Pipe bending equipment for floor heating pipe installation

Abstract

The invention relates to the technical field of pipe bending equipment, in particular to pipe bending equipment for floor heating pipe installation, which comprises a processing seat, two L-shaped guide rails are fixedly connected to the top of the processing seat, and a hydraulic cylinder is fixedly connected to the left side of the processing seat. The right end of a telescopic rod of the hydraulic cylinder is fixedly connected with a limiting mechanism used for bending the bent pipe. According to the pipe bending equipment for floor heating pipe installation, a floor heating pipe is placed on a rubber strip, a hydraulic cylinder drives a rectangular frame and gear blocks to move rightwards, at the moment, the gear block on the rear side drives a second gear and a round sleeve to rotate anticlockwise, and a plurality of gear blocks on the front side drive a first gear and a round rod to rotate clockwise; the two connecting plates and the two limiting blocks are driven by the round rod and the round sleeve to rotate with the round rod as the circle center, extrusion force is applied to the floor heating pipe through the two limiting blocks, the floor heating pipe can be rapidly bent through limiting of the round rod, then the fatigue of workers when the floor heating pipe is bent is reduced, and the bending time of the multiple floor heating pipes is shortened.

Description

Technical Field

[0001] This invention relates to the field of pipe bending equipment technology, specifically a pipe bending device for installing underfloor heating pipes. Background Technology

[0002] In the precise and meticulous installation of underfloor heating systems, the underfloor heating pipes are like the "blood vessels" of the system. They need to be precisely bent and shaped according to the unique contours of the building structure, the layout of the interior furnishings, and the final circulation path requirements. Faced with complex room layouts, fixed facilities on the ground, or areas that need to be avoided, straight pipes often cannot directly meet the installation requirements. At this time, underfloor heating pipe bending equipment becomes an indispensable professional tool in the hands of installation engineers. Its core value lies in providing a strong guarantee for the safe, accurate, and fluid dynamic bending of the pipes.

[0003] Currently, when bending underfloor heating pipes, in order to adapt to the space constraints of the construction site and improve the flexibility of the operation, construction workers usually choose to use portable manual pipe bending machines to complete this operation. However, when the underfloor heating pipes are placed into the pipe bending machine and bending begins, due to the difference in diameter of different pipes, a larger bending force is required when bending pipes with larger diameters. After bending multiple underfloor heating pipes, the workers are quite tired, making it time-consuming to bend multiple underfloor heating pipes.

[0004] In view of this, we propose a pipe bending device for the installation of underfloor heating pipes. Summary of the Invention

[0005] The purpose of this invention is to provide a pipe bending device for installing underfloor heating pipes, to solve the problem mentioned in the background art where, when underfloor heating pipes are placed into a pipe bending machine and bending begins, the different diameters of the pipes lead to the need for greater bending force when bending larger diameter pipes, resulting in worker fatigue after bending multiple pipes and making the bending of multiple pipes time-consuming. To achieve the above objective, this invention provides the following technical solution: a pipe bending device for installing underfloor heating pipes, including a processing base. Two L-shaped guide rails are fixedly connected to the top of the processing base. A hydraulic cylinder is fixedly connected to the left side of the processing base. A limiting mechanism for bending the pipe is fixedly connected to the right end of the telescopic rod of the hydraulic cylinder. An arc-shaped frame is fixedly connected to the front side of the top surface of the processing base. Arc-shaped grooves are formed on both the front and rear sides of the inner wall of the arc-shaped frame. An arc-shaped rack is slidably connected inside the arc-shaped grooves. An adjustment mechanism for changing the bending angle of the pipe is rotatably connected to the middle of the bottom surface of the inner wall of the arc-shaped frame.

[0006] Preferably, the limiting mechanism includes a rectangular frame that is slidably connected inside two L-shaped guide rails. Several toothed blocks are fixedly connected to both the front and rear sides of the inner wall of the rectangular frame. Several toothed blocks located on the rear side are fixedly connected to the upper side of the rear side of the inner wall of the rectangular frame at equal distances in a straight line, and several toothed blocks located on the front side are fixedly connected to the lower side of the front side of the inner wall of the rectangular frame at equal distances in a straight line. A round rod is rotatably connected to the center of the top surface of the machining seat. When the rectangular frame slides in the L-shaped guide rails, the toothed blocks arranged in a staggered manner and at equal distances in a straight line on its surface precisely mesh with the first gear and the second gear. When the rectangular frame moves, the upper row of toothed blocks on the rear side drives the second gear and the round sleeve to rotate counterclockwise, and the lower row of toothed blocks on the front side drives the first gear and the round rod to rotate clockwise. This unique staggered meshing design efficiently and reliably converts the unidirectional linear motion of the rectangular frame into the synchronous reverse rotational motion of the round rod and the round sleeve, providing a stable and directionally controllable power input for subsequent bending actions.

