Detection device and detection method for sealing ring

Abstract

The invention relates to the technical field of sealing ring detection equipment, and particularly discloses a sealing ring detection device and method, and the device comprises a main body structure, a pressing structure, an expanding structure, and two pairs of positioning structures. The pressing structure is fixedly arranged on the main body structure, the expanding structure is fixedly arranged on the main body structure and located below the pressing structure, and the two pairs of positioning structures are arranged on the main body structure at equal intervals and located on the two sides of the expanding structure correspondingly; the main body structure is used for controlling and bearing a to-be-tested sealing ring, the positioning structure is used for positioning the sealing ring at a central part, and the pressing structure is used for carrying out a pressing test on the positioned sealing ring; according to the sealing ring testing device, circumferential equidistant arrangement and 30-degree interval are realized through the positioning structure and the expanding structure, the sealing ring to be detected can be accurately centered, positioned and limited through cooperative clamping from six directions, and the multi-direction cooperative positioning mode can effectively reduce deviation and shaking of the sealing ring in the testing process, so that the accuracy of a testing result is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing ring detection equipment, and in particular to a sealing ring detection device and a sealing ring detection method. Background Art

[0002] A sealing ring is a sealing accessory, mainly used in pipelines, pressure vessels, mechanical foundations and other occasions to prevent medium leakage; sealing rings are mostly used for pipeline connections and have a circular ring structure. During the production process, the sealing rings need to be tested for anti-deformation to verify whether they are qualified; the anti-deformation test of rubber sealing rings usually adopts compression deformation test, tensile test, etc. The existing anti-deformation detection device has a single function and can usually only perform one anti-deformation test, and the test structure can only refer to the appearance description, and the corresponding effective data cannot be obtained. Summary of the invention

[0003] In view of the defects of the prior art, a sealing ring detection device and a detection method are provided, which solve the problem of multi-functional testing mode and realize the description of the test results of the sealing ring by test data and appearance deformation.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealing ring detection device, comprising a main structure, a downward pressure structure, an expansion structure and two pairs of positioning structures; the downward pressure structure is fixedly arranged on the main structure, the expansion structure is fixedly arranged on the main structure and is located below the downward pressure structure, the two pairs of positioning structures are equidistantly arranged on the main structure, and the positioning structures are respectively located on both sides of the expansion structure; the main structure is used to control and carry the sealing ring to be tested, the positioning structure is used to position the sealing ring in the center, the downward pressure structure is used to perform a downward pressure test on the positioned sealing ring, and the expansion structure is used to perform a tensile test on the sealing ring.

[0005] Preferably, the main structure includes a base, a mounting frame, a pair of support arms, a carrying plate and a controller; the mounting frame is L-shaped, one end of the mounting frame is fixedly arranged on the middle of the upper wall at the right end of the base, the other end of the mounting frame is located above the left end of the base, one end of a pair of support arms are symmetrically arranged on the left side wall of one end of the mounting frame, the carrying plate is circular, and three pairs of positioning grooves are equidistantly opened through the carrying plate, one pair of the positioning grooves is parallel to the base, the carrying plate is fixedly arranged on the other end of a pair of support arms, and the carrying plate is located above the base, the other end of the support arm is located on the front and rear sides of one of the positioning grooves, and the controller is fixedly arranged on the upper wall at the other end of the mounting frame.

[0006] Preferably, the pressing structure includes a first hydraulic cylinder, a pressure plate, a pair of telescopic rods, a pair of first springs, a first electric slide rail, a pressure plate, a first infrared rangefinder and a camera; one end of the first hydraulic cylinder is fixedly passed through the upper wall of the other end of the mounting frame and is located on the center line; the pressure plate is circular and a mounting groove is formed through the lower wall of the pressure plate; the mounting groove is perpendicular to the support arm; the pressure plate is fixedly arranged on the telescopic end of the first hydraulic cylinder and the pressure plate is located below the other end of the mounting frame; the pressure plate is located above the bearing plate and corresponds to the bearing plate; one end of a pair of telescopic rods respectively passes through the upper wall of the mounting frame and is fixedly connected to the pressure plate; a The telescopic rod is located on the left and right sides of the first hydraulic cylinder, a pair of the telescopic rods are both T-shaped rod bodies, a pair of the first springs are respectively movably mounted on the other end of the telescopic rod and are located above the other end of the mounting frame, the first electric slide rail is fixedly embedded in the rear end of the mounting groove, the pressure plate is fixedly arranged on the first electric slide rail near one end, and the pressure plate is movably embedded in the mounting groove, the length of the pressure plate is greater than the diameter of the pressure plate, and the lower wall of the pressure plate is in the same horizontal plane as the lower wall of the pressure plate, one end of the pressure plate is located on the rear side of the pressure plate, the infrared rangefinder is fixedly arranged in the middle of the lower wall of one end of the pressure plate, and the camera is fixedly arranged on the lower wall of one end of the pressure plate and close to the infrared rangefinder.

