A reactor pressure vessel bolt hole thread cleaning device

Abstract

The present application relates to reactor pressure vessel bolt hole cleaning technical field, specifically disclose a kind of reactor pressure vessel bolt hole thread cleaning device.The device includes car body part, walking part and cleaning part, the car body frame bottom surface of the car body part is welded with walking wheel;In the walking part, sliding plate is horizontally placed in the middle of car body frame, the left end of the sliding plate is fixedly connected with car body frame, and the right end can slide to left;The head of walking electric cylinder is fixedly connected with car body frame, and tail is connected with the right end of sliding plate;The left end of the sliding plate is provided with walking hole, lifting motor is provided above the walking hole, and the lifting motor is connected with expansion module by lifting linear unit;The cleaning part is located above the right end of sliding plate, can move up and down, and then in-depth bolt hole is cleaned.The device is ingeniously designed, and the structure is reliable, and the cleaning efficiency of circular flange bolt hole is improved.

Description

Technical Field

[0001] This invention belongs to the field of reactor pressure vessel bolt hole cleaning technology, specifically relating to a reactor pressure vessel bolt hole thread cleaning device. Background Technology

[0002] Cleaning the bolt holes of reactor pressure vessels is an essential task during major overhauls. The purpose is to remove residual anti-seize agents and other debris from the bolt holes. Currently, power plants both domestically and internationally widely use bolt hole cleaning machines to clean the main bolt holes on the flange surfaces of pressure vessels.

[0003] Screw hole cleaning machines must travel strictly along an arc-shaped trajectory on the flange face to clean the circumferentially distributed screw holes. Currently, cleaning machines both domestically and internationally use wheels mounted on the outer and inner sides of the vehicle body to mate with the inner and outer arcs of the pressure vessel flange face when traveling on pressure vessel flange faces, ensuring that the cleaning machine travels along the arc-shaped trajectory. Existing cleaning machine traveling structures must ensure that the inner and outer sides of the flange face being traveled on have arc-shaped steps. Since the top cover flange face only has an outer arc and no inner arc, the aforementioned cleaning machines can only perform operations on arc-shaped surfaces and cannot work on round top cover flange faces. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art by providing a reactor pressure vessel bolt hole thread cleaning device to solve the problem of cleaning the bolt holes of the circular top cover flange.

[0005] To solve the above problems, the technical solution of the present invention is as follows: a reactor pressure vessel bolt hole thread cleaning device, the device comprising a vehicle body, a traveling part, and a cleaning part, the vehicle body comprising a vehicle frame and traveling wheels, the traveling wheels being mounted on the bottom surface of the vehicle frame; the traveling part comprising a lifting motor, a lifting linear unit, a tensioning module, a sliding plate, and a traveling electric cylinder, the sliding plate being horizontally positioned in the middle of the vehicle frame, the left end of the sliding plate being fixedly connected to the vehicle frame, and the right end being able to slide to the left, reducing the straight-line distance between the left and right ends; the head of the traveling electric cylinder being fixedly connected to the vehicle frame, and the tail end being connected to the right end of the sliding plate, the right end of the sliding plate being driven by the extension and retraction of the traveling electric cylinder. The sliding plate is positioned to move closer to or further away from the left end. A walking hole is provided at the left end of the sliding plate, and a lifting motor is positioned directly above the walking hole. The lifting motor is connected to a tensioning module via a lifting linear unit. The lifting motor drives the lifting linear unit to move up and down, thereby driving the tensioning module to move up and down. The tensioning module includes a tensioning cylinder, a tensioning block, and a tensioning sleeve, arranged sequentially from top to bottom. The tensioning cylinder is connected to the tensioning block, which moves up and down under the action of the tensioning cylinder. The longitudinal section of the tensioning block is an inverted trapezoidal structure. After the tensioning block descends into the tensioning sleeve, it expands the volume of the tensioning sleeve, causing the tensioning sleeve to tighten within the bolt hole. The cleaning unit includes a polishing component, a cleaning component, a second connecting frame, a cleaning unit linear unit, and a cleaning unit lifting motor. A cleaning hole is provided at the right end of the sliding plate, and a cleaning unit lifting motor is provided above the cleaning hole. The cleaning unit lifting motor is connected to the second connecting frame through the cleaning unit linear unit. A cleaning component is provided at the left end of the second connecting frame, and a polishing component is provided at the left end of the second connecting frame. A tensioning device is provided below the cleaning component, and a tensioning device is provided below the polishing component.

[0006] The bottom of the vehicle frame is provided with an arc guide rail, and the sliding plate moves in a trajectory that matches the distribution circle of the bolt holes of the pressure vessel under the guidance of the arc guide rail.

[0007] The lifting linear unit is connected to the tensioning module via the first connecting frame.