[0007] Preferably, a first gear is fixedly sleeved on the lower side of the round rod, a round sleeve is movably sleeved on the side of the round rod, and a second gear is fixedly sleeved on the side of the round sleeve. The first gear meshes with several toothed blocks located on the front side, and the second gear meshes with several toothed blocks located on the rear side. The connecting plates and the limiting blocks at the top of the round rod and the round sleeve, respectively, rotate symmetrically in opposite directions under the drive of the gears. The cross groove, cross bar, compression spring, and pressure plate structure inside the limiting block constitute a built-in elastic buffer system. When the pressure plate applies bending force to the underfloor heating pipe, the compression spring can automatically compress according to the resistance, so that the applied pressure changes from rigid to flexible.

[0008] Preferably, a connecting plate is fixedly connected to the upper side of both the circular sleeve and the circular rod. A limiting block is fixedly connected to the top of the connecting plate. A cross groove is formed inside the limiting block. A cross bar is slidably connected inside the cross groove. A compression spring is fixedly connected to the top of the cross bar. The top of the compression spring is fixedly connected to the upper side of the inner wall of the cross groove. A pressure plate is fixedly connected to the front side of the vertical bar of the cross bar. A rubber strip is fixedly connected to the top of each connecting plate. The height of the rubber strip on the left side is the same as the height of the rubber strip on the right side. The rubber strips fixedly set on the top of the connecting plate are strictly kept at the same horizontal level, providing a flat, stable and frictional initial support platform for the underfloor heating pipe to be bent. The rubber material not only protects the surface of the pipe from scratches, but its inherent coefficient of friction can also effectively prevent the pipe from slipping or rolling in the initial stage of bending, ensuring the accuracy and stability of the bending start position.

[0009] Preferably, the adjusting mechanism has a long rod rotatably connected to the middle of the bottom surface of the inner wall of the arc-shaped frame. A circular plate is fixedly connected to the top of the long rod, and several slots are provided on the side of the circular plate. The slots are equidistantly arranged in a ring on the side of the circular plate. An L-shaped insert is fixedly connected to the upper side of the front of the arc-shaped frame. The L-shaped insert, pre-tensioned by a tension spring, cooperates with the equally spaced slots on the side of the circular plate to achieve quick unlocking, indexing adjustment, and stable locking of the rotation angle of the long rod. Rotating the circular plate drives the third gear at the lower end of the long rod, which in turn drives the two meshing arc-shaped racks and the connected T-shaped limiting rod to move precisely along the arc-shaped groove trajectory. This allows the two limiting blocks fixed at the top of the T-shaped limiting rod to be conveniently set to different opening positions on the left and right sides according to the bending requirements.

[0010] Preferably, the rear side of the horizontal bar of the L-shaped insert extends through the interior of the arc-shaped frame and slides into the interior of one of the slots. A tension spring is fixedly connected to the rear side of the vertical bar of the L-shaped insert, and the rear end of the tension spring is fixedly connected to the front side of the arc-shaped frame.

[0011] Preferably, a third gear is fixedly sleeved on the lower side of the long rod. The third gear meshes with two arc-shaped racks respectively. T-shaped limiting rods are fixedly connected to the right side of the rear arc-shaped rack and the left side of the front arc-shaped rack. The side of the horizontal bar of the T-shaped limiting rod slides in cooperation with the side of the inner wall of the arc-shaped groove. The top of the vertical bar of the T-shaped limiting rod extends to the top of the arc-shaped frame and is fixedly connected to a limiting block. The horizontal bar of the T-shaped limiting rod is strictly constrained to slide within the arc-shaped groove, ensuring that the trajectory of the limiting block movement is accurate and without shaking. When the position of the limiting block is set, its robust structure and stable positioning can provide reliable side blocking and limiting support during the bending process of the underfloor heating pipe, enabling the realization of complex bending shapes.

