Electric cutting tool for valve seal welding in high-irradiation narrow space environment

Abstract

The utility model relates to the field of cutting, in particular to an electric cutting tool for sealing welding of a valve in a high-irradiation narrow space environment, which comprises a mounting support, a rotating bracket, a rotating motor and a cutting component, and the mounting support is detachably mounted on a valve flange to be cut; the rotating support is rotationally connected with the mounting support, and the rotating support is provided with insections used for being meshed with the rotating gear; the rotating motor is fixedly connected with the mounting support, and an output shaft of the rotating motor is meshed with the rotating support through a rotating gear in an insection mode. The cutting assembly is connected with the rotating support and provided with a scraper or a cutter. According to the cutting tool provided by the utility model, the detachable mounting support and the rotatable rotating bracket are adopted, so that the cutting tool can be quickly mounted on the valve flange, and the cutting assembly can rotate around the axis of the valve flange, and therefore, the sealing welding seam of the valve can be circumferentially cut.

Description

Technical Field

[0001] This utility model relates to the field of cutting, specifically to an electric cutting tool for valve sealing welding in a high-irradiation, confined space environment. Background Technology

[0002] In high-radiation environments such as nuclear power plants and nuclear fuel reprocessing plants, the inspection, replacement, and maintenance of valves is a critical and challenging task. These valves are typically used to transport radioactive fluids, therefore, a high degree of sealing must be ensured during cutting operations to prevent the leakage of radioactive materials. Furthermore, due to the limitations imposed on manual operation in high-radiation environments, remotely controlled automated or semi-automated equipment is usually required for valve cutting.

[0003] Traditional valve cutting methods, such as mechanical cutting, flame cutting, and plasma cutting, have limitations when applied to cutting sealed valves in high-irradiation environments. For example, it's difficult to guarantee cutting precision, making subsequent welding and other operations challenging; the cutting process may generate a large amount of debris or slag, increasing the risk of radioactive contamination; and complex operation and control are required, making remote automation difficult. Furthermore, high-irradiation environments place special demands on the materials and structure of cutting equipment to ensure its reliability and service life under irradiation conditions.

[0004] Therefore, it is of great significance to develop a tool that can perform high-precision, sealing cuts on valve sealing welds in high-irradiation environments. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the valve sealing weld cutting tools in the prior art are difficult to perform high-precision, sealed, and automated cutting of valve sealing welds in high-irradiation environments, and have problems such as complex operation and easy generation of radioactive pollution. The purpose is to provide an electric valve sealing weld cutting tool for high-irradiation, narrow space environments, which realizes efficient, accurate, and sealed automated cutting of valve sealing welds, reduces the risk of radioactive pollution, and improves the efficiency and safety of valve maintenance and replacement in high-irradiation environments.

[0006] This utility model is achieved through the following technical solution:

[0007] An electric cutting tool for valve sealing welding in high-irradiation, confined spaces includes:

[0008] Mounting support, which is detachably mounted to the valve flange to be cut;

[0009] A rotating bracket is rotatably connected to the mounting support, and the rotation axis of the rotating bracket coincides with the axis of the valve stem. The rotating bracket is provided with teeth for meshing with a rotating gear.

[0010] A rotary motor is fixedly connected to the mounting bracket, and the output shaft of the rotary motor meshes with the teeth of the rotary bracket through the rotary gear, thereby driving the rotary bracket to rotate.

[0011] A cutting assembly connected to the rotating support, the cutting assembly being equipped with a scraper or a cutter;

[0012] When the cutting assembly is configured as a scraper, it is used to remove the protective layer or protrusion of the weld to be cut; when the cutting assembly is configured as a cutter, it is used to cut off the weld to be cut.

[0013] Specifically, the valve stem coincides with the central axis of the mounting support, and the valve stem is fixedly connected to the valve flange;

[0014] The rotating support includes a rotating ring and a gantry. The gantry is rotatably connected to the valve stem, and both ends of the gantry are connected to the rotating ring. The cutting assembly is connected to the rotating ring of the rotating support through a lifting assembly.

[0015] Specifically, the lifting assembly includes a lifting slide and a lifting screw. The lifting slide is fixedly connected to the rotating ring. The cutting assembly is slidably connected to the lifting slide and the sliding direction is parallel to the axis of the valve flange. The lifting screw is connected to the rotating bracket through a through hole, and the lower end of the lifting screw is rotatably connected to the cutting assembly by a threaded pair.