[0008] The walking part includes two tensioning modules, which are located at both ends of the first connecting frame.

[0009] The second connecting frame has a drying component in the middle.

[0010] The significant advantage of this invention lies in its ability to automatically clean the bolt holes of reactor pressure vessels by alternately inserting a tightening device and a cleaning unit into the bolt holes. This ingeniously designed and reliably structured device significantly improves the cleaning efficiency of bolt holes in circular flanges. Attached Figure Description

[0011] Fig. 1 This is a front view of a reactor pressure vessel bolt hole thread cleaning device according to the present invention;

[0012] Fig. 2 This is a top view of a reactor pressure vessel bolt hole thread cleaning device according to the present invention;

[0013] Fig. 3 This is a schematic diagram of the expansion module in a reactor pressure vessel bolt hole thread cleaning device according to the present invention;

[0014] In the diagram: 1. Vehicle frame; 2. Lifting motor; 3. Lifting linear unit; 4. First connecting frame; 5. Tensioning module; 6. Traveling wheel; 7. Polishing assembly; 8. Cleaning assembly; 9. Second connecting frame; 10. Cleaning section linear unit; 11. Cleaning section lifting motor; 12. Sliding plate; 13. Traveling electric cylinder; 14. Arc guide rail; 15. Tensioning cylinder; 16. Tensioning block; 17. Tensioning sleeve. Detailed Implementation

[0015] The technical solutions of the invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of the invention.

[0016] In the description of this invention, it should be noted that the use of terms such as "above" to indicate orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0017] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0019] like Figs. 1-3 As shown, a reactor pressure vessel bolt hole thread cleaning device includes a vehicle body, a traveling section, and a cleaning section.

[0020] The vehicle body includes a vehicle frame 1, wheels 6, and an arc guide rail 14. The horizontal cross section of the vehicle frame 1 is arc-shaped, and the center of the arc is concentric with the top cover of the reactor pressure vessel. The arc guide rail 14 is provided at the bottom of the vehicle frame 1, and the center of the arc guide rail 14 is concentric with the top cover of the reactor pressure vessel. The wheels 6 are installed on the bottom surface of the vehicle frame 1.

[0021] The traveling unit includes a lifting motor 2, a lifting linear unit 3, a first connecting frame 4, a tensioning module 5, a sliding plate 12, and a traveling electric cylinder 13. The sliding plate 12 is horizontally placed in the middle of the vehicle frame 1. The sliding plate 12 is arc-shaped, with its center concentric with the top cover of the reactor pressure vessel. The left end of the sliding plate 12 is fixedly connected to the vehicle frame 1, and the right end can slide to the left to reduce the straight-line distance between the left and right ends. The sliding plate 12 is mounted on an arc-shaped guide rail 14. The head of the traveling electric cylinder 13 is fixedly connected to the vehicle frame 1, and the tail end is connected to the right end of the sliding plate 12. Through the extension and retraction of the traveling electric cylinder 13, the sliding plate 12 is driven to move left and right along the arc-shaped guide rail 14, and the traveling trajectory is adapted to the distribution circle of the pressure vessel bolt holes. A traveling hole is opened at the left end of the sliding plate 12, and the lifting motor 2 is located directly above the traveling hole. The lifting motor 2 is connected to the tensioning module 5 via the lifting linear unit 3. In one embodiment, the traveling part is provided with two tensioning modules 5. The lifting linear unit 3 is connected to the two tensioning modules 5 via the first connecting frame 4. The lifting motor 2 drives the lifting linear unit 3 to move up and down, thereby driving the tensioning modules 5 to move up and down. The tensioning module 5 includes a tensioning cylinder 15, a tensioning block 16, and a tensioning sleeve 17. The tensioning cylinder 15, tensioning block 16, and tensioning sleeve 17 are arranged sequentially from top to bottom. The tensioning cylinder 15 is connected to the tensioning block 16. The tensioning block 16 moves up and down under the action of the tensioning cylinder 15. The longitudinal section of the tensioning block 16 is an inverted trapezoidal structure. After the tensioning block 16 descends into the tensioning sleeve 17, it expands the volume of the tensioning sleeve 17, so that the tensioning sleeve 17 is tightened in the bolt hole.

[0022] The cleaning unit includes a polishing component 7, a cleaning component 8, a second connecting frame 9, a cleaning unit linear unit 10, and a cleaning unit lifting motor 11. A cleaning hole is provided at the right end of the sliding plate 12. The cleaning unit lifting motor 11 is located above the cleaning hole and is connected to the second connecting frame 9 via the cleaning unit linear unit 10. The cleaning component 8 is located at the left end of the second connecting frame 9 to clean the bolt holes, and the polishing component 7 is located at the left end of the second connecting frame 9 to polish the bolt holes. A drying component is also provided in the middle of the second connecting frame 9 to dry the bolt holes. A tensioning device 5 is located below the cleaning component 8 and below the polishing component 7.

