Large-radian elbow positioning device for PVC pipe laying and laying positioning method

Abstract

The invention belongs to the technical field of pipeline supporting and positioning, and particularly relates to a large-radian elbow positioning device for PVC pipe laying and a laying and positioning method.The large-radian elbow positioning device comprises a straight pipe supporting base, a straight pipe positioning support, an elbow support, an external expansion rotating support, a clamping assembly, a straight pipe locking assembly and a bending and positioning assembly; the two sides of the straight pipe positioning support are fixedly connected with the surface of the straight pipe supporting base and the surface of the bent pipe support respectively, the straight pipe locking assembly is connected to the top of the straight pipe positioning support in a threaded mode, and the bent pipe positioning assembly is installed on the top of the bent pipe support. The device is provided with a pointer and an angle scale, the bending angle can be monitored in real time, it is ensured that the position and angle of an elbow meet preset requirements, the straight pipe supporting base and the elbow support are aligned through an infrared transmitter and a receiver, the device can calibrate the laying position and direction of a PVC pipe, meanwhile, gradual bending of the PVC pipe is achieved, and the production efficiency is improved. And the forming quality of the elbow is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline support and positioning, and in particular relates to a large-arc elbow positioning device for laying PVC pipes and a laying positioning method. Background Art

[0002] PVC pipe is a pipe whose main component is plastic. It is widely used in various fields. Usually, PVC pipe is laid in the construction process. According to the different connection positions of the pipe, the PVC pipe needs to be bent in different directions during the laying process. The PVC pipe consists of straight pipe sections and curved pipe sections, and the straight pipe sections and curved pipe sections are connected to each other. This design allows the PVC pipe to be bent into different curvatures as needed to adapt to various complex laying environments.

[0003] After searching, the publication number: CN213236320U discloses a large-arc elbow positioning device for laying PVC pipes. When using the large-arc elbow positioning device for laying PVC pipes, as shown in the figure, the PVC pipe body is first laid according to the use requirements, and it is bent according to the different pipe connection positions. The pipe after bending is located in the bend section. Since the curvature of the bend is large, the damage to the PVC pipe body can be reduced, and it is also convenient for pulling and pulling the PVC pipe body during later maintenance. At the same time, after the PVC pipe body is laid, the PVC pipe bodies laid in parallel can be limited by the positioning mechanism to ensure their stability. The adjacent PVC pipe bodies can be fixed by the positioning clamp, and the PVC pipe body can be sucked by the suction plate on the inner side of the positioning clamp to ensure the stability of the PVC pipe body after being fixed. According to the number of PVC pipe bodies laid, different numbers of fixing plates are spliced ​​and used.

[0004] The above patent is not equipped with measuring and calibration tools during the positioning process, so that the device cannot accurately measure and calibrate the position and angle of the elbow, and is not equipped with components such as clamping or locking pins, so that the traditional device cannot ensure that the elbow will not loosen or move during installation and that the pipeline will maintain the correct position and direction during laying.

[0005] Therefore, a large-arc elbow positioning device and a laying positioning method for PVC pipes are designed to solve the above problems. Summary of the invention

[0006] To solve the problems raised in the above background technology. The present invention provides a large-arc elbow positioning device and a laying positioning method for PVC pipe laying. The above patent is not equipped with measurement and calibration tools during the positioning process, so that the device cannot accurately measure and calibrate the position and angle of the elbow, and is not equipped with components such as clamping or locking pins, so that the traditional device cannot ensure that the elbow will not loosen or move during the installation process and the pipe will maintain the correct position and direction during the laying process.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-arc elbow positioning device for PVC pipe laying, comprising a straight pipe support seat, a straight pipe positioning bracket, a bent pipe bracket, an outward-expanding rotating bracket, a clamping assembly, a straight pipe locking assembly and a bending positioning assembly, wherein the clamping assembly is installed on the top of the straight pipe support seat, the two sides of the straight pipe positioning bracket are respectively fixedly connected to the straight pipe support seat and the surface of the bent pipe bracket, the outward-expanding rotating bracket is rotatably connected to the top of the bent pipe bracket, the straight pipe locking assembly is threadedly connected to the top of the straight pipe positioning bracket, and the bending positioning assembly is installed on the top of the bent pipe bracket;

[0008] The straight pipe support seat is used to support the clamping assembly, and the clamping assembly is used to clamp the straight pipe section of the PVC pipe. The straight pipe positioning bracket is used to support the straight pipe locking assembly, and the straight pipe locking assembly is used to clamp the straight pipe section and maintain stable laying. The bent pipe bracket is used to align the straight pipe locking assembly. The outward-expanding rotating bracket is used to support the bending positioning assembly, and the bending positioning assembly is used to bend the PVC pipe while monitoring the bending angle in real time.

