Bend positioning detection device
By designing a bend positioning and detection device, which uses positioning grooves and clamping bolts to fix both ends of the bend and positioning pins to locate the middle hole, the problem of high efficiency and low cost in bend detection is solved, and the rapid and accurate judgment of bend detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN Y&J IND CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-12
AI Technical Summary
Existing technologies make it difficult to achieve efficient and low-cost positioning and inspection in pipe bending, especially for the bending structures of diesel engine intake and exhaust pipes. Conventional measuring tools cannot be used for inspection, and coordinate measuring machines are inefficient and costly.
A bend positioning and detection device was designed, including a base, a positioning seat and a pressure plate. The two ends of the bend are fixed by positioning grooves and clamping bolts, and the middle hole is located by positioning pin. The distance between the end faces and the center height of the bend are detected by feeler gauge and depth gauge.
It achieves efficient and low-cost positioning and inspection of bent pipes. The structure is simple and reliable, easy to assemble, and can quickly determine whether the distance between the end faces and the center height of the bent pipe are qualified by using conventional inspection tools, thereby improving inspection efficiency and saving costs.
Smart Images
Figure CN224353756U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pipe bend positioning and detection device, belonging to the field of pipeline measurement technology. Background Technology
[0002] The bent pipe product involved in this utility model is mainly used for intake and exhaust pipes in diesel engines. These diesel engines are primarily used in the oil and gas extraction industry to drive compressors and generators. The bent pipe consists of a first straight pipe section, an intermediate transition section, and a second straight pipe section connected in sequence. The intermediate transition section has a central hole in the bent pipe. Due to assembly space and position limitations, after processing, it is necessary to ensure that the distance from the central hole of the bent pipe to the end faces of both ends meets the design requirements, and that the center heights of the two ends of the bent pipe are consistent. Due to the structural limitations of the bent pipe, it cannot be directly inspected using conventional measuring tools; a coordinate measuring machine (CMM) is required. However, due to resource and cost limitations of CMMs, CMM inspection is inefficient and costly, therefore unsuitable for the inspection of large batches of parts. Utility Model Content
[0003] The present invention aims to provide a simple and accurate pipe bending positioning and detection device to improve the detection efficiency of the above-mentioned pipe bending products and save detection costs.
[0004] The technical solution adopted by this utility model to solve its technical problem is: a bent pipe positioning and detection device, including a base, a first positioning seat, a first pressure plate, a second positioning seat, a second pressure plate, and a third positioning seat. The first positioning seat, the second positioning seat, and the third positioning seat are all fixedly disposed on the upper surface of the base. The third positioning seat is located in the interval area between the first positioning seat and the second positioning seat. The first positioning seat is provided with a bent pipe first end positioning groove with an upward opening. The bent pipe first end positioning groove includes at least a first arc surface located at its bottom. The second positioning seat is provided with a bent pipe second end positioning groove with an upward opening. The bent pipe second end positioning groove includes at least a second arc surface located at its bottom. The axis of the first arc surface and the axis of the second arc surface are parallel to each other and located on the same horizontal plane; the first pressure plate passes through... The first clamping bolt is connected to the upper end face of the positioning groove at the first end of the bend. The first pressure plate is used to clamp and fix the first end of the bend. The second pressure plate is connected to the upper end face of the positioning groove at the second end of the bend through the second clamping bolt. The second pressure plate is used to clamp and fix the second end of the bend. A positioning plate is fixedly installed on the top of the third positioning seat. A positioning pin with a vertical axis is connected to the positioning plate. The lower end of the positioning pin is used to position and connect the middle hole of the bend. A first measuring end face is provided at the end of the positioning groove at the first end of the bend away from the second positioning seat along its axial direction. The first measuring end face is a vertical plane perpendicular to the axis of the first arc surface. A second measuring end face is provided at the end of the positioning groove at the second end of the bend away from the first positioning seat along its axial direction. The second measuring end face is a vertical plane perpendicular to the axis of the second arc surface.
