Flexible plug cutting tool for cold source water inlet passage of nuclear power plant

Abstract

The invention relates to the technical field of nuclear power plant equipment maintenance, in particular to a cutting tool for flexible blockages of a cold source water inlet passage of a nuclear power plant. The tool comprises a cutter installation beam, wherein grounding limiting pieces are installed on the two sides of the cutter installation beam; each cutting tool assembly comprises a rotating shaft, a tool mounting seat, a fixing rod, a cutting plate and a tool; a rotating shaft and two fixing rods are arranged between the two cutter mounting seats, and the rotating shaft is parallel to the fixing rods; one end of the rotating shaft penetrates through the right cutter mounting seat to be connected with an output inner hole of the speed reducer, and the other end penetrates through the left cutter mounting seat to be connected with the sliding bearing seat; a plurality of sets of cutting plates and cutters are sleeved on the rotating shaft and are arranged at intervals; holes are formed in the cutting plate, and the rotating shaft and the fixing rod penetrate through the holes to fix the cutting plate. The fixing rod is further sleeved with a cutting plate distance ring. The top surface of the cutter mounting seat is connected with the cutter mounting beam; the rotating directions of the two groups of cutting tool assemblies are opposite; and the speed reducer is connected with the driving motor and is mounted on the cutter mounting seat. The cleaning device is suitable for special working conditions of the cold source water inlet runner and is high in cleaning efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant equipment maintenance, and in particular to a flexible plugging cutting tool for a cold source water inlet flow channel of a nuclear power plant. Background Art

[0002] During the operation of nuclear power plants, the cooling water inlet channel plays a vital role in providing cooling water for nuclear reactors to ensure the normal operation of nuclear power plants. However, when the cooling water inlet front interception system fails, a large number of flexible blockages may flow into the water inlet channel and accumulate on the interception grid. These flexible blockages may come from aquatic plants, garbage debris, etc. in the surrounding waters.

[0003] Due to the fast water flow rate, on the one hand, when manually cleaning these flexible blockages accumulated on the interception grid, the operators face a large water flow impact force, the operation is extremely difficult, and the cleaning efficiency is extremely low, which makes it difficult to meet the nuclear power plant's needs for timely cleaning of the cold source water inlet flow channel to restore normal water flow; on the other hand, when faced with such flexible blockages in high-speed water flow and accumulated in specific locations (interception grids), existing conventional cleaning tools are often unable to efficiently and thoroughly clean them due to the inability to effectively adapt to the water flow environment, difficulty in accurately positioning and cutting, and lack of targeted cutting structures.

[0004] Therefore, there is an urgent need for a special cutting tool that can quickly, efficiently and stably clean flexible blockages under special working conditions of the cold source water inlet flow channel of a nuclear power plant. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a flexible plugging cutting tool for a cold source water inlet flow channel of a nuclear power plant, which is suitable for special working conditions of the cold source water inlet flow channel and has high cleaning efficiency.

[0006] The present invention provides a flexible plugging cutting tool for a cold source water inlet flow channel of a nuclear power plant, comprising:

[0007] A tool mounting beam, with bottoming limiters mounted on both sides;

[0008] Two sets of cutting tool assemblies, each set of cutting tool assemblies includes a rotating shaft, a tool mounting seat, a fixing rod, a cutting plate, and a tool;

[0009] A rotating shaft and two fixing rods are arranged between the two tool mounting seats, and the rotating shaft is parallel to the fixing rods;

[0010] One end of the rotating shaft passes through the right tool mounting seat and is connected to the output inner hole of the reducer, and the other end passes through the left tool mounting seat and is connected to the sliding bearing seat;

[0011] A plurality of cutting plates and knives are sleeved on the rotating shaft, and the cutting plates and knives are arranged at intervals;

[0012] The cutting board is provided with a hole, through which the rotating shaft and the fixing rod respectively pass, so as to fix the cutting board;

[0013] The fixing rod is also provided with a cutting plate spacer ring for separating two adjacent cutting plates;

[0014] The top surface of the tool mounting seat is connected to the tool mounting beam;

[0015] The two groups of cutting tool assemblies rotate in opposite directions;

[0016] The reducer is connected to the drive motor and installed on the tool mounting seat.

[0017] The driving motor transmits power to the reducer connected thereto, thereby driving the cutting tool assembly to rotate, thereby achieving cutting of the flexible blockage.

