Long elbow pipe inner wall polishing device

Abstract

The utility model relates to polishing device technical field discloses long elbow pipe inner wall polishing device, including multisection type connecting arm, connecting flange, drive arrangement and polishing device, multisection type connecting arm one end connects controller, multisection type connecting arm other end connects connecting flange one end face, and the fixed end of drive arrangement is connected to connecting flange other end face, and the drive end of drive arrangement is connected to polishing device. The utility model reaches the purpose of low -cost alternative mechanical arm through the cooperation design of auxiliary drive integrated device and multisection type connecting arm. The utility model mainly includes multisection type connecting arm, connecting flange, drive arrangement and polishing device, and each component works cooperatively, realizes the efficient polishing to long elbow pipe inner wall.

Description

Technical Field

[0001] This utility model relates to the technical field of grinding devices, specifically a grinding device for the inner wall of a long curved pipe. Background Technology

[0002] In numerous industrial sectors, such as petrochemicals, shipbuilding, and urban water supply and drainage systems, pipelines serve as crucial fluid transmission channels, and their quality and performance are paramount. During the manufacturing process, pipeline inner walls often contain defects such as burrs, welding slag, and oxide scale due to processing techniques. These defects not only affect the smooth flow of fluids within the pipeline, increasing fluid resistance and reducing transmission efficiency, but can also contaminate the fluid, impacting product quality. In industries with extremely high requirements for fluid purity, such as food and pharmaceuticals, even minor imperfections on the pipeline inner wall can lead to product defects and serious quality problems. Furthermore, over long-term use, the inner wall of pipelines may develop uneven surfaces due to corrosion and scaling, necessitating grinding to restore the pipeline's normal performance. Therefore, grinding the inner wall of pipelines is a vital step in ensuring pipeline quality and performance, leading to the development of pipeline grinding equipment.

[0003] With the continuous improvement of industrial automation, pipe grinding equipment is also constantly developing and improving. Early pipe grinding relied mainly on manual operation, with workers holding grinding tools and entering the pipes to grind. This method was not only labor-intensive and inefficient, but also difficult to guarantee grinding quality. This was especially true for long, curved pipes, where manual operation was even more difficult, and sometimes impossible to enter the pipes for grinding. Later, mechanical pipe grinding devices gradually emerged. These devices improved grinding efficiency and quality to some extent, but still have many limitations when dealing with long, curved pipes, especially those with complex bending angles and large diameter variations.

[0004] Existing pipe grinding devices have significant shortcomings when processing the inner walls of long, curved pipes. On the one hand, many grinding devices have fixed structures and poor flexibility, making it difficult to adapt to the complex bending shapes and varying pipe diameters of long, curved pipes. During grinding, they cannot automatically adjust the grinding position and angle according to the actual shape of the pipe, resulting in over-grinding in some areas and under-grinding in others, leading to uneven grinding quality and affecting the overall smoothness and finish of the pipe's inner wall. On the other hand, some grinding devices with a degree of flexibility employ complex structures such as robotic arms. While these can achieve relatively precise grinding operations, the high cost of robotic arms, including both initial purchase and subsequent maintenance, is prohibitive for many small and medium-sized enterprises. Furthermore, the operation and maintenance of robotic arms require specialized technicians, further increasing labor costs. Therefore, developing a grinding device that can adapt to the grinding needs of irregular inner walls of long, curved pipes and provide a low-cost alternative to robotic arms is of significant practical importance.

[0005] To address the aforementioned issues, we propose a device for grinding the inner wall of long curved pipes. Utility Model Content

[0006] The purpose of this invention is to provide a grinding device for the inner wall of long curved pipes to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a grinding device for the inner wall of a long curved pipe, comprising a multi-section connecting arm, a connecting flange, a driving device, and a grinding device; one end of the multi-section connecting arm is connected to a controller; the other end of the multi-section connecting arm is connected to one end face of the connecting flange; the other end face of the connecting flange is connected to the fixed end of the driving device; and the driving end of the driving device is connected to the grinding device.

[0008] Preferably, one end of the multi-section connecting arm is connected to the controller via an auxiliary mounting block.

[0009] Preferably, the multi-section connecting arm includes multiple connecting rods and multiple composite universal joints; one end of each connecting rod is connected to one of the composite universal joints; and the other end of one of the connecting rods is connected to the connecting flange.

