Testing device

Abstract

The utility model discloses a test device used for detecting the bending resistance of an insulator, the test device comprises a rack, a first tool clamp and a camera system, the rack comprises a base and two supporting frames arranged on the base at intervals in the length direction of the base, the first tool clamp is arranged on one supporting frame and used for installing the insulator, and the camera system is arranged on the other supporting frame. The insulator is arranged in the length direction of the base, and the camera system is movably arranged on the rack and used for detecting the creep deformation condition of the insulator in the bending resistance test in real time. The test device can be used in the anti-bending test process of the insulator, the creep condition of the insulator in the anti-bending test can be detected by arranging the camera system, and the local strain effect of the insulator in a large range can also be detected.

Description

Technical Field

[0001] The present application relates to the technical field of insulator bending resistance test equipment, and more specifically to a test device. Background Art

[0002] In the existing bending test of insulators, strain gauges are usually pasted on the outer surface of the insulating tube to measure the strain of the insulator under different bending stresses. It is impossible to detect the subtle strain of the insulator during the bending stress change, and creep equipment is needed. Existing creep equipment is usually used for tensile, compression endurance, bending creep, relaxation tests, low-cycle fatigue and creep fatigue tests of metal and non-metallic materials. The detection stroke is short. For products such as insulators that are long in length, large creep equipment is required, which is too expensive. In addition, the existing creep equipment cannot be carried out stably for a long time during the test, and has great limitations. Therefore, there is a lack of equipment that can be used to detect the creep of insulators in bending tests. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the present application is to provide a test device that can be used in the bending test process of insulators. By setting up a camera system, it is possible to detect the creep condition of the insulator during the bending test, and can also detect the local strain effect of the insulator over a large range.

[0004] To achieve the above-mentioned purpose, the technical means adopted in this application are as follows: a test device is provided for detecting the bending performance of an insulator, the test device comprising: a frame, comprising a base and two support frames arranged on the base at intervals along the length direction of the base; a first tooling fixture, arranged on one of the support frames, for installing an insulator, the insulator being arranged along the length direction of the base; a camera system, movably arranged on the frame, for real-time detection of the creep condition of the insulator during the bending test.

[0005] Wherein, the relative position between the two support frames is adjustable.

[0006] The frame further comprises a top crossbeam, which is arranged along the length direction of the base and fixed to the tops of the two support frames.

[0007] Among them, the camera system includes an upper camera system and a lower camera system. The upper camera system is fixed under the top beam and is used to detect the bending creep condition of the top of the insulator in real time. The lower camera system is fixed above the base and is used to detect the bending creep condition of the bottom of the insulator in real time.

[0008] Among them, the upper camera system includes a first connecting plate and an upper camera fixed to the first connecting plate, and a first groove extending along the length direction of the top beam is provided at the bottom of the top beam, and the first connecting plate is movably fixed in the first groove.

[0009] Among them, the lower camera system includes a movable bracket and a lower camera fixed to the movable bracket. A second groove extending along the length direction of the base is provided on the base, and the movable bracket is movably fixed in the second groove.

[0010] Among them, the mobile bracket includes a connecting seat and a moving plate, the base includes two bottom beams arranged at intervals along the width direction of the base, a second groove is arranged on the bottom beam, and there are two connecting seats. The two connecting seats are respectively movably fixed in the second grooves of the two bottom beams. The moving plate is located between the two connecting seats, and the lower camera is installed on the moving plate.

[0011] Among them, the connecting seat includes a second connecting plate and a third connecting plate, the third connecting plate is vertically fixed on the second connecting plate, the second connecting plate is used to be fixed with the second groove, the third connecting plate is provided with a through hole, and the movable plate is provided with an arc groove. The through hole is fixedly connected to any position of the arc groove, so that the movable plate can be fixedly connected to the connecting seat in an adjustable position.

[0012] The test device also includes a hydraulic system, which includes a hydraulic motor and a hydraulic top. The hydraulic motor is arranged outside the frame, and the hydraulic top is arranged on another supporting frame to provide bending stress to the insulator.

[0013] A second fixture is fixed to the end of the insulator that is not fixed to the first fixture, a support rod is provided on the plate surface of the second fixture away from the insulator, and the hydraulic top abuts against the support rod to apply bending stress to the insulator.