[0009] Preferably, the clamping assembly includes a fixed boss, a pushing cylinder, an arc-shaped support plate and a vertical axis, the fixed boss is fixedly connected to the top of the straight tube support seat, the pushing cylinder is installed in the middle of the top end of the fixed boss, the middle of the protruding end of the arc-shaped support plate is fixedly connected to the output end of the pushing cylinder, and the vertical axis passes through both sides of the arc-shaped support plate and is fixedly connected to the surface of the fixed boss and the straight tube support seat.

[0010] Preferably, the straight tube locking assembly includes a straight tube wrapping disc, a wear-resistant retaining ball, a fixed block and a limit spring, the straight tube wrapping disc is threadedly connected to the top of the straight tube positioning bracket, the wear-resistant retaining ball is movably connected to the inside of the straight tube wrapping disc, the outer side of the fixed block is fixedly connected to the surface of the wear-resistant retaining ball, and the two sides of the limit spring are respectively fixedly connected to the surfaces of the straight tube wrapping disc and the fixed block.

[0011] Preferably, the bending positioning assembly includes a DC motor, a drive shaft, a rotating rod, a limit slider, a rubber abutment rod, a detection part and a bend limit part, the DC motor is installed on the outside of the bend bracket, the drive shaft is fixedly connected to the outside of the output end of the DC motor, the rotating rod is fixedly connected to the middle of the outward-expanding rotating bracket, the limit slider is slidably connected to one side of the outward-expanding rotating bracket, the rubber abutment rod is fixedly connected to the outside of the limit slider, the detection part is installed on one side of the rotating rod, and the bend limit part is fixedly connected to one side of the outward-expanding rotating bracket.

[0012] Preferably, the bending pipe limiting portion includes a hollow bracket, a stepping motor, a bidirectional screw, a movable plate and an arc-shaped clamping plate. The hollow bracket is fixedly connected to the outside of the outward-expanding rotating bracket, the stepping motor is installed on both sides of the hollow bracket, the bidirectional screw is fixedly connected to the outside of the output end of the stepping motor, the movable plate is threadedly sleeved on the outside of the bidirectional screw, and the arc-shaped clamping plate is fixedly connected to the middle of the movable plate and clamped with the surface of the bending pipe of the PVC pipe.

[0013] Preferably, the detection part comprises a pointer and an angle plate, the pointer is welded to a side of the rotating rod away from the outwardly expanding rotating bracket, and the angle plate is fixedly connected to the outer side of the elbow bracket.

[0014] Preferably, an infrared transmitter and an infrared receiver of matching models are also provided on one side of the straight tube support seat and the curved tube support.

[0015] Preferably, one end of the driving shaft and the rotating rod are also sleeved with mutually meshing transmission gears.

[0016] A method for laying and positioning a large-radius elbow for laying a PVC pipe is carried out using the above-mentioned device, and comprises the following steps:

[0017] S1. Use the clamping assembly on the straight pipe support seat to clamp the straight pipe section of the PVC pipe, and use the straight pipe positioning bracket and the straight pipe locking assembly to further fix the straight pipe section;

[0018] S2, fixing and connecting the bent pipe bracket to the straight pipe support seat and the straight pipe positioning bracket;

[0019] S3, start the bending positioning assembly to make the rubber rod gradually bend the PVC pipe, and use the pointer and angle plate to monitor the bending angle in real time;

[0020] S4, the bidirectional screw and the movable plate drive the arc clamp to clamp the bend of the PVC pipe to further control the bending accuracy;

[0021] S5. According to the infrared calibration result, adjust the position and angle of the PVC pipe and calibrate the laying position and direction of the PVC pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, the device is equipped with a pointer and an angle dial, which can monitor the bending angle in real time to ensure that the position and angle of the elbow meet the preset requirements. The straight pipe support seat and the bent pipe bracket are aligned with the infrared transmitter and the receiver, so that the device can calibrate the laying position and direction of the PVC pipe, thereby improving the laying accuracy.

