A pipe beveling and grinding device for on-site construction

Abstract

This invention relates to a pipe beveling and grinding device for on-site construction, belonging to the field of pipe beveling and grinding technology. It includes a positioning ring and a reference ring disposed on one side of the positioning ring. Movable blocks are slidably mounted on the surfaces of both the positioning ring and the reference ring. A movable frame is fixedly mounted on the two opposing sides of each of the movable blocks. Several telescopic openings are equidistantly provided on the surfaces of both the positioning ring and the reference ring. Each telescopic opening has an extrusion component on its inner wall. Two adjusting screws are movably mounted on the inner wall of the movable frame, and a trapezoidal block is fixedly mounted at the lower end of each adjusting screw. This invention offers portable processing capabilities, allowing for pipe beveling anytime, anywhere. It also enables adjustment of the beveling of pipes after hoisting and fixing. Using the internal positioning components, mismatched beveling positions are ground and corrected, avoiding the need for secondary hoisting and processing, increasing pipe installation efficiency, and reducing pipe installation costs.

Description

Technical Field

[0001] This invention relates to the field of pipe beveling and grinding technology, specifically to a pipe beveling and grinding device for on-site construction. Background Technology

[0002] Pipe beveling and grinding is a crucial step in the prefabrication, installation, and welding of pipelines. It involves machining a bevel with a specific geometric shape on the pipe end face to be welded, either mechanically or manually, followed by cleaning and grinding of the bevel and surrounding surfaces. Its core purpose is to ensure the penetration, mechanical properties, and welding quality stability of the weld joint. When the pipe wall is thick, direct butt welding makes it difficult for the weld metal to melt into the joint root, easily resulting in incomplete penetration defects. The presence of a bevel increases the space of the weld pool, allowing the welding rod or wire to fully deposit at the joint root, forming a complete weld cross-section. Pipe beveling and grinding devices effectively solve these problems. A pipe beveling and grinding device is a mechanized tool specifically designed for beveling and grinding pipe end faces at pipeline installation sites. By integrating a power system, positioning mechanism, and grinding unit, it replaces the traditional manual grinding method using handheld grinders, efficiently and accurately producing pipe bevels that meet welding requirements. It is widely used in petrochemical, municipal pipeline, power construction, and industrial pipeline installation fields.

[0003] Traditional on-site pipe beveling methods typically involve preparing the beveling in a fixed processing shed before hoisting the pipe to the installation location for assembly and welding. For fixed installations such as buried pipes, the pipe is usually placed in a trench or pre-buried point before welding. However, due to factors such as on-site measurement errors, pipe manufacturing tolerances, hoisting deformation, or foundation settlement, poor beveling matching often occurs when two pipe sections are joined, resulting in problems such as misalignment, uneven gaps, or angle deviations. In such cases, the conventional approach is to hoist the already positioned pipe back into place and return it to the processing area for secondary grinding, or even replace the entire pipe section. This process not only consumes a lot of time and crane shifts but may also lead to project delays, unstable welding quality, and significantly increase construction costs and safety risks. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pipe beveling and grinding device for on-site construction, comprising a positioning ring and a reference ring disposed on one side of the positioning ring. Movable blocks are slidably mounted on the surfaces of both the positioning ring and the reference ring. A movable frame is fixedly mounted on the two opposing sides of the two movable blocks. A plurality of telescopic openings are equidistantly provided on the surfaces of both the positioning ring and the reference ring. An extrusion assembly is provided on the inner wall of each of the telescopic openings. Two adjusting screws are movably mounted on the inner wall of the movable frame, and a trapezoidal block is fixedly mounted on the lower end of each adjusting screw. Fastening blocks are threadedly connected to the upper and lower sides of the adjusting screw wall located on the movable frame.

[0005] A conversion cavity is provided on the inner wall of the moving block located on one side of the positioning ring, and a conversion component is provided inside the conversion cavity. A tool holder is fixedly installed on one side of the surface of the moving block with the conversion cavity, and a grinding component is provided inside the tool holder. A pad is fixedly installed on the side of the moving block with the conversion cavity away from the tool holder. A power motor is fixedly installed on the surface of the pad, and a connecting gear is fixedly installed on the output end of the power motor. A crown gear is meshed with the surface of the connecting gear.