[0014] The beneficial effects of the present application are as follows: the bending test device of the present application is upgraded and modified from the traditional bending test device. A camera system is added to the existing frame, which can detect the creep condition on the insulator in real time, overcoming the large strain fluctuation and inaccurate measurement results caused by the traditional placement of strain gauges, and can perform high-quality and long-term strain detection. By optimizing the way the camera system is installed, the measurement position and measurement direction of the three-dimensional camera system can be adjusted to adapt to all specifications of insulator bending creep tests. And by adding a hydraulic system, the existing bending test process can be optimized to achieve the stability of the bending force and the adjustability of the tonnage. At the same time, the test device also has the ability to resist environmental interference during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the test device 100 of the present application;

[0016] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0017] Figure 3 yes Figure 1The enlarged schematic diagram of point B in the middle;

[0018] Figure 4 is a schematic diagram of the structure of the camera system 150 under the present application;

[0019] Figure 5 is a side plan view schematic diagram of the camera system 150 of the present application. DETAILED DESCRIPTION

[0020] Upon request, specific embodiments of the present application will be disclosed herein. However, it should be understood that the embodiments disclosed herein are merely typical examples of the present application, which may be embodied in various forms. Therefore, the specific details disclosed herein are not considered to be restrictive, but only as a basis for the claims and as a representative basis for teaching those skilled in the art to apply the present application in various ways in practice in any appropriate manner, including using the various features disclosed herein and combining features that may not be explicitly disclosed herein.

[0021] See also Figure 1 The present application provides a test device 100 for detecting the bending performance of an insulator 20. The test device 100 includes a frame 110, a first fixture 121 and a camera system. The first fixture 121 is disposed on the frame 110 and is used to install the insulator 20. The camera system is movably disposed on the frame 110 and is used to detect the creep of the insulator 20 in the bending test in real time. The frame 110 includes a base 111, two support frames 112 and a top crossbeam 113. The two support frames 112 are disposed on the base 111 at intervals along the length direction of the base 111. The top crossbeam 113 is fixed to the top of the two support frames 112, and the top crossbeam 113 is also disposed along the length direction of the base 111. The base 111 includes two bottom crossbeams 1111 disposed at intervals along the width direction of the base 111. The support frames 112 are simultaneously connected to the two bottom crossbeams 1111. The length direction of the base 111 and the width direction of the base 111 are both located in the same horizontal plane, and the length direction of the base 111 is perpendicular to the width direction of the base 111 .

[0022] The first fixture 121 is a plate-shaped part, that is, the first fixture 121 is a first fixture plate 121, which is fixedly installed on one of the support frames 112. The first fixture plate 121 is provided with a connection hole that matches the flange at one end of the insulator 20, which is used to install the insulator 20, so that the insulator 20 is arranged along the length direction of the base 111, that is, the axis of the insulator 20 is parallel to the horizontal direction. The support frame 112 connected to the first fixture 121 is defined as the first support frame 1121, and the other support frame 112 is defined as the second support frame 1122. Among them, the first fixture 121 is fixedly connected to the side of the first support frame 1121 facing the second support frame 1122.

[0023] The first support frame 1121 includes a bottom plate 1123 and a support plate 1124. The bottom plate 1123 is fixedly connected to two bottom cross beams 1111 arranged at intervals. The support plate 1124 is vertically fixed to the plate surface of the bottom plate 1123 away from the bottom cross beam 1111. The structure of the second support frame 1122 is the same as that of the first support frame 1121. The second support frame 1122 is arranged opposite to the first support frame 1121, and the specific details are not repeated. A plurality of mounting holes are arranged on the bottom cross beam 1111 along the length direction of the base 111. The bottom plate 1123 of the first support frame 1121 and the bottom plate 1123 of the second support frame 1122 are selectively matched and connected with one of the mounting holes, so that the relative position between the first support frame 1121 and the second support frame 1122 can be adjusted. That is, according to the insulator 20 of different lengths, the distance between the first support frame 1121 and the second support frame 1122 is adjusted to facilitate the application of bending stress to the end of the insulator 20 away from the first fixture 121.

