Pipe fitting detection device

Abstract

The utility model relates to the technical field of pipe fitting detection, in particular to a pipe fitting detection device, which comprises a workbench, a fixing mechanism and a first detection mechanism, the fixing mechanism is arranged on the workbench and can fix a workpiece, and the first detection mechanism is arranged on one side of the fixing mechanism along a first direction. The measuring tool comprises a first base, a first measuring tool and a first positioning piece, the first measuring tool is arranged on the first base, the first positioning piece is connected to the first measuring tool, the first positioning piece is provided with a first arc surface, and the first arc surface is consistent with an arc opening of a standard workpiece in size. The first measuring tool can measure the eccentricity of the arc opening of the workpiece. According to the pipe fitting detection device, the workpiece arc opening is attached to the first positioning piece, so that the eccentricity of the workpiece arc opening can be rapidly and accurately detected, the quality of the pipe fitting is ensured, and the lap joint and assembly requirements of subsequent procedures are met.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fitting detection, in particular to a pipe fitting detection device. Background Art

[0002] The frame is the core part of the bicycle, the basic structure of the bicycle, and the skeleton and body of the bicycle. Other parts are directly or indirectly mounted on the frame. The frame affects the correctness and comfort of the riding posture to the greatest extent. The frame is mainly composed of overlapping and assembling pipes. Therefore, the size of the pipes directly affects the overlapping and assembling of the subsequent process, thereby affecting the quality of the frame. Generally, the arc eccentricity of the pipe is determined by manual visual inspection after the pipe is formed, but slight eccentricity is not easy to be found manually, which affects the overlapping and assembling of the subsequent process and the quality of the entire frame, and easily causes the product to be scrapped. Therefore, a pipe detection device is urgently needed. Utility Model Content

[0003] The utility model aims to provide a pipe fitting detection device, which can detect the pipe fittings quickly and accurately.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The pipe fitting detection device comprises:

[0006] Workbench;

[0007] A fixing mechanism, arranged on the workbench, and used for fixing the workpiece;

[0008] A first detection mechanism is arranged on one side of the fixing mechanism along a first direction, and the first detection mechanism includes a first base, a first measuring tool and a first positioning member, the first measuring tool is arranged on the first base, the first positioning member is connected to the first measuring tool, the first positioning member has a first arc surface, the first arc surface is consistent with the arc opening size of the standard workpiece, and the first measuring tool is used to measure the eccentricity of the arc opening of the workpiece when the arc opening of the workpiece is attached to the first arc surface.

[0009] Furthermore, the pipe fitting detection device also includes a second detection mechanism, which is arranged on the other side of the fixing mechanism along the first direction, the first detection mechanism is used to measure the eccentricity of the arc opening at the first end of the workpiece, and the second detection mechanism is used to measure the eccentricity of the arc opening at the second end of the workpiece.

[0010] Furthermore, the second detection mechanism includes a second base, a second measuring tool and a second positioning member, the second positioning member is arranged on the second base, the second measuring tool is arranged on the second positioning member, the second positioning member has a second arc surface, the second arc surface is consistent with the arc opening size of the standard workpiece, and the second measuring tool is used to measure the eccentricity of the arc opening of the workpiece when the arc opening of the workpiece is attached to the second arc surface.

[0011] Furthermore, the second end of the workpiece has two arc openings, namely a positioning arc opening and an arc opening to be detected. The second positioning member includes a horizontal portion and a vertical portion. The second arc surface includes a positioning arc surface and a detection arc surface. The horizontal portion has the positioning arc surface, and the vertical portion has the detection arc surface. The horizontal portion is used to support the positioning arc opening, and the vertical portion is used to measure the eccentricity of the arc opening to be detected.

[0012] Furthermore, the position of the second positioning member on the second base along the vertical direction can be adjusted.

[0013] Furthermore, the fixing mechanism includes a first fixing seat and a clamp, the first fixing seat is arranged on the workbench, the clamp has two clamping parts, the two clamping parts are slidably arranged on the first fixing seat along the second direction, and can approach or move away from each other, and the first direction is perpendicular to the second direction.

