Nonmetal corrugated pipe cutting detection device

Abstract

The nonmetal corrugated pipe cutting detection device comprises a shell, one side of the shell is open, a cover plate is fixed to the open side of the shell through bolts, a round pipe is fixed to the middle of the shell in a penetrating mode and located outside the shell, and a metal pipe is fixed to the interior of the round pipe in a penetrating mode. Two symmetrical first detection holes are formed in the side wall of the top of the metal pipe, and two symmetrical second detection holes are formed in the positions, located above the two first detection holes, of the top of the metal pipe. According to the utility model, the housing, the metal pipe, the CPU processing board, the infrared detection device and the single-chip microcomputer are arranged, and the corrugated pipe to be detected enters the metal pipe. And the infrared detection device is used for detecting the change of corrugations of the to-be-detected corrugated pipe. When the to-be-detected corrugated pipe continuously passes through the metal pipe, the difference change of the shielding light intensity of the corrugated section and the smooth section is converted into the difference change of voltage signals, and a single-chip microcomputer on the CPU processing board collects and processes detection signals.

Description

Technical Field

[0001] This utility model relates to the field of non-metallic corrugated pipe cutting technology, and in particular to a non-metallic corrugated pipe cutting detection device. Background Technology

[0002] Non-metallic corrugated pipes are widely used in chemical, power, medical, and environmental protection fields due to their corrosion resistance, flexibility, and strong insulation. The cutting process must balance precision with the integrity of the pipe structure to avoid delamination, burrs, or deformation. Cutting methods include laser cutting, ultrasonic cutting, and mechanical cutting. Laser cutting is highly efficient and automated, while waterjet cutting has no heat-affected zone and is suitable for thick-walled pipes. Choosing the appropriate process can significantly improve production quality and efficiency.

[0003] Non-metallic corrugated pipes are continuously extruded and need to be cut at corresponding positions in each segment. However, existing cutting equipment cannot achieve precise cutting by accurately detecting non-metallic corrugated pipes. Therefore, this patent proposes a non-metallic corrugated pipe cutting detection device to accurately identify the outlet mark (smooth section) of the non-metallic corrugated pipe and provide a signal as a standard reference position for the next cutting step. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a non-metallic corrugated pipe cutting and detection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a non-metallic corrugated pipe cutting and detection device, comprising a housing, one side of which is open, and a cover plate is fixed to the open side of the housing by bolts; a circular tube is inserted through and fixed in the middle of the housing, and the circular tube is located outside the housing; a metal tube is inserted through and fixed inside the circular tube; two symmetrical first detection holes are opened on the top sidewall of the metal tube, and two symmetrical second detection holes are opened above the two first detection holes on the top of the metal tube; both the first and second detection holes are located inside the housing; a CPU processing board is fixed inside the housing; a first infrared transceiver tube is fixed on the surface of the CPU processing board and on both sides of the two first detection holes; a second infrared transceiver tube is fixed on the surface of the CPU processing board and on both sides of the two second detection holes; and a microcontroller is mounted on the surface of the CPU processing board.

[0006] Furthermore, a bracket is fixed to the lower surface of the outer shell, and a base plate is fixedly connected to the bottom end of the bracket, with mounting holes provided on the base plate.

[0007] Furthermore, the metal tube is fixed inside the round tube by bolts, and the CPU processing board and the cover plate both have round holes in the middle for the metal tube to pass through.

[0008] Furthermore, both the first infrared transceiver and the second infrared transceiver include an infrared emitting tube and an infrared receiving tube.

[0009] The beneficial effects of this utility model are:

[0010] In use, this utility model relates to a non-metallic corrugated pipe cutting and inspection device, comprising a housing, a metal pipe, a CPU processing board, an infrared detection device, and a microcontroller. The corrugated pipe to be tested enters the metal pipe. The infrared detection device detects changes in the corrugation of the corrugated pipe. As the corrugated pipe continuously passes through the metal pipe, the difference in light intensity between the corrugated and smooth sections is converted into a difference in voltage signal. The microcontroller on the CPU processing board collects and processes the detection signals. This device uses the infrared detection device to intelligently determine the cutting point position, and the microcontroller collects, processes, compares, and outputs signals to the PLC of the cutting equipment, thereby controlling the operation of the drive motor and the cutter head motor. The device is dimensionally accurate and fully automatic, requiring no manual operation. Attached Figure Description

[0011] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 : First perspective view of this utility model;

[0013] Figure 2 : Second perspective view of this utility model;

[0014] Figure 3 : A cross-sectional view of this utility model;

[0015] Figure 4 The present utility model Figure 3 Enlarged view of point A in the middle.

