Water and electricity embedded pipeline groove machining device

Abstract

The invention discloses a water and electricity embedded pipeline groove machining device, and relates to the technical field of water and electricity embedded pipeline groove machining, and the water and electricity embedded pipeline groove machining device comprises an erecting unit which comprises a handrail frame, a shaft rod, a plurality of sets of inner clamping pieces, a plurality of sets of outer clamping pieces and an attaching assembly. Through internal and external clamping cooperative work of the wide wheel and the flat wheel, a bidirectional rolling clamping mechanism is formed, and the device can automatically adapt to pipelines with different diameters. The tension spring is arranged between the bent pipe and the clamping rod, and the tensioning piece is in linkage fit with the sliding groove, so that the clamping angle and force can be automatically adjusted according to the change of the outer diameter of the pipeline, and the phenomena of deviation, slipping or instability caused by external force disturbance are effectively prevented while a good attaching state is kept. Besides, a synchronous adjusting mechanism is formed by a screw rod in the tensioning part and a connecting disc, so that an operator can accurately control the attaching force through rotating operation, uniform stress and stable track of a cutter in the groove machining process are ensured, and the groove forming quality is improved.

Description

Technical Field

[0001] The invention relates to a technology for processing the bevel of a pre-buried hydropower pipeline, in particular to a device for processing the bevel of a pre-buried hydropower pipeline. Background Art

[0002] During hydropower construction, pre-embedding waterstop steel casing within shear walls is a critical step, as its installation quality directly impacts the structural waterproofing performance and the reliability of subsequent pipe routing. Because the steel casing must be precisely cut according to the wall thickness before embedding, measurement errors or construction deviations often result in some casing being insufficient in length to meet the requirement of flushness with the formwork at both ends, necessitating on-site welding. Directly welding the casing ends can easily result in incomplete welds and poor fusion, compromising structural strength and waterproofing effectiveness. Therefore, beveling the pipe ends before welding is required.

[0003] For steel casing that has not been pre-buried, a professional beveling machine is typically used to perform standard beveling to ensure the quality of the welded joint. However, when the casing is pre-buried in a concrete wall or steel structure, its position is fixed and conventional beveling equipment cannot be used. Manual beveling is usually the only option, using small handheld grinding tools.

[0004] This method presents multiple challenges. First, it significantly increases operational difficulty, as workers must manually adjust angle and force within a limited space to achieve the desired groove shape and size. Second, because it's difficult to maintain constant pressure and speed during manual operation, the groove quality can be inconsistent, potentially resulting in inconsistent groove angles and significant variations in surface roughness. These issues directly impact the quality of subsequent welding, including weld uniformity, fusion depth, and ultimately joint strength. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the welding process for the pre-buried steel pipe sleeve requires a groove, which is difficult to operate manually with a small handheld grinding tool.

[0006] The above technical problems are solved by the following technical solutions: The present invention proposes a device for processing the grooves of pre-buried hydropower pipelines, which includes a setting unit, including a handrail frame, a shaft fixed in the middle of both sides of the end of the handrail frame, multiple groups of inner clamps hinged to the outside of both ends of the handrail frame, multiple groups of outer clamps fixed at both ends of the shaft, and a fitting component hinged in the middle of the shaft.

[0007] In a preferred embodiment of the hydropower pre-buried pipeline groove processing device of the present invention: the handrail frame includes a U-shaped frame and hinged parts protruding from both sides of the U-shaped frame;

[0008] The axis of the hinge part is fixedly clamped with the shaft rod.

[0009] In a preferred embodiment of the beveling processing device for pre-buried hydropower pipelines of the present invention, the inner clamping member comprises a frame rod hingedly connected to the outer sides of both ends of the hinged portion, a wide wheel hingedly arranged at the bottom of the frame rod, and a clamping rod fixedly arranged on the inner side of the middle of the frame rod;

[0010] And the wide wheel fits on the inner wall of the pipeline.

[0011] In a preferred embodiment of the hydropower pre-buried pipeline bevel processing device of the present invention: the fitting assembly includes a bearing ring hinged on the inner side of the middle of the shaft, a fitting part fixedly arranged at the front end of the bearing ring, a tensioning part slidably connected to the inner side of the fitting part, and a supporting platform fixed at the end of the tensioning part.

[0012] In a preferred embodiment of the beveling processing device for pre-buried hydropower pipelines of the present invention, the outer clamping member includes a fixing ring fixedly sleeved on both ends of the shaft, a bent pipe fixedly sleeved on the inner side of the fixing ring sleeve, and a flat wheel hinged to the end of the bent pipe;

[0013] The flat wheel is attached to the outer wall of the pipeline.

