A special tool for quickly cleaning the top sealing surface of a nuclear power plant ring container

Abstract

The utility model discloses a special tool for the quick cleaning of the top sealing surface of a nuclear power plant annular container, comprising an annular frame, an annular groove is formed in the interior of the annular frame, a rotating gear ring is movably connected in the interior of the annular groove, a rotating drive assembly is installed on the annular frame to drive the movement of the rotating gear ring, a first electric telescopic rod is installed at the bottom end of the rotating gear ring, and a rotating assembly is installed at the telescopic end of the first electric telescopic rod. In the utility model, the special tool can realize remote cleaning, and the cooperation of multiple components maintains a certain working distance from the sealing surface, greatly shortens the irradiation time of personnel, liberates the working personnel from the high radiation environment, effectively reduces the radiation hazard, and guarantees the life and health of the working personnel. The special tool can precisely fit the complex profile of the sealing surface through a precision mechanical structure, and the cleaning efficiency is several times higher than that of manual cleaning.

Description

Technical Field

[0001] This utility model belongs to the technical field of nuclear power plant cleaning tools, specifically, it relates to a special tool for rapid cleaning of the sealing surface of the top of a nuclear power plant annular container. Background Technology

[0002] The sealing surface of the annular reactor vessel at a nuclear power plant is constantly exposed to high temperatures, high pressures, and strong radiation, making it prone to accumulating dirt, rust, silver powder, and boron crystals. This severely threatens the sealing performance and could even lead to radioactive material leaks. Currently, the mainstream cleaning method is manual operation, with maintenance personnel relying on tools such as scrapers, sandpaper, scouring pads, and wiping paper. When cleaning the sealing groove of the reactor pressure vessel top cover, workers must squat for extended periods in a high-radiation environment, resulting in extremely high labor intensity and a high risk of exposure to radiation doses and contamination of their skin. Furthermore, the quality of manual cleaning is inconsistent, and incomplete cleaning is highly likely. If this leads to pressure vessel seal failure, it will delay the main overhaul schedule and cause significant economic losses. Existing simple cleaning tools and equipment are also insufficient to meet the cleaning requirements of the sealing surface of the annular reactor vessel at a nuclear power plant.

[0003] There are currently no effective solutions to the problems in the relevant technologies.

[0004] Therefore, in order to solve the above problems, this utility model provides a special tool for rapid cleaning of the sealing surface of the top of the annular container of a nuclear power plant. Utility Model Content

[0005] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a special tool for rapid cleaning of the sealing surface of the top of the annular container of a nuclear power plant.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A special tool for rapid cleaning of the top sealing surface of a nuclear power plant annular container includes an annular frame with an annular groove inside. A rotating toothed ring is movably connected inside the annular groove. A rotation drive assembly for driving the rotating toothed ring is installed on the annular frame. A first electric telescopic rod is installed at the bottom end of the rotating toothed ring, and a rotating assembly is installed at the telescopic end of the first electric telescopic rod.

[0008] The rotating assembly includes a first mounting base fixedly installed at the telescopic end of the first electric telescopic rod, a rotating seat rotatably connected to the first mounting base, and a support base fixedly installed on the rotating seat;

[0009] A second electric telescopic rod is fixedly installed on one side of the support base;

[0010] The telescopic end of the second electric telescopic rod is equipped with a cleaning component;

[0011] The cleaning assembly includes a second mounting bracket fixedly installed at the telescopic end of the second electric telescopic rod, and a cleaning brush head is detachably mounted on the second mounting bracket;

[0012] A vacuuming component is located below the cleaning component.

[0013] Furthermore, the rotation drive assembly includes a motor base fixedly mounted on the outer circumferential wall of the annular frame, a reduction motor fixedly mounted at the bottom end of the motor base, a gear mounted at the output end of the reduction motor, and the reduction motor meshing with the teeth on the rotating gear ring.

[0014] Furthermore, a first rotating rod is fixedly connected through the rotating seat. One end of the first rotating rod is inserted into the inner wall of one side of the first mounting seat, and the other end is connected through to the other side of the first mounting seat, with the other end extending out of the first mounting seat.

[0015] Furthermore, a ratchet is fixedly installed on one end of the first rotating rod that extends outside the first mounting base, and a pawl is movably installed on the outer wall of the first mounting base, the pawl cooperating with the ratchet.

