A kind of MPP power pipe auxiliary welding tool

Abstract

The present invention discloses an auxiliary welding tool for MPP electric pipes, which belongs to the field of electric power construction, and includes a base, a fixed clamp and a movable clamp, wherein the fixed clamp is fixedly mounted on a guide rod, and the movable clamp is slidably mounted on the guide rod; the fixed clamp and the movable clamp both include an upper clamp and a lower clamp; a telescopic drive assembly is provided on a bottom plate close to one side of the movable clamp, and the telescopic drive assembly includes a telescopic mechanism, one end of the telescopic mechanism is fixedly connected with a sleeve, a push rod is connected through the sleeve, a piston is provided on the push rod, and a spring is provided on one side of the piston; a support plate is provided on the upper part of the sleeve, and a travel switch is installed at one end of the support plate; and an end milling tool and an electric heating plate are also included. The present invention uses a travel switch to control the telescopic distance of the telescopic drive assembly, so as to achieve consistency in the butt joint force when two sections of MPP electric pipes are welded, which not only ensures the consistency of welding quality, but also reduces the labor intensity of operators.

Description

Technical Field

[0001] The invention belongs to the field of electric power construction, and in particular relates to an MPP electric power pipe auxiliary welding tool. Background Art

[0002] In power engineering construction, MPP (modified polypropylene) power pipes are widely used in the protection and laying of power cables due to their excellent insulation performance, corrosion resistance and high mechanical strength. Especially in the fields of urban underground power grid transformation and high-voltage transmission line laying, MPP power pipes are important infrastructure materials, and their connection quality is directly related to the safety and stability of the entire power system.

[0003] Traditionally, the connection method of MPP power pipes mostly adopts hot melt welding technology, which heats the two ends of the power pipe to a molten state and then quickly connects them, forming a strong molecular chain bond after cooling, thereby achieving seamless connection. However, in the actual construction process, since the length of a single section of MPP power pipe is usually 6 meters, multiple welding is required when laying over a long distance, and the existing hot melt welding machines are mostly hand-cranked structures. Although this structure simplifies the welding process to a certain extent, it is highly dependent on operation and has significant limitations.

[0004] Specifically, the hand-cranked hot-melt butt welding machine uses a worker to manually crank the hand wheel to drive the internal screw mechanism to drive the movable clamp to move along the axial direction of the power pipe to adjust the docking position and docking strength between the two sections of the power pipe. This operation method is highly dependent on the worker's operating skills and experience. It is difficult for different workers or the same worker to maintain consistent operating strength and speed at different times, resulting in differences in the tightness and uniformity of the docking each time. This difference not only affects the quality of the welded joint, but may also cause leakage, water seepage and other problems during subsequent use due to loose welding, posing a potential threat to power safety.

[0005] In addition, hand-cranked equipment can easily cause worker fatigue during long-term, high-intensity construction processes, increasing the risk of operational errors. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an MPP power pipe auxiliary welding tool to solve the problem that it is difficult to ensure the consistency when a hand-cranked hot-melt butt welding machine welds the MPP power pipe, thereby affecting the quality of the welded joint.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An MPP power pipe auxiliary welding tool comprises a base, a fixed clamp and a movable clamp, wherein the base comprises two groups of base plates, both ends of the base plates are fixedly connected with columns, and the columns of the two base plates are connected by a guide rod; the fixed clamp is fixedly installed on the guide rod, and the movable clamp is slidably installed on the guide rod; the fixed clamp and the movable clamp both comprise an upper clamp and a lower clamp, one end of the upper clamp and the lower clamp are pivotally connected, and the other end is connected by a bolt, and an extension plate is provided at the lower part of the lower clamp of the movable clamp; a telescopic drive assembly is provided on the base plate close to one side of the movable clamp, and the telescopic drive assembly comprises a telescopic mechanism, one end of the telescopic mechanism is fixedly connected with a sleeve, a push rod is connected through the sleeve, one end of the push rod is abutted against the extension plate, a piston is provided on the push rod, the piston is gap-mounted inside the sleeve, and a spring is provided on one side of the piston; a support plate is provided on the upper part of the sleeve, a travel switch is installed at one end of the support plate, and the travel switch is electrically connected to the telescopic mechanism; an end milling tool and an electric heating plate are also included.