[0016] Optionally, when the cutting component is configured with a scraper, it is set as a scraper component; when the cutting component is configured as a cutter, it is set as a cutter component.

[0017] The cutter assembly and the scraper assembly are respectively located on both sides of the valve.

[0018] Specifically, the cutting assembly includes:

[0019] A radial support is connected to the rotary support, and the radial support is provided with a tool holder groove, the sliding direction of which is along the radial direction of the valve flange;

[0020] A blade holder is disposed in the blade holder groove. The front end of the blade holder is provided with a mounting part for mounting a scraper or a cutter, and the rear end of the blade holder is provided with a threaded hole.

[0021] A radial screw, which is rotatably connected to the radial support via a bearing assembly, and the front end of the radial screw is threadedly connected to the threaded hole of the tool holder;

[0022] A cutting motor is fixedly connected to the radial support, and the output end of the cutting motor is connected to the radial screw through a gear set, driving the radial screw to rotate.

[0023] Specifically, the radial support has an L-shaped structure, including a vertical plate and a horizontal plate. The upper end of the vertical plate is connected to the rotating support. The tool holder slide groove is provided on the side of the horizontal plate and is closed by a cover plate connected to the horizontal plate. The cover plate or the horizontal plate is provided with an adjusting strip for adjusting the tool holder.

[0024] Furthermore, the cutting tool also includes a vision component, which is fixedly connected to the cutting component and is disposed on one side of the cutter.

[0025] Specifically, the vision component includes: a camera bracket, a sensor bracket, a camera, and a distance sensor. The camera is fixedly connected to the cutting component via the camera bracket and is used to capture images of the weld seam. The distance sensor is fixedly connected to the cutting component via the sensor bracket and is used to measure the distance between the cutting component and the outer wall of the valve.

[0026] Furthermore, the cutting tool also includes a slip ring, which includes a fixed part and a rotating part. The slip ring is disposed at the connection between the mounting support and the rotating bracket. The fixed part is fixedly connected to the valve stem of the mounting support, and the rotating part is fixedly connected to the gantry of the rotating bracket. The power supply cable of the cutting assembly is connected to an external power source through the slip ring.

[0027] Specifically, the valve flange is connected to the upper surface of the valve flange by flange bolts.

[0028] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0029] The cutting tool provided by this utility model, by employing a detachable mounting bracket and a rotatable rotating support, enables rapid installation of the cutting tool on the valve and rotational movement of the cutting assembly around the valve axis, thereby enabling circumferential cutting of the valve sealing weld. The cutting assembly is driven to move axially along the valve flange by a lifting assembly, achieving control of the cutting position. The cutting motor and radial screw of the cutting assembly allow the cutter or scraper to move radially along the valve flange, achieving precise control of the cutting depth, thus ensuring cutting quality and avoiding over-cutting or under-cutting. Attached Figure Description

[0030] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0031] Figure 1 This is a structural schematic diagram of an electric cutting tool for valve sealing welding in a high-irradiation, confined space environment, according to the present invention.

[0032] Figure 2 This is a cross-sectional view of an electric cutting tool for valve sealing welding in a high-irradiation, confined space environment, as described in this utility model.

[0033] Figure 3 This is a structural schematic diagram of the cutting assembly according to the present invention.

[0034] Reference numerals: 1-Mounting support, 2-Rotating bracket, 3-Rotating motor, 4-Cutting assembly, 5-Lifting assembly, 6-Vision assembly, 7-Slip ring, 11-Valve flange, 12-Valve stem, 21-Toothed teeth, 22-Gantry, 51-Lifting screw, 52-Lifting slide, 61-Distance sensor, 62-Camera, 41-Radial bracket, 42-Tool holder, 43-Radial screw, 44-Bearing assembly, 45-Gear assembly, 46-Cutting motor. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0036] It should also be noted that, for ease of description, only the parts relevant to this utility model are shown in the accompanying drawings.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Where there is no conflict, the embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example 1

[0041] like Figure 1 , Figure 2 As shown, an electric cutting tool for valve sealing welds in a high-irradiation, confined space environment is provided, which is mainly used for cutting the weld seams of valves in a high-irradiation environment. The tool includes: a mounting base, a rotating bracket 2, a rotating motor 3, and a cutting assembly 4.

[0042] Mounting support 1 can be detachably installed onto the valve flange to be cut.

