Nuclear power pipeline window sampling method

Abstract

The invention discloses a nuclear power pipeline window sampling method. The method is characterized by comprising the following steps: A, drilling: drilling a saw blade reversing hole in the bottom of a nuclear power pipeline part; b, left-position upward longitudinal cutting, wherein saw blade reversing holes in the upper end and the lower end of the left position are cut through through a saw blade; c, upper transverse cutting, wherein the saw blade is reversed at the saw blade reversing hole in the upper end of the left position, the tooth opening of the saw blade is transversely arranged, and the saw blade reversing holes in the left side and the right side of the upper position are cut through; d, upper transverse resetting: resetting the saw blade from the saw blade reversing hole in the right side of the upper position to the saw blade reversing hole in the left side of the upper position, reversing the saw blade in the saw blade reversing hole in the left side of the upper position, and enabling a tooth opening to face upwards; e, left-position longitudinal downward movement, wherein the saw blade with the upward tooth opening longitudinally moves downwards to reach the saw blade reversing hole in the lower end of the left position through a cutting groove between the saw blade reversing holes in the upper end and the lower end of the left position; f, lower transverse cutting; and G, upward longitudinal cutting is conducted on the right position. The device is convenient and efficient in nuclear power pipeline part sampling, low in cost and worthy of popularization and application.

Description

Technical Field

[0001] The invention relates to a sampling method, in particular to a nuclear power pipeline window sampling method. Background Art

[0002] For components used in nuclear power equipment, the chemical and physical properties of the components must fully comply with the specified requirements to ensure safety in use. Therefore, the chemical and physical properties of the components must be tested. For nuclear power pipeline components that are several meters in diameter and several meters high, and weigh tens or even hundreds of tons, sampling and testing is a major problem. Traditionally, there are two methods: one is to use gas cutting for sampling. However, the walls of nuclear power pipeline components are very thick and difficult to cut through. After gas cutting, it will cause a huge waste of materials and costs, and the chemical and physical properties of the components themselves will also be affected. Another method is to use a crane to lower the traditional cutting equipment to cut nuclear power pipeline components. However, for nuclear power pipeline components that are several meters in diameter and several meters high and weigh tens or even hundreds of tons, it is almost impossible to use traditional sawing equipment hung several meters in the air to saw the nuclear power pipeline components. It will cause strong vibrations, which is very unfavorable for cutting and sampling nuclear power pipeline components. Safety is also a big problem. Therefore, the traditional use of traditional sawing equipment to cut and sample nuclear power pipeline components is not only costly and complicated to operate, but also very dangerous. Summary of the Invention

[0003] The present invention aims to solve the shortcomings of the above-mentioned prior art and provide a nuclear power pipeline window sampling method and a special sampling sawing machine that can conveniently, efficiently and safely sample nuclear power plant window pipelines for detection, meeting the needs of nuclear power plants for convenient, efficient and safe sampling of nuclear power pipeline windows.

[0004] The present invention solves the technical problem by adopting a technical solution: This nuclear power pipeline window sampling method includes the following features:

[0005] A: Drilling: Drill four saw blade reversing holes arranged in a square pattern on the bottom of the nuclear power pipeline component;

[0006] B: Left position upward longitudinal cutting: Use the saw blade to cut through the saw blade reversing holes at the upper and lower ends of the left position;

[0007] C: Upper horizontal cutting: The saw blade is reversed at the saw blade reversing hole at the upper end of the left position and the saw blade teeth are placed horizontally, and the saw blade reversing holes on the left and right sides of the upper position are cut through;

[0008] D: Upper horizontal reset: the saw blade is reset from the saw blade reversing hole on the right side of the upper position to the saw blade reversing hole on the left side of the upper position, and the saw blade is reversed at the saw blade reversing hole on the left side of the upper position with the teeth facing upwards;

[0009] E: Left position longitudinal downward movement: the saw blade with the teeth facing upward moves longitudinally downward through the slot between the saw blade reversing holes at the upper and lower ends of the left position to reach the saw blade reversing hole at the lower end of the left position;

[0010] F: Lower horizontal cutting: At the saw blade reversing hole at the lower end of the left position, the saw blade is reversed and the teeth are placed horizontally, and the saw blade reversing holes on the left and right sides of the lower position are cut through;

[0011] G: Upward longitudinal cutting of the right position: Reverse the saw blade at the saw blade reversing hole at the lower end of the right position and make the teeth face upward, cut through the saw blade reversing holes at the upper and lower ends of the right position and complete the cutting and sampling of nuclear power pipeline components.