[0009] Furthermore, the telescopic mechanism includes a pneumatic cylinder, a hydraulic cylinder or an electric push rod.

[0010] Furthermore, a square tube is provided on the upper part of the sleeve, and the support plate is slidably installed inside the square tube. A locking bolt is threadedly connected to the upper part of the square tube, and the lower end of the locking bolt is abutted against the upper surface of the support plate; scale lines are provided on the upper part of the support plate, and the scale lines represent distances or force values. When the scale lines are distances, the force exerted when two sections of MPP power pipes are docked is converted according to Hooke's law, that is, F=kx, wherein F represents the force exerted on the end faces when the two sections of MPP power pipes are docked, k represents the elastic coefficient of the spring, and x represents the distance from the end of the push rod to the travel switch (that is, the value shown by the scale lines); when the scale lines are force values, the above calculation results are directly marked as scale values ​​according to Hooke's law.

[0011] Furthermore, a first clamping groove is provided on both sides of the upper hoop and the lower hoop, a plurality of slips are provided inside the upper hoop and the lower hoop, a clamping block is provided on the outside of the slip, a second clamping groove is provided on the inside of the slip, the clamping block of the outermost slip is clamped in the first clamping groove, and the clamping block of the inner slip is clamped in the second clamping groove of the outer slip, the diameters of the multiple slips match various specifications of MPP power pipes, and a rubber pad is provided in the middle of the slip.

[0012] Furthermore, the end milling tool includes a casing, first support arms are provided on both sides of the casing, a driving gear and a driven gear that are meshed with each other are rotatably connected inside the casing, a motor is installed outside the casing, the output shaft of the motor is connected to the rotating shaft of the driving gear, and a milling cutter is provided on each side of the driven gear; second support arms are provided on both sides of the electric heating plate, U-shaped frames are provided at both ends of the first support arm, one end of one of the U-shaped frames and one of the second support arms are fixedly connected with a sleeve, the sleeve on the U-shaped frame is rotatably mounted on a guide rod, the sleeve on the second support arm is rotatably mounted on another guide rod, another U-shaped frame and another second support arm are fixedly connected with a pad at one end, and after the end milling tool or the electric heating plate is flipped over, the pad is supported on the guide rod.

[0013] Furthermore, a T-slot is provided on the shaft sleeve, and the T-slot includes a horizontal guide groove and a flip limit groove arranged in the middle of the horizontal guide groove and extending upward. A limit pin is threadedly connected to the guide rod, and the limit pin is arranged in the T-slot; when the end milling tool or the electric heating plate is flipped to the use state, the limit pin is located in the horizontal guide groove; when the end milling tool or the electric heating plate is flipped to the idle state, the limit pin is located at the upper end of the flip limit groove, limiting the flip angle of the end milling tool or the electric heating plate.

[0014] Furthermore, it also includes a pipe orifice shaping component, which is detachably arranged at the end of the MPP power pipe. The pipe orifice shaping component includes two semicircular clamps, and the two sides of the two semicircular clamps are connected by bolts. A plurality of support arms are provided on one side of the clamp, and one end of the support arm is threadedly connected with a tightening screw.

[0015] Furthermore, the clamp is provided with a through groove, and the support arm is movably installed inside the through groove; the clamp is also provided with a sliding groove in the radial direction, the sliding groove is connected to the through groove, and a plurality of sliders are slidably connected to the upper part of the sliding groove, and an adjusting bolt is threadedly connected to the slider, and the lower end of the adjusting bolt is against the support arm.

[0016] Furthermore, it also includes a plurality of support frames, the lower part of which is provided with a support leg, the support frame is supported on the MPP power pipe, and the lower part of the support leg is threadedly connected with a threaded adjustment rod.

[0017] Furthermore, a plurality of rollers are rotatably connected to both sides of the support frame, and the rollers on both sides are in a V-shaped structure.