[0016] The attached figures are labeled as follows:

[0017] 1. Outer shell; 2. Cover plate; 3. Round tube; 4. Metal tube; 51. First detection hole; 52. Second detection hole; 6. CPU processing board; 71. First infrared transceiver tube; 72. Second infrared transceiver tube; 8. Microcontroller; 9. Bracket; 10. Base plate; 11. Mounting hole; 12. Corrugated tube to be tested. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1-4 As shown, a non-metallic corrugated pipe cutting detection device is disclosed, comprising a housing 1, one side of which is open and a cover plate 2 is fixed to the open side of the housing 1 by bolts. A circular tube 3 is inserted through and fixed in the middle of the housing 1, and the circular tube 3 is located outside the housing 1. A metal tube 4 is inserted through and fixed inside the circular tube 3. Two symmetrical first detection holes 51 are opened on the top sidewall of the metal tube 4, and two symmetrical second detection holes 52 are opened on the top of the metal tube 4 above the two first detection holes 51. The first detection holes 51 and the second detection holes 52 are both located inside the housing 1. A CPU processing board 6 is fixed inside the housing 1. A first infrared transceiver tube 71 is fixed on the surface of the CPU processing board 6 and on both sides of the two first detection holes 51. A second infrared transceiver tube 72 is fixed on the surface of the CPU processing board 6 and on both sides of the two second detection holes 52. A microcontroller 8 is mounted on the surface of the CPU processing board 6.

[0020] A bracket 9 is fixed to the lower surface of the outer casing 1, and a base plate 10 is fixedly connected to the bottom end of the bracket 9. The base plate 10 has mounting holes 11.

[0021] In this embodiment, the device can be fixedly installed on the corrugated pipe cutting equipment through the mounting holes 11 on the base plate 10.

[0022] The metal tube 4 is fixed inside the round tube 3 by bolts. The CPU processing board 6 and the cover plate 2 both have round holes in the middle for the metal tube 4 to pass through.

[0023] In this embodiment, the metal tube 4 serves as a guide for the corrugated tube 12 under test, allowing it to pass smoothly through the device.

[0024] Both the first infrared transceiver tube 71 and the second infrared transceiver tube 72 include an infrared emitting tube and an infrared receiving tube.

[0025] like Figure 3As shown, in this embodiment, the infrared emitting tube and infrared receiving tube of the first infrared transceiver tube 71 are located on both sides of the two first detection holes 51, and the infrared emitting tube and infrared receiving tube of the second infrared transceiver tube 72 are located on both sides of the two second detection holes 52. The first infrared transceiver tube 71 and the second infrared transceiver tube 72 can respectively detect corrugated pipes 12 of different diameters. When the corrugated pipe 12 with a smaller diameter passes through the metal tube 4, the top edge of the corrugated pipe 12 is exactly between the two first detection holes 51, and the top edge of the corrugated pipe 12 with a larger diameter is exactly between the two second detection holes 52.

[0026] In this embodiment, the photoelectric detection circuit section: The structure of the corrugated tube 12 under test has corrugated sections and smooth sections. This design detects the outer edge features of the corrugated tube 12 under test. Due to the periodic concave-convex structure of the corrugated section, the optical path is periodically blocked, and the receiving end generates a pulse signal; the smooth section is continuously transparent, and the signal is stable. Optical characteristics for corrugated section detection: The periodic concave-convex structure of the corrugated outer edge of the corrugated tube 12 under test causes regular on-off of the optical path: Transmittance changes: the corrugated convexity blocks the optical path (transmittance decreases), and the groove allows light to pass through (transmittance increases). Typical signal: A 200-500Hz pulse sequence is generated (related to the corrugation pitch and transmission speed). Periodic high-level pulses appear during the corrugated section. Optical characteristics for smooth section detection: The smooth section does not block the light, so when the smooth section passes, the light will continue to pass through, and the receiving end maintains a low level. Typical signal: A stable and continuous low level (0.1-0.3V).

[0027] The CPU processing board 6 is equipped with a voltage amplifier and an analog-to-digital converter (ADC). The CPU processing board 6 is connected to the PLC controller of the cutting equipment.

