the other ends of the two hydraulic pipes near the hydraulic tank. The magnetic blocks and magnetic rings have opposite magnetic properties and are attracted to each other.

[0008] Further explanation: The feeding mechanism includes a mounting frame, which is fixedly connected to a fixed frame. A storage bin is mounted on the mounting frame. A push plate is slidably connected inside the storage bin. Insulation pipes are connected between the side of the storage bin away from the mounting frame and the two heating nozzles. One end of the insulation pipe is connected to the storage bin, and the other end is connected to the heating nozzles. A lead screw is rotatably connected inside the storage bin. The push plate is threadedly connected to the lead screw. A spur gear is fixedly connected to the lead screw. An arc-shaped rack is slidably connected to the mounting frame. One end of the arc-shaped rack is fixedly connected to the sliding frame, and the other end of the arc-shaped rack meshes with the spur gear.

[0009] Further explanation: It also includes a positioning mechanism, which includes electric push rods. The electric push rods are installed at the bottom of the fixed frame. There are four electric push rods in total. Each of the four electric push rods has a ramp fixed to its telescopic rod. Four fixing blocks are installed inside the fixed frame. Four clamping frames are slidably connected to the bottom of the fixed frame. A tension spring is connected between the clamping frame and the fixing block. Each pair of electric push rods, ramps, fixing blocks, clamping frames and tension springs forms a group.

[0010] To further explain, it also includes an arc-shaped piece, with an arc-shaped piece fixedly connected to the bottom of each of the arc-shaped frames.

[0011] To further explain, it also includes a fixing strip, which is fixed to the bottom of the fixing frame. There are two fixing strips, each of which is located between the two clamping frames in each group. Several ball bearings are rotatably connected to both fixing strips.

[0012] A process for a feed sealing device for connecting a high-pressure pipeline for slurry transportation, the process comprising the following steps:

[0013] Step 1: The worker first holds the handle frame and places the bottom of the curved frame against the top of the connection between the two pipes. The worker then presses the handle frame down so that the pipe is positioned between the fixed frame and the curved frame.

[0014] Step 2: The staff starts the electric push rod. When the electric push rod extends, it will drive the two sets of inclined plates to move closer to each other. The movement of the inclined plates will push the clamping frame downward, and the two sets of clamping frames will clamp the pipe.

[0015] Step 3: Then, the worker moves along the pipeline and aligns the heating nozzle with the pipeline interface. The worker continues to press the handle down, so that the heating nozzle is close to the pipeline. The liquid in the hydraulic tank enters the hydraulic pipe through the connecting pipe. The heating nozzle slides down in the arc frame. The push plate moves to push the melted polyethylene liquid in the storage tank into the heating nozzle through the insulation pipe.

[0016] Step 4: The staff loosens the handle, the magnetic block moves and drives the sliding frame and heating nozzle to reset. Finally, the staff lifts the handle to detach the device from the pipeline.

[0017] The beneficial effects are:

[0018] 1. The compression spring of the heating nozzle presses against the pipe, allowing the heating nozzle to adapt to different pipe sizes and fit more closely to the pipe joints. This closer fit prevents incorrect placement of the sprayed polyethylene material, enabling more accurate material filling and sealing.

[0019] 2. After aligning the heating nozzle with the pipe joint, press down the handle to slide the heating nozzle around the pipe while simultaneously feeding polyethylene from the storage tank into the heating nozzle to fill the pipe gap. The heating nozzle fits more closely to the pipe joint, preventing incorrect placement of the sprayed polyethylene and ensuring more accurate sealing. Filling the pipe joint while the heating nozzle slides ensures more even sealing and a smoother polyethylene filling.

[0020] 3. When the electric push rod extends, it will drive the two sets of inclined plates to move closer to each other. The movement of the inclined plates will push the clamping frame downward to clamp the pipe. The electric push rod automatically positions the heating nozzle and aligns it. Using the electric push rod for positioning and calibration will be more accurate and further improve the accuracy of material replenishment. After calibration, clamping the pipe will make the seal more stable and reduce shaking. It can reduce the gaps caused by shaking of the equipment during material replenishment and ensure the pipe's sealing performance to the greatest extent. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the ring mechanism of the present invention.

[0023] Figure 3 This is a cross-sectional three-dimensional structural diagram of the hydraulic mechanism of the present invention.

