Pipe fitting coaxiality detection device

Abstract

The utility model relates to a pipe fitting coaxiality detection device. The pipe fitting coaxiality detection device comprises a first detection mechanism and a second detection mechanism which have the same structure and are symmetrically arranged, each of the first detection mechanism and the second detection mechanism comprises a first linear module, a camera and a light source which are connected with a moving part of the first linear module, a second linear module parallel to the first linear module, and a pneumatic chuck connected with a moving part of the second linear module; the pneumatic chuck is connected with the output end of the rotating motor; wherein the pneumatic chuck is arranged to clamp the end part of the pipe fitting and rotate the pipe fitting; the camera and the light source are arranged above and below the pipe fitting respectively, and the camera is arranged to shoot the pipe fitting. According to the utility model, the detection action of pipe fitting products is simplified, the detection efficiency is improved, and the detection operation is not stopped.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a pipe coaxiality detection device. Background Art

[0002] At present, the main methods for realizing surface defect detection of pipes at home and abroad are as follows:

[0003] 1. Telescope method: This is the most basic measurement method. The principle is to use a telescope to observe the deviation between the two ends of the steel pipe, thereby indirectly measuring the coaxiality of the steel pipe. In specific operation, install the telescope on one side of the center line of the steel pipe, and observe the two ends of the steel pipe through the telescope, and record the distance difference between the two ends and the center point of the telescope. Then install the telescope on the other side and make the same measurement. Calculate the coaxiality of the steel pipe based on the two measurement results. This method is simple to operate, but it requires high vision and accuracy of the surveyor.

[0004] 2. Wire method: This is a more accurate measurement method. The principle is to install two sets of wires pointing in the same direction at the end of the steel pipe, and then fix the wires in the same plane. By measuring the wire spacing and the distance difference between the wires and the steel pipe, the deviation between the two ends of the steel pipe is calculated. This method has high accuracy, but it has high requirements for the fixation of the wires and the plane adjustment.

[0005] 3. Line rod method: This is a more commonly used measurement method. Its principle is to measure the deviation between the two ends of the steel pipe through two straight rods fixed at both ends of the steel pipe. In the specific operation, first set symmetrical marking lines on the rod, then fix the rod at both ends of the steel pipe, and adjust the position of the straight rod so that it coincides with the marking line. Then use a tool to measure the height difference between the two straight rods and calculate the deviation between the two ends of the steel pipe. This method is simple to operate, but it requires the accuracy of fixing the rod and adjusting the symmetrical marking line.

[0006] In summary, the above methods all have the problem of not being fast and requiring the measurement personnel to have a high level of proficiency in order to measure accurately. Utility Model Content

[0007] Aiming at the deficiencies of the prior art, the utility model discloses a pipe coaxiality detection device.

[0008] The technical solution adopted by the utility model is as follows:

[0009] A pipe coaxiality detection device comprises a first detection mechanism and a second detection mechanism having the same structure and being symmetrically arranged;

[0010] The first detection mechanism and the second detection mechanism each include a first linear module, a camera and a light source connected to a moving part of the first linear module, a second linear module arranged in parallel with the first linear module, and a pneumatic chuck connected to the moving part of the second linear module; the pneumatic chuck is connected to an output end of a rotating motor;

[0011] Wherein, the pneumatic chuck is configured to clamp the end of the pipe and rotate the pipe; the camera and the light source are respectively arranged above and below the pipe, and the camera is configured to take a photo of the pipe.

[0012] In one embodiment of the present invention, the first detection mechanism and the second detection mechanism further include at least one lifting module, the lifting module is connected to the moving part of the first linear module, and the movable part of the lifting module is connected to the camera.

[0013] In one embodiment of the utility model, the lifting module includes a first lifting module and a second lifting module, wherein the moving part of the first linear module is connected to the fixed part of the first lifting module, the movable part of the first lifting module is connected to the fixed part of the second lifting module, and the movable part of the second lifting module is connected to the camera.

