Device for detecting inner diameter of plastic pipe fitting

Abstract

The invention relates to the technical field of inner diameter detection, and particularly discloses a plastic pipe inner diameter detection device which comprises a base and a mounting table fixedly mounted at the top of the base, a mounting cylinder is fixedly mounted at the top of the mounting table, a triangular guide mechanism is arranged at the position, on the right side of the mounting cylinder, of the top of the base, and a multi-point outer clamping mechanism is arranged on the mounting cylinder. A follow-up guide mechanism and an inner supporting concentric mechanism are arranged between the triangular guide mechanism and the multi-point outer clamping mechanism, and the multi-point outer clamping mechanism comprises two clamping assemblies and a supporting assembly, the two clamping assemblies are in bilateral symmetry, and the supporting assembly is arranged on the inner wall of the bottom of the mounting cylinder and used for containing pipe fittings. The second guide rod can accurately guide the guide sleeve and the detection probe, and the guide effect ensures that the detection probe is always kept coaxial with the inner wall of the pipe fitting in the measurement process, so that the accuracy and reliability of subsequent measurement are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inner diameter detection, and more particularly to an inner diameter detection device for a plastic pipe fitting. Background Art

[0002] Plastic pipe fittings are accessories used to connect or change the direction, branch or terminate plastic pipes. They are widely used in building and construction, the chemical industry, agricultural irrigation and other fields. In some systems with strict requirements on fluid transmission performance, such as medical equipment, food processing, chemical production, etc., the consistency and accuracy of the inner diameter of the pipe fittings are crucial to ensure the normal operation of the system. Therefore, the inner diameter of the pipe fittings needs to be precisely tested.

[0003] At present, the internal diameter detection devices of plastic pipe fittings generally include: vernier calipers, internal micrometers, gauges, internal diameter measuring instruments and optical imaging measurement systems. Among them, internal diameter measuring instruments integrate multiple high-precision laser displacement sensors on the probe (stationary or rotatable), which can measure data at multiple points simultaneously, thereby quickly obtaining the contour of the inner surface of the pipe fitting. However, the current internal diameter measuring instruments still have certain defects:

[0004] First, the current internal diameter measuring instrument uses a screw or cylinder to drive the detection probe into the pipe for measurement. However, in this process, the height of the detection probe needs to be adjusted to match the different diameters of the pipe. After adjustment, the coaxiality of the detection probe and the pipe is difficult to maintain complete consistency, which may affect the detection accuracy. In addition, due to the lack of a guidance system, the movement path of the probe is easily affected by external factors, resulting in increased measurement errors.

[0005] Secondly, current internal diameter gauges typically use a chuck fixture to clamp the pipe from the outside to secure it to the measuring platform. However, due to the limited number of clamping points, the clamping force is concentrated in a few locations and cannot be evenly distributed across the entire pipe. This can cause the pipe to easily shift or wobble during measurement, especially when measuring long pipes or large diameter pipes, where the clamping force is insufficient to maintain the pipe's stability.

[0006] Finally, when the internal diameter detector is currently fixing the pipe, the clamping force is concentrated on the outer wall of the pipe and the pressure applied to the outer wall of the pipe at the clamping point is strong. At this time, due to the deformable characteristics of the pipe wall of the plastic pipe, if the clamping force is not well controlled, the pipe may be deformed during the measurement process, affecting the accuracy of the measurement. Summary of the Invention

[0007] The present invention provides a device for detecting the inner diameter of a plastic pipe fitting, which solves the technical problems in the prior art that the coaxiality of a detection probe and the pipe fitting is difficult to maintain completely consistent and the clamping force cannot be evenly distributed on the entire pipe fitting.

[0008] The present invention provides a device for detecting the inner diameter of plastic pipe fittings, comprising a base and a mounting platform fixedly mounted on the top of the base, a mounting tube fixedly mounted on the top of the mounting platform, a triangular guide mechanism provided on the top of the base, located on the right side of the mounting tube, a multi-point external clamping mechanism provided on the mounting tube, a follow-up guide mechanism and an inner support concentric mechanism provided between the triangular guide mechanism and the multi-point external clamping mechanism, the multi-point external clamping mechanism comprising two left-right symmetrical clamping assemblies and a support assembly provided on the inner wall of the bottom of the mounting tube and used for placing the pipe fittings, the follow-up guide mechanism comprising a plurality of circumferentially distributed interpenetrating guide assemblies and a plurality of follow-up adjustment assemblies, the follow-up adjustment assembly adaptively adjusting the position of the interpenetrating guide assembly as the clamping assembly on the right moves.