[0043] The rotating bracket 2 is rotatably connected to the mounting support, and the rotation axis of the rotating bracket 2 coincides with the axis of the valve stem 12. The rotating bracket 2 is provided with teeth 21 for meshing with the rotating gear; it can rotate around the valve flange axis, driving the cutting assembly 4 to perform a cutting motion around the valve flange.

[0044] The rotary motor 3 is fixedly connected to the mounting bracket 1, and the output shaft of the rotary motor 3 meshes with the toothed 21 of the rotary bracket 2 through a rotary gear, so as to transmit the power of the rotary motor 3 to the rotary bracket 2 and drive the rotary bracket 2 to rotate.

[0045] The cutting assembly 4 is connected to the rotating bracket 2 and serves as the component for performing the cutting operation. It can be configured with a scraper or a cutter as needed.

[0046] When the cutting component 4 is configured as a scraper, it is used to remove the protective layer (such as paint, coating, etc.) or protrusions (such as weld slag, spatter, etc.) of the weld to be cut; when the cutting component 4 is configured as a cutter, it is used to cut off the weld to be cut.

[0047] In this embodiment, during installation, apply an appropriate amount of grease to all contact surfaces and thoroughly clean and wash all components. Parts must be thoroughly cleaned and washed before assembly, and must be free of burrs, flash, scale, rust, chips, oil, colorants, and dust. When tightening screws and bolts, it is strictly forbidden to strike them or use unsuitable screwdrivers and wrenches. After tightening, the screw slots, screw heads, and bolt heads must not be damaged.

[0048] Place the mounting bracket 1 on the valve flange to be cut, and securely fix the mounting bracket 1 to the valve flange using a suitable fixing method (such as bolting the flange or using a special clamp). Ensure that the axis of the mounting bracket 1 coincides with the axis of the valve stem.

[0049] Connect the rotating bracket 2 to the mounting bracket 1 to ensure that the rotating bracket 2 can rotate freely around the valve stem 12 of the mounting bracket 1, while ensuring that the rotating gear on the output shaft of the rotating motor 3 meshes correctly with the toothed teeth 21 on the rotating bracket 2.

[0050] The pre-assembled cutting assembly 4 (including radial support 41, blade holder 42 slide, blade holder 42, radial screw 43, cutting motor 46, scraper and cutter, etc.) is quickly installed onto the rotating support 2.

[0051] Tighten all bolts and screws with appropriate tools according to the specified torque and sequence, ensuring that all parts are securely connected and without loosening.

[0052] Example 2

[0053] The valve stem 12 is fixedly connected to the valve flange 11 and coincides with the axis of the mounting support; the valve flange 11 is usually a circular or other shaped plate structure, used to connect to the end of the mounting support. The valve stem 12 is usually cylindrical, vertically fixedly connected to the valve flange 11, serving to support the rotating bracket 2 and acting as the rotation center of the rotating bracket 2.

[0054] The rotating support 2 includes a rotating ring and a gantry 22. The gantry 22 is rotatably connected to the valve stem 12, and both ends of the gantry 22 are connected to the rotating ring. The cutting assembly 4 is connected to the rotating ring of the rotating support 2 via the lifting assembly 5. The rotating ring surrounds the valve stem 12 and can rotate around the valve stem 12. The gantry 22 spans both sides of the valve stem 12, and both ends are connected to the rotating ring, serving as a support and connection.

[0055] The lifting assembly 5 includes a lifting slide 52 and a lifting screw 51. The lifting slide 52 is fixedly connected to the rotating ring. The cutting assembly 4 is slidably connected to the lifting slide 52 and the sliding direction is parallel to the axis of the valve flange. The lifting screw 51 is connected to the rotating ring through a through hole, and the lower end of the lifting screw 51 is rotatably connected to the cutting assembly 4 through a threaded pair.

[0056] The lifting assembly 5 is used to adjust the height of the cutting assembly 4, enabling the cutting assembly 4 to move axially along the valve flange. The lifting slide 52 provides a sliding guide rail, limiting the direction of movement of the cutting assembly 4, and the threaded pair can convert the rotational motion of the lifting screw 51 into the linear motion of the cutting assembly 4.

[0057] Valve flange 11 is connected to the upper surface of valve flange by flange bolts.

[0058] Example 3

[0059] like Figure 3 As shown, when the cutting component 4 is equipped with a scraper, it is set as a scraper component, mainly used to remove the protective layer or protrusions on the weld surface.

