Dimension detection device for cable protection pipe
By designing movable outer and inner diameter detection mechanisms, combined with photoelectric sensors and drive mechanisms, rapid, installation-free, and disassembly-free detection of cable protection pipes is achieved, solving the problem of low detection efficiency in existing technologies and improving detection efficiency.
Patent Information
- Application Number
- CN202511707143.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-03-17
AI Technical Summary
Existing cable protection pipe size detection devices require fixing and then disassembling, which increases the labor intensity of workers and affects detection efficiency.
A cable protection pipe size detection device was designed, which includes a movable outer diameter detection mechanism and an inner diameter detection mechanism. The device detects the outer and inner diameters of the pipe in real time through photoelectric sensors, eliminating the need for installation and disassembly of the pipe. It also achieves automatic position adjustment using a servo motor and drive mechanism.
It reduces the workload of testing personnel, improves testing efficiency, and enables rapid, manual testing of outer and inner diameters.
Smart Images

Figure CN121677583A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cable protection pipe testing technology, specifically to a size testing device for cable protection pipes. Background Technology
[0002] Cable protection conduits are protective devices used in power, telecommunications, and other engineering projects. Their main function is to enclose and protect cables from external influences such as mechanical damage, chemical corrosion, and electromagnetic interference. Common materials include metals, plastics, and composite materials, with different types selected based on the laying environment. Their characteristics include pressure resistance, corrosion resistance, insulation, and ease of installation. They are widely used in urban power grids, transportation infrastructure, industrial plants, and other fields, significantly extending cable life and improving safety.
[0003] During the production of cable protection pipes, the outer and inner diameters need to be inspected to ensure smooth cable laying, effective mechanical protection, and compliance with engineering design specifications. Precise dimensional control can prevent problems such as installation conflicts, poor heat dissipation, or long-term deformation, while also optimizing the production process and avoiding material waste and safety risks.
[0004] Existing dimensional inspection equipment requires fixing the pipe fittings during the inspection process and disassembling them after the inspection is completed. This step increases the labor intensity of workers and seriously affects the overall efficiency of the inspection work.
[0005] Therefore, this application proposes a size detection device for cable protection pipes to solve the above-mentioned problems. Summary of the Invention
[0006] The purpose of this invention is to provide a size detection device for cable protection pipes to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a size detection device for cable protection pipes, comprising: Inspection workbench; A movable outer diameter measuring mechanism is installed on the top of the measuring workbench and is used to measure the outer diameter of pipe fittings. A pipe fitting drive mechanism is provided on the inspection workbench and is used to drive the pipe fitting for outer diameter inspection to move. An inner diameter measuring mechanism is installed on the top of the measuring workbench and is used to measure the inner diameter of pipe fittings. The movable outer diameter detection mechanism includes a protruding seat, a positioning seat, and a first display screen. The protruding seat is fixedly installed on the top of the detection workbench. A support roller is rotatably connected to the inner wall of the protruding seat. The positioning seat is fixedly installed on the top of the detection workbench. A column is fixedly installed on the top of the positioning seat. A top plate is fixedly installed on the top of the column. A sliding seat is slidably connected to the outer wall of the column. A crossbar is fixedly installed on the outer wall of the sliding seat. There are two crossbars. A connecting plate is fixedly installed between the adjacent sides of the two crossbars. A support platform is fixedly installed on the top of the top plate. A first photoelectric sensor is fixedly installed on the bottom of the support platform.
[0008] The bottom of the crossbar is fixedly equipped with a protrusion, and a rotating roller is rotatably connected to the inner wall of the protrusion. A protrusion plate is fixedly installed on the side of the sliding seat away from the crossbar.
[0009] The top of the top plate is fixedly installed with a cylinder, and an inner rod is detachably connected to the inner wall of the cylinder. A connecting seat is fixedly installed on the top of the inner rod. The first display screen is fixedly installed on the inner wall of the connecting seat. A bolt is threadedly connected to the outer wall of the cylinder, and the threaded end of the bolt is movably abutting against the outer wall of the inner rod.
