Rotating mechanism of pipeline inner wall anti-corrosion surface treatment tool

Abstract

The utility model discloses a rotating mechanism of a pipeline inner wall anti-corrosion surface treatment tool. The rotating mechanism comprises a base, a driving assembly, a limiting assembly, a rotating annular gear, a base and an electric slip ring. According to the rotating mechanism of the pipeline inner wall anti-corrosion surface treatment tool, a rotating annular gear is driven to rotate through a driving assembly, the rotating function of a polishing mechanism of the pipeline inner wall anti-corrosion surface treatment tool can be achieved, and movement of the rotating annular gear is limited through cooperation of a limiting assembly and the rotating annular gear; and meanwhile, when the rotary annular gear rotates continuously through the electric slip ring, a power source and a signal power source are transmitted, the stability of the rotary mechanism in the working process can be guaranteed, and the rotary mechanism is simple in structure and high in connection reliability.

Description

Technical Field

[0001] This utility model relates to the field of anti-corrosion construction in nuclear power plants, and in particular to a rotating mechanism for a surface treatment fixture for anti-corrosion of the inner wall of a pipeline. Background Technology

[0002] Currently, at nuclear power plant corrosion protection construction sites, removing the original anti-corrosion layer and reapplying it through surface treatment of the original pipeline inner wall is a more cost-effective approach. 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 the protection. The conventional method for pipeline corrosion protection surface treatment is manual grinding with a handheld grinder, which is only effective for a certain length of pipeline. As the pipeline length increases, accessibility remains impossible.

[0003] Currently, there is a lack of a lightweight rotating mechanism that can be used for pipe inner wall anti-corrosion surface treatment tooling, which can achieve rotational motion while ensuring connection reliability, and achieve reciprocating motion at a certain angle under the control of the control system. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a rotating mechanism for a pipe inner wall anti-corrosion surface treatment tool.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a rotating mechanism for a pipe inner wall anti-corrosion surface treatment tool, which includes a base, a driving component, a limiting component, a rotating ring gear, a base and an electric slip ring.

[0006] The rotating ring gear is located on the base;

[0007] The drive assembly is connected to the base and is used to drive the rotating ring gear to rotate.

[0008] The limiting component is connected to the rotating ring gear and is used to limit the direction of movement of the rotating ring gear;

[0009] The base is connected to the rotating ring gear and can rotate under the drive of the drive assembly;

[0010] The slip ring is connected to the base.

[0011] In some embodiments, the drive assembly includes a plurality of drive devices, each of which includes a rotary driver connected to the base and a drive gear connected to the rotary driver, the drive gear meshing with the rotary ring gear.

[0012] In some embodiments, the number of drive devices is three, and the three drive devices are arranged separately along the central axis of the base.

[0013] In some embodiments, the rotating ring gear has a limiting groove, and the limiting component includes a first limiting bearing, a snap ring, and a pressure plate;

[0014] The first limiting bearing is installed in the limiting groove, the snap ring is used to restrict the first limiting bearing within the limiting groove, and the first limiting bearing is connected to the base through the pressure plate.

[0015] In some embodiments, the base is provided with a boss, the boss matches the inner ring of the first limiting bearing, and the boss is matched and connected to the slip ring.

[0016] In some embodiments, the limiting assembly includes a plurality of separately arranged limiting devices, each of the limiting devices including a second limiting bearing, a first bearing support, a bearing fixing member, and a second fixing member;

[0017] The rotating ring gear has a receiving groove, and the outer ring of the second limiting bearing is installed in the receiving groove and restricts the rotating ring gear to only rotate.

[0018] The first bearing support and the bearing fixing member are used together to position the second limiting bearing, and the second fixing member is used to lock the positions of the second limiting bearing, the bearing fixing member and the first bearing support.

[0019] In some embodiments, the number of limiting devices is at least three, and the at least three limiting devices are arranged separately along the central axis of the base.

[0020] In some embodiments, the limiting component includes a plurality of separately arranged limiting mechanisms, each of the limiting mechanisms including a second bearing support, a third limiting bearing, and a third fixing member;

[0021] The rotating ring gear has a receiving groove, and the outer ring of the third limiting bearing is installed in the receiving groove and restricts the rotating ring gear to only rotate.

[0022] The second bearing support is used to support the third limiting bearing, and the third fixing member is used to lock the positions of the second bearing support and the third limiting bearing.

[0023] In some embodiments, the rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture further includes a central bearing, which is installed at the center of the base, one end of the base is connected to the central bearing, and the other end of the base is connected to the rotating ring gear.