[0014] In a preferred embodiment of the hydropower pre-buried pipeline groove processing device of the present invention: the bent pipe and the inner side of the clamping rod are fixedly connected to a tension spring;

[0015] The tensioning member and the tension spring are respectively hinged in the middle of the clamping rod through a pipe clamp.

[0016] In a preferred embodiment of the hydropower pre-buried pipeline groove processing device of the present invention: the fitting includes a connecting body fixedly connected to one side of the bearing ring, a slide groove passing through the end surfaces of both sides of the connecting body, and a clamping block protruding from the upper end surface of the connecting body.

[0017] In a preferred embodiment of the hydropower pre-buried pipeline beveling processing device of the present invention: the tensioning member includes a connecting head slidably connected to the inner side of the slide groove, two sets of screws respectively hinged on the connecting head and the pipe clamp, and a connecting plate simultaneously threadedly connected to the screws.

[0018] In a preferred embodiment of the hydropower pre-buried pipeline groove processing device of the present invention: the supporting platform includes a profile fixedly clamped on the clamping block, and an angle adjustment plate threadedly connected to the end face of the profile.

[0019] In a preferred embodiment of the hydropower pre-buried pipeline beveling processing device of the present invention, it further comprises a beveling machine threadedly connected to the arc groove of the angle adjustment plate.

[0020] The beneficial effects of the present invention are as follows: the wide wheel and the flat wheel work together to clamp the inside and outside of the device, forming a bidirectional rolling clamping mechanism that can automatically adapt to pipes of different diameters. By setting a tension spring between the bend and the clamping rod, and utilizing the linkage between the tensioner and the slide, the clamping angle and force can be automatically adjusted according to the change in the outer diameter of the pipe, while maintaining a good fit, effectively preventing deviation, slippage or instability caused by external force disturbances. In addition, the screw and the connecting disc in the tensioner constitute a synchronous adjustment mechanism, which allows the operator to achieve precise control of the fitting force through rotation operation, ensuring that the tool is evenly stressed and the trajectory is stable during the groove processing process, thereby improving the groove forming quality and avoiding problems such as inconsistent groove angles and uneven depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0022] Figure 1 The overall structural diagram of the hydropower pre-buried pipeline groove processing device of the present invention is shown;

[0023] Figure 2 A schematic diagram of the structure of the hydropower pre-buried pipeline groove processing device of the present invention is shown;

[0024] Figure 3 The present invention shows Figure 2 A magnified view of the inner clamp structure at point A;

[0025] Figure 4 A schematic diagram of the partial structure of the outer clamp of the present invention is shown;

[0026] Figure 5 shows a schematic structural diagram of the laminating assembly of the present invention;

[0027] Figure 6 A schematic structural diagram of the carrier platform of the present invention is shown. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0029] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0030] Reference Figures 1 to 6 The present embodiment provides a device for processing the grooves of pre-buried hydropower pipelines, including an erection unit 1, a handrail frame 11, a shaft 12 fixed to the middle of both sides of the end of the handrail frame 11, multiple groups of inner clamps 13 hinged to the outer sides of both ends of the handrail frame 11, multiple groups of outer clamps 14 fixed to both ends of the shaft 12, and a fitting component 15 hinged to the middle of the shaft 12.

[0031] In one embodiment provided in the present application, the armrest frame 11 includes a U-shaped frame 111 and hinged portions 112 protruding from both sides of the U-shaped frame;

[0032] The axis of the hinge portion 112 is fixedly engaged with the shaft 12 .

[0033] In this embodiment, the handrail 11 is symmetrically designed, with a U-shaped frame 111 at one end, serving as a grip and pressure point during operation. Two sets of symmetrical hinges 112 extend downward from each end of the U-shaped frame 111. These hinges are located on either side of the U-shaped frame and are fixedly connected to a rotating rod 12 at their axis. When pressure is applied to the rear end of the U-shaped frame 111, the hinges 112 rotate the rotating rod 12, thereby achieving overall adjustment of the device to polish the pipe N.

