A bend angle detection assembly for a pipe bend and a detection method thereof

Abstract

The utility model provides a kind of elbow bending angle detection assembly, including detection support, laser beam detection mechanism and elbow reference fixed mechanism;Detection support includes transverse base and longitudinal support plate, which are perpendicular to each other and are slidably connected along X-axis direction;Longitudinal support plate is locked by fixed bolt one;Laser beam detection mechanism includes laser beam detection frame, swing locking piece and lifting locking piece, laser beam detection frame is connected with swing locking piece up and down swing, and is locked by locking nut one;Swing locking piece is slidably installed on longitudinal support plate along Z-axis direction, and is locked by lifting locking piece;Elbow reference fixed mechanism includes top reference fixed piece and bottom reference fixed piece, which respectively carry out reference positioning to the upper and lower end surfaces of elbow, bottom reference fixed piece is slidably installed on transverse base along Y-axis direction, and is locked by fixed bolt two;Top reference fixed piece includes reference plate, which is fixed to the upper end surface of elbow;The utility model is simple and efficient, with small error and easy to promote.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment technology, and in particular to a component for detecting the bending angle of a pipe and a method for doing so. Background Technology

[0002] Pipe bends are a very common and widely used part in the industrial field. Their processing generally involves first creating a long straight pipe, and then using a bending machine to perform bending operations to complete the part's formation. Cold-bent pipes are primarily processed through physical bending; therefore, due to differences in the material's inherent plasticity, whether the bent pipe fully meets the design and production requirements after bending becomes a key factor determining the quality of the bent pipe product.

[0003] To address this issue, Chinese invention patent No. 201810057094.4, entitled "A Measuring Tool for Detecting the Spatial Angle of a Bending Pipe," discloses the following solution: It includes a base, a measuring arm, and a support vertically and slidably mounted on the base. The base has a first positioning device for vertically positioning the positioning end of the bending pipe on the base, and a clamping device for clamping the positioning end of the bending pipe. The clamping center of the clamping device coincides with the axis of the positioning end of the bending pipe. The first positioning device slides closer to or further away from the support. A rectangular platform is slidably mounted on the support. One end of the measuring arm is hinged to the rectangular platform. A second positioning device is slidably mounted on the bottom surface of the measuring arm for vertically positioning the end of the bending pipe to be measured on the measuring arm. Beneficial effects: The measuring tool for detecting the spatial angle of a bending pipe of this invention has a simple structure, is easy to operate, and is low in cost. It can measure the spatial angle of a bending pipe and inspect the quality of batch products even under non-high-precision testing requirements.

[0004] However, after conducting trial production research on the above-mentioned patented technical solutions, it was found that when measuring the same batch of bent pipes, it is still necessary to manually measure each piece, which not only results in low detection efficiency but may also lead to large measurement errors.

[0005] As is well known, when measuring the spatial angle of a bent pipe, it is considered qualified as long as the spatial angle of the bent pipe falls within a set reasonable range; otherwise, it is considered unqualified. Therefore, it is more necessary to invent a measuring instrument that can set a detection benchmark, thereby improving efficiency and reducing errors. Summary of the Invention

[0006] To address the above problems, this invention proposes a pipe bending angle detection component and its detection method. The technical solution used is as follows:

[0007] A pipe bending angle detection component, characterized in that it includes a detection bracket, a laser beam detection mechanism, and a pipe bending reference fixing mechanism;

[0008] The detection bracket includes a transverse base and a longitudinal support plate that are perpendicular to each other and slidably connected along the X-axis; the transverse base is fixedly placed on the ground, and the longitudinal support plate is locked relative to the transverse base by a fixing bolt.

[0009] The laser beam detection mechanism includes a laser beam detection frame, a swing locking component, and a lifting locking component. The laser beam detection frame is connected to the swing locking component in a swinging manner, and the swing angle is locked by the action of the locking nut in the swing locking component. The swing locking component is slidably installed on the longitudinal support plate along the Z-axis direction and is locked by the lifting locking component.

[0010] The pipe bending reference fixing mechanism includes a top reference fixing component and a bottom reference fixing component for reference positioning of the upper and lower end faces of the pipe, respectively. The bottom reference fixing component is slidably installed on the transverse base along the Y-axis direction and locked relative to the transverse base by fixing bolt two. The top reference fixing component includes a reference plate that fits against the upper end face of the pipe for fixing. The reference plate has at least two ring areas. The laser beam detection frame emits a laser beam to the reference plate and determines whether the bending angle of the pipe is within the qualified range by the position of the laser beam landing on the reference plate.