[0024] In some embodiments, the number of limiting mechanisms is at least three, and the at least three limiting mechanisms are arranged separately along the central axis of the base.

[0025] The present invention has the following advantages: the rotating mechanism of the pipe inner wall anti-corrosion surface treatment tool drives the rotating ring gear to rotate through the driving component, which realizes the rotation function of the grinding mechanism of the pipe inner wall anti-corrosion surface treatment tool. The movement of the rotating ring gear is restricted by the limiting component cooperating with the rotating ring gear. At the same time, the power supply and signal power are transmitted through the electric slip ring when the rotating ring gear rotates continuously, which can ensure the stability of the rotating mechanism during operation. The rotating mechanism has a simple structure and high connection reliability. Attached Figure Description

[0026] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model;

[0028] Figure 2 This is an exploded view of the components of the first embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model;

[0029] Figure 3 This is a cross-sectional view of the component structure of the first embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model;

[0030] Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool according to some embodiments of this utility model;

[0031] Figure 5 This is an exploded view of the components of the second embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model;

[0032] Figure 6 This is a schematic diagram of the overall structure of the third embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model;

[0033] Figure 7This is an exploded view of the components of the third embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model.

[0034] Figure 8 This is a schematic diagram of the third embodiment of the rotating mechanism of a pipe inner wall anti-corrosion surface treatment tool in some embodiments of this utility model. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] Please see Figures 1 to 8This invention relates to a rotating mechanism for a pipe inner wall anti-corrosion surface treatment fixture, as described in some embodiments of the present invention. The mechanism includes a base 1, a drive assembly 2, a limiting assembly 3, a rotating ring gear 4, a base 5, and an electric slip ring 6. The rotating ring gear 4 is located on the base 1; the drive assembly 2 is connected to the base 1 and drives the rotating ring gear 4 to rotate; the limiting assembly 3 is connected to the rotating ring gear 4 and limits the direction of movement of the rotating ring gear 4; the base 5 is connected to the rotating ring gear 4 and can rotate under the drive of the drive assembly 2; the electric slip ring 6 is connected to the base 1 and transmits power and signal power when the rotating ring gear 4 rotates continuously.

[0038] 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.

[0039] Specifically, this rotating mechanism is applied to a pipe inner wall anti-corrosion surface treatment fixture. The base 1 of this rotating mechanism is specifically used to connect with the crawling mechanism of the pipe inner wall anti-corrosion surface treatment fixture. The base 1 and the crawling mechanism of the pipe inner wall anti-corrosion surface treatment fixture are relatively stationary, while the base 5 is specifically used to connect with the grinding mechanism of the pipe inner wall anti-corrosion surface treatment fixture. Furthermore, to reduce weight, the base 1, base 5, and rotating ring gear 4 can be made of lightweight metal or engineering plastic, and the base 1 and base 5 can be designed with a hollow structure while meeting structural strength requirements. This rotating mechanism is used to realize the rotation function of the grinding mechanism of the pipe inner wall anti-corrosion surface treatment fixture, while the electric slip ring 6 is used to realize the sliding rotational connection of the power supply and control signals of the grinding mechanism.

[0040] Understandably, the rotating mechanism of this pipe inner wall anti-corrosion surface treatment fixture drives the rotating ring gear 4 to rotate via the drive component 2, enabling the grinding mechanism of the fixture to rotate. The movement of the rotating ring gear 4 is limited by the limiting component 3, which works in conjunction with the rotating ring gear 4. Simultaneously, the electric slip ring 6 transmits power and signal power during continuous rotation of the rotating ring gear 4, ensuring the stability of the rotating mechanism during operation. This rotating mechanism has a simple structure and high connection reliability. An electric slip ring is a type of conductive slip ring primarily used to transmit power and signal power during unrestricted continuous rotation. It is an electrical component responsible for connecting and transmitting energy and signals to rotating bodies. It is typically installed at the rotation center of equipment. The main function of the electric slip ring is to transmit signals and power during rotation, ensuring that there is no twisting or damage between rotating and stationary parts. It utilizes the relative rotational sliding contact between the slip ring body and the brush to complete the transmission of signals and power.

[0041] The drive assembly 2 includes multiple drive devices, each including a rotary driver 21 connected to the base 1 and a drive gear 22 connected to the rotary driver 21. The drive gear 22 meshes with a rotating ring gear 4. The rotary driver 21 is preferably a stepper motor, which 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 stepper motor operates based on electromagnetic principles, converting electrical energy into mechanical energy. Its basic structure includes a stator and a rotor, generating electromagnetic torque through the principle of electromagnetism to achieve rotational or linear motion. It enables precise positioning and speed regulation, ensuring the pipe-climbing mechanism can move stably on the inner wall of the pipe. In some other embodiments, the rotary driver 21 may be a servo motor.

