Diagnostic device

Abstract

This application relates to a diagnostic device. The testing equipment is used for fault detection of cables, and the clamping mechanism is used for clamping and positioning the cables. The testing frame includes a horizontal part and two support parts, both of which are fixedly connected to the horizontal part and arranged opposite to each other. Two clamping mechanisms are arranged corresponding to the two support parts. In the corresponding clamping mechanisms and support parts, the clamping mechanism is slidably disposed on the inner wall of the support part, and the clamping mechanism is also provided with two clamping inclined surfaces. The distance between the two clamping inclined surfaces gradually increases along the direction away from the corresponding support part. Multiple positioning elements are also movably disposed on the clamping inclined surfaces. This application realizes that the clamping mechanisms on both sides are close to each other and clamp the power equipment cable, increasing the contact area between the clamping mechanism and the cable, and ensuring that the current transformer is in close contact with the outer sheath of the cable, thereby making it more convenient and effective to diagnose current faults in power equipment.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a diagnostic device. Background Technology

[0002] The intelligent current fault diagnostic device is a smart device used to monitor and analyze the current status in electrical systems. It aims to quickly identify and diagnose current faults, such as overcurrent, short circuit, leakage, and overload, through real-time data acquisition, analysis, and processing. This device is widely used in power equipment, building power distribution, smart grids, and other fields to improve system safety and stability, reduce fault handling time, and avoid potential equipment damage or fire risks.

[0003] In related technologies, when diagnostic equipment tests power equipment cables, it is necessary to open the front and rear mounting plates, place the cable inside the front and rear mounting plates, then merge the front and rear mounting plates, and then drive the two drive screws one by one. This method makes the diagnostic process time-consuming, labor-intensive, and overly complicated. Utility Model Content

[0004] Therefore, it is necessary to provide a diagnostic device to address the problem that current diagnostic equipment requires opening the front and rear mounting plates, placing the cable inside the plates, merging the plates, and then driving the two drive screws one by one when testing power equipment cables. This method results in a time-consuming, labor-intensive, and overly cumbersome diagnostic process.

[0005] According to one aspect of this application, a diagnostic device is provided for current fault detection of a cable, comprising: a detection frame; a detection device mounted on the detection frame and used for fault detection of the cable; and two clamping mechanisms for clamping and positioning the cable.

[0006] The testing frame includes a horizontal section and two supporting sections, both of which are fixedly connected to the horizontal section and arranged opposite to each other. Two clamping mechanisms are correspondingly arranged with the two supporting sections. In the corresponding clamping mechanisms and supporting sections, the clamping mechanism is slidably arranged on the inner wall of the supporting section, and the clamping mechanism is also provided with two clamping inclined surfaces. The distance between the two clamping inclined surfaces gradually increases along the direction away from the corresponding supporting section. Multiple positioning elements are also movably arranged on the clamping inclined surfaces. The positioning elements include movably arranged clamping plates, which are used to fit against the outer wall of the cable.

[0007] In one embodiment, the horizontal portion has a first rotating cavity and a second rotating cavity that are opposite each other. The horizontal portion also has a linkage cavity located between the first rotating cavity and the second rotating cavity. The linkage cavity is connected to the first rotating cavity and the second rotating cavity. A first rotating cylinder is rotatably installed in the first rotating cavity, and a second rotating cylinder is rotatably installed in the second rotating cavity. A belt connects the first rotating cylinder and the second rotating cylinder.

[0008] In one embodiment, the belt is further provided with a first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat being located on both sides of the first rotating drum and the second rotating drum, respectively; one of the clamping mechanisms is fixedly connected to the first mounting seat, and the other clamping mechanism is fixedly connected to the second mounting seat.

[0009] In one embodiment, the second rotating drum is further provided with a swing arm, which is located outside the detection frame; a positioning cavity is provided inside the swing arm, and a positioning rod is movably installed in the positioning cavity. A limiting protrusion is fixedly provided on the positioning rod, and a first spring is also sleeved on the positioning rod. One end of the first spring abuts against the limiting protrusion, and the other end of the first spring is connected to the bottom wall of the positioning cavity facing the detection frame.

[0010] In one embodiment, the outer wall of the detection frame is provided with a plurality of grooves, and the positioning rod is inserted into the grooves to position the two clamping mechanisms.