[0034] Furthermore, if Figure 1 As shown, the rotating rod 12 passes through the hinge portion 112 of the handrail frame 11 and extends a distance from the outside thereof so as to hinge two sets of inner clamps 13 on both sides of the outer end of the hinge portion 112. It is worth noting that although the inner clamps 13 are installed on the rotating rod 12, they do not actively rotate with the rotating rod 12, but are adaptively adjusted and installed according to the specific shape and size of the pipe. In addition, two sets of symmetrically arranged outer clamps 14 are fixedly connected to the rod body of the rotating rod 12 on the inner side of the hinge portion 112. The inner clamps 13 and the outer clamps 14 act on the inner and outer sides of the pipe N respectively, ensuring that the fitting assembly 15 can fit tightly against the pipe N, providing a stable clamping effect, thereby ensuring the accuracy and stability during the groove processing process. The overall structure not only improves the convenience of operation, but also enhances the adaptability of the device to pipes of different specifications.

[0035] In one embodiment provided in the present application, the inner clamping member 13 includes a frame rod 131 hinged to the outer sides of both ends of the hinge portion 112, a wide wheel 132 hingedly arranged at the bottom of the frame rod 131, and a clamping rod 133 fixedly arranged on the middle inner side of the frame rod 131;

[0036] The wide wheel 132 fits the inner wall of the pipe N.

[0037] In one embodiment provided in the present application, the outer clamp 14 includes a fixing ring 141 fixedly sleeved on both ends of the shaft 12, a bent tube 142 fixedly sleeved on the inner side of the sleeve of the fixing ring 141, and a flat wheel 143 hinged to the end of the bent tube 142;

[0038] The flat wheel 143 is attached to the outer wall of the pipe N.

[0039] In this embodiment, the inner clamp 13 can be positioned on the inner wall of the pipe N. The inner clamp 13 comprises a support rod 131 hingedly mounted on the outer sides of the hinge portion 112. The support rod 131 is provided with a rotatable wide wheel 132 at its bottom, which is used to contact the inner wall of the pipe N. The design of the wide wheel 132 not only improves the stability of the contact with the inner wall of the pipe, but also reduces frictional resistance, facilitating the advancement and positioning of the device within the pipe.

[0040] Furthermore, a clamping rod 133 is fixedly connected to the middle position of the two groups of frame rods 131 to provide auxiliary support for the overall structure and to provide a limit for the tensioning of the fitting component 15 and the outer clamp 14, ensuring good concentricity and stability between the device and the pipeline during the groove processing.

[0041] Furthermore, the outer clamp 14 includes a fixing ring 141 fixedly mounted on each end of the shaft 12. A curved tube 142 is connected to the fixing ring 141. The curved tube 142 extends along the outer wall of the pipe and is hingedly connected to a flat wheel 143 at its end. The flat wheel 143 has a larger diameter, which allows it to better conform to the outer wall of the pipe N, improving the stability and guidance performance of the device during operation.

[0042] Preferably, wide wheel 132 is a relatively wide rubber wheel with a smaller diameter, while flat wheel 143 is a relatively narrow rubber wheel with a larger diameter. Wide wheel 132 fits perpendicularly to the inner wall of pipe N. Its larger wheel width enhances clamping while reducing operational resistance caused by sliding friction. Flat wheel 143 is tilted and clamped to the outer wall of pipe N via elbow 142. Its larger diameter allows for better adaptability to the curvature of pipes of varying diameters, thereby enhancing the device's applicability and field operational flexibility.

[0043] In one embodiment provided in the present application, the fitting assembly 15 includes a bearing ring 151 hinged on the middle inner side of the shaft 12, a fitting member 152 fixedly arranged at the front end of the bearing ring 151, a tensioning member 153 slidably connected to the inner side of the fitting member 152, and a supporting platform 154 fixed at the end of the tensioning member 153.

[0044] In this embodiment, Figure 3 and Figure 4 As shown. A bearing ring 151 is inserted into the middle of the shaft 12 through an interference fit. Bearing ring 151 can consist of a bearing and a pipe clamp secured to the outer ring of the bearing. This pipe clamp can be fixedly connected to a fitting 152 perpendicular to the rotating shaft 12. A support platform 154 is fixedly connected to the upper end surface of fitting 152, on which a small beveling machine can be mounted. A tensioning member 153 is slidably connected to the back of fitting 152. One end of tensioning member 153 is hinged to the clamping rod 133, while the other end is slidably connected to the back of fitting 152.

[0045] Preferably, the tensioning member 153 can adjust its length by itself, and then under the limiting action of the clamping rod 133 on one side, it can finally adjust the downward angle of the fitting member 152, so that the fitting member 152 drives the supporting platform 154 to fit more closely to the pipe surface of the pipe N, thereby adjusting the grinding angle of the beveling machine.