[0018] In a specific implementation mode of the present invention, a non-powered cross cutting knife is also provided on the lower surface of the tool mounting beam;

[0019] The unpowered cross cutter is arranged in a blank area between two groups of cutting tool assemblies.

[0020] In a specific implementation manner of the present invention, the rotating shaft is an octagonal rotating shaft, which matches the size of the polygonal inner hole at the output end of the reducer.

[0021] In a specific embodiment of the present invention, the tool comprises a tool holder and a blade.

[0022] A through hole is provided in the middle of the tool holder, and the rotating shaft passes through the through hole;

[0023] The blades are evenly arranged on the outer circumference of the blade holder, and each blade holder is equipped with 6 blades.

[0024] In a specific embodiment of the present invention, the blade is hook-shaped.

[0025] In a specific embodiment of the present invention, the blades in two adjacent knives are arranged in directions that differ by an angle of 45°.

[0026] In a specific implementation manner of the present invention, a tool holder spacer is provided between the cutting plate and the tool.

[0027] In a specific implementation manner of the present invention, a shaft locking nut is provided at one end of the shaft away from the reducer for locking the outermost tool holder spacer.

[0028] In a specific implementation manner of the present invention, both ends of the fixing rod are locked on the tool mounting seat by fixing rod locking nuts.

[0029] In a specific implementation manner of the present invention, a sensor is also included, and the sensor monitors the pressure and flow of the driving motor during cutting, thereby forming a cleaning database.

[0030] Compared with the prior art, the flexible plugging cutting tool for the cold source water inlet flow channel of a nuclear power plant of the present invention has the following beneficial effects:

[0031] (1) The two sets of cutting tool assemblies can rotate forward and backward under the drive of the driving motor, and can quickly and widely cut the flexible blockages accumulated on the interception grid. The unique design of the hook-shaped blade can effectively guide the flexible blockage into the cutting range. Combined with the stable fulcrum provided by the close meshing of the blade and the cutting plate, and the design of the staggered angles between the blades, the cutting efficiency is greatly improved. A large amount of accumulated flexible blockages can be cut into pieces in a short time, and the flexible blockages that rush in head-on can be cut and crushed after a long time of underwater operation, which can effectively solve the problem of low cleaning efficiency in the prior art.

[0032] (2) The overall structure of the cutting and cleaning tool of the present invention is compact and reasonable. The tool mounting beam serves as the main support, and can be accurately placed in the appropriate position of the water inlet channel in conjunction with the bottom stoppers on both sides, and can remain stable even when the water flow rate is fast. At the same time, the application of various components such as the fixing rod and the sliding bearing seat effectively ensures the accurate movement and stable operation of the tool assembly in a high-speed water flow environment, and can well adapt to the special working conditions of the cold source water inlet channel of a nuclear power plant.

[0033] (3) In addition to the efficient cutting of the hook-shaped cutting tool assembly, the unpowered cross cutter can clean the blank area between the two hook-shaped cutting tool assemblies, thereby achieving full-section cleaning of the flexible blockages in the water inlet channel, avoiding the situation where the blockages are accumulated again due to incomplete cleaning and affecting the normal water flow of the cold source water inlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram showing the overall structure of a cutting and cleaning tool;

[0035] Figure 2 A schematic diagram showing the detailed structure of a hook-shaped cutting tool assembly;

[0036] Figure 3 A schematic diagram showing the operation of a cutting and cleaning tool;

[0037] In the figure, 1-tool mounting beam, 2-bottoming limiter, 3-cutting tool assembly, 4-unpowered cross cutting tool, 5-right tool mounting seat, 6-left tool mounting seat, 7-tool holder, 8-blade, 9-reducer, 10-drive motor, 11-rotating shaft, 12-rotating shaft locking nut assembly, 13-fixing rod, 14-fixing rod locking nut assembly, 15-cutting plate, 16-cutting plate spacer, 17-sliding bearing seat. DETAILED DESCRIPTION

[0038] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0039] The embodiment of the present invention discloses a flexible plug cutting tool for a cold source water inlet flow channel of a nuclear power plant, such as Figures 1-2 As shown, including:

[0040] A tool mounting beam 1, with bottom-contact limiting members 2 mounted on both sides;

[0041] The tool mounting beam 1 serves as the main supporting structure of the entire cutting and cleaning tool, providing a mounting base for other components, ensuring that each component can maintain a relatively stable position relationship under the impact of water flow, so as to collaboratively complete the cutting and cleaning work. A connecting plate is provided at the upper end, which can be connected to a carrying device that tows the tool.