[0014] Furthermore, the position of the first fixing seat on the workbench along the first direction can be adjusted.

[0015] Furthermore, a first slide rail is arranged on the workbench, the first slide rail is distributed along the first direction, the first fixing seat is connected with a first slider, and the first slider is slidably matched with the first slide rail.

[0016] Furthermore, a plurality of mounting holes are provided on the workpiece, and the pipe detection device also includes a third detection mechanism, which is arranged on one side of the fixing mechanism along the second direction, and the first direction is perpendicular to the second direction, and the third detection mechanism is used to measure the distance between any two of the mounting holes.

[0017] Furthermore, the third detection mechanism includes a third base and a third measuring tool, the third base is arranged on the workbench, the third measuring tool is arranged on the third base, and the third measuring tool is used to measure the distance between any two of the mounting holes.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a pipe inspection device, which includes a workbench, a fixing mechanism and a first inspection mechanism. The fixing mechanism is arranged on the workbench and can fix a workpiece. The first inspection mechanism is arranged on one side of the fixing mechanism along a first direction. The first inspection device includes a first base, a first measuring tool and a first positioning member. The first measuring tool is arranged on the first base. The first positioning member is connected to the first measuring tool. The first positioning member has a first arc surface. The first arc surface is consistent with the arc size of a standard workpiece. When the arc of the workpiece fits the first arc surface, the first measuring tool can measure the eccentricity of the arc of the workpiece. The pipe inspection device can quickly and accurately detect the eccentricity of the arc of the workpiece by fitting the arc of the workpiece with the first positioning member, thereby ensuring the quality of the pipe and meeting the requirements of the overlap assembly of the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a pipe fitting detection device provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the first detection mechanism provided by an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the fixing mechanism structure provided by an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the second detection mechanism provided in the embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the arc opening of the pipe provided in the embodiment of the utility model. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the arc opening of the pipe provided in the embodiment of the utility model. Figure 2 .

[0026] In the figure:

[0027] 1. workbench; 11. first slide rail; 12. first slide block;

[0028] 2. Fixing mechanism; 21. First fixing seat; 22. Clamp; 23. First adjusting screw; 24. Second slide rail; 25. Second slide block;

[0029] 3. First detection mechanism; 31. First base; 32. First measuring tool; 33. First positioning member;

[0030] 4. second detection mechanism; 41. second base; 42. second positioning member; 421. horizontal portion; 422. vertical portion; 43. second adjusting screw; 44. third slide rail; 45. third slide block;

[0031] 5. The third detection mechanism; 51. The third base; 52. The third measuring tool; 53. The second fixed seat; 54. The positioning pin; 55. The fourth slide rail; 56. The fourth slide block; 57. The display screen. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] Combine the following Figure 1-6 The technical solution of the utility model is further illustrated through specific implementation methods.

[0040] The embodiment of the utility model provides a pipe inspection device, which includes a workbench 1, a fixing mechanism 2 and a first inspection mechanism 3, wherein the fixing mechanism 2 is arranged on the workbench 1 and can fix the workpiece. The first inspection mechanism 3 is arranged on one side of the fixing mechanism 2 along the first direction, and includes a first base 31, a first measuring tool 32 and a first positioning member 33, wherein the first measuring tool 32 is arranged on the first base 31, the first positioning member 33 is connected to the first measuring tool 32, the first positioning member 33 has a first arc surface, the first arc surface is consistent with the size of the arc mouth of the standard workpiece, and can support the arc mouth of the workpiece, when the arc mouth of the workpiece fits the first arc surface, the first measuring tool 32 can measure the eccentricity of the arc mouth of the workpiece. Specifically, the first measuring tool 32 is reset to zero, and the workpiece to be inspected is clamped using the fixing mechanism 2, and the arc mouth of the workpiece is close to and fits with the first arc surface on the first positioning member 33, and the eccentricity of the arc mouth of the workpiece can be read from the first measuring tool 32. The pipe inspection device can quickly and accurately detect the eccentricity of the workpiece arc by fitting the workpiece arc with the first positioning member 33, thereby ensuring the quality of the pipe and meeting the requirements of the subsequent overlapping assembly process. Figure 5 and 6 The workpiece shown in the figure has an arc opening at the opening, where A represents the distance from one end of the arc opening to the center of the arc opening, and B represents the distance from the other end of the arc opening to the center of the arc opening. When A is equal to B, the arc opening is not eccentric (such as Figure 5 As shown), when A is not equal to B, the arc mouth is eccentric (as shown Figure 6After the inspection, qualified workpieces are transferred to the next process, and unqualified workpieces are removed, thus ensuring the quality of the workpieces.