[0012] Preferably, both sides of the front vertical bar of the cross bar are fixedly connected with reinforcing inclined plates, and one side of the reinforcing inclined plate is fixedly connected to the rear side of the pressure plate. The addition of reinforcing inclined plates on both sides of the front vertical bar of the cross bar and their firm connection to the rear side of the pressure plate significantly enhances the overall rigidity and bending resistance of the area where the pressure plate and the cross bar are connected.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] In this invention, by placing the underfloor heating pipe on two rubber strips, a hydraulic cylinder drives a rectangular frame and its toothed blocks to move to the right. At this time, the rear toothed blocks drive the second gear and the circular sleeve to rotate counterclockwise, while several front toothed blocks drive the first gear and the circular rod to rotate clockwise. The circular rod and the circular sleeve drive two connecting plates and two limiting blocks to rotate around the circular rod as the center. The two limiting blocks apply pressure to the underfloor heating pipe, and the circular rod limits the movement of the pipe, thus allowing for rapid bending of the underfloor heating pipe. This reduces the fatigue of workers when bending the pipe and reduces the time required to bend multiple pipes.

[0015] In this invention, by moving the L-shaped insert forward, the tension spring is stretched, releasing the restriction on the circular plate. The circular plate drives the long rod and the third gear to rotate, causing the two arc-shaped racks to drive the T-shaped limiting rod to open to the left and right sides simultaneously, releasing the L-shaped insert. The L-shaped insert is then reset into the appropriate slot by the tension spring, thereby fixing the circular plate, the long rod, and the third gear. This allows the underfloor heating pipe to contact the sides of the two limiting blocks during a single bend, facilitating multiple bends of the underfloor heating pipe.

[0016] In this invention, by placing the underfloor heating pipe on the rubber strip, the two cross strips are moved to the upper side of the inner wall of the cross groove, causing the pressure plate to move upward and compressing the pressure spring. The underfloor heating pipe is then placed below the pressure plate. The pressure spring is then released, allowing the cross strips to drive the pressure plate downward through the pressure spring to reset. This quickly limits the position of the underfloor heating pipe and reduces the possibility of the underfloor heating pipe shifting when bent. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a three-dimensional structural unfolded view of the limiting mechanism of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the rectangular frame of the present invention;

[0021] Figure 5 This is a partial three-dimensional structural development view of the limiting mechanism of the present invention;

[0022] Figure 6 This is a partial three-dimensional structural diagram of the pressure plate of the present invention;

[0023] Figure 7 This is a three-dimensional structural diagram of the arc-shaped frame of the present invention;

[0024] Figure 8 This is a partial three-dimensional cross-sectional view of the arc-shaped frame of the present invention;

[0025] Figure 9 This is a three-dimensional structural diagram of the adjustment mechanism of the present invention;

[0026] Figure 10 This is a three-dimensional structural unfolded view of the adjustment mechanism of the present invention.

[0027] In the diagram: 1. Machining base; 2. L-shaped guide rail; 3. Hydraulic cylinder; 4. Limiting mechanism; 401. Rectangular frame; 402. Tooth block; 403. Round rod; 404. First gear; 405. Round sleeve; 406. Connecting plate; 407. Limiting block; 408. Cross groove; 409. Cross bar; 4010. Compression spring; 4011. Pressure plate; 4012. Rubber strip; 4013. Reinforcing inclined plate; 4014. Second gear; 5. Arc frame; 6. Arc groove; 7. Arc rack; 701. T-shaped limiting rod; 702. Limiting block; 8. Adjusting mechanism; 801. Long rod; 802. Round plate; 803. Slot; 804. L-shaped insert; 805. Tension spring; 806. Third gear. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1 to 10 The present invention provides a technical solution: a pipe bending device for installing underfloor heating pipes, including a processing base 1, two L-shaped guide rails 2 fixedly connected to the top of the processing base 1, a hydraulic cylinder 3 fixedly connected to the left side of the processing base 1, a limiting mechanism 4 for bending the pipe fixedly connected to the right end of the telescopic rod of the hydraulic cylinder 3, an arc frame 5 fixedly connected to the front side of the top surface of the processing base 1, arc grooves 6 are provided on both the front and rear sides of the inner wall of the arc frame 5, an arc rack 7 is slidably connected inside the arc groove 6, and an adjustment mechanism 8 for changing the bending angle of the pipe is rotatably connected to the middle of the bottom surface of the inner wall of the arc frame 5.

