Online automatic measuring device for pipe diameter

Abstract

The utility model relates to the technical field of pipe body detection, in particular to a pipe diameter on-line automatic measuring device, which comprises a pipe outlet track, a detected pipe body is conveyed on the surface of the pipe outlet track, an encoder mounting seat is arranged on one side of the detected pipe body, an encoder dust cover is fixedly arranged on the top of the encoder mounting seat, and an encoder is arranged on the encoder dust cover. An encoder dustproof cover is arranged on the base, a rotation angle measuring encoder is fixedly arranged in the encoder dustproof cover, a coupler with a support is fixedly arranged at one end of the rotation angle measuring encoder, a heat insulation rod is arranged on one side of the coupler, and a transverse rotating rod is arranged on one side of the heat insulation rod. The device is simple in structure, is not affected by the brightness of a measured object and ambient light, is also less affected by environmental dust, is simple in collected data processing process, can be completed by a low-cost processor, is high in measurement result accuracy, and facilitates the automation and informatization of production management.

Description

Technical Field

[0001] This utility model relates to an online automatic pipe diameter measurement device, belonging to the field of pipe body inspection technology. Background Technology

[0002] Due to limitations in the production process, pipes with substandard inner and outer diameters still exist. In order to screen out qualified pipes and strictly monitor the production quality of pipes, it is necessary to test the inner diameter, outer diameter, and out-of-roundness of the pipe body and pipe ends.

[0003] Currently, manual recording methods involve frequent counting, increasing labor intensity, and are prone to omissions, miscounts, and human errors. Furthermore, paper records are not convenient for information-based statistical processing. Using industrial cameras for binocular vision recognition is costly, and the brightness of the photographs is affected by the brightness of the measured object and the ambient light level; both dark and bright conditions increase the difficulty of accurate recognition. Additionally, camera lenses are affected by environmental dust and require frequent cleaning. Laser width measurement is also costly, and when used on high-temperature measured objects, the laser measuring device is easily damaged by heat radiation, increasing maintenance and usage costs and bringing certain adverse effects to practical use. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide an online automatic pipe diameter measurement device. This invention has a simple structure, low cost, and convenient construction and installation. It adopts a mechanical rotation method for measurement, which is not affected by the brightness of the measured object itself or the ambient light, and is also less affected by environmental dust. Moreover, the data acquisition and processing process is simple and can be completed by a low-cost processor. The measurement results given by this device are highly accurate, which is conducive to the automation and informatization of production management, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An online automatic pipe diameter measurement device includes a pipe exit track, on the surface of which a pipe body to be measured is conveyed. An encoder mounting base is placed on one side of the pipe body, and an encoder dust cover is fixedly installed on the top of the encoder mounting base. An angle measuring encoder is fixedly installed inside the encoder dust cover. A coupling with a bracket is fixedly installed at one end of the angle measuring encoder. A heat insulation rod is placed on one side of the coupling, and a transverse rotating rod is placed on one side of the heat insulation rod. One end of the heat insulation rod is connected to one end of the transverse rotating rod. Both ends of the transverse rotating rod are rotatably connected to rotating rod bearings. Connecting sleeves are connected between the two ends of the heat insulation rod and the rotating rod bearings and the coupling, respectively. A vertical swing rod is fixedly connected to the bottom of the transverse rotating rod, and a swing head roller is fixedly installed at one end of the vertical swing rod.

[0007] Furthermore, the vertical swing arm is connected to the bottom of one end of the horizontal rotating rod, and an oblique tie rod is connected between the surface of the vertical swing arm and the surface of the horizontal rotating rod.

[0008] Furthermore, the circumferential surface of the encoder dust cover completely covers the top of the encoder mounting base, and the encoder dust cover and the encoder mounting base are connected by screws.

[0009] Furthermore, the oscillating roller is located on one side of the tube being tested, and the surface of the oscillating roller abuts against the surface of the tube being tested.

[0010] Furthermore, the vertical swing rod, the swing head roller, the transverse rotating rod, the rotating rod bearing, and the connecting sleeve are all made of heat-resistant metal, and the surfaces of the vertical swing rod, the swing head roller, the transverse rotating rod, the rotating rod bearing, and the connecting sleeve are coated with a wear-resistant coating.

[0011] Furthermore, the lateral rotating rod, the heat insulation rod, and the angle measuring encoder are located on the same horizontal line, and are interconnected with each other.

