Apparatus and method for rapid on-site testing of plastic pipe dimensional specifications

Abstract

An apparatus for testing plastic pipe dimensional specifications, comprising: a machine table (1), a fixed disc (1201), and a fixed pressing clamp (12). A pair of slide rails (8) are provided on two sides of the top of the machine table (1); a first slide table (6) and a second slide table (7) are respectively slidably connected between the two slide rails (8); a plurality of driving rollers (15) are rotatably connected to both inner sides of the second slide table (7), and the plurality of driving rollers (15) are transversely arranged side by side on both inner sides of the second slide table (7); an adapter gear disc (13) is fixedly mounted on one side of the fixed disc (1201); a plurality of connecting pins (1202) are fixedly connected between the fixed pressing clamp (12) and the fixed disc (1201); and a pair of cameras (1302) are slidably mounted on the side of the adapter gear disc (13) facing the second slide table (7). The present invention further relates to a method used in an apparatus for testing plastic pipe dimensional specifications. When a pipe opening is small, the moving radii of the two cameras (1302) decrease, making it easier to photograph the edge of the pipe, thereby improving the adaptability of the apparatus.

Description

Device and method for on-site rapid testing of plastic pipe specifications and sizes TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe testing, in particular to a device and method for on-site rapid testing of plastic pipe specifications and sizes. BACKGROUND

[0002] In recent years, in industrial and agricultural production and life, plastic pipes such as hard polyvinyl chloride (PVC-U) pipes, polyethylene (PE) pipes, and polypropylene (PP) pipes have been widely used, and more and more enterprises have joined the production and use of plastic pipes. These enterprises and users are eager to obtain plastic pipe products that meet relevant standards and are affordable. Therefore, they attach great importance to the inspection and testing of plastic pipes, especially the rapid testing on the production or construction site to meet the actual needs of dynamic adjustment during production and use. The inner and outer diameters, wall thickness, and roundness are the most basic parameters for on-site rapid testing. If these parameters can be rapidly tested, the extrusion process can be adjusted in time to ensure the quality of the pipes. Currently, the testing of plastic pipe specifications and sizes mainly uses manual measurement methods, such as using vernier calipers and diameter gauges, which have high precision but high labor costs, a complicated process, and low efficiency. Each group of pipe testing requires a lot of time, and cannot meet the rapid testing requirements in large-scale production or construction sites. At the same time, due to the influence of human factors such as the skill level, experience, and attention of the operator, errors or even mistakes are easily made, the data traceability is poor, and the whole process quality analysis and management cannot be realized. In addition to manual measurement, there is also a laser measurement method, which mainly uses laser measurement technology for non-destructive testing, but the equipment is expensive, the one-time investment is high, the technical requirements for the operator are high, and the maintenance is difficult.

[0003] Patent "CN117685920A" proposes a pipe size detection device that automatically detects the wall thickness and outer diameter of the pipe at both ends through a linear motion assembly, a positioning and clamping assembly, and a wall thickness detection assembly. However, the mechanical components (such as the linear motion assembly and the positioning and clamping assembly) in this technology may wear or loosen over time, leading to increased detection errors. In addition, the mechanical system needs to be adjusted or replaced with a larger hardware when facing different types and specifications of pipes, mainly relying on physical measurement and manual recording, with limited data processing and analysis capabilities. The paper "Pipe Size Feature Parameter Acquisition and Detection System Based on Image Recognition" designs an acquisition and detection system based on image recognition, which mainly includes a mechanical structure part, an image acquisition part, and an image processing part. However, this device is mainly used for performance testing of metal pipes, with small pipe specifications, limited application types, single testing parameters, and limited application.

[0004] In this context, there is an urgent need to develop a device and method for rapid on-site testing of plastic pipe specifications, which can meet the needs of different plastic pipes, realize rapid measurement of various specification parameters such as inner and outer diameters, wall thickness, and roundness, have certain precision, data traceability, and realize whole-process quality management and analysis. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a device and method for rapid on-site testing of plastic pipe specifications, which solves the problems mentioned in the above background.

[0006] The present application provides the following technical solution: a device and method for rapid on-site testing of plastic pipe specifications, comprising: a machine table, the machine table is provided with a pair of slide rails on both sides of the top, a first sliding table and a second sliding table are respectively connected between the two slide rails, a plurality of drive rollers are rotatably connected on both sides of the second sliding table, the plurality of drive rollers are arranged horizontally side by side on both sides of the second sliding table, the shafts of the plurality of drive rollers on the same side of the second sliding table are penetrated and installed with an extension shaft, a connecting rod is fixedly installed at one end of each extension shaft, a support seat is fixedly installed on the first sliding table, a fixed clamp is fixedly installed on the top of the support seat, a fixed disc is rotatably connected on one side of the fixed clamp, an adapter gear disc is fixedly installed on one side of the fixed disc, a plurality of connecting pins are fixedly connected between the fixed clamp and the fixed disc, a pair of cameras are slidably installed on one side of the adapter gear disc facing the second sliding table, a pair of support cylinders are slidably connected on the first sliding table, a pair of interface gears are rotatably connected at the common end of the two support cylinders, the adapter gear disc is rollingly connected with the two interface gears, and the connecting rod and the interface gear are inserted and installed together in the middle part.