[0014] In one embodiment of the utility model, the moving part of the first linear module is connected to the first slide, and one side of the main body of the first lifting module is fixedly connected to the first slide; the other side of the main body of the first lifting module is fixedly connected to the second slide, and one side of the main body of the second lifting module is fixedly connected to the second slide.

[0015] In one embodiment of the present invention, a first guide module is provided between the first slide and the second slide, and the first guide module is configured to guide the moving direction of the second slide.

[0016] In one embodiment of the present invention, the first lifting module is a single-acting cylinder.

[0017] In one embodiment of the present invention, the second lifting module is a slide cylinder with a guide rail.

[0018] In one embodiment of the present invention, the camera is a black and white camera.

[0019] In one embodiment of the present invention, the light source is a telecentric backlight source.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The pipe coaxiality detection device described in the utility model fixes the pipe by a pneumatic chuck and rotates it for one circle, and can realize the coaxiality detection of the pipe by taking photos multiple times, thereby simplifying the detection action of pipe products, completing the detection in a shorter time, improving the detection efficiency, and realizing non-stop detection of product production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0023] Figure 1 It is a front view of the pipe coaxiality detection device of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the first viewing angle of the first detection mechanism or the second detection mechanism in the utility model.

[0025] Figure 3 It is a structural schematic diagram of the second viewing angle of the first detection mechanism or the second detection mechanism in the utility model.

[0026] Figure 4 It is a first partial structural schematic diagram of the first detection mechanism or the second detection mechanism in the utility model.

[0027] Figure 5 It is a first partial side view of the first detection mechanism or the second detection mechanism in the utility model.

[0028] Figure 6 It is a side view of the second linear module and the pneumatic chuck in the utility model.

[0029] Explanation of the reference numerals in the specification: 10. First detection mechanism; 20. Second detection mechanism; 30. Pipe; 40. Camera; 50. Light source; 60. First linear module; 70. Second linear module; 80. Pneumatic chuck; 901. First lifting module; 902. Second lifting module; 903. First slide; 904. Second slide; 905. First guide module; 906. Second guide module; 907. Mounting seat; 908. Bracket; 909. Reinforcement plate. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0031] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0032] The applicant has found that the existing methods for detecting the coaxiality of pipe fittings are not fast and require the measurement personnel to have high proficiency in order to measure accurately.

[0033] In order to solve the above problem, this embodiment provides a pipe coaxiality detection device.

[0034] Combination Figures 1 to 3 as well as Figure 6 , a pipe coaxiality detection device, comprising a first detection mechanism 10 and a second detection mechanism 20 having the same structure and being symmetrically arranged;

[0035] The first detection mechanism 10 and the second detection mechanism 20 both include a first linear module 60, a camera 40 and a light source 50 connected to the moving part of the first linear module 60, a second linear module 70 arranged in parallel with the first linear module 60, and a pneumatic chuck 80 connected to the moving part of the second linear module 70; the pneumatic chuck 80 is connected to the output end of the rotary motor;

[0036] The pneumatic chuck 80 is configured to clamp the end of the pipe 30 and rotate the pipe 30; the camera 40 and the light source 50 are respectively disposed above and below the pipe 30, and the camera 40 is configured to take a photo of the pipe 30.

[0037] In this embodiment, combined with Figure 4 and Figure 5 , the first detection mechanism 10 and the second detection mechanism 20 also include a mounting base, a first linear module 60 is arranged above the mounting base, and a second linear module 70 is arranged below the mounting base. Among them, the first linear module 60 and the second linear module 70 realize linear motion, and usually have the following structure: a guide rail, a slider, a lead screw and a drive motor. The drive motor provides a power source, such as a servo motor or a stepper motor. The lead screw transmits power to drive the slider to move. The slider cooperates with the guide rail, carries the load and moves along the guide rail. The guide rail provides precise guidance for the movement of the module to ensure the linearity and stability of the movement.