[0012] The beneficial effects of this utility model are:

[0013] 1. In this utility model, the automatic pipe diameter measuring device uses a mechanical measuring rod to contact the measured body. The measuring rod drives a rotating rod, which is connected to an angle measuring encoder. The angle measuring encoder synchronously measures the deflection angle of the vertical swing rod. When the swing head roller rolls to its highest point along the surface of the measured pipe, the deflection angle of the vertical swing rod is at its maximum. After that, the swing head roller rolls down along the surface of the measured pipe, and the deflection angle value of the vertical swing rod measured by the angle measuring encoder gradually decreases until the vertical swing rod completely falls off the surface of the measured pipe. The maximum value of the vertical swing rod deflection angle measured by the angle measuring encoder is calculated by the data acquisition processor to obtain the height of the vertical swing rod head from the upper end face of the pipe exit track, which is the diameter data of the measured pipe.

[0014] 2. In this utility model, the measuring rod head on the vertical swing rod has a roller, which forms a rolling contact with the measured object, reducing frictional damage between them. For high-temperature measured objects, a heat-insulating rod made of a material that is both heat-resistant and heat-insulating is added between the metal rotating rod and the angle measuring encoder, enabling long-term automatic measurement of high-temperature objects. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the specific embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof.

[0016] Figure 1This is a schematic diagram of the overall structure of an online automatic pipe diameter measuring device according to this utility model;

[0017] Figure 2 This is an internal half-section of the encoder dust cover in an online automatic pipe diameter measuring device of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the oscillating roller in an online automatic pipe diameter measuring device of this utility model;

[0019] Figure 4 This is a simulation diagram of the pipe diameter measurement formula for an online automatic pipe diameter measurement device according to this utility model;

[0020] The following are the labels in the diagram: 1. Outlet tube track; 2. Test tube body; 3. Encoder mounting base; 4. Encoder dust cover; 5. Angle measuring encoder; 6. Coupling; 7. Heat insulation rod; 8. Horizontal rotating rod; 9. Rotating rod bearing; 10. Connecting sleeve; 11. Vertical swing rod; 12. Swing head roller; 13. Diagonal tie rod. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please refer to Example 1 Figure 1 The device includes an output tube track 1, on the surface of which a test tube 2 is fed. An encoder mounting base 3 is placed on one side of the test tube 2. An encoder dust cover 4 is fixedly installed on the top of the encoder mounting base 3. An angle measuring encoder 5 is fixedly installed inside the encoder dust cover 4. A coupling 6 with a bracket is fixedly installed at one end of the angle measuring encoder 5. A heat insulation rod 7 is placed on one side of the coupling 6. A transverse rotating rod 8 is placed on one side of the heat insulation rod 7, and one end of the heat insulation rod 7 is connected to one end of the transverse rotating rod 8. Rotary rod bearings 9 are rotatably connected to both ends of the transverse rotating rod 8. Connecting sleeves 10 are connected between the two ends of the heat insulation rod 7 and the rotating rod bearings 9 and the coupling 6, respectively. A vertical swing rod 11 is fixedly connected to the bottom of the transverse rotating rod 8. A swing head roller 12 is fixedly installed at one end of the vertical swing rod 11.

[0023] Specifically, such as Figures 1-4As shown, the vertical swing arm 11 is connected to the bottom of one end of the transverse rotating rod 8, and a diagonal tie rod 13 is connected between the surface of the vertical swing arm 11 and the surface of the transverse rotating rod 8 to enhance the connection between the vertical swing arm 11 and the transverse rotating rod 8 and resist lateral pressure. The circumferential surface of the encoder dust cover 4 completely covers the top of the encoder mounting base 3, and the encoder dust cover 4 and the encoder mounting base 3 are connected by screws. The convenient disassembly and assembly of the encoder dust cover 4 helps protect the structure on the encoder mounting base 3.

[0024] Specifically, such as Figures 1-4 As shown, the sway roller 12 is located on one side of the tube body 2 being tested, and the surface of the sway roller 12 abuts against the surface of the tube body 2 being tested. The sway roller 12 can closely adhere to the tube body 2 being tested and deflect the vertical sway rod 11, thereby driving the horizontal rotating rod 8 to rotate. The horizontal rotating rod 8 is connected to the rotating shaft of the angle measuring encoder 5, and the angle measuring encoder 5 will synchronously measure the deflection angle value of the vertical sway rod 11.

[0025] Please refer to Example 2 Figures 1-4 The difference between this embodiment and Embodiment 1 is that the vertical swing arm 11, the swing head roller 12, the transverse rotating rod 8, the rotating rod bearing 9, and the connecting sleeve 10 are all made of heat-resistant metal, and the surfaces of the vertical swing arm 11, the swing head roller 12, the transverse rotating rod 8, the rotating rod bearing 9, and the connecting sleeve 10 are coated with a wear-resistant coating. The transverse rotating rod 8, the heat-insulating rod 7, and the angle measuring encoder 5 are located on the same horizontal line, and the transverse rotating rod 8, the heat-insulating rod 7, and the angle measuring encoder 5 are interconnected. For high-temperature objects, by adding a heat-insulating rod made of a material that is both heat-resistant and heat-insulating between the vertical swing arm 11, the swing head roller 12, the transverse rotating rod 8, the rotating rod bearing 9, the connecting sleeve 10, and the angle measuring encoder 5, long-term automatic measurement applications for high-temperature objects can be achieved.