[0012] This special sawing machine for sampling nuclear power pipeline windows includes a base, a support frame is rotatably connected to the base, a vertical support frame is fixed on the support frame, a sawing frame is provided on the vertical support frame and is slidably connected along the "Z" direction, a driving pulley and a driven pulley are installed on the sawing frame, a saw blade is installed between the driving pulley and the driven pulley, the driving pulley is driven by a first motor fixed on the sawing frame, a first driving mechanism for driving the sawing frame to move up and down is installed on the vertical support frame, a second driving mechanism for driving the support frame to rotate is installed on the base, a notch is opened on the sawing frame, and a bending and reversing mechanism for driving the saw blade to bend and reverse is provided at the notch. The function of the first driving mechanism here is to drive the sawing frame to move up and down along the "Z" direction on the vertical support frame, thereby driving the saw blade to move up and down along the "Z" direction and cut the nuclear power pipeline components; the function of the second driving mechanism here is to drive the support frame to rotate precisely, thereby driving the saw blade to cut the nuclear power pipeline components horizontally; the function of the bending and reversing mechanism here is to drive the saw blade to bend 90°, thereby driving the saw blade to cut the nuclear power pipeline components horizontally.

[0013] Further improved, the first drive mechanism includes a first lead screw nut fixed to the saw frame, a first servo motor fixed to the vertical support frame, a first lead screw driven by the first servo motor threadedly engaged on the first lead screw nut, and a telescopic protective cover fixed to the saw frame to cover the first lead screw. The first lead screw, first lead screw nut, and first servo motor function to accurately drive the saw frame up and down in the "Z" direction; the telescopic protective cover functions as a protective cover to prevent injuries to bystanders who reach into the first lead screw nut and first lead screw.

[0014] To be further improved, the second driving mechanism includes a first turntable rotatably connected to the base, a second servo motor is fixed on the first turntable, a second turntable is rotatably connected to the bottom surface of the sawing frame, a second lead screw nut is fixed on the second turntable, and the second lead screw nut is threadedly fitted with a second lead screw driven by the second servo motor. The second servo motor is fixed to the first rotating frame, and when the second lead screw is deflected, the first rotating frame connected to the base will also be driven to deflect at an angle synchronously, so that the second lead screw will not be stuck due to the deflection angle driven by the second lead screw nut (such as Figure 7 As shown), the support frame can be driven to rotate to the specified position according to one's own requirements and the nuclear power pipeline components can be cut horizontally using the saw blade.

[0015] Further improvement, the bending and reversing mechanism includes a pair of fixed columns arranged opposite to each other and fixed on the sawing frame, the two fixed columns are respectively located on both sides of the notch, and longitudinal plug holes and transverse plug holes are provided on the two fixed columns. Guide blocks are provided on the guide blocks, and a first guide groove is provided on the guide blocks. A pair of first rolling pressure wheels are arranged opposite to each other on the side of the first guide groove, and the two first rolling pressure wheels are located on both sides of the first guide groove. A column is fixed to the bottom of the guide block, and the saw blade passes through the guide groove and is pressed by the outer rings of the two first rolling pressure wheels. The function of the bending and reversing mechanism here is to drive the saw blade to rotate and bend 90°, so as to facilitate the horizontal cutting of nuclear power pipeline components; the working principle of the bending and reversing mechanism here is: when the saw blade clamped on the two first rolling pressure wheels needs to be rotated 90°, it is only necessary to change the plug post on the guide block from being inserted in the longitudinal socket to being inserted in the transverse socket, so that the saw blade pressed at the two first rolling pressure wheels can be bent 90° and the saw blade teeth in the area between the two fixed posts can be changed from longitudinal to transverse, so that the bottom of the nuclear power pipeline component can be cut and sampled.

