Device for detecting inner diameter of plastic pipe

Abstract

The invention relates to the technical field of plastic pipe detection, and discloses a plastic pipe inner diameter detection device which comprises a machine base and two supporting rollers symmetrically and fixedly installed on the top face of the machine base. A driving motor with the output end fixedly connected with the end of the detection shaft rod is fixedly installed on the side face of the machine base, a positioning assembly is arranged at the end of the top face of the machine base, and the end of the detection shaft rod is fixedly sleeved with an installation sleeve. According to the device for detecting the inner diameter of the plastic pipe, in the detection process, when the inner diameter of the plastic pipe is unqualified, the detection wheel is pressed to drive the detection rod to move, then the warped plate is pressed to enable the marking head at the top end of the marking rod to make contact with the inner wall of the pipe and draw a marking line, the marking head is automatically separated after the detection wheel is recovered, and follow-up detection is not affected; according to the automatic marking mode, a worker can quickly position an unqualified position, reinspection is performed in a targeted manner, and the efficiency and the accuracy of quality detection are improved.

Description

Technical Field

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

[0002] As a key branch of chemical building materials, plastic pipes have become a core material in building water supply and drainage, municipal engineering, gas transmission and other fields due to their lightweight, corrosion resistance and long service life. Their smooth inner walls result in low water flow resistance and significant energy-saving effects; they are also resistant to chemical corrosion and adaptable to a variety of complex environments.

[0003] In the current practice of plastic pipe production and quality inspection, although a series of existing technologies exist for detecting the inner diameter of plastic pipes, these technologies can quickly detect the basic condition of the inner diameter of plastic pipes and obtain a preliminary judgment on whether the inner diameter meets the standard requirements. However, in the testing process, when the test results show that the inner diameter of the plastic pipe is unqualified, the existing technologies cannot accurately pinpoint the specific location of the unqualified inner diameter. This deficiency makes it difficult for staff to intuitively and quickly locate the problem area when faced with the test results, and makes it impossible to directly carry out re-inspection of the unqualified location. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing technology has the disadvantage of being unable to accurately pinpoint the specific location of the defect when the inner diameter is found to be unqualified. This makes it difficult for staff to intuitively locate the problem area, increases the difficulty and workload of re-inspection, reduces the detection efficiency, affects quality control, brings risks to production and use, and greatly reduces the practicality. Therefore, we propose a detection device for the inner diameter of plastic pipes.

[0005] To achieve the above objectives, this application adopts the following technical solution: a device for detecting the inner diameter of plastic pipes, comprising a base and two support rollers symmetrically fixedly installed on the top surface of the base, a detection shaft is rotatably installed on the side of the base, a drive motor with its output end fixedly connected to the end of the detection shaft is fixedly installed on the side of the base, a positioning component is provided at the top end of the base, an installation sleeve is fixedly fitted at the end of the detection shaft, and a detection component is provided on the outer wall of the installation sleeve; The positioning component includes a guide groove formed on the top surface of the base, a drive screw rotatably mounted on the inner wall of the guide groove, a guide block slidably mounted on the inner wall of the guide groove and screwed to the drive screw, a slide plate fixedly mounted on the top surface of the guide block, and two sets of fixing structures symmetrically arranged on the top surface of the slide plate. The detection assembly includes a mounting plate disposed on the outer wall of the mounting sleeve, a detection rod extending through one end of the mounting plate, a mounting frame fixedly mounted on the top end of the detection rod, a detection wheel rotatably mounted on the inner wall of the mounting frame, a spring fitted on the outer wall of the detection rod, and the two ends of the spring being fixedly connected to the detection rod and the mounting plate respectively, and a support structure provided between the mounting plate and the mounting sleeve.

[0006] Preferably, the drive screw is connected to the output end of the drive motor via a driven pulley and a synchronous belt.

[0007] Preferably, the outer wall of the support roller has a plurality of evenly distributed mounting ball grooves, and a support ball is movably mounted on the inner wall of the mounting ball groove.

