Hole melting device for pressure-resistant MPP electric power tube production

Abstract

The invention discloses a pressure-resistant MPP power tube production hole melting device which comprises a machine tool, an equipment box is mounted on the machine tool, a mounting cylinder is mounted on the side wall of the equipment box through a mounting bearing, a connecting rod is mounted on the inner side wall of the mounting cylinder through a connecting bearing, and relative rotation of the mounting cylinder and the connecting rod is achieved through the connecting bearing. One end of the connecting rod is provided with a ball screw, and the mounting cylinder and the ball screw are jointly provided with a tube locking assembly used for fixing an electric power tube; and a second motor is mounted on the inner bottom wall of the equipment box. The hole melting device has the advantages that the structural design of the hole melting device has high adaptability, the hole melting device can meet the production requirements of MPP electric power pipes of various specifications, hole melting machining of the electric power pipes of different inner diameters can be completed on the same equipment only through simple adjustment of the pipe locking assembly, frequent equipment replacement or complex tool adjustment is not needed, the production cost is reduced, and the production efficiency is improved. And the utilization rate of equipment and the production flexibility are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of production and processing of electric power pipes, and in particular to a melting hole device for producing pressure-resistant MPP electric power pipes. Background Art

[0002] In the field of modern power engineering, MPP power pipes are widely used due to their excellent performance. MPP power pipes have the characteristics of high strength, corrosion resistance, good insulation, etc., which can effectively protect power cables and ensure the safety and stability of power transmission. With the rapid development of the power industry, the demand for MPP power pipes is increasing, and at the same time, higher requirements are placed on their production quality and efficiency. In the production process of MPP power pipes, the fusion hole process is an extremely critical link. The quality of the fusion hole directly affects the subsequent connection, installation and overall performance of the power pipe.

[0003] The traditional MPP power pipe melting hole device has many limitations:

[0004] 1. In terms of fixing power pipes, most traditional devices use relatively simple mechanical structures or a single clamping method, which is difficult to accurately adapt to power pipes with different inner diameters. This often leads to loosening and offset of the power pipe during the melting process, which seriously affects the accuracy and roundness of the melting hole, thereby reducing product quality and increasing the defective rate. For example, some fixing devices only rely on fixtures of fixed size, and cannot achieve a good fixing effect for power pipes with slightly different sizes.

[0005] 2. The rotation drive mechanism is not perfect. When the traditional melting hole device drives the power tube to rotate, the power transmission is unstable and the speed fluctuation is easy to occur. This makes the melting holes unevenly distributed around the power tube and the depth inconsistent, which cannot meet the high-precision production standards. Moreover, unstable rotation will increase the wear and energy consumption of the equipment, reduce the service life and production efficiency of the equipment. For example, some devices use belt drive or simple gear drive, which are prone to slippage, tooth gap and other problems, affecting the stability of power transmission.

[0006] To this end, we propose a melting hole device for the production of pressure-resistant MPP power pipes to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to solve the problems in the prior art and to propose a melting hole device for producing a compression-resistant MPP power pipe.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A melting hole device for producing a pressure-resistant MPP power pipe comprises a machine tool, an equipment box is installed on the machine tool, a mounting cylinder is installed on the side wall of the equipment box through a mounting bearing, a connecting rod is installed on the inner side wall of the mounting cylinder through a connecting bearing, and the connecting bearing realizes the relative rotation of the mounting cylinder and the connecting rod, a ball screw is installed at one end of the connecting rod, and the ball screw penetrates the mounting cylinder and extends outward, and a locking tube assembly is installed on the mounting cylinder and the ball screw for fixing the power pipe;

[0010] A second motor is installed on the inner bottom wall of the equipment box, and a gear steering assembly is installed on the output shaft of the second motor for driving the installation cylinder to rotate;

[0011] A first motor is installed on the inner wall of the equipment box, and a clamping assembly is provided at the output end of the first motor. The adjustment state of the lock tube assembly and the lock tube state are adjusted by the clamping assembly. When the clamping assembly clamps the connecting rod, it drives the connecting rod to rotate, and the lock tube assembly adjusts to adapt to the inner diameter of the power tube. When the clamping assembly is not clamped with the connecting rod, the lock tube assembly clamps the power tube, and the lock tube assembly can rotate with the installation tube.