[0041] like Figure 2 As shown, the first measuring tool 32 includes a first ruler and a second ruler, the first ruler is fixedly arranged on the first base 31, the second ruler is slidably arranged on the first ruler along the second direction, wherein the second direction is perpendicular to the first direction, and the first positioning member 33 is rotatably arranged on the second ruler, so that the position of the first positioning member 33 relative to the first measuring tool 32 can be adjusted. During detection, the first measuring tool 32 is first reset to zero, that is, the zero points of the first ruler and the second ruler are aligned, and the second ruler is slid along the second direction, and the position of the second ruler on the first ruler is adjusted to make the arc of the workpiece close to the first arc surface, and then the first positioning member 33 is rotated to make the arc of the workpiece close to and fit the first arc surface, and finally the offset of the zero point of the second ruler relative to the zero point of the first ruler, that is, the eccentricity of the arc of the workpiece, is read, thereby improving the detection accuracy of the eccentricity of the arc of the workpiece. Furthermore, the first positioning member 33 is detachably connected to the second ruler, and the first positioning member 33 can be replaced according to the size of the arc of the workpiece to be detected, so that the detection device can adapt to workpieces of different sizes.

[0042] Alternatively, the first measuring tool 32 is set as a digital measuring tool, the detection accuracy can reach 0.01mm, and the high-precision digital display function improves the detection accuracy. The digital measuring tool is a prior art and will not be described in detail here.

[0043] In this embodiment, the arc openings at both ends of the workpiece to be inspected have the same size, so after inspecting one end, the workpiece is rotated 180° and the first inspection mechanism 3 is used to continue inspecting the eccentricity of the arc opening at the other end.

[0044] Optionally, two groups of fixing mechanisms 2 are provided, and the two groups of fixing mechanisms 2 are arranged on the workbench 1 at intervals along the first direction, so that the workpiece can be in a more stable posture during inspection.

[0045] like Figure 3 As shown, the fixing mechanism 2 includes a first fixing seat 21 and a clamp 22. The first fixing seat 21 is arranged on the workbench 1. The clamp 22 has two clamping parts. The two clamping parts are arranged on the first fixing seat 21 along the second direction. The workpiece is clamped and fixed by the two clamping parts approaching each other, and the workpiece is removed by the two clamping parts moving away from each other. In detail, the first fixing seat 21 is provided with a first adjusting screw 23, a second slide rail 24 and a second slider 25. The second slide rail 24 and the second slider 25 are slidably matched. The two clamping parts are fixedly connected to the second slider 25. The first adjusting screw 23 is connected to the two clamping parts. By rotating the first adjusting screw 23, the two clamping parts can slide along the second direction. The operation is simple, and the two clamping parts can be brought close to or away from each other, thereby realizing the loading and unloading of the workpiece.

[0046] Optionally, the clamping part is a V-shaped piece, which has the characteristics of high strength and universality, and can be suitable for clamping workpieces of different sizes.

[0047] In order to enable the fixing mechanism 2 to adapt to the clamping of workpieces of different lengths, the position of the first fixing seat 21 along the first direction on the workbench 1 can be adjusted. Specifically, a first slide rail 11 is provided on the workbench 1, and the first slide rail 11 is distributed along the first direction. The first fixing seat 21 is connected to the first slider 12. The first slide rail 11 and the first slider 12 are slidably matched. According to the length of the workpiece to be detected, the first fixing seat 21 is slid on the first slide rail 11 to achieve the clamping of the workpiece. Optionally, two first slide rails 11 are provided, and the first slider 12 is arranged one-to-one with the first slide rail 11. The use of a double-line slide rail can reduce the shaking caused by the assembly of the detection device and improve the stability during workpiece detection.