[0008] Preferably, the fixing structure includes a guide frame fixedly installed on the top surface of the skateboard, two adjusting blocks slidably installed on the inner wall of the guide frame, an adjusting screw rotatably installed on the inner wall of the guide frame, and the adjusting blocks are screwed to the adjusting screw, and a clamping plate is rotatably installed on the side of the adjusting blocks.

[0009] Preferably, the threads on both sides of the outer wall of the adjusting screw are in opposite directions, and the top end of the adjusting screw passes through the top surface of the guide frame and is fixedly mounted with a knob.

[0010] Preferably, the support structure includes a guide sleeve fixedly installed on the outer wall of the mounting sleeve, a lifting screw slidably installed on the inner wall of the guide sleeve through a groove and a slider, the mounting plate being fixedly connected to one end of the lifting screw located outside the guide sleeve, and a threaded sleeve being rotatably installed at the end of the guide sleeve, and the threaded sleeve being screwed to the lifting screw.

[0011] Preferably, a marking rod is provided through the other end of the mounting plate, and a mounting groove is provided at the end of the marking rod. A marking head is slidably installed on the inner wall of the mounting groove, and a spring is fixedly installed between the marking head and the inner wall of the mounting groove.

[0012] Preferably, the lifting screw has an opening at one end located outside the guide sleeve, a rotating shaft is rotatably mounted on the inner wall of the opening, a rocker plate is fixedly fitted on the outer wall of the rotating shaft, a torsion spring is fitted at the end of the rotating shaft, and the two ends of the torsion spring are fixedly connected to the rotating shaft and the opening, respectively.

[0013] Preferably, the rotating shaft is located in the port on the side near the detection rod.

[0014] Preferably, the two ends of the rocker are located below the detection rod and the marking rod, respectively.

[0015] The technical effects and advantages of this invention are as follows: In this invention, the plastic pipe is pushed onto two support rollers, and the pushing resistance is reduced by the support ball, so that the feeding is easily completed. When the end of the pipe contacts the guide frame, the end of the detection shaft can automatically be inside the pipe end and concentric, which eliminates the tedious positioning operation, provides good initial conditions for subsequent detection, greatly shortens the detection preparation time, and improves the overall detection efficiency. In this invention, rotating the knob drives the adjusting screw to rotate. Utilizing the opposite direction of the threads on both sides, the two adjusting blocks drive the clamping plate to slide in opposite directions, lifting the plastic pipe from the inside to achieve fixation. This effectively prevents the pipe from rotating during testing. At the same time, the adjustability of the testing wheel ensures the accuracy and stability of the testing. In this invention, during the inspection process, when a non-compliant inner diameter of the plastic pipe is encountered, the inspection wheel is pressed, causing the inspection rod to move. This, in turn, presses the rocker plate, causing the marking head at the top of the marking rod to contact the inner wall of the pipe and draw a marking line. After the inspection wheel returns to its original position, the marking head automatically separates without affecting subsequent inspections. This automatic marking method allows staff to quickly locate non-compliant positions and conduct targeted re-inspections, improving the efficiency and accuracy of quality inspection. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the skateboard structure of the present invention; Figure 5 This is a schematic diagram of the mounting sleeve and guide sleeve structure of the present invention; Figure 6 This is a partial cross-sectional view of the guide sleeve and lifting screw of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point B.

[0017] Legend: 11. Base; 12. Support roller; 13. Detection shaft; 14. Drive motor; 21. Guide groove; 22. Drive screw; 23. Guide block; 24. Slide plate; 25. Guide frame; 26. Adjusting block; 27. Adjusting screw; 28. Clamping plate; 31. Mounting ball groove; 32. Supporting ball; 41. Mounting sleeve; 42. Guide sleeve; 43. Lifting screw; 44. Threaded sleeve; 51. Mounting plate; 52. Detection rod; 53. Mounting bracket; 54. Detection wheel; 55. Spring 1; 61. Marking rod; 62. Mounting groove; 63. Marking head; 64. Spring 2; 71. Through port; 72. Rotating shaft; 73. Rocker; 74. Torsion spring. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0019] Reference Figure 1-3 As shown, the present invention provides a technical solution: a device for detecting the inner diameter of plastic pipes, including a base 11 and two support rollers 12 symmetrically fixedly installed on the top surface of the base 11. A detection shaft 13 is rotatably installed on the side of the base 11. A drive motor 14 with its output end fixedly connected to the end of the detection shaft 13 is fixedly installed on the side of the base 11. A plurality of evenly distributed mounting ball grooves 31 are opened on the outer wall of the support rollers 12. Supporting balls 32 are movably installed on the inner wall of the mounting ball grooves 31.