[0010] The movable outer diameter detection mechanism further includes a frame, which is fixedly installed on the top of the detection workbench. A track rod is fixedly installed on the inner wall of the frame, and a lead screw is rotatably connected to the inner wall of the frame. A servo motor is fixedly installed on the top of the frame, and the output shaft of the servo motor is fixedly connected to the top of the lead screw. A sliding seat is slidably connected to the outer wall of the track rod, and the sliding seat is threaded to the lead screw. A support plate is fixedly installed on the outer wall of the sliding seat, and the top of the support plate movably abuts against the bottom of the protrusion plate.
[0011] The pipe fitting drive mechanism includes a support arm, which is fixedly installed on the outer wall of the inspection workbench. A support base is fixedly installed on the top of the support arm. A drive roller is rotatably connected to the front of the support base, and a driven gear is rotatably connected to the back of the support base. The end of the drive roller is fixedly connected to the front of the driven gear.
[0012] The pipe fitting driving mechanism also includes a drive motor, which is fixedly mounted on the top of the inspection workbench. The output shaft of the drive motor is fixedly connected to a drive gear, which is rotatably connected to the back of the support base. The side of the drive gear meshes with the side of the driven gear.
[0013] The inner diameter detection mechanism includes a detection strip plate, which is fixedly installed on the top of the detection workbench. A sliding groove is formed on the detection strip plate, and a slider is slidably connected to the inner wall of the sliding groove.
[0014] The top of the detection strip is fixedly mounted with a fixed column, and the top of the slider is fixedly mounted with a movable column.
[0015] The detection strip has a side support block fixedly installed at its end, a second photoelectric sensor fixedly installed on the inner wall of the side support block, and a rubber pad located in the inner cavity of the slide groove fixedly connected to the side of the side support block.
[0016] The inner diameter detection mechanism further includes a support rod, which is fixedly installed on the top of the detection workbench. A damping rotating sleeve is rotatably connected to the outer wall of the support rod, and a symmetrical support block is fixedly installed on the outer wall of the damping rotating sleeve. A second display screen is fixedly installed at the end of the symmetrical support block.
[0017] Compared with the prior art, the beneficial effects of the present invention are: By designing a movable outer diameter detection mechanism, when detecting the outer diameter of a pipe fitting, the fitting is placed directly on top of the support roller, and then the sliding seat is slid along the outer wall of the column, allowing it to rest on top of the fitting. The first photoelectric sensor converts the position signal of the connecting plate into a digital signal and transmits it to the first display screen for display, achieving rapid detection of the fitting's outer diameter. Similarly, by designing an inner diameter detection mechanism, when detecting the inner diameter of a pipe fitting, the fitting is placed directly on the outer walls of the moving and fixed columns, and then the slider is slid, moving the moving column until it aligns with the fixed column along the inner diameter of the fitting. At this point, the second photoelectric sensor converts the slider's position signal into a digital signal and transmits it to the second display screen for display, achieving rapid detection of the fitting's inner diameter. This design eliminates the need for installation and disassembly of the fitting during inner and outer diameter sampling inspections, reducing the workload of inspection personnel and improving the overall efficiency of the inspection work. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the column of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the sliding seat of the present invention; Figure 4 This is a schematic diagram of the structure of the first display screen of the present invention; Figure 5 This is a schematic diagram of the framework of the present invention; Figure 6 This is a schematic diagram of the pipe fitting drive mechanism of the present invention; Figure 7 This is a schematic diagram of the rear structure of the pipe fitting drive mechanism of the present invention; Figure 8 This is a schematic diagram of the inner diameter detection mechanism of the present invention; Figure 9 This is a schematic diagram of the structure of the detection strip of the present invention; Figure 10 This is a schematic diagram of the supporting bending rod of the present invention.