[0009] The triangular guide mechanism includes a guide sleeve located on the right side of the mounting tube and concentric with the mounting tube, a detection probe is fixedly installed in the guide sleeve, the follow-up adjustment assembly includes an adjustment plate fixedly installed on the outside of the guide sleeve, an adjustment groove is provided on the side of the adjustment plate away from the axis of the mounting tube, and the interlaced guide assembly includes a guide rod 2 slidably connected in the adjustment groove and a guide plate fixedly installed on the inner wall of the mounting tube, and a guide groove is provided on the guide plate that slides with the guide rod 2.

[0010] After the triangular guide mechanism clamps the pipe fitting, the guide sleeve drives the guide rod 2 to pass through the guide groove, and the triangular guide mechanism is locked and fixed under the limit of the guide groove, so that the pipe fitting and the detection probe are concentric.

[0011] Furthermore, the triangular guide mechanism also includes an M-shaped plate fixedly mounted on the top of the base and located on the right side of the mounting tube. A screw rod is rotatably installed between the M-shaped plate and the mounting tube. The guide sleeve is composed of a middle ring and three extension sleeves extending from the outside of the ring. The lower extension sleeve is threadedly connected to the outside of the screw rod.

[0012] Furthermore, two guide rods 1 are installed between the mounting tube and the M-shaped plate, which are symmetrical in front and back and slidingly connected to the two extension sleeves above. The guide rod 1 is located above the screw rod, and a triangular support structure is formed between the two guide rods 1 and the screw rod.

[0013] Furthermore, a control motor is fixedly installed on the right side of the M-shaped plate, and the output shaft of the control motor rotates through the M-shaped plate and is fixedly connected to the screw rod.

[0014] Furthermore, the clamping assembly includes a control ring rotatably mounted on the end face of the mounting tube and concentric with the mounting tube, a plurality of circumferentially distributed arc grooves are opened on the control ring, a control sleeve is rotatably mounted between the left and right inner walls of the arc groove, a plurality of circumferentially distributed fixed plates are fixedly mounted on the outside of the mounting tube, a control rod slidably connected to the control sleeve is rotatably mounted on the side of the fixed plate close to the control ring, a guide tube slidably matched with the guide rod 2 is fixedly mounted on the outside of the control rod, and the guide rod 2 passes through the guide tube and the guide groove from right to left in sequence.

[0015] Furthermore, a clamping roller is rotatably mounted between the two control rods on the left and right sides, and a reinforcing rod is fixedly mounted between the two control rods on the left and right sides.

[0016] Furthermore, the support assembly includes a plurality of support frames fixedly mounted on the inner wall of the bottom of the mounting cylinder, support rollers are rotatably mounted between the front and rear inner walls of the support frames, and the plurality of support frames are evenly spaced from left to right.

[0017] Furthermore, the inner support concentric mechanism includes an inner support assembly and a driving assembly for driving the inner support assembly to expand the inner wall of the supporting pipe. The inner support assemblies are evenly arranged in three along the circumference of the collar, including two mounting plates fixedly mounted on one side of the collar close to the mounting tube and symmetrical to each other, and two driving rods sliding through the mounting plates. The two driving rods are symmetrically distributed on both sides of the two mounting plates. A scissors arm group is hinged between the two mounting plates and the two driving rods, and an inner support plate is fixedly mounted on the side of the scissors arm group away from the driving rod.

[0018] Furthermore, three drive assemblies are evenly arranged along the circumference of the collar, and the drive assembly includes a collar plate fixedly mounted on the outside of the collar, a reset spring fixedly mounted on the side of the collar plate close to the scissors arm group, a reset plate fixedly mounted on the end of the reset spring away from the collar plate, a sliding rod sliding through the collar plate fixedly mounted on the side of the reset plate close to the collar plate, and a driving plate fixedly mounted on the end of the sliding rod away from the reset plate and fixedly connected to the two driving rods.

[0019] Furthermore, a limit rod sliding through the drive plate is fixedly installed on the side of the sleeve plate close to the drive plate, and a limit plate is provided on the end of the limit rod away from the sleeve plate. A reset frame cooperating with the reset plate is fixedly installed on the outside of the installation tube.

