Flexible plug cutting tool for nuclear power plant cold leg inlet flow channel

Abstract

The present application relates to nuclear power plant equipment maintenance technical field, especially to a kind of for nuclear power plant cold source water inlet channel flexible blockage cutting tool.The tool includes: cutter installation beam, both sides are equipped with bottom limiting piece;Two groups of cutting tool components, each group of cutting tool component includes rotating shaft, cutter installation seat, fixed rod, cutting plate, cutter;Two cutter installation seats are equipped with rotating shaft and two fixed rods, rotating shaft is parallel with fixed rod;Rotating shaft one end passes through right cutter installation seat and the output inner hole of speed reducer connection, the other end passes through left cutter installation seat and connects sliding bearing seat;Rotating shaft is sleeved with several sets of cutting plate and cutter, cutting plate and cutter are arranged at intervals;Cutting plate is equipped with hole, rotating shaft and fixed rod respectively from hole, cutting plate is fixed;Fixed rod is also equipped with cutting plate spacer ring;The top surface of cutter installation seat is connected with cutter installation beam;The rotating direction of two groups of cutting tool components is opposite;Speed reducer, connected with driving motor, is installed on cutter installation seat.The present application is suitable for the special working condition of cold source water inlet channel, and cleaning efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power plant equipment maintenance, and particularly relates to a flexible blockage cutting tool for a cold source water inlet flow channel of a nuclear power plant. BACKGROUND

[0002] In the operation process of a nuclear power plant, the cold source water inlet flow channel plays a crucial role, which provides cooling water for a nuclear reactor to ensure the normal operation of the nuclear power plant. However, when the front-end interception system of the cooling water inlet fails, a large amount of flexible blockage may flow into the water inlet flow channel and accumulate in the interception grid. These flexible blockages may come from aquatic plants, garbage fragments and the like in the surrounding water area.

[0003] Due to the fast water flow speed, on the one hand, when manually cleaning the flexible blockages accumulated in the interception grid, the operation personnel faces a large water flow impact force, the operation is extremely difficult, and the cleaning efficiency is extremely low, which is difficult to meet the needs of the nuclear power plant for timely cleaning and recovery of the normal water flow of the cold source water inlet flow channel; on the other hand, the existing conventional cleaning tools often cannot effectively adapt to the water flow environment, cannot be accurately positioned and cut, and lack targeted cutting structures when facing the flexible blockages in the high-speed water flow and accumulated in the specific position (interception grid), so that the flexible blockages cannot be efficiently and completely cleaned.

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

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

[0006] The present application provides a flexible blockage cutting tool for a cold source water inlet flow channel of a nuclear power plant, which comprises:

[0007] A cutter mounting beam is provided with a bottom-touching limiting piece on both sides;

[0008] Two groups of cutting tool assemblies are provided, each group of cutting tool assemblies comprising a rotating shaft, a cutter mounting seat, a fixing rod, a cutting plate and a cutter;

[0009] 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;

[0010] One end of the rotating shaft penetrates through the right cutter mounting seat and is connected with the output inner hole of a speed reducer, and the other end penetrates through the left cutter mounting seat and is connected with a sliding bearing seat;

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

[0012] The cutting plate is provided with holes, through which the rotating shaft and the fixing rod pass to fix the cutting plate.

[0013] The fixing rod is also fitted with a cutting plate spacer ring to separate two adjacent cutting plates;

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

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

[0016] The speed reducer, connected to the drive motor, is mounted on the tool mount.

[0017] The drive motor transmits power to the connected reducer, which in turn drives the cutting tool assembly to rotate, thereby cutting the flexible blockage.

[0018] In a specific embodiment of the present invention, a non-powered cross-cutting blade is further provided on the lower surface of the tool mounting beam;

[0019] The unpowered cross cutter is positioned in the blank area between the two sets of cutting tool assemblies.

[0020] In a specific embodiment 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 cutting tool includes a tool holder and a blade.