[0030] Example 1:

[0031] Please see Figures 1 to 10 This embodiment provides a technical solution:

[0032] The limiting mechanism 4 includes a rectangular frame 401, which is slidably connected inside two L-shaped guide rails 2. Several toothed blocks 402 are fixedly connected to the front and rear sides of the inner wall of the rectangular frame 401. Several toothed blocks 402 located on the rear side are fixedly connected to the upper side of the rear side of the inner wall of the rectangular frame 401 at equal distances in a straight line, and several toothed blocks 402 located on the front side are fixedly connected to the lower side of the front side of the inner wall of the rectangular frame 401 at equal distances in a straight line. A round rod 403 is rotatably connected to the middle of the top surface of the processing base 1.

[0033] A first gear 404 is fixedly sleeved on the lower side of the side of the round rod 403, a round sleeve 405 is movably sleeved on the side of the round rod 403, and a second gear 4014 is fixedly sleeved on the side of the round sleeve 405. The first gear 404 meshes with several tooth blocks 402 located on the front side, and the second gear 4014 meshes with several tooth blocks 402 located on the rear side.

[0034] In this embodiment, when the hydraulic cylinder 3 extends and retracts, it drives the rectangular frame 401 and several toothed blocks 402 inside to move to the right, causing the rear toothed block 402 to drive the second gear 4014 to rotate, and the front toothed blocks 402 to drive the first gear 404 to rotate, causing the round rod 403 to drive the connecting plate 406 on its side to deflect clockwise, while the round sleeve 405 drives the connecting plate 406 on its side to deflect counterclockwise, causing the two limiting blocks 407 to deflect forward in an arc at the same time. At this time, the round rod 403 limits the area where the floor heating pipe needs to be bent, so that the two moving limiting blocks 407 can bend the floor heating pipe.

[0035] Example 2:

[0036] Please see Figures 1 to 10 This embodiment provides a technical solution:

[0037] A connecting plate 406 is fixedly connected to the upper side of both the round sleeve 405 and the round rod 403. A limiting block 407 is fixedly connected to the top of the connecting plate 406. A cross groove 408 is opened inside the limiting block 407. A cross bar 409 is slidably connected inside the cross groove 408. A compression spring 4010 is fixedly connected to the top of the cross bar 409. The top of the compression spring 4010 is fixedly connected to the upper side of the inner wall of the cross groove 408. A pressure plate 4011 is fixedly connected to the front side of the vertical bar of the cross bar 409. A rubber strip 4012 is fixedly connected to the top of both the connecting plate 406. The height of the left rubber strip 4012 is on the same horizontal plane as the height of the right rubber strip 4012.

[0038] Both sides of the front vertical bar of the cross bar 409 are fixedly connected to the reinforcing inclined plate 4013, and one side of the reinforcing inclined plate 4013 is fixedly connected to the rear side of the pressure plate 4011.

[0039] In this embodiment, after the floor heating pipe that needs to be bent is placed on the upper side of the two rubber strips 4012, the floor heating pipe can be placed on a horizontal surface. At the same time, the two cross strips 409 drive the two pressure plates 4011 to move upward, compressing the compression spring 4010. Meanwhile, the floor heating pipe is placed below the pressure plate 4011. At this time, the cross strips 409 are released, and the cross strips 409 move downward along the cross groove 408 by the rebound force of the compression spring 4010. At this time, the pressure plate 4011 can clamp and limit the floor heating pipe.

[0040] Example 3:

[0041] Please see Figures 1 to 10 This embodiment provides a technical solution:

[0042] The adjusting mechanism 8 has a long rod 801, which is rotatably connected to the middle of the bottom surface of the inner wall of the arc frame 5. A circular plate 802 is fixedly connected to the top of the long rod 801. Several slots 803 are opened on the side of the circular plate 802. Several slots 803 are equally spaced and arranged in a ring on the side of the circular plate 802. An L-shaped insert 804 is fixedly connected to the upper side of the front side of the arc frame 5.