[0020] The beneficial effects of the present invention are: 1. In the present application, under the guidance of the guide groove and the guide cylinder, the guide rod 2 can accurately guide the guide sleeve and the detection probe. The guiding effect ensures that the detection probe always remains coaxial with the inner wall of the pipe during the measurement process, and keeps the detection probe consistent with the central axis of the pipe, thereby greatly improving the accuracy and reliability of subsequent measurements. At the same time, the cooperation between the guide rod 2 and the guide groove can also play a locking and strengthening role for the guide cylinder, further enhancing the stability of the clamping roller on the pipe, and a tight guiding system is formed between the guide groove, the guide rod 2 and the guide cylinder, ensuring the stability and consistency of the entire measurement process.

[0021] 2. In this application, the guide groove, the guide rod 2 and the guide tube are in a straight line, so that the central axes of the installation tube, the pipe fitting and the detection probe are consistent, ensuring that the detection probe can maintain strict coaxiality with the pipe fitting during the measurement process, eliminating the measurement error caused by external force factors, and ensuring the high accuracy of the measurement results.

[0022] 3. In the present application, the guide sleeve is used to move the detection probe into the pipe fitting, and the inner support plate is synchronously driven to move toward the inner wall of the pipe fitting and tighten the inner wall of the pipe fitting. The internal support force provided by the inner support plate further ensures that the inner wall of the pipe fitting and the detection probe always remain coaxial, thereby further fixing the pipe fitting and further improving the coaxiality between the installation tube, the pipe fitting and the detection probe.

[0023] 4. In the present application, when clamping the pipe, the two clamping rollers below the multi-point external clamping mechanism will first lift the pipe placed on top of the support roller and move it closer to the upper clamping roller, and finally the three clamping rollers will clamp the pipe so that the pipe is clamped in a state consistent with the central axis of the installation tube. At the same time, the contact area between the three clamping rollers and the entire pipe is large, and the clamping force is evenly distributed on the entire pipe, thereby greatly improving the stability of the external clamping. By controlling the rotation angle of the control ring, clamping detection can be achieved for pipes of different diameters, and the central axes of the pipe, installation tube and detection probe can always be kept consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the multi-point external clamping mechanism, the guide rod 1 and the M-shaped plate part of the present invention.

[0026] Figure 3 This invention Figure 2 A partial enlarged view of part A.

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the follower guide mechanism, the inner support concentric mechanism, the clamping roller, the control sleeve and the control rod of the present invention.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the mounting ring, arc groove, support frame, mounting platform and support roller of the present invention.

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the fixing plate, control sleeve, control rod and reinforcing rod of the present invention.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the detection probe, inner support plate, adjustment plate, guide sleeve and adjustment slot of the present invention.

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the sliding rod, driving plate, limiting rod, return spring and guide sleeve of the present invention.

[0032] Figure 9It is a schematic diagram of the three-dimensional structure of the guide rod 2, the guide cylinder, the guide groove, the adjustment plate and the control sleeve of the present invention.

[0033] In the figure: 1. Base; 2. Mounting table; 3. Triangular guide mechanism; 4. Multi-point external clamping mechanism; 5. Follow-up guide mechanism; 6. Internal support concentric mechanism; 7. Mounting cylinder; 8. Control motor; 9. Pipe fitting; 10. Detection probe; 301. M-shaped plate; 302. Screw rod; 303. Guide rod 1; 304. Guide sleeve; 401. Clamping assembly; 402. Support assembly; 403. Reinforcement rod; 404. Clamping roller; 4011. Control ring; 4012. Control sleeve; 4013. Fixing plate; 4014. Control rod; 4015. Arc groove; 4021. Support frame; 402 2. Support roller; 501. Interlaced guide assembly; 502. Follow-up adjustment assembly; 5011. Guide rod 2; 5012. Guide plate; 5013. Guide groove; 5014. Guide cylinder; 5021. Adjustment plate; 5022. Adjustment groove; 601. Inner support assembly; 602. Drive assembly; 6011. Mounting plate; 6012. Drive rod; 6013. Scissor arm assembly; 6014. Inner support plate; 6021. Sleeve plate; 6022. Reset spring; 6023. Reset plate; 6024. Slide rod; 6025. Drive plate; 6026. Limit rod; 6027. Reset frame. DETAILED DESCRIPTION