[0011] The laser beam detection mechanism is electrically connected to the computer.

[0012] Furthermore, the laser beam detection frame includes a detection frame body and a laser beam pen; one end of the detection frame body is connected to a swing locking member for swinging up and down; the laser beam pens are evenly distributed on the inner wall of the detection frame body, and the laser beam pens on opposite sides of the inner wall are staggered; the beams generated by multiple laser beam pens are located in the same plane and are staggered to form a beam network, and the plane where the beam network is located is a standard reference plane.

[0013] Furthermore, the laser beam detection frame also includes an image acquisition sensor and a ranging sensor; a mounting bracket is installed on the top of the detection frame, and the image acquisition sensor and at least one ranging sensor are mounted on the mounting bracket.

[0014] Further, the swing locking component includes a locking block, a swing shaft, a locking nut, a locking bushing, and a swing bushing; the longitudinal support plate is provided with a slide rail seat three and a strip hole along the Z-axis direction; the strip hole is located on the center line of the slide rail seat three; the rear end of the locking block is slidably mounted on the slide rail seat three via the provided slide rail three; the center of the slide rail three is provided with a locking hole corresponding to the strip hole, the lifting locking component passes through the locking hole and the strip hole, and fixes the locking block on the slide rail seat three; one end of the detection frame is fixedly connected to the swing bushing; the front end of the locking block is provided with a U-shaped groove in the middle, and mounting through holes are provided on both sides, the two locking bushings are slidably disposed in the two mounting through holes, and the swing bushing is located between the two locking bushings; the swing shaft passes through the swing bushing and the two locking bushings, and is fixed in one of the mounting through holes; the locking nut is installed in the other mounting through hole for mutual locking of the swing bushing and the two locking bushings.

[0015] Furthermore, the top reference fixing component also includes a tension spring, a fixing component one, and a pull rope; the fixing component one is placed inside the bent tube, and one end is connected to the reference plate through the tension spring, and the other end is connected to the pull rope; the length of the pull rope is greater than that of the bent tube; the pull rope is pulled from the lower end of the bent tube, and the pull rope drives the fixing component one to make the reference plate connect and fit against the upper end surface of the bent tube, and then the fixing component one is fixed to the bent tube.

[0016] Furthermore, the fixing component one includes a rigid support rod one and an airbag one; the upper and lower ends of the rigid support rod one are connected to a tension spring and a tension rope, respectively; an air intake channel is opened at the lower end of the rigid support rod one, and at least one vent hole communicating with the air intake channel is opened on the side surface; the airbag one is tightly wrapped around one side surface of the rigid support rod one, and its interior communicates with the vent hole one; the top reference fixing component also includes a pneumatic connector one and an air pipe one; one end of the air pipe one is connected to the air intake channel at the lower end of the rigid support rod one through the pneumatic connector one, and the other end extends out of the bend pipe and is connected to one of the control valves provided in the bend pipe reference fixing mechanism.

[0017] Furthermore, the bottom reference fixing component includes a reference base and a fixing component two; a slide rail seat one is provided on the transverse base along the Y-axis direction, and the lower end of the reference base is slidably mounted on the slide rail seat one through the provided slide rail one, and locked by at least one fixing bolt two threaded to the reference base; the fixing component two is fixedly mounted on the reference base for fixing the bent pipe; a zero reference line one is provided on the upper surface of the reference base, and a zero reference line two is provided on the bent pipe, and the bent pipe achieves its own zero reference positioning by aligning the zero reference line two with the zero reference line one.

[0018] Furthermore, the second fixing component includes a rigid support rod, an airbag, a pneumatic connector, and an air tube; the lower end of the rigid support rod is fixedly connected to the reference base; the airbag is fixedly installed on the side surface of the rigid support rod and has an air inlet at the bottom; one end of the air tube is connected to the air inlet of the airbag through the pneumatic connector, and the other end extends out of the bend and connects to another control valve in the bend reference fixing mechanism.

[0019] Furthermore, the rigid support rod has an air supply channel at its center; both ends of the air supply channel are connected to an air pipe via a pneumatic connector.

[0020] A method for detecting the bending angle of a pipe bend, characterized by comprising the following steps:

[0021] Step 1: Prepare a standard bent pipe and set the qualified and unqualified ring areas of the reference plate.