[0022] The tool holder has a through hole in the middle, and the rotating shaft passes through the through hole;

[0023] The blades are evenly arranged on the outer circumference of the tool holder, with 6 blades installed on each tool holder.

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

[0025] In a specific embodiment of the present invention, the cutting blades in two adjacent cutting tools are arranged at an angle of 45° apart.

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

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

[0028] In a specific embodiment of the present invention, both ends of the fixing rod are locked to the tool mounting base by fixing rod locking nuts.

[0029] In one specific implementation of the present invention, a sensor is also included, which monitors the pressure and flow rate during the cutting process of the drive motor, thereby forming a cleanup database.

[0030] Compared with the prior art, the flexible blockage cutting tool for the cold source inlet water channel of the present invention has the following advantages:

[0031] (1) By rotating in both directions under the drive of a motor, two sets of cutting blade assemblies can quickly and over a large area cut flexible blockages accumulated on the interception grid. The unique design of the hook-shaped blades can effectively guide the flexible blockages into the cutting range. Combined with the stable force point provided by the close meshing of the blades and the cutting plate, and the staggered design between the blades, the cutting efficiency is greatly improved. It can cut up a large amount of accumulated flexible blockages in a short time, and can also cut and break up flexible blockages that rush into the water during long-term underwater operation, which can effectively solve the problem of low cleaning efficiency in the prior art.

[0032] (2) The cutting and cleaning tool of the present invention has a compact and reasonable overall structure. The tool mounting beam serves as the main support, and together with the bottom-reaching limiters on both sides, it can be accurately placed in the appropriate position in the water inlet channel, maintaining stability even when the water flow rate is high. 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 the high-speed water flow environment, and can well adapt to the special working conditions of the cold source water inlet channel of nuclear power plants.

[0033] (3) In addition to the efficient cutting of the hook-shaped cutting tool assembly, the non-powered cross cutter can clean the blank area between the two hook-shaped cutting tool assemblies, thereby achieving full-section cleaning of the flexible blockage in the water inlet channel, avoiding the situation where the blockage accumulates again due to incomplete cleaning and affects the normal water flow of the cold source water inlet channel. Attached Figure Description

[0034] Fig. 1 This diagram shows the overall structure of the cutting and cleaning tool.

[0035] Fig. 2 This diagram shows the detailed structure of the hook-shaped cutting tool assembly.

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

[0037] In the diagram, 1-tool mounting beam, 2-bottom stop, 3-cutting tool assembly, 4-non-powered cross-cutting blade, 5-right tool mounting seat, 6-left tool mounting seat, 7-tool holder, 8-blade, 9-reducer, 10-drive motor, 11-shaft, 12-shaft locking nut assembly, 13-fixed rod, 14-fixed rod locking nut assembly, 15-cutting plate, 16-cutting plate spacer ring, 17-sliding bearing seat. Detailed Implementation

[0038] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0039] An embodiment of the present invention discloses a tool for cutting flexible blockages in the cold source inlet water channel of a nuclear power plant, such as... Figs. 1-2 As shown, it includes:

[0040] The tool mounting beam 1 has bottom-contact limiting components 2 installed on both sides;

[0041] The tool mounting beam 1 serves as the main support structure for the entire cutting and cleaning tool, providing a mounting base for other components and ensuring that each component maintains a relatively stable position 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 for connection to the mounting device that tows it during operation.

[0042] The main function of the bottom-reaching limiter 2 is to ensure that the cutting and cleaning tool is in a proper working position when it is lowered into the water inlet channel for cleaning operations, so as to avoid damage to the equipment or affect the cutting effect due to excessive sinking and collision with the bottom of the channel.

[0043] The cutting tool assembly 3 is provided in two sets. Each cutting tool assembly includes a rotating shaft 11, a tool mounting seat, a fixing rod 13, a cutting plate 15, and a tool.

[0044] The tool mounting base serves as the mounting support for the entire tool set and is fixed to the tool mounting beam 1 by bolts.

[0045] A rotating shaft 11 and two fixing rods 13 are provided between the two tool mounting seats, with the rotating shaft 11 and the fixing rods 13 being parallel.