[0005] A further preferred embodiment is that a closed end plate is provided at the end of the positioning groove at the first end of the bend that is away from the second positioning seat along its axial direction, and the inner surface of the closed end plate is the first measuring end face; the two ends of the positioning groove at the second end of the bend are through groove structures along its axial direction, and the outer end face of the second positioning seat is the second measuring end face.
[0006] A further preferred embodiment is that the first arc surface is a semi-circular groove; the second arc surface is a semi-circular groove.
[0007] A further preferred embodiment is that the first pressure plate includes a first pressing part and a first horizontal plate connected to both sides of the first pressing part. The lower surface of the first pressing part is a V-shaped groove structure, an isosceles trapezoidal groove structure, or an arc-shaped groove structure. The first horizontal plate is connected to the upper end face of the positioning groove at the first end of the bend pipe by first pressing bolts.
[0008] A further preferred embodiment is that the second pressure plate includes a second pressing part and a second horizontal plate connected to both sides of the second pressing part. The lower surface of the second pressing part is a V-shaped groove structure, an isosceles trapezoidal groove structure, or an arc-shaped groove structure. The second horizontal plate is connected to the upper end face of the positioning groove at the second end of the bend pipe by a second pressing bolt.
[0009] A further preferred embodiment is that the first positioning seat and the base are slidably connected by a first sliding groove and a first protrusion, the length direction of the first sliding groove being consistent with the axial direction of the first arc surface. The base is provided with a plurality of first bolt connection A holes spaced apart along the length direction of the first sliding groove, and the first positioning seat is provided with a first bolt connection B hole. The first positioning seat and the base are connected and fixed by the cooperation of the first fixing bolt, the first bolt connection A hole and the first bolt connection B hole. The second positioning seat and the base are slidably connected by a second sliding groove and a second protrusion, the length direction of the second sliding groove being consistent with the axial direction of the second arc surface. The base is provided with a plurality of second bolt connection A holes spaced apart along the length direction of the second sliding groove, and the second positioning seat is provided with a second bolt connection B hole. The second positioning seat and the base are connected and fixed by the cooperation of the second fixing bolt, the second bolt connection A hole and the second bolt connection B hole.
[0010] A further preferred embodiment is that the first positioning seat includes a first base plate, a first vertical plate, and a first top plate. The lower end of the first vertical plate is vertically connected to the middle of the first base plate, and the upper end of the first vertical plate is vertically connected to the middle of the first top plate. The first base plate is connected and fixed to the base on both sides of the first vertical plate by first fixing bolts.
[0011] A further preferred embodiment is that the second positioning seat includes a second base plate, a second vertical plate, and a second top plate. The lower end of the second vertical plate is vertically connected to the middle of the second base plate, and the upper end of the second vertical plate is vertically connected to the middle of the second top plate. The second base plate is connected and fixed to the base on both sides of the second vertical plate by second fixing bolts.
[0012] A further preferred embodiment is that the third positioning seat includes a third base plate and a third vertical plate. The lower end of the third vertical plate is vertically connected to the middle of the third base plate, and the positioning plate is vertically connected to the upper side of the third vertical plate. The third base plate is connected and fixed to the base on both sides of the third vertical plate by third fixing bolts.
[0013] A further preferred embodiment is that the positioning pin is a stepped pin with an upper diameter larger than the lower diameter, and the positioning plate is provided with a stepped hole that matches the positioning pin.
