A device for detecting the inner diameter of plastic pipe fittings

Abstract

This invention relates to the field of inner diameter testing technology, specifically disclosing a device for testing the inner diameter of plastic pipe fittings. The device includes a base and a mounting platform fixedly installed on the top of the base. A mounting cylinder is fixedly installed on the top of the mounting platform. A triangular guide mechanism is located on the right side of the mounting cylinder at the top of the base. A multi-point external clamping mechanism is provided on the mounting cylinder. A follow-up guide mechanism and an internal support concentric mechanism are provided between the triangular guide mechanism and the multi-point external clamping mechanism. The multi-point external clamping mechanism includes two symmetrical clamping components and a support component located on the inner wall of the bottom of the mounting cylinder for placing the pipe fitting. In this application, under the guidance of the guide groove and the guide cylinder, the guide rod can accurately guide the guide sleeve and the testing probe. This guiding action ensures that the testing probe remains coaxial with the inner wall of the pipe fitting during the measurement process, thereby significantly improving the accuracy and reliability of subsequent measurements.

Description

Technical Field

[0001] This invention relates to the field of inner diameter testing technology, and more specifically, to a device for testing the inner diameter of plastic pipe fittings. Background Technology

[0002] Plastic pipe fittings are accessories used to connect or change the direction, branch, or terminate plastic pipes. They are widely used in construction, chemical industry, agricultural irrigation and other fields. In some systems with strict requirements for fluid transmission performance, such as medical equipment, food processing and chemical production, the consistency and accuracy of the inner diameter of the pipe fittings are crucial to ensuring the normal operation of the system. Therefore, it is necessary to perform precise testing on the inner diameter of the pipe fittings.

[0003] Currently, devices for measuring the inner diameter of plastic pipe fittings generally include: vernier calipers, inside micrometers, gauges, inside diameter measuring instruments, and optical imaging measurement systems. Among them, inside diameter measuring instruments integrate multiple high-precision laser displacement sensors on a probe (stationary or rotatable) to simultaneously measure data from multiple points, thereby quickly obtaining the contour of the inner surface of the pipe fitting. However, current inside diameter measuring instruments still have certain shortcomings:

[0004] Firstly, current internal diameter measuring instruments use a lead screw or cylinder to drive the probe into the pipe for measurement. However, during this process, the probe height needs to be adjusted to match the different pipe diameters. After adjustment, the coaxiality between the probe and the pipe is difficult to keep perfectly consistent, which may affect the measurement accuracy. Furthermore, due to the lack of a guidance system, the probe's movement path is easily affected by external factors, leading to increased measurement errors.

[0005] Secondly, current internal diameter measuring instruments typically use chuck clamps to secure the pipe to the measuring platform from the outside. 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 causes 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 stability of the pipe.

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

[0007] This invention provides a device for detecting the inner diameter of plastic pipe fittings, which solves the technical problems in the prior art where the coaxiality of the detection probe and the pipe fitting is difficult to keep completely consistent and the clamping force is not evenly distributed on the entire pipe fitting.

[0008] This invention provides a plastic pipe fitting inner diameter detection device, including a base and a mounting platform fixedly installed on the top of the base. A mounting cylinder is fixedly installed on the top of the mounting platform. A triangular guide mechanism is provided on the right side of the mounting cylinder at the top of the base. A multi-point external clamping mechanism is provided on the mounting cylinder. A follow-up guide mechanism and an internal support concentric mechanism are provided between the triangular guide mechanism and the multi-point external clamping mechanism. The multi-point external clamping mechanism includes two clamping components symmetrically arranged on the left and right and a support component provided on the inner wall of the bottom of the mounting cylinder for placing the pipe fitting. The follow-up guide mechanism includes a plurality of circumferentially distributed interlacing guide components and a plurality of follow-up adjustment components. The follow-up adjustment components adaptively adjust the position of the interlacing guide components as the clamping components on the right move.

[0009] The triangular guide mechanism includes a guide sleeve located on the right side of the mounting cylinder and concentric with the mounting cylinder. A detection probe is fixedly installed inside the guide sleeve. The follow-up adjustment component includes an adjustment plate fixedly installed on the outside of the guide sleeve. An adjustment groove is opened on the side of the adjustment plate away from the axis of the mounting cylinder. The through guide component includes a second guide rod slidably connected in the adjustment groove and a guide plate fixedly installed on the inner wall of the mounting cylinder. A guide groove is opened on the guide plate that slidably engages with the second guide rod.

