Automatic machining equipment for nuclear power stabilizer electric heater maintenance numerical control pipe outer bevel

Abstract

The application discloses a nuclear power stabilizer electric heater maintenance numerical control pipeline outer bevel automatic processing equipment, which comprises a spiral line disc, an upper cutter disc and a feeding frame. The spiral line disc is driven to rotate by a first set of driving devices, and a spiral line groove with a rotary axis as a center is arranged on the upper end of the spiral line disc. The upper cutter disc is driven to rotate by a second set of driving devices, and a guide groove extending along a radial direction is arranged on the upper cutter disc. The upper cutter disc and the spiral line disc share a rotary axis, a guide block is arranged on the lower end of the feeding frame, and a spiral tooth is arranged on the lower end surface of the guide block and matched with the spiral line groove. The spiral line disc and the upper cutter disc are driven by the two sets of driving devices respectively, automatic feeding and automatic withdrawing are completed by using a differential feeding principle and by virtue of the difference between the rotating speeds of the spiral line disc and the upper cutter disc. The rotating speed is controlled, accurate cutting of a given depth and accurate control of feeding and withdrawing speed are realized, and automatic operation of pipeline outer bevel processing with high precision requirements in special environments can be completed.

Description

Technical Field

[0001] This invention belongs to the field of data processing, specifically relating to an automatic machining equipment for external beveling of CNC pipelines used in the repair of electric heaters for nuclear power plant pressurizers. Background Technology

[0002] In response to potential malfunctions in the electric heaters of voltage stabilizers in operating power plant units, pipe cutting and beveling are crucial steps in the replacement process. Pipe cutting and beveling technology involves clamping and fixing the pipe at the point to be cut using a fixing device, and then using a cutting and beveling device to complete the pipe cutting and beveling.

[0003] The existing pipe cutting and beveling process mainly consists of pipe clamping and pipe cutting. For existing clamping devices, most simple cutting equipment still uses bolt tightening for fixation, while a small number of automated cutting devices use hydraulic push rods to achieve pipe clamping and fixation. If manually driven, existing pipe clamping devices have slow clamping speeds, low clamping efficiency, cannot be arbitrarily adjusted, and are difficult to control the preload during clamping, easily causing scratches or damage to the pipe surface. If automatically driven, existing clamping devices have poor clamping stability, and most are hydraulically driven structures, resulting in relatively slow clamping speeds.

[0004] Meanwhile, existing cutting equipment has the following limitations: it cannot be used for cutting vertical pipes in small spaces and beveling in nuclear environments, and it cannot simultaneously meet the requirements of automatic feed, automatic retraction, and adjustable feed speed and feed amount, thus failing to meet the needs of automatic operation in special environments. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic machining equipment for the external beveling of CNC pipes used in the maintenance of electric heaters for nuclear power plant pressurizers, in order to solve the technical problems in the prior art that cannot achieve high-precision automatic feed, automatic retraction, feed speed and feed amount adjustment.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] Nuclear power plant pressurizer electric heater repair CNC pipe external beveling automatic processing equipment, including pipe cutting device, which includes:

[0008] The spiral spool is driven to rotate by the first set of drive devices, and its upper end is provided with a spiral groove centered on the axis of rotation.

[0009] The upper part of the cutter head is driven to rotate by a second set of drive devices. It has radially extending guide grooves and a through-hole at its bottom. The upper part of the cutter head shares a common axis of rotation with the helical disc.

[0010] The tool feed holder has a guide block at its lower end that matches the guide groove and moves along it. The lower end surface of the guide block has helical teeth that cooperate with the helical groove to achieve centripetal motion when moving along the helical line.

[0011] Furthermore, the first set of driving devices includes a feed servo motor and a feed gear, the spiral disc is fixed to the upper end of the feed gear, and a first planetary reducer is provided between the feed servo motor and the feed gear; the second set of driving devices includes a cutting rotary servo motor and a cutting rotary gear, the upper part of the cutter disc is fixed on the cutting rotary gear, and a second planetary reducer is provided between the cutting rotary servo motor and the cutting rotary gear.

[0012] Furthermore, two sets of feed posts are symmetrically mounted on the upper part of the cutter head.

[0013] Furthermore, the rotation axes of the feed servo motor and the cutting rotary servo motor are both parallel to the rotation axis of the helical disc.