[0006] By setting up the shims, the perpendicularity between the crown gear and the connecting gear can be ensured, thereby ensuring the stability of the gear transmission. Furthermore, with the reinforcement of the L-shaped reinforcing blocks, the shaking problem during the rotation of the power motor is greatly avoided.

[0007] Furthermore, the conversion assembly includes a connecting shaft rotatably mounted on one side of the inner wall of the conversion cavity, and a conversion gear is fixedly mounted on the side of the connecting shaft surface near the power motor. A connecting external gear ring is embedded in the surface of the positioning ring. The inner wall of the conversion cavity has a meshing port on one side of the conversion gear, and the surface of the connecting external gear ring extends into the conversion cavity through the meshing port and meshes with the surface of the conversion gear. A magnetic coupling is provided at the end of the connecting shaft away from the conversion gear, and a combination rod is fixedly mounted on the side of the magnetic coupling surface away from the connecting shaft.

[0008] By utilizing the magnetic coupling, when encountering hard points or sudden load changes during grinding, the magnetic coupling will slip and cut off the torque, preventing the grinding head from breaking or the motor from burning out.

[0009] Furthermore, one end of the combined rod extends through to the surface of the movable block, while the connecting shaft wall is rotatably mounted with a support block between the conversion gear and the magnetic coupling, and the end of the support block is fixedly connected to one side of the inner wall of the conversion cavity.

[0010] Furthermore, the grinding assembly includes a connecting tool bar rotatably mounted inside the tool holder, and a bevel gear set is installed at the end of the connecting tool bar near the conversion cavity. The bevel gear set is connected to the end of the combination rod for transmission. A diamond conical grinding head is fixedly installed at the end of the connecting tool bar away from the conversion cavity. The diamond conical grinding head has high hardness and sharp cutting edge. Combined with the stable transmission of the bevel gear set, it ensures that the bevel surface is smooth and flat, and meets the welding process requirements without additional grinding and finishing.

[0011] Furthermore, the inner wall of the extrusion assembly is threaded with an extrusion threaded rod, and an arc-shaped extrusion block is rotatably installed at one end of the extrusion threaded rod. The inner walls of the positioning ring and the reference ring are provided with a receiving groove on one side of the corresponding arc-shaped extrusion block. The positioning ring evenly clamps the pipe through multiple sets of arc-shaped extrusion blocks. Combined with the radial and axial constraints of the moving block by the annular flange, it ensures that the revolution trajectory of the grinding head is coaxial with the pipe, and the bevel forming has strong consistency, avoiding the tilting and unevenness problems of traditional manual grinding.

[0012] Furthermore, both the positioning ring and the reference ring have an integrally formed annular flange on their outer cylindrical surfaces, which encircles the entire circumference. The telescopic opening is located at the center of the annular flange. The surface of the crown gear is fixedly connected to the surface of the positioning ring, and the connecting external gear ring is located on one side of the annular flange of the positioning ring.

[0013] Furthermore, the movable block is provided with a slot that matches the contour of the annular flange. By straddling and engaging the annular flange through the slot, the movable block can slide along the circumferential direction of the annular flange and is constrained in the radial and axial directions.

[0014] Furthermore, a fitting groove for placing the bevel gear set is provided on one side of the surface of the movable block with the conversion cavity.

[0015] Furthermore, an L-shaped reinforcing block is rotatably mounted on the output shaft wall of the power motor, and the surface of the L-shaped reinforcing block is fixedly connected to the surface of the pad block.

[0016] Furthermore, a storage battery is embedded in the upper side of the movable block with the conversion cavity. The storage battery provides the necessary energy to the power motor, thus avoiding the need for the power motor to be connected by wires and ensuring the portability of the entire device.

[0017] Compared with the prior art, the present invention provides a pipe beveling and grinding device for on-site construction, which has the following beneficial effects:

[0018] 1. This device offers portable processing capabilities, enabling grinding of pipes anytime, anywhere. It also allows for adjustment of the bevels of pipes that have already been hoisted and fixed. By utilizing internal positioning components, mismatched bevel positions can be ground and corrected, avoiding the need for secondary hoisting and processing, thus improving the efficiency of pipe installation and reducing its cost.