[0012] In the above-mentioned melting hole device for the production of pressure-resistant MPP power pipes, the pipe locking assembly includes two symmetrically arranged fixed cylinder seats, and the two fixed cylinder seats are fixedly connected to the outer side wall of the mounting cylinder, and the outer side wall of each fixed cylinder seat is rotatably connected to multiple push rods, and the two push rods at corresponding positions are rotatably connected to the pipe locking frame;

[0013] The ball screw is cooperatively connected with a moving cylinder seat, and a plurality of rotating rods are symmetrically rotatably connected to the moving cylinder seat, and each rotating rod is rotatably connected to a locking tube frame at a corresponding position.

[0014] In the above-mentioned melt hole device for producing pressure-resistant MPP power pipes, the gear steering assembly includes a first bevel gear and a second bevel gear, and the first bevel gear and the second bevel gear are meshed, and the first bevel gear is installed on the output shaft of the second motor, and the second bevel gear is installed on the mounting tube.

[0015] In the above-mentioned melting hole device for producing compression-resistant MPP power pipes, the end of the ball screw away from the equipment box is fixedly connected to a limit plate.

[0016] In the above-mentioned melting hole device for producing pressure-resistant MPP power pipes, the output end of the first motor is fixedly connected to a rotating fixed seat, and a limiting guide seat is fixedly connected to the rotating fixed seat. A pushing cylinder is installed in the rotating fixed seat, and an arc guide groove and an extension hole are provided on the limiting guide seat, and the arc guide groove and the extension hole are connected. The piston end of the pushing cylinder passes through the extension hole and is fixedly connected to a pushing column. Two locking frames are symmetrically rotatably connected to the inner side wall of the arc guide groove, and one end of the locking frame is located in the pushing column. The lower end of the connecting rod is fixedly connected to a locking cover, and the locking frame is clamped in the locking cover.

[0017] In the above-mentioned melting hole device for the production of pressure-resistant MPP power pipes, a limiting through hole is opened in the pushing column, and the locking frame includes a triangular plate, which is rotatably connected in the arc guide groove, one end of the triangular plate is fixedly connected to a driving column, and each driving column is located in the limiting through hole, and the other end of the triangular plate is fixedly connected to a locking column, and the locking column is clamped in the locking cover.

[0018] In the above-mentioned melting hole device for producing pressure-resistant MPP power pipes, a locking circular cavity and a circular notch are provided inside the locking cover, and the inner diameter of the circular notch is smaller than the inner diameter of the locking circular cavity.

[0019] In the above-mentioned melting hole device for the production of pressure-resistant MPP electric pipes, a movable limit groove is provided on the machine tool, a protective frame is installed on the machine tool, a working through groove is provided on the protective frame, an electric slide rail is installed inside the machine tool, an electric heating head is slidably connected to the electric slide rail, and the electric heating head passes through the movable limit groove and the working through groove in turn and extends upward.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The locking tube assembly is cleverly designed. Through the cooperation of multiple push rods, rotating rods, and adjustable movable barrel seats and ball screws, it can accurately adapt to MPP power tubes with different inner diameters, ensure that the locking tube frame fits tightly against its inner wall, and achieves stable and precise fixation, effectively avoiding shaking and displacement of the power tube during the melting hole process, thereby ensuring the accuracy and quality of the melting hole and improving the qualified rate of the product.

[0022] 2. The clamping assembly plays a key role in the adjustment of the locking tube assembly and the switching of the locking tube state. Through the coordinated operation of the push cylinder, the push column, the locking frame and the locking cover, the locking tube assembly can be effectively linked with the first motor during adjustment to achieve fast and accurate inner diameter adaptation; and it can be released in time when the locking tube and the follow-up state do not affect the rotation of the power tube driven by the installation cylinder, which greatly improves the working efficiency and flexibility of the entire device

[0023] 3. The combination of the second motor and the gear steering assembly provides a stable and powerful rotational power for the installation barrel. The precise meshing of the first bevel gear and the second bevel gear ensures the accuracy and efficiency of power transmission, so that the installation barrel can rotate around its own axis at a constant speed. This is not only conducive to uniformly performing melting hole operations on the circumference of the power pipe, avoiding problems such as irregular shape or inconsistent depth of the melting hole due to unstable rotation, but also can adapt to long-term and high-intensity production operation requirements, reduce equipment failures and maintenance costs, and improve production continuity and reliability.