[0007] Preferably, a second air cylinder is fixedly arranged near each slide rail of the machine table, one end of the movable rod of each second air cylinder is fixedly installed on the second sliding table, first racks are fixedly installed on both sides of the second sliding table, a transmission gear is arranged near each slide rail of the machine table, a second rack is slidably connected near the bottom of the transmission gear, the first rack is drivingly matched with the second rack through the transmission gear, and one end of the second rack extends to both sides of the first sliding table and is fixedly installed on the first sliding table.

[0008] Preferably, the second sliding table is fixedly provided with first air cylinders on both sides, linear guide rails on the other two sides, and the extension shafts and the linear guide rails are slidably connected together, the first air cylinders are respectively fixedly provided with moving plates on the movable rods, and the extension shafts are rotatably connected to the moving plates at both ends.

[0009] Preferably, the material of the semi-arc guide rail is soft rubber, and the driving rollers are at least three, and each driving roller provides a pipe support point at the edge.

[0010] Preferably, the first sliding table and the second sliding table are provided with tray structures extending towards the edges of the machine on one side, the tray of the second sliding table is fixedly provided with a motor on one side, the output shaft of the motor is sleeved with a driving disc, the other ends of the extension shafts are sleeved with a first rotating disc and a second rotating disc respectively, the driving disc, the first rotating disc and the second rotating disc are connected together through a belt, and the other side of the tray of the second sliding table is fixedly provided with a pair of limiting seats, each limiting seat is slidably connected with a pressing roller, and the pressing roller and the outer ring of the belt abut.

[0011] Preferably, the first sliding table is fixedly provided with sliding rheostats on both sides of the top, the second springs are fixedly connected to the bottom of the sliding rheostats, the variable resistance blocks are fixedly provided on one end of the second springs, the variable rods are fixedly provided on one end of the moving plates opposite to each other, the variable rods and the variable resistance blocks are slidably connected, when the extension shafts move relatively, the variable rods press the second springs to make the variable resistance blocks slide on the bottom of the sliding rheostats, and the sliding rheostats and the electromagnets are electrically connected through wires.

[0012] Preferably, the moving plates are respectively provided with front guide rods and rear guide rods on one end and the other end respectively, the front guide rods are fixedly provided with support top seats on one end, the rear guide rods are fixedly provided on the other end of the moving plates, the rear guide rods are provided with folding edges extending upwards and having an arc on one end, and the folding edges are respectively provided with height limiting rods on the side.

[0013] Preferably, the first sliding table is provided with an extension pipe suspended in the middle of the top, the extension pipe is internally provided with a retention cavity, a plurality of ultrasonic probes are arranged on the extension pipe and can move along the radial direction of the extension pipe, the bottom of each ultrasonic probe is communicated with the inside of the extension pipe, a plurality of extrusion holes are arranged on the outer ring of the extension pipe, an auxiliary liquid cylinder is fixedly provided on one side of the tray of the first sliding table, a hydraulic pump is fixedly provided on the other side of the tray of the first sliding table, the extrusion holes are communicated with the auxiliary liquid cylinder through the retention cavity, and a plurality of light supplementing lamps are arranged on one side of the adapter gear disc close to the shaft.

[0014] Preferably, the bottom of the machine is fixedly provided with a control cabinet, a sensing unit is arranged in the control cabinet, four legs are fixedly arranged around the bottom of the machine, each leg is provided with a telescopic and adjustable roller, and a display is fixedly arranged at one corner of the top of the machine.

[0015] Preferably, the use method comprises the following steps:

[0016] a. Preparation stage:

[0017] The image preprocessing process converts the transmitted color image into a gray image, removes noise in the image, enhances the contrast and definition of the image, identifies the edges in the image, binarizes the image, and prepares the camera for standby;

[0018] b. Production line positioning:

[0019] The first time, the edge of the machine and the terminal of the production line are preliminarily calibrated by artificial close, so that the axis of the adapter gear disc is located between the two drive rollers. When the pipe is blanked in the production line, the two drive rollers support the pipe edge, the camera repeatedly shoots the front, confirms the two points of the pipe edge, takes the middle value of the two points, the camera transmission value is displayed on the display, a coordinate system is established, if the pipe axis and the adapter gear disc axis are in the same vertical plane, the positioning is successful, if the middle value is in a certain quadrant of the coordinate system, the control cabinet drives the roller to descend, one side of the roller is controlled to rotate by the driver (existing structure, not drawn), and the accurate position of the machine is adjusted again by the driver;

[0020] c. Test stage:

[0021] First, turn on the fill light to light the inside of the pipe. After the two drive rollers contact the pipe, the two second air cylinders retract the movable rods synchronously, the first rack drives the transmission gear to rotate, the transmission gear drives the second rack to walk on the machine, so that the first sliding table and the second sliding table approach each other, the connecting rod and the butt gear butt joint, the control cabinet controls the motor to rotate, the motor drives the first turntable and the second turntable to rotate, the connecting rod drives the butt gear to rotate, and finally the butt gear drives the adapter gear disc to rotate, so that the rotating path of the camera and the rotating path of the pipe are opposite. Then the camera creates a circular parameter, determines the center and radius of the pipe to be detected, and adopts multi-point shooting on the inner and outer edges of the pipe, quickly obtains multiple sets of data, has accuracy, and the pipe rotation can detect the out-of-roundness of multiple regions of the pipe.