[0018] The beneficial effects of the present invention are:

[0019] 1) The present invention uses a travel switch to control the telescopic distance of the telescopic drive assembly, thereby achieving consistency in the butt joint force when two sections of MPP power pipes are welded, which not only ensures the consistency of welding quality, but also reduces the labor intensity of operators.

[0020] 2) The position of the support plate for installing the travel switch is adjustable, which is convenient for adjusting the butt joint force when welding two sections of MPP power pipes. It is suitable for welding MPP power pipes of different specifications and requirements.

[0021] 3) Multiple sets of slips with different inner diameters are arranged inside the fixed clamp and the movable clamp to achieve clamping of MPP power pipes of different specifications during welding, and rubber pads are arranged inside the slips, which not only enhances the friction between the fixed clamp and the movable clamp and the MPP power pipe, but also prevents the fixed clamp or the movable clamp from damaging the surface of the MPP power pipe.

[0022] 4) The end milling tool and the electric heating plate are set on the guide rod, and the shaft sleeve is used to rotate and connect with the guide rod. When using, the end milling tool or the electric heating plate can be turned over in diameter, which avoids the traditional manual disassembly and assembly operations, reduces the labor intensity of the operators, and improves the efficiency of MPP power pipe welding.

[0023] 5) By setting up the pipe mouth shaping component and using the tightening screw at the end of the support arm to round the deformed pipe mouth, the quality of MPP power pipe welding is ensured.

[0024] 6) A through groove is provided on the clamp of the pipe mouth shaping assembly, and the support arm is installed inside the through groove, so that the axial and radial position of the support arm in the clamp can be adjusted, and the shaping range of the pipe mouth shaping assembly is expanded. A slide groove is provided in the radial direction of the clamp, and a plurality of sliders are slidably connected on the slide groove, and an adjusting bolt is threadedly connected on the slider to facilitate fixing the support arm after the position is adjusted.

[0025] 7) The MPP power pipe is supported by a support frame to avoid warping of the middle part of the MPP power pipe due to the force on the end. The resistance of the MPP power pipe during welding is reduced by arranging rollers in a V shape on the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a usage status diagram of an MPP power pipe auxiliary welding tooling of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of an MPP power pipe auxiliary welding tooling of the present invention.

[0028] Figure 3 It is a schematic diagram of a base in an MPP power pipe auxiliary welding tooling of the present invention.

[0029] Figure 4 It is a schematic diagram of a telescopic drive component in an MPP power pipe auxiliary welding tooling of the present invention.

[0030] Figure 5It is a schematic diagram of a movable clamp in an MPP power pipe auxiliary welding tooling of the present invention.

[0031] Figure 6 It is a schematic diagram of an electric heating plate in an MPP power pipe auxiliary welding tooling of the present invention.

[0032] Figure 7 This is an MPP power pipe auxiliary welding tool of the present invention. Figure 6 Enlarged view of point A in the middle.

[0033] Figure 8 It is a schematic diagram of the interior of an end face milling tool in an MPP power pipe auxiliary welding tooling of the present invention.

[0034] Fig. 9 It is a schematic diagram of a pipe orifice shaping component in an MPP power pipe auxiliary welding tooling of the present invention.

[0035] Fig.10 It is a schematic diagram of a support frame in an MPP power pipe auxiliary welding tooling of the present invention.

[0036] In the figure, 1, base; 11, bottom plate; 12, column; 13, guide rod; 14, limit pin; 2, fixed clamp; 3, movable clamp; 31, upper clamp; 32, lower clamp; 33, extension plate; 34, first clamping groove; 35, slip; 36, clamping block; 37, second clamping groove; 38, rubber pad; 4, telescopic drive assembly; 41, telescopic mechanism; 42, sleeve; 43, push rod; 44, spring; 45, piston; 46, square tube; 47, locking bolt; 48, support plate; 49, travel switch; 5, end milling tool; 51. Casing; 52. Driving gear; 53. Driven gear; 54. Motor; 55. Milling cutter; 56. First support arm; 57. U-shaped frame; 58. Bushing; 581. Turning limit groove; 582. Horizontal guide groove; 59. Pad; 6. Electric heating plate; 61. Second support arm; 7. Nozzle shaping assembly; 71. Clamp; 72. Through groove; 73. Slide; 74. Support arm; 75. Tightening screw; 76. Slider; 77. Adjusting bolt; 8. Support frame; 81. Support leg; 82. Threaded adjustment rod; 83. Roller. DETAILED DESCRIPTION