[0019] 2. By setting up the pads, this device can ensure the perpendicularity between the crown gear and the connecting gear, thereby ensuring the stability of the gear transmission. Furthermore, with the reinforcement of the L-shaped reinforcing blocks, the shaking problem during the rotation of the power motor is greatly avoided.

[0020] 3. This device utilizes a storage battery to provide the necessary energy to the motor, thus avoiding the need for the motor to be connected by wires and ensuring the overall portability and processing efficiency of the device.

[0021] 4. This device utilizes a magnetic coupling. When encountering a hard point or a sudden change in load during grinding, the magnetic coupling will slip and cut off the torque, preventing the grinding head from breaking or the motor from burning out. Attached Figure Description

[0022] Figure 1 This is a perspective view of the entire invention;

[0023] Figure 2 This is a three-dimensional view of the entire invention.

[0024] Figure 3 This is a perspective view of the reference ring of the present invention;

[0025] Figure 4 for Figure 3 Enlarged structural diagram of section A in the middle;

[0026] Figure 5 This is a perspective view of the arc-shaped extrusion block of the present invention;

[0027] Figure 6 for Figure 5 Enlarged structural diagram of section B;

[0028] Figure 7 This is a vertical sectional perspective view of the movable block of the present invention;

[0029] Figure 8 for Figure 7 Enlarged structural diagram of section C;

[0030] Figure 9 This is a cross-sectional perspective view of the positioning ring of the present invention;

[0031] Figure 10 for Figure 9 Enlarged structural diagram of section D in the middle.

[0032] In the diagram: 1. Positioning ring; 2. Reference ring; 3. Moving block; 4. Moving frame; 5. Telescopic port; 6. Extrusion assembly; 601. Extrusion threaded rod; 602. Arc-shaped extrusion block; 603. Storage groove; 7. Adjustment screw; 8. Trapezoidal block; 9. Fastening block; 10. Conversion cavity; 11. Conversion assembly; 1101. Connecting shaft; 11011. Support port block; 1102. Conversion gear; 1103. Connecting external gear ring; 1104. Meshing port; 1105. Magnetic coupling; 1106. Combination rod; 12. Tool holder; 13. Grinding assembly; 1301. Connecting tool holder; 1302. Bevel gear set; 1303. Diamond cone grinding head; 14. Power motor; 1401. L-shaped reinforcing block; 15. Connecting gear; 16. Crown gear; 17. Pad block; 18. Trial fitting groove; 19. Battery. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 10 This embodiment of a pipe beveling and grinding device for on-site construction includes a positioning ring 1 and a reference ring 2 set on one side of the positioning ring 1. Movable blocks 3 are slidably installed on the surfaces of both the positioning ring 1 and the reference ring 2. Movable frames 4 are fixedly installed on the two opposing sides of the two movable blocks 3. A plurality of telescopic openings 5 ​​are equidistantly opened on the surfaces of both the positioning ring 1 and the reference ring 2. A pressing component 6 is provided on the inner wall of each telescopic opening 5. A pressing threaded rod 601 is threadedly connected to the inner wall of the pressing component 6. An arc-shaped pressing block 602 is rotatably installed at one end of the pressing threaded rod 601. A receiving groove 603 is opened on one side of the corresponding arc-shaped pressing block 602 on the inner wall of the positioning ring 1 and the reference ring 2. Two adjusting screws 7 are movably installed on the inner wall of the movable frame 4. A trapezoidal block 8 is fixedly installed at the lower end of the adjusting screw 7. Fastening blocks 9 are threadedly connected to the upper and lower sides of the adjusting screw 7.

[0035] The two adjusting screws 7 in this device have length scale markings on their walls. During adjustment, first fix the reference ring 2 on the standard calibration pipe or the already processed matching pipe as usual. Then rotate the adjusting screw 7 on the side of the reference ring 2 until the trapezoidal block 8 is in close contact with the outer wall of the pipe, and record its scale value. Then, using this scale as a reference, adjust the adjusting screw 7 on the side of the positioning ring 1 until the scales of the trapezoidal blocks 8 on both sides are consistent. At this time, the coaxiality and spacing of the positioning ring 1 and the reference ring 2 meet the docking requirements, ensuring the subsequent welding accuracy.