[0060] When the cutting component 4 is configured as a cutter, it is set as a cutter component and is mainly used to remove weld metal.

[0061] In typical applications, both scraper and cutter assemblies are required. Therefore, in this embodiment, the cutter and scraper assemblies are respectively located on both sides of the valve flange. The symmetrical arrangement of the two cutting assemblies 4 can maintain the balance of the entire cutting tool and improve cutting stability. During use, the scraper assembly is used to clean the weld surface first, and then the cutter assembly is used for cutting. The space on both sides of the rotating bracket 2 is fully utilized by rotation.

[0062] The cutting assembly 4 includes: a radial support 41, a blade holder 42, a radial screw 43, and a cutting motor 46.

[0063] The radial support 41 is connected to the rotary support 2. The radial support 41 is provided with a tool holder 42 slide groove, and the sliding direction of the tool holder 42 slide groove is along the radial direction of the valve flange. That is, the tool holder 42 can move forward and backward along the radial direction of the valve flange. At the same time, the tool holder 42 slide groove provides a sliding guide for the tool holder 42, which restricts the movement direction of the tool holder 42.

[0064] The blade holder 42 is disposed in the slide groove of the blade holder 42. The front end of the blade holder 42 is provided with a mounting part for mounting a scraper or a cutter, and the rear end of the blade holder 42 is provided with a threaded hole.

[0065] The radial screw 43 is rotatably connected to the radial support 41 through the bearing assembly 44. The front end of the radial screw 43 is threadedly connected to the threaded hole of the tool holder 42. Through the threaded connection with the tool holder 42, its own rotational motion is converted into the linear motion (radial advance and retreat) of the tool holder 42.

[0066] The cutting motor 46 is fixedly connected to the radial support 41, and the output end of the cutting motor 46 is connected to the radial screw 43 through the gear set 45, and drives the radial screw 43 to rotate, indirectly controlling the forward and backward movement of the tool holder 42.

[0067] The radial support 41 has an L-shaped structure and includes a vertical plate and a horizontal plate. The upper end of the vertical plate is connected to the rotating support 2. The slide groove of the tool holder 42 is set on the side of the horizontal plate and is closed by a cover plate connected to the horizontal plate. The tool holder 42 can be easily replaced and maintained by the detachable cover plate.

[0068] The cover plate or cross plate is provided with an adjusting strip for adjusting the tool holder 42. The adjusting strip is usually used to adjust the gap between the tool holder 42 and the slide, compensate for wear, or limit the abnormal movement of the tool holder 42.

[0069] Example 4

[0070] The cutting tool also includes a vision component 6, which is fixedly connected to the cutting component 4 and is located on one side of the cutter.

[0071] The vision component 6 includes: a camera bracket, a sensor bracket, a camera 62, and a distance sensor 61. The camera 62 is fixedly connected to the cutting component 4 via the camera bracket and is used to capture images of the weld. The distance sensor 61 is fixedly connected to the cutting component 4 via the sensor bracket and is used to measure the distance between the cutting component 4 and the outer wall of the valve flange.

[0072] Camera 62 is used to capture images of the weld and monitor its positioning, alignment, and cutting process. Distance sensor 61 is used to measure the distance between the cutting assembly 4 and the outer wall of the valve flange to control the cutting depth and prevent collisions.

[0073] To facilitate monitoring and adjustment of the cutter, camera 62 is positioned in front of the cutter's cutting direction.

[0074] The cutting tool also includes a slip ring 7, which includes a fixed part and a rotating part. The slip ring 7 is located at the connection between the mounting support and the rotating bracket 2. The fixed part is fixedly connected to the valve stem 12, and the rotating part is fixedly connected to the gantry 22. The power supply cable of the cutting assembly 4 is connected to an external power source through the slip ring 7.

[0075] The main function of slip ring 7 is to establish an electrical connection between the rotating components (rotating bracket 2, cutting assembly 4, vision assembly 6) and the fixed components (mounting support 1) to enable the transmission of power and signals. In this example, slip ring 7 is used to provide power to the cutting assembly 4 and may also provide power and signal transmission to the vision assembly 6.