[0046] Both ends of the fixing rod 13 are locked to the tool mounting base by the fixing rod locking nut 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 connects to the output inner hole of the reducer 9, providing a power transmission channel for the rotation of the tool; the other end passes through the left tool mounting seat 6 and connects to the sliding bearing seat 17.

[0049] The sliding bearing housing 17 provides support and facilitates the rotation of the shaft 11, reduces the frictional resistance when the 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 polygonal inner hole size of the output end of the reducer 9. Its unique multi-faceted shape matches the polygonal inner hole size of the tool holder, which can ensure connection stability and power transmission efficiency.

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

[0052] Several sets of cutting plates 15 and knives are sleeved on the rotating shaft 11, with the cutting plates 15 and knives arranged at intervals.

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

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

[0055] The tool holder 7 has a through hole in the middle, and the rotating shaft 11 passes through the through hole;

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

[0057] The blades 8 are evenly distributed, fully covering the cutting area and avoiding any dead corners.

[0058] The blade 8 is hook-shaped, which cleverly guides flexible blockages into the cutting and cleaning range. The blade 8 is fixed to the blade holder 7 with three screws to ensure that it will not loosen or fall off during high-speed rotation cutting, thus guaranteeing the safety and reliability of the cutting operation.

[0059] The cutting plate 15 is provided with holes, and the rotating shaft 11 and the fixing rod 13 pass through the holes to fix the cutting plate 15.

[0060] The blades 8 in two adjacent cutting tools are set at an angle of 45° apart.

[0061] The cutting plate 15 and the blade 8 maintain a precise gap, which serves as the point of force during cutting and improves cutting efficiency.

[0062] A tool holder spacer is provided between the cutting plate 15 and the cutting tool. A locking nut is provided at the end of the rotating shaft 11 away from the reducer 9 to lock the outermost tool holder spacer.

[0063] The fixing rod 13 is also fitted with a cutting plate spacer ring 16, which is used to separate two adjacent cutting plates 15 at equal distances.

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

[0065] The lower surface of the tool mounting beam 1 is also provided with a non-powered cross-cutting blade 4;

[0066] The non-powered cross cutter is positioned in the blank area between the two sets of cutting tool assemblies 3, and is used to clean areas that the rotating tool assembly cannot reach.

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

[0068] The drive motor 10 transmits power to the reducer 9 connected to it, which in turn drives the cutting tool assembly 3 to rotate, thereby cutting the flexible blockage.

[0069] The reducer 9 is a reducer suitable for underwater use. 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 needs of flexible blockages with different hardness and thickness.

[0070] The drive motor 10 is a hydraulic drive motor. It is used to drive the cutting tool assembly 3 to rotate. When hydraulic power is provided, the drive motor 10 transmits power to the reducer 9 connected to it, thereby driving the cutting tool assembly 3 to rotate and achieve the cutting of flexible blockages.

[0071] It also includes sensors that monitor the pressure and flow rate when the drive motor 10 is cutting, thereby forming a cleanup database.

[0072] The requirements of this invention for the above-mentioned components are as follows:

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

[0074] (2) Bottom-contact limiting components on both sides of the installation beam: Similarly, select appropriate metal materials and manufacture bottom-contact limiting components with appropriate shape and size through machining process to ensure the accuracy and reliability of its bottom-contact function.

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

[0076] 1) Tool Mount 1: Made of corrosion-resistant, high-strength metal material, the tool mount is manufactured through cutting, welding and other processes. Mount 1 has three holes, corresponding to one rotating shaft 11 and two fixing rods 13 respectively. High precision is required, and precision machining is necessary to ensure accuracy.

[0077] 2) Shaft 11: Made of corrosion-resistant, high-strength metal material, it is processed into a multi-ribbed 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) Shaft end locking nut assembly 12: made of corrosion-resistant metal material, consisting of a positioning ring and double nuts. Its size, strength and thread accuracy meet the requirements for fixing the outermost tool holder spacer. After installation, it is firmly locked and does not loosen.