[0036] Furthermore, the positioning ring 1 of this device uniformly clamps the pipe through multiple sets of arc-shaped extrusion blocks 602, and combined with the radial and axial constraints of the moving block 3 by the annular flange, ensures that the revolution trajectory of the grinding head is coaxial with the pipe, resulting in strong consistency in bevel forming and avoiding the tilting and unevenness problems of traditional manual grinding. The design of the reference ring 2 and the adjusting screw 7 can accurately calibrate the coaxiality and spacing of the positioning ring 1 and the reference ring 2, effectively controlling the misalignment of the pipe joint, reducing uneven weld defects, providing a guarantee for the subsequent welding penetration, and reducing the amount of post-weld root cleaning work. The diamond conical grinding head 1303 has high hardness and sharp cutting edge, and with the stable transmission of the bevel gear set 1302, it ensures that the bevel surface is smooth and flat, and meets the welding process requirements without additional grinding and finishing.

[0037] A conversion cavity 10 is provided on the inner wall of the movable block 3 located on one side of the positioning ring 1, and a conversion component 11 is provided inside the conversion cavity 10. A tool holder 12 is fixedly installed on one side of the surface of the movable block 3 with the conversion cavity 10, and a grinding component 13 is provided inside the tool holder 12. A pad block 17 is fixedly installed on the side of the movable block 3 with the conversion cavity 10 away from the tool holder 12. A power motor 14 is fixedly installed on the surface of the pad block 17, and a connecting gear 15 is fixedly installed on the output end of the power motor 14. A crown gear 16 is meshed on the surface of the connecting gear 15. An L-shaped reinforcing block 1401 is rotatably installed on the output shaft wall of the power motor 14, and the surface of the L-shaped reinforcing block 1401 is fixedly connected to the surface of the pad block 17.

[0038] The conversion assembly 11 includes a connecting shaft 1101 rotatably mounted on one side of the inner wall of the conversion cavity 10. A conversion gear 1102 is fixedly mounted on the surface of the connecting shaft 1101 near the power motor 14. A connecting external gear ring 1103 is embedded in the surface of the positioning ring 1. A meshing port 1104 is provided on the inner wall of the conversion cavity 10 on one side of the conversion gear 1102. The surface of the connecting external gear ring 1103 extends into the conversion cavity 10 through the meshing port 1104 and meshes with the surface of the conversion gear 1102. Next, a magnetic coupling 1105 is provided at the end of the connecting shaft 1101 away from the conversion gear 1102, and a combination rod 1106 is fixedly installed on the side of the magnetic coupling 1105 away from the connecting shaft 1101. One end of the combination rod 1106 extends through to the surface of the moving block 3, and a support block 11011 is rotatably installed on the rod wall of the connecting shaft 1101 between the conversion gear 1102 and the magnetic coupling 1105, and the end of the support block 11011 is fixedly connected to one side of the inner wall of the conversion cavity 10.

[0039] The magnetic coupling 1105 adopts a non-contact torque transmission method, avoiding physical wear of transmission components and buffering transmission impact. It automatically disconnects power in case of overload, protecting the grinding head and power motor 14 from damage and reducing equipment maintenance costs. The moving block 3 is engaged with the annular flange through a slot, resulting in low sliding resistance and uniform force distribution. It is not easily deformed after long-term use, ensuring stable accuracy of the revolution trajectory and improving the overall durability of the device. The arc-shaped extrusion block 602 can be stored in the storage slot 603, avoiding collision damage when idle. It also fits tightly with the pipe contact surface, clamping firmly without slippage, and eliminating the risk of loosening during processing.