[0043] The rear side of the horizontal bar of the L-shaped insert 804 passes through the interior of the arc frame 5 and slides into the interior of one of the slots 803. A tension spring 805 is fixedly connected to the rear side of the vertical bar of the L-shaped insert 804, and the rear end of the tension spring 805 is fixedly connected to the front side of the arc frame 5.

[0044] A third gear 806 is fixedly sleeved on the lower side of the long rod 801. The third gear 806 meshes with two arc-shaped racks 7 respectively. T-shaped limiting rods 701 are fixedly connected to the right side of the rear arc-shaped rack 7 and the left side of the front arc-shaped rack 7. The side of the horizontal bar of the T-shaped limiting rod 701 slides with the side of the inner wall of the arc-shaped groove 6. The top of the vertical bar of the T-shaped limiting rod 701 extends to the top of the arc-shaped frame 5 and is fixedly connected to a limiting block 702.

[0045] In this embodiment, by stretching the L-shaped insert 804 forward, the fixing of the circular plate 802 is released, and the circular plate 802 is rotated through the long rod 801 and the third gear 806 on its side. This causes the two arc-shaped racks 7 to drive the two T-shaped limiting rods 701 to open to the left and right sides respectively. Then, the horizontal bar of the L-shaped insert 804 is moved into the interior of the appropriate slot 803, which fixes the circular plate 802 and the third gear 806. At this time, the two T-shaped limiting rods 701 and the limiting block 702 can be fixed, which makes it convenient to bend the underfloor heating pipe to different angles.

[0046] The method of use and advantages of this invention: The working process of this pipe bending device for installing underfloor heating pipes is as follows:

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, the equipment is first placed at the location where the underfloor heating pipe needs to be bent. Then, the underfloor heating pipe is placed on the upper side of the two rubber strips 4012. At this time, the telescopic rod of the hydraulic cylinder 3 drives the rectangular frame 401 and its internal toothed block 402 to move to the right. At this time, the rear toothed block 402 drives the second gear 4014 and the round sleeve 405 to rotate counterclockwise. Several front toothed blocks 402 drive the first gear 404 and the round rod 403 to rotate clockwise. Then, the round rod 403 and the round sleeve 405 drive the two limiting blocks 407 to rotate around the round rod 403 through the connecting plate 406 on its side. The two limiting blocks 407 apply pressure to the underfloor heating pipe through their sides. By limiting the round rod 403, the underfloor heating pipe can be bent quickly, thereby reducing the fatigue of the workers when bending the underfloor heating pipe and reducing the time for bending multiple underfloor heating pipes.

[0048] By moving the L-shaped insert 804 forward, the tension spring 805 is stretched, causing the horizontal bar of the L-shaped insert 804 to move out of the slot 803, releasing the restriction on the circular plate 802. The circular plate 802 drives the long rod 801 and the third gear 806 on its side to rotate, causing the rotating third gear 806 to drive the T-shaped limiting rod 701 to open to the left and right sides simultaneously through the two arc racks 7. Then, the L-shaped insert 804 is released, allowing the L-shaped insert 804 to return to the appropriate slot 803 through the rebound force of the tension spring 805, thereby fixing the circular plate 802, the long rod 801 and the third gear 806. This allows the floor heating pipe to contact the sides of the two limiting blocks 702 during a single bend, facilitating multiple bends of the floor heating pipe.

[0049] By placing the underfloor heating pipe on the upper side of the rubber strip 4012, the two cross strips 409 are moved to the upper side of the inner wall of the cross groove 408, causing the pressure plate 4011 to move upward and compress the pressure spring 4010. Then, the underfloor heating pipe is placed below the pressure plate 4011, and the pressure spring 4010 is released. The cross strips 409 are then pushed downward by the rebound force of the pressure spring 4010 to reset the pressure plate 4011. This quickly limits the underfloor heating pipe and reduces the possibility of the underfloor heating pipe deviating when bending.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe bending device for installing underfloor heating pipes, comprising a processing base (1), wherein two L-shaped guide rails (2) are fixedly connected to the top of the processing base (1), characterized in that: A hydraulic cylinder (3) is fixedly connected to the left side of the processing seat (1). A limiting mechanism (4) for bending the pipe is fixedly connected to the right end of the telescopic rod of the hydraulic cylinder (3). An arc frame (5) is fixedly connected to the front side of the top surface of the processing seat (1). Arc grooves (6) are provided on both the front and rear sides of the inner wall of the arc frame (5). An arc rack (7) is slidably connected inside the arc groove (6). An adjustment mechanism (8) for changing the bending angle of the pipe is rotatably connected to the middle of the bottom surface of the inner wall of the arc frame (5).