[0028] The voltage amplifier section addresses this issue. Since the voltage signal output by the sensor may be relatively weak, especially during the transition from the rippled section to the smooth section where the signal change may be minimal, a voltage amplifier is needed to amplify the signal. An appropriate amplification factor ensures the signal is strong enough for subsequent processing. Simultaneously, a filtering circuit is incorporated to remove high-frequency noise or low-frequency interference, ensuring signal stability.

[0029] Analog-to-Digital Converter (ADC): The amplified analog signal needs to be converted into a digital signal so that the PLC controller can process it. Here, the ADC resolution (10-bit or 12-bit) needs to be considered, as this will affect the detection accuracy. Additionally, the conversion speed is also crucial, especially in high-speed cutting scenarios, where the ADC's sampling rate must be fast enough to capture position changes promptly.

[0030] After the signal is transmitted to the PLC controller of the cutting equipment, the PLC controller needs to determine when to trigger the cutting based on the digital signal. This may require setting a threshold value; when the signal exceeds or falls below a certain value, the PLC controller considers the start or end position of the smooth segment detected. The PLC's logic control section needs to be programmed, for example, to start the cutting head after a certain delay (considering the mechanical response time) when a smooth segment is detected. Simultaneously, signal jitter needs to be handled, for example, through software de-jittering to avoid false triggering.

[0031] Working principle: The entire system works as follows: The corrugated tube 12 under test passes through the inside of the metal tube 4 (taking a small-diameter corrugated tube 12 as an example). The first infrared transceiver tubes 71 located on both sides of the metal tube 4 detect the corrugation changes of the corrugated tube 12 under test and feed the signal back to the microcontroller 8 to accurately determine the position of the corrugated tube 12 under test. Then, the signal is fed back to the PLC controller of the cutting equipment, which controls the cutting mechanism of the cutting equipment to perform cutting. Therefore, the entire workflow is: first infrared transceiver tube 71 detects position changes → signal amplification and filtering → analog-to-digital conversion → PLC processing → driving cutting.

[0032] The application scenario is automated cutting in industrial production, requiring high precision and efficiency. Therefore, the system needs to be reliable and stable, maintaining accuracy over long periods of operation. This solution achieves reliable binary discrimination between corrugated and smooth sections by accurately capturing the time-frequency characteristics of light transmission and reception. It is particularly suitable for scenarios with strict requirements for non-destructive surface inspection, such as air conditioning drainage corrugated pipes, food-grade corrugated pipes, and automotive oil pipes. Real-world testing data shows that the system's repeatability in inspecting pipes with a diameter of φ2-50mm can reach ±0.01mm.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A non-metallic bellows cutting detection device, characterized by: The utility model relates to a kind of infrared detection device, including shell (1), the shell (1) one side is open design, and the open side of shell (1) is bolted with cover plate (2), the middle part of shell (1) is penetrated and fixed with round pipe (3), and round pipe (3) is located outside shell (1), the inside of round pipe (3) is penetrated and fixed with metal pipe (4), the top side wall of metal pipe (4) is equipped with two symmetrical first detection holes (51), and the top of metal pipe (4) is equipped with two symmetrical second detection holes (52) above two first detection holes (51), the first detection hole (51) and second detection hole (52) are located inside shell (1), the inside of shell (1) is fixed with CPU processing board (6), the surface of CPU processing board (6) and be located two first detection holes (51) both sides are fixed with first infrared emitting tube (71), the surface of CPU processing board (6) and be located two second detection holes (52) both sides are fixed with second infrared emitting tube (72), the surface of CPU processing board (6) is installed with single-chip microcomputer (8).

2. A non-metallic bellows cut detection device according to claim 1, wherein: The bottom surface of the shell (1) is fixed with a support (9), and the bottom end of the support (9) is fixedly connected with a bottom plate (10), and the bottom plate (10) is provided with a mounting hole (11).

3. A non-metallic bellows cutting detection device according to claim 1, wherein: The metal pipe (4) is bolted inside the round pipe (3), and the middle part of the CPU processing board (6) and the cover plate (2) is provided with a circular hole for passing through the metal pipe (4).

4. A non-metallic bellows cut detection device according to claim 1, wherein: The first infrared emitting tube (71) and the second infrared emitting tube (72) each include an infrared emitting tube and an infrared receiving tube.

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