[0048] Furthermore, the first detection mechanism 3 is slidably connected to the first slide rail 11. The first detection mechanism 3 slides on the first slide rail 11, so that the first arc surface fits better with the arc opening of the workpiece, thereby improving the accuracy of detection.

[0049] The pipe inspection device also includes a second inspection mechanism 4. If the arc openings at both ends of the workpiece to be inspected are different, the first inspection mechanism 3 is used to inspect the arc opening eccentricity of the first end of the workpiece, and then the second inspection mechanism 4 is used to inspect the arc opening eccentricity of the second end of the workpiece.

[0050] like Figure 4 As shown, the second detection mechanism 4 includes a second base 41, a second measuring tool and a second positioning member 42. The second positioning member 42 is arranged on the second base 41, and the second measuring tool is arranged on the second positioning member 42. The second positioning member 42 has a second arc surface, and the second arc surface is consistent with the size of the arc opening of the standard workpiece, and can support the arc opening of the workpiece. When the arc opening of the workpiece fits on the second arc surface, the second measuring tool can measure the eccentricity of the arc opening of the workpiece. Specifically, the arc opening of the workpiece is brought close to and fits with the second arc surface on the second positioning member 42, and the eccentricity of the arc opening of the workpiece can be read from the second measuring tool. Furthermore, the second positioning member 42 is detachably connected to the second base 41, and the second positioning member 42 can be replaced according to the size of the arc opening of the workpiece to be detected, so that the detection device can adapt to workpieces of different sizes.

[0051] Furthermore, the second positioning member 42 is rotatably disposed on the second base 41 . During detection, the second arc surface and the arc opening of the workpiece can be completely fitted by rotating the second positioning member 42 , thereby improving the detection accuracy of the eccentricity of the arc opening of the workpiece.

[0052] Furthermore, the position of the second positioning member 42 on the second base 41 along the vertical direction can be adjusted, and the second detection mechanism 4 also includes a second adjustment screw 43, a third slide rail 44 and a third slider 45. The third slide rail 44 and the third slider 45 are slidably matched, and the second positioning member 42 is fixedly connected to the third slider 45. The second adjustment screw 43 is connected to the third slider 45. The screw and slide rail structure can reduce the shaking of the detection device during the detection process. By rotating the second adjustment screw 43, the second positioning member 42 can slide along the vertical direction, thereby achieving the fit between the second positioning member 42 and the second arc surface, thereby improving the detection accuracy.

[0053] Optionally, the second end of the workpiece has two arc openings, which are the positioning arc opening and the arc opening to be detected. The second positioning member 42 includes a horizontal portion 421 and a vertical portion 422. The vertical portion 422 is arranged on the horizontal portion 421. The horizontal portion 421 is rotatably arranged on the second base. The second arc surface includes a positioning arc surface and a detection arc surface. The horizontal portion 421 has a positioning arc surface, and the vertical portion 422 has a detection arc surface. The horizontal portion 421 can support the positioning arc opening of the workpiece, and the vertical portion 422 can detect the eccentricity of the arc opening to be detected of the workpiece. During detection, the second adjusting screw 43 is rotated to make the positioning arc surface fit with the positioning arc opening on the workpiece, and the horizontal portion 421 is rotated to make the detection arc surface close to the arc opening to be detected on the workpiece, so that the workpiece is accurately positioned during detection.

[0054] In this embodiment, a scale is provided on the horizontal portion 421 of the second positioning member 42, and the second measuring tool is a scale provided on the second positioning member 42, and the zero point of the second measuring tool is aligned with the center of the detection arc surface on the vertical portion 422 in the horizontal direction. After the two arc openings of the workpiece are fitted with the positioning arc surface and the detection arc surface, the values ​​on the second measuring tool corresponding to the two sides of the positioning arc are read, which are the eccentricity of the arc opening to be detected.