[0007] Preferably, the expansion support structure includes a slide, a first motor, a screw, a pair of movable seats, a pair of second motors, a pair of force arms, a pair of pressure sensors and a second infrared rangefinder; the slide is fixedly arranged at the left end of the base, and both ends of the slide pass through the carrier plate, the slide corresponds to and fits with one of the pairs of positioning grooves, the first motor is fixedly arranged on the left end of the slide, both ends of the screw are movably embedded in the left and right side walls of the slide, and one end of the screw is connected to the driving end of the first motor, one end of the pair of movable seats is movably inserted in the two ends of the slide, and the middle part of one end of the movable seat is provided with a reverse spiral hole, a pair of One end of the moving seat is respectively screwed onto the screw rod, the other end of the pair of moving seats is a cavity structure, and a flipping opening is opened in the middle of the other end of the moving seat, a pair of the second motors are respectively fixedly arranged in the other end of the moving seat, and the second motor driving end movably passes through the flipping opening, one end of the pair of force-bearing arms are respectively movably inserted into the flipping opening, and one end of the force-bearing arm is fixedly sleeved on the second motor driving end, a pair of pressure sensors are respectively fixedly arranged on the side wall of the other end of the force-bearing arm and are symmetrical in the opposite direction, and the second infrared rangefinder is fixedly embedded in the side wall of the other end of one of the force-bearing arms, and the second infrared rangefinder is opposite to the other force-bearing arm.

[0008] Preferably, the two pairs of positioning structures are respectively fixedly arranged on the upper wall of the left end of the base, and the positioning structures respectively correspond to the positioning grooves; the positioning structure includes a second electric slide rail, a lifting frame, a positioning claw and a pair of second springs; the second electric slide rail is fixedly arranged on the upper wall of the left end of the base, and the second electric slide rail corresponds to one of the positioning grooves in an alternating manner, the lifting frame is concave, the lifting frame is fixedly arranged on the second electric slide rail, and the lifting frame moves back and forth, one end of the positioning claw movably passes through the middle of the top end of the lifting frame, one end of a pair of second springs is fixedly arranged on the inner upper wall of the bottom end of the lifting frame, and the second springs are located between the two ends of the lifting frame, and the other ends of a pair of second springs are respectively attached to the lower wall of one end of the positioning claw.

[0009] Preferably, the other end of the positioning claw movably passes through the positioning groove.

[0010] Preferably, the other end of the force-bearing arm movably passes through one of the pair of positioning grooves.

[0011] Preferably, the angle between the second electric slide rail and the slide seat is 60 degrees, and the relative angle between the positioning grooves is 60 degrees.

[0012] A method for detecting a sealing ring comprises the following steps: Step 1: The equidistant arrangement of the sealing ring to be inspected is achieved by the positioning structure and the expansion structure, so that the sealing ring to be inspected can be centrally positioned and limited, and then the thickness is measured by means of the first infrared rangefinder in the pressing structure, and the light spot of the first infrared rangefinder is driven to move by the first electric slide rail, and the inner wall diameter and wall thickness of the sealing ring are measured by means of camera imaging and the moving stroke of the first electric slide rail, and the outer wall diameter data is obtained, and then the inner wall circumference of the sealing ring is obtained according to the inner wall radius of the sealing ring; Step 2: Use the force arm in the expansion structure to enter the inner wall of the sealing ring and expand it in the opposite direction, stretch the sealing ring to a distance of half the circumference, and extend it for a certain distance to obtain the force value of the pressure sensor, increase the expansion distance, support it for a certain period of time, and then reset it to the expansion position of the initial force value to detect the change in the force value. If the value becomes smaller, it proves that the sealing ring has been deformed, or the force arm distance is detected by the second infrared rangefinder. When the force arm distance becomes farther and the same force value is obtained, it can also prove that deformation has occurred, or when the sealing ring is positioned, the sealing ring is pressurized by the downward pressure structure, and then the shape change is automatically detected by camera imaging or the thickness change after pressing is detected by the first infrared rangefinder to obtain the result.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The positioning structure and the expansion structure are used to achieve equidistant arrangement of the circumference and an interval of 30 degrees. The tested sealing ring can be accurately centered and limited by clamping from six directions. This multi-directional collaborative positioning method can effectively reduce the offset and shaking of the sealing ring during the test and ensure the accuracy of the test results.