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

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

[0012] Furthermore, two guide rods are symmetrically mounted between the mounting cylinder and the M-shaped plate and are slidably connected to the two upper extension sleeves. The guide rods are located above the lead screw, and the two guide rods and the lead screw form a triangular support structure.

[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 lead screw.

[0014] Furthermore, the clamping assembly includes a control ring rotatably mounted on the end face of the mounting cylinder and concentric with the mounting cylinder. The control ring has several circumferentially distributed arc-shaped grooves. A control sleeve is rotatably mounted between the left and right inner walls of the arc-shaped grooves. Several circumferentially distributed fixing plates are fixedly mounted on the outer side of the mounting cylinder. A control rod that is slidably connected in the control sleeve is rotatably mounted on the side of the fixing plate near the control ring. A guide cylinder that slides with the guide rod two is fixedly mounted on the outer side of the control rod. The guide rod two passes through the guide cylinder and the guide groove from right to left.

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

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

[0017] Furthermore, the concentric internal support mechanism includes an internal support assembly and a drive assembly for driving the internal support assembly to expand and support the inner wall of the pipe. Three internal support assemblies are evenly arranged along the circumference of the collar, including two mounting plates fixedly installed on the side of the collar near the mounting cylinder and symmetrical to each other, and two drive rods sliding through the mounting plates. The two drive rods are symmetrically distributed on both sides of the two mounting plates. A scissor arm assembly is hinged between the two mounting plates and the two drive rods. An internal support plate is fixedly installed on the side of the scissor arm assembly away from the drive rods.

[0018] Furthermore, three drive assemblies are evenly arranged along the circumference of the collar. Each drive assembly includes a sleeve plate fixedly installed on the outside of the collar. A return spring is fixedly installed on the side of the sleeve plate near the scissor arm assembly. A return plate is fixedly installed on the end of the return spring away from the sleeve plate. A sliding rod that slides through the sleeve plate is fixedly installed on the side of the return plate near the sleeve plate. A drive plate that is fixedly connected to two drive rods is fixedly installed on the end of the sliding rod away from the return plate.

[0019] Furthermore, a limiting rod that slides through the driving plate is fixedly installed on the side of the sleeve plate near the driving plate, and a limiting plate is provided at the end of the limiting rod away from the sleeve plate. A reset frame that cooperates with the reset plate is fixedly installed on the outer side of the mounting cylinder.

[0020] The beneficial effects of this invention are as follows: 1. In this application, under the guidance of the guide groove and the guide cylinder, the second guide rod 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 second guide rod and the guide groove can also lock and strengthen the guide cylinder, further enhancing the stability of the clamping rollers in holding the pipe. Furthermore, the guide groove, the second guide rod, and the guide cylinder form a tight guiding system, ensuring the stability and consistency of the entire measurement process.

[0021] 2. In this application, the guide groove, the second guide rod, and the guide cylinder are aligned, ensuring that the central axis of the mounting cylinder, the pipe fitting, and the detection probe remains consistent. This ensures that the detection probe maintains strict coaxiality with the pipe fitting during the measurement process, eliminates measurement errors caused by external forces, and guarantees high accuracy of the measurement results.

[0022] 3. In this application, the guide sleeve is used to move and drive the probe to extend into the pipe fitting. Simultaneously, the inner support plate is driven to move closer to 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 probe always remain coaxial, thereby further fixing the pipe fitting and further improving the coaxiality between the mounting cylinder, the pipe fitting and the probe.

[0023] 4. In this application, when clamping the pipe fitting, the two clamping rollers below the multi-point external clamping mechanism first lift the pipe fitting placed on top of the support roller and bring it close to the upper clamping roller, so that the three clamping rollers clamp the pipe fitting, making the pipe fitting be clamped in a state consistent with the central axis of the mounting cylinder. At the same time, the contact area between the three clamping rollers and the entire pipe fitting is large, and the clamping force is evenly distributed on the entire pipe fitting, thereby greatly improving the stability of external clamping. Furthermore, by controlling the rotation angle of the control ring, clamping detection of pipe fittings of different diameters can be achieved, and the central axis between the pipe fitting, the mounting cylinder, and the detection probe can always be kept consistent. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

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

[0026] Figure 3 This is the present invention. Figure 2 A magnified view of part A in the middle.