[0024] 2. In the present invention, the clamping assembly achieves a firm clamping of the straight pipe section of the PVC pipe by pushing the cylinder and the arc-shaped abutment plate, ensuring that it will not loosen or move during the laying process. At the same time, the movement of the straight pipe is restricted by the straight pipe wrapping disc, wear-resistant card ball, fixed block and limit spring, thereby further enhancing the stability of the straight pipe section.

[0025] 3. In the present invention, the bending and positioning assembly realizes the gradual bending of the PVC pipe through the cooperation of the DC motor, the drive shaft, the rotating rod and the limit slider, thereby improving the forming quality of the elbow. The various components cooperate closely and can adapt to the laying requirements of PVC pipes of different specifications and curvatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a side view of the outward-expanding rotating bracket in the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the clamping assembly in the present invention;

[0030] Figure 4 It is a structural schematic diagram of the straight tube locking assembly in the present invention;

[0031] Figure 5 This is a rotation effect diagram of the bending and positioning assembly in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the detection part in the present invention;

[0033] Figure 7 It is a structural schematic diagram of the bending pipe limiting part in the present invention;

[0034] Figure 8 For the present invention Figure 5 Enlarged view of point A in the middle.

[0035] In the figure:

[0036] 1. Straight pipe support seat; 2. Straight pipe positioning bracket; 3. Bend pipe bracket; 4. Outward expansion rotating bracket;

[0037] 5. Clamping assembly; 51. Fixed boss; 52. Pushing cylinder; 53. Arc-shaped abutment plate; 54. Vertical axis;

[0038] 6. Straight tube locking assembly; 61. Straight tube wrapping disc; 62. Wear-resistant card ball; 63. Fixed block; 64. Limit spring;

[0039] 7. Bending positioning assembly; 71. DC motor; 72. Driving shaft; 73. Rotating rod; 74. Limiting slider; 75. Rubber stop rod;

[0040] 76, detection unit; 761, pointer; 762, angle plate;

[0041] 77, bending pipe limiting part; 771, hollow bracket; 772, stepping motor; 773, bidirectional screw; 774, movable plate; 775, arc clamping plate;

[0042] 8. Infrared transmitter; 9. Infrared receiver; 10. Transmission gear; 11. Hydraulic cylinder. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] like Figure 1-8 A large-arc elbow positioning device for laying PVC pipes is shown: it includes a straight pipe support seat 1, a straight pipe positioning bracket 2, a bent pipe bracket 3, an outward-expanding rotating bracket 4, a clamping assembly 5, a straight pipe locking assembly 6 and a bending positioning assembly 7, the clamping assembly 5 is installed on the top of the straight pipe support seat 1, the two sides of the straight pipe positioning bracket 2 are respectively fixedly connected to the surfaces of the straight pipe support seat 1 and the bent pipe bracket 3, the outward-expanding rotating bracket 4 is rotatably connected to the top of the bent pipe bracket 3, the straight pipe locking assembly 6 is threadedly connected to the top of the straight pipe positioning bracket 2, and the bending positioning assembly 7 is installed on the top of the bent pipe bracket 3;

[0045] The straight pipe support seat 1 is used to support the clamping assembly 5, the clamping assembly 5 is used to clamp the straight pipe section of the PVC pipe, the straight pipe positioning bracket 2 is used to support the straight pipe locking assembly 6, the straight pipe locking assembly 6 is used to clamp the straight pipe section and keep the laying stable, the bent pipe bracket 3 is used to align the straight pipe locking assembly 6, the outward expansion rotating bracket 4 is used to support the bending positioning assembly 7, the bending positioning assembly 7 is used to bend the PVC pipe while monitoring the bending angle in real time.