[0022] Step 2: Insert the tension spring, fixing component 1, and pull rope from the top reference fixing component into the upper end of the bend, and connect the lower end of the air tube to the pneumatic connector 1 on the rigid support rod 2; then pull the pull rope, which drives the reference plate to fit against the upper end face of the bend through fixing component 1; thereafter, without releasing the pull rope, the corresponding control valve is energized, inflating airbag 1 to a certain pressure, at which point the reference plate is fitted and fixed against the upper end face of the bend;

[0023] Step 3: Insert the lower end of the bend into the second fixing piece and make it fit against the reference base; then the corresponding control valve is energized to inflate the second airbag to a certain pressure. At this time, the reference base is fitted and fixed against the lower end face of the bend.

[0024] Step 5: Coordinate the operation of the longitudinal support plate, the bottom reference fixing component, and the laser beam detection mechanism to make the reference plate parallel to the detection frame and in parallel contact with the laser beam emitted by the laser beam pen; then lock and fix the bottom reference fixing component of the longitudinal support plate and the laser beam detection mechanism; at this point, the detection reference for the bending angle of the pipe is set.

[0025] Step 6: Perform the same steps 2 to 4 on the bent pipe made according to the same size and specifications. After completion, read the ring area where the laser point set on the reference plate by the laser beam pen is located through the image displayed on the computer to determine whether the bent pipe is qualified.

[0026] During this process, if the bend to be tested is too long or too short, resulting in an excessively large or small reading on the distance measuring sensor, the bend to be tested is deemed unqualified.

[0027] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0028] This invention, through the coordinated design of the detection bracket, laser beam detection mechanism, and bending tube reference fixing mechanism, effectively improves work efficiency and reduces operational errors, while also having the advantages of simple operation and easy promotion. Attached Figure Description

[0029] Figure 1-3 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 4-5 This is a schematic diagram of the structure of the detection bracket of the present invention.

[0031] Figure 6 For the present invention Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0032] Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0033] Figure 8 This is a schematic diagram of the exploded assembly structure of the laser beam detection mechanism and the detection bracket of the present invention.

[0034] Figure 9 This is a schematic diagram of the laser beam detection mechanism of the present invention.

[0035] Figure 10 This is a schematic diagram of the exploded assembly structure of the laser beam detection frame and the swing locking component in the laser beam detection mechanism of the present invention.

[0036] Figure 11-12 This is a schematic diagram of the structure of the laser beam detection frame in the laser beam detection mechanism of the present invention.

[0037] Figure 13 This is a schematic diagram of the assembly structure of the pipe bending reference fixing mechanism and the pipe bending according to the present invention.

[0038] Figure 14 This is a schematic diagram of the exploded assembly structure of the pipe bending reference fixing mechanism and the pipe bending according to the present invention.

[0039] Figure 15 This is a schematic diagram of the bottom reference fixing member in the pipe bending reference fixing mechanism of the present invention.

[0040] Figure 16 For the present invention Figure 15 A schematic diagram of the cross-sectional structure along the CC direction.

[0041] Figure 17 This is an exploded structural diagram of the top reference fixing member in the pipe bending reference fixing mechanism of the present invention.

[0042] Figure 18 This is a cross-sectional structural diagram of the first fixing member in the top reference fixing member of the present invention.

[0043] Figure 19 This is a schematic diagram of the laser detection results of a standard bent pipe in Embodiment 1 of the present invention.

[0044] Figure 20-27 This is a schematic diagram of the laser detection results of the bent pipe under test in Embodiment 1 of the present invention.

[0045] Icon labels:

[0046] 1-Detection bracket;

[0047] 11-Horizontal base (1101-Slide rail seat one; 1102-Slide groove one); 12-Vertical support plate (1201-Slide rail seat three; 1202-Slide groove three; 1203-Strip hole);

[0048] 2-Laser beam detection mechanism;

[0049] 21-Laser beam detection frame (2101-Detection frame body; 2102-Laser beam pen; 2103-Mounting bracket; 2104-Image acquisition sensor; 2105-Distance sensor; 2106-Standard reference surface); 22-Swing locking component [2201-Locking block (2201a-Slide rail three); 2202-Swing shaft; 2203-Locking nut one; 2204-Locking bushing; 2205-Swing bushing]; 23-Lifting locking component;

[0050] 3-Bend pipe reference fixing mechanism;

[0051] 31-Top reference fixing component [3101-Reference plate; 3102-Tension spring; 3103-Fixing component one (3103a-Rigid support rod one; 3103b-Airbag one); 3104-Pneumatic connector one; 3105-Pull rope; 3106-Air hose one]; 32-Bottom reference fixing component [3201-Reference base (3201a-Slide rail one; 3201b-Zero reference line one); 3202-Rigid support rod two (3202a-Air supply channel); 3203-Airbag two (3203a-Air inlet); 3204-Fixing bolt two; 3205-Pneumatic connector two; 3206-Air hose two]; 33-Control valve;