[0011] In one embodiment, the support portion is further provided with a through hole. In the corresponding clamping mechanism and support portion, a slide rod is movably installed inside the clamping mechanism. A boss is provided at one end of the slide rod away from the clamping inclined surface. A second spring is also sleeved on the slide rod. One end of the second spring is connected to the boss, and the other end of the second spring is connected to the outer wall of the clamping mechanism.

[0012] In one embodiment, the clamping mechanism has multiple extrusion cavities extending through the clamping ramp, and the positioning member is movably disposed within the extrusion cavities; the positioning member includes a lifting seat, and the clamping plate is rotatably mounted on the end of the lifting seat away from the clamping ramp.

[0013] In one embodiment, a third spring is also provided inside the extrusion chamber, one end of the third spring abutting against the lifting seat, and the other end of the third spring abutting against the bottom wall of the extrusion chamber.

[0014] In one embodiment, the diagnostic device further includes two current transformers corresponding to the clamping mechanism. In the corresponding current transformer and clamping mechanism, the current transformer is disposed on the slide rod at one end away from the boss and located between the two clamping inclined surfaces. Both current transformers are electrically connected to the detection device.

[0015] In one embodiment, the testing frame is provided with a handle; the testing frame is also provided with a warning light; and a rubber pad is provided on the outer wall of the clamping plate.

[0016] This application has the following beneficial effects:

[0017] This application achieves a clamping mechanism on both sides that moves closer together to clamp the power equipment cable. The design of the second spring ensures the current transformer is tightly attached to the cable sheath, thus facilitating more convenient and effective diagnosis of current faults in the power equipment. Furthermore, the application utilizes rubber pads and a movable clamping plate to ensure the positioning element makes more comprehensive contact with the cable, increasing the contact area between the clamping mechanism and the cable, and guaranteeing the stability of the testing frame during operation. This structure is time-saving, labor-saving, and the process is simple and easy to operate. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application.

[0019] Figure 2 This is a half-sectional view of an embodiment of this application.

[0020] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0021] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Testing frame; 101. Horizontal section; 102. Support section; 103. Handle; 104. First rotating cavity; 105. Second rotating cavity; 106. Linkage cavity; 107. First rotating drum; 108. Second rotating drum; 109. Belt; 110. First mounting base; 111. Second mounting base; 112. Swing arm; 113. Positioning cavity; 114. Positioning rod; 115. Limiting protrusion ring; 116. First spring; 117. Groove; 118. Through hole;

[0024] 2. Testing equipment;

[0025] 3. Clamping mechanism; 301. Clamping inclined plane; 302. Slide rod; 303. Boss; 304. Second spring; 305. Extrusion chamber; 306. Positioning component; 3061. Lifting seat; 3062. Clamping plate; 3063. Rubber pad; 307. Third spring; 308. Current transformer. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented 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 this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0032] See appendix Figure 1 - Appendix Figure 4 , Figure 1 The diagram shows an overall structural schematic of a diagnostic device according to an embodiment of this application, used for current fault detection of cables, including a detection frame 1; a detection device 2, mounted on the detection frame 1 and used for fault detection of the cable; and two clamping mechanisms 3, slidably disposed on the detection frame 1 and used for clamping and positioning the cable.

[0033] The testing frame 1 includes a horizontal part 101 and two support parts 102, both of which are fixedly connected to the horizontal part 101 and are arranged opposite to each other. Two clamping mechanisms 3 are arranged corresponding to the two support parts 102. In the corresponding clamping mechanism 3 and support part 102, the clamping mechanism 3 is slidably arranged on the inner wall of the support part 102. The clamping mechanism 3 is also provided with two clamping inclined surfaces 301. The distance between the two clamping inclined surfaces 301 gradually increases along the direction away from the corresponding support part 102. Multiple positioning members 306 are also movably arranged on the clamping inclined surface 301. The positioning member 306 includes a movably arranged clamping plate 3062, which is used to fit against the outer wall of the cable.

[0034] During operation, the operator first holds handle 103 and places the testing frame 1 on the surface of the cable to be tested. Then, the positioning rod 114 is pulled upwards out of the groove 117, and the swing arm 112 is rotated counterclockwise. Rotating the swing arm 112 causes the second rotating drum 108 to rotate, and the first rotating drum 107 also rotates synchronously under the action of the belt 109. The belt 109 causes the clamping mechanisms 3 on both sides to move closer together and clamp the cable. At this time, the two current transformers 308 contact the cable surface. After the cable is clamped and fixed, the positioning rod 114 is released and falls into the corresponding groove 117, thus positioning the two clamping mechanisms 3.