[0037] The following will be combined with the attached Figure 1-Figure 10 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] like Figure 1 , Figure 2 As shown, an MPP power pipe auxiliary welding tool comprises a base 1, a fixed clamp 2, and a movable clamp 3. Figure 3 As shown, the base 1 includes two sets of bottom plates 11, and columns 12 are fixedly connected at both ends of the bottom plates 11. The columns 12 of the two bottom plates 11 are connected by a guide rod 13; the fixed clamp 2 is fixedly installed on the guide rod 13, and the movable clamp 3 is slidably installed on the guide rod 13, so that the movable clamp 3 slides left and right on the guide rod 13 to achieve the docking of two sections of MPP power pipes; Figure 5 As shown, the fixed hoop 2 and the movable hoop 3 both include an upper hoop 31 and a lower hoop 32, one end of the upper hoop 31 and the lower hoop 32 are pivotally connected, and the other end is connected by bolts, and an extension plate 33 is provided at the lower part of the lower hoop 32 of the movable hoop 3; a telescopic drive assembly 4 is provided on the bottom plate 11 close to one side of the movable hoop 3, as shown in FIG. Figure 4 As shown, the telescopic drive assembly 4 includes a telescopic mechanism 41, one end of which is fixedly connected to a sleeve 42, a push rod 43 is connected through the sleeve 42, one end of the push rod 43 is against the extension plate 33, a piston 45 is provided on the push rod 43, the piston 45 is installed in the sleeve 42 with a gap, and a spring 44 is provided on one side of the piston 45; a support plate 48 is provided on the upper part of the sleeve 42, and a travel switch 49 is installed at one end of the support plate 48, and the travel switch 49 is electrically connected to the telescopic mechanism 41; as shown in FIG. Figure 2 As shown, an end milling tool 5 and an electric heating plate 6 are also included.

[0040] The telescopic mechanism 41 includes a cylinder, a hydraulic cylinder or an electric push rod 43. Figure 4 As shown, in this embodiment, the telescopic mechanism 41 adopts a hydraulic cylinder.

[0041] like Figure 4As shown, a square tube 46 is provided on the upper part of the sleeve 42, and the support plate 48 is slidably installed inside the square tube 46. A locking bolt 47 is threadedly connected to the upper part of the square tube 46, and the lower end of the locking bolt 47 abuts against the upper surface of the support plate 48, so as to adjust the distance between the travel switch 49 and the end face of the push rod 43, thereby adjusting the formation of the telescopic drive assembly 4 and realizing the adjustment of the docking force of the two sections of the MPP power pipe; in order to facilitate the intuitive judgment of the docking force of the two sections of the MPP power pipe, a scale line is provided on the upper part of the support plate 48, and the scale line represents the distance or force value. When the scale line is the distance, the force of the two sections of the MPP power pipe when docking is converted according to Hooke's law, that is, F=kx, wherein F represents the force on the end face when the two sections of the MPP power pipe are docked, k represents the elastic coefficient of the spring 44, and x represents the distance from the end of the push rod 43 to the travel switch 49 (that is, the value shown by the scale line); when the scale line is the force value, the above calculation result can be directly marked as the scale value according to Hooke's law.