[0052] 4- Bend;

[0053] 41-Zero baseline two. Detailed Implementation

[0054] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0055] In the description of this invention, it should be noted that the terms "upper", "lower", "in", "out", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example 1:

[0056] This embodiment is used to detect the bending angle of pipes in the same batch. It has the advantages of simple and efficient operation and small error. Specifically, as follows: Figure 1-5 As shown in Figures 8-9 and 13-14, a pipe bending angle detection assembly includes a detection bracket 1, a laser beam detection mechanism 2, and a pipe bending reference fixing mechanism 3. The detection bracket 1 includes a transverse base 11 and a longitudinal support plate 12 that are perpendicular to each other and slidably connected along the X-axis. Specifically, the transverse base 11 is fixedly placed on the ground. The transverse base 11 is provided with a slide rail seat 2 along the X-axis and a slide groove 2 located on both sides of the slide rail seat 2 and parallel to the slide rail seat 2. The longitudinal support plate 12 is slidably installed on the slide rail seat 2 through the provided slide rail 2 and is locked and fixed relative to the slide groove 2 by a fixing bolt 1 threadedly connected to the longitudinal support plate 12.

[0057] The laser beam detection mechanism 2 includes a laser beam detection frame 21, a swing locking component 22, and a lifting locking component 23. The laser beam detection frame 21 is connected to the swing locking component 22 by swinging up and down, and the swing angle is locked by the locking nut 2203 in the swing locking component 22. The swing locking component 22 is slidably installed on the longitudinal support plate 12 along the Z-axis direction and is locked by the lifting locking component 23. The laser beam detection mechanism 2 is electrically connected to a computer.

[0058] The pipe bending reference fixing mechanism 3 includes a top reference fixing member 31 and a bottom reference fixing member 32 for reference positioning of the upper and lower end faces of the pipe bending 4, respectively. The bottom reference fixing member 32 is slidably installed on the transverse base 11 along the Y-axis direction and is locked relative to the transverse base 11 by fixing bolt 3204. The top reference fixing member 31 includes a reference plate 3101 that fits against the upper end face of the pipe bending 4 for fixing. The reference plate 3101 is provided with six ring areas. The laser beam detection frame 21 emits a laser beam to the reference plate 3101 and determines whether the bending angle of the pipe bending is within the qualified range by the position of the laser beam landing on the reference plate 3101.

[0059] As a specific implementation method of this embodiment, such as Figure 6-12 As shown, the laser beam detection frame 21 includes a detection frame 2101 and a laser beam pen 2102. The detection frame 2101 is square or rectangular, and one end is connected to the swing locking member 22 for vertical swinging. The laser beam pens 2102 are evenly distributed on the inner wall of the detection frame 2101, and the laser beam pens 2102 on opposite sides of the inner wall are staggered. The beams generated by multiple laser beam pens 2102 are located in the same plane and are staggered to form a beam network. The plane where the beam network is located is the standard reference plane 2106. It should be noted that the detection frame 2101 can be set to be very large. In this embodiment, in order to better show the deflection relationship between the reference plate 3101 and the detection frame 2101, the detection frame 2101 is designed to be relatively compact.

[0060] To further reduce visual illusion errors, the laser beam detection frame 21 also includes an image acquisition sensor 2104 and four distance sensors 2105. A mounting bracket 2103 is installed on the top of the detection frame 2101. The image acquisition sensor 2104 and four distance sensors 2105 are mounted on the mounting bracket 2103, and the detection surface is directly opposite the laser mesh surface emitted by the laser beam pen 2102. In this embodiment, the image acquisition sensor 2104 is a color industrial CCD camera from Fantasia Technology, model FT-W283. The brand of the image acquisition sensor 2104 is HYPERSEN, model HPS-166.

