A circuit conduction and grounding test device for cable box transformer installation

Abstract

The invention discloses a circuit conduction and grounding test device installed in a cable box transformer, comprising a ground conduction resistance tester, a current lead and an insulating wire clamp; the insulating wire clamp comprises a front clamping plate, a rear clamping plate, a connecting assembly and a spring assembly, and the connecting assembly is used to adjust the clamping spacing; a connecting port and a grinder are also installed on the front clamping plate, the connecting port is used to connect the current lead, and the grinder is used to perform surface grinding on the clamping part of the insulating wire clamp; the invention adopts an insulating wire clamp equipped with a grinder to fix the test contact end, and can grind the accurate contact point position after the insulating wire clamp is fixed, which is more convenient and accurate; at the same time, the insulating wire clamp of the invention utilizes a connecting assembly structure design that can slide to adjust the wire clamp spacing, and can adjust the clamping spacing of the insulating wire clamp according to the clamping requirements, and has higher practicality and compatibility, and its clamping is less likely to cause looseness, poor contact, and large contact resistance.

Description

Technical Field

[0001] The invention relates to the technical field of grounding test devices, in particular to a circuit conduction grounding test device installed in a cable box transformer. Background Art

[0002] The electrical integrity of the grounding device refers to the electrical connectivity between various electrical equipment that should be grounded in the grounding device, and between various parts of the grounding device and various equipment, that is, the DC resistance value, also known as electrical conductivity. The reliable and effective connection between the grounding down conductor of the power equipment and the ground grid is the fundamental guarantee for the safe operation of the equipment. The grounding down conductor is the connecting part between the power equipment and the ground grid. During the long-term operation of the power equipment, the connection may be affected by factors such as moisture, and the nodes may rust or even break, resulting in an increase in the resistance of the connection point between the grounding down conductor and the main grounding grid, which cannot meet the requirements of the power regulations, causing unsafe hidden dangers in the operation of the equipment, and in severe cases, causing the equipment to lose ground operation. The underground grounding electrode of the grounding device and its connecting parts may also rust or even break.

[0003] Therefore, it is necessary to regularly test the grounding grid conductivity and electrical integrity of the grounding device. The purpose of the grounding grid conductivity test is to determine whether the grounding down conductor is connected to the grounding grid, whether the connection meets the requirements of the regulations, and whether there are hidden dangers. Usually, we judge its operating status by measuring the resistance of the grounding down conductor.

[0004] Box-type substation, referred to as box-type substation, in which the grounding and neutral wire of the box-type substation share a grounding grid. The grounding grid is generally connected by grounding piles at the four corners of the foundation. There must be two reliable connections between the box-type substation and the grounding grid. After the box-type substation is put into operation, the grounding connection should be checked frequently. It needs to be kept tight and free of rust. The grounding resistance value should be measured regularly, and its grounding resistance should not be greater than 4 ohms.

[0005] For the test of the grounding resistance value of the box-type substation, the traditional test method usually uses a grounding resistance tester and adopts crocodile pliers or double-contact thimbles to forcefully push on the metal of the box-type transformer down conductor to achieve contact and conduction. However, due to the size and shape of the grounding down conductors of different specifications, the test contact end is prone to poor contact and produce a large contact resistance, which affects the test results. At the same time, due to the influence of oxidation, stains or protective coatings, the surface of most grounding down conductors has a structural layer that needs to be polished. The traditional method is to use a file for polishing, which is inconvenient to operate and prone to electric shock.

[0006] In view of this, we propose a circuit conduction and grounding test device for cable box transformer installation, which uses an insulating wire clamp equipped with a grinder to fix the test contact end. After the insulating wire clamp is fixed, it can be ground according to the exact contact point position, which is more convenient and accurate; at the same time, the insulating wire clamp of the present invention uses a connecting component structure design that can slide to adjust the wire clamp spacing, and the clamping spacing of the insulating wire clamp can be adjusted according to the clamping requirements. It has higher practicality and compatibility, and its clamping is less likely to cause looseness, poor contact, and large contact resistance.

[0007] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0008] In order to solve the problems raised in the above-mentioned background technology, the technical solution of the present invention proposes a circuit conduction and grounding test device installed in a cable box transformer, which adopts an insulating wire clamp equipped with a grinder to fix the test contact end. After the insulating wire clamp is fixed, it can be ground according to the accurate contact point position, which is more convenient and accurate; at the same time, the insulating wire clamp of the present invention utilizes a connecting component structure design that can slide to adjust the wire clamp spacing, and the clamping spacing of the insulating wire clamp can be adjusted according to the clamping requirements, which has higher practicality and compatibility, and its clamping is less likely to cause looseness, poor contact, and large contact resistance.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A circuit continuity and grounding test device installed in a cable box transformer comprises a ground continuity resistance tester for measuring grounding resistance, two sets of current leads for connecting a continuity test point and a reference point respectively, and two sets of insulating wire clamps for clamping and fixing test ends;

[0011] In the technical solution of the present invention, the insulating wire clamp includes a front clamping plate, a rear clamping plate, two groups of connecting components and a spring component, the two groups of connecting components are respectively installed at the upper and lower ends of the front clamping plate and the rear clamping plate, the front clamping plate and the rear clamping plate are connected by the two groups of connecting components and the spring component, and the two groups of connecting components are used to adjust the clamping distance between the front clamping plate and the rear clamping plate; two groups of connecting ports and two groups of grinders are also installed on the front clamping plate, the two groups of connecting ports are made of conductor material for connecting the current leads, and the two groups of grinders are used to perform surface grinding on the clamping part of the insulating wire clamp.