[0014] 2. The method of equidistant arrangement and multi-directional clamping is suitable for rubber sealing rings of different specifications and sizes. As long as the size of the sealing ring is within a certain range, accurate positioning and clamping can be achieved by adjusting the parameters of the positioning structure and the expansion structure, which improves the versatility of the test solution. For example, for sealing rings with different inner and outer diameters, testing can be carried out by appropriately adjusting the size of the expansion structure and the positioning structure.

[0015] 3. The thickness of the sealing ring can be measured with the help of the first infrared rangefinder in the downward pressure structure. The light point of the first infrared rangefinder is moved by the first electric slide rail, and the inner wall diameter and wall thickness of the sealing ring can be measured by combining the camera imaging and the moving stroke of the first electric slide rail, and then the outer wall diameter data can be obtained. This multi-dimensional measurement method can comprehensively obtain the key size information of the sealing ring and provide rich data support for evaluating the quality of the sealing ring.

[0016] 4. The force-bearing arm in the expansion structure enters the inner wall of the sealing ring and expands and moves in the opposite direction, stretching the sealing ring and recording the force value of the pressure sensor. The deformation of the sealing ring is determined according to the change in the expansion distance and the force value. On the other hand, the change in the distance of the force-bearing arm is detected by the second infrared rangefinder. When the distance of the force-bearing arm becomes farther and the same force value is obtained, it can also be proved that the sealing ring is deformed. In addition, the sealing ring can be pressurized by the downward pressure structure, and then the shape change is automatically detected by camera imaging or the thickness change after pressing is detected by the first infrared rangefinder to obtain the result. Multiple detection methods confirm each other, which improves the reliability of deformation detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly structure of the present invention; Figure 2 Show the structural diagram for the main structure; Figure 3 It is a schematic diagram of the split structure of the downward pressure structure; Figure 4 It is a schematic diagram of the assembly structure of the downward pressure structure; Figure 5 It is a schematic diagram of the split structure of the expansion support structure; Figure 6 A schematic diagram of the structure splitting for positioning structure; Figure 7 It is a schematic diagram of the assembly structure of the expansion support structure; Figure 8 for Figure 5 A local enlarged view of point A in FIG. Fig. 9 for Figure 6 A partial enlarged view of point B in FIG.

[0018] In the figure: 1. main structure, 11. base, 12. mounting frame, 13. support arm, 14. bearing plate, 15. controller, 2. pressing structure, 21. first hydraulic cylinder, 22. pressure plate, 23. telescopic rod, 24. first spring, 25. first electric slide rail, 26. pressure plate, 27. first infrared rangefinder, 28. camera, 3. expansion structure, 31. slide seat, 32. first motor, 33. screw rod, 34. moving seat, 35. second motor, 36. force arm, 37. pressure sensor, 38. second infrared rangefinder, 4. positioning structure, 41. second electric slide rail, 42. lifting frame, 43. positioning claw, 44. second spring, 5. positioning groove, 6. mounting groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-Figure 9 As shown, the present invention provides a technical solution: a sealing ring detection device, comprising a main structure 1, a downward pressure structure 2, an expansion structure 3 and two pairs of positioning structures 4; the downward pressure structure 2 is fixedly arranged on the main structure 1, the expansion structure 3 is fixedly arranged on the main structure 1 and is located below the downward pressure structure 2, the two pairs of positioning structures 4 are equidistantly arranged on the main structure 1, and the positioning structures 4 are respectively located on both sides of the expansion structure 3; the main structure 1 is used to control and carry the sealing ring to be tested, the positioning structure 4 is used to position the sealing ring in the center, and plays a positioning and limiting role, the downward pressure structure 2 is used to perform a downward pressure test on the positioned sealing ring, and the expansion structure 3 is used to perform a tensile test on the sealing ring.