[0024] Combination Figure 2 As shown, the test device 100 also includes a second fixture 122, and the second fixture 122 includes a second fixture plate 1221 and a support rod 1222. The second fixture plate 1221 is provided with a connection hole, and the flange at the other end of the insulator 20 is matched and connected with the connection hole on the second fixture plate 1221. The support rod 1222 is arranged on the side of the second fixture plate 1221 away from the insulator 20. In one embodiment, the support rod 1222 is fixed to the second fixture plate 1221 by threaded connection, which is convenient for replacing the support rod 1222 after it is damaged. In other embodiments, the support rod and the second fixture plate can also be fixed by welding, as long as the connection between the support rod and the second fixture plate can be ensured to be stable, and there is no limitation here.

[0025] Continue reading Figure 1The test device 100 includes a hydraulic system 130, which includes a hydraulic motor (not shown) and a hydraulic jack 131. The hydraulic motor is arranged outside the frame 110 and is used to provide power to the hydraulic jack 131. The hydraulic jack 131 is arranged on the base 111. The hydraulic system 130 also includes a mounting plate 132. The hydraulic jack 131 is fixedly connected to the mounting plate 132. The mounting plate 132 is also provided with a connecting hole. After the connecting hole on the mounting plate 132 is matched with the mounting hole on the bottom plate 1123 of the second support frame 1122, the hydraulic jack 131 is fixedly connected to the second support frame 1122, that is, the hydraulic jack 131 is fixedly connected to the base 111. The hydraulic ejector 131 includes an ejection part 1311 and a hydraulic part 1312. The hydraulic part 1312 is a cylindrical hollow structure. The axis of the hydraulic part 1312 is parallel to the vertical direction. The ejection part 1311 is a long rod. The ejection part 1311 is movably arranged in the cylindrical inner cavity of the hydraulic part 1312. The hydraulic motor drives the ejection part 1311 to move in the hydraulic part 1312 along the vertical direction.

[0026] When one end of the insulator 20 is fixed on the first fixture 121, the other end of the insulator 20 abuts against the hydraulic system 130 through the second fixture 122. Specifically, the ejection part 1311 abuts against the support rod 1222 on the second fixture 122, and the hydraulic motor drives the ejection part 1311 to move vertically upward. The ejection part 1311 drives the support rod 1222 to make the insulator 20 make a vertical upward circular motion around the connection between it and the first fixture 121, thereby applying bending stress to the insulator 20. Since the bending creep test needs to be carried out for a long time, the setting of the hydraulic system 130 can greatly save manpower. Hydraulic pressure is applied to the end of the insulator 20, wherein the end of the ejection part 1311 adopts a cylindrical surface, and the support rod 1222 adopts a cylindrical rod body, on which a concave surface is provided to adapt to the cylindrical surface on the ejection part 1311. In combination with the hydraulic force, the pressure of the hydraulic system 130 is stable, ensuring the continuous progress of the bending test, and at the same time ensuring the stability of the bending force and the adjustability of the tonnage.

[0027] Continue reading Figure 1 The camera system includes an upper camera system 140 and a lower camera system 150. The upper camera system 140 is fixed below the top beam 113 and is used to detect the bending creep condition of the top of the insulator 20 in real time. The lower camera system 150 is fixed above the base 111 and is used to detect the bending creep condition of the bottom of the insulator 20 in real time.

[0028] Combination Figure 3As shown, the upper camera system 140 includes a first connecting plate 141 and an upper camera 142 fixed to the first connecting plate 141. The bottom of the top crossbeam 113 is provided with a first groove 1131 extending along the length direction of the top crossbeam 113. The first connecting plate 141 is movably fixed in the first groove 1131. The first connecting plate 141 is made of alloy steel. The first groove 1131 extends along the length direction of the top crossbeam 113 on the top crossbeam 113, so that the upper camera system 140 can move along the length direction of the top crossbeam 113, that is, it can move along the axial direction of the insulator 20. Since the creep of the insulator 20 during the bending test mostly occurs in the part of the insulator 20 close to the first fixture 121, the specific position where the creep occurs is different according to the different lengths of the insulator 20. The movable setting of the upper camera system 140 can make the upper camera system 140 suitable for insulators 20 of various length specifications. Before the bending test is run, the area where the insulating tube of the insulator 20 may creep is pre-determined, and the outer wall of the insulating tube in this area is sprayed with paint. If the insulator 20 creeps, the painted part will undergo strain changes. The strain changes can be reflected on the system platform by image recognition, so that the upper camera system 140 can detect the strain change process of the top of the insulator 20 during the bending test in real time and keep the image record. Among them, the type of spraying paint corresponds to the software that the upper camera system 140 can recognize images.