[0016] For further improvement, the bending and reversing mechanism includes a rotating block rotatably connected to the two end surfaces of the notch, a base block is fixed on the rotating block, a second guide groove is opened on the base block, and a pair of oppositely arranged second rolling pressure wheels are provided on the side of the second guide groove. The two second rolling pressure wheels are located on both sides of the second guide groove, and the saw blade passes through the second guide groove and is pressed by the outer rings of the two second rolling pressure wheels. An electric cylinder is provided on the sawing frame, and the bottom end of the electric cylinder is rotatably connected to the sawing frame, and the piston rod of the electric cylinder is rotatably connected to the rotating block. The function of the bending and reversing mechanism here is to drive the saw blade to bend 90°, so as to facilitate the horizontal cutting of nuclear power pipeline components; the working principle of the bending and reversing mechanism here is: when the saw blade clamped on the two second rolling pressure wheels needs to be bent 90°, it is only necessary to start the electric cylinder, and the piston rod on the electric cylinder drives the turn block to rotate, thereby driving the turn block to rotate 90°, and then using the two second rolling pressure wheels, it is easy to drive the saw blade to bend 90° and change the saw blade teeth in the area between the two turn blocks from longitudinal to transverse, so that the bottom of the nuclear power pipeline components can be cut and sampled; the electric cylinder here is an existing product on the market, and its working principle is: the electric cylinder is a modular product that integrates a servo motor and a lead screw, which converts the rotational motion of the servo motor into linear motion. Products from companies such as Wuxi Maitz Industrial Automation Co., Ltd. and Beijing Botian Shunda Electromechanical Technology Co., Ltd. can be selected.

[0017] To further improve the structure, a set of roller brackets are fixed to the bottom end of the support frame, and each roller bracket is equipped with a roller supported on the top surface of the base. The roller brackets and rollers here serve to support the support frame, thereby making it more stable when the support frame rotates, and the support frame has better resistance to bending forces, thereby providing stronger longitudinal support capabilities for the vertical support frame and sawing frame.

[0018] For further improvement, a skateboard body is slidably connected to the sawing frame, the rotating shaft of the driven pulley is fixed on the skateboard body, a slot and a channel hole connected to the slot are opened on the skateboard body, a pressure bearing is fixed in the slot, a rolling bearing is fixed in the channel hole, a screw nut is fixed on the skateboard body, a screw nut is threadedly matched with a screw, a pressure block pressed on the outer ring of the pressure bearing is fixed to the outer end of the screw, an insert rod matched with the inner ring of the rolling bearing is fixed to the outer end of the pressure block, a tightening nut is matched on the screw, and a twisting rod is fixed to the outer end of the screw. The role of the slide body, channel hole, pressure bearing, rolling bearing, lead screw nut, lead screw, pressure block and plug rod is to facilitate the installation and tensioning of the saw blade. After long-term use, the saw blade will be stretched and loosened. The loose saw blade is prone to breakage and slipping during cutting, so it is necessary to tighten the loose saw blade so that the bottom of the nuclear power pipeline component can be sawed and sampled safely, thereby increasing the service life of the saw blade and reducing costs. The working principle of the saw blade tensioning here is: drive clockwise The screw rod rotates, thereby driving the lead screw to rotate and move. The movement of the lead screw will synchronously drive the pressure block to rotate and move. Since the pressure block is pressed on the pressure bearing, the pressure block rotates and displaces at the same time, thereby pressing the skateboard body to move together. Since the rotating shaft on the driven pulley is installed on the skateboard body, it will also drive the driven pulley to move, and then tighten the loosened saw blade. After the saw blade is tensioned, the clamping nut can be tightened to tighten the lead screw to prevent the lead screw from loosening and rotating, causing the skateboard body to move back, and causing the saw blade to loosen again.

[0019] For further improvement, an angle scale is installed between the support frame and the base. The magnetic ring of the angle scale is fixed to the base, and the magnetic head of the angle scale is fixed to the support frame. The function of this angle scale is to obtain a signal indicating the rotation angle of the support frame when it rotates, thereby accurately controlling the rotation angle of the support frame and simultaneously achieving precise control of the saw blade's cutting and sampling of nuclear power pipeline components. This angle scale is a commercially available product, and products from companies such as Shenzhen Gejie Technology Co., Ltd. and Suzhou Bilixin Optoelectronics Co., Ltd. can be selected.

[0020] For further improvement, an angle scale is fixed on the top surface of the base. The role of the angle scale is to help workers see the angle of the support frame rotation and record it, so as to avoid angle errors caused by damage or failure of the angle magnetic scale and cause erroneous results. The angle scale plays a role in correction and inspection.

[0021] As a further improvement, the saw frame is equipped with a PLC controller and power switch. The PLC controller is connected to the power switch, the first motor, the first servo motor, the second servo motor, and the angle magnetic scale circuit. The PLC controller enables the coordinated operation of various components, thereby improving the automation and efficiency of cutting nuclear power pipeline components and making operations easier for workers. The PLC controller is a commonly used programmable logic controller (PLC), available from brands such as Mitsubishi, Schneider, Unitronics, Delta, and Panasonic.