[0046] In summary, this device can stably fit the inner and outer walls of the pipe at the same time during the groove processing process, forming a reliable support system, effectively preventing processing deviations caused by eccentricity or slippage, and ensuring the quality of groove forming. It is suitable for the efficient and high-precision groove operation needs in the confined space of pre-buried pipes in hydropower projects.

[0047] Reference Figures 3 to 6 As an optional embodiment, the bent tube 142 and the inner side of the clamping rod 133 are fixedly connected to the tension spring 21;

[0048] The tensioning member 153 and the tension spring 21 are respectively hinged in the middle of the clamping rod 133 through the pipe clamp 22.

[0049] In this embodiment, a tension spring 21 is connected between the inner side of the elbow 142 and the clamping rod 133. This tension spring is hingedly secured by a pipe clamp 22 positioned in the middle of the clamping rod 133, thereby forming an elastic tensioning structure. The tension spring 21 elastically limits the expansion angle between the elbow 142 and the bracket 131, allowing it to automatically adapt to and maintain a stable clamping force when clamping pipes N of varying diameters, preventing displacement or loosening due to external forces.

[0050] Specifically, the curved tubes 142 are stamped arc-shaped structures, one end of which is fixedly connected to the fixing ring 141, and the other end extends downward and is hingedly connected to the flat wheel 143, ensuring that the flat wheel can conform to the outer surface of the pipe N at a certain angle. Two sets of curved tubes 142 are provided, symmetrically arranged on either side of the shaft 12, forming a symmetrical support system with the clamping rod 133 and the frame rod 131. Tension springs 21 are installed in the middle of each set of curved tubes 142 and at corresponding locations on the clamping rod 133, ensuring that the entire clamping mechanism has good adaptability and resilience under load.

[0051] Furthermore, the tension spring 21 is hinged to the center of the clamping rod 133 via a standard pipe clamp 22, facilitating installation, replacement, and preload adjustment. The clamping rod 133 itself is also hinged via a rotating rod 12, allowing the entire device to be folded and stored. Operators simply grasp the rear end of the U-shaped frame 111 and apply pressure to open or close the entire mounting unit 1, making it easy to carry and quickly deploy on-site. This makes it particularly suitable for space-constrained pre-buried casing beveling operations in hydropower projects.

[0052] Preferably, the flat wheel 143 can be equipped with a roller assembly with a built-in drive motor, enabling it to rotate autonomously, thereby driving the entire mounting unit 1 to automatically move along the circumference of the pipe N. This not only significantly improves the efficiency of groove processing and reduces errors caused by manual intervention, but also achieves continuous, uniform, and stable groove cutting operations, improves the surface finish and consistency of the groove, and reduces the workload of subsequent grinding.

[0053] During use, the clamping rod 133 and its bottom straight roller 132 are first placed inside the pipe N. The U-shaped frame 111 is then manually rotated to rotate the rotating rod 12, simultaneously opening the curved pipe 142 and stretching the tension spring 21. At this point, the flat wheel 143 at the end of the curved pipe 142 adheres to and clamps against the outer wall of the pipe N, forming a bidirectional rolling clamping structure with the inner straight roller 132, ensuring stable adhesion to the pipe surface. This structure not only effectively resists vibration and reverse torque generated during the bevel grinding process, but also automatically adjusts the clamping force according to changes in pipe diameter, achieving safe, efficient, and stable on-site bevel processing.

[0054] In summary, the device has excellent folding and storage capabilities. Operators only need to hold the rear end of the U-shaped frame 111 to unfold or fold the device, making it easy to carry and quickly deploy. It is particularly suitable for pre-buried casing groove operations in shear walls, beam-column joints, and other locations in hydropower projects where space is limited and operation is inconvenient.

[0055] Reference Figures 3 to 6As an optional embodiment, the fitting 152 includes a connecting body 1521 fixedly connected to one side of the bearing ring 151, a sliding groove 1522 passing through the end surfaces of both sides of the connecting body 1521, and a clamping block 1523 protruding from the upper end surface of the connecting body 1521.

[0056] In one embodiment provided in the present application, the tensioning member 153 includes a connecting head 1531 slidably connected to the inner side of the slide groove 1522, two sets of screws 1532 respectively hinged on the connecting head 1531 and the pipe clamp 22, and a connecting plate 1533 threadedly connected to the screws 1532.