[0019] In the diagram: 1. Inspection workbench; 2. Movable outer diameter inspection mechanism; 21. Protruding seat; 22. Support roller; 23. Positioning seat; 24. Column; 25. Top plate; 26. Sliding seat; 261. Crossbar; 262. Connecting plate; 263. Protruding block; 264. Rotating roller; 265. Protruding plate; 27. Support platform; 271. First photoelectric sensor; 28. Cylinder; 281. Inner rod; 282. Bolt; 283. Connecting seat; 284. First display screen; 29. Frame; 291. Track rod; 292. Lead screw; 2 93. Servo motor; 294. Sliding seat; 295. Support plate; 3. Pipe fitting drive mechanism; 31. Support arm; 32. Support seat; 33. Drive roller; 34. Drive motor; 35. Drive gear; 36. Driven gear; 4. Inner diameter detection mechanism; 41. Detection strip; 42. Slide groove; 43. Slider; 44. Moving column; 45. Fixed column; 46. Side support block; 47. Second photoelectric sensor; 48. Rubber pad; 49. Second display screen; 491. Supporting bent rod; 492. Damping rotating sleeve; 493. Symmetrical support block. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Please see Figure 1-10 The present invention provides a technical solution: a size detection device for cable protection pipes, comprising: Inspection workbench 1; The movable outer diameter measuring mechanism 2 is set on the top of the measuring workbench 1 and is used to measure the outer diameter of the pipe fitting. Pipe driving mechanism 3 is set on the inspection workbench 1 and is used to drive the pipe fitting for outer diameter inspection to move. The inner diameter detection mechanism 4 is set on the top of the detection workbench 1 and is used to detect the inner diameter of the pipe fitting. The movable outer diameter detection mechanism 2 includes a protruding seat 21, a positioning seat 23, and a first display screen 284. The protruding seat 21 is fixedly installed on the top of the detection workbench 1. A support roller 22 is rotatably connected to the inner wall of the protruding seat 21. The positioning seat 23 is fixedly installed on the top of the detection workbench 1. A column 24 is fixedly installed on the top of the positioning seat 23. A top plate 25 is fixedly installed on the top of the column 24. A sliding seat 26 is slidably connected to the outer wall of the column 24. A crossbar 261 is fixedly installed on the outer wall of the sliding seat 26. There are two crossbars 261. A connecting plate 262 is fixedly installed between adjacent sides of the two crossbars 261. A support platform 27 is fixedly installed on the top of the top plate 25. A first photoelectric sensor is fixedly installed on the bottom of the support platform 27. When the device 271 detects the outer diameter of the pipe fitting, it places the pipe fitting directly on top of the support roller 22, and then lowers the sliding seat 26 so that the sliding seat 26 rests on top of the pipe fitting. At this time, the first photoelectric sensor 271 works, converting the position signal of the connecting plate 262 into a digital signal and transmitting it to the first display screen 284 for real-time display. This enables the device to quickly detect the outer diameter of the pipe fitting without the need to install or disassemble the pipe fitting, reducing the labor intensity of the inspection personnel and improving the overall efficiency of the inspection work. At the same time, the device can move the pipe fitting in the left and right directions to realize the function of repositioning the outer diameter of the pipe fitting, further facilitating the outer diameter detection work and improving the efficiency of the outer diameter detection.
[0022] It should be noted that during use, when detecting the outer diameter of the pipe fitting, the pipe fitting is placed directly on top of the support roller 22. The servo motor 293 is controlled to rotate the lead screw 292, causing the sliding seat 294 to slide downwards on the outer wall of the track rod 291. Then, the sliding seat 26 is lowered so that it rests on top of the pipe fitting. At this time, the first photoelectric sensor 271 works, converting the position signal of the connecting plate 262 into a digital signal and transmitting it to the first display screen 284 for real-time display, realizing the function of quickly detecting the outer diameter of the pipe fitting. During the repositioning detection of the outer diameter of the pipe fitting, the pipe fitting is moved in the left and right directions, and the drive motor can be controlled at this time. When the 34 is working, it drives the drive gear 35 to rotate. Since the drive gear 35 meshes with the driven gear 36, the driven gear 36 can drive the drive roller 33 to rotate. The power of the drive roller 33 can drive the pipe to move in the left and right directions, realizing the function of automatic position adjustment. When detecting the inner diameter of the pipe, the pipe is directly placed on the outer wall of the moving column 44 and the fixed column 45. Then, the slider 43 is manually slid to drive the moving column 44 to move, so that the moving column 44 and the fixed column 45 are on a straight line of the inner diameter of the pipe. At this time, the second photoelectric sensor 47 will convert the position signal of the slider 43 into a digital signal and transmit it to the second display screen 49 for display, realizing the function of quickly detecting the inner diameter of the pipe.