[0042] In addition, multiple rotary actuators 21 simultaneously drive the rotating ring gear 4 to rotate, ensuring that the drive device has sufficient power to drive the rotating ring gear 4. In this embodiment, there are three drive devices, which are arranged separately along the central axis of the base 1. In other embodiments, the number and arrangement of the drive devices can be adjusted according to the actual situation, and no specific limitation is made here.

[0043] In this embodiment, in order to adapt to space constraints, the connection and arrangement of the rotating mechanism are divided into various ways to accommodate the inner walls of pipes with different diameters.

[0044] like Figures 1 to 3As shown, the first structural method of this rotating mechanism is suitable for the inner wall of a pipe with a small diameter, such as a pipe with a specification of DN200. Specifically, the rotating ring gear 4 has a limiting groove 41. The limiting assembly 3 includes a first limiting bearing 31, a retaining ring 32, and a pressure plate 33. The first limiting bearing 31 is installed in the limiting groove 41, and the retaining ring 32 is used to restrict the first limiting bearing 31 within the limiting groove 41. The first limiting bearing 31 is connected to the base 1 via the pressure plate 33. Understandably, the rotating ring gear 4 has a limiting groove 41 on its inner side. For pipes with small diameters, the upper edge diameter of the limiting groove 41 is larger than the lower edge diameter. The first limiting bearing 31 is installed in the limiting groove 41 and matches the rotating ring gear 4. The first limiting bearing 31 is embedded in the rotating ring gear 4, and the retaining ring 32 restricts the first limiting bearing 31 within the limiting groove 41. The inner ring of the first limiting bearing 31 is connected to the base 1 via the pressure plate 33.

[0045] In addition, the base 1 is provided with a boss 11, which matches the inner ring of the first limiting bearing 31 and is also matched and connected to the electric slip ring 6. The boss 11 is specifically located at the center of the base 1, and the electric slip ring 6 is located at the center of the base 1. In the first structural configuration of the rotating mechanism, the base 1 and the base 5 have the same external dimensions.

[0046] like Figures 4 to 5 As shown, the second structural method of this rotating mechanism is suitable for the inner wall of pipes with slightly larger diameters, such as the inner wall of a pipe with a specification of DN500. Its specific structure is as follows: the limiting component 3 includes multiple separately arranged limiting devices, each of which includes a second limiting bearing 34, a first bearing support 301, a bearing fixing member 35, and a second fixing member 36. The rotating ring gear 4 has a receiving groove 42. The outer ring of the second limiting bearing 34 is installed in the receiving groove 42 and restricts the rotating ring gear 4 to only rotate. The first bearing support 301 and the bearing fixing member 35 are used together to position the second limiting bearing 34. The second fixing member 36 is used to lock the positions of the second limiting bearing 34, the bearing fixing member 35, and the first bearing support 301. The number of limiting devices is at least three, and the at least three limiting devices are arranged separately along the central axis of the base 1. In this embodiment, the number of limiting devices is specifically twelve. Understandably, the outer ring of the second limiting bearing 34 is recessed into the receiving groove 42, restricting the rotating ring gear 4 to only rotate. The second fixing member 36 can be a fixing bolt, which can lock the position of the second limiting bearing 34 and the bearing fixing member 35. In the second structural configuration of the rotating mechanism, the base 5 is rectangular and is directly connected to the upper surface of the rotating ring gear 4.

[0047] like Figures 6 to 8As shown, the third structural method of this rotating mechanism is suitable for the inner wall of pipes with larger diameters, such as pipes with a specification of DN800. Its specific structure is as follows: the limiting component 3 includes multiple separately arranged limiting mechanisms, each including a second bearing support 37, a third limiting bearing 38, and a third fixing member 39. The rotating ring gear 4 has a receiving groove 43. The outer ring of the third limiting bearing 38 is installed in the receiving groove 43, restricting the rotating ring gear 4 to only rotate. The second bearing support 37 supports the third limiting bearing 38, and the third fixing member 39 locks the positions of the second bearing support 37 and the third limiting bearing 38. Specifically, the outer ring of the third limiting bearing 38 is recessed into the receiving groove 43, restricting the rotating ring gear 4 to only rotate. The third fixing member 39 can be a fixing bolt, which can lock the positions of the second bearing support 37 and the third limiting bearing 38. The number of limiting mechanisms is at least three, and the at least three limiting mechanisms are arranged separately along the central axis of the base 1. In this embodiment, the specific number of limiting mechanisms is six.