[0022] As a further improvement, the saw frame is equipped with a PLC controller and power switch. The PLC controller is connected to the power switch, the first motor, the first servo motor, the second servo motor, the electric cylinder, and the angle magnetic scale. The PLC controller enables the coordinated operation of various components, thereby improving the automation and efficiency of cutting nuclear power pipeline components and making operations easier for workers. The PLC controller is a commonly used programmable logic controller (PLC), available from brands such as Mitsubishi, Schneider, Unitronics, Delta, and Panasonic.

[0023] The beneficial effects of the present invention are as follows: the structural design of the present invention is ingenious and reasonable, and the first driving mechanism can be used to drive the sawing frame to move up and down in the "Z" direction on the vertical support frame, thereby driving the saw blade to move up and down in the "Z" direction and cut the nuclear power pipeline components, and the second driving mechanism can drive the support frame to rotate accurately, thereby driving the saw blade to cut the nuclear power pipeline components horizontally, and the bending reversing mechanism can drive the saw blade to bend 90°, thereby driving the saw blade to cut the nuclear power pipeline components horizontally, and the roller bracket and the roller can support the support frame, so that when the support frame rotates, it will be more stable, and the support frame will have better resistance to bending direction force, thereby having a stronger longitudinal support capacity for the vertical support frame and the sawing frame, and the structural design of the present invention is ingenious and reasonable, and provides a method for sampling pipe components used in nuclear power, and the sampling is convenient, efficient, and low-cost, and is worthy of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a three-dimensional Figure 1 ;

[0025] Figure 2 The present invention is a three-dimensional Figure 2 ;

[0026] Figure 3 for Figure 1 A local enlarged view of area A;

[0027] Figure 4 for Figure 2 BB cross-section diagram;

[0028] Figure 5 The three-dimensional diagram of the first driving mechanism area of the present invention when the telescopic protective cover is removed Figure 3 ;

[0029] Figure 6 The third embodiment of the second embodiment of the bending reversing mechanism of the present invention is shown in FIG. Figure 4 ;

[0030] Figure 7 This is a flow chart of the working principle of the second driving mechanism in the present invention;

[0031] Figure 8 This is a working principle diagram of the present invention.

[0032] Description of the accompanying drawings: base 1, support frame 2, vertical support frame 3, sawing frame 4, active pulley 5, driven pulley 6, saw blade 7, first motor 8, first driving mechanism 9, first screw nut 9-1, first servo motor 9-2, first screw 9-3, telescopic protective cover 9-4, second driving mechanism 10, first rotating frame 10-1, second servo motor 10-2, second rotating frame 10-3, second screw nut 10-4, second screw 10-5, bending reversing mechanism 11, fixing column 11-1, longitudinal jack 11-1a, transverse jack 11-1b, guide block 11-2, first guide groove 11-2a, first A rolling pressure wheel 11-2b, a plug column 11-3, a rotating block 11-4, a base block 11-5, a second guide groove 11-5a, a second rolling pressure wheel 11-5b, an electric cylinder 11-6, a roller bracket 12, a roller 12-1, a slide body 13, a slot 13-1, a channel hole 13-2, a pressure bearing 14, a rolling bearing 15, a screw nut 16, a screw 17, a pressure block 17-1, a twisting rod 17-2, a plug rod 18, a tightening nut 19, an angle magnetic ruler 20, an angle scale 21, a PLC controller 22, a power switch 23, a nuclear power pipeline component 24, a sampling and cutting area 24-1, and a saw blade reversing hole 24-2. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Example 1:

[0035] Refer to the attached Figure 1 、 2 , 3, 4, 5, 7, 8: This nuclear power pipeline window sampling method includes the following characteristics:

[0036] A: Drilling: Drill four saw blade reversing holes 24-2 arranged in a square at the bottom of the nuclear power pipeline component 24;

[0037] B: Left position upward longitudinal cutting: Use the saw blade 7 to cut through the saw blade reversing holes 24-2 at the upper and lower ends of the left position;

[0038] C: Upper horizontal cutting: The saw blade 7 is reversed at the saw blade reversing hole 24-2 at the upper end of the left position and the saw blade teeth are placed horizontally, and the saw blade reversing holes 24-2 on the left and right sides of the upper position are cut through;

[0039] D: Upper horizontal reset: The saw blade 7 is reset from the saw blade reversing hole 24-2 on the right side of the upper position to the saw blade reversing hole 24-2 on the left side of the upper position, and the saw blade 7 is reversed at the saw blade reversing hole 24-2 on the left side of the upper position with the tooth opening facing upward;

[0040] E: Left position longitudinal downward movement: the saw blade 7 with the teeth facing upward moves longitudinally downward through the slot between the saw blade reversing holes 24-2 at the upper and lower ends of the left position to reach the saw blade reversing hole 24-2 at the lower end of the left position;

[0041] F: Lower horizontal cutting: At the saw blade reversing hole 24-2 at the lower end of the left position, the saw blade 7 is reversed and the teeth are placed horizontally, and the saw blade reversing holes 24-2 on the left and right sides of the lower position are cut through;

[0042] G: Upward longitudinal cutting of the right position: Reverse the saw blade 7 at the saw blade reversing hole 24-2 at the lower end of the right position and make the teeth face upward, cut through the saw blade reversing holes 24-2 at the upper and lower ends of the right position and complete the cutting and sampling of the nuclear power pipeline components.