[0014] Furthermore, it includes an upper pipe clamping device for clamping the upper part of the pipe to be processed and a lower pipe clamping device for clamping the lower part of the pipe to be processed, with a mounting base fixed at the lower end of the lower pipe clamping device.

[0015] Furthermore, the upper pipe clamping device and / or the lower pipe clamping device include multiple jaws and a drive mechanism for driving the multiple jaws to move synchronously in the radial direction.

[0016] Furthermore, the driving mechanism includes a clamping gear, the claws are mounted on the clamping gear, the clamping gear has helical grooves spaced apart and corresponding to the claws one by one, the helical grooves pass through the clamping gear vertically, the outer end of the claws is inserted into the helical grooves through cylindrical pins, and the distance between the helical grooves and the center line of the clamping gear gradually decreases from the starting point to the ending point so as to drive the multiple cylindrical pins to move synchronously in the radial direction when the clamping gear rotates.

[0017] Furthermore, the drive mechanism also includes a pneumatic motor, a drive gear, and a speed-changing gear that are driven in sequence. The clamping gear meshes with the speed-changing gear, and the number of teeth of the speed-changing gear is greater than the number of teeth of the drive gear.

[0018] Furthermore, the upper pipe clamping device includes multiple upper jaws, and the lower pipe clamping device includes multiple lower jaws. The upper jaws include arc-shaped clamping surfaces, and the lower jaws include V-shaped clamping surfaces. The clamping surfaces of the lower jaws are provided with serrated grooves. The clamping surface diameter of the upper jaws is 32.5 mm.

[0019] Furthermore, it includes a monitoring system, which includes an image acquisition device and an information storage device, wherein the image acquisition device is electrically connected to an input port of the information storage device.

[0020] Compared with the prior art, the present invention provides an automatic machining equipment for CNC pipe external beveling in the maintenance of electric heaters for nuclear power plant pressurizers, which has the following beneficial effects:

[0021] 1. The spiral feed disc and the upper part of the cutter head are driven by two separate drive units. Utilizing the principle of differential feed, the different rotational speeds of the spiral feed disc and the upper part of the cutter head, combined with the radial guide movement of the feed post and the helical engagement of the feed post and the spiral feed disc, enable automatic feed and retraction. By controlling the rotational speeds of the two drive units, precise feed and retraction can be achieved, simultaneously completing precise cuts to a given depth. Because of the dual-motor drive, precise control of feed and retraction time and speed is possible, making it suitable for high-precision pipe cutting and beveling under nuclear environment conditions. Remote control of the dual motors also allows for automated operation in special environments.

[0022] 2. The rotation axes of both the feed servo motor and the cutting rotary servo motor are parallel to the rotation axis of the spiral disc, which reduces the overall circumferential size of the equipment and makes it suitable for cutting small-diameter vertical pipes and beveling in confined spaces in nuclear environments.

[0023] 3. The use of upper and lower pipe clamping devices to clamp the pipe simultaneously provides a more secure fixation. The chucks employ a helical feed clamping method, with a pneumatic motor driving the rotation of the clamping gears. This enables remote, centered clamping of the pipe and precise control of the clamping motion. Furthermore, the clamping motion is responsive, the clamping force is stable, and the clamping speed is fast, significantly improving the efficiency of pipe clamping and meeting the requirements for cutting and beveling.

[0024] 4. Two sets of feed posts are symmetrically arranged on the upper part of the cutter head, which improves cutting efficiency and reduces the tangential force generated during the cutting process, and counteracts the shaking effect of the cutting force on the pipeline.

[0025] 5. The monitoring system can monitor the pipeline cutting process in real time, allowing technicians to remotely assess the on-site working environment and status, which is beneficial for the normal, efficient, and safe execution of the cutting work. Simultaneously, the monitoring system can record and archive the cutting footage, facilitating continuous equipment improvement through the collection of historical data.

[0026] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the automatic machining equipment for external beveling of CNC pipes used in the repair of nuclear power plant pressurizer electric heaters according to the present invention.