[0022] d. Inner diameter slope point difference detection:

[0023] When the extension pipe is located inside the pipe material, the hydraulic pump and the auxiliary liquid cylinder are simultaneously opened, so that hydraulic oil is generated inside the extension pipe, the hydraulic oil extends each ultrasonic probe radially along the extension pipe, and the coupling liquid filled in the auxiliary liquid cylinder is extruded into the pipe material through the extrusion hole after being output by the hydraulic pump, the ultrasonic probe generates ultrasonic waves after being turned on, the ultrasonic waves are emitted to the inner wall of the pipe material, and the displayed value is compared on the display to determine the size of the pipe material or whether the pipe material has a crack deformation phenomenon.

[0024] e. Line repositioning:

[0025] When one of the production lines is tested, the pipe material is timely removed, the control cabinet controls the roller to descend, the driver drives the roller to rotate, aligns the other end of the production line of the machine along the path set by the control cabinet, then the control cabinet controls the roller to ascend, the bottom of the supporting leg is grounded, and whether the position of the machine and the production line is aligned is confirmed again, if not, the step b is recycled.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. After the connecting rod and the butt gear are butt jointed, the variable rod and the variable resistor block are in contact, if it is necessary to change the distance between the two driving rollers to support different pipe materials, the first cylinder drives the moving plate to move, the synchronous belt drives the variable rod to compress or reset the second spring, so that the variable resistor block slides at the bottom of the sliding resistor, the magnetism of the electromagnet changes, when the pipe material port is small, the two moving plates need to move towards each other, therefore the variable resistor block moves towards the edge of the switching gear disc, the resistance value of the sliding resistor becomes smaller, the magnetism of the electromagnet becomes stronger, the electromagnet absorbs the camera, the motion radius of the two cameras becomes smaller, it is easier to shoot the edge of the pipe material, the adaptability of the device is improved, physical measurement and manual recording are not needed, the detection efficiency of the device is improved, and the possibility of error increase is reduced.

[0028] 2. When the first sliding table and the second sliding table are close, the extension pipe is located inside the pipe material, when the pipe material rotates, the hydraulic pump works together with the camera, the hydraulic pump drives the hydraulic oil inside the extension pipe to work, the hydraulic oil takes the extension pipe inside as a flow channel, drives each ultrasonic probe to extend outward, and the coupling agent filled in the auxiliary liquid cylinder is sprayed to the inner wall of the pipe material, in the process of rotating the pipe material, the inner wall of the pipe material is positioned by multiple points, after screening the collected data, accurate values are obtained, in the operation, the second cylinder moving rod can be driven to retract again, so that the distance between the pipe port and the first sliding table and the second sliding table becomes smaller, so that the path swept by the ultrasonic probe is the spiral path of the pipe material in the process of rotating the pipe material, the detection range is improved, and the adaptability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present application;

[0030] Figure 2 is a schematic diagram of the first sliding table structure of the present application;

[0031] Figure 3 is a schematic diagram of the adapter gear disc structure of the present application;

[0032] Figure 4 is a schematic diagram of the moving plate structure of the present application;

[0033] Figure 5 is a schematic diagram of the drive roller structure of the present application;

[0034] Figure 6 is an enlarged schematic diagram of the structure at B in Figure 1 of the present application;

[0035] Figure 7 is an enlarged schematic diagram of the structure at A in Figure 1 of the present application;

[0036] Figure 8 is a schematic diagram of the overall structure of the present application from another perspective;

[0037] Figure 9 is an enlarged schematic diagram of the structure at C in Figure 8 of the present application;

[0038] Figure 10 is a schematic diagram of the extension pipe structure of the present application;

[0039] Figure 11 is an enlarged schematic diagram of the structure at D in Figure 3 of the present application.