[0021] More specifically, Figure 2As shown, the main structure 1 includes a base 11, a mounting frame 12, a pair of support arms 13, a carrying plate 14 and a controller 15; the mounting frame 12 is L-shaped, one end of the mounting frame 12 is fixedly arranged on the middle of the upper wall of the right end of the base 11, and the other end of the mounting frame 12 is located above the left end of the base 11. One ends of a pair of support arms 13 are symmetrically arranged on the left side wall of one end of the mounting frame 12, and the carrying plate 14 is circular, and three pairs of positioning grooves 5 are equidistantly opened through the carrying plate 14, one pair of positioning grooves 5 is parallel to the base 11, and the carrying plate 14 is fixedly arranged on the other end of the pair of support arms 13, and the carrying plate 14 is located above the base 11, and the other end of the support arm 13 is located on the front and rear sides of one of the positioning grooves 5. The controller 15 is fixedly arranged on the upper wall of the other end of the mounting frame 12, supported by the base 11, and the carrying plate 14 is fixed to a certain height by the support arm 13, and the tested sealing ring is placed on the carrying plate 14, and the device is driven by the controller 15.

[0022] More specifically, Figure 3 and Figure 4 As shown, the pressing structure 2 includes a first hydraulic cylinder 21, a pressure plate 22, a pair of telescopic rods 23, a pair of first springs 24, a first electric slide rail 25, a pressure plate 26, a first infrared rangefinder 27 and a camera 28; one end of the first hydraulic cylinder 21 is fixedly passed through the upper wall of the other end of the mounting frame 12 and is located on the center line, the pressure plate 22 is circular and the lower wall of the pressure plate 22 is penetrated by a mounting groove 6, the mounting groove 6 is perpendicular to the support arm 13, the pressure plate 22 is fixedly arranged on the telescopic end of the first hydraulic cylinder 21, and the pressure plate 22 is located below the other end of the mounting frame 12, the pressure plate 22 is located above the bearing plate 14, and the pressure plate 22 corresponds to the bearing plate 14, one end of a pair of telescopic rods 23 respectively movably passes through the upper wall of the mounting frame 12 and is fixedly connected to the pressure plate 22, the pair of telescopic rods 23 are located on the left and right sides of the first hydraulic cylinder 21, the pair of telescopic rods 23 are both T-shaped rod bodies, and a pair of first springs 24 are respectively movably sleeved on the other end of the telescopic rod 23 and are located above the other end of the mounting frame 12 The first electric slide rail 25 is fixedly embedded in the rear end of the installation groove 6, and the pressure plate 26 is fixedly arranged on the first electric slide rail 25 near one end, and the pressure plate 26 is movably embedded in the installation groove 6. The length of the pressure plate 26 is greater than the diameter of the pressure plate 22, and the lower wall of the pressure plate 26 is at the same horizontal plane as the lower wall of the pressure plate 22. One end of the pressure plate 26 is located at the rear side of the pressure plate 22. The infrared rangefinder is fixedly arranged in the middle of the lower wall of one end of the pressure plate 26, and the camera 28 is fixedly arranged on the lower wall of one end of the pressure plate 26 and close to the infrared rangefinder; the pressure plate 26 is driven to rise and fall by the first hydraulic cylinder 21, and the pressure plate 22 is reset and raised with the help of the first spring 24 on the telescopic rod 23. The pressure plate 26 is driven to move and adjust the positions of the first infrared rangefinder 27 and the camera 28 by the first electric slide rail 25, and is used according to sealing rings of different diameters. The inner wall of the sealing ring is positioned and measured by the first infrared rangefinder 27 and the thickness of the sealing ring is measured, and the shape change after pressure is detected by imaging with the camera 28.