[0014] The beneficial effects of this utility model are as follows: In specific implementation, the first straight pipe section of the bend is placed in the positioning groove at the first end of the bend, and the second straight pipe section of the bend is placed in the positioning groove at the second end of the bend. Then, the positioning pin is matched and connected with the middle hole of the bend. Finally, the two ends of the bend are pressed and fixed by the first pressure plate and the second pressure plate respectively, and then the inspection can be carried out. During the inspection, a feeler gauge can be used to check the gap between the two ends of the bend and the bottom of the first arc surface and the second arc surface to determine whether the center height of the pipe openings on both sides of the bend is qualified; the distance between the end face of the first straight pipe section of the bend and the first measuring end face can be checked by a feeler gauge or a depth gauge to determine whether the distance between the end face of the first straight pipe section of the bend and the middle hole of the bend is qualified; the distance between the end face of the second straight pipe section of the bend and the second measuring end face can be checked by a feeler gauge or a depth gauge to determine whether the distance between the end face of the second straight pipe section of the bend and the middle hole of the bend is qualified. This utility model has a simple and reliable structure, precise positioning, and is easy to assemble. It can quickly detect the distance between the ends of the bent pipe and the center height using conventional inspection tools such as feeler gauges and depth gauges, thereby overcoming the drawbacks of coordinate measuring machine (CMM) inspection, improving inspection efficiency, and saving inspection costs. Attached Figure Description
[0015] Figure 1 This is a top view of the bent pipe that needs to be inspected according to this utility model;
[0016] Figure 2 This is an isometric drawing of the overall structure of the pipe bending positioning and detection device involved in this utility model;
[0017] Figure 3 yes Figure 2 The illustrated embodiment is an isometric view of the overall structure after the bent pipe to be inspected has been fixed.
[0018] Figure 4 yes Figure 2 Top view of the base in the illustrated embodiment.
[0019] The components in the diagram are labeled as follows: base 1, first positioning seat 2, first pressure plate 3, second positioning seat 4, second pressure plate 5, third positioning seat 6, first clamping bolt 7, second clamping bolt 8, positioning plate 9, positioning pin 10, first sliding groove 11, first bolt connection A hole 12, first fixing bolt 13, second sliding groove 14, second bolt connection A hole 15, second fixing bolt 16, third fixing bolt 17, third bolt connection A hole 18, bend 20, first straight pipe section 21, second straight pipe section 22, and bend middle hole 23. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0021] See Figure 1 The bend 20 to be tested in this utility model consists of a first straight pipe section 21, an intermediate transition section, and a second straight pipe section 22 connected in sequence. The axis of the first straight pipe section 21 and the axis of the second straight pipe section 22 are required to be parallel to each other and located in the same horizontal plane. The intermediate transition section is provided with a bend middle hole 23. The axis of the bend middle hole 23 is vertically arranged along the radial direction of the bend 20. The distance between the axis of the bend middle hole 23 and the outer end face of the first straight pipe section 21 in the axial direction of the first straight pipe section 21 is set as L1. The distance between the axis of the bend middle hole 23 and the outer end face of the second straight pipe section 22 in the axial direction of the second straight pipe section 22 is set as L2. Both L1 and L2 need to meet the design requirements.
[0022] Further reading Figures 2 to 4The pipe bending positioning and detection device of this utility model includes a base 1, a first positioning seat 2, a first pressure plate 3, a second positioning seat 4, a second pressure plate 5, and a third positioning seat 6. The first positioning seat 2, the second positioning seat 4, and the third positioning seat 6 are all fixedly disposed on the upper surface of the base 1. The third positioning seat 6 is located in the interval area between the first positioning seat 2 and the second positioning seat 4. The first positioning seat 2 is provided with an upward-opening pipe bending first end positioning groove, which includes at least a first arc surface at its bottom. The second positioning seat 4 is provided with an upward-opening pipe bending second end positioning groove, which includes at least a second arc surface at its bottom. The axis of the first arc surface and the axis of the second arc surface are parallel to each other and located on the same horizontal plane. The first pressure plate 3 is secured by a first clamping bolt 7. A first pressure plate 3 is connected to the upper end face of the positioning groove at the first end of the bend and is used to press and fix the first end of the bend. A second pressure plate 5 is connected to the upper end face of the positioning groove at the second end of the bend through a second clamping bolt 8 and is used to press and fix the second end of the bend. A positioning plate 9 is fixedly installed on the top of the third positioning seat 6. A positioning pin 10 with its axis set vertically is connected to the positioning plate 9. The lower end of the positioning pin 10 is used to position and connect to the middle hole 23 of the bend. A first measuring end face is provided at the end of the positioning groove at the first end of the bend away from the second positioning seat 4 along its axial direction. The first measuring end face is a vertical plane perpendicular to the axis of the first arc surface. A second measuring end face is provided at the end of the positioning groove at the second end of the bend away from the first positioning seat 2 along its axial direction. The second measuring end face is a vertical plane perpendicular to the axis of the second arc surface.