[0055] In this embodiment, a plurality of mounting holes are provided on the workpiece, and the pipe detection device further includes a third detection mechanism 5, which is provided on one side of the fixing mechanism 2 along the second direction, and the third detection mechanism 5 can measure the distance between any two mounting holes. Specifically, the third detection mechanism 5 includes a third base 51 and a third measuring tool 52, the third base 51 is provided on the workbench 1, the third measuring tool 52 is provided on the third base 51, and the third measuring tool 52 can measure the distance between any two mounting holes.

[0056] In this embodiment, two mounting holes are provided on the workpiece, and whether the distance between the mounting holes is qualified can be quickly determined by measuring whether the two mounting holes are eccentric. In detail, the third detection mechanism 5 also includes a second fixed seat 53 and a positioning pin 54, the second fixed seat 53 is provided on the third base 51, the size of the positioning pin 54 matches the size of the mounting hole on the workpiece, the positioning pin 54 is provided in two, and the two positioning pins 54 are provided on the second fixed seat 53. During the detection, if the two positioning pins 54 can be easily inserted into the mounting holes on the workpiece, the two mounting holes are not eccentric, and the third measuring tool 52 is used to measure the distance between the mounting holes. If the two positioning pins 54 cannot be easily inserted into the mounting holes on the workpiece, the eccentricity of the two mounting holes exceeds the range, and there is no need to measure the distance between the mounting holes. Furthermore, a guide sleeve is provided on the positioning pin 54, which can prevent the positioning pin 54 from shaking during use and improve the stability of the detection.

[0057] In order to make the third detection mechanism 5 suitable for different workpieces, the distance of the second fixed seat 53 on the third base 51 along the first direction can be adjusted. In detail, the third detection mechanism 5 also includes a fourth slide rail 55 and a fourth slider 56, the fourth slide rail 55 and the fourth slider 56 are slidably matched, the second fixed seat 53 is fixedly connected to the fourth slider 56, and the position of the second fixed seat 53 on the third base 51 is adjusted by sliding the second fixed seat 53, so that the third detection mechanism 5 is suitable for detecting the eccentricity of the mounting holes on different workpieces.

[0058] Furthermore, in this embodiment, the third measuring tool 52 is a grating ruler, which has high measurement accuracy and wide measurement range. The grating ruler is a prior art and will not be described in detail here. The third detection mechanism 5 also includes a display screen 57, which is connected to the grating ruler, and the distance between the mounting holes on the workpiece can be quickly read from the display screen 57.

[0059] The following takes the bicycle middle pipe as an example to explain in detail the detection method of the pipe detection device provided by the embodiment of the utility model. The two ends of the bicycle middle pipe need to be overlapped and assembled with other pipes. The first end has an arc opening, which is the front arc opening, and the second end has two arc openings, which are the five-way arc opening and the middle pipe arc opening, respectively. The middle pipe is provided with two kettle bolt holes for installing kettles. Specifically:

[0060] Select the corresponding first positioning member 33 and second positioning member 42 according to the size of the arc openings at both ends of the middle tube, rotate the first adjusting screw 23, and clamp the middle tube. After clamping, first use the first detection mechanism 3 to detect the eccentricity of the arc opening of the vehicle head, reset the first measuring tool 32, slide the first detection mechanism 3 in the first direction to make the first positioning member 33 close to the arc opening of the vehicle head, adjust the position of the first positioning member 33 to make the first arc surface fit the arc opening of the vehicle head, and read the eccentricity of the arc of the vehicle head from the first measuring tool 32; then use the second detection mechanism 4 to detect the eccentricity of the arc opening of the middle tube, slide the second positioning member 42 in the vertical direction to make the positioning arc surface close to the arc opening of the five-way, and rotate. Move the second positioning piece 42 to make the detection arc surface fit with the arc opening of the middle tube, and read the eccentricity of the arc opening of the middle tube from the second measuring tool; finally, use the third detection mechanism 5 to measure the length of the kettle bolt hole, and insert the positioning pin 54 into the kettle bolt hole. If the two positioning pins 54 can be easily inserted into the kettle bolt hole, and then use the third measuring tool 52 to measure the length of the kettle bolt hole, the detection of the bicycle middle tube can be completed. The detection device is simple and convenient to operate, with high detection accuracy, which ensures the quality of the pipe fittings and meets the overlap assembly requirements of the subsequent process.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A pipe inspection device, characterized in that: include: Workbench (1); A fixing mechanism (2) is arranged on the workbench (1), and the fixing mechanism (2) is used to fix the workpiece; A first detection mechanism (3) is arranged on one side of the fixing mechanism (2) along a first direction, the first detection mechanism comprises a first base (31), a first measuring tool (32) and a first positioning member (33), the first measuring tool (32) is arranged on the first base (31), the first positioning member (33) is connected to the first measuring tool (32), the first positioning member (33) has a first arc surface, the first arc surface is consistent with the arc opening size of a standard workpiece, and the first measuring tool (32) is used to measure the eccentricity of the arc opening of the workpiece when the arc opening of the workpiece is attached to the first arc surface.