[0010] Preferably, the composite universal joint includes a first joint and a second joint; the connecting end of the first joint is connected to the connecting end of the second joint; the direction of movement of the first joint is perpendicular to the direction of movement of the second joint.

[0011] Preferably, the connecting rod is connected to the composite universal joint via an auxiliary drive integration device; the auxiliary drive integration device includes a dustproof box and an auxiliary drive motor; the auxiliary drive motor is detachably connected inside the dustproof box; the drive end of the auxiliary drive motor passes through the side of the dustproof box and is connected to the composite universal joint.

[0012] Preferably, the auxiliary mounting block has a wiring port; the circumferential sidewall of the connecting flange has a cable outlet; the multi-section connecting arm has an inner cavity; and the wiring port is connected to the cable outlet through the inner cavity of the multi-section connecting arm.

[0013] Preferably, the grinding device includes a turntable, a grinding head, and an elastic element; one end face of the turntable is connected to the driving end of the driving device; a plurality of sliding grooves are evenly formed on the circumferential sidewall of the turntable; the grinding head is slidably connected in the sliding groove of the turntable; one end of the elastic element is connected to the grinding head; the other end of the elastic element is connected to the inner sidewall of the sliding groove of the turntable.

[0014] Preferably, the sidewall of the rotary sliding groove is provided with a protrusion; the sidewall of the grinding head is provided with a groove for engaging and connecting the protrusion of the rotary sliding groove.

[0015] Compared with existing technologies, the beneficial effects of this utility model are: this long curved pipe inner wall grinding device can achieve the purpose of replacing the robotic arm at low cost through the cooperative design of the auxiliary drive integrated device and the multi-section connecting arm. This utility model mainly includes the multi-section connecting arm, the connecting flange, the drive device, and the grinding device. The components work together to achieve efficient grinding of the inner wall of the long curved pipe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the auxiliary drive integrated device in this utility model.

[0017] In the diagram: 1-Auxiliary mounting block, 2-Multi-section connecting arm, 21-Connecting rod, 22-Composite universal joint, 221-First joint, 222-Second joint, 3-Connecting flange, 4-Drive device, 5-Grinding device, 51-Turntable, 52-Grinding head, 53-Elastic element, 6-Auxiliary drive integrated device, 61-Dustproof box, 62-Auxiliary drive motor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 , Figure 2 This utility model provides a technical solution: a grinding device for the inner wall of a long curved pipe, including a multi-section connecting arm 2, a connecting flange 3, a driving device 4, and a grinding device 5.

[0020] One end of the multi-section connecting arm 2 is connected to the controller via the auxiliary mounting block 1. The auxiliary mounting block 1 has a wiring port 11 for connecting control circuitry and transmitting controller commands to various parts of the device. The other end of the multi-section connecting arm 2 is connected to one end face of the connecting flange 3. The multi-section connecting arm 2 has an inner cavity, which protects the internal wiring and provides space for wiring arrangement.

[0021] The multi-section connecting arm 2 consists of multiple connecting rods 21 and multiple composite universal joints 22. One end of each connecting rod 21 is connected to a composite universal joint 22, and the other end of one connecting rod 21 is connected to the connecting flange 3. This multi-section design gives the multi-section connecting arm 2 good flexibility and adaptability, allowing it to bend and adjust to a certain extent according to the bending shape of long curved pipes, thus better adapting to the grinding needs of the inner walls of long curved pipes of different specifications and shapes. Furthermore, this setup is cost-effective, requiring minimal investment in the purchase and maintenance of the robotic arm.

[0022] The composite universal joint 22 is a key component for the flexible rotation of the multi-section connecting arm 2. The composite universal joint 22 includes a first joint 221 and a second joint 222. The connecting end of the first joint 221 is connected to the connecting end of the second joint 222, and the direction of movement of the first joint 221 is perpendicular to the direction of movement of the second joint 222. This perpendicularly intersecting direction of movement design allows the composite universal joint 22 to rotate freely on two mutually perpendicular planes, greatly increasing the rotation range and flexibility of the multi-section connecting arm 2, enabling the device to more smoothly enter the interior of long curved pipes for grinding operations.