[0023] It is understandable that the positioning groove at the first end of the bend is used for positioning and detecting the first end of the bend, and the positioning groove at the second end of the bend is used for positioning and detecting the second end of the bend. Figure 1 In the illustrated embodiment, the first end of the bend corresponds to the first straight pipe segment 21, and the second end of the bend corresponds to the second straight pipe segment 22. The diameter of the first arc surface should be designed to match the outer diameter of the first straight pipe segment 21, and the diameter of the second arc surface should be designed to match the outer diameter of the second straight pipe segment 22. The lower end diameter of the locating pin 10 is designed to match the inner diameter of the hole 23 in the middle of the bend.
[0024] In practice, the first straight pipe section 21 of the bend 20 is placed in the positioning groove at the first end of the bend, and the second straight pipe section 22 of the bend 20 is placed in the positioning groove at the second end of the bend. Then, the positioning pin 10 is matched and connected to the hole 23 in the middle of the bend. Finally, the first pressure plate 3 and the second pressure plate 5 are used to press and fix the two ends of the bend 20, respectively, for testing. During testing, a feeler gauge can be used to check the gap between the two ends of the bend 20 and the bottom of the first and second arc surfaces to determine whether the center height of the two ends of the bend 20 is qualified.
[0025] for Figure 1In the illustrated embodiment, the detection of dimensions L1 and L2 can be performed by selecting appropriate gauges according to the arrangement of the first and second measuring end faces. For example, to further facilitate assembly positioning, in a preferred embodiment of this utility model, a closed end plate is provided at the end of the first end positioning groove of the bent pipe away from the second positioning seat 4 along its axial direction, and the inner surface of the closed end plate is the first measuring end face; the two ends of the second end positioning groove of the bent pipe are through groove structures along its axial direction, and the outer end face of the second positioning seat 4 (i.e., the outer end face of the second end positioning groove of the bent pipe away from the first positioning seat 2 along its axial direction) is the second measuring end face. Correspondingly, during specific testing, the distance between the end face of the first straight pipe section 21 of the bend 20 and the first measuring end face can be measured using a feeler gauge to determine whether the distance (i.e., L1) between the end face of the first straight pipe section 21 of the bend 20 and the central hole 23 of the bend 20 is qualified; the distance between the end face of the second straight pipe section 22 of the bend 20 and the second measuring end face can be measured using a depth gauge to determine whether the distance (i.e., L2) between the end face of the second straight pipe section 22 of the bend 20 and the central hole 23 of the bend 20 is qualified. This utility model has a simple and reliable structure, accurate positioning, and is easy to assemble. It can quickly detect the distance between the end faces of the bend and the center height using conventional gauges such as feeler gauges and depth gauges, thereby overcoming the drawbacks of coordinate measuring machine (CMM) testing, improving testing efficiency, and saving testing costs. It is understood that in some alternative embodiments, if the axial ends of the positioning groove at the first end of the bend are through grooves, L1 can be measured using a depth gauge; if one axial end of the positioning groove at the second end of the bend is a closed structure, L2 can be measured using a feeler gauge.
[0026] To make the positioning structure more reliable, in some preferred embodiments, the first arc surface is a semi-circular groove, which can form a larger mating surface relative to the first straight pipe section 21 of the bend 20. Similarly, the second arc surface is preferably a semi-circular groove.