[0038] In this embodiment, the first detection mechanism 10 and the second detection mechanism 20 further include at least one lifting module, the lifting module is connected to the moving part of the first linear module 60, and the movable part of the lifting module is connected to the camera 40. In this embodiment, two lifting modules are provided, namely the first lifting module 901 and the second lifting module 902, wherein the moving part of the first linear module 60 is connected to the fixed part of the first lifting module 901, the movable part of the first lifting module 901 is connected to the fixed part of the second lifting module 902, and the movable part of the second lifting module 902 is connected to the camera 40.

[0039] Specifically, the moving part of the first linear module 60 is connected to the first slide 903, and one side of the main body of the first lifting module 901 is fixedly connected to the first slide 903; the other side of the main body of the first lifting module 901 is fixedly connected to the second slide 904, and one side of the main body of the second lifting module 902 is fixedly connected to the second slide 904. The first linear module 60 drives the first slide 903 to move in a straight line, and the first slide 903 drives the first lifting module 901 and the second lifting module 902 to move in a straight line. The first lifting module 901 drives the second lifting module 902 to perform a lift, driving the camera 40 to perform a lift. The second lifting module 902 drives the camera 40 to perform a second lift.

[0040] It should be noted that any one or more of the first linear module 60 , the first lifting module 901 and the second lifting module 902 can be selected and started as needed, so as to be suitable for the detection of pipes of different specifications and materials.

[0041] Preferably, a group of reinforcing plates 909 are provided between the first linear module 60 and the first slide 903, and the reinforcing plates 909 improve the strength and rigidity of the connection between the first linear module 60 and the first slide 903, so that it can withstand greater external force, load or impact.

[0042] Furthermore, a first guide module 905 is provided between the first slide 903 and the second slide 904, and the first guide module 905 is configured to guide the moving direction of the second slide 904. The first guide module 905 includes at least one first slide rail fixed to the second slide 904 and at least one first moving block sliding along the first slide rail, and the first moving block is fixedly connected to the first slide 903.

[0043] In this embodiment, the fixing portion of the second lifting module 902 is connected to the mounting seat 907. A bracket 908 is provided on the top of the mounting seat 907, and the bracket 908 is used to mount the camera 40. A light source 50 is provided at the bottom of the mounting seat 907. In addition, a channel is provided near the bottom of the mounting seat 907, and the channel is used for the extension of the pneumatic chuck 80 to clamp the pipe 30.

[0044] Furthermore, the second slide 904 and the mounting seat 907 are provided with a second guide module 906, and the second guide module 906 is configured to guide the moving direction of the mounting seat 907. The second guide module 906 includes at least one second slide rail fixed to the mounting seat 907 and at least one second moving block sliding along the second slide rail, and the second moving block is fixedly connected to the second slide 904.

[0045] The first lifting module 901 may use a single-acting cylinder, and the second lifting module 902 may use a slide cylinder with a guide rail.

[0046] In this embodiment, the camera 40 is a black and white camera. The use of a black and white camera has the following effects: 1. High contrast: It can highlight the contrast difference between the object and the background, especially for some boundaries, lines, etc., which is clearer, which is helpful for accurate detection and identification. 2. Sensitive to light: It can capture subtle changes in light more keenly and has better adaptability to changes in lighting conditions in the detection environment. 3. Reduce color interference: It avoids the interference and confusion that may be caused by color information, so that the detection focus is more on key features such as the shape and contour of the object. 4. High resolution: Under the same conditions, it can often provide higher resolution, so as to more accurately detect tiny details and defects. 5. Simple data processing: Since there is only grayscale information, data processing is relatively simple, which can improve detection efficiency and speed.

[0047] In this embodiment, the light source 50 is a telecentric backlight source. The use of a telecentric backlight source has at least the following advantages: 1. Providing uniform lighting: It can ensure that the entire detection area obtains highly uniform and consistent lighting, reducing the impact of uneven lighting on the detection results. 2. Highlighting contours and features: Making the contours and key features of the object being measured clearer and more obvious, which is convenient for accurate identification and measurement. 3. Improving measurement accuracy: Reducing measurement errors caused by light problems, especially when accurately measuring size, shape, etc. 4. Enhancing contrast: Effectively improving the contrast between the object being measured and the background, which is conducive to accurate judgment and analysis. 5. Suitable for high-precision detection: In the fields of machine vision detection, industrial automation detection, etc., it provides stable and reliable lighting conditions for tasks with high precision requirements. For example, in the coaxiality detection scenario of the pipe 30, the telecentric backlight source can help obtain more accurate and reliable detection results.