[0027] Figure 4 This is a three-dimensional structural diagram of the follow-up guiding mechanism, the inner support concentric mechanism, the clamping roller, the control sleeve, and the control rod of the present invention.

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

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

[0030] Figure 7 This is a three-dimensional structural diagram of the detection probe, inner support plate, adjustment plate, guide sleeve, and adjustment groove of the present invention.

[0031] Figure 8 This is a three-dimensional structural diagram of the slide bar, drive plate, limit bar, reset spring, and guide sleeve of the present invention.

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

[0033] In the diagram: 1. Base; 2. Mounting platform; 3. Triangular guide mechanism; 4. Multi-point external clamping mechanism; 5. Follow-up guide mechanism; 6. Concentric internal support mechanism; 7. Mounting cylinder; 8. Control motor; 9. Pipe fitting; 10. Detection probe; 301. M-shaped plate; 302. Lead screw; 303. Guide rod one; 304. Guide sleeve; 401. Clamping assembly; 402. Support assembly; 403. Reinforcing 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. Insertion guide assembly; 502. Follow-up adjustment assembly; 5011. Guide rod two; 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. Return spring; 6023. Return plate; 6024. Slide rod; 6025. Drive plate; 6026. Limiting rod; 6027. Return frame. Detailed Implementation

[0034] The subject matter described herein will now be discussed with reference to exemplary 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. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0035] See Figure 1 , Figure 2 and Figure 4This embodiment proposes a plastic pipe fitting inner diameter detection device, including a base 1 and a mounting platform 2 fixedly installed on the top of the base 1. A mounting cylinder 7 is fixedly installed on the top of the mounting platform 2. A triangular guide mechanism 3 is provided on the right side of the mounting cylinder 7 at the top of the base 1. A multi-point external clamping mechanism 4 is provided on the mounting cylinder 7. A follow-up guide mechanism 5 and an internal 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 clamping components 401 symmetrically arranged on the left and right and a support component 402 provided on the bottom inner wall of the mounting cylinder 7 for placing the pipe fitting 9. The follow-up guide mechanism 5 includes a plurality of circumferentially distributed interlacing guide components 501 and a plurality of follow-up adjustment components 502. The follow-up adjustment components 502 adaptively adjust the position of the interlacing guide components 501 as the clamping component 401 on the right moves. The internal support concentric mechanism 6 includes an internal support component 601 and a driving component 602 for driving the internal support component 601 to expand and support the inner wall of the pipe fitting 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 cylinder 7 and concentric with the mounting cylinder 7. The control ring 4011 has a plurality of circumferentially distributed arc-shaped grooves 4015. A control sleeve 4012 is rotatably mounted between the left and right inner walls of the arc-shaped grooves 4015. A plurality of circumferentially distributed fixing plates 4013 are fixedly mounted on the outer side of the mounting cylinder 7. A control rod 4014, which is slidably connected to the control sleeve 4012, is rotatably mounted on the side of the fixing plate 4013 near the control ring 4011.

[0037] See Figure 6 A clamping roller 404 is rotatably installed between two opposing control rods 4014 on the left and right sides, and a reinforcing rod 403 is fixedly installed between the two opposing 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 installed on the inner wall of the bottom of the mounting cylinder 7. Support rollers 4022 are rotatably installed between the front and rear inner walls of the support frames 4021. The several support frames 4021 are evenly distributed from left to right.

[0039] In practical use, the pipe fitting 9 to be tested is first placed on top of the support roller 4022. Then, the two control rings 4011 are driven to rotate by an external power source. The rotation of the control rings 4011 causes the control sleeve 4012 to move the control rod 4014 to rotate, which in turn causes the two control rods 4014 on the left and right sides to rotate synchronously and gradually closer to the pipe fitting 9. This causes the control rods 4014 to drive the clamping rollers 404 to move closer to the pipe fitting 9 synchronously, so that the three clamping rollers 404 move closer to the pipe fitting 9 synchronously. During this process, the two lower clamping rollers 404 will first lift the pipe fitting 9 placed on top of the support roller 4022 and move it closer to the upper clamping rollers 404. Finally, the three clamping rollers 404 clamp the pipe fitting 9, so that the pipe fitting 9 is held in a state consistent with the central axis of the mounting cylinder 7. Furthermore, by controlling the rotation angle of the control rings 4011, clamping and testing of pipe fittings 9 of different diameters can be achieved.