[0040] The grinding assembly 13 includes a connecting tool bar 1301 rotatably mounted inside the tool holder 12, and a bevel gear set 1302 is mounted on the end of the connecting tool bar 1301 near the conversion cavity 10. The bevel gear set 1302 is connected to the end of the combination rod 1106. A diamond conical grinding head 1303 is fixedly mounted on the end of the connecting tool bar 1301 away from the conversion cavity 10. A battery 19 is embedded in the upper side of the moving block 3 with the conversion cavity 10.

[0041] On the outer cylindrical surfaces of both the positioning ring 1 and the reference ring 2, an annular flange encircling the entire circumference is integrally provided. The telescopic port 5 is located at the center of the annular flange. The surface of the crown gear 16 is fixedly connected to the surface of the positioning ring 1. The connecting external gear ring 1103 is located on one side of the annular flange of the positioning ring 1. The moving block 3 is provided with a slot that matches the contour of the annular flange. It straddles and engages with the annular flange through the slot, so that the moving block 3 can slide along the circumferential direction of the annular flange and is constrained in the radial and axial directions. A fitting groove 18 for placing the bevel gear set 1302 is opened on one side of the surface of the moving block 3 with the conversion cavity 10.

[0042] The working principle of the above embodiments is as follows:

[0043] When using the device, the structure on the reference ring 2 and the moving frame 4 is usually removed during normal processing. This is the bevel of the conventional reinforced pipe. Only the positioning ring 1 needs to be used. First, the positioning ring 1 is coaxially sleeved on the end of the pipe to be processed. By rotating the extrusion threaded rod 601, the arc-shaped extrusion block 602 is driven to extend radially until it is tightly attached to the outer wall of the pipe, thereby firmly clamping the entire device on the pipe and forming a reference plane for processing.

[0044] When the power motor 14 is started, the connecting gear 15 at its output end meshes with the crown gear 16 fixed on the positioning ring 1. Since the crown gear 16 is fixed, according to the gear meshing principle, the connecting gear 15 will drive the entire moving block 3 and the tool holder 12 to slide circumferentially along the annular flange on the positioning ring 1. At this time, the grinding head structure revolves around the pipe, and then the beveling process begins. During the pipe processing, the operator adjusts the grinding head in advance, which is also a common operating method.

[0045] While the moving block 3 moves circumferentially, the motor power is converted and transmitted to the grinding head through the conversion component 11. The connecting external gear ring 1103 fixed on the positioning ring 1 meshes with the conversion gear 1102 through the meshing port 1104. When the moving block 3 moves circumferentially with the conversion gear 1102, the meshing with the fixed gear ring will force the conversion gear 1102 to rotate. This rotation is transmitted to the bevel gear set 1302 through the connecting shaft 1101, the magnetic coupling 1105 and the combination rod 1106, which ultimately drives the connecting tool bar 1301 and the diamond cone grinding head 1303 installed at its end to rotate at high speed. This is the rotation of the grinding head itself, which provides cutting power.

[0046] When secondary adjustments to the pipeline are required, the movable frame 4, adjusting screw 7, and trapezoidal block 8 work together to complete the adjustment. During the adjustment, the reference ring 2 needs to be installed on a pipeline, and the trapezoidal block 8 on the adjacent adjusting screw 7 is used to fit the pipeline. In this way, the adjusting screw 7 adjacent to the positioning ring 1 will be adjusted according to the adjusting screw 7 of the reference ring 2, thereby ensuring the accuracy of the connection position of the two pipelines and facilitating subsequent welding and fixing. This device will be used in conjunction with lubricating fluid during the grinding process, and the addition and use of lubricating fluid is a mature existing technology, which will not be elaborated on in this application.