[0042] The main function of the bottom stopper 2 is to ensure that the cutting and cleaning tool is in a suitable working position when the tool is lowered to the water inlet channel for cleaning operations, so as to avoid collision with the channel bottom due to excessive sinking, thereby damaging the equipment or affecting the cutting effect.

[0043] The cutting tool assembly 3 is provided with two groups, each group of the cutting tool assembly comprises a rotating shaft 11, a tool mounting seat, a fixing rod 13, a cutting plate 15, and a tool;

[0044] The tool mounting seat serves as a mounting support for the entire set of tools and is fixed on the tool mounting beam 1 by bolts.

[0045] A rotating shaft 11 and two fixing rods 13 are arranged between the two tool mounting seats, and the rotating shaft 11 is parallel to the fixing rods 13;

[0046] The two ends of the fixing rod 13 are locked on the tool mounting seat by fixing rod locking nuts 14 .

[0047] The rotating shaft 11 is the core rotating component of the cutting tool assembly 3.

[0048] One end of the rotating shaft 11 passes through the right tool mounting seat 5 and is connected to the output inner hole of the reducer 9 to provide a power transmission channel for the rotation of the tool, and the other end passes through the left tool mounting seat 6 and is connected to the sliding bearing seat 17;

[0049] The sliding bearing seat 17 provides support and rotation convenience for the rotating shaft 11, reduces the friction resistance when the rotating shaft 11 rotates, improves the power transmission efficiency, and ensures that the cutting tool assembly 3 can rotate smoothly to perform cutting operations.

[0050] The rotating shaft 11 is an octagonal rotating shaft 11, which matches the size of the polygonal inner hole at the output end of the reducer 9. Its unique multi-ribbed shape matches the size of the polygonal inner hole of the tool holder, which can ensure connection stability and power transmission efficiency.

[0051] The fixing rod 13 is used to install the cutter and the cutting plate spacer ring 16.

[0052] The rotating shaft 11 is sleeved with a plurality of cutting plates 15 and knives, and the cutting plates 15 and knives are arranged at intervals;

[0053] The tool comprises a tool holder 7 and a blade 8.

[0054] The blade holder 7 provides a mounting position for the blade 8.

[0055] A through hole is provided in the middle of the tool holder 7, and the rotating shaft 11 passes through the through hole;

[0056] The blades 8 are evenly arranged on the outer circumference of the blade holder 7 , and each blade holder 7 is equipped with 6 blades 8 .

[0057] The blades 8 are evenly distributed to fully cover the cutting area, thus avoiding cutting dead corners.

[0058] The blade 8 is hook-shaped, and this unique hook shape can skillfully guide the flexible blockage into the cutting and cleaning range. The blade 8 is fixed to the blade holder 7 by three screws to ensure that it will not loosen or fall off during high-speed rotation cutting, thereby ensuring the safety and reliability of the cutting operation.

[0059] The cutting plate 15 is provided with a hole, and the rotating shaft 11 and the fixing rod 13 pass through the hole respectively to fix the cutting plate 15;

[0060] The blades 8 in two adjacent knives are arranged in directions that differ by an angle of 45°.

[0061] The cutting plate 15 maintains a precise gap with the blade 8 and serves as a focus point during cutting, thereby improving cutting efficiency.

[0062] A tool rest spacer is arranged between the cutting plate 15 and the tool. A locking nut for the rotating shaft 11 is arranged at one end of the rotating shaft 11 away from the reducer 9 for locking the outermost tool rest spacer.

[0063] The fixing rod 13 is also provided with a cutting plate spacer ring 16 for separating two adjacent cutting plates 15 at equal distances;

[0064] The top surface of the tool mounting seat is connected to the tool mounting beam 1;

[0065] The lower surface of the tool mounting beam 1 is also provided with an unpowered cross cutting knife 4;

[0066] The unpowered cross cutter is arranged in the blank area between the two sets of cutting tool assemblies 3, and is used to clean the positions that cannot be cleaned by the rotating tool assembly.

[0067] The reducer 9 is connected to the drive motor 10 and mounted on the tool mounting seat.

[0068] The driving motor 10 transmits power to the reducer 9 connected thereto, thereby driving the cutting tool assembly 3 to rotate, thereby achieving cutting of the flexible blockage.

[0069] The reducer 9 is suitable for underwater use, and its main function is to reduce the speed and increase the torque of the power transmitted from the drive motor 10, so that the cutting tool assembly 3 can rotate at a suitable speed and torque to meet the cutting requirements of flexible blockages of different hardness and thickness.