[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 cylinder 7 and concentric with the mounting cylinder 7. A detection probe 10 is fixedly installed inside 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 cylinder 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 in the adjustment groove 5022 and a guide plate 5012 fixedly installed on the inner wall of the mounting cylinder 7. The guide plate 5012 has a guide groove 5013 that slidably engages with the guide rod 5011. A guide cylinder 5014 that slidably engages with the guide rod 5011 is fixedly installed on the outer side of the control rod 4014. When the guide sleeve 304 moves to the left, it causes the detection probe 10 to move to the left. During the process, the second guide rod 5011 passes through the guide cylinder 5014 and the guide groove 5013 from right to left. The guide groove 5013 is composed of several alternating arc-shaped openings. The diameter of a single arc-shaped opening matches the diameter of the second guide rod 5011. When the second guide rod 5011 is inserted into a single arc-shaped opening, this arc-shaped opening limits and locks the second guide rod 5011 in the circumferential and radial directions to prevent the second guide rod 5011 from coming out of this arc-shaped opening.

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

[0043] See Figure 1 , Figure 2 and Figure 4 Two guide rods 303, symmetrically arranged front and back and slidably connected to the two upper extension sleeves, are installed between the mounting cylinder 7 and the M-shaped plate 301. The guide rods 303 are located above the lead screw 302, and the two guide rods 303 and the lead screw 302 form a triangular support structure. A control motor 8 is fixedly installed on the right side of the M-shaped plate 301. The output shaft of the control motor 8 rotates through the M-shaped plate 301 and is fixedly connected to the lead screw 302.

[0044] In practical use, when the control lever 4014 on the right side gradually rotates towards the pipe fitting 9, it will drive the guide cylinder 5014 to move synchronously, thereby driving the second guide rod 5011 inside the guide cylinder 5014 to move synchronously (at this time, the second guide rod 5011 is not inserted into the guide groove 5013). This will then drive the end of the second guide rod 5011 located in the adjustment groove 5022 to move synchronously. This will enable the second guide rod 5011 to move simultaneously as the control lever 4014 moves and drives the clamping roller 404 to clamp the pipe fitting 9. This will facilitate the subsequent locking of the control lever 4014 and the clamping roller 404, as well as the horizontal guidance of the detection probe 10, improving the coaxiality of the detection probe 10 and the pipe fitting 9, and ensuring that the detection probe 10 and the central axis of the pipe fitting 9 are aligned.

[0045] After the three clamping rollers 404 clamp the pipe fitting 9, the control motor 8 is started. The output shaft of the control motor 8 rotates, driving the lead screw 302 to rotate, thereby causing the guide sleeve 304 to move towards the side closer to the mounting cylinder 7 under the guidance of the guide rod 303. During this process, the guide rod 5011 moves to the left along the guide groove 5013 and the guide cylinder 5014. Under the guidance of the guide groove 5013 and the guide cylinder 5014, the guide rod 5011 can accurately guide the guide sleeve 304 and the detection probe 10. The guiding effect ensures that the detection probe 10 remains coaxial with the inner wall of the pipe fitting 9 during the measurement process, and keeps the detection probe 10 consistent with the central axis of the pipe fitting 9. This significantly improves the accuracy and reliability of subsequent measurements. Furthermore, the cooperation between guide rod 5011 and guide groove 5013 provides circumferential and radial locking reinforcement to guide cylinder 5014. The locking mechanism ensures that guide sleeve 304 will not shift or wobble during movement, further enhancing the stability of clamping roller 404 in holding pipe 9. Consequently, guide groove 5013, guide rod 5011, and guide cylinder 5014 are collinear, ensuring that the central axes of mounting cylinder 7, pipe 9, and detection probe 10 remain consistent. This guarantees that detection probe 10 maintains strict coaxiality with pipe 9 during measurement, eliminating measurement errors caused by external forces and ensuring high accuracy of the measurement results.