[0035] See appendix Figure 2 - Appendix Figure 3 The horizontal section 101 has a first rotating cavity 104 and a second rotating cavity 105 with opposite sides. The horizontal section 101 also has a linkage cavity 106 located between the first rotating cavity 104 and the second rotating cavity 105. The linkage cavity 106 is connected to the first rotating cavity 104 and the second rotating cavity 105 on both sides. A first rotating cylinder 107 is rotatably installed in the first rotating cavity 104, and a second rotating cylinder 108 is rotatably installed in the second rotating cavity 105. A belt 109 is connected between the first rotating cylinder 107 and the second rotating cylinder 108.

[0036] In some embodiments, when current fault detection of power equipment is required, because the lower end of the surface of the test frame 1 has a large opening, the tester holds the handle 103 and places the test frame 1 on the surface of the cable, rotates the swing arm 112, and the rotation of the swing arm 112 drives the second rotating drum 108 to rotate. At this time, the first rotating drum 107 will also rotate synchronously under the action of the belt 109. At this time, the belt 109 drives the clamping mechanisms 3 on both sides to move closer to each other and clamp the cable.

[0037] In some embodiments, a smooth plate is fixedly connected to the upper end of the inner wall of the linkage cavity 106, and the inner side of the belt 109 contacts the surface of the smooth plate. The smooth plate provides support and limits for the belt 109, ensuring that the belt 109 is always in a taut state.

[0038] See appendix Figure 2 - Appendix Figure 3 The belt 109 is also provided with a first mounting seat 110 and a second mounting seat 111, which are located on both sides of the first rotating drum 107 and the second rotating drum 108, respectively; one clamping mechanism 3 is fixedly connected to the first mounting seat 110, and the other clamping mechanism 3 is fixedly connected to the second mounting seat 111.

[0039] In some embodiments, when the swing arm 112 is rotated counterclockwise, the belt 109 also rotates counterclockwise. The two clamping mechanisms 3 located on the belt 109 also move counterclockwise, thus synchronously converging towards the center and clamping the cable. The first mounting base 110 and the second mounting base 111 are in contact with the inner wall of the linkage cavity 106, thereby limiting the clamping mechanism 3. Through the linkage limiting effect of the smooth plate, the first mounting base 110, and the second mounting base 111, the stability of the belt 109 and the clamping mechanism 3 during movement can be further improved.

[0040] See appendix Figure 2 - Appendix Figure 3 The second rotating drum 108 is also provided with a swing arm 112, which is located outside the detection frame 1. The swing arm 112 has a positioning cavity 113 inside, and a positioning rod 114 is movably installed in the positioning cavity 113. A limiting protrusion ring 115 is fixedly provided on the positioning rod 114, and a first spring 116 is also sleeved on the positioning rod 114. One end of the first spring 116 abuts against the limiting protrusion ring 115, and the other end of the first spring 116 is connected to the bottom wall of the positioning cavity 113 facing the detection frame 1.

[0041] In some embodiments, during operation, the positioning rod 114 is first pulled upwards out of the groove 117, at which point the first spring 116 is compressed, and then the swing arm 112 is rotated counterclockwise. After rotating to the appropriate position, the positioning rod 114 is released, and under the action of the first spring 116, the positioning rod 114 returns to its original position and is inserted into the detection frame 1. After the detection is completed, the positioning rod 114 is pulled upwards out of the groove 117, and then the swing arm 112 is rotated clockwise, at which point the clamping mechanisms 3 on both sides move away from the cable.

[0042] See appendix Figure 1 - Appendix Figure 2 The outer wall of the testing frame 1 is also provided with multiple grooves 117, and the positioning rod 114 is inserted into the grooves 117 to position the two clamping mechanisms 3.

[0043] In some embodiments, when clamping the cable, the positioning rod 114 is first pulled upward out of the groove 117 and the swing arm 112 is rotated counterclockwise, at which point the clamping mechanisms 3 on both sides move closer to the center. After the cable is clamped and fixed, the positioning rod 114 is released and falls into the corresponding groove 117 to position the two clamping mechanisms 3.

[0044] See appendix Figure 1 - Appendix Figure 2The support part 102 is also provided with a through hole 118. In the corresponding clamping mechanism 3 and the support part 102, a slide rod 302 is movably installed inside the clamping mechanism 3. A boss 303 is provided at one end of the slide rod 302 away from the clamping inclined surface 301. A second spring 304 is also sleeved on the slide rod 302. One end of the second spring 304 is connected to the boss 303, and the other end of the second spring 304 is connected to the outer wall of the clamping mechanism 3.