[0027] To make the fixing structure more reliable, in some preferred embodiments, the first pressure plate 3 includes a first pressing part and a first horizontal plate connected to both sides of the first pressing part. The lower surface of the first pressing part is a V-shaped groove structure, an isosceles trapezoidal groove structure, or an arc-shaped groove structure. The first horizontal plates are respectively connected to the upper end face of the positioning groove of the first end of the bend through the first pressing bolts 7. When the lower surface of the first pressing part is a V-shaped groove structure or an isosceles trapezoidal groove structure, two symmetrical line contact pressing and fixing structures can be formed, which can fully ensure the structural reliability of the first straight pipe section 21 of the bend 20 during fixed assembly. When the lower surface of the pressing part is an arc-shaped groove structure, a surface contact pressing and fixing structure can be formed, which can also fully ensure the structural reliability of the first straight pipe section 21 of the bend 20 during fixed assembly. Similarly, in some preferred embodiments, the second pressure plate 5 includes a second pressing part and a second horizontal plate connected to both sides of the second pressing part. The lower surface of the second pressing part is a V-groove structure, an isosceles trapezoidal groove structure, or an arc-shaped groove structure. The second horizontal plate is connected to the upper end face of the positioning groove at the second end of the bend pipe by the second pressing bolt 8. More specifically, the bolt holes on the first horizontal plate that mate with the first pressing bolt 7 can be through holes or through grooves (the embodiment shown in the figure uses a U-shaped through groove structure with an open side end). The bolt holes on the first positioning seat 2 that mate with the first pressing bolt 7 are threaded holes. The bolt holes on the second horizontal plate that mate with the second pressing bolt 8 can be through holes or through grooves (the embodiment shown in the figure uses a U-shaped through groove structure with an open side end). The bolt holes on the second positioning seat 4 that mate with the second pressing bolt 8 are threaded holes.
[0028] To improve the versatility of the pipe bending positioning detection device, in some preferred embodiments, the first positioning seat 2 and the base 1 are slidably connected by a first sliding groove 11 and a first protrusion. The length direction of the first sliding groove 11 is consistent with the axial direction of the first arc surface. The base 1 is provided with a plurality of first bolt connection A holes 12 spaced apart along the length direction of the first sliding groove 11, and the first positioning seat 2 is provided with a first bolt connection B hole. The first positioning seat 2 and the base 1 are connected and fixed by the cooperation of the first fixing bolt 13, the first bolt connection A hole 12 and the first bolt connection B hole. The second positioning seat 4 and the base 1 are slidably connected by a second sliding groove 14 and a second protrusion. The length direction of the second sliding groove 14 is consistent with the axial direction of the second arc surface. The base 1 is provided with a plurality of second bolt connection A holes 15 spaced apart along the length direction of the second sliding groove 14, and the second positioning seat 4 is provided with a second bolt connection B hole. The second positioning seat 4 and the base 1 are connected and fixed by the cooperation of the second fixing bolt 16, the second bolt connection A hole 15 and the second bolt connection B hole. When the length of the bend 20 to be inspected is different, the first fixing bolt 13 and the second fixing bolt 16 can be removed accordingly, allowing the positions of the first positioning seat 2 and the second positioning seat 4 to be slidably adjusted. After the first positioning seat 2 and the second positioning seat 4 are adjusted to the set positions, the first fixing bolt 13 and the second fixing bolt 16 can be reconnected and fixed. In the embodiment shown in the attached figure, the first sliding groove 11 and the second sliding groove 14 are both provided on the upper surface of the base 1. In some alternative embodiments, the first sliding groove 11 and the first protrusion can be interchanged. In other alternative embodiments, the second sliding groove 14 and the second protrusion can also be interchanged. To facilitate the connection and fixing of the bolts, the first bolt connection B hole and the second bolt connection B hole can usually be set as through holes, and the first bolt connection A hole 12 and the second bolt connection A hole 15 can be designed as threaded holes.
[0029] To ensure a simple, reliable structure that is easy to manufacture and assemble, in some preferred embodiments, the first positioning seat 2 includes a first base plate, a first vertical plate, and a first top plate. The lower end of the first vertical plate is vertically connected to the middle of the first base plate, and the upper end of the first vertical plate is vertically connected to the middle of the first top plate. The first base plate is connected and fixed to the base 1 on both sides of the first vertical plate by first fixing bolts 13. In the preferred embodiments described above, the first sliding groove 11 is typically preferably located in the lower region of the first vertical plate, and the first fixing bolts 13 are located on both sides of the first sliding groove 11.