[0043] This special sawing machine for sampling nuclear power pipeline windows includes a base 1, a support frame 2 is rotatably connected to the base 1, a vertical support frame 3 is fixed to the support frame 2, a sawing frame 4 is provided on the vertical support frame 3 and is slidably connected along the "Z" direction, a driving pulley 5 and a driven pulley 6 are installed on the sawing frame 4, a saw blade 7 is installed between the driving pulley 5 and the driven pulley 6, the driving pulley 5 is driven by a first motor 8 fixed on the sawing frame 4, a first driving mechanism 9 for driving the sawing frame 4 to move up and down is installed on the vertical support frame 3, a second driving mechanism 10 for driving the support frame 2 to rotate is installed on the base 1, a notch 4-1 is opened on the sawing frame 4, and a bending and reversing mechanism 11 for driving the saw blade 7 to bend and reverse is provided at the notch 4-1.

[0044] The first driving mechanism 9 includes a first lead screw nut 9-1 fixed on the sawing frame 4, a first servo motor 9-2 is fixed on the vertical support frame 3, the first lead screw nut 9-1 is threadedly engaged with a first lead screw 9-3 driven by the first servo motor 9-2, and a telescopic protective cover 9-4 covering the first lead screw 9-3 is fixed on the sawing frame 4.

[0045] The second driving mechanism 10 includes a first rotating frame 10-1 rotatably connected to the base 1, a second servo motor 10-2 is fixed to the first rotating frame 10-1, a second rotating frame 10-3 is rotatably connected to the bottom surface of the sawing frame 4, a second lead screw nut 10-4 is fixed to the second rotating frame 10-3, and the second lead screw nut 10-4 is threadedly engaged with a second lead screw 10-5 driven by the second servo motor 10-2.

[0046] An angle magnetic scale 20 is provided between the support frame 2 and the base 1. The magnetic ring of the magnetic scale 20 is fixed on the base 1, and the magnetic head of the angle magnetic scale 20 is fixed on the support frame 2; an angle scale 21 is fixed on the top surface of the base 1.

[0047] The bending and reversing mechanism 11 includes a pair of fixed columns 11-1 arranged opposite to each other and fixed on the sawing frame 4, and the two fixed columns 11-1 are respectively located on both sides of the notch 4-1. A longitudinal insertion hole 11-1a and a transverse insertion hole 11-1b are provided on the two fixed columns 11-1. A guide block 11-2 is provided on the two fixed columns 11-1. A first guide groove 11-2a is provided on the guide block 11-2. A pair of first rolling pressure wheels 11-2b are arranged opposite to each other on the side of the first guide groove 11-2a. The two first rolling pressure wheels 11-2b are located on both sides of the first guide groove 11-2a. A column 11-3 is fixed to the bottom of the guide block 11-2. The saw blade 7 passes through the guide groove 11-2a and is pressed by the outer rings of the two first rolling pressure wheels 11-2b.

[0048] A group of roller brackets 12 are fixed to the bottom end of the support frame 2 , and each roller bracket 12 is mounted with a roller 12 - 1 supported on the top surface of the base 1 .

[0049] A slide plate 13 is slidably connected to the sawing frame 4, and the rotating shaft of the driven pulley 6 is fixed on the slide plate 13. A slot 13-1 and a channel hole 13-2 connected to the slot 13-1 are provided on the slide plate 13. A pressure bearing 14 is fixed in the slot 13-1, and a rolling bearing 15 is fixed in the channel hole 13-2. A screw nut 16 is fixed to the slide plate 13, and a screw nut 16 is threadedly fitted with a screw 17. The outer end of the screw 17 is fixed with a pressure block 17-1 pressed on the outer ring of the pressure bearing 14, and the outer end of the pressure block 17-1 is fixed with an insert rod 18 fitted at the inner ring of the rolling bearing 15. A tightening nut 19 is fitted on the screw 17, and a twisting rod 17-2 is fixed to the outer end of the screw 17.