[0020] First, the plastic pipe needs to be fed. During feeding, the plastic pipe can be pushed onto the two support rollers 12. The plastic pipe can then contact the support ball 32 in the mounting groove 31, so the plastic pipe can be easily pushed on the support rollers 12.

[0021] Reference Figure 1 , Figure 2 and Figure 4 As shown, a positioning component is provided at the top end of the base 11. The positioning component includes a guide groove 21 formed on the top surface of the base 11. A drive screw 22 is rotatably mounted on the inner wall of the guide groove 21. The drive screw 22 is connected to the output end of the drive motor 14 through a driven wheel and a synchronous belt. A guide block 23 that is screwed to the drive screw 22 is slidably mounted on the inner wall of the guide groove 21. A slide plate 24 is fixedly mounted on the top surface of the guide block 23. Two sets of fixing structures are symmetrically arranged on the top surface of the slide plate 24. The fixed structure includes a guide frame 25 fixedly installed on the top surface of the slide plate 24. Two adjusting blocks 26 are slidably installed on the inner wall of the guide frame 25. An adjusting screw 27 is rotatably installed on the inner wall of the guide frame 25, and the adjusting blocks 26 are screwed to the adjusting screw 27. The threads on both sides of the outer wall of the adjusting screw 27 are opposite in direction. The top end of the adjusting screw 27 passes through the top surface of the guide frame 25 and is fixedly installed with a knob. A clamping plate 28 is rotatably installed on the side of the adjusting block 26.

[0022] Workers can fix the plastic pipe. After the plastic pipe is loaded, its end can be located on the side of the guide frame 25. At this time, the two clamps 28 on both sides are located on the inside of the plastic pipe. Workers can rotate the two knobs. When the knobs are rotated, they can drive the adjusting screw 27 to rotate. The side of the adjusting block 26 is in contact with the inner wall of the guide frame 25 and is screwed to the adjusting screw 27. The threads on the outer walls of the adjusting screw 27 on both sides are opposite. Therefore, when the knob drives the adjusting screw 27 to rotate, it can drive the two adjusting blocks 26 to slide in opposite directions along the guide frame 25, thereby driving the clamps 28 to move and lift the inner wall of the plastic pipe, so that the plastic pipe is fixed and prevents rotation during the testing process.

[0023] Reference Figure 5 and Figure 6 As shown, a mounting sleeve 41 is fixedly fitted to the end of the detection shaft 13. A detection assembly is provided on the outer wall of the mounting sleeve 41. The detection assembly includes a mounting plate 51 provided on the outer wall of the mounting sleeve 41. A detection rod 52 is provided through one end of the mounting plate 51. A mounting bracket 53 is fixedly installed on the top end of the detection rod 52. A detection wheel 54 is rotatably installed on the inner wall of the mounting bracket 53. A spring 55 is fitted on the outer wall of the detection rod 52. The two ends of the spring 55 are fixedly connected to the detection rod 52 and the mounting plate 51, respectively. A support structure is provided between the mounting plate 51 and the mounting sleeve 41. The support structure includes a guide sleeve 42 fixedly installed on the outer wall of the mounting sleeve 41. A lifting screw 43 is slidably installed on the inner wall of the guide sleeve 42 through a sliding groove and a slider. The mounting plate 51 is fixedly connected to one end of the lifting screw 43 located outside the guide sleeve 42. A threaded sleeve 44 is rotatably installed at the end of the guide sleeve 42, and the threaded sleeve 44 is screwed to the lifting screw 43.