[0024] 4. The mounting tube is connected to the equipment box through the mounting bearing. The connecting bearing ensures the stable rotation of the connecting rod in the mounting tube. This multi-bearing support structure effectively reduces the friction resistance and vibration during the rotation process, further improves the stability and accuracy of the rotation transmission, and helps to extend the service life of the equipment.

[0025] The structural design of the melt hole device has strong adaptability and can be compatible with the production needs of MPP power pipes of various specifications. The melt hole processing of power pipes with different inner diameters can be completed on the same equipment simply by adjusting the locking tube assembly. There is no need to frequently replace equipment or make complicated tooling adjustments, which reduces production costs and improves equipment utilization and production flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a melting hole device for producing a compression-resistant MPP power pipe proposed by the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the equipment box and the tube locking assembly in a melt hole device for producing a compression-resistant MPP power pipe proposed by the present invention, when the equipment box is cut open;

[0028] Figure 3 for Figure 2 Schematic diagram of the structure without the equipment box and gear steering assembly;

[0029] Figure 4 This is an enlarged view of the structure of the connecting rod part in a melting hole device for producing a compression-resistant MPP power pipe proposed by the present invention;

[0030] Figure 5 This is an enlarged structural diagram of the clamping assembly in a melting hole device for producing a compression-resistant MPP power pipe proposed by the present invention.

[0031] In the figure: 1 machine tool, 2 equipment box, 3 lock pipe rack, 4 movable limit groove, 5 electric heating head, 6 protection frame, 7 working through groove, 8 first motor, 9 second motor, 10 first bevel gear, 11 second bevel gear, 12 mounting bearing, 13 limit plate, 14 ball screw, 15 rotating rod, 16 pushing rod, 17 moving cylinder seat, 18 fixed cylinder seat, 19 mounting cylinder, 20 locking cover, 21 rotating fixed seat, 22 limit guide seat, 23 connecting rod, 24 connecting bearing, 25 pushing cylinder, 26 pushing column, 27 limit through hole, 28 locking frame, 29 locking circular cavity, 30 arc guide groove, 31 extension hole. DETAILED DESCRIPTION

[0032] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0033] Example

[0034] Reference Figure 1-5 A melting hole device for the production of a compression-resistant MPP electric pipe includes a machine tool 1, a movable limit groove 4 is provided on the machine tool 1, a protective frame 6 is installed on the machine tool 1, a working through groove 7 is provided on the protective frame 6, an electric slide rail is installed inside the machine tool 1, an electric heating head 5 is slidably connected to the electric slide rail, and the electric heating head 5 passes through the movable limit groove 4 and the working through groove 7 in turn and extends upward, and the cooperation between the electric slide rail and the electric heating head 5 inside the machine tool 1 enables the melting hole position to be flexibly adjusted in the axial direction of the electric pipe. The electric heating head 5 can move accurately to the designated position along the electric slide rail to melt the hole according to the preset melting hole spacing and number, without manual adjustment of the electric pipe or melting hole equipment, which greatly improves the automation degree and production efficiency of the melting hole operation. The movable limit groove 4 provided on the machine tool 1 and the working through groove 7 on the protective frame 6 provide stable guidance and limitation for the movement of the electric heating head, ensuring that the electric heating head always maintains the correct position and posture during the movement, avoiding the occurrence of melting hole errors or damage to the equipment due to the electric heating head deviating from the track. At the same time, the protective frame 6 also plays a certain safety protection role to ensure the safety of the operator. The overall architecture and transmission system design of the device reserve a certain space for subsequent technical upgrades or functional expansions. For example, the automatic control system can be easily integrated to realize the precise parameter setting, monitoring and adjustment of the melting hole process; or according to production needs, other auxiliary processing function modules can be added, such as cooling devices, waste cleaning devices, etc., to further improve the comprehensive performance of the equipment and production added value.