[0046] The straight pipe support seat 1 serves as the base of the entire device, firmly supporting the clamping assembly 5 above. The straight pipe positioning bracket 2 connects the straight pipe support seat 1 and the bent pipe bracket 3 to provide support for the straight pipe locking assembly 6. The bent pipe bracket 3 is aligned with the straight pipe locking assembly 6 and serves as the installation basis for the bending positioning assembly 7. The outward-expanding rotating bracket 4 is rotatably connected to the top of the bent pipe bracket 3, supporting the bending positioning assembly 7 and realizing the rotation function. The clamping assembly 5 is used to clamp the straight pipe section of the PVC pipe. The straight pipe locking assembly 6 further fixes the straight pipe section to ensure smooth laying, and the bending positioning assembly 7 is used to bend the PVC pipe and monitor the bending angle in real time. The infrared transmitter 8 and the infrared receiver 9 are used to calibrate the laying position and direction of the PVC pipe. The transmission gear 10 connects the drive shaft 72 and the rotating rod 73 to achieve synchronous rotation.

[0047] The clamping assembly 5 includes a fixed boss 51, a pushing cylinder 52, an arc-shaped abutment plate 53 and a vertical shaft 54. The fixed boss 51 is fixedly connected to the top of the straight tube support seat 1, the pushing cylinder 52 is installed in the middle of the top end of the fixed boss 51, the middle of the protruding end of the arc-shaped abutment plate 53 is fixedly connected to the output end of the pushing cylinder 52, and the vertical shaft 54 ​​passes through both sides of the arc-shaped abutment plate 53 and is fixedly connected to the surface of the fixed boss 51 and the straight tube support seat 1.

[0048] The straight tube locking assembly 6 includes a straight tube wrapping disc 61, a wear-resistant locking ball 62, a fixed block 63 and a limit spring 64. The straight tube wrapping disc 61 is threadedly connected to the top of the straight tube positioning bracket 2, the wear-resistant locking ball 62 is movably connected to the inside of the straight tube wrapping disc 61, the outer side of the fixed block 63 is fixedly connected to the surface of the wear-resistant locking ball 62, and the two sides of the limit spring 64 are respectively fixedly connected to the surfaces of the straight tube wrapping disc 61 and the fixed block 63.

[0049] The bending positioning assembly 7 includes a DC motor 71, a drive shaft 72, a rotating rod 73, a limit slider 74, a rubber abutment rod 75, a detection part 76 and a bend limit part 77. The DC motor 71 is installed on the outside of the bend bracket 3, the drive shaft 72 is fixedly connected to the outside of the output end of the DC motor 71, the rotating rod 73 is fixedly connected to the middle part of the outward-expanding rotating bracket 4, the limit slider 74 is slidably connected to one side of the outward-expanding rotating bracket 4, the rubber abutment rod 75 is fixedly connected to the outside of the limit slider 74, the detection part 76 is installed on one side of the rotating rod 73, and the bend limit part 77 is fixedly connected to one side of the outward-expanding rotating bracket 4.

[0050] The bend limiting portion 77 includes a hollow bracket 771, a stepper motor 772, a bidirectional screw 773, a movable plate 774 and an arc-shaped clamping plate 775. The hollow bracket 771 is fixedly connected to the outside of the outward-expanding rotating bracket 4, the stepper motor 772 is installed on both sides of the hollow bracket 771, the bidirectional screw 773 is fixedly connected to the outside of the output end of the stepper motor 772, the movable plate 774 is threadedly sleeved on the outside of the bidirectional screw 773, and the arc-shaped clamping plate 775 is fixedly connected to the middle part of the movable plate 774 and clamped with the surface of the bend of the PVC pipe.

[0051] The detection part 76 includes a pointer 761 and an angle plate 762 . The pointer 761 is welded to a side of the rotating rod 73 away from the outwardly expanding rotating bracket 4 , and the angle plate 762 is fixedly connected to the outer side of the elbow bracket 3 .

[0052] An infrared transmitter 8 and an infrared receiver 9 of matching models are also provided on one side of the straight tube support seat 1 and the bent tube support 3 .

[0053] One end of the driving shaft 72 and the rotating rod 73 is also sleeved with a transmission gear 10 that meshes with each other.