[0046] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 The inner support assembly 601 is evenly arranged in three parts along the circumference of the collar, including two mounting plates 6011 fixedly installed on the side of the collar near the mounting cylinder 7 and symmetrical to each other, and two drive rods 6012 sliding through the mounting plates 6011. The two drive rods 6012 are symmetrically distributed on both sides of the two mounting plates 6011. The two mounting plates 6011 and the two drive rods 6012 are hinged together by a scissor arm assembly 6013. An inner support plate 6014 is fixedly installed on the side of the scissor arm assembly 6013 away from the drive rods 6012.

[0047] See Figure 2 , Figure 3 , Figure 7 and Figure 8The drive assembly 602 has three components evenly arranged along the circumference of the collar. The drive assembly 602 includes a sleeve plate 6021 fixedly installed on the outside of the collar. A return spring 6022 is fixedly installed on the side of the sleeve plate 6021 near the scissor arm assembly 6013. A return plate 6023 is fixedly installed on the end of the return spring 6022 away from the sleeve plate 6021. A sliding rod 6024 that slides through the sleeve plate 6021 is fixedly installed on the side of the return plate 6023 near the sleeve plate 6021. A drive plate 6025 that is fixedly connected to two drive rods 6012 is fixedly installed on the end of the sliding rod 6024 away from the return plate 6023. A limiting rod 6026 that slides through the drive plate 6025 is fixedly installed on the side of the sleeve plate 6021 near the drive plate 6025. A limiting plate is provided on the end of the limiting rod 6026 away from the sleeve plate 6021. A reset frame 6027 that cooperates with the reset plate 6023 is fixedly installed on the outside of the mounting cylinder 7.

[0048] In practical use, as the guide sleeve 304 drives the guide rod 5011 to move to the left along the guide groove 5013 and guide cylinder 5014, when the reset plate 6023 contacts the reset frame 6027, the continued movement of the guide sleeve 304 will cause the reset plate 6023 to squeeze the reset frame 6027, generating a rightward thrust. This will cause the slide rod 6024 to move away from the mounting cylinder 7 and compress the reset spring 6022. The movement of the slide rod 6024 will drive the two drive rods 6012 to move synchronously through the drive plate 6025, thereby driving the scissor arm assembly. 6013 unfolds, thereby driving the inner support plate 6014 to move closer to the inner wall of the pipe fitting 9 until it tightens the inner wall of the pipe fitting 9. At this time, the detection probe 10 is located inside the pipe fitting 9 and 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 fitting 9 and the detection probe 10 always remain coaxial, thereby further fixing the pipe fitting 9 and further improving the coaxiality between the mounting cylinder 7, the pipe fitting 9 and the detection probe 10. Finally, the inner diameter of the pipe fitting 9 is measured by the detection probe 10.

[0049] After the measurement is completed, the control motor 8 is started, driving the lead screw 302 to rotate, which in turn moves the guide sleeve 304 away from the mounting cylinder 7. As the guide sleeve 304 moves, the guide rod 5011 slides to the right along the guide groove 5013 and the guide cylinder 5014. During this process, as the guide sleeve 304 moves, the sleeve plate 6021 gradually moves away from the mounting cylinder 7, the pressure on the return spring 6022 gradually decreases and it begins to reset. During the reset process of the return spring 6022, the guide sleeve 304 drives the mounting plate 6011 to move away from the mounting cylinder 7, causing the scissor arm assembly 6013 to... The folding reset causes the inner support plate 6014 to move away from the inner wall of the pipe 9. When the reset spring 6022 is fully reset, the guide sleeve 304 continues to move, causing the inner support plate 6014 to move out of the pipe 9 until the guide rod 5011 is pulled out of the guide cylinder 5014, thus unlocking the right control rod 4014. Finally, the control ring 4011 rotates, which drives the control rod 4014 to rotate away from the pipe 9 through the control sleeve 4012 and finally detaches from the pipe 9. The pipe 9 falls on top of the support roller 4022 and can then be removed to wait for the next test.