[0030] To ensure a simple, reliable structure that is easy to manufacture and assemble, in some preferred embodiments, the second positioning seat 4 includes a second base plate, a second vertical plate, and a second top plate. The lower end of the second vertical plate is vertically connected to the middle of the second base plate, and the upper end of the second vertical plate is vertically connected to the middle of the second top plate. The second base plate is connected and fixed to the base 1 on both sides of the second vertical plate by second fixing bolts 16. In the preferred embodiments described above, the second slide groove 14 is typically preferably located in the lower region of the second vertical plate, and the second fixing bolts 16 are located on both sides of the second slide groove 14.
[0031] To ensure a simple, reliable structure that is easy to manufacture and assemble, in some preferred embodiments, the third positioning base 6 includes a third base plate and a third vertical plate. The lower end of the third vertical plate is vertically connected to the middle of the third base plate, and the positioning plate 9 is vertically connected to the upper side of the third vertical plate. The third base plate is connected and fixed to the base 1 on both sides of the third vertical plate by third fixing bolts 17. Correspondingly, the base 1 is provided with a third bolt connection A hole 18 that matches the third fixing bolt 17, and the third base plate is provided with a third bolt connection B hole that matches the third fixing bolt 17. To facilitate the connection and fixing of the third fixing bolt 17, the third bolt connection B hole can usually be designed as a through hole structure, and the third bolt connection A hole 18 can be designed as a threaded hole structure.
[0032] To ensure a simple, reliable, and easy-to-assemble structure, in some preferred embodiments, the positioning pin 10 is a stepped pin with an upper diameter larger than its lower diameter, and the positioning plate 9 is provided with a stepped hole that matches the positioning pin 10. With this design, the positioning pin 10 can be reliably connected to the positioning plate 9 even when not connected to the bend 20.
Claims
1. A pipe bend positioning and detection device, characterized in that, The system includes a base (1), a first positioning seat (2), a first pressure plate (3), a second positioning seat (4), a second pressure plate (5), and a third positioning seat (6). The first positioning seat (2), the second positioning seat (4), and the third positioning seat (6) are all fixedly mounted on the upper surface of the base (1). The third positioning seat (6) is located in the gap area between the first positioning seat (2) and the second positioning seat (4). The first positioning seat (2) is provided with an upward-opening positioning groove for the first end of the bent pipe. The first end positioning groove for the bent pipe includes at least a first arc surface located at its bottom. The second positioning seat (4) is provided with an upward-opening positioning groove for the second end of the bent pipe. The second end positioning groove for the bent pipe includes at least a second arc surface located at its bottom. The axis of the first arc surface and the axis of the second arc surface are parallel to each other and located on the same horizontal plane. The first pressure plate (3) is connected to the bent pipe by a first clamping bolt (7). The upper end face of the positioning groove at the first end of the pipe is provided with a first pressure plate (3) for pressing and fixing the first end of the bend pipe, and a second pressure plate (5) is connected to the upper end face of the positioning groove at the second end of the bend pipe by a second clamping bolt (8). The second pressure plate (5) is used to press and fix the second end of the bend pipe. A positioning plate (9) is fixedly provided on the top of the third positioning seat (6). A positioning pin (10) with the axis set vertically is connected on the positioning plate (9). The lower end of the positioning pin (10) is used to position and connect the middle hole (23) of the bend pipe. A first measuring end face is provided at the end of the positioning groove at the first end of the bend pipe away from the second positioning seat (4) along its axial direction. The first measuring end face is a vertical plane perpendicular to the axis of the first arc surface. A second measuring end face is provided at the end of the positioning groove at the second end of the bend pipe away from the first positioning seat (2) along its axial direction. The second measuring end face is a vertical plane perpendicular to the axis of the second arc surface.