[0024] Figure 4 This is an enlarged cross-sectional three-dimensional structural schematic diagram of the hydraulic mechanism of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the sliding frame and magnetic ring of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of part of the present invention.

[0027] Figure 7 This is a cross-sectional three-dimensional structural diagram of the feeding mechanism of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the fixing frame and positioning mechanism of the present invention.

[0029] Figure 9 This is a three-dimensional structural diagram of the positioning mechanism of the present invention.

[0030] Figure 10 This is a cross-sectional three-dimensional structural diagram of the positioning mechanism of the present invention.

[0031] Figure 11 This is a schematic diagram of the disassembled three-dimensional structure of the positioning mechanism of the present invention.

[0032] Figure 12 This is a three-dimensional structural cross-sectional view of the positioning mechanism, fixing bar, and ball bearings of the present invention.

[0033] In the attached diagrams: 1: Pipe, 2: Handle frame, 3: Fixing frame, 4: Return spring, 51: Connecting rod, 52: Arc-shaped frame, 53: Torsion spring, 54: Sliding frame, 55: Heating nozzle, 56: Pressure spring, 57: Magnetic ring, 61: Hydraulic tank, 62: Piston rod, 63: Hydraulic pipe, 64: Connecting pipe, 65: Magnetic block, 71: Mounting frame, 72: Storage tank, 721: Push plate, 73: Insulation pipe, 74: Lead screw, 75: Spur gear, 76: Arc-shaped rack frame, 81: Electric push rod, 82: Inclined plate, 83: Fixing block, 84: Clamping frame, 85: Tension spring, 9: Arc-shaped piece, 10: Fixing strip, 11: Ball bearing. Detailed Implementation

[0034] 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.

[0035] Example 1: A feeding and sealing device and process for connecting high-pressure pipelines for slurry transportation, such as... Figures 1-7 As shown, it includes a handle frame 2, a fixed frame 3 slidably connected to the handle frame 2, a return spring 4 connected between the handle frame 2 and the fixed frame 3, an annular mechanism for replenishing material at the joint of the two pipes 1 on the fixed frame 3, a hydraulic mechanism for hydraulic movement on the handle frame 2 and the fixed frame 3, and a feeding mechanism for heating the replenished material on the fixed frame 3 and the annular mechanism.

[0036] The annular mechanism includes two connecting rods 51, which are fixedly connected to the fixed frame 3. The two connecting rods 51 are symmetrically arranged. An arc-shaped frame 52 is rotatably connected to each of the two connecting rods 51. Two sets of torsion springs 53 are connected to the fixed frame 3 through the arc-shaped frame 52. The two sets of torsion springs 53 are symmetrically arranged, and each set of torsion springs 53 contains two springs. A sliding frame 54 is slidably connected to each of the two arc-shaped frames 52. A heating nozzle 55 is slidably connected to the bottom of each of the two sliding frames 54. Two pressure springs 56 are connected between the sliding frame 54 and the heating nozzle 55. When the heating nozzle 55 touches the joint of the two pipes 1, it compresses the pressure springs 56, making the heating nozzle 55 fit more closely to the joint of the two pipes 1. A magnetic ring 57 is installed on the upper part of each sliding frame 54.

[0037] The hydraulic mechanism includes a hydraulic tank 61, which is mounted on a fixed frame 3. There are two hydraulic tanks 61 arranged symmetrically. A piston rod 62 is slidably connected inside each hydraulic tank 61. The top of the piston rod 62 is fixedly connected to the bottom of the handle frame 2. Hydraulic pipes 63 are mounted on both arc-shaped frames 52. A magnetic ring 57 is slidably connected to the hydraulic pipe 63. The end of the hydraulic pipe 63 closest to the hydraulic tank 61 is connected to the hydraulic tank 61. A connecting pipe 64 is connected between the bottoms. One end of the connecting pipe 64 is connected to the hydraulic pipe 63, and the other end of the connecting pipe is connected to the hydraulic tank 61. The magnetic blocks 65 are slidably connected to the other ends of the two hydraulic pipes 63 near the hydraulic tank 61. The magnetic blocks 65 and the magnetic ring 57 have opposite magnetic properties. The magnetic blocks 65 and the magnetic ring 57 are attracted to each other. The magnetic blocks 65 will drive the magnetic ring 57 to slide downward, so that the heating nozzle 55 slides downward at a uniform speed.