[0023] The connecting rod 21 is connected to the composite universal joint 22 via the auxiliary drive integration device 6. The auxiliary drive integration device 6 includes the dustproof box 61 and the auxiliary drive motor 62. The dustproof box 61 is sealed, and the auxiliary drive motor 62 is detachably connected inside. This detachable connection facilitates maintenance and replacement of the auxiliary drive motor 62. The drive end of the auxiliary drive motor 62 passes through the side of the dustproof box 61 and connects to the composite universal joint 22. During operation, the auxiliary drive motor 62 provides additional driving force to the composite universal joint 22, assisting the multi-section connecting arm 2 in bending and rotating, further improving the adaptability and flexibility of the device. Simultaneously, the dustproof box 61 effectively prevents dust and other impurities from entering the auxiliary drive motor 62, ensuring its normal operation. The auxiliary drive motor 62 is a permanent magnet synchronous motor.

[0024] The connecting flange 3 serves to connect the multi-section connecting arm 2 and the drive device 4. One end of the connecting flange 3 is connected to the multi-section connecting arm 2, and the other end is connected to the fixed end of the drive device 4. A cable outlet 31 is provided on the circumferential side wall of the connecting flange 3. The cable outlet 31 connects to the wiring port 11 on the auxiliary mounting block 1 through the inner cavity of the multi-section connecting arm 2, allowing the control circuitry to be led out from inside the multi-section connecting arm 2 and connected to the drive device 4, ensuring that the auxiliary drive motors 62 of each part of the device can receive commands from the controller and work collaboratively.

[0025] The fixed end of the drive device 4 is connected to the connecting flange 3, and the driving end of the drive device 4 is connected to the grinding device 5. In this invention, a small flange is also provided at the connection point between the driving end of the drive device 4 and the grinding device 5 to prevent loosening between the grinding device 5 and the driving end of the drive device 4 due to excessively high rotational speed. During operation, the drive device 4 provides rotational power to the grinding device 5, driving it to rotate at high speed, thereby grinding the inner wall of the long curved pipe. The drive device 4 can be an AC permanent magnet synchronous motor; an AC permanent magnet synchronous motor with appropriate power and speed can be selected according to the actual grinding requirements.

[0026] AC permanent magnet synchronous motors have no excitation losses. The rotor uses permanent magnets such as neodymium iron boron to generate a fixed magnetic field, eliminating the need for external excitation current. This eliminates the rotor copper losses and excitation losses of traditional asynchronous motors, resulting in efficiency that is generally 5% to 15% higher than asynchronous motors, especially under light loads. This high efficiency and energy saving reduces operating costs. The high magnetic field strength of permanent magnets allows the motor to be significantly smaller and lighter than asynchronous motors for the same power output, facilitating integration into grinding machines and saving installation space. High power density further reduces installation space. A wide speed range of over 1:1000 can be achieved through a frequency converter, maintaining high torque output even at low speeds to meet the grinding speed requirements of different materials such as metals, wood, and plastics. Millisecond-level torque response and low starting current minimize impact on the power grid and equipment, making it suitable for grinding scenarios requiring frequent starts and stops. The wide speed range adapts to diverse grinding needs. AC permanent magnet synchronous motors also feature high control precision, improving grinding quality, and low noise and vibration, improving the working environment.

[0027] The grinding device 5 acts directly on the inner wall of the long, curved pipe and is the core component for achieving the grinding function. The grinding device 5 includes a turntable 51, a grinding head 52, and an elastic element 53. One end of the turntable 51 is connected to the drive end of the drive device 4, allowing it to rotate at high speed around its own axis under the drive of the drive device 4. Multiple sliding grooves are evenly distributed on the circumferential sidewall of the turntable 51, with a grinding head 52 slidably connected in each groove. The depth of each sliding groove is sufficient to accommodate the elastic element 53 and the grinding head 52; this design is to prevent jamming in irregular pipes under extremely special circumstances. The grinding head 52 is connected to the sliding groove of the turntable 51 via the elastic element 53. The elastic element 53 can be a spring or other elastic component. During the grinding process, when the grinding head 52 contacts the inner wall of the long curved pipe, the elastic element 53 can generate corresponding elastic deformation according to the unevenness of the inner wall, so that the grinding head 52 always maintains close contact with the inner wall, thereby ensuring the uniformity and quality of grinding.

[0028] Furthermore, the sidewall of the sliding groove of the turntable 51 is provided with a protrusion, and the sidewall of the grinding head 52 is provided with a groove for engaging and connecting with the protrusion of the sliding groove of the turntable 51. This protrusion-groove engagement design prevents the grinding head 52 from falling out of the sliding groove during sliding, ensuring the stability and reliability of the grinding device 5.