[0029] Combination Figure 4 As shown, the lower camera system 150 includes a mobile bracket 151 and a lower camera 152 fixed to the mobile bracket 151. The mobile bracket 151 includes a connecting seat 1511 and a moving plate 1512. The connecting seat 1511 is provided in two pieces. The connecting seat 1511 includes a second connecting plate 15111 and a third connecting plate 15112. The third connecting plate 15112 is vertically fixed to the second connecting plate 15111, so that the connecting seat 1511 is L-shaped as a whole. The moving plate 1512 includes a fourth connecting plate 15121 and two fifth connecting plates 15122. The two side edges of the fourth connecting plate 15121 are respectively vertically fixed with two fifth connecting plates 15122, so that the moving plate 1512 is U-shaped as a whole. The mobile plate 1512 is fixedly connected to the third connecting plates 15112 on the two connecting seats 1511 through the fifth connecting plates 15122 on both sides, so that the mobile plate 1512 is fixedly arranged between the two connecting seats 1511, and the lower camera 152 is fixedly connected to the fourth connecting plate 15121 of the mobile plate 1512. At the same time, the U-shaped notch of the mobile plate 1512 is arranged in a downward direction, so that the lower camera 152 is located above the mobile bracket 151.

[0030] Continue reading Figure 1, a second groove 1112 extending along the length direction of the bottom crossbeam 1111 is provided above each bottom crossbeam 1111, and two connecting seats 1511 are movably fixed in the second grooves 1112 of the two bottom crossbeams 1111, respectively. The second groove 1112 extends along the length direction of the bottom crossbeam 1111 on the bottom crossbeam 1111, so that the lower camera system 150 can move along the length direction of the bottom crossbeam 1111, that is, can move along the axial direction of the insulator 20. Specifically, the connecting seat 1511 is fixed to the second groove 1112 through the second connecting plate 15111. Since the creep of the insulator 20 during the bending test mostly occurs in the part of the insulator 20 close to the first fixture 121, the specific position where the creep occurs is different according to the different lengths of the insulator 20. The movable setting of the lower camera system 150 can make the lower camera system 150 suitable for insulators 20 of various length specifications. Before the bending test is run, the area where the insulating tube of the insulator 20 may creep is pre-determined, and the outer wall of the insulating tube in this area is sprayed with paint. If the insulator 20 creeps, the painted part will undergo strain changes. The strain changes can be reflected on the system platform by image recognition, so that the lower camera system 150 can detect the strain change process of the bottom of the insulator 20 during the bending test in real time and keep the image record. Among them, the type of spraying paint corresponds to the software that the lower camera system 150 can recognize images.

[0031] Combination Figure 4 and Figure 5 As shown, the fifth connecting plate 15122 is connected to the third connecting plate 15112 in an adjustable position, the third connecting plate 15112 is provided with a first through hole 15113 and a second through hole 15114, the fifth connecting plate 15122 is provided with a third through hole 15123 and an arc groove 15124, the first through hole 15113 and the third through hole 15123 are matched with each other and fixedly connected by fasteners, and the second through hole 15114 and the arc groove 15124 are matched with each other and fixedly connected by fasteners. The center of the arc groove 15124 is concentric with the center of the third through hole 15123, and the distance between the center of the first through hole 15113 and the center of the second through hole 15114 is equal to the radius of the arc groove 15124. The second through hole 15114 can be fixedly connected after being matched at any position on the arc groove 15124, so that the relative angle between the movable plate 1512 and the connecting seat 1511 can be adjusted, that is, the movable plate 1512 can be fixedly connected to the connecting seat 1511 in an adjustable position, so that the shooting direction of the lower camera 152 can be adjusted, that is, the lower camera 152 can shoot and measure the creep conditions at multiple angles at the bottom of the insulator 20. Among them, the center angle of the arc groove 15124 is less than 180°, which can be suitable for the shooting angle of the lower camera 152, while avoiding the arc groove 15124 from being opened too large to affect the strength of the fifth connecting plate 15122.

[0032] Among them, the upper camera 142 and the lower camera 152 both use the latest existing camera technology, with a solid structure, a stable test process, and easy operation. They also have high resolution, up to 12 million pixels, and the probe can take up to 2,000 images per second. They can not only detect the subtle strain of the insulator 20, but also detect local strain effects in a large range. They are ideal measurement systems that meet the high-end application requirements of industrial environments.