[0034] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be varied without departing from the scope of protection of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0035] See Figure 1 、 Figure 2 and Figure 4In this embodiment, a plastic pipe inner diameter detection device is proposed, including a base 1 and a mounting platform 2 fixedly mounted on the top of the base 1, a mounting cylinder 7 fixedly mounted on the top of the mounting platform 2, a triangular guide mechanism 3 is provided on the top of the base 1, located on the right side of the mounting cylinder 7, a multi-point external clamping mechanism 4 is provided on the mounting cylinder 7, a follow-up guide mechanism 5 and an inner support concentric mechanism 6 are provided between the triangular guide mechanism 3 and the multi-point external clamping mechanism 4, the multi-point external clamping mechanism 4 includes two left-right symmetrical clamping components 401 and a support component 402 arranged on the inner wall of the bottom of the mounting cylinder 7 and used to place the pipe 9, the follow-up guide mechanism 5 includes a plurality of circumferentially distributed interlaced guide components 501 and a plurality of follow-up adjustment components 502, the follow-up adjustment component 502 adaptively adjusts the position of the interlaced guide component 501 as the clamping component 401 on the right moves, and the inner support concentric mechanism 6 includes an inner support component 601 and a driving component 602 for driving the inner support component 601 to expand and support the inner wall of the pipe 9.

[0036] See Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The clamping assembly 401 includes a control ring 4011 rotatably mounted on the end face of the mounting tube 7 and concentric with the mounting tube 7. A plurality of circumferentially distributed arcuate grooves 4015 are provided on the control ring 4011. A control sleeve 4012 is rotatably mounted between the left and right inner walls of the arcuate groove 4015. A plurality of circumferentially distributed fixing plates 4013 are fixedly mounted on the outer side of the mounting tube 7. A control rod 4014 slidably connected to the control sleeve 4012 is rotatably mounted on the fixing plate 4013 close to the control ring 4011.

[0037] See Figure 6 A clamping roller 404 is rotatably installed between the two control rods 4014 on the left and right sides, and a reinforcing rod 403 is fixedly installed between the two control rods 4014 on the left and right sides.

[0038] See Figure 5 and Figure 6 The support assembly 402 includes several support frames 4021 fixedly mounted on the inner wall of the bottom of the mounting cylinder 7, and a support roller 4022 is rotatably mounted between the front and rear inner walls of the support frames 4021. The several support frames 4021 are evenly spaced from left to right.

[0039] During specific use, the pipe 9 to be inspected is first placed on the top of the support roller 4022, and then the two control rings 4011 are driven to rotate by an external power supply. The rotation of the control ring 4011 drives the control sleeve 4012 to toggle the control rod 4014 to rotate, and then drives the two control rods 4014 opposite to each other on the left and right sides to rotate synchronously and gradually toward the side close to the pipe 9, so that the control rod 4014 drives the clamping roller 404 to approach the pipe 9 synchronously, thereby making the three clamping rollers 404 approach the pipe 9 synchronously. In this process, the two lower clamping rollers 404 will first lift the pipe 9 placed on the top of the support roller 4022 and approach the upper clamping roller 404, and finally make the three clamping rollers 404 clamp the pipe 9, so that the pipe 9 is clamped in a state consistent with the central axis of the mounting tube 7, and the clamping detection of pipes 9 of different diameters can be achieved by controlling the rotation angle of the control ring 4011.

[0040] See Figure 1 、 Figure 2 、 Figure 4 and Figure 7 The triangular guide mechanism 3 includes a guide sleeve 304 located on the right side of the mounting tube 7 and concentric with the mounting tube 7. A detection probe 10 is fixedly installed in the guide sleeve 304. The follow-up adjustment component 502 includes an adjustment plate 5021 fixedly installed on the outside of the guide sleeve 304. An adjustment groove 5022 is provided on the side of the adjustment plate 5021 away from the axis of the mounting tube 7.

[0041] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 9 The insertion guide assembly 501 includes a guide rod 5011 slidably connected to the adjustment groove 5022 and a guide plate 5012 fixedly mounted on the inner wall of the mounting tube 7. The guide plate 5012 is provided with a guide groove 5013 that slides with the guide rod 5011. A guide tube 5014 that slides with the guide rod 5011 is fixedly mounted on the outer side of the control rod 4014. When the guide sleeve 304 moves to the left, the detection probe 10 moves to the left. During the process, the guide rod 2 5011 passes through the guide tube 5014 and the guide groove 5013 from right to left in sequence. The guide groove 5013 is composed of a plurality of alternating arc-shaped openings. The diameter of a single arc-shaped opening matches the diameter of the guide rod 2 5011. When the guide rod 2 5011 is inserted into the single arc-shaped opening, the arc-shaped opening limits and locks the guide rod 2 5011 circumferentially and radially to prevent the guide rod 2 5011 from falling out of the arc-shaped opening.