[0050] A PLC controller 22 and a power switch 23 are installed on the sawing frame 4. The PLC controller 22 is connected to the power switch 23, the first motor 8, the first servo motor 9-2, the second servo motor 10-2 and the angle magnetic ruler 20.

[0051] The working principle of the first embodiment of the present invention is as follows: first, the special sawing machine of this scheme is fixed in the middle position below the nuclear power pipeline component. Then, four saw blade reversing holes 24-2 arranged in a square are drilled on the nuclear power pipeline component 22. Then, the power switch 23 is pressed to start the PLC controller 20. The PLC controller 20 controls the first motor 8 to rotate at high speed and drives the saw blade 7 to rotate at high speed. Then, the PLC controller 20 controls the first servo motor 9-2 on the first drive mechanism 9, so that the first servo motor 9-2 drives the first screw 9-3 to rotate. The rotation of the first screw 9-3 drives the first screw nut 9-1 to move, thereby driving the sawing frame 4 to move longitudinally at the vertical support frame 3, thereby cutting the nuclear power pipeline component 22 in the longitudinal direction. Thereby, the longitudinal line on the left side is cut out, and the longitudinal line on the left side cuts through the two saw blade reversing holes 24-2 on the left side. Subsequently, the PLC controller 20 controls the first motor 8 to stop running, and then the two guide blocks 11-2 are synchronously pulled out longitudinally, so that the two plug posts 11-3 plugged in the longitudinal holes 11-1a are disengaged from the longitudinal holes 11-1a and the two guide blocks 11-2 are rotated 90° at the same time, and then the plug posts 11-3 are plugged in the transverse holes 11-1b again, and then the saw blade 7 pressed on the two first rolling pressure wheels 11-2b will be forced to bend 90°, so that the saw blade 7 located between the two fixed posts 11-1 will be bent and driven to bend 90°, thereby the teeth of the saw blade 7 are reshaped at the saw blade reversing hole 24-2 at the top left side. The saw blade 7 is rotated horizontally, and then the first motor 8 is started again to drive the saw blade 7 to rotate at high speed. Then, the PLC controller 20 starts the second servo motor 10-2 to rotate, thereby driving the second lead screw 10-5 to rotate. The rotation of the second lead screw 10-5 will drive the second lead screw nut 10-4 to move. The movement of the second lead screw nut 10-4 will synchronously drive the vertical support frame 3 to rotate along the direction of the rotation axis of the support frame body 2. The vertical support frame 3 is driven to rotate and will synchronously drive the saw blade 7 located on the sawing frame body 4 to move horizontally, so that the saw blade 7 cuts through the two saw blade reversing holes 24-2 above. Immediately afterwards, the PLC controller 20 controls the second servo motor 10-2 to rotate in the opposite direction and resets the saw blade 7 to the saw blade reversing hole 24-2 at the top left. Then, the two guide blocks 11-2 The pins 11-3 on the two guide blocks 11-2 are respectively inserted back into the two longitudinal sockets 11-1a, so that the teeth of the saw blade 7 are facing upward again. Then, the PLC controller 20 controls the first servo motor 9-2 to rotate in the opposite direction again, thereby driving the sawing frame 3 to move downward, and then the saw blade 7 also moves downward, and moves the saw blade 7 down to the saw blade reversing hole 24-2 at the bottom left end. Then, the two pins 11-3 on the two guide blocks 11-2 are respectively inserted into the two horizontal sockets 11-1b, thereby bending the saw blade 7 90° again. The PLC controller 20 controls the second servo motor 10-2 again, thereby using the second lead screw 10-5 to rotate again to drive the sawing frame 4 to rotate and synchronously drive the saw blade with the teeth arranged horizontally to cut through the two saw blade reversing holes 24-2 below.At this time, the saw blade 7 is located at the saw blade reversing hole 24-2 at the bottom right side. The tooth direction of the saw blade 7 is adjusted again, and the plug posts 11-3 on the two guide blocks 11-2 are plugged into the longitudinal plug holes 11-1a again, so that the tooth of the saw blade 7 is facing upward again. Finally, the PLC controller 20 controls and starts the first servo motor 9-2 again, thereby driving the sawing frame 4 to move upward again, so that the saw blade 7 cuts through the two saw blade reversing holes 24-2 on the right side, thereby completing the cutting of the sample in the sampling cutting area 24-1 (e.g., Figure 8 As shown in the figure, it is not only convenient and efficient but also low-cost to sample the tube components used in nuclear power, but also worthy of promotion and application.