[0024] When the plastic pipe is pushed to the end and contacts the guide frame 25, the feeding of the plastic pipe is completed. At this time, the end of the detection shaft 13 is located inside the end of the plastic pipe and is concentric. Then, the operator can adjust the position of the detection wheel 54 according to the inner diameter of the plastic pipe. During adjustment, the threaded sleeve 44 can be rotated. The lifting screw 43 is slidably connected to the inner wall of the guide sleeve 42 through the slide groove and the slider. The lifting screw 43 is screwed to the threaded sleeve 44. Therefore, when the threaded sleeve 44 rotates, it can drive the lifting screw 43 to slide along the guide sleeve 42, thereby adjusting the position of the detection wheel 54 so that the outer wall of the detection wheel 54 can fit against the inner wall of the plastic pipe.

[0025] Reference Figure 6 and Figure 7 As shown, a marking rod 61 is provided through the other end of the mounting plate 51. A mounting groove 62 is provided at the end of the marking rod 61. A marking head 63 is slidably installed on the inner wall of the mounting groove 62. A spring 64 is fixedly installed between the marking head 63 and the inner wall of the mounting groove 62. The lifting screw 43 has a through-hole 71 at one end located outside the guide sleeve 42. A rotating shaft 72 is rotatably mounted on the inner wall of the through-hole 71. The rotating shaft 72 is located in the through-hole 71 on the side close to the detection rod 52. A rocker plate 73 is fixedly fitted on the outer wall of the rotating shaft 72. The two ends of the rocker plate 73 are located below the detection rod 52 and the marking rod 61, respectively. A torsion spring 74 is fitted on the end of the rotating shaft 72, and the two ends of the torsion spring 74 are fixedly connected to the rotating shaft 72 and the through-hole 71, respectively.

[0026] During testing, the drive motor 14 can be turned on to rotate the detection shaft 13. When the detection shaft 13 rotates, it drives the mounting sleeve 41, the detection wheel 54, and the marking rod 61 to rotate. In normal testing, the detection wheel 54 is in contact with the inner wall of the plastic pipe, while the marking rod 61 is positioned below the detection wheel 54 and does not contact the inner wall of the plastic pipe. When the drive motor 14 rotates the detection shaft 13, it drives the drive screw 22 to rotate via the driven wheel and synchronous belt. The guide block 23 is screwed to the drive screw 22. Therefore, when the drive screw 22 rotates, it drives the guide block 23, the slide plate 24, and the guide frame 25 to slide along the guide groove 21, pushing the pipe to be tested. This allows the plastic pipe to slide through the support ball 32 on the outer wall of the support roller 12. Combined with the rotation of the detection shaft 13, the detection wheel 54 can perform a full-range inspection of the inner diameter of the plastic pipe. The inspection process involves several steps. If, during the inspection, the inner diameter of the plastic pipe is found to be unqualified, the inspection wheel 54 will press against the unqualified location. The inspection wheel 54, through the mounting bracket 53, will press against the inspection rod 52. As the inspection rod 52 moves, it will press against the rocker plate 73, causing the rocker plate 73 and the rotating shaft 72 to rotate. The other end of the rocker plate 73 will push against the marking rod 61, causing the marking head 63 in the mounting groove 62 at the top of the marking rod 61 to contact the inner diameter of the plastic pipe and draw a marking line. When the inspection wheel 54 returns to the normal inner diameter position, the inspection rod 52 will reset under the action of the spring 55, and the marking head 63 will separate from the inner wall of the plastic pipe, allowing normal inspection to continue. After the inspection is completed, the staff can re-inspect the area of ​​the marking line on the inner wall of the plastic pipe to determine the qualification of the inner diameter of the plastic pipe.