[0042] See Figure 1 、 Figure 2 and Figure 4The triangular guide mechanism 3 also includes an M-shaped plate 301 fixedly mounted on the top of the base 1 and located on the right side of the mounting tube 7. A screw rod 302 is rotatably installed between the M-shaped plate 301 and the mounting tube 7. The guide sleeve 304 is composed of a middle ring and three extension sleeves extending from the outside of the ring. The lower extension sleeve is threadedly connected to the outside of the screw rod 302.

[0043] See Figure 1 、 Figure 2 and Figure 4 Two guide rods 303 are installed between the mounting tube 7 and the M-shaped plate 301, which are symmetrical in front and back and slidingly connected to the two extension sleeves above. The guide rods 303 are located above the screw rod 302, and a triangular support structure is formed between the two guide rods 303 and the screw rod 302. A control motor 8 is fixedly installed on the right side of the M-shaped plate 301, and the output shaft of the control motor 8 rotates through the M-shaped plate 301 and is fixedly connected to the screw rod 302.

[0044] During specific use, when the control rod 4014 on the right side gradually rotates toward the side close to the pipe fitting 9, it will drive the guide cylinder 5014 to move synchronously, thereby driving the guide rod 2 5011 in the guide cylinder 5014 to move synchronously (at this time, the guide rod 2 5011 is not inserted into the guide groove 5013), and then drive the end of the guide rod 2 5011 located in the adjustment groove 5022 to move synchronously, thereby achieving that when the control rod 4014 moves to drive the clamping roller 404 to clamp the pipe fitting 9, the guide rod 2 5011 moves accordingly, so as to facilitate the subsequent locking of the control rod 4014 and the clamping roller 404 and the horizontal guidance of the detection probe 10, thereby improving the coaxiality of the detection probe 10 and the pipe fitting 9 and keeping the detection probe 10 consistent with the central axis of the pipe fitting 9.

[0045] After the three clamping rollers 404 clamp the pipe 9, the control motor 8 is started, and the output shaft of the control motor 8 rotates to drive the screw 302 to rotate, thereby driving the guide sleeve 304 to move to the side close to the installation cylinder 7 under the guidance of the guide rod 1 303. During this process, the guide rod 2 5011 moves to the left along the guide groove 5013 and the guide cylinder 5014. During this process, under the guidance of the guide groove 5013 and the guide cylinder 5014, the guide rod 2 5011 can accurately guide the guide sleeve 304 and the detection probe 10. The guiding effect ensures that the detection probe 10 always maintains a coaxial state with the inner wall of the pipe 9 during the measurement process, and keeps the detection probe 10 consistent with the central axis of the pipe 9, thereby The accuracy and reliability of subsequent measurements are greatly improved. At the same time, the cooperation between the guide rod 2 5011 and the guide groove 5013 can also play a circumferential and radial locking reinforcement role on the guide cylinder 5014. The locking mechanism ensures that the guide sleeve 304 will not deviate or shake during the movement, further enhancing the stability of the clamping roller 404 on the pipe 9. Therefore, the guide groove 5013, the guide rod 2 5011 and the guide cylinder 5014 are collinear, so that the central axes of the installation cylinder 7, the pipe 9 and the detection probe 10 are consistent, ensuring that the detection probe 10 can maintain strict coaxiality with the pipe 9 during the measurement process, eliminating the measurement error caused by external force factors, and ensuring the high accuracy of the measurement results.

[0046] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 and Figure 8 There are three inner support assemblies 601 evenly arranged along the circumference of the collar, including two mounting plates 6011 fixedly mounted on one side of the collar close to the mounting tube 7 and symmetrical to each other, and two driving rods 6012 sliding through the mounting plates 6011, the two driving rods 6012 are symmetrically distributed on both sides of the two mounting plates 6011, a scissor arm group 6013 is hinged between the two mounting plates 6011 and the two driving rods 6012, and an inner support plate 6014 is fixedly mounted on the side of the scissor arm group 6013 away from the driving rod 6012.