[0040] In the drawings: 1, machine table; 2, control cabinet; 3, leg; 4, roller; 5, display; 6, first sliding table; 601, semi-arc guide rail; 602, first spring; 603, middle piece; 604, butt joint gear; 605, support cylinder; 7, second sliding table; 701, linear guide rail; 702, first air cylinder; 8, slide rail; 9, second air cylinder; 10, motor; 11, support seat; 12, fixed clamp; 1201, fixed disc; 1202, connecting pin; 13, adapter gear disc; 1301, light supplementing lamp; 1302, camera; 1303, electromagnet; 14, first rotary disc; 15, drive roller; 1501, connecting rod; 1502, extension shaft; 16, moving plate; 17, front guide rod; 18, support top seat; 19, rear guide rod; 20, height limiting rod; 22, variable rod; 23, variable resistance block; 24, sliding variable resistor; 25, second spring; 26, first rack; 27, transmission gear; 28, second rack; 29, second rotary disc; 30, limiting seat; 31, compression roller; 32, drive disc; 33, extension pipe; 34, ultrasonic probe; 35, retention cavity; 36, extrusion hole; 37, auxiliary liquid cylinder; 38, hydraulic pump. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0042] Referring to FIGS. 1-11, a device for rapidly testing the specifications and sizes of plastic pipes on site comprises a machine table 1, a pair of slide rails 8 arranged on both sides of the top of the machine table 1, a first slide table 6 and a second slide table 7 respectively and slidably connected between the two slide rails 8, a plurality of drive rollers 15 rotatably connected to both sides of the second slide table 7, the plurality of drive rollers 15 being arranged in parallel on both sides of the second slide table 7, the shafts of the plurality of drive rollers 15 on the same side of the second slide table 7 being penetrated by an extension shaft 1502, one end of each extension shaft 1502 being fixedly connected to a connecting rod 1501, a support seat 11 fixedly installed on the first slide table 6, a fixed pressing clamp 12 fixedly installed on the top of the support seat 11, a fixed disc 1201 rotatably connected to one side of the fixed pressing clamp 12, an adapter gear disc 13 fixedly installed on one side of the fixed disc 1201, a plurality of connecting pins 1202 fixedly connected between the fixed pressing clamp 12 and the fixed disc 1201, a pair of cameras 1302 slidably installed on one side of the adapter gear disc 13 facing the second slide table 7, a pair of support cylinders 605 slidably connected to the first slide table 6, a pair of interface gears 604 rotatably connected to the common end of the two support cylinders 605, the adapter gear disc 13 and the two interface gears 604 being rollingly connected, and the connecting rod 1501 and the interface gears 604 being insertedly installed together in the middle. The two drive rollers 15 are synchronously and identically rotated, the connecting rod 1501 and the interface gears 604 are docked, the two drive rollers 15 and the adapter gear disc 13 are rollingly oriented in opposite directions, when the end of the production line is aligned with the machine table 1, the pipes can be directly discharged between the two drive rollers 15 while the production line is still in the process of production, then the first slide table 6 and the second slide table 7 are mutually approached and docked, the connecting rod 1501 is cross-shaped inserted into the shaft of the interface gears 604, the exposure time of the cameras 1302 is reduced, and the shooting quality of the cameras 1302 is enhanced, when the two drive rollers 15 need to be rotated, the extension shaft 1502 drives the drive rollers 15 to rotate, and the connecting rod 1501 can also drive the interface gears 604 to rotate, when the interface gears 604 rotate, the interface gears 604 can drive the adapter gear disc 13 to keep rolling on the fixed pressing clamp 12, thereby making the rotating direction of the cameras 1302 opposite to that of the pipes, making the edge of the pipes quickly shot by the cameras 1302, so that the running track of the pipes can be quickly reacted in the terminal control background, and the size can be quickly depicted, then the detection results are output in the computer, compared with the backup plastic pipe specification and size information such as PVC-U pipes, PE pipes, and PP pipes in the database, the result is determined whether it meets the relevant national / industry standards, and the information is backed up in the hard disk or the database, thereby improving the detection efficiency and making the operation very convenient.

[0043] Specifically, the machine table 1 is fixedly provided with a second cylinder 9 near each sliding rail 8, one end of the movable rod of each second cylinder 9 is fixedly connected to the second sliding table 7, the first rack 26 is fixedly installed on the two sides of the second sliding table 7, the machine table 1 is provided with a transmission gear 27 near each sliding rail 8, the second rack 28 is slidably connected to the bottom of the transmission gear 27, the first rack 26 is in transmission cooperation with the second rack 28 through the transmission gear 27, one end of the second rack 28 extends to the two sides of the first sliding table 6 and is fixedly connected to the first sliding table 6, when the first sliding table 6 and the second sliding table 7 are in close abutment, the movable rods of the two second cylinders 9 are retracted, the second sliding table 7 is moved when the movable rods of the second cylinders 9 are retracted, the first rack 26 drives the transmission gear 27 to rotate when the second sliding table 7 moves, the second rack 28 and the first rack 26 on the two sides of the machine table 1 move in opposite directions when the transmission gear 27 rotates, and finally the first sliding table 6 and the second sliding table 7 are close to each other.

[0044] In further embodiments, the second sliding table 7 is fixedly provided with a first cylinder 702 on the two sides, the second sliding table 7 is fixedly provided with a linear guide rail 701 on the other two sides, the extension shaft 1502 and the linear guide rail 701 are slidably connected together, the movable rod of each first cylinder 702 is fixedly provided with a moving plate 16, and the extension shaft 1502 is rotatably connected to the two ends of the moving plate 16; a pair of semicircular guide rails 601 are fixedly installed in the first sliding table 6, a middle plate 603 is fixedly installed in the middle of each semicircular guide rail 601, and a first spring 602 is installed between the two sides of the middle plate 603 and the supporting cylinder 605. Because the production of each machine is different in the production line, the pipe diameter of different models also has some differences. If the pipe diameter is small, the camera 1302 cannot match the pipe path, which affects the data collection of the camera 1302 and reduces the collection points, so that the data is not accurate. In order to enable the camera 1302 to clearly shoot the edge of the pipe, when the pipe is small, the second cylinder 9 can be driven first, the connecting rod 1501 is inserted into the shaft of the butt gear 604, and the movable rod of the first cylinder 702 starts to extend. When the two moving plates 16 move towards each other, the two extension shafts 1502 at the two ends of the moving plate 16 move towards each other, so that the extension shaft 1502 moves on the linear guide rail 701. At the same time, the connecting rod 1501 drives the butt gear 604 to move towards each other synchronously, so that the plurality of driving rollers 15 move in parallel along the linear guide rail 701, so that the support point of the driving roller 15 on the edge of the pipe moves upwards, and the pipe can be lifted by a certain distance, so that the axis position of the pipe rises, the shaft of the adapter gear 13 and the pipe shaft are coaxial, and the camera 1302 can more easily capture the edge of the pipe, and the detection quality is improved.