[0047] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

Claims

1. A pipe beveling and grinding device for on-site construction, comprising a positioning ring (1) and a reference ring (2) disposed on one side of the positioning ring (1), characterized in that: The positioning ring (1) and the reference ring (2) are both slidably mounted with moving blocks (3). The two moving blocks (3) are fixedly mounted with a moving frame (4) on opposite sides. The positioning ring (1) and the reference ring (2) are both provided with several telescopic openings (5) at equal intervals. The inner walls of the telescopic openings (5) are provided with extrusion components (6). The inner wall of the moving frame (4) is movably mounted with two adjusting screws (7). The lower end of the adjusting screws (7) is fixedly mounted with a trapezoidal block (8). The adjusting screws (7) are threadedly connected to fastening blocks (9) on the upper and lower sides of the moving frame (4). A conversion cavity (10) is provided on the inner wall of the moving block (3) located on one side of the positioning ring (1), and a conversion component (11) is provided inside the conversion cavity (10). A tool holder (12) is fixedly installed on one side of the surface of the moving block (3) with the conversion cavity (10), and a grinding component (13) is provided inside the tool holder (12). A pad block (17) is fixedly installed on the side of the moving block (3) with the conversion cavity (10) away from the tool holder (12). A power motor (14) is fixedly installed on the surface of the pad block (17), and a connecting gear (15) is fixedly installed at the output end of the power motor (14). A crown gear (16) is meshed on the surface of the connecting gear (15). The conversion assembly (11) includes a connecting shaft (1101) rotatably mounted on one side of the inner wall of the conversion cavity (10), and a conversion gear (1102) is fixedly mounted on the side of the connecting shaft (1101) near the power motor (14), and a connecting external gear ring (1103) is embedded in the surface of the positioning ring (1). The inner wall of the conversion cavity (10) is provided with a meshing port (1104) on the side of the conversion gear (1102), and the surface of the connecting external gear ring (1103) extends to the conversion cavity (10) through the meshing port (1104) and meshes with the surface of the conversion gear (1102). A magnetic coupling (1105) is provided at the end of the connecting shaft (1101) away from the conversion gear (1102), and a combination rod (1106) is fixedly mounted on the side of the magnetic coupling (1105) away from the connecting shaft (1101). The grinding assembly (13) includes a connecting tool bar (1301) rotatably mounted inside the tool holder (12), and a bevel gear set (1302) is mounted on the end of the connecting tool bar (1301) near the conversion cavity (10). The bevel gear set (1302) is connected to the end of the combination rod (1106) for transmission. A diamond conical grinding head (1303) is fixedly mounted on the end of the connecting tool bar (1301) away from the conversion cavity (10). The inner wall of the extrusion assembly (6) is threaded with an extrusion thread rod (601), and an arc-shaped extrusion block (602) is rotatably installed at one end of the extrusion thread rod (601). The inner walls of the positioning ring (1) and the reference ring (2) are provided with a storage groove (603) on one side of the corresponding arc-shaped extrusion block (602).

2. The pipe beveling and grinding device for on-site construction according to claim 1, characterized in that: One end of the combined rod (1106) extends through to the surface of the movable block (3), while the connecting shaft (1101) is rotatably mounted with a support block (11011) between the conversion gear (1102) and the magnetic coupling (1105), and the end of the support block (11011) is fixedly connected to one side of the inner wall of the conversion cavity (10).

3. The pipe beveling and grinding device for on-site construction according to claim 1, characterized in that: On the outer cylindrical surfaces of the positioning ring (1) and the reference ring (2), there is an integral annular flange that surrounds the entire circumference, and the telescopic port (5) is located at the center of the annular flange. The surface of the crown gear (16) is fixedly connected to the surface of the positioning ring (1), and the connecting external tooth ring (1103) is located on one side of the annular flange of the positioning ring (1).

4. The pipe beveling and grinding device for on-site construction according to claim 1, characterized in that: The movable block (3) is provided with a slot that matches the contour of the annular flange. It straddles and engages with the annular flange through the slot, so that the movable block (3) can slide along the circumferential direction of the annular flange and is constrained in the radial and axial directions.

5. The pipe beveling and grinding device for on-site construction according to claim 1, characterized in that: The moving block (3) with the conversion cavity (10) has a fitting slot (18) on one side of its surface for placing the bevel gear set (1302).

6. The pipe beveling and grinding device for on-site construction according to claim 1, characterized in that: The output shaft wall of the power motor (14) is rotatably mounted with an L-shaped reinforcing block (1401), and the surface of the L-shaped reinforcing block (1401) is fixedly connected to the surface of the pad block (17).

7. The pipe beveling and grinding device for on-site construction according to claim 1, characterized in that: A battery (19) is embedded in the upper side of the movable block (3) with the conversion cavity (10).

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