[0042] like Figure 5 As shown, first clamping grooves 34 are provided on both sides of the upper hoop 31 and the lower hoop 32, and a plurality of slips 35 are provided inside the upper hoop 31 and the lower hoop 32. A clamping block 36 is provided on the outer side of the slip 35, and a second clamping groove 37 is provided on the inner side of the slip 35. The clamping block 36 of the outermost slip 35 is clamped in the first clamping groove 34, and the clamping block 36 of the inner slip 35 is clamped in the second clamping groove 37 of the outer slip 35. The diameters of the plurality of slips 35 match various specifications of MPP power pipes. A rubber pad 38 is provided in the middle of the slip 35. The rubber pad 38 not only enhances the friction between the fixed clamp 2 and the movable clamp 3 and the MPP power pipe, but also prevents the fixed clamp 2 or the movable clamp 3 from damaging the surface of the MPP power pipe.

[0043] like Figure 8 As shown, the face milling tool 5 includes a housing 51, and first support arms 56 are provided on both sides of the housing 51. A driving gear 52 and a driven gear 53 that are meshed with each other are rotatably connected inside the housing 51. A motor 54 is installed outside the housing 51. The output shaft of the motor 54 is connected to the rotating shaft of the driving gear 52. A milling cutter 55 is provided on each side of the driven gear 53. Figure 6As shown, second support arms 61 are provided on both sides of the electric heating plate 6, and U-shaped frames 57 are provided at both ends of the first support arms 56, one end of one of the U-shaped frames 57 and one of the second support arms 61 are fixedly connected with a sleeve 58, the sleeve 58 on the U-shaped frame 57 is rotatably mounted on a guide rod 13, the sleeve 58 on the second support arm 61 is rotatably mounted on another guide rod 13, and one end of the other U-shaped frame 57 and the other second support arm 61 are fixedly connected with a pad 59, and after the end milling tool 5 or the electric heating plate 6 is flipped, the pad 59 is supported on the guide rod 13; in the present invention, the end milling tool 5 and the electric heating plate 6 are arranged on the guide rod 13 and are rotatably connected to the guide rod 13, and the end milling tool 5 or the electric heating plate 6 can be flipped in diameter when in use, thereby avoiding the traditional disassembly and assembly process, reducing the labor intensity of the operators, and improving the efficiency of MPP power pipe welding.

[0044] like Figure 7 As shown, a T-slot is provided on the shaft sleeve 58, and the T-slot includes a horizontal guide groove 582 and a flip limit groove 581 arranged in the middle of the horizontal guide groove 582 and extending upward. A limit pin 14 is threadedly connected to the guide rod 13, and the limit pin 14 is arranged in the T-slot; when the end milling tool 5 or the electric heating plate 6 is flipped to the use state, the limit pin 14 is located in the horizontal guide groove 582, and does not affect the horizontal movement of the end milling tool 5 or the electric heating plate 6 on the guide rod 13; when the end milling tool 5 or the electric heating plate 6 is flipped to the idle state, the limit pin 14 is located at the upper end of the flip limit groove 581, which limits the flip angle of the end milling tool 5 or the electric heating plate 6, and avoids the end milling tool 5 or the electric heating plate 6 from colliding with the ground after flipping.

[0045] like Figure 1 As shown, it also includes a pipe orifice shaping component 7, which is detachably arranged at the end of the MPP power pipe. Fig. 9 As shown, the pipe mouth shaping assembly 7 includes two semicircular clamps 71, and the two sides of the two semicircular clamps 71 are connected by bolts. One side of the clamp 71 is provided with a plurality of support arms 74, and one end of the support arm 74 is threadedly connected with a tightening screw 75. According to the deformation of the end face of the MPP power pipe, the tightening screw 75 is used to tighten the corresponding position of the MPP power pipe to shape the pipe mouth, thereby ensuring the quality of the MPP power pipe welding.

[0046] like Fig. 9As shown, the clamp 71 is provided with a through groove 72, and the support arm 74 is movably installed inside the through groove 72, so that the axial and radial positions of the support arm 74 in the clamp 71 can be adjusted, thereby expanding the shaping range of the pipe orifice shaping assembly 7; the clamp 71 is also provided with a slide groove 73 in the radial direction, and the slide groove 73 is connected to the through groove 72. A plurality of sliders 76 are slidably connected to the upper part of the slide groove 73, and an adjusting bolt 77 is threadedly connected to the slider 76. The lower end of the adjusting bolt 77 abuts against the support arm 74, so as to fix the support arm 74 after the position is adjusted.

