Self-adaptive polishing mechanism for pipeline inner wall anti-corrosion surface treatment tool

Abstract

The utility model discloses a self-adaptive polishing mechanism for a pipeline inner wall anti-corrosion surface treatment tool. The self-adaptive polishing mechanism comprises a base, a driver, a guide assembly, an elastic piece, a connecting assembly and a polishing assembly. According to the self-adaptive grinding mechanism, the driver is used for driving the connecting assembly to move on the guide assembly, so that the grinding assembly can move in the pipeline and can grind the inner wall of the pipeline, the elastic piece is arranged, elastic deformation is achieved within a certain range through the elastic piece, and the elastic piece is always in a compressed state during working; the elastic piece is used for counteracting distance changes between different positions of the wall face of the inner wall and the connecting assembly in the grinding process, when the distance between the wall face and the connecting assembly is increased, the compression amount of the elastic piece is reduced, the grinding assembly makes contact with the wall face, and when the distance between the wall face and the connecting assembly is reduced, the compression amount of the elastic piece is increased. And by arranging the elastic piece, the change of the distance between the wall surface and the connecting assembly can be automatically adapted within a certain range.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of nuclear power plant anticorrosion construction, especially to a self-adaptive polishing mechanism for pipeline inner wall anticorrosion surface treatment frock. BACKGROUND

[0002] At present, in the anticorrosion construction site of nuclear power plant, the conventional method is to polish manually by hand holding a polisher, for the pipeline with small diameter, a lengthened polisher or a lengthened rod is used to lengthen the ordinary polisher for polishing. The existing processing mode has the following problems: 1. the lengthened polisher or the lengthened rod is used to lengthen the ordinary polisher for polishing, the distal end is poor in flexibility due to the large weight of the polisher, cannot accurately position the specific polishing position, and it is difficult to achieve overall uniform polishing, and the surface treatment quality is poor; 2. only a certain length of pipeline can be achieved, when the pipeline length is further increased, accessibility cannot be achieved.

[0003] However, in the anticorrosion polishing process, the original pipeline is not completely circular, the pipeline inner wall anticorrosion surface treatment frock cannot be completely centered in the horizontal pipeline due to the self-weight, and the uneven thickness of the pipeline inner wall anticorrosion layer, corrosion pits and the like make that the simple fixed state of the circumferential movement cannot achieve normal polishing, when the feed rate is small, the polishing piece may not touch some areas and cannot achieve polishing, when the feed rate is large, some areas may be blocked due to the collision, and polishing cannot be achieved. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a self-adaptive polishing mechanism for pipeline inner wall anticorrosion surface treatment frock.

[0005] The utility model adopts the technical scheme in the technical solution: a self-adaptive polishing mechanism for pipeline inner wall anticorrosion surface treatment frock is constructed, which comprises a base, a driver, a guide assembly, an elastic member, a connecting assembly and a polishing assembly;

[0006] The driver and the guide assembly are both installed on the base, the connecting assembly is movably connected with the guide assembly, and the driver is connected with the connecting assembly and is used to drive the connecting assembly to move on the guide assembly;

[0007] The polishing assembly is installed on the connecting assembly and is used to polish the pipeline inner wall;

[0008] The elastic member is installed on the connecting assembly and is used to provide elastic force for the polishing assembly.

[0009] In some embodiments, the guide assembly comprises a sliding rail installed on the base and a sliding block movably connected with the sliding rail.

[0010] In some embodiments, the connecting assembly comprises a positioning seat, a retaining block, a connecting plate, a fastening block, a limiting block and a connecting rod.

[0011] The positioning seat is mounted on the sliding block and connected with the output end of the driver.

[0012] The fastening block and the limiting block are separately mounted at two ends of the positioning seat, and the retaining block is located between the fastening block and the limiting block.

[0013] The connecting rod is connected with the fastening block and the limiting block at two ends thereof, respectively, and the connecting rod penetrates through the retaining block, and the retaining block can move back and forth along the axial direction of the connecting rod.

[0014] The connecting plate is connected with the retaining block.

[0015] In some embodiments, the elastic member is sleeved on the outer periphery of the connecting rod, the first end of the elastic member abuts against the fastening block, and the second end of the elastic member abuts against the retaining block.

[0016] In some embodiments, the number of the elastic member and the connecting rod is two.

[0017] In some embodiments, the polishing assembly comprises a first polishing body mounted on the connecting plate and a polishing disc connected with the first polishing body.

[0018] In some embodiments, the connecting assembly comprises a fixing seat mounted on the sliding block, a transition seat mounted on the fixing seat and a mounting seat, and the mounting seat is hinged with the transition seat through a rotating shaft.