2. The pipe bending device for installing underfloor heating pipes according to claim 1, characterized in that: The limiting mechanism (4) includes a rectangular frame (401), which is slidably connected inside two L-shaped guide rails (2). Several toothed blocks (402) are fixedly connected to the front and rear sides of the inner wall of the rectangular frame (401). Several toothed blocks (402) located on the rear side are fixedly connected to the upper side of the rear side of the inner wall of the rectangular frame (401) at equal distances in a straight line. Several toothed blocks (402) located on the front side are fixedly connected to the lower side of the front side of the inner wall of the rectangular frame (401) at equal distances in a straight line. A round rod (403) is rotatably connected to the middle of the top surface of the processing seat (1).

3. A pipe bending device for installing underfloor heating pipes according to claim 2, characterized in that: A first gear (404) is fixedly sleeved on the lower side of the round rod (403), a round sleeve (405) is movably sleeved on the side of the round rod (403), and a second gear (4014) is fixedly sleeved on the side of the round sleeve (405). The first gear (404) meshes with several tooth blocks (402) located on the front side, and the second gear (4014) meshes with several tooth blocks (402) located on the rear side.

4. A pipe bending device for installing underfloor heating pipes according to claim 3, characterized in that: A connecting plate (406) is fixedly connected to the upper side of both the round sleeve (405) and the round rod (403). A limiting block (407) is fixedly connected to the top of the connecting plate (406). A cross groove (408) is opened inside the limiting block (407). A cross bar (409) is slidably connected inside the cross groove (408). A compression spring (4010) is fixedly connected to the top of the cross bar (409). The top of the compression spring (4010) is fixedly connected to the upper side of the inner wall of the cross groove (408). A pressure plate (4011) is fixedly connected to the front side of the vertical bar of the cross bar (409). A rubber strip (4012) is fixedly connected to the top of each connecting plate (406). The height of the rubber strip (4012) on the left side is the same as the height of the rubber strip (4012) on the right side.

5. A pipe bending device for installing underfloor heating pipes according to claim 1, characterized in that: The adjustment mechanism (8) has a long rod (801) which is rotatably connected to the middle of the bottom surface of the inner wall of the arc frame (5). A circular plate (802) is fixedly connected to the top of the long rod (801). Several slots (803) are provided on the side of the circular plate (802). Several slots (803) are equally spaced and arranged in a ring on the side of the circular plate (802). An L-shaped insert (804) is fixedly connected to the upper side of the front of the arc frame (5).

6. A pipe bending device for installing underfloor heating pipes according to claim 5, characterized in that: The rear side of the horizontal bar of the L-shaped insert (804) penetrates the interior of the arc frame (5) and slides into the interior of one of the slots (803) of the plurality of slots (803). A tension spring (805) is fixedly connected to the rear side of the vertical bar of the L-shaped insert (804), and the rear end of the tension spring (805) is fixedly connected to the front side of the arc frame (5).

7. A pipe bending device for installing underfloor heating pipes according to claim 5, characterized in that: A third gear (806) is fixedly sleeved on the lower side of the long rod (801). The third gear (806) meshes with two arc-shaped racks (7). T-shaped limiting rods (701) are fixedly connected to the right side of the arc-shaped rack (7) on the rear side and the left side of the arc-shaped rack (7) on the front side. The side of the horizontal bar of the T-shaped limiting rod (701) slides with the side of the inner wall of the arc-shaped groove (6). The top of the vertical bar of the T-shaped limiting rod (701) extends to the top of the arc-shaped frame (5) and is fixedly connected to a limiting block (702).

8. A pipe bending device for installing underfloor heating pipes according to claim 4, characterized in that: Both sides of the front vertical bar of the cross bar (409) are fixedly connected to the reinforcing inclined plate (4013), and one side of the reinforcing inclined plate (4013) is fixedly connected to the rear side of the pressure plate (4011).

Images