[0038] The feeding mechanism includes a mounting frame 71, which is fixedly connected to a fixed frame 3. A storage bin 72 is mounted on the mounting frame 71. A push plate 721 is slidably connected inside the storage bin 72. Insulation pipes 73 are connected between the side of the storage bin 72 away from the mounting frame 71 and the two heating nozzles 55. One end of the insulation pipe 73 communicates with the storage bin 72, and the other end communicates with the heating nozzles 55. A lead screw 74 is rotatably connected inside the storage bin 72. The push plate 721 is threadedly connected to the lead screw 74. The push plate 721 will push the polyethylene material in the storage tank 72 into the heating nozzle 55 through the heat insulation pipe 73. The lead screw 74 is fixedly connected to the column gear 75. The mounting bracket 71 is slidably connected to the arc rack bracket 76. One end of the arc rack bracket 76 is fixedly connected to the sliding bracket 54, and the other end of the arc rack bracket 76 meshes with the column gear 75. The heating nozzle 55 slides downward at a uniform speed while replenishing material and sealing.

[0039] The worker first holds the handle 2, placing the bottom of the arc-shaped frame 52 against the top of the connection between the two pipes 1. Both pipes 1 have a raised connection. The worker presses the handle down, causing the pipes 1 to open the arc-shaped frames 52. After opening, the fixing frame 3 presses against the pipes 1. The torsion spring 53 resets, causing the arc-shaped frames 52 to reset as well, placing the pipes 1 between the fixing frame 3 and the arc-shaped frames 52. The worker then moves along the pipes 1, aligning the heating nozzle 55 with the pipe 1's interface. The worker continues to press the handle 2 down, compressing the pressure spring 56 to press the heating nozzle 55 tightly against the pipes 1. The downward pressure of the handle 2 moves the piston rod 62, which compresses the liquid in the hydraulic tank 61, forcing it into the hydraulic pipe 63 through the connecting pipe 64. This pushes the magnetic block 65 within the hydraulic pipe 63, causing it to move. The magnetic block 65 moves the magnetic ring 57, which in turn moves the sliding frame 54, thus driving the heating element... The hot nozzle 55 slides downward within the arc-shaped frame 52. When the sliding frame 54 moves, it drives the arc-shaped rack frame 76 to move. The arc-shaped rack frame 76 drives the column gear 75 to rotate. The rotation of the column gear 75 drives the lead screw 74 to rotate. The rotation of the lead screw 74 drives the push plate 721 to move, pushing the melted polyethylene liquid in the storage tank 72 into the hot nozzle 55 through the heat insulation pipe 73. As the hot nozzle 55 slides downward along the arc-shaped frame 52, each hot nozzle 55 will slide 180 degrees. The two hot nozzles 55 can completely fill the gaps in the pipe 1. When the operator releases the handle frame 2, the return spring 4 returns to its original position, driving the piston rod 62 to move upward, thereby driving the magnetic block 65 in the hydraulic pipe 63 to move. The movement of the magnetic block 65 drives the sliding frame 54 and the hot nozzle 55 to return to their original positions. Finally, the operator lifts the handle frame 2, and the pipe 1 opens the arc-shaped frame 52 again, allowing the device to detach from the pipe 1 and continue to supply material and seal other pipes 1. The heating nozzle 55 compresses the pressure spring 56 and presses against the pipe 1, allowing the heating nozzle 55 to adapt to different pipe sizes and fit the joint of the pipe 1 more closely. After the heating nozzle 55 is aligned with the joint of the pipe 1, the handle 2 is pressed down to make the heating nozzle 55 slide around the pipe 1. At the same time, the polyethylene in the storage tank 72 is put into the heating nozzle 55 to fill the gap of the pipe 1, which can more evenly fill and seal the joint of the pipe 1, making the polyethylene material filling the joint more flat.

[0040] Example 2: Based on Example 1, such as Figures 8-11As shown, it also includes a positioning mechanism, which includes electric push rods 81. The electric push rods 81 are installed at the bottom of the fixing frame 3. There are four electric push rods 81 in total. The four electric push rods 81 will position the heating nozzle 55 at the joint of the two pipes 1. The telescopic rods of the four electric push rods 81 are all fixed with inclined plates 82. Four fixing blocks 83 are installed on the inner side of the fixing frame 3. Four clamping frames 84 are slidably connected to the bottom of the fixing frame 3. The four clamping frames 84 will clamp the two pipes 1. A tension spring 85 is connected between the clamping frame 84 and the fixing block 83. Every two electric push rods 81, inclined plates 82, fixing blocks 83, clamping frames 84 and tension springs 85 form a group.