[0019] In some embodiments, the first end of the elastic member is connected with the fixing seat, and the second end of the elastic member is connected with the mounting seat.

[0020] In some embodiments, the polishing assembly comprises a second polishing body mounted on the mounting seat and a polishing head connected with the second polishing body.

[0021] In some embodiments, the driver is an electric driver, a hydraulic driver or a pneumatic driver.

[0022] The self-adapting polishing mechanism for the anticorrosion surface treatment tool of the inner wall of a pipeline has the following beneficial effects: the driving device drives the connecting assembly to move on the guiding assembly, so that the polishing assembly can move in the pipeline, and the polishing assembly can polish the inner wall of the pipeline; the elastic member is arranged to realize elastic deformation within a certain range, and the elastic member is always in a compressed state during work; the elastic member is used to offset the distance change between different positions of the inner wall and the connecting assembly during polishing; when the distance between the inner wall and the connecting assembly increases, the compression amount of the elastic member decreases, and the polishing assembly touches the inner wall; when the distance between the inner wall and the connecting assembly decreases, the compression amount of the elastic member increases. Through the arrangement of the elastic member, the distance change between the inner wall and the connecting assembly within a certain range can be automatically adapted. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the present application, the present application will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of a first embodiment of a self-adapting polishing mechanism for an anticorrosion surface treatment tool of the inner wall of a pipeline in some embodiments of the present application;

[0025] Figure 2 is an exploded schematic diagram of the parts of the first embodiment of the self-adapting polishing mechanism for the anticorrosion surface treatment tool of the inner wall of a pipeline in some embodiments of the present application;

[0026] Figure 3 is a schematic diagram of the overall application of the first embodiment of the self-adapting polishing mechanism for the anticorrosion surface treatment tool of the inner wall of a pipeline in some embodiments of the present application;

[0027] Figure 4 is a schematic diagram of the overall structure of a second embodiment of a self-adapting polishing mechanism for an anticorrosion surface treatment tool of the inner wall of a pipeline in some embodiments of the present application;

[0028] Figure 5 is an exploded schematic diagram of the parts of the second embodiment of the self-adapting polishing mechanism for the anticorrosion surface treatment tool of the inner wall of a pipeline in some embodiments of the present application. DETAILED DESCRIPTION

[0029] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0030] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" 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 mechanical connection or an electrical connection; 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. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] Please see Figures 1 to 5 This invention relates to an adaptive grinding mechanism for surface treatment of pipe inner walls for corrosion protection, as described in some embodiments of the present invention. The mechanism includes a base 1, a driver 2, a guide assembly 3, an elastic element 4, a connecting assembly 5, and a grinding assembly 6. The driver 2 and guide assembly 3 are both mounted on the base 1. The connecting assembly 5 is movably connected to the guide assembly 3. The driver 2 is connected to the connecting assembly 5 and drives the connecting assembly 5 to move on the guide assembly 3. The grinding assembly 6 is mounted on the connecting assembly 5 and used to grind the inner wall of the pipe. The elastic element 4 is mounted on the connecting assembly 5 and provides elastic force to the grinding assembly 6. Preferably, the elastic element 4 is a spring. To minimize the change in clamping force, a spring with a small elastic coefficient is preferred, so that the clamping force changes less when the distance between the wall and the connecting assembly 5 changes in the pre-compressed state.

[0032] Cooling water transport process pipelines draw water from pools, concrete culverts, etc., and typically use a pre-embedded section of flanged steel pipe as the interface with the process pipeline. This section of pipe often uses coatings or rubber linings for internal corrosion protection. As the service life increases, these internal corrosion protection measures gradually age and degrade, losing their anti-corrosion function and requiring re-corrosion treatment. Replacing pre-embedded pipelines is technically difficult and costly. On-site surface treatment of the original pipeline inner wall to remove the original anti-corrosion layer and reapply a new one is more cost-effective. However, surface treatment of the original pipeline inner wall is the most difficult part of on-site corrosion protection and a significant factor affecting the quality of corrosion protection, especially for small-diameter pipes where personnel cannot enter the pipe for surface treatment. To achieve on-site surface treatment of the pipeline inner wall, the conventional practice is to manually grind with a handheld grinder. For smaller diameter pipes, extended grinders or grinders with extension poles are used. This method has poor operational flexibility, requires continuous manual operation, is physically demanding, has a poor working environment, and poses a safety risk to the workers. During the anti-corrosion grinding process, the original pipe may not be perfectly circular. Due to its own weight, the anti-corrosion surface treatment tool for the inner wall of the pipe cannot be perfectly centered in the horizontal pipe. At the same time, the uneven thickness of the anti-corrosion layer on the inner wall of the pipe and corrosion pits make it impossible to achieve normal grinding with a simple fixed circular motion. If the feed rate is too small, some areas may not be touched by the grinding disc and cannot be ground. If the feed rate is too large, some areas may be blocked due to friction and cannot be ground.