[0035] The machine tool 1 is provided with an equipment box 2, a mounting cylinder 19 is mounted on the side wall of the equipment box 2 through a mounting bearing 12, a connecting rod 23 is mounted on the inner wall of the mounting cylinder 19 through a connecting bearing 24, the connecting bearing 24 realizes the relative rotation of the mounting cylinder 19 and the connecting rod 23, a ball screw 14 is mounted on one end of the connecting rod 23, and the ball screw 14 passes through the mounting cylinder 19 and extends outward, a locking tube assembly is mounted on the mounting cylinder 19 and the ball screw 14, and is used to fix the power tube, and the locking tube assembly includes two symmetrically arranged fixing cylinders Seat 18, and two fixed cylinder seats 18 are fixedly connected to the outer side wall of the mounting cylinder 19, multiple push rods 16 are rotatably connected to the outer side wall of each fixed cylinder seat 18, and the two push rods 16 at corresponding positions are rotatably connected to the lock tube rack 3; the ball screw 14 is matched with a mobile cylinder seat 17, and the mobile cylinder seat 17 is symmetrically rotatably connected to multiple rotating rods 15, and each rotating rod 15 is rotatably connected to the lock tube rack 3 at the corresponding position, and the ball screw 14 is fixedly connected to the limit plate 13 at one end away from the equipment box 2.

[0036] A second motor 9 is installed on the inner bottom wall of the equipment box 2, and a gear steering assembly is installed on the output shaft of the second motor 9, which is used to drive the installation cylinder 19 to rotate. The gear steering assembly includes a first bevel gear 10 and a second bevel gear 11, and the first bevel gear 10 and the second bevel gear 11 are meshed, and the first bevel gear 10 is installed on the output shaft of the second motor 9, and the second bevel gear 11 is installed on the installation cylinder 19;

[0037] A first motor 8 is installed on the inner wall of the equipment box 2, and a clamping assembly is provided at the output end of the first motor 8. The adjustment state of the lock tube assembly and the lock tube state are adjusted by the clamping assembly. When the clamping assembly clamps the connecting rod 23, it drives the connecting rod 23 to rotate, and the lock tube assembly adjusts to adapt to the inner diameter of the power tube. When the clamping assembly is not clamped with the connecting rod 23, the lock tube assembly clamps the power tube, and the lock tube assembly can rotate with the installation tube 19. The clamping assembly includes a rotating fixed seat 21, and the rotating fixed seat 21 is fixedly connected to the output end of the first motor 8. A limited guide seat 22 is fixedly connected to the rotating fixed seat 21. A pushing cylinder 25 is installed in the rotating fixed seat 21. An arc guide groove 30 and an extension hole 31 are opened on the limit guide seat 22, and the arc guide groove 30 is connected to the extension hole 31. The piston end of the pushing cylinder 25 passes through the extension hole 31 and is fixed It is fixedly connected with a pushing column 26, and two locking frames 28 are symmetrically connected to the inner side wall of the arc-shaped guide groove 30, and one end of the locking frame 28 is located in the pushing column 26. The lower end of the connecting rod 23 is fixedly connected with the locking cover 20, and the locking frame 28 is clamped in the locking cover 20. A limiting through hole 27 is provided in the pushing column 26. The locking frame 28 includes a triangular plate 2801, which is rotatably connected in the arc-shaped guide groove 30, one end of the triangular plate 2801 is fixedly connected with a driving column 2802, and each driving column 2802 is located in the limiting through hole 27, the other end of the triangular plate 2801 is fixedly connected with a locking column 2803, and the locking column 2803 is clamped in the locking cover 20. A locking circular cavity 29 and a circular notch are provided in the locking cover 20, and the inner diameter of the circular notch is smaller than the inner diameter of the locking circular cavity 29.

[0038] Adjustment of the locking tube assembly: When it is necessary to fix MPP power tubes with different inner diameters, start the first motor 8. The clamping assembly at the output end of the first motor 8 is clamped with the connecting rod 23 at this time. The first motor 8 drives the ball screw 14 to rotate through the clamping assembly to adjust the locking tube assembly. When the ball screw 14 rotates, the mobile cylinder seat 17 connected thereto will move along the ball screw 14. The multiple rotating rods 15 symmetrically connected to the mobile cylinder seat 17 will change their angles as the mobile cylinder seat 17 moves, thereby pushing the locking tube frame 3 rotationally connected to the rotating rod 15 to move. The locking tube frame 3 cooperates with the pushing rod 16 rotationally connected to the outer wall of the fixed cylinder seat 18 to achieve adaptive adjustment to power tubes with different inner diameters, so that the locking tube frame 3 can fit the inner wall of the power tube.