[0050] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for detecting the inner diameter of plastic pipe fittings, characterized in that, include: The base and the mounting cylinder set on the top of the base are provided. A triangular guide mechanism is provided on the top of the base. A multi-point external clamping mechanism is provided on the mounting cylinder. A follow-up guide mechanism and an internal support concentric mechanism are provided between the triangular guide mechanism and the multi-point external clamping mechanism. The multi-point external clamping mechanism includes two clamping components symmetrically arranged on the left and right and a support component for placing the pipe fitting. The follow-up guide mechanism includes several circumferentially distributed interlacing guide components and several follow-up adjustment components. The follow-up adjustment components adaptively adjust the position of the interlacing guide components as the clamping components on one side move. The triangular guide mechanism includes a guide sleeve concentric with the mounting cylinder, a detection probe is fixedly installed inside the guide sleeve, the follow-up adjustment component includes an adjustment plate fixedly installed on the guide sleeve, an adjustment groove is provided on one side of the adjustment plate, and the through guide component includes a guide rod two slidably connected in the adjustment groove and a guide plate fixedly installed on the mounting cylinder, the guide plate is provided with a guide groove that slidably engages with the guide rod two; After the triangular guide mechanism clamps the pipe fitting, the guide sleeve drives the guide rod two through the guide groove. Under the limit of the guide groove, the triangular guide mechanism is locked and fixed, so that the pipe fitting and the detection probe are concentric. The triangular guide mechanism also includes an M-shaped plate fixedly installed on the top of the base and located on the right side of the mounting cylinder. A lead screw is rotatably installed between the M-shaped plate and the mounting cylinder. The guide sleeve is composed of a central collar and three extension sleeves extending outward from the collar. The lower extension sleeve is threaded to the outside of the lead screw. The clamping assembly includes a control ring rotatably mounted on the end face of the mounting cylinder and concentric with the mounting cylinder. The control ring has several circumferentially distributed arc-shaped grooves. A control sleeve is rotatably mounted between the left and right inner walls of the arc-shaped grooves. Several circumferentially distributed fixing plates are fixedly mounted on the outer side of the mounting cylinder. A control rod that is slidably connected in the control sleeve is rotatably mounted on the side of the fixing plate near the control ring. A guide cylinder that slides with the guide rod two is fixedly mounted on the outer side of the control rod. The guide rod two passes through the guide cylinder and the guide groove from right to left. A clamping roller is installed between two opposing control levers on the left and right sides, and a reinforcing rod is fixedly installed between two opposing control levers on the left and right sides. The support assembly includes several support frames fixedly installed on the inner wall of the bottom of the mounting cylinder, and a support roller is rotatably installed between the front and rear inner walls of the support frames. The several support frames are evenly distributed from left to right. The concentric internal support mechanism includes an internal support assembly and a drive assembly for driving the internal support assembly to expand and support the inner wall of the pipe fitting. Three internal support assemblies are evenly arranged along the circumference of the collar, including two mounting plates fixedly installed on the side of the collar near the mounting cylinder and symmetrical to each other, and two drive rods sliding through the mounting plates. The two drive rods are symmetrically distributed on both sides of the two mounting plates. A scissor arm assembly is hinged between the two mounting plates and the two drive rods. An internal support plate is fixedly installed on the side of the scissor arm assembly away from the drive rods.

2. The plastic pipe fitting inner diameter detection device according to claim 1, characterized in that, The mounting cylinder and the M-shaped plate are jointly equipped with two guide rods that are symmetrical front and back and slidably connected to the two upper extension sleeves. The guide rods are located above the lead screw, and the two guide rods and the lead screw form a triangular support structure.

3. The plastic pipe fitting inner diameter detection device according to claim 1, characterized in that, A control motor is fixedly installed on the right side of the M-shaped plate. The output shaft of the control motor rotates through the M-shaped plate and is fixedly connected to the lead screw.

4. The plastic pipe fitting inner diameter detection device according to claim 1, characterized in that, Three drive assemblies are evenly arranged along the circumference of the collar. Each drive assembly includes a sleeve plate fixedly installed on the outside of the collar. A return spring is fixedly installed on the side of the sleeve plate near the scissor arm assembly. A return plate is fixedly installed on the end of the return spring away from the sleeve plate. A sliding rod that slides through the sleeve plate is fixedly installed on the side of the return plate near the sleeve plate. A drive plate that is fixedly connected to two drive rods is fixedly installed on the end of the sliding rod away from the return plate.

5. The plastic pipe fitting inner diameter detection device according to claim 4, characterized in that, A limiting rod that slides through the drive plate is fixedly installed on the side of the sleeve plate near the drive plate. A limiting plate is provided at the end of the limiting rod away from the sleeve plate. A reset frame that cooperates with the reset plate is fixedly installed on the outside of the mounting cylinder.

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