[0045] In some embodiments, during operation, the clamping mechanisms 3 on both sides clamp the cable, causing the two current transformers 308 to abut against the cable surface. At this time, the second spring 304 is stretched and the current transformers 308 move relative to each other towards the cable under the push of the elastic force, so that the two current transformers 308 are stably abutting against the cable surface.

[0046] In some embodiments, in the initial state when not in operation, the current transformer 308 extends out of the clamping mechanism 3 because both ends of the second spring 304 are connected to the boss 303 and the clamping mechanism 3.

[0047] In some embodiments, the inner diameter of the through hole 118 is larger than the diameter of the boss 303, thereby preventing the clamping mechanism 3 from interfering with the movement of the slide bar 302.

[0048] See appendix Figure 2 and attached Figure 4 The clamping mechanism 3 has multiple extrusion cavities 305 that penetrate the clamping inclined surface 301 inside, and the positioning member 306 is movably disposed in the extrusion cavity 305; the positioning member 306 includes a lifting seat 3061, and the clamping plate 3062 is rotatably mounted on the end of the lifting seat 3061 away from the clamping inclined surface 301.

[0049] In some embodiments of this application, when the multiple positioning members 306 on both sides clamp and fix the cable, a rotatable clamping plate 3062 is designed to further improve the fit and clamping effect. Furthermore, in each positioning member 306, the clamping plate 3062 can adaptively adjust its swing angle relative to the lifting seat 3061 according to the position of the cable.

[0050] In some embodiments, since the cable has a circular cross-section, the clamping plate 3062 can be made into an arc shape to further improve the bonding effect.

[0051] See appendix Figure 2 and attached Figure 4 A third spring 307 is also provided inside the extrusion chamber 305. One end of the third spring 307 abuts against the lifting seat 3061, and the other end of the third spring 307 abuts against the bottom wall of the extrusion chamber 305.

[0052] In some embodiments, when the cable is located in the middle of the four clamping ramps 301 on both sides and is fixed by the four clamping ramps 301, in order to further improve the fit and prevent the cable from loosening accidentally, the positioning member 306 moves into the extrusion cavity 305 and clamps the cable, at which time the third spring 307 is compressed.

[0053] In some embodiments, when the detection is completed, the clamping mechanism 3 moves away from the cable to both sides and disengages from the cable, the positioning member 306 disengages from the outer sheath of the cable and returns to its original position under the action of the third spring 307.

[0054] See appendix Figure 1 - Appendix Figure 2 The diagnostic device also includes two current transformers 308 corresponding to the clamping mechanism 3. In the corresponding current transformers 308 and clamping mechanism 3, the current transformers 308 are disposed on the slide bar 302 at one end away from the boss 303 and are located between the two clamping inclined surfaces 301. Both current transformers 308 are electrically connected to the detection device 2.

[0055] In some embodiments, when the clamping mechanisms 3 on both sides move towards the center, the four clamping ramps 301 on both sides form a rhombus or square, and the cable is located in the center and fixed by the four clamping ramps 301. At this time, the current transformers 308 on both sides are attached to the outer sheath of the cable and detect the internal current. The detection results are displayed to the operator through the detection device 2.

[0056] In some embodiments, when the current in the cable is abnormal and a fault exists, the device emits an alarm sound through the detection device 2.

[0057] See appendix Figure 1 and attached Figure 4 The testing frame 1 is also equipped with a handle 103; the testing frame 1 is also equipped with a warning light; and a rubber pad 3063 is provided on the outer wall of the clamping plate 3062.

[0058] In some embodiments, a handle 103 structure is designed to facilitate the operator in lifting the entire device and moving it to the location to be inspected. When the clamping mechanisms 3 on both sides move towards the center and the clamping plate 3062 clamps the outer surface of the cable, a flexible rubber pad 3063 structure is designed to avoid damage to the cable sheath due to excessive clamping force.