[0054] A method for positioning a large-radius elbow for laying a PVC pipe is also proposed, which is carried out using the above-mentioned device and includes the following steps:

[0055] S1. Use the clamping assembly 5 on the straight pipe support seat 1 to clamp the straight pipe section of the PVC pipe, and use the straight pipe positioning bracket and the straight pipe locking assembly 6 to further fix the straight pipe section;

[0056] S2, fixedly connecting the bent pipe bracket 3 to the straight pipe support seat 1 and the straight pipe positioning bracket 2;

[0057] S3, start the bending positioning assembly 7 to make the rubber rod 75 gradually bend the PVC pipe, and use the pointer 761 and the angle plate 762 to monitor the bending angle in real time;

[0058] S4, the bidirectional screw 773 and the movable plate 774 drive the arc clamping plate 775 to clamp the bend of the PVC pipe to further control the bending accuracy;

[0059] S5. According to the infrared calibration results, adjust the position and angle of the PVC pipe and calibrate the laying position and direction of the PVC pipe

[0060] Working principle: Place the straight section of the PVC pipe on the straight pipe support seat 1, and drive the arc-shaped abutment plate 53 to initially clamp it through the push cylinder 52 of the clamping assembly 5, rotate the straight pipe wrapping disc 61 of the straight pipe locking assembly 6, so that the wear-resistant card ball 62 is close to the surface of the PVC pipe, and the limit spring 64 provides appropriate clamping force. Align the bending pipe bracket 3 with the straight pipe positioning bracket 2 and fix them, and adjust the outward expansion rotating bracket 4 to the appropriate position. Start the DC motor 71, and drive the rotating rod 73 to rotate through the drive shaft 72 and the transmission gear 10. At the same time, the hydraulic cylinder 11 drives the limit slider 74 and the rubber abutment 75 to slide along the outward expansion rotating bracket 4 to gradually bend the PVC pipe; at the same time, the pointer 761 of the detection part 76 rotates with the rotating rod 73, and indicates the current bending angle on the angle disk 762. When the preset bending angle is reached, the stepper motor 772 of the bend limiter 77 is started, and the stepper motor 772 drives the bidirectional screw 773 to rotate, driving the movable plate 774 and the arc clamping plate 775 to move to the bend of the PVC pipe and clamp it. The position and angle of the PVC pipe are calibrated by the infrared transmitter 8 and the infrared receiver 9, and the position and angle of the PVC pipe are adjusted according to the calibration results to ensure that they are consistent with the overall laying plan. After the calibration is completed, the PVC pipe is fixed at the predetermined position to complete the laying of the large arc elbow.

[0061] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-radius elbow positioning device for PVC pipe laying, characterized in that: It comprises a straight tube support seat (1), a straight tube positioning bracket (2), a bent tube bracket (3), an outward-expanding rotating bracket (4), a clamping assembly (5), a straight tube locking assembly (6) and a bending positioning assembly (7), wherein the clamping assembly (5) is mounted on the top of the straight tube support seat (1), the two sides of the straight tube positioning bracket (2) are respectively fixedly connected to the surfaces of the straight tube support seat (1) and the bent tube bracket (3), the outward-expanding rotating bracket (4) is rotatably connected to the top of the bent tube bracket (3), the straight tube locking assembly (6) is threadedly connected to the top of the straight tube positioning bracket (2), and the bending positioning assembly (7) is mounted on the top of the bent tube bracket (3); The straight pipe support seat (1) is used to support the clamping assembly (5), and the clamping assembly (5) is used to clamp the straight pipe section of the PVC pipe. The straight pipe positioning bracket (2) is used to support the straight pipe locking assembly (6), and the straight pipe locking assembly (6) is used to clamp the straight pipe section and maintain stable laying. The bent pipe bracket (3) is used to align the straight pipe locking assembly (6). The outward-expanding rotating bracket (4) is used to support the bending positioning assembly (7), and the bending positioning assembly (7) is used to monitor the bending angle in real time while bending the PVC pipe.

2. The large-radius elbow positioning device for PVC pipe laying according to claim 1 is characterized in that: The clamping assembly (5) comprises a fixed boss (51), a pushing cylinder (52), an arc-shaped abutment plate (53) and a vertical shaft (54); the fixed boss (51) is fixedly connected to the top of the straight tube support seat (1); the pushing cylinder (52) is installed in the middle of the top end of the fixed boss (51); the middle of the protruding end of the arc-shaped abutment plate (53) is fixedly connected to the output end of the pushing cylinder (52); the vertical shaft (54) passes through both sides of the arc-shaped abutment plate (53) and is fixedly connected to the surface of the fixed boss (51) and the straight tube support seat (1).