[0047] See Figure 2 、 Figure 3 、 Figure 7 and Figure 8, the driving components 602 are evenly arranged with three along the circumference of the collar, the driving component 602 includes a sleeve plate 6021 fixedly mounted on the outside of the sleeve, a reset spring 6022 is fixedly mounted on the side of the sleeve plate 6021 close to the scissor arm group 6013, and a reset plate 6023 is fixedly mounted on the end of the reset spring 6022 away from the sleeve plate 6021, and a sliding rod 6024 is fixedly mounted on the side of the reset plate 6023 close to the sleeve plate 6021, and a driving plate 6025 fixedly connected to the two driving rods 6012 is fixedly mounted on the end of the sliding rod 6024 away from the reset plate 6023, and a limiting rod 6026 is fixedly mounted on the side of the sleeve plate 6021 close to the driving plate 6025, and a limiting plate is provided on the end of the limiting rod 6026 away from the sleeve plate 6021, and a reset frame 6027 cooperating with the reset plate 6023 is fixedly mounted on the outside of the mounting tube 7.

[0048] When in use, as the guide sleeve 304 drives the guide rod 2 5011 to move leftward along the guide groove 5013 and the guide cylinder 5014, when the reset plate 6023 contacts the reset frame 6027, the guide sleeve 304 continues to move, which drives the reset plate 6023 to squeeze the reset frame 6027 to generate a rightward thrust, thereby driving the slide rod 6024 to move away from the installation cylinder 7 and compressing the reset spring 6022. The slide rod 6024 moves through the drive plate 6025 to drive the two drive rods 6012 to move synchronously, thereby driving the scissor arm assembly 6013 unfolds, thereby driving the inner support plate 6014 to move toward the inner wall of the pipe 9 until the inner wall of the pipe 9 is tightened. At this time, the detection probe 10 is already in the pipe 9 and is ready to measure the inner diameter. Then the control motor 8 is stopped. The internal support force provided by the inner support plate 6014 further ensures that the inner wall of the pipe 9 and the detection probe 10 always remain coaxial, thereby further fixing the pipe 9 and further improving the coaxiality between the mounting tube 7, the pipe 9 and the detection probe 10. Finally, the inner diameter of the pipe 9 is measured by the detection probe 10.

[0049] When the measurement is completed, the control motor 8 is started to drive the screw rod 302 to rotate, driving the guide sleeve 304 to move away from the installation cylinder 7. As the guide sleeve 304 moves, the guide rod 2 5011 slides to the right along the guide groove 5013 and the guide cylinder 5014. In this process, first, as the moving sleeve plate 6021 of the guide sleeve 304 gradually moves away from the installation cylinder 7, the pressure on the reset spring 6022 gradually decreases and begins to reset. During the reset process of the reset spring 6022, the guide sleeve 304 drives the mounting plate 6011 to move away from the installation cylinder 7, so that the scissor arm group 6013 is reset. Folding and resetting, thereby driving the inner support plate 6014 to move and reset to the side away from the inner wall of the pipe 9. When the reset spring 6022 is fully reset, the guide sleeve 304 continues to move to move the inner support plate 6014 out of the pipe 9 until the guide rod 2 5011 is pulled out from the guide cylinder 5014 to complete the unlocking of the right control rod 4014. Finally, the control ring 4011 is controlled to rotate, and the control rod 4014 is driven by the control sleeve 4012 to rotate to the side away from the pipe 9 and finally detach from the pipe 9. The pipe 9 falls on the top of the support roller 4022 and is then taken out to wait for the next inspection.

[0050] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A device for detecting the inner diameter of a plastic pipe, characterized in that: include: A base and a mounting tube arranged on the top of the base, a triangular guide mechanism is arranged on the top of the base, a multi-point external clamping mechanism is arranged on the mounting tube, and a follow-up guide mechanism and an inner support concentric mechanism are arranged between the triangular guide mechanism and the multi-point external clamping mechanism; The multi-point external clamping mechanism includes two symmetrical clamping assemblies and a support assembly for placing pipe fittings. The follow-up guide mechanism includes several circumferentially distributed interpenetrating guide assemblies and several follow-up adjustment assemblies. The follow-up adjustment assembly adaptively adjusts the position of the interpenetrating guide assembly as the clamping assembly on one side moves. The triangular guide mechanism includes a guide sleeve concentric with the mounting tube, a detection probe is fixedly installed in the guide sleeve, a follow-up adjustment assembly includes an adjustment plate fixedly mounted on the guide sleeve, an adjustment slot is opened on one side of the adjustment plate, and an interlaced guide assembly includes a second guide rod slidably connected in the adjustment slot and a guide plate fixedly mounted on the mounting tube, and a guide slot is opened on the guide plate to slide with the second guide rod; After the triangular guide mechanism clamps the pipe fitting, the guide sleeve drives the guide rod 2 to pass through the guide groove, and the triangular guide mechanism is locked and fixed under the limit of the guide groove, so that the pipe fitting and the detection probe are concentric.