[0016] Furthermore, both sides of the second mounting bracket are slidably connected with pull rods. The end of the pull rod inside the second mounting bracket is fixedly installed with a limiting seat. The end of the limiting seat away from the pull rod has a slot. A spring is also sleeved on the pull rod and is disposed between the limiting seat and the side wall of the second mounting bracket. The end of the pull rod outside the second mounting bracket is fixedly installed with a handle. A second rotating rod is connected through the cleaning brush head. The two ends of the second rotating rod are respectively inserted into the slots on the two sets of limiting seats.

[0017] Furthermore, the dust collection assembly includes a collection plate disposed below the second mounting bracket, a connecting bracket is fixedly installed on one side of the collection plate, one end of the connecting bracket is inserted into the side wall of the second mounting bracket, a filter screen is detachably installed inside the collection plate, one end of a dust collection pipe is connected to the bottom of the collection plate, and the other end of the dust collection pipe is connected to an exhaust fan, which is installed at the bottom of the rotating base.

[0018] Furthermore, a signal transceiver controller is installed on the support base. The signal transceiver controller is wirelessly connected to an external remote control device. The signal transceiver controller is electrically connected to the geared motor, the first electric telescopic rod, the second electric telescopic rod, and the exhaust fan. The geared motor is powered by an external power source. The first electric telescopic rod, the second electric telescopic rod, and the exhaust fan all have built-in batteries.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In this utility model, this special tool enables remote cleaning. Through the coordinated action of multiple components, it maintains a certain working distance from the sealing surface, significantly reducing the exposure time of personnel, freeing workers from high-radiation environments, effectively reducing radiation hazards, and protecting the health and lives of workers. This special tool, through its precision mechanical structure, can accurately conform to the complex contours of the sealing surface, increasing cleaning efficiency several times compared to manual cleaning.

[0021] 2. In this invention, a rotating drive assembly drives a rotating gear ring to rotate, which in turn drives the rotating assembly to revolve. This rotation of the rotating assembly causes the cleaning assembly to rotate, thus adjusting its position. Combined with the extension and retraction of the second electric telescopic rod, this adjustment allows for a more comprehensive cleaning of the sealing surface at the top of the annular container. The first electric telescopic rod adjusts the height of the cleaning assembly, ensuring it contacts the sealing surface and allowing for easy replacement and maintenance after cleaning. The second electric telescopic rod extends and retracts, causing the cleaning brush head to roll on the sealing surface, removing scale, grease, and other impurities. A dust collection assembly collects the removed impurities and absorbs radioactive dust during the cleaning process, preventing its spread. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first-view overall structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0025] Figure 3 This is a partial structural schematic diagram of the present invention;

[0026] Figure 4 For the present utility model Figure 3 A sectional view;

[0027] Figure 5 This is an enlarged view of section A of this utility model.

[0028] Figure label:

[0029] 1. Ring frame; 2. Rotary gear ring; 3. Rotation drive assembly; 31. Motor base; 32. Gear motor; 33. Gear; 4. First electric telescopic rod; 5. Rotation assembly; 51. First mounting base; 52. Rotating base; 53. First rotating rod; 54. Support base; 55. Ratchet; 56. Pawl; 6. Second electric telescopic rod; 7. Cleaning assembly; 71. Second mounting bracket; 72. Cleaning brush head; 73. Second rotating rod; 74. Limit seat; 75. Pull rod; 76. Spring; 77. Handle; 8. Vacuum assembly; 81. Collection plate; 82. Vacuum hose; 83. Exhaust fan; 84. Connecting frame; 85. Filter screen; 9. Signal transceiver controller. Detailed Implementation

[0030] The utility model will now be further described with reference to the accompanying drawings and specific embodiments:

[0031] Please see Figure 1 and Figure 2According to an embodiment of this utility model, a special tool for rapid cleaning of the top sealing surface of a nuclear power plant annular container includes an annular frame 1. An annular groove is formed inside the annular frame 1, and a rotating gear ring 2 is movably connected inside the annular groove. A rotation drive assembly 3 is mounted on the annular frame 1 to drive the rotating gear ring 2. A first electric telescopic rod 4 is mounted at the bottom end of the rotating gear ring 2, and a rotating assembly 5 is mounted at the telescopic end of the first electric telescopic rod 4. The rotating assembly 5 includes a first mounting base 51 fixedly mounted at the telescopic end of the first electric telescopic rod 4, a rotating seat 52 rotatably connected to the first mounting base 51, and a support base 54 fixedly mounted on the rotating seat 52. A second electric telescopic rod 6 is fixedly mounted on one side of the support base 54. A cleaning assembly 7 is mounted at the telescopic end of the second electric telescopic rod 6. The rotation drive assembly 3 drives the rotating gear ring 2 to rotate, which in turn drives the rotating assembly 5 to revolve. As the rotating assembly 5 rotates, it drives the cleaning assembly 7 to rotate, thereby adjusting the position of the cleaning assembly 7. The second electric telescopic rod 6, in conjunction with its extension and retraction, adjusts the position of the cleaning component 7, enabling a more comprehensive cleaning of the sealing surface at the top of the annular container. The first electric telescopic rod 4 adjusts the height of the cleaning component 7, allowing it to contact the sealing surface at the top of the annular container and lowering it after cleaning for easier replacement and maintenance. The cleaning component 7 includes a second mounting bracket 71 fixedly installed at the telescopic end of the second electric telescopic rod 6. A cleaning brush head 72 is detachably mounted on the second mounting bracket 71. As the second electric telescopic rod 6 extends and retracts, the cleaning brush head 72 rolls on the sealing surface at the top of the annular container, cleaning away scale, grease, and other impurities. A vacuuming component 8 is located below the cleaning component 7, collecting the cleaned impurities and absorbing radioactive dust during the cleaning process to prevent its spread.

[0032] Please see Figure 1 The rotation drive assembly 3 includes a motor base 31 fixedly installed on the outer circumferential wall of the annular frame 1. A reduction motor 32 is fixedly installed at the bottom end of the motor base 31. A gear 33 is installed at the output end of the reduction motor 32. The reduction motor 32 meshes with the teeth on the rotating gear ring 2. The reduction motor 32 drives the gear 33 to rotate, and the gear 33 drives the rotating gear ring 2 to rotate, thereby driving the cleaning assembly 7 to rotate.

[0033] Please see Figure 1 , Figure 4 and Figure 5A first rotating rod 53 is fixedly connected through the rotating base 52. One end of the first rotating rod 53 is inserted into the inner wall of one side of the first mounting base 51, and the other end is connected through to the other side of the first mounting base 51, with the other end extending out of the first mounting base 51. The first rotating rod 53 can rotate on the first mounting base 51, thereby allowing the support base 54 to rotate. When it is necessary to clean or replace the cleaning brush head 72, the collection plate 81, and the filter screen 85, the height of the first mounting base 51 can be lowered by the telescopic action of the first electric telescopic rod 4. When the first electric telescopic rod 4 is extended to its maximum range, the operator can then... If the cleaning brush head 72 is still inaccessible, the first mounting base 51 can be rotated to further lower the height of the cleaning brush head 72, the collection plate 81, and the filter screen 85, making them easily accessible to the operator. A ratchet 55 is fixedly mounted on one end of the first rotating rod 53 that extends outside the first mounting base 51. A pawl 56 is also movably mounted on the outer wall of the first mounting base 51. The pawl 56 and the ratchet 55 cooperate with each other, and through the action of the pawl 56 and the ratchet 55, the first rotating rod 53 can be limited, thereby ensuring that the cleaning brush head 72 remains horizontal with the sealing surface of the top of the annular container during operation.

[0034] Please see Figure 4 A pull rod 75 is slidably connected to both sides of the second mounting bracket 71. A limiting seat 74 is fixedly installed at the end of the pull rod 75 inside the second mounting bracket 71. A slot is provided at the end of the limiting seat 74 away from the pull rod 75. A spring 76 is also sleeved on the pull rod 75, positioned between the limiting seat 74 and the side wall of the second mounting bracket 71. A handle 77 is fixedly installed at the end of the pull rod 75 outside the second mounting bracket 71. A second rotating rod 73 is connected through the cleaning brush head 72. Both ends of the second rotating rod 73 are inserted into the slots on the two sets of limiting seats 74. By pulling the pull rod 75, the limiting seats 74... The position is adjustable, which facilitates the installation of the cleaning brush head 72. One end of the second rotating rod 73 is inserted into the slot on a set of limiting seats 74, and then the other set of pull rods 75 is pulled so that the second rotating rod 73 can move between the two sets of limiting seats 74. Then the other end of the second rotating rod 73 is inserted into the slot on the set of limiting seats 74. Through the restoring force of the spring 76, the second rotating rod 73 can be limited and fixed. Since the distance between the two sets of limiting seats 74 is adjustable, different sizes of cleaning brush heads 72 can be installed. Different cleaning brush heads 72 can be replaced according to the actual situation to clean different impurities.