3. The large-radius elbow positioning device for PVC pipe laying according to claim 1 is characterized in that: The straight tube locking assembly (6) comprises a straight tube wrapping disc (61), a wear-resistant retaining ball (62), a fixing block (63) and a limiting spring (64); the straight tube wrapping disc (61) is threadedly connected to the top of the straight tube positioning bracket (2); the wear-resistant retaining ball (62) is movably connected to the inside of the straight tube wrapping disc (61); the outer side of the fixing block (63) is fixedly connected to the surface of the wear-resistant retaining ball (62); and the two sides of the limiting spring (64) are respectively fixedly connected to the surfaces of the straight tube wrapping disc (61) and the fixing block (63).

4. The large-radius elbow positioning device for PVC pipe laying according to claim 1 is characterized in that: The bending positioning assembly (7) comprises a DC motor (71), a drive shaft (72), a rotating rod (73), a limiting slider (74), a rubber abutment rod (75), a detection portion (76) and a bending tube limiting portion (77); the DC motor (71) is mounted on the outside of the bending tube bracket (3); the drive shaft (72) is fixedly connected to the outside of the output end of the DC motor (71); the rotating rod (73) is fixedly connected to the middle of the outward-expanding rotating bracket (4); the limiting slider (74) is slidably connected to one side of the outward-expanding rotating bracket (4); the rubber abutment rod (75) is fixedly connected to the outside of the limiting slider (74); the detection portion (76) is mounted on one side of the rotating rod (73); and the bending tube limiting portion (77) is fixedly connected to one side of the outward-expanding rotating bracket (4).

5. The large-radius elbow positioning device for PVC pipe laying according to claim 4 is characterized in that: The pipe bending limiter (77) comprises a hollow bracket (771), a stepper motor (772), a bidirectional screw (773), a movable plate (774) and an arc-shaped clamping plate (775); the hollow bracket (771) is fixedly connected to the outside of the outwardly expanding rotating bracket (4); the stepper motor (772) is installed on both sides of the hollow bracket (771); the bidirectional screw (773) is fixedly connected to the outside of the output end of the stepper motor (772); the movable plate (774) is threadedly sleeved on the outside of the bidirectional screw (773); and the arc-shaped clamping plate (775) is fixedly connected to the middle of the movable plate (774) and clamped with the surface of the pipe bending portion of the PVC pipe.

6. The large-radius elbow positioning device for PVC pipe laying according to claim 4, characterized in that: The detection part (76) comprises a pointer (761) and an angle plate (762); the pointer (761) is welded to a side of the rotating rod (73) away from the outwardly expanding rotating bracket (4); and the angle plate (762) is fixedly connected to the outside of the curved pipe bracket (3).

7. The large-radius elbow positioning device for PVC pipe laying according to claim 1, characterized in that: An infrared transmitter (8) and an infrared receiver (9) of matching models are also provided on one side of the straight tube support seat (1) and the curved tube support (3).

8. The large-radius elbow positioning device for PVC pipe laying according to claim 4, characterized in that: One end of the driving shaft (72) and the rotating rod (73) is also sleeved with a mutually meshing transmission gear (10).

9. The method for laying and positioning large-radius elbows for laying PVC pipes according to claim 1, characterized in that: The method is carried out using a device as described in any one of claims 1 to 8, comprising the following steps: S1. Use the clamping assembly (5) on the straight pipe support seat (1) to clamp the straight pipe section of the PVC pipe, and use the straight pipe positioning bracket and the straight pipe locking assembly (6) to further fix the straight pipe section; S2, fixedly connecting the bent pipe bracket (3) to the straight pipe support seat (1) and the straight pipe positioning bracket (2); S3, starting the bending positioning assembly (7) to allow the rubber support rod (75) to gradually bend the PVC pipe, while using the pointer (761) and the angle plate (762) to monitor the bending angle in real time; S4, the bidirectional screw (773) and the movable plate (774) drive the arc clamping plate (775) to clamp the bend of the PVC pipe to further control the bending accuracy; S5. According to the infrared calibration result, adjust the position and angle of the PVC pipe and calibrate the laying position and direction of the PVC pipe.

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