[0070] The driving motor 10 is a hydraulic driving motor, which is used to drive the cutting tool assembly 3 to rotate. When hydraulic power is provided, the driving motor 10 transmits power to the reducer 9 connected thereto, thereby driving the cutting tool assembly 3 to rotate, thereby achieving cutting of the flexible blockage.

[0071] It also includes sensors, which monitor the pressure and flow of the drive motor 10 during cutting, thereby forming a cleaning database.

[0072] The present invention has the following requirements for the above components:

[0073] (1) Tool mounting beam: According to the design requirements, high-strength, corrosion-resistant metal materials such as stainless steel are selected and processed into tool mounting beam products that meet the size and precision requirements through cutting, welding and other processes. During the manufacturing process, the dimensional accuracy must be strictly controlled to ensure that it can accurately install other components.

[0074] (2) Install the bottoming stoppers on both sides of the beam: Also select suitable metal materials and use mechanical processing technology to manufacture bottoming stoppers with suitable shapes and sizes to ensure the accuracy and reliability of their bottoming function.

[0075] (3). Components of hook-type cutting tool assembly:

[0076] 1) Tool mounting seat 1: It is made of corrosion-resistant, high-strength metal material and processed into a finished tool mounting seat through cutting, welding and other processes. There are three holes on the mounting seat 1, corresponding to a rotating shaft 11 and two fixing rods 13 respectively. The precision requirement is high and needs to be ensured by precision machining.

[0077] 2) Rotating shaft 11: Made of corrosion-resistant, high-strength metal material, it is processed into a multi-corrugated shape through forging, turning and other processes to ensure its smooth surface and high dimensional accuracy so as to have a precise fit with the tool holder.

[0078] 3) The locking nut assembly 12 at the rotating shaft end is made of corrosion-resistant metal material and consists of a positioning ring and a double nut. Its size, strength and thread accuracy meet the requirements for fixing the outermost tool holder spacer. After installation, it is firmly locked and will not loosen.

[0079] 4) Fixed rod 13: It is made of corrosion-resistant, high-strength metal material and manufactured through precision turning and other processes to ensure that its straightness and surface roughness meet the requirements and provide support for the tool assembly.

[0080] 5) Fixed rod locking nut assembly 14: Made of corrosion-resistant metal material, it consists of a fastening nut and a locking nut. Its strength and thread accuracy meet the requirements for fixing the outermost tool holder spacer. After installation, it is firmly locked and does not loosen.

[0081] 6) Cutting plate 15: Made of wear-resistant and corrosion-resistant engineering plastic or metal material, it is processed into a spacer that meets the design size through laser cutting and other processes to ensure its matching accuracy with the blade.

[0082] 7) Cutting plate spacer ring 16: It is made of suitable engineering plastics or high-strength, corrosion-resistant metal materials and manufactured through mechanical processing technology to ensure that it can effectively separate and accurately position adjacent cutting plates to prevent inconsistent gaps between each tool holder.

[0083] 8) Tool holder 7: Made of corrosion-resistant and high-strength material, it is machined by a multi-axis CNC machine to ensure its structural dimensions and the convenience of installing the blade.

[0084] 9) Blade 8: High-strength, wear-resistant and corrosion-resistant materials are used to manufacture hook-shaped blades through forging, grinding and other processes to ensure the sharpness and strength of the blades. Then, threaded holes for installing screws are processed on the blades through drilling, tapping and other processes. The nuts for fixing the screws are required to be sunken into the blades.

[0085] 10) Sliding bearing seat 17: According to the design requirements, it is made of metal material, embedded with a bushing of low friction coefficient and high wear resistance material such as engineering plastic copper alloy, and can provide good support and rotation convenience for the multi-rotating shaft.

[0086] 11) Reducer 9: Use a professional underwater reducer product, select and debug it according to the power demand and connection requirements of the present invention, ensure that it can receive the power from the drive motor and perform deceleration and torque increase processing to provide matching torque for the tool assembly.

[0087] 12) Drive motor 10: Select a drive motor product suitable for underwater operations and with sufficient power output, and select, install and debug it according to the working requirements of the present invention.

[0088] (4) Non-powered cross cutter: High-strength, corrosion-resistant metal materials are used to manufacture the non-powered cross cutter through cutting, welding and other processes to ensure its structural strength and cutting capacity.