[0028] Figure 2 yes Figure 1 A top view of the pipe cutting device in the middle;

[0029] Figure 3 yes Figure 2 Sectional view along direction A in the middle;

[0030] Figure 4 yes Figure 1 Top view of the upper middle section of the pipe clamping part;

[0031] Figure 5 yes Figure 4 Sectional view along direction F in the middle;

[0032] Figure 6 yes Figure 1 Cross-sectional view of the lower middle section of the pipe clamping part;

[0033] Figure 7 yes Figure 6 Sectional view along line G;

[0034] Figure 8 yes Figure 2 A three-dimensional structural diagram of the center feed tool post;

[0035] In the diagram: 1. Pipe cutting device; 2. Upper pipe clamping device; 3. Lower pipe clamping device; 4. Image acquisition equipment; 5. Pipe; 6. Mounting base; 7. Cutting feed servo motor; 8. First planetary reducer; 9. Cutting feed drive gear; 10. Cutting feed gear; 11. Helical coil; 2. Feed holder; 3. Crossed roller bearing; 4. Cutting rotary gear; 5. Cutting rotary drive gear; 6. Second planetary reducer. 0011. Cutting rotary servo motor; 0012. Upper part of the cutter head; 0013. Lower pneumatic motor; 011. Lower drive gear; 012. Lower clamping gear; 013. Lower cylindrical pin; 014. Lower jaw slider; 015. Lower jaw; 016. Lower spiral groove; 017. Upper pneumatic motor; 021. Upper drive gear; 022. Upper speed-changing gear; 023. Upper clamping gear; 024. Upper jaw; 025. Upper cylindrical pin; 026. Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art should understand that the embodiments described below are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] An embodiment of the automatic machining equipment for external beveling of CNC pipes for repairing nuclear power plant pressurizer electric heaters according to the present invention:

[0038] For the specific structure of the automatic machining equipment for CNC pipe external beveling for nuclear power plant regulator electric heater repair, please refer to the following: Figure 1-7 It includes a pipe cutting device 1, an upper pipe clamping device 2, a lower pipe clamping device 3, an image acquisition device 4, and a mounting base 6.

[0039] The pipe 5 with the bevel to be cut has its axis pointing downwards. Its upper end is clamped by the upper pipe clamping device 2, and its lower end passes through the pipe cutting device 1 and is clamped by the lower pipe clamping device 3. The lower pipe clamping device 3 is fixed on the mounting base 6.

[0040] The structure of pipe cutting device 1 is as follows Figure 2 and Figure 3 As shown, the device includes a cutter head and a feed post 006. The cutter head includes a spiral disc 005 sharing a common rotation centerline and an upper part 0013. The spiral disc 005 and the upper part 0013 are driven by two sets of drive mechanisms respectively. The feed post 006 is radially guided and movably mounted on the upper part 0013. The first set of drive mechanisms includes a cutting feed servo motor 001, a first planetary reducer 002, a cutting feed drive gear 003, a cutting feed gear 004, and the spiral disc 005. The second set of drive mechanisms includes a cutting rotation servo motor 0012, a second planetary reducer 0011, a cutting rotation drive gear 0010, and a cutting rotation gear 009. The upper part 0013 of the cutter head is fixed to the cutting rotation gear 009 by bolts / screws, and the spiral disc 005 is fixed to the cutting feed gear 004 by bolts / screws.

[0041] The cutting feed servo motor 001 is speed-changed by the first planetary reducer 002, which drives the cutting feed drive gear 003 to rotate. The cutting feed drive gear 003 drives the cutting feed gear 004 to rotate, and the spiral disc 005 rotates together with it.

[0042] The cutting rotary servo motor 0012 drives the cutting rotary drive gear 0010 to rotate via the second planetary reducer 0011, which in turn drives the cutting rotary gear 009 to rotate. The cutting rotary gear 009 is mounted on the cutting base via a cross roller gear and can rotate on it. The cutting feed gear 004 is mounted on the cutting rotary gear 009 via a cross roller bearing 007 and can rotate around its axis without affecting each other.

[0043] Two sets of radially extending dovetail-shaped guide grooves are symmetrically opened on the upper part 0013 of the cutter head, and a spiral groove centered on its rotation center line is provided on the upper end of the spiral disc 005. A clearance hole is opened through the bottom of the upper part 0013 of the cutter head.

[0044] The tool feed post 006 includes a guide block at its lower end. The shape of the guide block matches the guide groove. The tool feed post 006 is movably mounted in the guide groove by the guide block. The bottom of the tool feed post 006 has helical teeth. The helical teeth cooperate with the helical coil 005 through clearance holes and complete the centripetal motion by rotation.