[0035] Please see Figure 2 and Figure 4The dust collection assembly 8 includes a collection plate 81 disposed below the second mounting bracket 71. A connecting bracket 84 is fixedly installed on one side of the collection plate 81. One end of the connecting bracket 84 is inserted into the side wall of the second mounting bracket 71. A filter screen 85 is detachably installed inside the collection plate 81. One end of the dust collection pipe 82 is connected to the bottom of the collection plate 81. The other end of the dust collection pipe 82 is connected to an exhaust fan 83. The exhaust fan 83 is installed at the bottom of the rotating base 52. When the cleaning brush head 72 cleans impurities, the exhaust fan 83 is activated to start drawing air, so that the impurities cleaned by the cleaning brush head 72 can be drawn into the collection plate 81. At the same time, radioactive dust dispersed in the air can also be drawn away.

[0036] Please see Figure 1 and Figure 2 A signal transceiver controller 9 is installed on the support base 54. The signal transceiver controller 9 is wirelessly connected to the external remote control device. The signal transceiver controller 9 is electrically connected to the geared motor 32, the first electric telescopic rod 4, the second electric telescopic rod 6, and the exhaust fan 83. The geared motor 32 is powered by an external power supply. The first electric telescopic rod 4, the second electric telescopic rod 6, and the exhaust fan 83 are all equipped with built-in batteries. The tool can be controlled remotely to perform cleaning operations, which greatly shortens the exposure time of personnel, liberates the workers from the high radiation environment, effectively reduces radiation hazards, and protects the life and health of the workers. The workers only need to clean and replace the corresponding parts in a short time.

[0037] The working principle of this utility model patent for a special tool for rapid cleaning of the top sealing surface of a nuclear power plant annular vessel is as follows: The main structure of this tool uses a lead alloy or tungsten alloy shielding layer to reduce radiation leakage. Cables and pipelines of electrical components that need to be connected to an external power supply are connected through shielded channels to avoid radioactive contamination. When cleaning of the top sealing surface of the annular vessel is required, a command is sent to the signal transceiver controller 9 via remote control. The signal transceiver controller 9 controls the geared motor 32, the first electric telescopic rod 4, the second electric telescopic rod 6, and the exhaust fan 83 to operate. First, the first electric telescopic rod 4 causes the cleaning brush head 72 to contact the top sealing surface of the annular vessel. Then, the extension and retraction of the second electric telescopic rod 6 allows the cleaning brush head 72 to roll on the top sealing surface of the annular vessel. As the cleaning brush head 72 rolls, it can clean impurities such as oxide scale and grease. During the cleaning process, the exhaust fan 83 starts, and the exhaust fan 83 begins to draw air, allowing the impurities cleaned by the cleaning brush head 72 to be transported to the collection point. Inside plate 81, radioactive dust dispersed in the air can also be extracted. The gear 33 is driven by the reduction motor 32 to rotate, and the gear 33 drives the rotating gear ring 2 to rotate, thereby driving the cleaning brush head 72 to rotate. As the cleaning brush head 72 rotates, its position can be adjusted, allowing cleaning operations to be performed on different locations. After cleaning is completed, the height of the cleaning brush head 72 is lowered by the first electric telescopic rod 4, and then the ratchet 55 is released by moving the pawl 56, so that the first rotating rod 53 can rotate, thereby allowing the second mounting frame 71 and the collection plate 81 to rotate downward, further reducing the height of the second mounting frame 71 and the collection plate 81, making it easier for workers to clean and replace the cleaning brush head 72, the collection plate 81 and the filter screen 85. If impurities inside the collection plate 81 fall to the ground when it rotates, they can be cleaned manually. This method significantly reduces the exposure time of personnel, freeing workers from high-radiation environments, effectively reducing radiation hazards and protecting the life and health of workers.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A special tool for rapid cleaning of the top sealing surface of an annular container in a nuclear power plant, comprising an annular frame (1), characterized in that, The annular frame (1) has an annular groove inside, and a rotating toothed ring (2) is movably connected inside the annular groove. A rotation drive assembly (3) that drives the rotating toothed ring (2) is installed on the annular frame (1). A first electric telescopic rod (4) is installed at the bottom end of the rotating toothed ring (2), and a rotating assembly (5) is installed at the telescopic end of the first electric telescopic rod (4). The rotating assembly (5) includes a first mounting base (51) fixedly installed on the telescopic end of the first electric telescopic rod (4), a rotating seat (52) rotatably connected to the first mounting base (51), and a support seat (54) fixedly installed on the rotating seat (52); A second electric telescopic rod (6) is fixedly installed on one side of the support base (54); The second electric telescopic rod (6) is equipped with a cleaning component (7) at its telescopic end; The cleaning assembly (7) includes a second mounting bracket (71) fixedly installed on the telescopic end of the second electric telescopic rod (6), and a cleaning brush head (72) is detachably installed on the second mounting bracket (71); A vacuuming component (8) is provided below the cleaning component (7).