[0023] In one embodiment, a protrusion 263 is fixedly installed at the bottom of the crossbar 261, a roller 264 is rotatably connected to the inner wall of the protrusion 263, and a protrusion plate 265 is fixedly installed on the side of the sliding seat 26 away from the crossbar 261.
[0024] This design is for reference. Figure 3 The design of the roller 264 enables the sliding seat 26 to slide and connect with the outer wall of the pipe, improving the smoothness of the left and right position adjustment of the pipe. The design of the protruding plate 265 makes it easy to raise the sliding seat 26 as a whole in the initial state.
[0025] In one embodiment, a cylinder 28 is fixedly installed on the top of the top plate 25, an inner rod 281 is detachably connected to the inner wall of the cylinder 28, a connecting seat 283 is fixedly installed on the top of the inner rod 281, a first display screen 284 is fixedly installed on the inner wall of the connecting seat 283, and a bolt 282 is threadedly connected to the outer wall of the cylinder 28, with the threaded end of the bolt 282 movably abutting against the outer wall of the inner rod 281.
[0026] This design is for reference. Figure 4 Through the connection design between the cylinder 28 and the inner rod 281, the orientation of the first display screen 284 can be adjusted for easy observation by the user. During adjustment, the bolt 282 is loosened, and the inner rod 281 can be rotated inside the cylinder 28. After adjustment, the bolt 282 is tightened.
[0027] In one embodiment, the movable outer diameter detection mechanism 2 further includes a frame 29, which is fixedly installed on the top of the detection workbench 1. A track rod 291 is fixedly installed on the inner wall of the frame 29, and a lead screw 292 is rotatably connected to the inner wall of the frame 29. A servo motor 293 is fixedly installed on the top of the frame 29, and the output shaft of the servo motor 293 is fixedly connected to the top of the lead screw 292. A sliding seat 294 is slidably connected to the outer wall of the track rod 291, and the sliding seat 294 is threadedly connected to the lead screw 292. A support plate 295 is fixedly installed on the outer wall of the sliding seat 294, and the top of the support plate 295 movably abuts against the bottom of the protrusion plate 265.
[0028] This design is for reference. Figure 5 In the initial state, the support plate 295 is located at the top. The support plate 295 raises the sliding seat 26 to the top with the help of the protruding plate 265. After the pipe is placed on the top of the support roller 22, the servo motor 293 is controlled to work, driving the lead screw 292 to rotate, causing the sliding seat 294 to slide downward on the outer wall of the track rod 291, thus realizing the function of lowering the sliding seat 26 as a whole, so that the sliding seat 26 can be placed on the top of the pipe for outer diameter detection.
[0029] In one embodiment, the pipe fitting drive mechanism 3 includes a support arm 31, which is fixedly installed on the outer wall of the inspection workbench 1. A support base 32 is fixedly installed on the top of the support arm 31. A drive roller 33 is rotatably connected to the front of the support base 32, and a driven gear 36 is rotatably connected to the back of the support base 32. The end of the drive roller 33 is fixedly connected to the front of the driven gear 36. The pipe fitting drive mechanism 3 also includes a drive motor 34, which is fixedly installed on the top of the inspection workbench 1. A drive gear 35 is fixedly connected to the output shaft of the drive motor 34. The drive gear 35 is rotatably connected to the back of the support base 32, and the side of the drive gear 35 meshes with the side of the driven gear 36.
[0030] This design is for reference. Figure 7 During the process of changing the outer diameter of the pipe fitting, the pipe fitting is moved in the left and right direction. At this time, the drive motor 34 can be controlled to work, driving the drive gear 35 to rotate. Since the drive gear 35 meshes with the driven gear 36, the drive roller 33 can be driven to rotate through the driven gear 36. The power of the rotation of the drive roller 33 can drive the pipe fitting to move in the left and right direction, realizing the function of automatic position adjustment and reducing the labor intensity of the workers.