2. The pipe inspection device according to claim 1, characterized in that: The pipe inspection device further comprises a second inspection mechanism (4), wherein the second inspection mechanism (4) is arranged on the other side of the fixing mechanism (2) along the first direction, the first inspection mechanism (3) is used to measure the eccentricity of the arc opening at the first end of the workpiece, and the second inspection mechanism (4) is used to measure the eccentricity of the arc opening at the second end of the workpiece.

3. The pipe inspection device according to claim 2, characterized in that: The second detection mechanism (4) comprises a second base (41), a second measuring tool and a second positioning member (42), wherein the second positioning member (42) is arranged on the second base (41), the second measuring tool is arranged on the second positioning member (42), the second positioning member (42) has a second arc surface, the second arc surface is consistent with the arc opening size of the standard workpiece, and the second measuring tool is used to measure the eccentricity of the arc opening of the workpiece when the arc opening of the workpiece is in contact with the second arc surface.

4. The pipe inspection device according to claim 3, characterized in that: The second end of the workpiece has two arc openings, namely a positioning arc opening and an arc opening to be detected. The second positioning member (42) includes a horizontal portion (421) and a vertical portion (422). The second arc surface includes a positioning arc surface and a detection arc surface. The horizontal portion (421) has the positioning arc surface, and the vertical portion (422) has the detection arc surface. The positioning arc surface is used to support the positioning arc opening, and the detection arc surface is used to support the arc opening to be detected.

5. The pipe inspection device according to claim 3, characterized in that: The position of the second positioning member (42) on the second base (41) along the vertical direction can be adjusted.

6. The pipe inspection device according to claim 1, characterized in that: The fixing mechanism (2) comprises a first fixing seat (21) and a clamp (22), wherein the first fixing seat (21) is arranged on the workbench (1), and the clamp (22) has two clamping parts, and the two clamping parts are slidably arranged on the first fixing seat (21) along a second direction and can approach or move away from each other, and the first direction is perpendicular to the second direction.

7. The pipe inspection device according to claim 6, characterized in that: The position of the first fixing seat (21) on the workbench (1) along the first direction can be adjusted.

8. The pipe inspection device according to claim 7, characterized in that: The workbench (1) is provided with a first slide rail (11), the first slide rail (11) is distributed along the first direction, the first fixed seat (21) is connected with a first slider (12), and the first slider (12) is slidably matched with the first slide rail (11).

9. The pipe inspection device according to claim 2, characterized in that: The workpiece is provided with a plurality of mounting holes, and the pipe detection device further comprises a third detection mechanism (5), wherein the third detection mechanism (5) is arranged on one side of the fixing mechanism (2) along a second direction, the first direction being perpendicular to the second direction, and the third detection mechanism (5) is used to measure the distance between any two of the mounting holes.

10. The pipe inspection device according to claim 9, characterized in that: The third detection mechanism (5) comprises a third base (51) and a third measuring tool (52); the third base (51) is arranged on the workbench (1); the third measuring tool (52) is arranged on the third base (51); and the third measuring tool (52) is used to measure the distance between any two of the mounting holes.

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