[0079] 4) Fixing rod 13: 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, providing support for the tool assembly.

[0080] 5) Fixing rod locking nut assembly 14: made of corrosion-resistant metal material, consisting of fastening nut and locking nut, its strength and thread accuracy meet the requirements for fixing the outermost tool holder spacer, and it is firmly locked after installation and does not loosen.

[0081] 6) Cutting plate 15: Made of wear-resistant and corrosion-resistant engineering plastics or metal materials, and processed into spacers that meet the design dimensions through laser cutting and other processes to ensure the precision of its fit with the blade.

[0082] 7) Cutting plate spacer ring 16: Made of suitable engineering plastics or high-strength, corrosion-resistant metal materials, manufactured through machining processes to ensure that it can effectively separate and accurately position adjacent cutting plates, preventing inconsistent gaps between the cutter holders.

[0083] 8) Tool holder 7: Made of corrosion-resistant, high-strength materials and manufactured by multi-axis CNC machining to ensure its structural dimensions and ease of tool installation.

[0084] 9) Blade 8: Made of high-strength, wear-resistant and corrosion-resistant materials, the hook-shaped blade is manufactured through forging, grinding and other processes to ensure the sharpness and strength of the blade. Then, through drilling, tapping and other processes, threaded holes for installing screws are machined on the blade, requiring the nut of the fixing screw to be recessed into the blade.

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

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

[0087] 12) Drive motor 10: Select a drive motor product suitable for underwater operation 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 selected and manufactured through cutting, welding and other processes to ensure its structural strength and cutting ability.

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

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

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

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

[0093] 2) Install the reducer on the right-side tool mounting bracket 5;

[0094] 3) Secure the two fixed shafts to the right-side tool mounting base 5 using the shaft end nut assembly;

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

[0096] 5) Install the first cutting plate 15, align the three holes of the cutting plate 15 with the three shafts mentioned above, pass it through and push it to the root of the octagonal rotating shaft 11.

[0097] 6) Install the first tool by passing it through the octagonal pivot 11, pushing it all the way down and against the tool holder spacer.

[0098] 7) Install the first row of cutting plate spacer rings 16, one spacer ring for each fixing rod 13, for a total of two;

[0099] 8) Install the second cutting plate 15, align the three holes of the cutting plate 15 with the three shafts mentioned above, pass it through and push it to the root of the octagonal rotating shaft 11;

[0100] 9) Install the second tool by passing it through the octagonal pivot 11, pushing it all the way down and attaching it to the second tool holder spacer.

[0101] 10) Install the second cutter, rotate it 45° to form an angle with the first cutter 8, pass it through the octagonal pivot, push it to the bottom and stick it to the cutter holder spacer;

[0102] 11) Install the second row of cutting plate spacer rings 16, one spacer ring for each fixing rod 13, for a total of two;

[0103] 12) Repeat the above steps until the cutting plate 15, the cutting plate spacer ring 16, and the cutting tool 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 to lock the entire set of cutting plates 15 and cutting plate spacers 16;

[0106] 15) Install the left-side tool mounting bracket 6;

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

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

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

[0110] 19) Finally, install the non-powered cross cutter 4 in the appropriate 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 tools in the cold source inlet water channel of a nuclear power plant for cleaning operations, the drive motor needs to be initialized. Based on the actual water flow conditions in the inlet water channel and the approximate condition 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 blades, and the operation of the unpowered cross cutter. Check for any abnormalities by monitoring the pressure sensors on the tool and by manual observation, such as whether components are loose, whether the blades cut smoothly, and whether the unpowered cross cutter functions properly. If any abnormalities are found, analyze the cause and make adjustments promptly. 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 them until the entire cutting and cleaning tool can operate normally and stably.

[0116] Practical application examples of the device described in this invention:

[0117] Suppose that a large amount of flexible blockage accumulates on the intercepting grid in the cold source inlet channel of a nuclear power plant, the cutting and cleaning tool of this invention needs to be used for cleaning.