[0089] The installation method of the flexible plugging cutting tool for the cold source water inlet flow channel of a nuclear power plant described in the present invention is as follows:

[0090] (1) First, install the bottom limiters 2 on both sides of the two mounting beams on both sides of the tool mounting beam 1, and ensure that the connection is firm by welding or bolting to ensure the realization of the bottom limit function.

[0091] (2) Next, for each set of hook-shaped cutting tool components 3, assemble them in the following order:

[0092] 1) Assemble all the tool holders and blades included in the cutting and cleaning tool. Each tool holder 7 corresponds to six blades 8. Pay attention to the installation direction.

[0093] 2) Install the reducer on the right tool mounting seat 5;

[0094] 3) Fix the two fixed shafts to the right tool mounting seat 5 through the shaft end nut assembly;

[0095] 4) Connect the eight-cornered rotating shaft 11 to the output hole of the reducer 9. At this time, the three axes of one eight-cornered rotating shaft and two fixed shafts are in a parallel state;

[0096] 5) Install the first cutting plate 15, and match the three holes of the cutting plate 15 to the three shafts, and push them through and to the root of the eight-cornered rotating shaft 11;

[0097] 6) Install the first tool, pass it through the eight-cornered shaft 11, push it to the bottom and stick it to the tool holder spacer;

[0098] 7) Install the first row of cutting plate spacers 16, one for each fixing rod 13, two in total;

[0099] 8) Install the second cutting plate 15, and match the three holes of the cutting plate 15 to the three shafts, and push them through and to the root of the rotating shaft 11 of the eight-cornered plate;

[0100] 9) Install the second tool, pass it through the eight-cornered shaft 11, push it to the bottom and stick it to the second tool holder spacer;

[0101] 10) Install the second tool, rotate it 45° to form an angle with the first blade 8, pass it through the eight-cornered shaft, push it to the bottom and stick it to the tool holder spacer;

[0102] 11) Install the second row of cutting plate spacers 16, one for each fixing rod 13, two in total;

[0103] 12) Repeat the above steps until the cutting plate 15, the cutting plate spacer ring 16, and the cutter are all installed;

[0104] 13) Install the shaft nut locking assembly 12 and the end spacer to lock the entire set of tools;

[0105] 14) Install the fixing rod nut locking assembly 14, and lock the entire set of cutting plates 15 and cutting plate spacers 16;

[0106] 15) Install the left tool mounting seat 6;

[0107] 16) Install the sliding bearing seat 17;

[0108] 17) Finally, the assembled cutting tool assembly is connected to the reducer 9 to ensure smooth power transmission.

[0109] 18) The two assembled cutting tool assemblies 3 are respectively installed on both sides of the tool mounting beam 1, and the driving motor 10 is connected to the corresponding reducer 9 to ensure that the power can be smoothly transmitted to the cutting tool assembly 3 to drive it to rotate.

[0110] 19) Finally, the unpowered cross cutter 4 is installed at a suitable position on the tool mounting beam 1 to ensure that it can clean the tool cleaning blank area.

[0111] The initialization and debugging methods are as follows:

[0112] 1. Initialization settings

[0113] Before installing the cutting and cleaning tool in the cold source water inlet channel of a nuclear power plant for cleaning, the drive motor needs to be initialized. According to the actual water flow conditions of the water inlet channel and the approximate conditions of the flexible blockage, the output pressure, speed and other parameters of the drive motor are set to ensure that the tool assembly can perform cutting operations with appropriate power.

[0114] 2. Debugging work

[0115] Start the cutting and cleaning tool and observe the operating status of each component, especially the rotation of the cutting tool assembly, the cutting effect of the blade, and the working condition of the non-powered cross cutter. Check for abnormal conditions by monitoring the pressure sensor on the tool and manual observation, such as whether the components are loose, whether the blade cuts smoothly, whether the non-powered cross cutter can function normally, etc. If abnormalities are found, analyze the causes and make adjustments in a timely manner. For example, if the tool assembly does not rotate smoothly, it may be necessary to check whether the connection between the drive motor and the reducer is normal, whether the sliding bearing seat is working properly, etc., and take appropriate measures to repair it until the entire cutting and cleaning tool can operate normally and stably.

[0116] Examples of practical applications of the device of the present invention:

[0117] Assume that a large amount of flexible obstructions are accumulated on the interception grid in the cold source water inlet flow channel of a nuclear power plant, and it is necessary to use the cutting and cleaning tool of the present invention to clean it.