2. The pipe bending positioning and detection device as described in claim 1, characterized in that: The first end of the bend is provided with a closed end plate at the end of its axial direction away from the second positioning seat (4), and the inner surface of the closed end plate is the first measuring end face; the two ends of the second end of the bend are through groove structures, and the outer end face of the second positioning seat (4) is the second measuring end face.
3. The pipe bending positioning and detection device as described in claim 1, characterized in that: The first arc surface is a semi-circular groove; the second arc surface is a semi-circular groove.
4. The pipe bending positioning and detection device as described in claim 1, characterized in that: The first pressure plate (3) includes a first pressing part and a first horizontal plate connected to both sides of the first pressing part. The lower surface of the first pressing part is a V-shaped groove structure, an isosceles trapezoidal groove structure, or an arc groove structure. The first horizontal plate is connected to the upper end face of the positioning groove of the first end of the bend pipe by the first pressing bolt (7).
5. The pipe bending positioning and detection device as described in claim 1, characterized in that: The second pressure plate (5) includes a second pressing part and a second horizontal plate connected to both sides of the second pressing part. The lower surface of the second pressing part is a V-shaped groove structure, an isosceles trapezoidal groove structure, or an arc-shaped groove structure. The second horizontal plate is connected to the upper end face of the positioning groove of the second end of the bend pipe by the second pressing bolt (8).
6. The pipe bending positioning and detection device as described in claim 1, characterized in that: The first positioning seat (2) and the base (1) are slidably connected by the first sliding groove (11) and the first protrusion. The length direction of the first sliding groove (11) is consistent with the axial direction of the first arc surface. The base (1) is provided with a plurality of first bolt connection A holes (12) spaced apart along the length direction of the first sliding groove (11). The first positioning seat (2) is provided with a first bolt connection B hole. The first positioning seat (2) and the base (1) are connected and fixed by the cooperation of the first fixing bolt (13), the first bolt connection A hole (12) and the first bolt connection B hole. The second positioning seat (4) and the base (1) are connected by a second slide groove (14) and a second protrusion. The length direction of the second slide groove (14) is consistent with the axial direction of the second arc surface. The base (1) is provided with a plurality of second bolt connection A holes (15) spaced apart along the length direction of the second slide groove (14). The second positioning seat (4) is provided with a second bolt connection B hole. The second positioning seat (4) and the base (1) are connected and fixed by the cooperation of the second fixing bolt (16), the second bolt connection A hole (15) and the second bolt connection B hole.
7. The pipe bending positioning and detection device as described in claim 1, characterized in that: The first positioning seat (2) includes a first base plate, a first vertical plate and a first top plate. The lower end of the first vertical plate is vertically connected to the middle of the first base plate, and the upper end of the first vertical plate is vertically connected to the middle of the first top plate. The first base plate is connected and fixed to the base (1) on both sides of the first vertical plate by the first fixing bolts (13).
8. The pipe bending positioning and detection device as described in claim 1, characterized in that: The second positioning seat (4) includes a second base plate, a second vertical plate and a second top plate. The lower end of the second vertical plate is vertically connected to the middle of the second base plate, and the upper end of the second vertical plate is vertically connected to the middle of the second top plate. The second base plate is connected and fixed to the base (1) on both sides of the second vertical plate by the second fixing bolts (16).
9. The pipe bending positioning and detection device as described in claim 1, characterized in that: The third positioning seat (6) includes a third base plate and a third vertical plate. The lower end of the third vertical plate is vertically connected to the middle of the third base plate. The positioning plate (9) is vertically connected to the upper side of the third vertical plate. The third base plate is connected and fixed to the base (1) on both sides of the third vertical plate by the third fixing bolt (17).
10. The pipe bending positioning and detection device according to any one of claims 1 to 9, characterized in that: The positioning pin (10) is a stepped pin with an upper diameter greater than the lower diameter, and the positioning plate (9) is provided with a stepped hole that matches the positioning pin (10).