[0061] Specifically, the swing locking component 22 includes a locking block 2201, a swing shaft 2202, a locking nut 2203, a locking bushing 2204, and a swing bushing 2205; the longitudinal support plate 12 is provided with a slide rail seat 1201, a slide groove 1202, and a slotted hole 1203 along the Z-axis direction; the slide groove 1202 is provided on both sides of the slide rail seat 1201, and the function of the slide groove 1202 is to ensure that the swing locking component 22 does not sway left and right relative to the longitudinal support plate 12; the slotted hole 1203 is provided on both sides of the slide rail seat 1201. The center line of slide rail base 3 1201; the rear end of locking block 2201 is slidably mounted on slide rail base 3 1201 via slide rail 3 2201a; the center of slide rail 3 is provided with a locking hole corresponding to the strip hole 1203, the lifting locking member 23 passes through the locking hole and the strip hole 1203, and fixes the locking block 2201 to slide rail base 3 1201; specifically, the lifting locking member 23 includes a lifting locking bolt and a lifting locking nut, the lifting locking bolt passing through the locking hole and the strip hole 1203 in sequence. 03, and is locked by connecting to the lifting locking nut located behind the strip hole 1203; one end of the detection frame 2101 is fixedly connected to the swing bushing 2205; the locking block 2201 has a U-shaped groove in the middle of the front end, and mounting through holes on both sides, and each of the two mounting through holes has a section of internal thread; the two locking bushings 2204 are slidably disposed in the two mounting through holes, and the swing bushing 2205 is located between the two locking bushings 2204; in this embodiment, the rear end of the swing shaft 2202 is fixedly provided with A hexagonal plug is used to connect the swing shaft 2202. The front end of the swing shaft 2202 passes through the swing sleeve 2205 and two locking sleeves 2204, and is fixed in one of the mounting through holes by the threaded plug at the rear end. The locking nut 2203 is threaded in the other mounting through hole, which pushes the corresponding locking sleeve 2204 (with end face ratchet on the inner surface) towards the swing sleeve 2205 (with matching end face ratchet on the outer surface), thereby locking the swing sleeve 2205 and the two locking sleeves 2204 together.

[0062] As a specific implementation method of this embodiment, such as Figure 13-18 As shown, the top reference fixing member 31 also includes a tension spring 3102, a fixing member 3103, and a pull rope 3105; the fixing member 3103 is placed inside the bent tube 4, and one end is connected to the reference plate 3101 through the tension spring 3102, and the other end is connected to the pull rope 3105; the length of the pull rope 3105 is greater than that of the bent tube 4; the pull rope 3105 is pulled from the lower end of the bent tube, and the pull rope 3105 drives the fixing member 3103 to make the reference plate 3101 connect to the upper end face of the bent tube 4, and then the fixing member 3103 is fixed to the bent tube 4;

[0063] Specifically, the fixing component 3103 includes a rigid support rod 3103a and an airbag 3103b; the upper and lower ends of the rigid support rod 3103a are connected to the tension spring 3102 and the pull rope 3105, respectively; the lower end of the rigid support rod 3103a has an air intake channel, and multiple ventilation holes communicating with the air intake channel are evenly distributed on its side surface; the airbag 3103b is tightly wrapped around the side surface of the rigid support rod 3103a, and its interior communicates with the ventilation holes; the top reference fixing component 31 also includes a pneumatic connector 3104 and an air pipe 3106; one end of the air pipe 3106 is connected to the air intake channel at the lower end of the rigid support rod 3103a through the pneumatic connector 3104, and the other end extends out of the bend pipe 4 and is connected to one of the control valves 33 provided in the bend pipe reference fixing mechanism 3;

[0064] The bottom reference fixing component 32 includes a reference base 3201 and a fixing component 2; the transverse base 11 is provided with a slide rail seat 1101 and a slide groove 1102 along the Y-axis direction. The lower end of the reference base 3201 is slidably mounted on the slide rail seat 1101 through the provided slide rail 1 3201a, and is locked relative to the two slide grooves 1102 by four fixing bolts 2 3204 threaded to the reference base 3201; the fixing component 2 is fixedly mounted on the reference base 3201 for fixing the bent pipe 4; the upper surface of the reference base 3201 is provided with a zero reference line 1 3201b, and the bent pipe 4 is provided with a zero reference line 2 41. The bent pipe 4 achieves its own zero reference positioning by aligning the zero reference line 2 41 with the zero reference line 1 3201b.

[0065] The second fixing component includes a rigid support rod 3202, an airbag 3203, a pneumatic connector 3205, and an air pipe 3206. The lower end of the rigid support rod 3202 is fixedly connected to the reference base 3201. The airbag 3203 is fixedly installed on the side surface of the rigid support rod 3202 and has an air inlet 3203a at the bottom. One end of the air pipe 3206 is connected to the air inlet 3203a of the airbag 3203 through the pneumatic connector 3205, and the other end extends out of the bend 4 and is connected to another control valve 33 provided in the bend reference fixing mechanism 3.