2. A plastic pipe inner diameter detection device according to claim 1, characterized in that: The triangular guide mechanism also includes an M-shaped plate fixedly mounted on the top of the base and located on the right side of the mounting tube. A screw rod is rotatably installed between the M-shaped plate and the mounting tube. The guide sleeve is composed of a middle ring and three extension sleeves extending from the outside of the ring. The lower extension sleeve is threadedly connected to the outside of the screw rod.

3. A plastic pipe inner diameter detection device according to claim 2, characterized in that: Two guide rods 1 that are symmetrical front and back and slidingly connected to the two extension sleeves above are installed between the installation cylinder and the M-shaped plate. The guide rods 1 are located above the screw rod, and a triangular support structure is formed between the two guide rods 1 and the screw rod.

4. A plastic pipe inner diameter detection device according to claim 2, characterized in that: A control motor is fixedly installed on the right side of the M-shaped plate, and an output shaft of the control motor rotates through the M-shaped plate and is fixedly connected to the screw rod.

5. The device for detecting inner diameter of a plastic pipe according to claim 1, characterized in that: The clamping assembly includes a control ring rotatably mounted on the end face of the mounting cylinder and concentric with the mounting cylinder, a plurality of arc grooves distributed circumferentially are provided on the control ring, a control sleeve is rotatably mounted between the left and right inner walls of the arc groove, a plurality of circumferentially distributed fixing plates are fixedly mounted on the outside of the mounting cylinder, a control rod slidably connected to the control sleeve is rotatably mounted on the side of the fixing plate close to the control ring, a guide cylinder slidably matched with the guide rod 2 is fixedly mounted on the outside of the control rod, and the guide rod 2 passes through the guide cylinder and the guide groove from right to left in sequence.

6. A plastic pipe inner diameter detection device according to claim 5, characterized in that: A clamping roller is rotatably mounted between two control rods on the left and right sides that are opposite to each other, and a reinforcing rod is fixedly mounted between the two control rods on the left and right sides that are opposite to each other.

7. A plastic pipe inner diameter detection device according to claim 1, characterized in that: The support assembly includes a plurality of support frames fixedly mounted on the inner wall of the bottom of the mounting cylinder, support rollers are rotatably mounted between the front and rear inner walls of the support frames, and the plurality of support frames are evenly spaced from left to right.

8. The device for detecting inner diameter of a plastic pipe according to claim 1, characterized in that: The inner support concentric mechanism includes an inner support assembly and a driving assembly for driving the inner support assembly to expand the inner wall of the supporting pipe. The inner support assemblies are evenly arranged in three along the circumference of the collar, including two mounting plates fixedly mounted on one side of the collar close to the mounting tube and symmetrical to each other, and two driving rods sliding through the mounting plates. The two driving rods are symmetrically distributed on both sides of the two mounting plates. A scissor arm group is hinged between the two mounting plates and the two driving rods, and an inner support plate is fixedly mounted on the side of the scissor arm group away from the driving rod.

9. The device for detecting inner diameter of a plastic pipe according to claim 8, characterized in that: There are three drive assemblies evenly arranged along the circumference of the collar, and the drive assembly includes a collar plate fixedly mounted on the outside of the collar, a reset spring fixedly mounted on the side of the collar plate close to the scissor arm group, a reset plate fixedly mounted on the end of the reset spring away from the collar plate, a slide rod sliding through the collar plate fixedly mounted on the side of the reset plate close to the collar plate, and a drive plate fixedly mounted on the end of the slide rod away from the reset plate and fixedly connected to the two drive rods.

10. The device for detecting inner diameter of a plastic pipe according to claim 9, characterized in that: A limit rod sliding through the drive plate is fixedly installed on one side of the sleeve plate close to the drive plate, and a limit plate is provided on the end of the limit rod away from the sleeve plate. A reset frame matching the reset plate is fixedly installed on the outer side of the installation cylinder.

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