[0048] In the third structural configuration of the rotating mechanism, the rotating mechanism of the pipe inner wall anti-corrosion surface treatment tool also includes a central bearing 8. The central bearing 8 is installed at the center of the base 1, one end of the base 5 is connected to the central bearing 8, and the other end of the base 5 is connected to the rotating ring gear 4. Since the inner wall of the pipe is large, the area of ​​the base 5 is also relatively large. The central bearing 8 is added to ensure that the base 5 with a large area can rotate normally.

[0049] In summary, the rotating mechanism of this pipe inner wall anti-corrosion surface treatment fixture achieves rotation through the cooperation of limit bearings and rotating ring gear 4. The structure is simple and the connection is highly reliable. Furthermore, by using multiple limit bearings in conjunction with rotating ring gear 4, the rotation function of large pipe structures can be achieved, solving the problem that the centering structure cannot achieve centering due to its own weight causing eccentricity.

[0050] 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. A rotating mechanism for a pipe inner wall anti-corrosion surface treatment fixture, characterized in that, It includes a base (1), a drive assembly (2), a limiting assembly (3), a rotating ring gear (4), a base (5), and an electric slip ring (6); The rotating ring gear (4) is located on the base (1); The drive assembly (2) is connected to the base (1) and is used to drive the rotating ring gear (4) to rotate; The limiting component (3) is connected to the rotating ring gear (4) and is used to limit the direction of movement of the rotating ring gear (4); The base (5) is connected to the rotating ring gear (4) and can rotate under the drive of the drive assembly (2); The slip ring (6) is connected to the base (1).

2. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 1, characterized in that, The drive assembly (2) includes a plurality of drive devices, each of which includes a rotary driver (21) connected to the base (1) and a drive gear (22) connected to the rotary driver (21), the drive gear (22) meshing with the rotary ring gear (4).

3. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 2, characterized in that, The number of driving devices is three, and the three driving devices are arranged separately along the central axis of the base (1).

4. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 1, characterized in that, The rotating ring gear (4) has a limiting groove (41), and the limiting component (3) includes a first limiting bearing (31), a snap ring (32), and a pressure plate (33); The first limiting bearing (31) is installed in the limiting groove (41), the snap ring (32) is used to restrict the first limiting bearing (31) in the limiting groove (41), and the first limiting bearing (31) is connected to the base (1) through the pressure plate (33).

5. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 4, characterized in that, The base (1) is provided with a boss (11), which matches the inner ring of the first limiting bearing (31) and is matched and connected to the electric slip ring (6).

6. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 1, characterized in that, The limiting component (3) includes multiple separately arranged limiting devices, each of which includes a second limiting bearing (34), a first bearing support (301), a bearing fixing member (35), and a second fixing member (36). The rotating ring gear (4) has a receiving groove (42), and the outer ring of the second limiting bearing (34) is installed in the receiving groove (42) and restricts the rotating ring gear (4) to only rotate. The first bearing support (301) and the bearing fixing member (35) are used together to position the second limiting bearing (34), and the second fixing member (36) is used to lock the positions of the second limiting bearing (34), the bearing fixing member (35) and the first bearing support member (301).

7. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 6, characterized in that, The number of the limiting devices is at least three, and the at least three limiting devices are arranged separately along the central axis of the base (1).

8. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 1, characterized in that, The limiting component (3) includes a plurality of separately arranged limiting mechanisms, each of which includes a second bearing support (37), a third limiting bearing (38) and a third fixing member (39); The rotating ring gear (4) has a receiving groove (43), and the outer ring of the third limiting bearing (38) is installed in the receiving groove (43) and restricts the rotating ring gear (4) to only rotate. The second bearing support (37) is used to support the third limiting bearing (38), and the third fixing member (39) is used to lock the positions of the second bearing support (37) and the third limiting bearing (38).

9. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 8, characterized in that, The rotating mechanism of the pipe inner wall anti-corrosion surface treatment tool also includes a central bearing (8), which is installed at the center of the base (1). One end of the base (5) is connected to the central bearing (8), and the other end of the base (5) is connected to the rotating ring gear (4).

10. The rotating mechanism of the pipe inner wall anti-corrosion surface treatment fixture according to claim 8, characterized in that, The number of the limiting mechanisms is at least three, and the at least three limiting mechanisms are arranged separately along the central axis of the base (1).

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