[0033] Among them, the second connecting plate 15111, the third connecting plate 15112, the fourth connecting plate 15121 and the fifth connecting plate 15122 are all made of alloy steel. The second connecting plate 15111 and the third connecting plate 15112 can be integrally formed or fixed by welding, and the fourth connecting plate 15121 and the fifth connecting plate 15122 can also be integrally formed or fixed by welding, which is not limited here.

[0034] The beneficial effects of the present application are as follows: the bending test device of the present application is upgraded and modified from the traditional bending test device. A camera system is added to the existing frame, which can detect the creep condition on the insulator in real time, overcoming the large strain fluctuation and inaccurate measurement results caused by the traditional placement of strain gauges, and can perform high-quality and long-term strain detection. By optimizing the way the camera system is installed, the measurement position and measurement direction of the three-dimensional camera system can be adjusted to adapt to all specifications of insulator bending creep tests. And by adding a hydraulic system, the existing bending test process can be optimized to achieve the stability of the bending force and the adjustability of the tonnage. At the same time, the test device also has the ability to resist environmental interference during the test.

[0035] The technical content and technical features of the present application have been disclosed above. However, it is understood that, under the creative concept of the present application, those skilled in the art can make various changes and improvements to the above structures and materials, including combinations of technical features disclosed or claimed separately herein, and obviously including other combinations of these features. These variations and / or combinations all fall within the technical field involved in the present application and fall within the protection scope of the claims of the present application.

Claims

1. A test device for detecting the bending resistance of an insulator, characterized in that: The test device comprises: The frame comprises a base and two support frames arranged at intervals on the base along the length direction of the base; A first fixture is provided on one of the support frames and is used to install the insulator, wherein the insulator is provided along the length direction of the base; The camera system is movably arranged on the frame and is used for real-time detection of the creep condition of the insulator during the bending test.

2. The test device according to claim 1, characterized in that: The relative position between the two support frames is adjustable.

3. The test device according to claim 1, characterized in that: The frame also includes a top crossbeam, which is arranged along the length direction of the base and fixed to the tops of the two support frames.

4. The test device according to claim 3, characterized in that: The camera system includes an upper camera system and a lower camera system. The upper camera system is fixed below the top crossbeam and is used to detect the bending creep condition of the top of the insulator in real time. The lower camera system is fixed above the base and is used to detect the bending creep condition of the bottom of the insulator in real time.

5. The test device according to claim 4, characterized in that: The upper camera system includes a first connecting plate and an upper camera fixed to the first connecting plate. A first groove extending along the length direction of the top crossbeam is provided at the bottom of the top crossbeam, and the first connecting plate is movably fixed in the first groove.

6. The test device according to claim 4, characterized in that: The lower camera system includes a movable bracket and a lower camera fixed to the movable bracket. A second groove extending along the length direction of the base is provided on the base, and the movable bracket is movably fixed in the second groove.

7. The test device according to claim 6, characterized in that The mobile bracket includes a connecting seat and a moving plate. The base includes two bottom beams spaced apart along the width direction of the base. The second groove is arranged on the bottom beam. There are two connecting seats. The two connecting seats are movably fixed in the second grooves of the two bottom beams respectively. The moving plate is located between the two connecting seats, and the lower camera is installed on the moving plate.

8. The test device according to claim 7, characterized in that: The connecting seat includes a second connecting plate and a third connecting plate, the third connecting plate is vertically fixed to the second connecting plate, the second connecting plate is used to be fixed to the second groove, the third connecting plate is provided with a through hole, the movable plate is provided with an arc groove, the through hole is fixedly connected to any position of the arc groove, so that the movable plate can be fixedly connected to the connecting seat in an adjustable position.

9. The test device according to claim 1, characterized in that: The test device also includes a hydraulic system, which includes a hydraulic motor and a hydraulic jack. The hydraulic motor is arranged outside the frame, and the hydraulic jack is arranged on another support frame to provide bending stress to the insulator.

10. The test device according to claim 9, characterized in that A second fixture is fixed to the end of the insulator that is not fixed to the first fixture. The second fixture is provided with a support rod away from the plate surface of the insulator. The hydraulic jack abuts against the support rod to apply bending stress to the insulator.

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