[0045] It is worth mentioning that the material of the semi-arc guide rail 601 is made of soft rubber, and the driving roller 15 is at least three, each of which provides a pipe support point at the edge of the driving roller 15. When the extension shaft 1502 moves on the linear guide rail 701, the semi-arc guide rail 601 is supported by the supporting cylinder 605 to move, and the inner circle of the semi-arc guide rail 601 is deformed under pressure to generate a certain amount of deformation, so the interface gear 604 will also drive the adapter gear plate 13 to rise by a certain distance. Therefore, a certain redundant space needs to be maintained between the connecting pin 1202 and the fixed disc 1201 during design to prevent the fixed disc 1201 and the connecting pin 1202 from losing support connection directly, so that the adapter gear plate 13 falls off, as shown in FIGS. 3 and 11. Therefore, when the adapter gear plate 13 rises, the end of the fixed disc 1201 continues to be connected with the connecting pin 1202 in the redundant space. The fixed disc 1201 and the connecting pin 1202 still maintain connection, and the fixed disc 1201 can move the adapter gear plate 13. The number of connecting pins 1202 is at least three, which effectively hangs the fixed disc 1201. After the test is completed, the pipe should be immediately removed from the driving roller 15, and the first cylinder 702 moving rod can be reset.

[0046] Further, the first sliding table 6 and the second sliding table 7 have a tray structure extending towards the edge of the machine table 1 on one side, and a motor 10 is fixedly installed on one side of the tray of the second sliding table 7. The output shaft of the motor 10 is sleeved with a driving disc 32, and the other ends of the two extension shafts 1502 are respectively sleeved with a first rotating disc 14 and a second rotating disc 29. The driving disc 32, the first rotating disc 14 and the second rotating disc 29 are connected together through a belt. A pair of limiting seats 30 are fixedly installed on the other side of the tray of the second sliding table 7. A pressing roller 31 is slidably connected to each limiting seat 30. The pressing roller 31 and the outer circle of the belt are in contact. After the pipe is placed on the driving roller 15, the terminal of the background starts to rotate the motor 10. The rotation of the motor 10 drives the rotation of the driving disc 32. The rotation of the driving disc 32 drives the synchronous and same-direction rotation of the first rotating disc 14 and the second rotating disc 29, so that each extension shaft 1502 drives the rotation of the driving roller 15. In order to enable the transmission between the belt and the first rotating disc 14 and the second rotating disc 29, the pressing roller 31 presses the belt according to its own gravity to prevent the transmission of the belt from failing, and provides sufficient power for the first rotating disc 14 and the second rotating disc 29.

[0047] Further, the first sliding table 6 top two sides are fixedly installed with sliding rheostat 24, the bottom of each sliding rheostat 24 is fixedly connected with second spring 25, one end of the second spring 25 is fixedly installed with rheostat block 23, two moving plates 16 opposite ends are fixedly installed with variable resistor rod 22, the variable resistor rod 22 and rheostat block 23 are slidably connected, when two extension shafts 1502 relatively move, the variable resistor rod 22 extrudes the second spring 25 to make the rheostat block 23 slide at the bottom of the sliding rheostat 24, the sliding rheostat 24 and electromagnet 1303 are electrically connected through wires, when the connecting rod 1501 and the butt joint gear 604 butt joint, the variable resistor rod 22 and the rheostat block 23 contact, if it is needed to change the distance between the two driving rollers 15 to support different pipes, the first air cylinder 702 drives the moving plate 16 to move in the process of synchronous belt variable resistor rod 22 compression or makes the second spring 25 reset, further makes the rheostat block 23 slide at the bottom of the sliding rheostat 24, makes the magnetism of electromagnet 1303 change, when the pipe port is small, two moving plates 16 need to move towards each other, therefore the rheostat block 23 moves towards the edge of the adapter gear disc 13, the resistance of the sliding rheostat 24 becomes smaller, the magnetism of electromagnet 1303 becomes stronger, the electromagnet 1303 absorbs the camera 1302, the motion radius of two cameras 1302 becomes smaller, it is easier to shoot the pipe edge, improves the adaptability of the device.

[0048] Further, the two ends of each moving plate 16 extend downward and abut against the machine table 1 respectively, one end of the moving plate 16 is fixedly connected with a front guide rod 17, one end of each front guide rod 17 is fixedly installed with a support top 18, the other end of the moving plate 16 is fixedly installed with a rear guide rod 19, one end of the rear guide rod 19 has an upwardly extending edge with an arc, each edge side is respectively installed with a height limiting rod 20, the height limiting rod 20 and the support top 18 can effectively prevent the pipe from tilting when rolling, and increase the stability of the pipe when rotating.