[0052] Example 2:

[0053] Refer to the attached Figure 6 This nuclear power pipeline window sampling method includes the following features:

[0054] A: Drilling: Drill four saw blade reversing holes 24-2 arranged in a square at the bottom of the nuclear power pipeline component 24;

[0055] B: Left position upward longitudinal cutting: Use the saw blade 7 to cut through the saw blade reversing holes 24-2 at the upper and lower ends of the left position;

[0056] C: Upper horizontal cutting: The saw blade 7 is reversed at the saw blade reversing hole 24-2 at the upper end of the left position and the saw blade teeth are placed horizontally, and the saw blade reversing holes 24-2 on the left and right sides of the upper position are cut through;

[0057] D: Upper horizontal reset: The saw blade 7 is reset from the saw blade reversing hole 24-2 on the right side of the upper position to the saw blade reversing hole 24-2 on the left side of the upper position, and the saw blade 7 is reversed at the saw blade reversing hole 24-2 on the left side of the upper position with the tooth opening facing upward;

[0058] E: Left position longitudinal downward movement: the saw blade 7 with the teeth facing upward moves longitudinally downward through the slot between the saw blade reversing holes 24-2 at the upper and lower ends of the left position to reach the saw blade reversing hole 24-2 at the lower end of the left position;

[0059] F: Lower horizontal cutting: At the saw blade reversing hole 24-2 at the lower end of the left position, the saw blade 7 is reversed and the teeth are placed horizontally, and the saw blade reversing holes 24-2 on the left and right sides of the lower position are cut through;

[0060] G: Upward longitudinal cutting of the right position: Reverse the saw blade 7 at the saw blade reversing hole 24-2 at the lower end of the right position and make the teeth face upward, cut through the saw blade reversing holes 24-2 at the upper and lower ends of the right position and complete the cutting and sampling of the nuclear power pipeline components.

[0061] This special sawing machine for sampling nuclear power pipeline windows includes a base 1, a support frame 2 is rotatably connected to the base 1, a vertical support frame 3 is fixed to the support frame 2, a sawing frame 4 is provided on the vertical support frame 3 and is slidably connected along the "Z" direction, a driving pulley 5 and a driven pulley 6 are installed on the sawing frame 4, a saw blade 7 is installed between the driving pulley 5 and the driven pulley 6, the driving pulley 5 is driven by a first motor 8 fixed on the sawing frame 4, a first driving mechanism 9 for driving the sawing frame 4 to move up and down is installed on the vertical support frame 3, a second driving mechanism 10 for driving the support frame 2 to rotate is installed on the base 1, a notch 4-1 is opened on the sawing frame 4, and a bending and reversing mechanism 11 for driving the saw blade 7 to bend and reverse is provided at the notch 4-1.

[0062] The first driving mechanism 9 includes a first lead screw nut 9-1 fixed on the sawing frame 4, a first servo motor 9-2 is fixed on the vertical support frame 3, the first lead screw nut 9-1 is threadedly engaged with a first lead screw 9-3 driven by the first servo motor 9-2, and a telescopic protective cover 9-4 covering the first lead screw 9-3 is fixed on the sawing frame 4.

[0063] The second driving mechanism 10 includes a first rotating frame 10-1 rotatably connected to the base 1, a second servo motor 10-2 is fixed to the first rotating frame 10-1, a second rotating frame 10-3 is rotatably connected to the bottom surface of the sawing frame 4, a second lead screw nut 10-4 is fixed to the second rotating frame 10-3, and the second lead screw nut 10-4 is threadedly engaged with a second lead screw 10-5 driven by the second servo motor 10-2.

[0064] An angle magnetic scale 20 is provided between the support frame 2 and the base 1. The magnetic ring of the magnetic scale 20 is fixed on the base 1, and the magnetic head of the angle magnetic scale 20 is fixed on the support frame 2; an angle scale 21 is fixed on the top surface of the base 1.

[0065] The bending and reversing mechanism 11 includes a rotating block 11-4 rotatably connected to the two end surfaces of the notch 4-1, a base block 11-5 is fixed on the rotating block 11-4, a second guide groove 11-5a is opened on the base block 11-5, and a pair of oppositely arranged second rolling pressure wheels 11-5b are provided on the side of the second guide groove 11-5a. The two second rolling pressure wheels 11-5b are located on both sides of the second guide groove 11-5a, and the saw blade 7 passes through the second guide groove 11-5a and is pressed by the outer rings of the two second rolling pressure wheels 11-5b. An electric cylinder 11-6 is provided on the sawing frame 4, and the bottom end of the electric cylinder 11-6 is rotatably connected to the sawing frame 4, and the piston rod of the electric cylinder 11-6 is rotatably connected to the rotating block 11-4.