[0029] It can be further explained here that the auxiliary drive motor 62 can also be configured by setting another set of auxiliary drive motors 62 at least one set apart from the composite universal joints 22. This configuration can further reduce costs, and some of the composite universal joints 22 do not have external driving force, allowing for more flexible adaptation to irregular conditions inside the pipeline.

[0030] Working principle: First, connect the device to the controller via the auxiliary mounting block 1, ensuring all wiring connections are correct. Then, pre-adjust the bending degree of the multi-section connecting arm 2 according to the specifications and shape of the long bend, allowing it to smoothly enter the long bend. During the adjustment process, the composite universal joint 22, under the auxiliary drive of the auxiliary drive motor 62 in the auxiliary drive integrated device 6, achieves flexible rotation, enabling the multi-section connecting arm 2 to better adapt to the bending shape of the long bend.

[0031] Once the device is positioned appropriately inside the long curved pipe, the drive device 4 is activated, causing the grinding device 5 to rotate at high speed. Under the action of the elastic element 53, the grinding head 52 in the grinding device 5 tightly conforms to the inner wall of the long curved pipe, grinding the inner wall as the turntable 51 rotates. During the grinding process, the operator can adjust various parameters of the device via the controller, such as the rotation speed of the drive device 4 and the degree of bending of the multi-section connecting arm 2, to achieve the best grinding effect. After grinding is complete, the device is removed from the long curved pipe, completing the entire grinding operation.

[0032] The auxiliary drive integrated device 6 adjusts the bending degree of the multi-section connecting arm 2 when the grinding device 5 is working, so as to achieve a real-time adjustment effect.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for grinding the inner wall of a long curved pipe, characterized in that, It includes a multi-section connecting arm (2), a connecting flange (3), a drive device (4), and a grinding device (5); one end of the multi-section connecting arm (2) is connected to a controller; the other end of the multi-section connecting arm (2) is connected to one end face of the connecting flange (3); the other end face of the connecting flange (3) is connected to the fixed end of the drive device (4); the drive end of the drive device (4) is connected to the grinding device (5). The grinding device (5) includes a turntable (51), a grinding head (52), and an elastic element (53); one end of the turntable (51) is connected to the driving end of the driving device (4); a plurality of sliding grooves are evenly provided on the circumferential sidewall of the turntable (51); the grinding head (52) is slidably connected in the sliding groove of the turntable (51); one end of the elastic element (53) is connected to the grinding head (52); the other end of the elastic element (53) is connected to the inner sidewall of the sliding groove of the turntable (51).

2. The long curved pipe inner wall grinding device according to claim 1, characterized in that, One end of the multi-section connecting arm (2) is connected to the controller via an auxiliary mounting block (1).

3. The long curved pipe inner wall grinding device according to claim 1, characterized in that, The multi-section connecting arm (2) includes multiple connecting rods (21) and multiple composite universal joints (22); one end of each connecting rod (21) is connected to one of the composite universal joints (22); the other end of one of the connecting rods (21) is connected to the connecting flange (3).

4. The long curved pipe inner wall grinding device according to claim 3, characterized in that, The composite universal joint (22) includes a first joint (221) and a second joint (222); the connecting end of the first joint (221) is connected to the connecting end of the second joint (222); the movement direction of the first joint (221) is perpendicular to the movement direction of the second joint (222).

5. The long curved pipe inner wall grinding device according to claim 3, characterized in that, The connecting rod (21) is connected to the composite universal joint (22) via an auxiliary drive integration device (6); the auxiliary drive integration device (6) includes a dustproof box (61) and an auxiliary drive motor (62); the auxiliary drive motor (62) is detachably connected inside the dustproof box (61); the drive end of the auxiliary drive motor (62) passes through the side of the dustproof box (61) and is connected to the composite universal joint (22).

6. The long curved pipe inner wall grinding device according to claim 2, characterized in that, The auxiliary mounting block (1) has a wiring port (11); the circumferential side wall of the connecting flange (3) has a cable outlet (31); the multi-section connecting arm (2) has an inner cavity; the wiring port (11) is connected to the cable outlet (31) through the inner cavity of the multi-section connecting arm (2).

7. The long curved pipe inner wall grinding device according to claim 1, characterized in that, The side wall of the sliding groove of the turntable (51) is provided with a protrusion; the side wall of the grinding head (52) is provided with a groove for cooperating with and connecting the protrusion of the sliding groove of the turntable (51).

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