[0027] Working principle: When in use, the plastic pipe needs to be fed first. During feeding, the plastic pipe can be pushed onto the two support rollers 12. The plastic pipe can contact the support ball 32 in the ball groove 31, so the plastic pipe can be easily pushed on the support rollers 12. When the end of the plastic pipe contacts the guide frame 25, the feeding of the plastic pipe is completed. At this time, the end of the detection shaft 13 is located inside the end of the plastic pipe and is concentric. Then, the operator can adjust the position of the detection wheel 54 according to the inner diameter of the plastic pipe. During adjustment, the threaded sleeve 44 can be rotated. The lifting screw 43 is slidably connected to the inner wall of the guide sleeve 42 through the slide groove and the slider. The lifting screw 43 is screwed to the threaded sleeve 44. Therefore, when the threaded sleeve 44 rotates, it can drive the lifting screw 43 to slide along the guide sleeve 42, thereby adjusting the position of the detection wheel 54 so that the outer wall of the detection wheel 54 can fit against the inner wall of the plastic pipe. After adjusting the detection wheel 54, the operator can fix the plastic pipe. After the plastic pipe is loaded, its end can be located on the side of the guide frame 25. At this time, the two clamps 28 on both sides are located on the inside of the plastic pipe. The operator can rotate the two knobs. When the knobs are rotated, they can drive the adjusting screw 27 to rotate. The side of the adjusting block 26 is in contact with the inner wall of the guide frame 25 and is screwed to the adjusting screw 27. The threads on the outer walls of the adjusting screw 27 on both sides are opposite. Therefore, when the knob drives the adjusting screw 27 to rotate, it can drive the two adjusting blocks 26 to slide in opposite directions along the guide frame 25, thereby driving the clamps 28 to move and lift the inner wall of the plastic pipe, so that the plastic pipe is fixed and prevents rotation during the inspection process. During testing, the drive motor 14 can be turned on to rotate the detection shaft 13. When the detection shaft 13 rotates, it can drive the mounting sleeve 41, the detection wheel 54, and the marking rod 61 to rotate. In normal testing, the detection wheel 54 is in contact with the inner wall of the plastic pipe, while the marking rod 61 is lower than the detection wheel 54 and will not contact the inner wall of the plastic pipe. When the drive motor 14 drives the detection shaft 13 to rotate, it can drive the drive screw 22 to rotate through the driven wheel and the synchronous belt. The guide block 23 is screwed to the drive screw 22. Therefore, when the drive screw 22 rotates, it can drive the guide block 23, the slide plate 24, and the guide frame 25 to slide along the guide groove 21, pushing the pipe to be tested. This allows the plastic pipe to slide through the support ball 32 on the outer wall of the support roller 12. Combined with the rotation of the detection shaft 13, the detection wheel 54 can perform all-round testing of the inner diameter of the plastic pipe. If, during the inspection process, an area of ​​the plastic pipe's inner diameter is found to be non-compliant, the inspection wheel 54 can be pressed against the non-compliant location. The inspection wheel 54, through the mounting bracket 53, presses against the inspection rod 52. As the inspection rod 52 moves, it presses against the rocker plate 73, causing the rocker plate 73 and the rotating shaft 72 to rotate. The other end of the rocker plate 73 can push against the marking rod 61, causing the marking head 63 in the mounting groove 62 at the top of the marking rod 61 to contact the inner diameter of the plastic pipe and draw a marking line. When the inspection wheel 54 returns to the normal inner diameter position, the inspection rod 52 can be reset under the action of the spring 55, and the marking head 63 separates from the inner wall of the plastic pipe, allowing normal inspection to continue. After the inspection is completed, the staff can re-inspect the area of ​​the marking line on the inner wall of the plastic pipe to determine the compliance of the inner diameter of the plastic pipe.