[0066] A group of roller brackets 12 are fixed to the bottom end of the support frame 2 , and each roller bracket 12 is mounted with a roller 12 - 1 supported on the top surface of the base 1 .

[0067] A slide plate 13 is slidably connected to the sawing frame 4, and the rotating shaft of the driven pulley 6 is fixed on the slide plate 13. A slot 13-1 and a channel hole 13-2 connected to the slot 13-1 are provided on the slide plate 13. A pressure bearing 14 is fixed in the slot 13-1, and a rolling bearing 15 is fixed in the channel hole 13-2. A screw nut 16 is fixed to the slide plate 13, and a screw nut 16 is threadedly fitted with a screw 17. The outer end of the screw 17 is fixed with a pressure block 17-1 pressed on the outer ring of the pressure bearing 14, and the outer end of the pressure block 17-1 is fixed with an insert rod 18 fitted at the inner ring of the rolling bearing 15. A tightening nut 19 is fitted on the screw 17, and a twisting rod 17-2 is fixed to the outer end of the screw 17.

[0068] A PLC controller 22 and a power switch 23 are installed on the sawing frame 4. The PLC controller 22 is connected to the power switch 23, the first motor 8, the first servo motor 9-2, the second servo motor 10-2, the electric cylinder 11-6 and the angle magnetic ruler 20.

[0069] The working principle of embodiment 2 of the present invention: The working principle of embodiment 2 is basically the same as that of embodiment 1. The only difference is that the bending and reversing mechanism 11 drives the saw blade 7 to bend 90° in a different way. In embodiment 2, the electric cylinder 11-6 is directly used to rotate the rotating block 11-4, thereby driving the saw blade 7 pressed by the two second rolling pressure wheels 11-5b to bend 90°, so that the saw blade 7 located between the two rotating blocks 11-4 is bent 90°, so that the electric cylinder 11-6 can automatically set the teeth on the saw blade 7 horizontally or upward, so that the nuclear power pipeline component 24 can be cut longitudinally and horizontally, so that the sample in the sampling cutting area 24-1 can be cut conveniently. This method is convenient for sampling, efficient, and low in cost, and is worthy of promotion and application.

[0070] Although the present invention has been illustrated and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made within the scope of the claims. In the description of the invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like, indicating directions or positions, are based on the directions or positions shown in the accompanying drawings and are intended only to facilitate description and simplify the description of the invention. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed or operate in a specific direction, and are not to be construed as limiting the invention. In the present invention, unless otherwise expressly provided or limited, the terms "mounted," "connected," "connected," and "fixed" are to be broadly construed, for example, to mean fixed, detachable, or integrally connected; mechanically or electrically connected; directly or indirectly through an intermediate medium; or internally connected between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A nuclear power pipeline window sampling method: its characteristics include the following features: A : Drilling: Drill four saw blade reversing holes (24-2) arranged in a square at the bottom of the nuclear power pipeline component; B: Left position upward longitudinal cutting: Use the saw blade to cut through the saw blade reversing holes (24-2) at the upper and lower ends of the left position; C: Upper horizontal cutting: the saw blade is reversed at the saw blade reversing hole (24-2) at the upper end of the left position and the saw blade teeth are placed horizontally, and the saw blade reversing holes (24-2) on the left and right sides of the upper position are cut through; D: Upper horizontal reset: the saw blade is reset from the saw blade reversing hole (24-2) on the upper right side to the saw blade reversing hole (24-2) on the upper left side, and the saw blade is reversed at the saw blade reversing hole (24-2) on the upper left side with the tooth opening facing upwards; E: Left position longitudinal downward movement: the saw blade with the teeth facing upward moves longitudinally downward through the cut groove between the saw blade reversing holes (24-2) at the upper and lower ends of the left position to reach the saw blade reversing hole (24-2) at the lower end of the left position; F: Lower horizontal cutting: At the saw blade reversing hole (24-2) at the lower end of the left position, the saw blade is reversed and the tooth opening is placed horizontally, and the saw blade reversing holes (24-2) on the left and right sides of the lower position are cut through; G: Upward longitudinal cutting of the right position: the saw blade is reversed at the saw blade reversing hole (24-2) at the lower end of the right position and the teeth are turned upward, the saw blade reversing holes (24-2) at the upper and lower ends of the right position are cut through and the cutting sampling of the nuclear power pipeline components is completed.

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