[0023] More specifically, Figure 5 , Figure 7 and Figure 8 As shown, the expansion structure 3 includes a slide 31, a first motor 32, a screw 33, a pair of moving seats 34, a pair of second motors 35, a pair of force arms 36, a pair of pressure sensors 37 and a second infrared rangefinder 38; the slide 31 is fixedly arranged at the left end of the base 11, and both ends of the slide 31 pass through the carrier plate 14, the slide 31 corresponds to one of the pair of positioning grooves 5, the first motor 32 is fixedly arranged on the left end of the slide 31, both ends of the screw 33 are movably embedded in the left and right side walls of the slide 31, and one end of the screw 33 is connected to the driving end of the first motor 32, one end of a pair of moving seats 34 is movably inserted in both ends of the slide 31, and the middle part of one end of the moving seats 34 is provided with reverse spiral holes, one end of a pair of moving seats 34 is respectively screwed on the screw 33, the other end of the pair of moving seats 34 is a cavity structure, and the middle part of the other end of the moving seats 34 is provided with a flipping mouth, a pair of second motors 35 They are respectively fixed in the other end of the movable seat 34, and the driving end of the second motor 35 movably passes through the flipping mouth, one end of a pair of force arms 36 are respectively movably inserted in the flipping mouth, and one end of the force arm 36 is fixedly sleeved on the driving end of the second motor 35, a pair of pressure sensors 37 are respectively fixed on the side walls of the other ends of the force arms 36 and are symmetrical in reverse, and the second infrared rangefinder 38 is fixedly embedded in the side wall of the other end of one of the force arms 36, and the second infrared rangefinder 38 is opposite to the other force arm 36; the first motor 32 drives the screw 33 to rotate in the slide seat 31, and drives the movable seat 34 with a reverse spiral hole to move relative or toward each other to adjust the distance, and the second motor 35 drives the force arm 36 to flip, so that the force arm 36 can be located inside or outside the sealing ring, the pressure sensor 37 is used to test the tensile force of the sealing ring, and the second infrared rangefinder 38 is used to measure the distance between the two force arms 36.

[0024] More specifically, Figure 6 and Fig. 9 As shown, two pairs of positioning structures 4 are respectively fixedly disposed on the upper wall of the left end of the base 11, and the positioning structures 4 correspond to the positioning grooves 5 respectively; The positioning structure 4 includes a second electric slide rail 41, a lifting frame 42, a positioning claw 43 and a pair of second springs 44; The second electric slide rail 41 is fixedly arranged on the upper wall of the left end of the base 11, and the second electric slide rail 41 corresponds to one of the positioning grooves 5 in an alternating manner. The lifting frame 42 is concave, and the lifting frame 42 is fixedly arranged on the second electric slide rail 41, and the lifting frame 42 moves forward and backward. One end of the positioning claw 43 movably passes through the middle of the top end of the lifting frame 42, and one end of a pair of second springs 44 is fixedly arranged on the inner upper wall of the bottom end of the lifting frame 42, and the second spring 44 is located between the two ends of the lifting frame 42, and the other ends of the pair of second springs 44 are respectively attached to the lower wall of one end of the positioning claw 43; the lifting frame 42 is driven to move by the second electric slide rail 41, so as to realize that the positioning claw 43 is driven to move in the positioning groove 5 to position and limit the sealing ring, and the positioning claw 43 can be lifted and lowered by force in the lifting frame 42 and compress the second spring 44, which is used to fit the sealing ring under pressure to maintain the limit.

[0025] As a preferred solution, the other end of the positioning claw 43 is movable through the positioning groove 5 to achieve centering of the sealing ring according to design requirements.

[0026] As a preferred solution, the other end of the force-bearing arm 36 movably passes through one of the pair of positioning grooves 5, which is used for designing the positioning of the sealing ring and the expansion and pulling detection.

[0027] As a preferred solution, the angle between the second electric slide rail 41 and the slide seat 31 is 60 degrees, and the relative angle of the positioning groove 5 is 60 degrees, which is designed for equidistant installation and enables the sealing ring to be effectively centered for easy testing.