[0066] To facilitate the connection and installation of the first air tube 3106, the rigid support rod 3202 has an air delivery channel 3202a in the center; both ends of the air delivery channel 3202a are connected to the first air tube 3106 through pneumatic connectors 3104 respectively.

[0067] In this embodiment, in order to further reduce the interference caused by air tube 1 3106 and air tube 2 3206 during the fixing of the reference of the bend 4, such as Figure 16As shown, the reference base 3201 is configured with two layers: the upper layer is the reference base plate, and the lower layer is the sliding base. The two layers are connected by a support plate. The slide rail 3201a is located at the bottom of the lower layer, and the fixing component is located at the top of the upper layer. The upper layer of the reference base 3201 has corresponding through holes 1 and 2 through the air supply channel 3202a and the air inlet 3203a. One end of the through hole 1 is fixedly connected to the pneumatic connector 3104, and the other end is sealed to the air supply channel 3202a. One end of the through hole 2 is fixedly connected to the pneumatic connector 3205, and the other end is sealed to the air inlet 3203a.

[0068] A method for detecting the bending angle of a pipe bend, comprising the following steps:

[0069] Step 1: Prepare a standard bent pipe 4. In this embodiment, the qualified ring area of ​​the reference plate 3101 is set as 1-2 rings from the outside to the inside, and the unqualified ring area is 3-6 rings from the outside to the inside.

[0070] Step 2: Insert the tension spring 3102, fixing member 3103, and pull rope 3105 from the top reference fixing member 31 through the upper end of the bend 4, and connect the lower end of the air pipe 3106 to the pneumatic connector 3104 on the rigid support rod 3202; then pull the pull rope 3105, which drives the fixing member 3103 to make the reference plate 3101 fit against the upper end face of the bend 4; thereafter, without releasing the pull rope 3105, the corresponding control valve 33 is energized, inflating the airbag 3103b to a certain pressure, at which point the reference plate 3101 is fitted and fixed against the upper end face of the bend 4;

[0071] Step 3: Insert the lower end of the bend 4 into the fixing part 2, and make it fit against the reference base 3201. Align the zero reference line 2 41 on the bend 4 with the zero reference line 1 3201b on the upper surface of the reference base 3201. Then, the corresponding control valve 33 is energized to inflate the airbag 2 3203 to a certain pressure. At this time, the reference base 3201 is fitted and fixed against the lower end face of the bend 4.

[0072] Step 5: Using the longitudinal support plate 12, the bottom reference fixing component 32, and the laser beam detection mechanism 2, ensure that the reference plate 3101 is parallel to the detection frame 2101 and exactly parallel to the laser beam emitted from the laser beam pen 2102. Figure 19 As shown; then the bottom reference fixing piece 32 of the longitudinal support plate 12 and the laser beam detection mechanism 2 are locked and fixed; at this time, the detection reference setting of the bending angle of the pipe 4 is completed;

[0073] Step six: Following steps two through four, process the bent pipe 4, which is made to the same size and specifications. After completion, read the ring area where the laser point set on the reference plate 3101 by the laser beam pen 2102 is located using the image displayed on the computer. This will determine whether the bent pipe 4 is qualified. The specific details are as follows:

[0074] (a) When the reference plate 3101 is tilted relative to the laser mesh only in the X-axis or Y-axis direction, if the laser point falls on such a direction... Figure 20 If it falls within the ring area, it is considered qualified; if it falls within the ring area, it is considered qualified. Figure 21 If the area is within the designated ring zone, it is considered unqualified;

[0075] (ii) When the reference plate 3101 is tilted relative to the laser mesh surface in both the X and Y axes, if the laser point falls on... Figure 22 If it falls within the ring area, it is considered qualified; if it falls within the ring area, it is considered qualified. Figure 23 If the area is within the designated ring zone, it is considered unqualified;

[0076] During this process, if the measured bend 4 is too long or too short, causing the distance sensor 2105 reading to be too high or too low, the measured bend 4 is judged to be unqualified. The specific situation is as follows:

[0077] (i) If the bend 4 is too long and the reference plate 3101 completely passes through the laser mesh, then regardless of whether the reference plate 3101 is skewed in the X-axis and / or Y-axis directions, it is considered unqualified. Figure 24 and 26 As shown;

[0078] (ii) If the bend 4 is too short and the reference plate 3101 is not close to the laser mesh surface, then regardless of whether the reference plate 3101 is skewed in the X-axis and / or Y-axis directions, it is considered unqualified. Figure 25 and 27 As shown.