2. The special tool for rapid cleaning of the top sealing surface of the annular container of a nuclear power plant according to claim 1, characterized in that, The rotation drive assembly (3) includes a motor base (31) fixedly installed on the outer circumferential wall of the annular frame (1). A reduction motor (32) is fixedly installed at the bottom end of the motor base (31). A gear (33) is installed at the output end of the reduction motor (32). The reduction motor (32) meshes with the teeth on the rotating gear ring (2).

3. The special tool for rapid cleaning of the top sealing surface of the annular container of a nuclear power plant according to claim 1, characterized in that, A first rotating rod (53) is fixedly connected through the rotating seat (52). One end of the first rotating rod (53) is inserted into the inner wall of one side of the first mounting seat (51), and the other end is connected through to the other side of the first mounting seat (51), and the other end extends out of the first mounting seat (51).

4. The special tool for rapid cleaning of the top sealing surface of the annular container of a nuclear power plant according to claim 3, characterized in that, A ratchet (55) is fixedly installed on one end of the first rotating rod (53) that extends outside the first mounting base (51). A pawl (56) is also movably installed on the outer wall of the first mounting base (51). The pawl (56) and the ratchet (55) cooperate with each other.

5. The special tool for rapid cleaning of the top sealing surface of the annular container of a nuclear power plant according to claim 1, characterized in that, A pull rod (75) is slidably connected to both sides of the second mounting bracket (71). A limiting seat (74) is fixedly installed at the end of the pull rod (75) inside the second mounting bracket (71). A slot is provided at the end of the limiting seat (74) away from the pull rod (75). A spring (76) is also sleeved on the pull rod (75). The spring (76) is located between the limiting seat (74) and the side wall of the second mounting bracket (71). A handle (77) is fixedly installed at the end of the pull rod (75) outside the second mounting bracket (71). A second rotating rod (73) is connected through the cleaning brush head (72). The two ends of the second rotating rod (73) are respectively inserted into the slots on the two sets of limiting seats (74).

6. The special tool for rapid cleaning of the top sealing surface of the annular container of a nuclear power plant according to claim 2, characterized in that, The dust collection assembly (8) includes a collection plate (81) disposed below the second mounting bracket (71). A connecting bracket (84) is fixedly installed on one side of the collection plate (81). One end of the connecting bracket (84) is inserted into the side wall of the second mounting bracket (71). A filter screen (85) is detachably installed inside the collection plate (81). One end of a dust collection pipe (82) is connected to the bottom end of the collection plate (81). The other end of the dust collection pipe (82) is connected to an exhaust fan (83). The exhaust fan (83) is installed at the bottom end of the rotating base (52).

7. The special tool for rapid cleaning of the top sealing surface of the annular container of a nuclear power plant according to claim 6, characterized in that, A signal transceiver controller (9) is installed on the support base (54). The signal transceiver controller (9) is wirelessly connected to the remote control device of the peripheral device. The signal transceiver controller (9) is electrically connected to the geared motor (32), the first electric telescopic rod (4), the second electric telescopic rod (6) and the exhaust fan (83). The geared motor (32) is powered by an external power supply. The first electric telescopic rod (4), the second electric telescopic rod (6) and the exhaust fan (83) are all equipped with built-in batteries.

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