[0028] The working principle steps are as follows: When testing the sealing ring, the sealing ring is placed in the middle of the upper wall of the carrier plate 14 supported at a certain height by the support arm 13, and the expansion structure 3 and the positioning structure 4 of the device are driven by the controller 15 to relatively move the positioning claw 43 and the force-bearing arm 36; that is, the first motor 32 in the expansion structure 3 is driven to drive the screw 33 to rotate in the slide seat 31, so that the two moving seats 34 are forced to move relative to each other, and the force-bearing arm 36 is driven to relatively move; at the same time, the second electric slide rail 41 in the positioning structure 4 is driven to relatively move the corresponding positioning claws 43, so as to clamp and center the sealing ring from six directions of the carrier plate 14; After the sealing ring is positioned, the force-bearing arm 36 is relatively far away from the sealing ring, and then the second motor 35 in the moving seat 34 is driven to drive the force-bearing arm 36 to flip into the positioning groove 5 or be located under the carrier plate 14, and at the same time, the positioning claw 43 is separated from the sealing ring, thereby driving the pressing structure 2 to apply pressure to test the deformation; Before testing the pressing structure 2, the second electric slide rail 41 is first controlled to drive the pressing plate 26 to slide, and the camera 28 is aimed at the sealing ring for imaging. At the same time, the second infrared rangefinder 38 is used to illuminate the upper wall of the sealing ring to measure the thickness of the sealing ring at this time. At the same time, the irradiation point of the second infrared rangefinder 38 is imaged with the camera 28, and the irradiation point of the second infrared rangefinder 38 is positioned at the edge of the inner wall of the sealing ring. Then, according to the moving stroke distance of the second electric slide rail 41, the inner and outer wall diameters of the sealing ring are measured, and then the radius and wall thickness data of the sealing ring are obtained; The first hydraulic cylinder 21 in the pressing structure 2 is driven to drive the pressure plate 22 to move downward with the help of the telescopic rod 23. As the pressure plate 22 descends, the first spring 24 is compressed, and the pressure plate 22 descends to press the sealing ring. At the same time, the positioning claw 43 is forced to move downward on the lifting frame 42 and compress the second spring 44. When the pressure plate 22 descends, the lower wall of the pressure plate 22 applies pressure to the installation groove 6 through the pressure plate 26 to block and maintain the plane. After the pressure is applied, the pressure plate 22 is reset, and the positioning claw 43 is lifted by the force of the second spring 44. Then the second electric slide rail 41 is driven to drive the pressure plate 26 to move in the installation groove 6, so as to drive the camera 28 and the first infrared rangefinder 27 to measure and image the sealing ring. When the seal ring is deformed after pressure is applied, the image of the seal ring will be different from the original image, and the height of the seal ring measured by the first infrared rangefinder 27 will also change. The first infrared rangefinder 27 can also be used to measure the inner wall diameter and outer wall diameter of the seal ring again to determine whether the deformation has changed. When testing is performed through the expansion structure 3, after the sealing ring is positioned in the center by the positioning claw 43, the force-bearing arm 36 is flipped to the bottom of the sealing ring, and then the force-bearing arm 36 is relatively moved into the inner ring of the sealing ring, and the force-bearing arm 36 is flipped and reset to pass through the positioning groove 5; then, according to the radius measurement data of the inner wall of the sealing ring, the circumference length of the inner wall of the sealing ring is obtained, and then the value of half of the circumference is obtained; According to the general value of the circumference, the force-bearing arm 36 is moved to slide in the opposite direction, and the sealing ring is expanded and stretched by the force-bearing arm 36; the relative distance between the two force-bearing arms 36 is measured by the second infrared rangefinder 38. Since the width (or thickness) of the force-bearing arm 36 is unchanged, when the distance between the opposite side walls of the force-bearing arm 36 reaches the distance of half the value of the circumference, the pressure sensor 37 on the force-bearing arm 36 is effectively in contact with the sealing ring to receive force, and then the corresponding force value is obtained and displayed on the controller 15; The force value at this time is recorded, or the force arm 36 is slightly moved over a large or small distance to record the force arm 36 spacing C1 and the force value D1 at this time, and then the force arm 36 is expanded to a certain spacing, maintained for a certain time, and then the force arm 36 is relatively moved to the originally measured C1 spacing, and a new force value D2 is obtained. If the D2 value is less than the D1 value, it proves that the sealing ring is deformed under force and stretched.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A sealing ring detection device, characterized in that: The invention comprises a main structure (1), a downward pressing structure (2), an expansion structure (3) and two pairs of positioning structures (4); the downward pressing structure (2) is fixedly arranged on the main structure (1), the expansion structure (3) is fixedly arranged on the main structure (1) and is located below the downward pressing structure (2), the two pairs of positioning structures (4) are respectively arranged on the main structure (1) at equal distances, and the positioning structures (4) are respectively located on both sides of the expansion structure (3); the main structure (1) is used to control and carry the sealing ring to be tested, the positioning structure (4) is used to position the sealing ring at the center, the downward pressing structure (2) is used to perform downward pressing test on the sealing ring after positioning, and the expansion structure (3) is used to perform tensile test on the sealing ring; The main structure (1) comprises a base (11), a mounting frame (12), a pair of support arms (13), a carrying plate (14) and a controller (15); The mounting frame (12) is L-shaped, one end of the mounting frame (12) is fixedly arranged at the middle of the upper wall of the right end of the base (11), the other end of the mounting frame (12) is located above the left end of the base (11), one end of a pair of support arms (13) are symmetrically arranged on the left side wall of one end of the mounting frame (12), the carrying plate (14) is circular, and the carrying plate (14) is equidistantly penetrated with three pairs of positioning grooves (5), one pair of the positioning grooves (5) is parallel to the base (11), the carrying plate (14) is fixedly arranged on the other end of the pair of support arms (13), and the carrying plate (14) is located above the base (11), the other end of the support arm (13) is located at the front and rear sides of one of the positioning grooves (5), and the controller (15) is fixedly arranged on the upper wall of the other end of the mounting frame (12).