Claims

1. A component for detecting the bending angle of a pipe, characterized in that, It includes a testing bracket (1), a laser beam testing mechanism (2), and a pipe bending reference fixing mechanism (3); The detection bracket (1) includes a transverse base (11) and a longitudinal support plate (12) that are perpendicular to each other and slidably connected along the X-axis; the transverse base (11) is fixedly placed on the ground, and the longitudinal support plate (12) is locked relative to the transverse base (11) by a fixing bolt. The laser beam detection mechanism (2) includes a laser beam detection frame (21), a swing locking component (22), and a lifting locking component (23). The laser beam detection frame (21) is connected to the swing locking component (22) by swinging up and down, and the swing angle is locked under the action of the locking nut (2203) in the swing locking component (22). The swing locking component (22) is slidably installed on the longitudinal support plate (12) along the Z-axis direction and is locked by the lifting locking component (23). The bend reference fixing mechanism (3) includes a top reference fixing member (31) and a bottom reference fixing member (32) for reference positioning of the upper and lower end faces of the bend (4), respectively. The bottom reference fixing member (32) is slidably installed on the transverse base (11) along the Y-axis direction and is locked relative to the transverse base (11) by fixing bolt two (3204). The top reference fixing member (31) includes a reference plate (3101) that fits against the upper end face of the bend (4) for fixing. The reference plate (3101) has at least two ring areas. The laser beam detection frame (21) emits a laser beam to the reference plate (3101) and determines whether the bending angle of the bend is within the qualified range by the landing point of the laser beam on the reference plate (3101). The laser beam detection mechanism (2) is electrically connected to the computer; The laser beam detection frame (21) includes a detection frame (2101) and a laser beam pen (2102); one end of the detection frame (2101) is connected to the swing locking member (22) for swinging up and down; the laser beam pens (2102) are evenly installed on the inner wall of the detection frame (2101), and the laser beam pens (2102) on each pair of opposite inner walls are staggered; the beams generated by multiple laser beam pens (2102) are located in the same plane and are staggered to form a beam network, and the plane where the beam network is located is the standard reference plane (2106). The laser beam detection frame (21) also includes an image acquisition sensor (2104) and a distance sensor (2105); a mounting bracket (2103) is installed on the top of the detection frame (2101), and the image acquisition sensor (2104) and at least one distance sensor (2105) are mounted on the mounting bracket (2103).

2. The pipe bending angle detection component according to claim 1, characterized in that, The swing locking component (22) includes a locking block (2201), a swing shaft (2202), a locking nut (2203), a locking bushing (2204), and a swing bushing (2205); the longitudinal support plate (12) is provided with a slide rail seat (1201) and a strip hole (1203) along the Z-axis direction; the strip hole (1203) is located on the center line of the slide rail seat (1201); the rear end of the locking block (2201) is slidably mounted on the slide rail seat (1201) through the provided slide rail (2201a); the center of the slide rail seat (2201) is provided with a locking hole corresponding to the strip hole (1203), and the lifting locking component (23) passes through the locking hole and the strip hole (1203) and holds the locking block (2201) in place. 01) Fixed on the slide rail seat three (1201); one end of the detection frame (2101) is fixedly connected to the swing bushing (2205); the locking block (2201) has a U-shaped groove in the middle of the front end and mounting through holes on both sides. The two locking bushings (2204) are slidably disposed in the two mounting through holes. The swing bushing (2205) is located between the two locking bushings (2204); the swing shaft (2202) passes through the swing bushing (2205) and the two locking bushings (2204) and is fixed in one of the mounting through holes; the locking nut one (2203) is installed in the other mounting through hole for mutual locking of the swing bushing (2205) and the two locking bushings (2204).

3. The pipe bending angle detection component according to claim 2, characterized in that, The top reference fixing member (31) also includes a tension spring (3102), a fixing member one (3103), and a pull rope (3105); the fixing member one (3103) is placed inside the bent tube (4), and one end is connected to the reference plate (3101) through the tension spring (3102), and the other end is connected to the pull rope (3105); the length of the pull rope (3105) is greater than that of the bent tube (4); the pull rope (3105) is pulled from the lower end of the bent tube, and the pull rope (3105) is driven by the fixing member one (3103) to make the reference plate (3101) fit against the upper end surface of the bent tube (4), and then the fixing member one (3103) is fixed to the bent tube (4).