[0059] In some embodiments, when a fault occurs in the current of the diagnostic cable, the detected signal is transmitted to a warning light, which flashes to alert the testing personnel that the cable current has failed, allowing them to take appropriate measures in a timely manner.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A diagnostic device for detecting current faults in cables, characterized in that, include: Inspection frame (1); The testing equipment (2) is installed on the testing frame (1) and is used to perform fault detection on the cable; Two clamping mechanisms (3) are used to clamp and position the cable; The detection frame (1) includes a horizontal part (101) and two support parts (102), and the two support parts (102) are fixedly connected to the horizontal part (101) and arranged opposite to each other; Two clamping mechanisms (3) are correspondingly provided with two support parts (102); in the corresponding clamping mechanism (3) and support part (102), the clamping mechanism (3) is slidably disposed on the inner wall of the support part (102), and the clamping mechanism (3) is also provided with two clamping inclined surfaces (301), and the distance between the two clamping inclined surfaces (301) gradually increases along the direction away from the corresponding support part (102); The clamping inclined surface (301) is also movably provided with a plurality of positioning elements (306), the positioning elements (306) including a movably provided clamping plate (3062), the clamping plate (3062) being used to fit against the outer wall of the cable.

2. The diagnostic device of claim 1, wherein The horizontal part (101) has a first rotating cavity (104) and a second rotating cavity (105) that are opposite each other. The horizontal part (101) also has a linkage cavity (106) located between the first rotating cavity (104) and the second rotating cavity (105). The linkage cavity (106) is connected to the first rotating cavity (104) and the second rotating cavity (105). A first rotating cylinder (107) is rotatably installed in the first rotating cavity (104), and a second rotating cylinder (108) is rotatably installed in the second rotating cavity (105). A belt (109) is connected between the first rotating cylinder (107) and the second rotating cylinder (108).

3. The diagnostic device according to claim 2, characterized in that, The belt (109) is also provided with a first mounting seat (110) and a second mounting seat (111), the first mounting seat (110) and the second mounting seat (111) being located on both sides of the first rotating drum (107) and the second rotating drum (108), respectively; One of the clamping mechanisms (3) is fixedly connected to the first mounting base (110), and the other clamping mechanism (3) is fixedly connected to the second mounting base (111).

4. The diagnostic device according to any one of claims 2-3, characterized in that, The second rotating drum (108) is also provided with a swing arm (112), which is located outside the detection frame (1); The swing arm (112) has a positioning cavity (113) inside, and a positioning rod (114) is movably installed in the positioning cavity (113). A limit ring (115) is fixedly provided on the positioning rod (114), and a first spring (116) is also sleeved on the positioning rod (114). One end of the first spring (116) abuts against the limiting protrusion (115), and the other end of the first spring (116) is connected to the bottom wall of the positioning cavity (113) facing the detection frame (1).

5. The diagnostic device of claim 4, wherein The outer wall of the testing frame (1) is provided with a number of grooves (117), and the positioning rod (114) is inserted into the grooves (117) to position the two clamping mechanisms (3).

6. The diagnostic device according to any one of claims 1-3, characterized in that, The support part (102) is also provided with a through hole (118). In the corresponding clamping mechanism (3) and support part (102), a slide rod (302) is movably installed inside the clamping mechanism (3). The slide rod (302) has a boss (303) at one end away from the clamping inclined surface (301). A second spring (304) is also sleeved on the slide rod (302). One end of the second spring (304) is connected to the boss (303), and the other end of the second spring (304) is connected to the outer wall of the clamping mechanism (3).

7. The diagnostic device according to any one of claims 1-3, characterized in that, The clamping mechanism (3) has multiple extrusion cavities (305) that penetrate the clamping inclined surface (301) inside, and the positioning member (306) is movably disposed in the extrusion cavity (305); The positioning element (306) includes a lifting seat (3061), and the clamping plate (3062) is rotatably mounted on the end of the lifting seat (3061) away from the clamping ramp (301).

8. The diagnostic device of claim 7, wherein, A third spring (307) is also provided in the extrusion chamber (305). One end of the third spring (307) abuts against the lifting seat (3061), and the other end of the third spring (307) abuts against the bottom wall of the extrusion chamber (305).

9. The diagnostic device of claim 6, wherein, The diagnostic device also includes two current transformers (308) corresponding to the clamping mechanism (3). In the corresponding current transformer (308) and clamping mechanism (3), the current transformer (308) is disposed on the slide rod (302) at one end away from the boss (303) and is located between the two clamping inclined surfaces (301). Both current transformers (308) are electrically connected to the detection device (2).

10. The diagnostic device according to any one of claims 1-3, characterized in that, The testing frame (1) is also equipped with a handle (103); And / or, the detection rack (1) is also equipped with a warning light; And / or, a rubber pad (3063) is provided on the outer wall of the clamping plate (3062).

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