2. A sealing ring detection device according to claim 1, characterized in that: The pressing structure (2) comprises a first hydraulic cylinder (21), a pressing plate (22), a pair of telescopic rods (23), a pair of first springs (24), a first electric slide rail (25), a pressing plate (26), a first infrared rangefinder (27) and a camera (28); One end of the first hydraulic cylinder (21) is fixedly passed through the upper wall of the other end of the mounting frame (12) and is located on the center line; the pressure plate (22) is circular and a mounting groove (6) is formed through the lower wall of the pressure plate (22); the mounting groove (6) is perpendicular to the support arm (13); the pressure plate (22) is fixedly arranged on the telescopic end of the first hydraulic cylinder (21), and the pressure plate (22) is located below the other end of the mounting frame (12); the pressure plate (22) is located above the bearing plate (14), and the pressure plate (22) corresponds to the bearing plate (14); one end of a pair of telescopic rods (23) respectively movably passes through the upper wall of the mounting frame (12) and is fixedly connected to the pressure plate (22); the pair of telescopic rods (23) are located on the left and right sides of the first hydraulic cylinder (21); and the pair of telescopic rods (23) are located on the left and right sides of the first hydraulic cylinder (21); 3) are all T-shaped rod bodies, a pair of the first springs (24) are movably mounted on the other end of the telescopic rod (23) and are located above the other end of the mounting frame (12), the first electric slide rail (25) is fixedly mounted in the rear end of the mounting groove (6), the pressing plate (26) is fixedly arranged on the first electric slide rail (25) near one end, and the pressing plate (26) is movably mounted in the mounting groove (6), the length of the pressing plate (26) is greater than the diameter of the pressing plate (22), and the lower wall of the pressing plate (26) and the lower wall of the pressing plate (22) are in the same horizontal plane, one end of the pressing plate (26) is located at the rear side of the pressing plate (22), the infrared rangefinder is fixedly arranged in the middle of the lower wall of one end of the pressing plate (26), and the camera (28) is fixedly arranged on the lower wall of one end of the pressing plate (26) and is close to the infrared rangefinder.