4. The pipe bending angle detection component according to claim 3, characterized in that, The fixing component 1 (3103) includes a rigid support rod 1 (3103a) and an airbag 1 (3103b); the upper and lower ends of the rigid support rod 1 (3103a) are connected to a tension spring (3102) and a pull rope (3105) respectively; the lower end of the rigid support rod 1 (3103a) is provided with an air intake channel, and at least one ventilation hole communicating with the air intake channel is provided on the side surface; the airbag 1 (3103b) is tightly wrapped and disposed on the side surface of the rigid support rod 1 (3103a), and its interior is connected with the ventilation hole; the top reference fixing component (31) also includes a pneumatic connector 1 (3104) and an air pipe 1 (3106); one end of the air pipe 1 (3106) is connected to the air intake channel at the lower end of the rigid support rod 1 (3103a) through the pneumatic connector 1 (3104), and the other end extends out of the bend pipe (4) and is connected to one of the control valves (33) provided in the bend pipe reference fixing mechanism (3).

5. The pipe bending angle detection component according to claim 4, characterized in that, The bottom reference fixing component (32) includes a reference base (3201) and a fixing component two; the transverse base (11) is provided with a slide rail seat one (1101) along the Y-axis direction, the lower end of the reference base (3201) is slidably mounted on the slide rail seat one (1101) through the provided slide rail one (3201a), and is locked by at least one fixing bolt two (3204) threaded to the reference base (3201); the fixing component two is fixedly mounted on the reference base (3201) for fixing the bent pipe (4); the upper surface of the reference base (3201) is provided with a zero reference line one (3201b), the bent pipe (4) is provided with a zero reference line two (41), and the bent pipe (4) achieves its own zero reference positioning by aligning the zero reference line two (41) with the zero reference line one (3201b).

6. The pipe bending angle detection component according to claim 5, characterized in that, The second fixing component includes a rigid support rod (3202), an airbag (3203), a pneumatic connector (3205), and an air pipe (3206). The lower end of the rigid support rod (3202) is fixedly connected to the reference base (3201). The airbag (3203) is fixedly installed on the side surface of the rigid support rod (3202) and has an air inlet (3203a) at the bottom. One end of the air pipe (3206) is connected to the air inlet (3203a) of the airbag (3203) through the pneumatic connector (3205), and the other end extends out of the bend (4) and is connected to another control valve (33) in the bend reference fixing mechanism (3).

7. The pipe bending angle detection component according to claim 6, characterized in that, The rigid support rod 2 (3202) has an air supply channel (3202a) in the center; the two ends of the air supply channel (3202a) are respectively connected to the air pipe 1 (3106) through the pneumatic connector 1 (3104).

8. The detection method of the pipe bending angle detection component according to claim 7, characterized in that, Includes the following steps: Step 1: Prepare a standard bent pipe (4) and set the qualified and unqualified ring areas of the reference plate (3101); Step 2: Insert the tension spring (3102), fixing part 1 (3103), and pull rope (3105) from the top reference fixing part (31) into the upper end of the bend (4), and connect the lower end of the air pipe 1 (3106) to the pneumatic connector 1 (3104) on the rigid support rod 2 (3202); then pull the pull rope (3105), and the pull rope (3105) will drive the pull rope (3105) through the fixing part 1 (3103) to make the reference plate (3101) fit against the upper end face of the bend (4); thereafter, without loosening the pull rope (3105), the corresponding control valve (33) will be energized to inflate the airbag 1 (3103b) to a certain pressure, at which time the reference plate (3101) will fit against the upper end face of the bend (4) and be fixed. Step 3: Insert the lower end of the bent tube (4) into the fixing part 2 and attach it to the reference base (3201); then the corresponding control valve (33) is energized to inflate the airbag 2 (3203) to a certain pressure. At this time, the reference base (3201) is attached and fixed to the lower end face of the bent tube (4). Step 5: With the operation of the longitudinal support plate (12), the bottom reference fixing piece (32) and the laser beam detection mechanism (2), make the reference plate (3101) parallel to the detection frame (2101) and in parallel contact with the laser beam emitted by the laser beam pen (2102); then lock and fix the operation of the longitudinal support plate (12), the bottom reference fixing piece (32) and the laser beam detection mechanism (2); at this time, the detection reference for the bending angle of the bent pipe (4) is set. Step six, the bent pipe (4) made according to the same size and specifications is operated according to steps two to four. After completion, the laser point of the laser beam pen (2102) set on the reference plate (3101) is read through the image displayed on the computer to determine whether the bent pipe (4) to be tested is qualified. During this process, if the test tube (4) is too long or too short, causing the reading of the distance sensor (2105) to be too large or too small, the test tube (4) is judged to be unqualified.

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