[0076] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. An electric cutting tool for valve sealing welding in a high-irradiation, confined space environment, characterized in that, include: Mounting support (1), which is detachably mounted to the valve flange (11) to be cut; A rotating bracket (2) is rotatably connected to the mounting bracket (1), and the rotation axis of the rotating bracket (2) coincides with the axis of the valve stem (12). The rotating bracket (2) is provided with teeth (21) for meshing with the rotating gear. A rotary motor (3) is fixedly connected to the mounting bracket (1), and the output shaft of the rotary motor (3) meshes with the toothed teeth (21) of the rotary bracket (2) through the rotary gear, and drives the rotary bracket (2) to rotate. A cutting assembly (4) is connected to the rotating bracket (2), and the cutting assembly (4) is equipped with a scraper or a cutter; When the cutting component (4) is configured as a scraper, it is used to remove the protective layer or protrusion of the weld to be cut; when the cutting component (4) is configured as a cutter, it is used to cut off the weld to be cut.

2. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 1, characterized in that, The central axis of the mounting support (1) coincides with the valve stem (12), and the valve stem (12) is fixedly connected to the valve flange (11); The rotating support (2) includes a rotating ring and a gantry (22). The gantry (22) is connected to the valve stem (12). Both ends of the gantry (22) are connected to the rotating ring. The cutting assembly (4) is connected to the rotating ring of the rotating support (2) through the lifting assembly (5).

3. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 2, characterized in that, The lifting assembly (5) includes a lifting slide (52) and a lifting screw (51). The lifting slide (52) is fixedly connected to the rotating ring. The cutting assembly (4) is slidably connected to the lifting slide (52) and the sliding direction is parallel to the axis of the valve flange. The lifting screw (51) is connected to the rotating bracket (2) through a through hole, and the lower end of the lifting screw (51) is rotatably connected to the cutting assembly (4) through a threaded pair.

4. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 1, characterized in that, When the cutting component (4) is configured with a scraper, it is set as a scraper component; when the cutting component (4) is configured as a cutter, it is set as a cutter component. The cutter assembly and the scraper assembly are respectively located on both sides of the valve.

5. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 1, characterized in that, The cutting component (4) includes: A radial support (41) is connected to the rotating support (2). The radial support (41) is provided with a tool holder (42) groove, and the sliding direction of the tool holder (42) groove is along the radial direction of the valve flange. A blade holder (42) is provided in the groove of the blade holder (42). The front end of the blade holder (42) is provided with a mounting part for mounting a scraper or a cutter, and the rear end of the blade holder (42) is provided with a threaded hole. A radial screw (43) is rotatably connected to the radial support (41) via a bearing assembly (44), and the front end of the radial screw (43) is threadedly connected to the threaded hole of the tool holder (42). A cutting motor (46) is fixedly connected to the radial bracket (41), and the output end of the cutting motor (46) is connected to the radial screw (43) through a gear set (45) and drives the radial screw (43) to rotate.

6. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 5, characterized in that, The radial support (41) has an L-shaped structure. The radial support (41) includes a vertical plate and a horizontal plate. The upper end of the vertical plate is connected to the rotating support (2). The tool holder (42) slide groove is provided on the side of the horizontal plate. The tool holder (42) slide groove is closed by a cover plate connected to the horizontal plate. The cover plate or the horizontal plate is provided with an adjusting strip for adjusting the tool holder (42).

7. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 1, characterized in that, Also includes: A vision component (6) is fixedly connected to the cutting component (4), and the vision component (6) is disposed on one side of the cutter.

8. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 7, characterized in that, The vision component (6) includes: a camera bracket, a sensor bracket, a camera (62) and a distance sensor (61). The camera (62) is fixedly connected to the cutting component (4) through the camera bracket. The camera (62) is used to capture images of the weld seam. The distance sensor (61) is fixedly connected to the cutting component (4) through the sensor bracket. The distance sensor (61) is used to measure the distance between the cutting component (4) and the outer wall of the valve.

9. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 2, characterized in that, It also includes a slip ring (7), which includes a fixed part and a rotating part. The slip ring (7) is located at the connection between the mounting bracket (1) and the rotating bracket (2). The fixed part is fixedly connected to the valve stem (12), and the rotating part is fixedly connected to the gantry (22). The power supply cable of the cutting assembly (4) is connected to an external power source through the slip ring (7).

10. The electric cutting tool for valve sealing welding in a high-irradiation, confined space environment according to claim 2, characterized in that, The valve flange (11) is connected to the upper surface of the valve flange by flange bolts.

Images