[0057] In one embodiment provided in the present application, the supporting platform 154 includes a profile 1541 fixedly clamped on the clamping block 1523 , and an angle adjustment plate 1542 threadedly connected to the end surface of the profile 1541 .

[0058] In one embodiment provided in the present application, a beveling machine 31 is also included that is threadedly connected to the arc groove of the angle adjustment plate 1542 .

[0059] In this embodiment, Figure 5 As shown. The fitting 152 includes a connecting body 1521 fixedly connected to one side of the bearing ring 151. The connecting body 1521 serves as the core bearing structure of the entire fitting assembly and has good rigidity and structural stability. Slide grooves 1522 are provided on both sides thereof. The slide grooves 1522 are provided along the end faces on both sides of the connecting body 1521 to provide a guide channel and displacement space for the tensioning member 153, so that it can achieve adaptive adjustment according to the actual change in the outer diameter of the pipe. In addition, three groups of clamping blocks 1523 are convexly provided on the upper end face of the connecting body 1521. These clamping blocks are not only used to support the supporting platform 154 to be installed subsequently, but also play a role in limiting and positioning, ensuring that the beveling machine 31 maintains a stable posture during operation to avoid affecting the processing accuracy due to offset or shaking.

[0060] Furthermore, if Figure 5As shown. The tensioning member 153 includes a connector 1531 that is slidably connected to the slide groove 1522. The connector 1531 can move freely along the slide groove 1522 and is hinged to the pipe clamp 22 and the connecting plate 1533 respectively through two sets of symmetrically arranged screws 1532. Among them, one end of one screw 1532 is hinged to the connector 1531, and the other screw 1532 is fixedly connected to the pipe clamp 22. The screw portions of the two sets of screws 1532 are arranged adjacent to each other, so that the connecting plate 1533 can be screwed into the two screws 1532 at the upper and lower ends at the same time. Through the rotation operation, the position of the connector 1531 and the length of the entire tensioning member 153 can be adjusted synchronously, thereby changing the support angle between the fitting member 152 and the clamping rod 133, and finally adjusting the fitting force between the support platform 154 and the pipe N. This design not only improves the device's compatibility with pipes of different diameters, but also enhances controllability and safety during on-site construction. It is particularly suitable for complex scenarios in hydropower projects where embedded steel casings vary in size and have large installation deviations.

[0061] In a preferred embodiment of the present application, the supporting platform 154 includes a profile 1541 that is clamped and fixed on the clamping block 1523. The profile is made of a high-strength lightweight metal material, such as an aluminum profile, which takes into account both strength and portability. One end of the profile 1541 is equipped with an angle adjustment plate 1542 by a threaded connection. The adjustment plate is provided with an arc-shaped adjustment groove, which allows the operator to flexibly adjust and lock according to the required groove angle, thereby achieving groove processing requirements under multiple angles and multiple working conditions. The design of the angle adjustment plate 1542 not only improves the scope of application of groove operations, but also enhances the adaptability of the device to complex environments on the construction site, such as tilted walls, misaligned sleeves, etc.

[0062] In a preferred embodiment of the present application, the beveling machine 31 is fixed to the arc groove of the angle adjustment plate 1542 by a threaded connection, forming a stable and detachable installation structure. This connection method is convenient for quick replacement of tools and maintenance of equipment on site, and also supports the interchangeable use of beveling machines of different specifications, thereby improving equipment utilization. In actual application, the beveling machine 31 is attached to the surface of the pipe N fixed in the concrete layer M together with the mounting unit 1, and maintains a stable cutting posture under the coordinated action of the tension spring 21, the straight roller 132 and the flat wheel 143. If the flat wheel 143 is configured as an intelligent roller driven by a built-in motor, it can drive the entire device to automatically operate along the circumferential direction of the pipe, thereby achieving a continuous, efficient and uniform beveling processing effect.

[0063] In addition, the entire fitting assembly 15 also includes a set of auxiliary support and tensioning adjustment systems. Through the linkage of the tension spring 21 and the tensioning member 153, the device can automatically maintain the optimal fitting state under various working conditions. Specifically, the tension spring 21 is hinged to the middle part of the clamping rod 133 through the pipe clamp 22, and the two ends are respectively connected to the bent pipe 142 and the frame rod 131 to form an elastic return mechanism. When encountering pipes with different outer diameters, the tension spring 21 can automatically expand and contract according to the force conditions, thereby adjusting the expansion angle between the inner and outer clamping structures to achieve adaptive clamping. This flexible adjustment mechanism not only improves the stability during the groove processing process, but also helps to reduce the difficulty of manual operation and improve construction efficiency.