[0048] The working principle of this embodiment is as follows:

[0049] The equipment is started, and the pipe 30 is sent to the pipe coaxiality detection device;

[0050] After the pipe 30 is in place, the pneumatic chuck 80 of the first detection mechanism 10 and the pneumatic chuck 80 of the second detection mechanism 20 approach the pipe 30 through the second linear module 70, so that the pneumatic chuck 80 extends into the pipe 30. After the pneumatic chuck 80 reaches the specified position, the clamping jaws are opened to fix the pipe 30.

[0051] The rotation of the motor drives the tube 30 to rotate, and at the same time, the camera 40 above the tube 30 starts to take pictures, rotating a total of eight times, each time rotating 45°, so as to obtain eight images of the tube 30 rotating one circle.

[0052] The obtained surface imaging of the pipe 30 is used for size detection, and the diameter data of a total of eight pipes 30 are obtained, and the average value thereof is taken as the coaxiality of the pipe 30, and the detection result is output. In this process, the position of the camera 40 can be adjusted by one or more of the first linear module 60, the first lifting module 901 and the second lifting module 902.

[0053] The pneumatic chuck 80 moves away from the pipe 30 through the second linear module 70 and returns to the initial state.

[0054] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A pipe coaxiality detection device, characterized in that: It comprises a first detection mechanism (10) and a second detection mechanism (20) which are identical in structure and symmetrically arranged; The first detection mechanism (10) and the second detection mechanism (20) both comprise a first linear module (60), a camera (40) and a light source (50) connected to a moving part of the first linear module (60), a second linear module (70) arranged in parallel with the first linear module (60), and a pneumatic chuck (80) connected to the moving part of the second linear module (70); the pneumatic chuck (80) is connected to an output end of a rotating motor; The pneumatic chuck (80) is configured to clamp the end of the pipe (30) and rotate the pipe (30); the camera (40) and the light source (50) are respectively arranged above and below the pipe (30), and the camera (40) is configured to take a picture of the pipe (30).

2. The pipe coaxiality detection device according to claim 1, characterized in that: The first detection mechanism (10) and the second detection mechanism (20) further include at least one lifting module, the lifting module is connected to the moving part of the first linear module (60), and the movable part of the lifting module is connected to the camera (40).

3. The pipe coaxiality detection device according to claim 2, characterized in that: The lifting module comprises a first lifting module (901) and a second lifting module (902), wherein the moving part of the first linear module (60) is connected to the fixed part of the first lifting module (901), the movable part of the first lifting module (901) is connected to the fixed part of the second lifting module (902), and the movable part of the second lifting module (902) is connected to the camera (40).

4. The pipe coaxiality detection device according to claim 3, characterized in that: The moving part of the first linear module (60) is connected to the first slide (903), and one side of the main body of the first lifting module (901) is fixedly connected to the first slide (903); the other side of the main body of the first lifting module (901) is fixedly connected to the second slide (904), and one side of the main body of the second lifting module (902) is fixedly connected to the second slide (904).

5. The pipe coaxiality detection device according to claim 4, characterized in that: A first guide module is provided between the first slide (903) and the second slide (904), and the first guide module is configured to guide the moving direction of the second slide (904).

6. The pipe coaxiality detection device according to claim 3, characterized in that: The first lifting module (901) is a single-acting cylinder.

7. The pipe coaxiality detection device according to claim 3, characterized in that: The second lifting module (902) is a slide cylinder with a guide rail.

8. The pipe coaxiality detection device according to claim 1, characterized in that: The camera (40) is a black and white camera.

9. The pipe coaxiality detection device according to claim 1, characterized in that: The light source (50) is a telecentric backlight source.

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