[0118] (1) The cutting and cleaning tool is slowly lowered into the water inlet channel by hoisting equipment. During the lowering process, the tool is positioned by relying on the bottom-reaching limiters on both sides of the mounting beam to ensure that the tool mounting beam is in a position that can effectively cut and clean the flexible blockage.

[0119] (2) Once the cutting and cleaning tools are in place, start the drive motor and output hydraulic power according to the initial settings. The drive motor transmits power to the underwater reducer, which reduces the power and increases the torque, 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. Then, the blade engages tightly with the cutting plate, using a stable point of force to cut the flexible blockage. As the cutting proceeds, a large amount of flexible blockage is cut into smaller fragments.

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

[0122] (5) Throughout the entire cutting and cleaning process, continuously monitor the operating status of each component of the cutting and cleaning tool, such as the operating parameters of the drive motor and the rotation speed of the tool assembly. Adjust the output parameters of the drive motor 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 blockage in the cold source water inlet channel of the nuclear power plant and restore the smooth flow of the water inlet channel.

[0123] This invention has the advantages of high efficiency in cleaning, adaptability to special working conditions, ability to cut a wide variety of objects, large cleaning and cutting torque, and reliability and durability, and can effectively ensure the smooth flow of cold source water inlet channels in nuclear power plants.

[0124] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0125] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tool for cutting flexible blockages in the cold source inlet water channel of a nuclear power plant, characterized in that, include: The tool mounting beam has bottom-contact limiting components installed on both sides; Two sets of cutting tool assemblies, each set of cutting tool assemblies includes a rotating shaft, a tool mounting base, a fixing rod, a cutting plate, and a cutting tool; A rotating shaft and two fixing rods are provided between the two tool mounting seats of each cutting tool assembly, with the rotating shaft and fixing rods parallel to each other; One end of the rotating shaft passes through the right tool mounting seat and connects to the output inner hole of the reducer, while the other end passes through the left tool mounting seat and connects to the sliding bearing seat. Several sets of cutting plates and knives are sleeved on the rotating shaft, and the cutting plates and knives are arranged at intervals. The cutting tool includes a tool holder and a blade. The tool holder has a through hole in the middle, and the rotating shaft passes through the through hole; The blades are evenly arranged on the outer circumference of the tool holder, with 6 blades installed in each tool holder; the blades are hook-shaped; the blades in two adjacent tools are arranged at an angle of 45°. The cutting plate is provided with holes, through which the rotating shaft and the fixing rod pass to fix the cutting plate. The fixing rod is also fitted with a cutting plate spacer ring to separate two adjacent cutting plates; The top surface of the tool mounting base is connected to the tool mounting beam; The two sets of cutting tool assemblies rotate in opposite directions; The lower surface of the tool mounting beam is also provided with a non-powered cross-cutting blade; The unpowered cross-cutting blade is positioned in the blank area between the two sets of cutting blade assemblies; The speed reducer, connected to the drive motor, is mounted on the tool mount. The drive motor transmits power to the connected reducer, which in turn drives the cutting tool assembly to rotate, thereby cutting the flexible blockage.

2. The tool for cutting flexible blockages in the cold source inlet channel of a nuclear power plant according to claim 1, 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.

3. The tool for cutting flexible blockages in the cold source inlet channel of a nuclear power plant according to claim 1, characterized in that, A tool holder spacer is provided between the cutting plate and the cutting tool.

4. The tool for cutting flexible blockages in the cold source inlet channel of a nuclear power plant according to claim 3, characterized in that, The end of the shaft furthest from the reducer is provided with a shaft locking nut, which is used to lock the outermost tool holder spacer.

5. The tool for cutting flexible blockages in the cold source inlet channel of a nuclear power plant according to claim 1, characterized in that, Both ends of the fixing rod are locked to the tool mounting base by fixing rod locking nuts.

6. The tool for cutting flexible blockages in the cold source inlet channel of a nuclear power plant according to claim 1, characterized in that, It also includes sensors that monitor the pressure and flow rate of the drive motor during cutting in real time, thereby forming a cleanup database.

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