[0031] In one embodiment, the inner diameter detection mechanism 4 includes a detection strip 41, which is fixedly installed on the top of the detection workbench 1. A groove 42 is provided on the detection strip 41, and a slider 43 is slidably connected to the inner wall of the groove 42. A fixed column 45 is fixedly installed on the top of the detection strip 41, and a movable column 44 is fixedly installed on the top of the slider 43. A side support block 46 is fixedly installed at the end of the detection strip 41, and a second photoelectric sensor 47 is fixedly installed on the inner wall of the side support block 46. A rubber pad 48 located in the inner cavity of the groove 42 is fixedly connected to the side of the side support block 46.
[0032] This design is for reference. Figure 9 When detecting the inner diameter of the pipe fitting, the pipe fitting is directly placed on the outer wall of the moving column 44 and the fixed column 45. Then, the slider 43 is manually slid to move the moving column 44, so that the moving column 44 and the fixed column 45 are on a straight line of the inner diameter of the pipe fitting. At this time, the second photoelectric sensor 47 will convert the position signal of the slider 43 into a digital signal and transmit it to the second display screen 49 for display, realizing the function of quickly detecting the inner diameter of the pipe fitting. Through the design of the rubber pad 48, the sliding position of the slider 43 can be limited, avoiding the problem of the slider 43 impacting the end of the second photoelectric sensor 47 when the pipe is not placed outside the moving column 44 and the fixed column 45.
[0033] In one embodiment, the inner diameter detection mechanism 4 further includes a support rod 491, which is fixedly installed on the top of the detection workbench 1. A damping rotating sleeve 492 is rotatably connected to the outer wall of the support rod 491. A symmetrical support block 493 is fixedly installed on the outer wall of the damping rotating sleeve 492. A second display screen 49 is fixedly installed at the end of the symmetrical support block 493.
[0034] This design is for reference. Figure 10 Through the connection design of the support rod 491 and the damping rotating sleeve 492, the user can adjust the elevation angle of the second display screen 49 for easy observation. The second photoelectric sensor 47 is electrically connected to the second display screen 49, and the first display screen 284 is electrically connected to the first photoelectric sensor 271. It is worth noting that the second photoelectric sensor 47, the second display screen 49, the first display screen 284, and the first photoelectric sensor 271 in this solution are commercially available devices that can be purchased by those skilled in the art. The devices have not been structurally modified in this paper. Therefore, those skilled in the art are familiar with their working principles based on their professional knowledge and can apply them proficiently. Thus, this paper will not elaborate on them further. At the same time, this solution aims to protect the physical structure, but does not protect the circuit and software control. The proposal of the processing circuit in this paper is only to supplement the feasibility and authenticity of the invention. This invention does not seek protection for the algorithm and circuit technology. It is worth emphasizing that although the electronic control program is not described in detail in this solution, those skilled in the art can be familiar with and apply it based on their professional knowledge.
[0035] Furthermore, if the embodiments involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relation to the specification. The significance or implied number of the indicated technical features is not specified. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.
Claims
1. A cable protection pipe size detection device, characterized by, Include: Detect the workbench (1); Movable outer diameter detection mechanism (2), the movable outer diameter detection mechanism (2) is arranged on the top of the detection workbench (1), the movable outer diameter detection mechanism (2) is used for detecting the outer diameter of pipe fittings; Pipe fittings driving mechanism (3), the pipe fittings driving mechanism (3) is arranged on the detection workbench (1), the pipe fittings driving mechanism (3) is used to drive the pipe fittings of outer diameter detection to move; Inner diameter detection mechanism (4), the inner diameter detection mechanism (4) is arranged on the top of the detection workbench (1), and the inner diameter detection mechanism (4) is used for detecting the inner diameter of pipe fittings; The movable outer diameter detection mechanism (2) includes a convex seat (21), a positioning seat (23) and a first display screen (284), the convex seat (21) is fixedly installed on the top of the detection workbench (1), the inner wall of the convex seat (21) is rotatably connected with the supporting roller (22), the positioning seat (23) is fixedly installed on the top of the detection workbench (1), the top of the positioning seat (23) is fixedly installed with the stand column (24), the top of the stand column (24) is fixedly installed with the top plate (25), the outer wall of the stand column (24) is slidably connected with the sliding seat (26), the outer wall of the sliding seat (26) is fixedly installed with the cross bar (261), the number of the cross bar (261) is two, the connecting plate (262) is fixedly installed between the adjacent side of the two cross bars (261), the top of the top plate (25) is fixedly installed with the support table (27), and the bottom of the support table (27) is fixedly installed with the first photoelectric sensor (271).