[0026] The working principle of this utility model is as follows: During use, when the pipe body 2 being tested moves along the outlet track 1, it pushes the swaying roller 12 to deflect the vertical sway bar 11, thereby causing the horizontal rotating rod 8 to rotate. The horizontal rotating rod 8 is connected to the rotating shaft of the angle measuring encoder 5, which simultaneously measures the deflection angle of the vertical sway bar 11. When the swaying roller 12 rolls to its highest point while still touching the surface of the pipe body 2 being tested, the deflection angle of the vertical sway bar 11 is at its maximum. After this point, the swaying roller 12 continues to move while still touching the surface of the pipe body 2 being tested. As the tube body 2 rolls off the surface, the deflection angle of the vertical swing rod 11 measured by the angle measuring encoder 5 gradually decreases until the vertical swing rod 11 completely falls off the surface of the tube body 2. The maximum value of the deflection angle of the vertical swing rod 11 measured by the angle measuring encoder 5, after being processed by the data acquisition processor, will yield the height of the swing head of the vertical swing rod 11 from the upper end face of the tube exit track 1, which is also the diameter data of the tube body 2 being measured. The calculation process based on the reference data is proposed, and its detailed geometric principles are as described in this utility model. Figure 3As shown, the vertical swing arm 11 has a length of 1, and the horizontal bar pivot is at a height H above the upper end of the tube track 1. When the tube being tested 2 moves forward on the track, it will cause the vertical arm to deflect around the horizontal bar pivot. When the swing head reaches the highest point of the tube being tested 2, the swing arm deflects at an angle of θ. The height of the swing head from the pivot is h = lCOSθ. The diameter of the tube being tested 2 can be calculated as D = Hh = H - lCOSθ. Therefore, by reading the angle value of the angle measuring encoder 5 when the swing head is raised to the highest point, the outer diameter of the tube being tested 2 can be calculated, thereby determining the specifications of the tube being tested 2. It can be seen that the measurement results given by this device are highly accurate, which is beneficial to the automation and informatization of production management.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online automatic pipe diameter measuring device, comprising a pipe outlet track (1), wherein a pipe body (2) to be measured is transmitted on the surface of the pipe outlet track (1), and an encoder mounting base (3) is placed and installed on one side of the pipe body (2), characterized in that: An encoder dust cover (4) is fixedly installed on the top of the encoder mounting base (3). An angle measuring encoder (5) is fixedly installed inside the encoder dust cover (4). A coupling (6) with a bracket is fixedly installed at one end of the angle measuring encoder (5). A heat insulation rod (7) is placed on one side of the coupling (6). A transverse rotating rod (8) is placed on one side of the heat insulation rod (7). One end of the heat insulation rod (7) is connected to one end of the transverse rotating rod (8). Both ends of the transverse rotating rod (8) are rotatably connected to rotating rod bearings (9). Both ends of the heat insulation rod (7) are connected to the rotating rod bearings (9) and the coupling (6) respectively by connecting sleeves (10). A vertical swing rod (11) is fixedly connected to the bottom of the transverse rotating rod (8). A swing head roller (12) is fixedly installed at one end of the vertical swing rod (11).

2. The device according to claim 1, characterized in that: The vertical swing arm (11) is connected to the bottom of one end of the horizontal rotating rod (8), and a diagonal tie rod (13) is connected between the surface of the vertical swing arm (11) and the surface of the horizontal rotating rod (8).

3. The device according to claim 1, characterized in that: The circumferential surface of the encoder dust cover (4) completely covers the top of the encoder mounting base (3), and the encoder dust cover (4) and the encoder mounting base (3) are connected by a screw.

4. The device according to claim 1, characterized in that: The oscillating roller (12) is located on one side of the tube body (2) being tested, and the surface of the oscillating roller (12) abuts against the surface of the tube body (2) being tested.

5. The device according to claim 1, characterized in that: The vertical swing rod (11), the swing head roller (12), the transverse rotating rod (8), the rotating rod bearing (9), and the connecting sleeve (10) are all made of heat-resistant metal material, and the surfaces of the vertical swing rod (11), the swing head roller (12), the transverse rotating rod (8), the rotating rod bearing (9), and the connecting sleeve (10) are coated with a wear-resistant coating.

6. The device according to claim 1, characterized in that: The transverse rotating rod (8), the heat insulation rod (7), and the angle measuring encoder (5) are located on the same horizontal line, and the transverse rotating rod (8), the heat insulation rod (7), and the angle measuring encoder (5) are interconnected.

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