[0028] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A device for detecting the inner diameter of a plastic pipe, comprising a base (11) and two support rollers (12) symmetrically fixedly installed on the top surface of the base (11), wherein a detection shaft (13) is rotatably mounted on the side of the base (11), and a drive motor (14) whose output end is fixedly connected to the end of the detection shaft (13) is fixedly mounted on the side of the base (11), characterized in that: The top end of the base (11) is provided with a positioning component, and the end of the detection shaft (13) is fixedly fitted with an installation sleeve (41), and the outer wall of the installation sleeve (41) is provided with a detection component. The positioning component includes a guide groove (21) formed on the top surface of the base (11), a drive screw (22) is rotatably mounted on the inner wall of the guide groove (21), a guide block (23) screwed to the drive screw (22) is slidably mounted on the inner wall of the guide groove (21), a slide plate (24) is fixedly mounted on the top surface of the guide block (23), and two sets of fixing structures are symmetrically arranged on the top surface of the slide plate (24). The detection assembly includes a mounting plate (51) disposed on the outer wall of the mounting sleeve (41), a detection rod (52) is disposed through one end of the mounting plate (51), a mounting bracket (53) is fixedly installed on the top end of the detection rod (52), a detection wheel (54) is rotatably installed on the inner wall of the mounting bracket (53), a spring (55) is fitted on the outer wall of the detection rod (52), and the two ends of the spring (55) are fixedly connected to the detection rod (52) and the mounting plate (51) respectively, and a support structure is provided between the mounting plate (51) and the mounting sleeve (41).

2. The device for detecting the inner diameter of plastic pipes according to claim 1, characterized in that: The drive screw (22) and the output end of the drive motor (14) are connected by a driven wheel and a synchronous belt.

3. The device for detecting the inner diameter of plastic pipes according to claim 1, characterized in that: The outer wall of the support roller (12) is provided with a number of uniformly distributed mounting ball grooves (31), and the inner wall of the mounting ball grooves (31) is movably mounted with a support ball (32).

4. The device for detecting the inner diameter of plastic pipes according to claim 1, characterized in that: The fixing structure includes a guide frame (25) fixedly installed on the top surface of the slide plate (24). Two adjusting blocks (26) are slidably installed on the inner wall of the guide frame (25). An adjusting screw (27) is rotatably installed on the inner wall of the guide frame (25), and the adjusting blocks (26) are screwed to the adjusting screw (27). A clamping plate (28) is rotatably installed on the side of the adjusting blocks (26).

5. The device for detecting the inner diameter of plastic pipes according to claim 4, characterized in that: The threads on both sides of the outer wall of the adjusting screw (27) are opposite, and the top of the adjusting screw (27) passes through the top surface of the guide frame (25) and is fixedly mounted with a knob.

6. The device for detecting the inner diameter of plastic pipes according to claim 1, characterized in that: The support structure includes a guide sleeve (42) fixedly installed on the outer wall of the mounting sleeve (41). A lifting screw (43) is slidably installed on the inner wall of the guide sleeve (42) through a sliding groove and a slider. The mounting plate (51) is fixedly connected to one end of the lifting screw (43) located outside the guide sleeve (42). A threaded sleeve (44) is rotatably installed at the end of the guide sleeve (42), and the threaded sleeve (44) is screwed to the lifting screw (43).

7. The device for detecting the inner diameter of plastic pipes according to claim 6, characterized in that: A marking rod (61) is provided through the other end of the mounting plate (51). An installation groove (62) is provided at the end of the marking rod (61). A marking head (63) is slidably installed on the inner wall of the installation groove (62). A spring (64) is fixedly installed between the marking head (63) and the inner wall of the installation groove (62).

8. The device for detecting the inner diameter of plastic pipes according to claim 7, characterized in that: The lifting screw (43) has a through-hole (71) at one end outside the guide sleeve (42). A rotating shaft (72) is rotatably installed on the inner wall of the through-hole (71). A rocker plate (73) is fixedly fitted on the outer wall of the rotating shaft (72). A torsion spring (74) is fitted on the end of the rotating shaft (72), and the two ends of the torsion spring (74) are fixedly connected to the rotating shaft (72) and the through-hole (71) respectively.

9. The device for detecting the inner diameter of plastic pipes according to claim 8, characterized in that: The rotating shaft (72) is located in the port (71) on one side near the detection rod (52).

10. The device for detecting the inner diameter of plastic pipes according to claim 8, characterized in that: The two ends of the rocker (73) are located below the detection rod (52) and the marking rod (61), respectively.

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