2. The cable protection tube size detection device according to claim 1, characterized in that: The bottom of the cross bar (261) is fixedly installed with the convex block (263), the inner wall of the convex block (263) is rotatably connected with the rotating roller (264), and the side, away from the cross bar (261), of the sliding seat (26) is fixedly installed with the convex plate (265).
3. A cable protection tube dimension detection device according to claim 2, characterized in that: The top of the top plate (25) is fixedly installed with a cylinder (28), the inner wall of the cylinder (28) is detachably connected with an inner rod (281), the top of the inner rod (281) is fixedly installed with a connecting seat (283), the first display screen (284) is fixedly installed on the inner wall of the connecting seat (283), and the outer wall of the cylinder (28) is threadedly connected with a bolt piece (282), and the threaded end of the bolt piece (282) is movably abutted with the outer wall of the inner rod (281).
4. A cable protection tube dimension detection apparatus according to claim 3, characterized in that: The movable outer diameter detection mechanism (2) further comprises a frame (29) fixedly installed on the top of the detection workbench (1), a rail rod (291) fixedly installed on the inner wall of the frame (29), a lead screw (292) rotatably connected to the inner wall of the frame (29), a servo motor (293) fixedly installed on the top of the frame (29), the output shaft of the servo motor (293) fixedly connected to the top of the lead screw (292), a sliding seat (294) slidably connected to the outer wall of the rail rod (291), the sliding seat (294) threaded on the lead screw (292), a supporting plate (295) fixedly installed on the outer wall of the sliding seat (294), and the top of the supporting plate (295) movably abuts against the bottom of the convex plate (265).
5. The cable protection tube size detection apparatus of claim 1, wherein: The pipe driving mechanism (3) comprises a supporting arm (31) fixedly installed on the outer wall of the detection workbench (1), a supporting seat (32) fixedly installed on the top of the supporting arm (31), a driving roller (33) rotatably connected to the front face of the supporting seat (32), and a driven gear (36) rotatably connected to the back face of the supporting seat (32).
6. A cable protection tube dimension detection apparatus according to claim 5, wherein: The pipe driving mechanism (3) further comprises a driving motor (34) fixedly installed on the top of the detection workbench (1), an input gear (35) fixedly connected to the output shaft of the driving motor (34), and the input gear (35) rotatably connected to the back face of the supporting seat (32).
7. The cable protection tube size detection apparatus of claim 1, wherein: The inner diameter detection mechanism (4) comprises a detection strip plate (41) fixedly installed on the top of the detection workbench (1), and a sliding groove (42) formed in the detection strip plate (41).
8. A cable protection tube dimension detection apparatus according to claim 7, characterized in that: The top of the detection strip plate (41) is fixedly installed with a fixing column (45), and the top of the sliding block (43) is fixedly installed with a moving column (44).
9. A cable protection pipe dimension detection device according to claim 8, characterised in that: The end of the detection strip plate (41) is fixedly installed with a side supporting block (46), the inner wall of the side supporting block (46) is fixedly installed with a second photoelectric sensor (47), and the side face of the side supporting block (46) is fixedly connected with a rubber pad (48) in the inner cavity of the sliding groove (42).
10. A cable protection tube dimension detection apparatus according to claim 9, wherein: The inner diameter detection mechanism (4) further comprises a supporting bent rod (491) fixedly installed on the top of the detection workbench (1), a damping rotating sleeve (492) rotatably connected to the outer wall of the supporting bent rod (491), symmetric supporting blocks (493) fixedly installed on the outer wall of the damping rotating sleeve (492), and a second display screen (49) fixedly installed on the end of the symmetric supporting blocks (493).
Citation Information
Cited By
A size detection device and method for CPVC cable protection pipe
CN122217164A