[0049] Further, the first sliding table 6 top middle part is suspended with an extension pipe 33, the extension pipe 33 is internally provided with a retention cavity 35, a plurality of ultrasonic probes 34 radially movable along the extension pipe 33 are arranged on the extension pipe 33, the bottom of each ultrasonic probe 34 is communicated with the inside of the extension pipe 33, a plurality of extrusion holes 36 are arranged on the outer ring of the extension pipe 33, an auxiliary liquid cylinder 37 is fixedly installed on one side of the tray of the first sliding table 6, a hydraulic pump 38 is fixedly installed on the other side of the tray of the first sliding table 6, the extrusion holes 36 are communicated with the auxiliary liquid cylinder 37 through the retention cavity 35, a plurality of light supplement lamps 1301 are installed on one side of the adapter gear disc 13 close to the shaft center, the light supplement lamps 1301 can effectively reduce the shadow generated by the camera 1302 inside the pipe, when the pipe diameter is discontinuous or appears fission, the above embodiment cannot detect, therefore, in this embodiment, when the first sliding table 6 and the second sliding table 7 are close, the extension pipe 33 is located inside the pipe, when the pipe rotates, the hydraulic pump 38 works together with the camera 1302, the hydraulic pump 38 drives the hydraulic oil inside the extension pipe 33 to work, the hydraulic oil takes the inside of the extension pipe 33 as a flow channel, drives each ultrasonic probe 34 to stretch out, at the same time, the auxiliary liquid cylinder 37 is filled with coupling agent, sprays to the inner wall of the pipe, in the process of pipe rotation, multi-point ultrasonic positioning is carried out on the inner wall of the pipe, after screening the collected data, accurate values are obtained, in the operation, the second cylinder 9 movable rod can be driven again to retract, so that the distance between the pipe and the first sliding table 6 and the second sliding table 7 becomes smaller, in this way, in the process of pipe rotation, the path swept by the ultrasonic probe 34 presents a spiral shape in the pipe, the detection range is improved, and the adaptability of the device is stronger.

[0050] The bottom of the machine table 1 is fixedly installed with a control cabinet 2, a sensing unit is arranged in the control cabinet 2, and legs 3 are fixedly installed around the bottom of the machine table 1, and a roller 4 that can be extended and adjusted is arranged on each leg 3.

[0051] The device contained in the control cabinet 2 is an information acquisition module, a connection support module and a control analysis module, when starting automatic work, the control analysis module sends a walking information requirement signal to the navigation positioning device of the connection support module according to the positions of each production line, the navigation positioning device sends a running instruction to the driver after receiving the signal, the driver drives the roller 4 to drive the connection support module to walk to the specified position, the information acquisition module on the connection support module acquires high-definition pictures and transmits them to the control analysis module, and the control analysis module performs rapid measurement of the specifications and sizes and numerical output.

[0052] When all the pipes of the production line have been tested, the device can be reset by the navigation positioning device. The reset can be calculated according to the formula (ΔLO, ΔLA) = M0-M1 = (ΔLO1, ΔLA0)-(ΔLO1, ΔLA1). In the formula, (ΔLO1, ΔLA0) and (ΔLO1, ΔLA1) are the longitude and latitude of the target position M0 and the starting position M1.

[0053] The method comprises the following steps:

[0054] a. Preparation stage:

[0055] The image preprocessing process converts the transmitted color image into a gray image, removes noise in the image, enhances the contrast and clarity of the image, identifies the edges in the image, binarizes the image, and prepares the camera 1302 for standby;

[0056] b. Production line positioning:

[0057] For the first time, the edge of the machine 1 and the terminal of the production line are preliminarily calibrated by artificial close, so that the axis of the adapter gear disc 13 is located between the two drive rollers 15. When the pipe is being blanked in the production line, the two drive rollers 15 support the edge of the pipe, the camera 1302 repeatedly shoots the front, confirms two points of the edge of the pipe, takes the middle value of the two points, the camera 1302 transmits the value to the display 5, establishes a coordinate system, if the axis of the pipe and the axis of the adapter gear disc 13 are in the same vertical plane, the positioning is successful, if the middle value is located in a certain quadrant of the coordinate system, the control cabinet 2 drives the roller 4 to descend, one side of the roller 4 is controlled to rotate by the driver (existing structure, not shown), and the accurate position of the machine 1 is adjusted again by the driver;

[0058] c. Test stage:

[0059] First, turn on the fill light 1301 to light the inside of the pipe. After the two drive rollers 15 contact the pipe, the two second air cylinders 9 synchronously retract the movable rod, the first rack 26 drives the transmission gear 27 to rotate, the transmission gear 27 drives the second rack 28 to walk on the machine 1, so that the first sliding table 6 and the second sliding table 7 approach each other, the connecting rod 1501 and the mating gear 604 are mated, the control cabinet 2 controls the motor 10 to rotate, the motor 10 drives the first rotating disc 14 and the second rotating disc 29 to rotate, the connecting rod 1501 drives the mating gear 604 to rotate, and finally the mating gear 604 drives the adapter gear disc 13 to rotate, so that the rotating path of the camera 1302 and the rotating path of the pipe are opposite. Then the camera 1302 creates a circular parameter, determines the center and radius of the pipe to be detected by traversing the possible center position and radius combination of each edge point, and adopts multi-point shooting on the inner and outer diameter edges of the pipe to quickly obtain multiple sets of data with high accuracy. The rotation of the pipe can detect the out-of-roundness of multiple regions thereof.