[0047] like Figure 1 As shown, it also includes several support frames 8, such as Fig.10 As shown, the support frame 8 is provided with a support leg 81 at the lower part, and the support frame 8 is supported on the MPP power pipe, thereby avoiding warping and deformation of the middle part of the MPP power pipe due to the force on the end; the lower part of the support leg 81 is threadedly connected with a threaded adjustment rod 82, which is used to adjust the height of each support leg 81 of the support frame 8 to ensure the horizontality of the support frame 8.

[0048] like Fig.10 As shown, a plurality of rollers 83 are rotatably connected to both sides of the support frame 8, and the rollers 83 on both sides are in a V-shaped structure, which reduces the resistance during welding of the MPP power pipe.

[0049] When welding the MPP power pipe, first place multiple support frames 8 on both sides of the tooling, place the power pipe on the support frames 8, then use the fixed clamp 2 to clamp one end of the welded MPP power pipe, and use the movable clamp 3 to clamp one end of the MPP power pipe to be welded, flip the end milling tool 5 to the working state, and start the motor 54 and the telescopic mechanism 41, use the milling cutter 55 to mill the end faces of the two sections of the power pipe to make it smooth, and then wipe the end faces clean with a rag dipped in alcohol. Subsequently, flip the end milling tool 5 to the idle state, and flip the electric heating plate 6 to the working state (during the end milling process, the electric heating plate 6 can be turned on for preheating), and drive the telescopic mechanism 41 to extend a certain distance again, so that the end face of the power pipe contacts the electric heating plate 6, and the end face of the power pipe is heated. After the heating is completed, the telescopic mechanism 41 retracts, flips the electric heating plate 6 to the idle state, and quickly starts the telescopic mechanism 41 again. The telescopic mechanism 41 drives the power pipe to be welded to move axially for welding, so that the two sections The power tubes are against each other and produce flanges. During this process, the telescopic mechanism 41 drives the push rod 43 through the sleeve 42 to push the movable clamp 3 to move. When the two sections of the MPP power tubes are in contact, the spring 44 generates elastic force and begins to be compressed. The push rod 43 extends to the other end of the sleeve 42 under the action of the reaction force. When the push rod 43 contacts the switch, the telescopic mechanism 41 stops telescoping and maintains pressure for a period of time. After the pressure maintenance is completed, the weld is naturally cooled, and the flange at the weld is removed to complete the welding operation of the two sections of the MPP power tubes.

[0050] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the protection scope of the present invention.

Claims

1. An MPP power pipe auxiliary welding tool, comprising a base, a fixed clamp and a movable clamp, wherein the base comprises two sets of bottom plates, both ends of the bottom plates are fixedly connected with columns, and the columns of the two bottom plates are connected by a guide rod; the fixed clamp is fixedly installed on the guide rod, and the movable clamp is slidably installed on the guide rod; the fixed clamp and the movable clamp both comprise an upper clamp and a lower clamp, one end of the upper clamp and the lower clamp are pivotally connected, and the other end is connected by bolts, and an extension plate is provided at the lower part of the lower clamp of the movable clamp; characterized in that, A telescopic drive assembly is provided on the bottom plate near one side of the movable hoop, and the telescopic drive assembly includes a telescopic mechanism, one end of the telescopic mechanism is fixedly connected to a sleeve, a push rod is connected through the sleeve, one end of the push rod is against the extension plate, a piston is provided on the push rod, the piston is installed inside the sleeve with a gap, and a spring is provided on one side of the piston; a support plate is provided on the upper part of the sleeve, a travel switch is installed on one end of the support plate, and the travel switch is electrically connected to the telescopic mechanism; an end milling tool and an electric heating plate are also included; a square tube is provided on the upper part of the sleeve, and the support plate is slidably installed Inside the square tube, a locking bolt is threadedly connected to the upper part of the square tube, and the lower end of the locking bolt is against the upper surface of the support plate; scale lines are provided on the upper part of the support plate, and the scale lines represent distances or force values. When the scale lines are distances, the force when two sections of MPP power tubes are docked is converted according to Hooke's law, that is, F=kx, wherein F represents the force exerted on the end faces when the two sections of MPP power tubes are docked, k represents the elastic coefficient of the spring, and x represents the distance from the end of the push rod to the travel switch; when the scale lines are force values, the calculation results are directly marked as scale values ​​according to Hooke's law.