[0023] The operation process of this device is as follows:

[0024] The device completes initial positioning on the flange surface. At this time, the traveling electric cylinder 13 is in the retracted state, the traveling tensioning device 5 is inserted into the bolt hole, the tensioning cylinder 15 is in the extended state, and the traveling tensioning device 5 is in the tensioned state within the bolt hole. The cleaning component 8 and the polishing component 7 are respectively placed above the bolt holes to be cleaned. Driven by the lifting motor 11, the cleaning component 8 and the polishing component 7 can be sent into the bolt holes through the linear unit 10 for cleaning. After cleaning, the cleaning tensioning device 5 tightens, the traveling tensioning device 5 loosens, and the lifting motor 2 drives the lifting linear unit 3 to move the two bolt holes... The tensioning device 5 is pulled out of the bolt hole; the traveling electric cylinder 13 extends and drives the two sets of tensioning devices 5 forward by one hole position through the sliding plate 12. Then, the lifting motor 2 drives the lifting linear unit 3 to insert the two sets of tensioning devices 5 into the bolt hole, and the traveling part tensioning device 5 tightens; the cleaning part tensioning device 5 is released, and the cleaning part linear unit 10 pulls the cleaning component 8 and polishing component 7 out of the bolt hole; finally, the traveling electric cylinder 13 retracts. Since the two sets of tensioning devices 5 of the traveling part are tightened in the light hole, the sliding plate 12 is fixed at this time, and the traveling electric cylinder 13 pulls the vehicle body forward by one hole position, and the vehicle body returns to the initial positioning state.

[0025] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for cleaning the threads of bolt holes in a reactor pressure vessel, characterized in that: The device includes a vehicle body, a walking section, and a cleaning section. The vehicle body includes a vehicle frame (1) and walking wheels (6). The walking wheels (6) are installed on the bottom surface of the vehicle frame (1). The walking section includes a lifting motor (2), a lifting linear unit (3), a tensioning module (5), a sliding plate (12), and a walking electric cylinder (13). The sliding plate (12) is horizontally placed in the middle of the vehicle frame (1). The left end of the sliding plate (12) is fixedly connected to the vehicle frame (1), and the right end can slide to the left to reduce the straight-line distance between the left and right ends. The head of the walking electric cylinder (13) is fixedly connected to the vehicle frame (1), and the tail end is fixedly connected to the sliding plate (12). The right end is connected to the sliding plate (12), and the right end of the sliding plate (12) moves closer to or away from the left end by the extension and retraction of the walking electric cylinder (13); the left end of the sliding plate (12) has a walking hole, and a lifting motor (2) is provided directly above the walking hole. The lifting motor (2) is connected to the tensioning module (5) through the lifting linear unit (3). The lifting motor (2) drives the lifting linear unit (3) to move up and down, thereby driving the tensioning module (5) to move up and down; the tensioning module (5) includes a tensioning cylinder (15), a tensioning block (16), and a tensioning sleeve (17). 7) Arranged sequentially from top to bottom, wherein the tensioning cylinder (15) is connected to the tensioning block (16), and the tensioning block (16) moves up and down under the action of the tensioning cylinder (15). The longitudinal section of the tensioning block (16) is an inverted trapezoidal structure. After the tensioning block (16) descends into the tensioning sleeve (17), it expands the volume of the tensioning sleeve (17) so that the tensioning sleeve (17) is tightened in the bolt hole; the cleaning part includes a polishing component (7), a cleaning component (8), a second connecting frame (9), a cleaning part linear unit (10), and a cleaning part lifting motor (11). The right end of the sliding plate (12) is provided with a cleaning hole, and the cleaning hole is provided with a cleaning hole. The unit is equipped with a cleaning section lifting motor (11), which is connected to the second connecting frame (9) through the cleaning section linear unit (10). The second connecting frame (9) has a cleaning component (8) at the left end and a polishing component (7) at the right end. The cleaning component (8) and the polishing component (7) are provided with a tensioning module (5) below the cleaning component (8) and the tensioning module (5) below the polishing component (7). The lifting linear unit (3) is connected to the tensioning module (5) through the first connecting frame (4). The walking part includes two tensioning modules (5), which are located at both ends of the first connecting frame (4).

2. The reactor pressure vessel bolt hole thread cleaning device according to claim 1, characterized in that: The bottom of the vehicle frame (1) is provided with an arc guide rail (14). Under the guidance of the arc guide rail (14), the sliding plate (12) moves in a trajectory that matches the distribution circle of the bolt holes of the pressure vessel.

3. The reactor pressure vessel bolt hole thread cleaning device according to claim 1, characterized in that: The second connecting frame (9) has a drying component in the middle.

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