[0060] d. The inner diameter slope point difference detection:

[0061] When the extension pipe 33 is located inside the pipe, the hydraulic pump 38 and the auxiliary liquid cylinder 37 are simultaneously opened, so that the hydraulic oil is generated inside the extension pipe 33, the hydraulic oil makes each ultrasonic probe 34 radially extend along the extension pipe 33, and the coupling liquid filled in the auxiliary liquid cylinder 37 is extruded into the retention cavity 35 through the extrusion hole 36 and then extruded into the pipe, after the ultrasonic probe 34 is opened, the ultrasonic wave is generated and shot to the inner wall of the pipe, the displayed value is compared on the display 5, and the size of the inner diameter of the pipe or whether the pipe has the crack deformation phenomenon is determined.

[0062] e. Line repositioning:

[0063] After one of the lines is tested, the pipe is timely removed, the control cabinet 2 controls the roller 4 to descend, the driver drives the roller 4 to rotate, aligns the other end of the machine table 1 along the path set by the control cabinet 2, then the control cabinet 2 controls the roller 4 to ascend, the supporting leg 3 is grounded, and whether the position of the machine table 1 and the line is aligned is confirmed again, if not, the step b is recycled.

[0064] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for on-site rapid testing of the size of plastic pipe, comprising a machine table (1), characterized in that, The machine table (1) is provided with a pair of slide rails (8) on both sides of the top, a first sliding table (6) and a second sliding table (7) are respectively connected between the two slide rails (8), a plurality of drive rollers (15) are rotatably connected to the inner sides of the second sliding table (7), the drive rollers (15) are arranged in parallel on the same side of the second sliding table (7), the shafts of the drive rollers (15) on the same side of the second sliding table (7) are penetrated and fixedly installed with an extension shaft (1502), one end of the extension shaft (1502) is fixedly installed with a connecting rod (1501), a support seat (11) is fixedly installed on the first sliding table (6), a fixed clamp (12) is fixedly installed on the top of the support seat (11), a fixed disc (1201) is rotatably connected to one side of the fixed clamp (12), an adapter gear disc (13) is fixedly installed on one side of the fixed disc (1201), a plurality of connecting pins (1202) are fixedly connected between the fixed clamp (12) and the fixed disc (1201), a pair of cameras (1302) are slidably installed on one side of the adapter gear disc (13) facing the second sliding table (7), a pair of support cylinders (605) are slidably connected to the first sliding table (6), a pair of docking gears (604) are rotatably connected to the common end of the support cylinders (605), the adapter gear disc (13) and the two docking gears (604) are rollingly connected, and the connecting rod (1501) and the docking gears (604) are inserted and installed together; The two drive rollers (15) rotate in the same direction, and after the connecting rod (1501) and the docking gears (604) are docked, the two drive rollers (15) and the adapter gear disc (13) roll in opposite directions; The machine table (1) is provided with a second air cylinder (9) near each slide rail (8), one end of the movable rod of each second air cylinder (9) is fixedly installed on the second sliding table (7), first racks (26) are fixedly installed on both sides of the second sliding table (7), a transmission gear (27) is arranged near each slide rail (8) of the machine table (1), a second rack (28) is slidably connected to the bottom of the transmission gear (27), the first rack (26) is in driving cooperation with the second rack (28) through the transmission gear (27), and one end of the second rack (28) extends to both sides of the first sliding table (6) and is fixedly installed on the first sliding table (6). The first sliding table (6) top middle part is suspended with an extension pipe (33), the extension pipe (33) is internally provided with a retention cavity (35), a plurality of ultrasonic probes (34) radially moving along the extension pipe (33) are arranged on the extension pipe (33), the bottom of each ultrasonic probe (34) is communicated with the inside of the extension pipe (33), a plurality of extrusion holes (36) are arranged on the outer ring of the extension pipe (33), the tray of the first sliding table (6) is fixedly provided with an auxiliary liquid cylinder (37) on one side, the tray of the first sliding table (6) is fixedly provided with a hydraulic pump (38) on the other side, the extrusion holes (36) are communicated with the auxiliary liquid cylinder (37) through the retention cavity (35), a plurality of light supplementing lamps (1301) are arranged on one side of the adapter gear disc (13) near the shaft center. The machine table (1) is fixedly provided with a control cabinet (2) at the bottom, a sensing unit is arranged in the control cabinet (2), supporting legs (3) are fixedly arranged around the bottom of the machine table (1), and the supporting legs (3) are provided with telescopic adjusting rollers (4); The second sliding table (7) is fixedly provided with first air cylinders (702) on both sides, linear guide rails (701) are fixedly arranged on the other two sides of the second sliding table (7), the extension shafts (1502) and the linear guide rails (701) are slidably connected together, and the movable rods of the first air cylinders (702) are respectively fixedly provided with moving plates (16); The first sliding table (6) is fixedly provided with a pair of semicircular guide rails (601), and the middle parts of the semicircular guide rails (601) are fixedly provided with middle plates (603); first springs (602) are arranged between the middle plates (603) and the supporting cylinders (605) on both sides. The first sliding table (6) and the second sliding table (7) are provided with tray structures extending towards the edges of the machine table (1) on one side, a motor (10) is fixedly arranged on one side of the tray of the second sliding table (7), a driving disc (32) is arranged on the output shaft of the motor (10), a first rotating disc (14) and a second rotating disc (29) are respectively arranged on the other ends of the two extension shafts (1502), the driving disc (32), the first rotating disc (14) and the second rotating disc (29) are connected together through a belt, a pair of limiting seats (30) are fixedly arranged on the other side of the tray of the second sliding table (7), and a pressure roller (31) is slidably arranged on each limiting seat (30); and the pressure roller (31) is in contact with the outer ring of the belt.