2. The MPP power pipe auxiliary welding tool according to claim 1 is characterized in that: The telescopic mechanism comprises a cylinder, a hydraulic cylinder or an electric push rod.

3. The MPP power pipe auxiliary welding tool according to claim 1 is characterized in that: A first clamping groove is provided on both sides of the upper hoop and the lower hoop, and a plurality of slips are provided inside the upper hoop and the lower hoop. A clamping block is provided on the outside of the slip, and a second clamping groove is provided on the inside of the slip. The clamping block of the outermost slip is clamped in the first clamping groove, and the clamping block of the inner slip is clamped in the second clamping groove of the outer slip. The diameters of the multiple slips match MPP power pipes of various specifications, and a rubber pad is provided in the middle of the slip.

4. The MPP power pipe auxiliary welding tool according to claim 1 is characterized in that: The end milling tool comprises a casing, first support arms are provided on both sides of the casing, a driving gear and a driven gear meshing with each other are rotatably connected inside the casing, a motor is installed outside the casing, the output shaft of the motor is connected to the rotating shaft of the driving gear, and a milling cutter is provided on each side of the driven gear; second support arms are provided on both sides of the electric heating plate, U-shaped frames are provided at both ends of the first support arm, one end of one of the U-shaped frames and one of the second support arms are fixedly connected with a sleeve, the sleeve on the U-shaped frame is rotatably mounted on a guide rod, the sleeve on the second support arm is rotatably mounted on another guide rod, another U-shaped frame and one end of another second support arm are fixedly connected with a pad, and after the end milling tool or the electric heating plate is flipped over, the pad is supported on the guide rod.

5. The MPP power pipe auxiliary welding tool according to claim 4 is characterized in that: The shaft sleeve is provided with a T-slot, and the T-slot includes a horizontal guide groove and a flip limit groove arranged in the middle of the horizontal guide groove and extending upward. The guide rod is threadedly connected with a limit pin, and the limit pin is arranged in the T-slot; when the end milling tool or the electric heating plate is flipped to a use state, the limit pin is located in the horizontal guide groove; when the end milling tool or the electric heating plate is flipped to an idle state, the limit pin is located at the upper end of the flip limit groove, limiting the flip angle of the end milling tool or the electric heating plate.

6. The MPP power pipe auxiliary welding tool according to claim 1 is characterized in that: It also includes a pipe orifice shaping component, which is detachably arranged at the end of the MPP power pipe. The pipe orifice shaping component includes two semicircular clamps, and the two sides of the two semicircular clamps are connected by bolts. A plurality of support arms are provided on one side of the clamp, and a tightening screw is threadedly connected to one end of the support arm.

7. The MPP power pipe auxiliary welding tool according to claim 6 is characterized in that: The clamp is provided with a through groove, and the support arm is movably installed inside the through groove; the clamp is also provided with a slide groove in the radial direction, the slide groove is connected with the through groove, and a plurality of sliders are slidably connected to the upper part of the slide groove, and an adjusting bolt is threadedly connected to the slider, and the lower end of the adjusting bolt is against the support arm.

8. The MPP power pipe auxiliary welding tool according to any one of claims 1 to 7, characterized in that: It also includes a plurality of support frames, the lower part of which is provided with support legs, the support frames are supported on the MPP power pipes, and the lower part of the support legs is threadedly connected with a threaded adjustment rod.

9. The MPP power pipe auxiliary welding tool according to claim 8, characterized in that: A plurality of rollers are rotatably connected to both sides of the support frame, and the rollers on both sides are in a V-shaped structure.

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