[0041] When the fixing bracket 3 abuts against the pipe 1, the operator activates the electric actuators 81. The tip of the telescopic rod of one set of electric actuators 81 will first contact the outside of the pipe 1 interface. The tip of the telescopic rod of the electric actuator 81 will press against the side of the protrusion of the pipe 1 away from the joint. The protrusion of the pipe 1 will squeeze the other set of electric actuators 81 to move closer to the first set of electric actuators 81. The telescopic rods of the two sets of electric actuators 81 will be equidistant. When the telescopic rods of both sets of electric actuators 81 have contacted the protrusion of the pipe 1, the telescopic rods of both sets of electric actuators 81 will stop extending and will automatically align the heating nozzle 55 with the joint of the pipe 1. The electric actuators 81 will then extend. The two inclined plates 82 will move closer to each other, and the movement of the inclined plates 82 will push the clamping frame 84 downward. The two clamping frames 84 clamp the pipe 1. The two electric push rods 81 extend simultaneously, thereby automatically positioning the position of the heating nozzle 55. This is more accurate than manually controlling and calibrating the heating nozzle 55 for material replenishment and sealing. It is also more stable during the material replenishment process, preventing polyethylene material from leaking out due to lack of calibration, which would affect the subsequent use of the pipe 1. After calibration, clamping the pipe 1 with the two clamping frames 84 makes the sealing more stable and reduces shaking, thus reducing gaps caused by shaking of the equipment during material replenishment.

[0042] Example 3: Based on Example 2, such as Figure 1 and Figure 12 As shown, it also includes an arc-shaped piece 9. Each arc-shaped frame 52 has an arc-shaped piece 9 fixedly connected to its bottom. The arc-shaped piece 9 is used to quickly open the arc-shaped frame 52.

[0043] It also includes a fixing strip 10, which is fixed to the bottom of the fixing frame 3. There are two fixing strips 10, and each fixing strip 10 is located between the two clamping frames 84 in each group. Several balls 11 are rotatably connected to each of the two fixing strips 10. The balls 11 are used to reduce the friction between the fixing frame 3 and the pipe 1.

[0044] When the arc frame 52 opens the pipe 1, the arc plate 9 will contact the pipe 1 first, which can guide and pre-open the arc frame 52, so that the arc frame 52 can quickly open and clamp the pipe 1.

[0045] When the heating nozzle 55 is positioned left and right, the fixing bracket 3 will contact the pipe 1. The ball bearing 11 can reduce the friction between the bottom of the fixing bracket 3 and the pipe 1, making the fixing bracket 3 move more smoothly on the pipe 1 and extending the service life of the pipe 1.

[0046] 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. A feeding and sealing device for connecting high-pressure pipelines for slurry conveying, characterized in that: It includes a handle frame (2), a fixed frame (3) is slidably connected to the handle frame (2), a return spring (4) is connected between the handle frame (2) and the fixed frame (3), the fixed frame (3) is provided with an annular mechanism for replenishing material at the joint of the two pipes (1), the handle frame (2) and the fixed frame (3) are provided with a hydraulic mechanism for hydraulic movement, and the fixed frame (3) and the annular mechanism are provided with a feeding mechanism for heating the replenished material; The ring mechanism includes a connecting rod (51), which is fixedly connected to the fixed frame (3). There are two connecting rods (51), which are symmetrically arranged. An arc frame (52) is rotatably connected to each of the two connecting rods (51). Two sets of torsion springs (53) are connected to the fixed frame (3) of the arc frame (52). The two sets of torsion springs (53) are symmetrically arranged, and there are two torsion springs in each set. A sliding frame (54) is slidably connected to each of the two arc frames (52). A heating nozzle (55) is slidably connected to the bottom of each of the two sliding frames (54). Two pressure springs (56) are connected between the sliding frame (54) and the heating nozzle (55). A magnetic ring (57) is installed on the upper part of each of the two sliding frames (54). Hydraulic pipes (63) are installed on both of the arc-shaped frames (52). Magnetic blocks (65) are slidably connected to the other end of each hydraulic pipe (63) near the hydraulic tank (61). The magnetic blocks (65) and the magnetic ring (57) have opposite magnetic properties, and the magnetic blocks (65) and the magnetic ring (57) attract each other. The feeding mechanism includes a mounting frame (71), which is fixedly connected to a fixed frame (3). A storage bin (72) is mounted on the mounting frame (71). A lead screw (74) is rotatably connected inside the storage bin (72). A spur gear (75) is fixedly connected to the lead screw (74). An arc-shaped rack frame (76) is slidably connected to the mounting frame (71). One end of the arc-shaped rack frame (76) is fixedly connected to the sliding frame (54), and the other end of the arc-shaped rack frame (76) meshes with the spur gear (75).