2. A device for on-site rapid testing of the dimensions of plastic pipes according to claim 1, characterized in that, The semicircular guide rails (601) are made of soft rubber, and the driving rollers (15) are at least three, and each driving roller (15) provides a pipe support point at the edge.

3. The device for on-site rapid testing of the size of plastic pipe according to claim 1, characterized in that, The first sliding platform (6) top two sides are fixedly installed with sliding rheostats (24), the bottom of each sliding rheostat (24) is fixedly connected with a second spring (25), one end of the second spring (25) is fixedly installed with a rheostat block (23), the opposite end of the two moving plates (16) is fixedly installed with a variable resistor rod (22), the variable resistor rod (22) and the rheostat block (23) are slidably connected, when the two extension shafts (1502) relatively move, the variable resistor rod (22) extrudes the second spring (25) to make the rheostat block (23) slide at the bottom of the sliding rheostat (24), the sliding rheostat (24) and the electromagnet (1303) are electrically connected through wires.

4. A device for on-site rapid testing of the dimensions of plastic pipes according to claim 3, characterized in that, Each moving plate (16) extends downward at both ends and abuts against the machine table (1), one end of the moving plate (16) is fixedly connected with a front guide rod (17), one end of each front guide rod (17) is fixedly installed with a support top seat (18), the other end of the moving plate (16) is fixedly installed with a rear guide rod (19), the rear guide rod (19) has an upwardly extending edge with an arc at one end, and each edge side is respectively provided with a height limiting rod (20).

5. The method for use in the operation of the device for on-site rapid testing of the dimensions of plastic pipe elements according to any one of claims 1-4, characterized in that, The method comprises the following steps: a. Preparation stage: The image preprocessing process converts the color image transmitted by the camera (1302) into a gray image, removes noise in the image, enhances the contrast and clarity of the image, identifies the edges in the image, binarizes the image, and the camera (1302) is ready for standby; b. Production line positioning: For the first time, the edge of the machine table (1) is preliminarily calibrated by artificial close to the terminal of the production line, so that the axis of the adapter gear disc (13) is located between the two drive rollers (15), when the pipe is being blanked in the production line, the two drive rollers (15) support the pipe edge, the camera (1302) repeatedly shoots the front, confirms two points of the pipe edge, takes the middle value of the two points, the camera (1302) transmits the value to the display (5), establishes a coordinate system, if the pipe axis and the adapter gear disc (13) axis are in the same vertical plane, the positioning is successful, if the middle value is in a certain quadrant of the coordinate system, the control cabinet (2) drives the roller (4) to descend, one side of the roller (4) is controlled to rotate by the driver, and the accurate position of the machine table (1) is adjusted again by the driver; c. Test stage: First turn on the light (1301) to fill the pipe inside the light, two drive roll (15) and pipe contact after two second cylinder (9) synchronous retraction activity rod, the first rack (26) drive gear (27) rotation, drive gear (27) drive second rack (28) on the machine (1) walking, so that the first slide (6) and the second slide (7) two each other, connecting rod (1501) and the interface gear (604) interface, control cabinet (2) control motor (10) rotation, motor (10) drive first turntable (14) and second turntable (29) rotation, connecting rod (1501) drive interface gear (604) rotation, finally interface gear (604) drive adapter gear (13) rotation, so that the camera (1302) rotation path and the rotation path of the pipe is opposite, then the camera (1302) create a circular parameter, for each edge point traversal possible center position and radius combination, determine the center and radius of the pipe to be detected, the inner diameter and outer diameter edge of the pipe to take multiple point shooting, quickly get a plurality of groups of data, with accuracy, pipe rotation can be detected in several areas of the non-circularity; d. Inner diameter slope point difference detection: When the extension pipe (33) is located inside the pipe, the hydraulic pump (38) and the auxiliary liquid cylinder (37) are opened at the same time, so that the hydraulic oil is generated inside the extension pipe (33), and each ultrasonic probe (34) is stretched radially along the extension pipe (33), while the coupling liquid filled in the auxiliary liquid cylinder (37) is extruded into the pipe inside through the extrusion hole (36) after being output by the hydraulic pump (38) and extruded into the pipe inside, the ultrasonic probe (34) is opened to generate ultrasonic waves to the pipe inner wall, and the displayed value is compared on the display (5) to determine the size of the pipe inside or whether the fission deformation phenomenon occurs; e. Line repositioning: When one of the production lines is tested, the pipe is timely removed, the control cabinet (2) controls the roller (4) to descend, the drive roller (4) rotates along the path set by the control cabinet (2), aligns the other end of the machine (1) of the production line, and then the control cabinet (2) controls the roller (4) to rise, the supporting leg (3) is grounded, and the position of the machine (1) and the production line is confirmed again. If not aligned, then repeat step b.

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