[0039] The locking tube state is achieved: when the locking tube assembly is adjusted to adapt to the inner diameter of the power tube, the clamping assembly at the output end of the first motor 8 releases the connecting rod 23. At this time, the locking tube assembly is in a state where it can rotate with the mounting tube 19. At the same time, the locking tube frame 3 tightly clamps the power tube to complete the fixation of the power tube.

[0040] Start the second motor 9, and the gear steering assembly installed on the output shaft of the second motor 9 starts to work. The first bevel gear 10 (installed on the output shaft of the second motor 9) and the second bevel gear 11 (installed on the mounting tube 19) in the gear steering assembly are meshed with each other. Driven by the second motor 9, the mounting tube 19 can rotate around its own axis through gear transmission, thereby driving the locking tube assembly fixed on the mounting tube 19 and clamped with the power tube and the power tube to rotate together.

[0041] An electric slide rail is installed inside the machine tool 1. When a melting hole operation is required, the electric heating head 5 slidably connected to the electric slide rail will move along the electric slide rail. The electric heating head 5 sequentially passes through the movable limit groove 4 opened on the machine tool 1 and the working groove 7 opened on the protective frame 6 and extends upward. After reaching the appropriate position, the melting hole operation is performed on the MPP power tube fixed and rotated by the above steps.

[0042] The clamping state of the clamping assembly (when the lock tube assembly is adjusted): When the lock tube assembly needs to be adjusted, the piston end of the push cylinder 25 is extended, and the push column 26 moves along the extension hole 31 under the push of the push cylinder 25. The limit through hole 27 in the push column 26 will push the driving column 2802 of the locking frame 28, so that the locking frame 28 rotates with its rotation connection point in the arc guide groove 30 as the axis, thereby causing the locking column 2803 of the locking frame 28 to be clamped into the locking cover 20 (such as Figure 5 As shown), at this time, the clamping assembly clamps the connecting rod 23, and when the first motor 8 rotates, it can drive the connecting rod 23 to rotate, and the connecting rod 23 drives the ball screw 14 to rotate, and the connecting rod 23 and the installation cylinder 19 rotate relative to each other. The installation cylinder 19 is stationary relative to the equipment box 2 under the limiting action of the gear steering assembly, and the first motor 8 drives the locking tube assembly to adjust to achieve the clamping of the power tube. At the same time, a locking circular cavity 29 and a circular notch are provided in the locking cover 20, and the inner diameter of the circular notch is smaller than the inner diameter of the locking circular cavity 29. This structure helps to better achieve the clamping fit between the locking frame 28 and the locking cover 20, and ensure the stability of the connection.

[0043] The clamping assembly is in the released state (when the locking tube assembly locks the tube and rotates with it): the output end of the first motor 8 is fixedly connected to the rotating fixed seat 21, and the pushing cylinder 25 is installed in the rotating fixed seat 21. When the locking tube assembly and the power tube are to be rotated with the installation cylinder 19, the piston end of the pushing cylinder 25 moves downward, and at this time, one end of the two locking frames 28 symmetrically connected to rotate on the inner wall of the arc-shaped guide groove 30 is located in the pushing column 26, and the locking frames 28 are not clamped in the locking cover 20 fixedly connected to the lower end of the connecting rod 23, that is, the clamping assembly is in the released state, and the first motor 8 will not drive the connecting rod 23 to rotate when rotating. At this time, the second motor 9 and the gear steering assembly can drive the installation tube 19, the locking tube assembly and the power tube to rotate.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A melting hole device for the production of compression-resistant MPP power pipes, characterized by: The utility model comprises a mounting cylinder (19) which is horizontally mounted on the equipment box (2) via a mounting bearing (12); a connecting rod (23) is mounted on the inner side wall of the mounting cylinder (19) via a connecting bearing (24); the connecting bearing (24) enables relative rotation between the mounting cylinder (19) and the connecting rod (23); a ball screw (14) is mounted on one end of the connecting rod (23); the ball screw (14) penetrates the mounting cylinder (19) and extends outward; a locking tube assembly is mounted on the mounting cylinder (19) and the ball screw (14) for fixing the power tube; A second motor (9) is mounted on the inner bottom wall of the equipment box (2); a gear steering assembly is mounted on the output shaft of the second motor (9) for driving the mounting cylinder (19) to rotate; The first motor (8) is mounted on the inner wall of the equipment box (2). The output end of the first motor (8) is provided with a clamping assembly, and the adjustment state and the locking state of the locking tube assembly are adjusted by the clamping assembly. When the clamping assembly clamps the connecting rod (23), the connecting rod (23) is driven to rotate. The locking tube assembly is adjusted to adapt to the inner diameter of the power tube. When the clamping assembly is not clamped with the connecting rod (23), the locking tube assembly clamps the power tube. The locking tube assembly can rotate with the installation tube (19).