[0045] The rotational speed of the cutting feed servo motor 001 is adjusted to regulate the rotational speed of the helical coil 005, and the rotational speed of the cutting rotary servo motor 0012 is adjusted to regulate the rotational speed of the upper part of the cutter head 0013. When the rotational speeds of the helical coil 005 and the upper part of the cutter head 0013 are the same, they are relatively stationary, allowing the cutter head to idle. When the speed of the helical coil 005 is greater than the speed of the upper part of the cutter head 0013, the helical coil 005 rotates clockwise relative to the upper part of the cutter head 0013, achieving rotary feed. When the speed of the helical coil 005 is less than the speed of the upper part of the cutter head 0013, the helical coil 005 rotates counterclockwise relative to the upper part of the cutter head 0013, achieving rotary retraction. Because the rotational speed of the servo motors can be precisely controlled, this invention can achieve precise control of automatic feed, automatic retraction, feed / retraction time, feed / retraction rate, and feed rate.

[0046] The structure of the upper pipe clamping device 2 is as follows: Figure 4 and Figure 5As shown, the device includes an upper pneumatic motor 021, an upper drive gear 022, an upper speed-changing gear 023, an upper clamping gear 024, an upper jaw 025, and an upper cylindrical pin 026. The upper pneumatic motor 021 drives the upper drive gear 022 to rotate, which in turn drives the upper speed-changing gear 023, which in turn drives the upper clamping gear 024 to rotate. The speed reduction effect of the upper speed-changing gear 023 allows for a greater clamping force from the upper clamping gear 024, facilitating pipe clamping. The upper cylindrical pin 026 is fixedly connected to the upper jaw slider, and the upper jaw slider has an upper jaw 025 at its end. The upper clamping gear 024 has a helical groove, into which the upper cylindrical pin 026 is inserted. From the starting point to the ending point, the distance between the upper helical groove and the center line of the clamping gear gradually decreases. Therefore, during rotation, the upper clamping gear 024 compresses the upper cylindrical pin 026, causing it to slide along the upper helical groove. Simultaneously, the upper cylindrical pin 026 generates radial displacement, which in turn drives the upper jaw slider and the upper jaw 025 to move centripetally, completing the upper clamping of the pipe 5. The upper speed-changing gear 023 reduces the transmitted speed, resulting in greater torque and increasing the clamping force of the upper jaw 025.

[0047] The structure of the lower pipe clamping device 3 is as follows: Figure 6 and Figure 7 As shown, it includes a lower pneumatic motor 011, a lower drive gear 012, a lower clamping gear 013, a lower cylindrical pin 014, a lower jaw slider 015, and a lower jaw. The lower pipe clamping device and the upper pipe clamping device work on the same principle, both using a spiral feed and extrusion principle to complete the centripetal movement of the lower jaw and clamp the lower part of the pipe 5.

[0048] It should be noted that the pipe 5 extends further upward beyond the upper pipe clamping device 2, making it more prone to tilting and thus requiring a greater clamping force. The clamping force applied to the pipe 5 by the lower pipe clamping device 8 is less than that applied to the pipe 5 by the upper pipe clamping device 5.

[0049] This embodiment is applicable to pipe cutting and beveling of small diameter pipes. The maximum diameter of the pipe 5 to be processed is 32.5 mm, the maximum wall thickness is 4.75 mm, and the cutting accuracy is ±0.05 mm. Therefore, in this embodiment, the upper chuck formed by the three upper jaws 025 has a travel diameter of 41 mm and a minimum clamping diameter of 31 mm. The clamping surface of the upper jaws 025 is designed as an arc with a diameter of 32.5 mm, which allows for close contact with the workpiece and avoids indentations caused by localized contact. The lower chuck formed by the lower jaws 016 has a travel diameter of 39.5 mm and a minimum clamping diameter of 21 mm. The clamping surface of the lower jaws 016 is designed as a V-shape with added serrated grooves to increase surface friction.

[0050] The clamping surface of the upper jaw 025 is an arc with a diameter of 32.5mm, which can fit tightly with the workpiece and avoid local contact that may cause indentations.

[0051] In this embodiment, a monitoring system is also included. The monitoring system includes an image acquisition device 4 and an information storage device. The image acquisition device 4 is electrically connected to an input port of the information storage device for real-time monitoring and data collection, accumulating work experience for subsequent work and facilitating continuous improvement of the invention.