[0033] To address the aforementioned issues, in this embodiment, the adaptive grinding mechanism utilizes the driver 2 to drive the connecting assembly 5 to move on the guide assembly 3, enabling the grinding assembly 6 to move within the pipe and grind the inner wall of the pipe. An elastic element 4 is incorporated, allowing for elastic deformation within a certain range. During operation, the elastic element 4 is always in a compressed state. This elastic element 4 counteracts changes in the distance between the inner wall surface and the connecting assembly 5 at different locations during grinding. When the distance between the wall surface and the connecting assembly 5 increases, the compression of the elastic element 4 decreases, allowing the grinding assembly 6 to contact the wall surface. Conversely, when the distance decreases, the compression of the elastic element 4 increases. By incorporating the elastic element 4, the mechanism can automatically adapt to changes in the distance between the wall surface and the connecting assembly 5 within a certain range. This elastic element 4 can be a compression spring.

[0034] The driver 2 can be an electric driver, a hydraulic driver, or a pneumatic driver, which can be adjusted according to the actual situation. In this embodiment, the driver 2 is preferably an electric driver, and more specifically, the driver 2 is a stepper motor. A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacements. For each input pulse signal, the rotor of the stepper motor rotates by an angle or moves forward one step. The output angular or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency. The working principle of a stepper motor is based on electromagnetic principles, converting electrical energy into mechanical energy. Its basic structure includes a stator and a rotor. Electromagnetic torque is generated through the principle of electromagnets, thereby achieving rotational or linear motion. It can achieve precise positioning and speed regulation to ensure that the pipe-climbing walking mechanism can move stably on the inner wall of the pipe.

[0035] The guide assembly 3 includes a slide rail 31 mounted on the base 1 and a slider 32 movably connected to the slide rail 31. In this embodiment, to accommodate space constraints, the connection and arrangement of the connecting assembly 5, guide assembly 3, elastic element 4, and grinding assembly 6 are divided into two types. When space is sufficient, the elastic element 4 can be along the pipe diameter direction, and the grinding assembly 6 can slide in a straight line. When space is insufficient, the grinding assembly 6 can use the rotating shaft 504 to change the deformation along the pipe diameter direction to other directions, and the elastic element 4 can change its orientation.

[0036] like Figures 1 to 3 As shown, the first structural form of the adaptive grinding mechanism is as follows: the connecting assembly 5 includes a positioning seat 51, a retaining block 52, a connecting plate 53, a fastening block 54, a limiting block 55, and a connecting rod 56. The positioning seat 51 is mounted on the slider 32 and connected to the output end of the driver 2; the fastening block 54 and the limiting block 55 are separately mounted at both ends of the positioning seat 51, and the retaining block 52 is located between the fastening block 54 and the limiting block 55. The two ends of the connecting rod 56 are respectively connected to the fastening block 54 and the limiting block 55, and the connecting rod 56 passes through the retaining block 52, allowing the retaining block 52 to move back and forth along the axial direction of the connecting rod 56. The connecting plate 53 is connected to the retaining block 52. The elastic element 4 is sleeved on the outer periphery of the connecting rod 56, with the first end of the elastic element 4 abutting against the fastening block 54 and the second end of the elastic element 4 abutting against the retaining block 52. In addition, there are two elastic elements 4 and two connecting rods 56. The grinding assembly 6 includes a first grinding body 61 mounted on the connecting plate 53 and a grinding disc 62 connected to the grinding body. The base 1 is rectangular.

[0037] Specifically, the positioning seat 51 can be bolted to the slider 32. The fastening block 54 and the limiting block 55 can both be bolted to the positioning seat 51. The positioning seat 51 is a rectangular plate, and the fastening block 54 and the limiting block 55 are rectangular blocks. The fastening block 54 and the limiting block 55 together are used to fix the position of the connecting rod 56. The first grinding body 61 can be an electric grinder, which, in conjunction with the grinding disc 62, can perform deburring, grinding, polishing, metal grinding and cutting, rust removal, and other operations on the inner wall of the pipe.

[0038] In the first structural form of the adaptive grinding mechanism, the grinding component 6 can slide along a straight line, and the elastic element 4 is along the pipe diameter direction. This can be applied when there is sufficient space inside the pipe.