2. A melting hole device for producing a compression-resistant MPP power pipe according to claim 1, characterized in that: The locking tube assembly comprises two symmetrically arranged fixed tube seats (18), and the two fixed tube seats (18) are fixedly connected to the outer side wall of the mounting tube (19), and a plurality of push rods (16) are rotatably connected to the outer side wall of each fixed tube seat (18), and the locking tube frame (3) is rotatably connected to the two push rods (16) at corresponding positions; The ball screw (14) is cooperatively connected with a movable barrel seat (17), and a plurality of rotating rods (15) are symmetrically rotatably connected to the movable barrel seat (17), and each rotating rod (15) is rotatably connected to a locking tube frame (3) at a corresponding position.

3. A melting hole device for producing a compression-resistant MPP power pipe according to claim 1, characterized in that: The gear steering assembly comprises a first bevel gear (10) and a second bevel gear (11), and the first bevel gear (10) and the second bevel gear (11) are meshed, and the first bevel gear (10) is mounted on the output shaft of the second motor (9), and the second bevel gear (11) is mounted on the mounting cylinder (19).

4. A melting hole device for producing a compression-resistant MPP power pipe according to claim 1, characterized in that: The end of the ball screw (14) away from the equipment box (2) is fixedly connected to the limit plate (13).

5. The melting hole device for producing a compression-resistant MPP power pipe according to claim 1 is characterized in that: The clamping assembly comprises a rotating fixed seat (21), and the rotating fixed seat (21) is fixedly connected to the output end of the first motor (8), and a limit guide seat (22) is fixedly connected to the rotating fixed seat (21), and a pushing cylinder (25) is installed in the rotating fixed seat (21), and an arc-shaped guide groove (30) and an extension hole (31) are provided on the limit guide seat (22), and the arc-shaped guide groove (30) and the extension hole (31) are connected, and the piston end of the pushing cylinder (25) passes through the extension hole (31) and is fixedly connected to a pushing column (26), and two locking frames (28) are symmetrically connected to the inner side wall of the arc-shaped guide groove (30), and one end of the locking frame (28) is located in the pushing column (26), and the lower end of the connecting rod (23) is fixedly connected to a locking cover (20), and the locking frame (28) is clamped in the locking cover (20).

6. A melting hole device for producing a compression-resistant MPP power pipe according to claim 5, characterized in that: A limiting through hole (27) is provided in the pushing column (26); the locking frame (28) comprises a triangular plate (2801); the triangular plate (2801) is rotatably connected in the arc-shaped guide groove (30); one end of the triangular plate (2801) is fixedly connected to a driving column (2802), and each driving column (2802) is located in the limiting through hole (27); the other end of the triangular plate (2801) is fixedly connected to a locking column (2803), and the locking column (2803) is clamped in the locking cover (20).

7. A melting hole device for producing a compression-resistant MPP power pipe according to claim 6, characterized in that: The locking cover (20) is provided with a locking circular cavity (29) and a circular notch, and the inner diameter of the circular notch is smaller than the inner diameter of the locking circular cavity (29).

8. The melting hole device for producing a compression-resistant MPP power pipe according to claim 1 is characterized by: The machine tool (1) is provided with a movable limit groove (4), a protective frame (6) is installed on the machine tool (1), a working through groove (7) is provided on the protective frame (6), an electric slide rail is installed inside the machine tool (1), an electric heating head (5) is slidably connected to the electric slide rail, and the electric heating head (5) passes through the movable limit groove (4) and the working through groove (7) in sequence and extends upward.

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