[0052] The working principle and usage process of this invention are as follows: During use, the pipe passes sequentially from top to bottom through the upper pipe clamping device 2, the pipe cutting device 1, and the lower pipe clamping device 3, and then through the mounting base 6. The mounting base 6 is fixed to the base of the area to be constructed (other robot platforms will automatically dock with the bottom of the mounting base 6). The upper pneumatic motor 011 and the lower pneumatic motor 021 are driven to clamp the upper end of the pipe 5 with the upper jaw 025 and the lower jaw 016 with the lower end of the pipe 5. Then, according to actual needs, the cutting feed servo motor 001 and the cutting rotation servo motor 0012 are driven to operate at the set speed to achieve cutting and beveling. During operation, the image acquisition device 4 can monitor the pipe cutting scene in real time. Operators can remotely control and compare the monitoring images to complete the pipe cutting and beveling work. The information acquired by the image acquisition device 4 can be transmitted to the information storage device via a transmission cable. The information storage device stores the acquired image information to accumulate work experience for subsequent work, facilitating continuous improvement of the equipment.

[0053] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A numerical control pipe outer bevel automatic processing equipment for nuclear power stabilizer electric heater maintenance, comprising a pipe cutting device, characterized in that, The pipeline cutting device comprises: a helical line disc driven to rotate by a first set of driving devices, an upper end of the helical line disc being provided with a helical line groove centered on a rotary axis; a cutter disc upper part driven to rotate by a second set of driving devices, the cutter disc upper part being provided with a guide groove extending in a radial direction and being provided with an avoiding hole at a bottom part, the cutter disc upper part and the helical line disc having a common rotary axis; and a feed frame provided at a lower end with a guide block fitted with the guide groove to move along the guide groove, the guide block being provided at a lower end face with helical teeth, the helical teeth cooperating with the helical line groove to realize centripetal motion when moving along the helical line. The first set of driving devices comprises a feed servo motor and a feed gear, the helical line disc being fixed at an upper end of the feed gear, a first planetary reducer being provided between the feed servo motor and the feed gear, the feed servo motor driving the feed gear to rotate through the first planetary reducer, the feed gear driving the helical line disc to rotate, and the rotation speed of the helical line disc being adjusted by adjusting the rotation speed of the feed servo motor; the second set of driving devices comprises a cutting rotary servo motor and a cutting rotary gear, the cutter disc upper part being fixed on the cutting rotary gear, a second planetary reducer being provided between the cutting rotary servo motor and the cutting rotary gear, the cutting rotary servo motor driving the cutting rotary gear to rotate through the second planetary reducer, the cutting rotary gear driving the cutter disc upper part to rotate, and the rotation speed of the cutter disc upper part being adjusted by adjusting the rotation speed of the cutting rotary servo motor. When the rotation speeds of the helical line disc and the cutter disc upper part are the same, the helical line disc and the cutter disc upper part are relatively static, and the cutter disc is idling; when the rotation speed of the helical line disc is greater than that of the cutter disc upper part, the helical line disc rotates positively relative to the cutter disc upper part, and the cutter disc is fed in rotation; and when the rotation speed of the helical line disc is less than that of the cutter disc upper part, the helical line disc rotates reversely relative to the cutter disc upper part, and the cutter disc is fed out in rotation.

2. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic processing equipment according to claim 1, characterized in that: Two groups of the feed frames are symmetrically installed on the cutter disc upper part.

3. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic processing equipment according to claim 2, characterized in that: The rotary axes of the feed servo motor and the cutting rotary servo motor are parallel to the rotary axis of the helical line disc.

4. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic machining equipment according to any one of claims 1-3, characterized in that: The pipeline cutting device comprises:

5. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic processing equipment according to claim 4, characterized in that: a helical line disc driven to rotate by a first set of driving devices, an upper end of the helical line disc being provided with a helical line groove centered on a rotary axis; 6. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic processing equipment according to claim 5, characterized in that: a cutter disc upper part driven to rotate by a second set of driving devices, the cutter disc upper part being provided with a guide groove extending in a radial direction and being provided with an avoiding hole at a bottom part, the cutter disc upper part and the helical line disc having a common rotary axis; and 7. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic processing equipment according to claim 6, characterized in that: a feed frame provided at a lower end with a guide block fitted with the guide groove to move along the guide groove, the guide block being provided at a lower end face with helical teeth, the helical teeth cooperating with the helical line groove to realize centripetal motion when moving along the helical line. The first set of driving devices comprises a feed servo motor and a feed gear, the helical line disc being fixed at an upper end of the feed gear, a first planetary reducer being provided between the feed servo motor and the feed gear, the feed servo motor driving the feed gear to rotate through the first planetary reducer, the feed gear driving the helical line disc to rotate, and the rotation speed of the helical line disc being adjusted by adjusting the rotation speed of the feed servo motor; the second set of driving devices comprises a cutting rotary servo motor and a cutting rotary gear, the cutter disc upper part being fixed on the cutting rotary gear, a second planetary reducer being provided between the cutting rotary servo motor and the cutting rotary gear, the cutting rotary servo motor driving the cutting rotary gear to rotate through the second planetary reducer, the cutting rotary gear driving the cutter disc upper part to rotate, and the rotation speed of the cutter disc upper part being adjusted by adjusting the rotation speed of the cutting rotary servo motor. When the rotation speeds of the helical line disc and the cutter disc upper part are the same, the helical line disc and the cutter disc upper part are relatively static, and the cutter disc is idling; when the rotation speed of the helical line disc is greater than that of the cutter disc upper part, the helical line disc rotates positively relative to the cutter disc upper part, and the cutter disc is fed in rotation; and when the rotation speed of the helical line disc is less than that of the cutter disc upper part, the helical line disc rotates reversely relative to the cutter disc upper part, and the cutter disc is fed out in rotation. Two groups of the feed frames are symmetrically installed on the cutter disc upper part. The rotary axes of the feed servo motor and the cutting rotary servo motor are parallel to the rotary axis of the helical line disc. The pipeline cutting device comprises: a helical line disc driven to rotate by a first set of driving devices, an upper end of the helical line disc being provided with a helical line groove centered on a rotary axis; a cutter disc upper part driven to rotate by a second set of driving devices, the cutter disc upper part being provided with a guide groove extending in a radial direction and being provided with an avoiding hole at a bottom part, the cutter disc upper part and the helical line disc having a common rotary axis; and a feed frame provided at a lower end with a guide block fitted with the guide groove to move along the guide groove, the guide block being provided at a lower end face with helical teeth, the helical teeth cooperating with the helical line groove to realize centripetal motion when moving along the helical line. The first set of driving devices comprises a feed servo motor and a feed gear, the helical line disc being fixed at an upper end of the feed gear, a first planetary reducer being provided between the feed servo motor and the feed gear, the feed servo motor driving the feed gear to rotate through the first planetary reducer, the feed gear driving the helical line disc to rotate, and the rotation speed of the helical line disc being adjusted by adjusting the rotation speed of the feed servo motor; the second set of driving devices comprises a cutting rotary servo motor and a cutting rotary gear, the cutter disc upper part being fixed on the cutting rotary gear, a second planetary reducer being provided between the cutting rotary servo motor and the cutting rotary gear, the cutting rotary servo motor driving the cutting rotary gear to rotate through the second planetary reducer, the cutting rotary gear driving the cutter disc upper part to rotate, and the rotation speed of the cutter disc upper part being adjusted by adjusting the rotation speed of the cutting rotary servo motor. When the rotation speeds of the helical line disc and the cutter disc upper part are the same, the helical line disc and the cutter disc upper part are relatively static, and the cutter disc is idling; when the rotation speed of the helical line disc is greater than that of the cutter disc upper part, the helical line disc rotates positively relative to the cutter disc upper part, and the cutter disc is fed in rotation; and when the rotation speed of the helical line disc is less than that of the cutter disc upper part, the helical line disc rotates reversely relative to the cutter disc upper part, and the cutter disc is fed out in rotation. Two groups of the feed frames are symmetrically installed on the cutter disc upper part. The rotary axes of the feed servo motor and the cutting rotary servo motor are parallel to the rotary axis of the helical line disc.

8. The nuclear power pressurizer electric heater maintenance numerical control pipe outer bevel automatic processing equipment according to claim 5, characterized in that: The upper pipe clamping device comprises a plurality of upper clamping jaws, the lower pipe clamping device comprises a plurality of lower clamping jaws, the upper clamping jaws comprise arc-shaped clamping surfaces, the lower clamping jaws comprise V-shaped clamping surfaces, and the clamping surfaces of the lower clamping jaws are provided with sawtooth grooves; the clamping surfaces of the upper clamping jaws have a diameter of 32.5 mm.

9. The nuclear power plant pressurizer electric heater repair numerical control pipe outer bevel automatic machining equipment according to any one of claims 1-3, characterized in that: The monitoring system comprises an image acquisition device and an information storage device, and the image acquisition device is electrically connected to an input port of the information storage device.

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