[0039] like Figure 4 and Figure 5 As shown, the second structural form of the adaptive grinding mechanism is as follows: the connecting assembly 5 includes a fixed seat 501 mounted on the slider 32, a transition seat 502 mounted on the fixed seat 501, and a mounting seat 503. The mounting seat 503 is hinged to the transition seat 502 via a rotating shaft 504, and the mounting seat 503 is L-shaped. The first end of the elastic member 4 is connected to the fixed seat 501, and the second end of the elastic member 4 is connected to the mounting seat 503. The elastic member 4 is in a compressed state. The grinding assembly 6 includes a second grinding body 63 mounted on the mounting seat 503 and a grinding head 64 connected to the second grinding body 63. The base 1 is circular.

[0040] Specifically, the fixed seat 501 can be connected to the slider 32 by bolts, and the transition seat 502 can be connected to the fixed seat 501 by bolts. The mounting seat 503 is specifically L-shaped, with its bottom connected to the first end of the elastic member 4, and its side wall connected to the second grinding body 63. The second grinding body 63 can be an electric grinder, which can work with the grinding head 64 to perform deburring, grinding, polishing, metal grinding and cutting, rust removal, and other operations on the inner wall of the pipe.

[0041] In the second structural form of the adaptive grinding mechanism, an L-shaped mounting base 503 is used in conjunction with a rotating shaft 504 to change the orientation of the elastic element 4, thereby reducing space requirements and adapting to pipes in smaller spaces.

[0042] In summary, this adaptive grinding mechanism automatically adapts to changes in the distance between the pipe surface and the connecting component 5 within a certain range by setting an elastic element 4 on the connecting component 5. It also uses connecting components 5 with different shapes and structural forms, which can change the direction of the elastic element 4 according to the actual site conditions, make reasonable use of space, and adapt to pipes of different sizes.

[0043] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. An adaptive grinding mechanism for a tooling fixture used for anti-corrosion surface treatment of pipe inner walls, characterized in that, It includes a base (1), a driver (2), a guide assembly (3), an elastic element (4), a connecting assembly (5), and a polishing assembly (6); The driver (2) and the guide assembly (3) are both mounted on the base (1). The connecting assembly (5) is movably connected to the guide assembly (3). The driver (2) is connected to the connecting assembly (5) and is used to drive the connecting assembly (5) to move on the guide assembly (3). The grinding assembly (6) is mounted on the connecting assembly (5) and is used to grind the inner wall of the pipe; The elastic element (4) is mounted on the connecting assembly (5) and is used to provide elastic force to the grinding assembly (6).

2. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 1, characterized in that, The guide assembly (3) includes a slide rail (31) mounted on the base (1) and a slider (32) movably connected to the slide rail (31).

3. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 2, characterized in that, The connecting assembly (5) includes a positioning seat (51), a fixing block (52), a connecting plate (53), a fastening block (54), a limiting block (55), and a connecting rod (56); The positioning seat (51) is mounted on the slider (32) and connected to the output end of the driver (2); The fastening block (54) and the limiting block (55) are separately installed at both ends of the positioning seat (51), and the fixing block (52) is located between the fastening block (54) and the limiting block (55). The two ends of the connecting rod (56) are respectively connected to the fastening block (54) and the limiting block (55). The connecting rod (56) passes through the fixing block (52), and the fixing block (52) can move back and forth along the axial direction of the connecting rod (56). The connecting plate (53) is connected to the retaining block (52).

4. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 3, characterized in that, The elastic element (4) is sleeved on the outer periphery of the connecting rod (56), with the first end of the elastic element (4) abutting against the fastening block (54) and the second end of the elastic element (4) abutting against the retaining block (52).

5. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 4, characterized in that, The number of the elastic element (4) and the connecting rod (56) are both two.

6. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 3, characterized in that, The polishing assembly (6) includes a first polishing body (61) mounted on the connecting plate (53) and a polishing disc (62) connected to the first polishing body (61).

7. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 2, characterized in that, The connecting assembly (5) includes a fixed seat (501) mounted on the slider (32), a transition seat (502) mounted on the fixed seat (501), and a mounting seat (503), wherein the mounting seat (503) is hinged to the transition seat (502) via a rotating shaft (504).

8. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 7, characterized in that, The first end of the elastic element (4) is connected to the fixed base (501), and the second end of the elastic element (4) is connected to the mounting base (503).

9. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 7, characterized in that, The polishing assembly (6) includes a second polishing body (63) mounted on the mounting base (503) and a polishing head (64) connected to the second polishing body (63).

10. The adaptive grinding mechanism for the pipe inner wall anti-corrosion surface treatment fixture according to claim 1, characterized in that, The actuator (2) is an electric actuator, a hydraulic actuator, or a pneumatic actuator.

Images