2. A feeding and sealing device for connecting a high-pressure pipeline for slurry conveying according to claim 1, characterized in that: The hydraulic mechanism includes a hydraulic tank (61), which is mounted on a fixed frame (3). There are two hydraulic tanks (61) arranged symmetrically. A piston rod (62) is slidably connected inside each of the two hydraulic tanks (61). The top of the piston rod (62) is fixedly connected to the bottom of the handle frame (2). The magnetic ring (57) is slidably connected to the hydraulic pipe (63). A connecting pipe (64) is connected between the end of the hydraulic pipe (63) near the hydraulic tank (61) and the bottom of the hydraulic tank (61). One end of the connecting pipe (64) is connected to the hydraulic pipe (63), and the other end of the connecting pipe (64) is connected to the hydraulic tank (61).

3. A feeding and sealing device for connecting a high-pressure pipeline for slurry conveying according to claim 2, characterized in that: A push plate (721) is slidably connected inside the storage tank (72). A heat insulation pipe (73) is connected between the side of the storage tank (72) away from the mounting frame (71) and the two heating nozzles (55). One end of the heat insulation pipe (73) is connected to the storage tank (72), and the other end of the heat insulation pipe (73) is connected to the heating nozzle (55). The push plate (721) is connected to the lead screw (74) by a thread.

4. A feeding and sealing device for connecting a high-pressure pipeline for slurry conveying according to claim 3, characterized in that: It also includes a positioning mechanism, which includes an electric push rod (81). The electric push rod (81) is installed at the bottom of the fixed frame (3). There are four electric push rods (81). An inclined plate (82) is fixed to the telescopic rod of each of the four electric push rods (81). Four fixing blocks (83) are installed on the inner side of the fixed frame (3). Four clamping frames (84) are slidably connected to the bottom of the fixed frame (3). A tension spring (85) is connected between the clamping frame (84) and the fixing block (83). Each pair of electric push rods (81), inclined plate (82), fixing block (83), clamping frame (84) and tension spring (85) forms a group.

5. A feeding and sealing device for connecting a high-pressure pipeline for slurry conveying according to claim 4, characterized in that: It also includes an arc-shaped piece (9), and each of the arc-shaped frames (52) has an arc-shaped piece (9) fixedly connected to its bottom.

6. A feeding and sealing device for connecting a high-pressure pipeline for slurry conveying according to claim 5, characterized in that: It also includes a fixing strip (10), which is fixed to the bottom of the fixing frame (3). There are two fixing strips (10), each of which is located between the two clamping frames (84) in each group. Several balls (11) are rotatably connected to both fixing strips (10).

7. A process for a feeding and sealing device for connecting a high-pressure pipeline for slurry conveying according to claim 6, the process comprising the following steps: Step 1: The staff first holds the handle (2), and places the bottom of the arc frame (52) against the top of the connection between the two pipes (1). The staff then presses the handle down so that the pipe (1) is located between the fixed frame (3) and the arc frame (52). Step 2: The staff starts the electric push rod (81). When the electric push rod (81) extends, it will drive the two sets of inclined plates (82) to move closer to each other. The movement of the inclined plates (82) will push the clamping frame (84) down, and the two sets of clamping frames (84) will clamp the pipe (1). Step 3: Then, the staff moves along the pipe (1) and aligns the heating nozzle (55) with the interface of the pipe (1). The staff continues to press the handle frame (2) down, so that the heating nozzle (55) is close to the pipe (1). The liquid in the hydraulic tank (61) enters the hydraulic pipe (63) through the connecting pipe (64). The heating nozzle (55) slides down in the arc frame (52). The push plate (721) moves to push the melted polyethylene liquid in the storage tank (72) into the heating nozzle (55) through the heat preservation pipe (73). Step 4: The staff loosens the handle (2), the magnetic block (65) moves and drives the sliding frame (54) and the heating nozzle (55) to reset. Finally, the staff lifts the handle (2) to detach the device from the pipe (1).

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