[0064] In summary, the wide wheel 132 and the flat wheel 143 of this device work together to clamp inside and outside, forming a bidirectional rolling clamping mechanism that can automatically adapt to pipes N of different diameters fixed in the concrete layer M. By setting a tension spring 21 between the elbow 142 and the clamping rod 133, and utilizing the linkage between the tensioning member 153 and the slide 1522, the clamping angle and force can be automatically adjusted according to the change in the outer diameter of the pipe, while maintaining a good fit, effectively preventing the deviation, slippage or instability caused by external force disturbances. In addition, the screw 1532 and the connecting disk 1533 in the tensioning member 153 constitute a synchronous adjustment mechanism, which allows the operator to achieve precise control of the fitting force through rotation operation, ensuring that the tool is evenly stressed and the trajectory is stable during the groove processing process, thereby improving the groove forming quality and avoiding problems such as inconsistent groove angles and uneven depths.

[0065] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A device for processing grooves of pre-buried hydropower pipelines, characterized by: include, The mounting unit (1) comprises a handrail frame (11), a shaft (12) fixed to the middle of both ends of the handrail frame (11), a plurality of groups of inner clamps (13) hinged to the outer sides of both ends of the handrail frame (11), a plurality of groups of outer clamps (14) fixed to both ends of the shaft (12), and a fitting assembly (15) hinged to the middle of the shaft (12).

2. The beveling processing device for pre-buried hydropower pipelines according to claim 1, characterized in that: The handrail frame (11) includes a U-shaped frame (111) and hinged portions (112) protruding from both sides of the U-shaped frame; The axis of the hinged portion (112) is fixedly engaged with the shaft (12).

3. The beveling processing device for pre-buried hydropower pipelines according to claim 2, characterized in that: The inner clamping member (13) comprises a frame rod (131) hinged to the outer sides of both ends of the hinge portion (112), a wide wheel (132) hingedly arranged at the bottom of the frame rod (131), and a clamping rod (133) fixedly arranged on the inner side of the middle of the frame rod (131); The wide wheel (132) is fitted on the inner wall of the pipe (N).

4. The device for processing grooves of pre-buried hydropower pipelines according to claim 3, characterized in that: The fitting assembly (15) includes a bearing ring (151) hingedly connected to the inner side of the middle of the shaft (12), a fitting member (152) fixedly arranged at the front end of the bearing ring (151), a tensioning member (153) slidably connected to the inner side of the fitting member (152), and a supporting platform (154) fixed to the end of the tensioning member (153).

5. The device for processing grooves of pre-buried hydropower pipelines according to claim 4, characterized in that: The outer clamp (14) comprises a fixing ring (141) fixedly sleeved on both ends of the shaft (12), a bent pipe (142) fixedly sleeved on the inner side of the sleeve of the fixing ring (141), and a flat wheel (143) hinged to the end of the bent pipe (142); The flat wheel (143) is attached to the outer wall of the pipe (N).

6. The device for processing grooves of pre-buried hydropower pipelines according to claim 5, characterized in that: The bent pipe (142) and the inner side of the clamping rod (133) are fixedly connected to the tension spring (21); The tensioning member (153) and the tension spring (21) are respectively hinged in the middle of the clamping rod (133) through a pipe clamp (22).

7. The device for processing grooves of pre-buried hydropower pipelines according to claim 6, characterized in that: The fitting (152) includes a connecting body (1521) fixedly connected to one side of the bearing ring (151), a sliding groove (1522) penetrating the end surfaces of both sides of the connecting body (1521), and a clamping block (1523) protruding from the upper end surface of the connecting body (1521).

8. The device for processing grooves of pre-buried hydropower pipelines according to claim 7, characterized in that: The tensioning member (153) includes a connecting head (1531) slidably connected to the inner side of the sliding groove (1522), two sets of screw rods (1532) respectively hinged on the connecting head (1531) and the pipe clamp (22), and a connecting plate (1533) simultaneously threadedly connected to the screw rods (1532).

9. The device for processing grooves of pre-buried hydropower pipelines according to claim 8, characterized in that: The supporting platform (154) comprises a profile (1541) fixedly clamped on the clamping block (1523), and an angle adjustment plate (1542) threadedly connected to the end face of the profile (1541).

10. The device for processing grooves of pre-buried hydropower pipelines according to claim 9, characterized in that: It also includes a beveling machine (31) threadedly connected to the arc groove of the angle adjustment plate (1542).

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