3. A sealing ring detection device according to claim 2, characterized in that: The expansion support structure (3) comprises a sliding seat (31), a first motor (32), a screw rod (33), a pair of moving seats (34), a pair of second motors (35), a pair of force-bearing arms (36), a pair of pressure sensors (37) and a second infrared rangefinder (38); The slide seat (31) is fixedly arranged at the left end of the base (11), and both ends of the slide seat (31) pass through the carrier plate (14). The slide seat (31) corresponds to and fits with one of the pair of positioning grooves (5). The first motor (32) is fixedly arranged on the left end of the slide seat (31). Both ends of the screw rod (33) are movably embedded in the left and right side walls of the slide seat (31), and one end of the screw rod (33) is connected to the driving end of the first motor (32). One end of a pair of movable seats (34) is movably inserted in the two ends of the slide seat (31), and the middle part of one end of the movable seats (34) is provided with a reverse spiral hole. One end of the pair of movable seats (34) is respectively screwed on the screw rod (33). The pair of movable seats (34) ) and the other end of each of the movable seats (34) is a hollow structure, and a flipping opening is provided in the middle of the other end of the movable seat (34). A pair of the second motors (35) are respectively fixedly arranged in the other end of the movable seat (34), and the driving end of the second motor (35) movably passes through the flipping opening. One end of a pair of the force-bearing arms (36) are respectively movably inserted in the flipping opening, and one end of the force-bearing arms (36) is fixedly sleeved on the driving end of the second motor (35). A pair of the pressure sensors (37) are respectively fixedly arranged on the side walls of the other ends of the force-bearing arms (36) and are symmetrical in the opposite direction. The second infrared rangefinder (38) is fixedly embedded in the side wall of the other end of one of the force-bearing arms (36), and the second infrared rangefinder (38) is opposite to the other force-bearing arm (36).

4. A sealing ring detection device according to claim 3, characterized in that: The two pairs of positioning structures (4) are respectively fixedly arranged on the upper wall of the left end of the base (11), and the positioning structures (4) respectively correspond to the positioning grooves (5); The positioning structure (4) comprises a second electric slide rail (41), a lifting frame (42), a positioning claw (43) and a pair of second springs (44); The second electric slide rail (41) is fixedly arranged on the upper wall of the left end of the base (11), and the second electric slide rail (41) corresponds to one of the positioning grooves (5) in an alternating manner. The lifting frame (42) is concave, and the lifting frame (42) is fixedly arranged on the second electric slide rail (41). The lifting frame (42) moves forward and backward. One end of the positioning claw (43) movably passes through the middle of the top end of the lifting frame (42). One end of a pair of second springs (44) is fixedly arranged on the inner upper wall of the bottom end of the lifting frame (42), and the second springs (44) are located between the two ends of the lifting frame (42). The other ends of the pair of second springs (44) are respectively attached to the lower wall of one end of the positioning claw (43).

5. A sealing ring detection device according to claim 4, characterized in that: The other end of the positioning claw (43) movably penetrates the positioning groove (5).

6. A sealing ring detection device according to claim 5, characterized in that: The other end of the force-bearing arm (36) movably passes through one of the pair of positioning grooves (5).

7. A sealing ring detection device according to claim 6, characterized in that: The included angle between the second electric slide rail (41) and the slide seat (31) is 60 degrees, and the relative included angle of the positioning groove (5) is 60 degrees.

8. A method for detecting a sealing ring, applied to a sealing ring detection device according to claim 7, characterized in that: The following steps are involved: Step 1: The equidistant arrangement of the sealing ring to be inspected is achieved by the positioning structure (4) and the expansion structure (3), so that the sealing ring to be inspected can be centrally positioned and limited, and then the thickness is measured by means of the first infrared rangefinder (27) in the pressing structure (2), and the light spot of the first infrared rangefinder (27) is driven to move by the first electric slide rail (25), and the inner wall diameter and wall thickness of the sealing ring are measured by means of imaging of the camera (28) and the moving stroke of the first electric slide rail (25), and the outer wall diameter data is obtained, and then the inner wall circumference of the sealing ring is obtained according to the inner wall radius of the sealing ring; Step 2: Using the force arm (36) in the expansion structure (3) to enter the inner wall of the sealing ring and expand and move in the opposite direction, the sealing ring is stretched to a distance of half the circumference, and after extending a certain distance to obtain the force value through the pressure sensor (37), the expansion distance is increased, and after supporting for a certain period of time, it is reset to the expansion position of the initial force value to detect the change in the force value. If the value becomes smaller, it proves that the sealing ring has deformed, or the distance of the force arm (36) is detected by the second infrared rangefinder (38). When the distance of the force arm (36) becomes farther and the same force value is obtained, it can also prove that deformation has occurred. Or, after the sealing ring is positioned, the sealing ring is pressed by the downward pressing structure (2), and then the shape change is automatically detected by imaging with the camera (28) or the thickness change after pressing is detected by the first infrared rangefinder (27) to obtain the result.

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