[0118] (1) Slowly lower the cutting and cleaning tool to the water inlet channel through the lifting equipment. During the lowering process, the appropriate position of the tool is determined by the bottoming limiters on both sides of the mounting beam, ensuring that the tool mounting beam is in a position where it can effectively cut and clean the flexible blockage.

[0119] (2) When the cutting and cleaning tool is in place, start the drive motor and output hydraulic power according to the parameters set in the initialization. The drive motor transmits power to the underwater reducer, which reduces the power and increases the torque, and then drives the two sets of hook-shaped cutting tool assemblies to start rotating.

[0120] (3) When the hook-shaped cutting tool assembly rotates, the hook-shaped blade first guides the flexible blockage into the cutting and cleaning range, and then the blade and the cutting plate are closely engaged, using a stable fulcrum to cut the flexible blockage. As the cutting proceeds, a large amount of flexible blockage is cut into smaller pieces.

[0121] (4) The non-powered cross cutter cleans the blank area between the two hook-shaped cutting tool assemblies.

[0122] (5) During the entire cutting and cleaning process, the operating status of each component of the cutting and cleaning tool, such as the operating parameters of the drive motor, the rotation speed of the tool assembly, etc., is continuously monitored, and the output parameters of the drive motor are adjusted in a timely manner according to the actual situation to ensure that the entire cutting and cleaning tool can efficiently and stably complete the cutting and cleaning of the flexible blockages in the cold source water inlet flow channel of the nuclear power plant and restore the smooth flow of the water inlet flow channel.

[0123] The present invention has the advantages of efficient cleaning, adaptability to special working conditions, ability to cut a wide range of objects, large cleaning and cutting torque, reliability and durability, and can effectively ensure the smooth flow of the cold source water inlet channel of a nuclear power plant.

[0124] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0125] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible plug cutting tool for a cold source water inlet channel of a nuclear power plant, characterized in that: include: A tool mounting beam, with bottoming limiters mounted on both sides; Two sets of cutting tool assemblies, each set of cutting tool assemblies includes a rotating shaft, a tool mounting seat, a fixing rod, a cutting plate, and a tool; A rotating shaft and two fixing rods are arranged between the two tool mounting seats, and the rotating shaft is parallel to the fixing rods; One end of the rotating shaft passes through the right tool mounting seat and is connected to the output inner hole of the reducer, and the other end passes through the left tool mounting seat and is connected to the sliding bearing seat; A plurality of cutting plates and knives are sleeved on the rotating shaft, and the cutting plates and knives are arranged at intervals; The cutting board is provided with a hole, through which the rotating shaft and the fixing rod respectively pass, so as to fix the cutting board; The fixing rod is also provided with a cutting plate spacer ring for separating two adjacent cutting plates; The top surface of the tool mounting seat is connected to the tool mounting beam; The two groups of cutting tool assemblies rotate in opposite directions; The reducer is connected to the drive motor and installed on the tool mounting seat. The driving motor transmits power to the reducer connected thereto, thereby driving the cutting tool assembly to rotate, thereby achieving cutting of the flexible blockage.

2. The flexible plug cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 1 is characterized in that: The lower surface of the tool mounting beam is also provided with a non-powered cross cutting knife; The unpowered cross cutter is arranged in a blank area between two groups of cutting tool assemblies.

3. The flexible plug cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 1 is characterized in that: The rotating shaft is an octagonal rotating shaft, which matches the size of the polygonal inner hole at the output end of the reducer.

4. The flexible plug cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 1 is characterized in that: The tool comprises a tool holder and a blade. A through hole is provided in the middle of the tool holder, and the rotating shaft passes through the through hole; The blades are evenly arranged on the outer circumference of the blade holder, and each blade holder is equipped with 6 blades.

5. The flexible plugging cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 4 is characterized in that: The blade is hook-shaped.

6. The flexible plugging cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 5 is characterized in that: The blades in two adjacent knives are arranged at an angle of 45°.

7. The flexible plug cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 1 is characterized in that: A tool holder spacer is arranged between the cutting plate and the tool.

8. The flexible plugging cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 7 is characterized in that: The end of the rotating shaft away from the reducer is provided with a rotating shaft locking nut for locking the outermost tool holder spacer.

9. The flexible plug cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 1, characterized in that: The two ends of the fixing rod are locked on the tool mounting seat by fixing rod locking nuts.

10. The flexible plug cutting tool for the cold source water inlet channel of a nuclear power plant according to claim 1, characterized in that: The device also includes a sensor, which monitors the pressure and flow of the driving motor during cutting, thereby forming a cleaning database.

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