[0012] Furthermore, the ground bond resistance tester is provided with a control panel, and the current lead includes two groups of test connecting wires, and one end of the two groups of test connecting wires is respectively provided with a connecting plug.

[0013] Furthermore, the two groups of communication ports are respectively provided with connection sockets, and the connection sockets are used for being installed and connected with the connection plugs.

[0014] In the technical solution of the present invention, two groups of threaded mounting holes and two groups of sliding mounting holes are respectively opened on one side of the front clamping plate, the two groups of connecting ports are respectively rotatably mounted in the threaded mounting holes, and the connecting ports can be rotated to move forward and backward in the threaded mounting holes; the two groups of grinders are respectively slidably mounted in the sliding mounting holes, and the grinders can be slid up and down in the sliding mounting holes.

[0015] In the technical solution of the present invention, the two groups of connecting components respectively include a connecting block, a fixed block and a sliding block. The fixed blocks are respectively fixedly connected to the upper and lower ends of the rear splint, and the sliding blocks are respectively slidably installed on the upper and lower ends of the front splint.

[0016] Furthermore, the upper and lower ends of the front clamping plate are respectively provided with sliding grooves, a mounting plate is fixedly provided on one side of the sliding groove, and the sliding blocks are slidably mounted inside the sliding grooves.

[0017] Furthermore, a fixing block through hole is provided on the side of the fixing block, one end of the connecting block is slidably installed inside the fixing block through hole, a connecting block mounting hole is provided on the other end of the connecting block, a mounting shaft is provided on one side of the sliding block, and the other end of the connecting block is rotatably installed on the outside of the mounting shaft through the connecting block mounting hole.

[0018] Furthermore, the connecting assembly also includes a fastening knob and a sliding knob. The upper end surface of the fixed block is also provided with a fastening knob mounting hole. The fastening knob is rotatably mounted inside the fastening knob mounting hole to fix the position of the connecting block slidably mounted inside the through hole of the fixed block; the sliding knob is installed in the mounting plate, and the sliding knob is used to rotate and control the sliding block to slide.

[0019] Furthermore, two groups of mounting grooves are respectively opened on the other side of the front clamping plate, and the sharpening knife is respectively installed in the mounting grooves through the sliding mounting holes.

[0020] Furthermore, one side surface of the sharpening knife is provided with sharpening teeth.

[0021] Effective gain: In summary, the present invention proposes a circuit continuity and grounding test device installed in a cable box transformer. In the technical solution of the present invention, on the one hand, an insulating wire clamp pre-installed with a grinding structure is used to fix the test contact end, and the surface can be polished at the accurate contact point position after the insulating wire clamp is fixed, which is more convenient and accurate;

[0022] On the other hand, the insulating wire clamp of the present invention utilizes a connecting component structure design that can slide to adjust the wire clamp spacing, and the clamping spacing of the insulating wire clamp can be adjusted according to clamping requirements, which has higher practicality and compatibility. The clamping is less likely to cause loosening, poor contact, and large contact resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a circuit continuity and grounding test device installed in a cable box transformer according to the present invention Figure 1 ;

[0024] Figure 2 A schematic diagram of the structure of a circuit continuity and grounding test device installed in a cable box transformer according to the present invention Figure 2 ;

[0025] Figure 3 The structure of the circuit conduction and grounding test device installed in the cable box transformer of the present invention is enlarged Figure 1 ;

[0026] Figure 4 The structure of the circuit conduction and grounding test device installed in the cable box transformer of the present invention is enlarged Figure 2 ;

[0027] Figure 5 The structure of the circuit conduction and grounding test device installed in the cable box transformer of the present invention is enlarged Figure 3 ;

[0028] Figure 6 This is a partial structure of a circuit conduction and grounding test device installed in a cable box transformer of the present invention Figure 1 ;

[0029] Figure 7 This is a partial structure of a circuit conduction and grounding test device installed in a cable box transformer of the present invention. Figure 2 ;

[0030] Figure 8 This is a partial structure of a circuit conduction and grounding test device installed in a cable box transformer of the present invention Figure 3 ;

[0031] Fig. 9 This is a partial structure of a circuit conduction and grounding test device installed in a cable box transformer of the present invention Figure 4 ;

[0032] Fig.10 This is a partial structure of a circuit conduction and grounding test device installed in a cable box transformer of the present invention. Figure 5 ;

[0033] Fig.11 The structure of the circuit conduction and grounding test device installed in the cable box transformer of the present invention is enlarged Figure 4 ;

[0034] Fig.12 The structure of the circuit conduction and grounding test device installed in the cable box transformer of the present invention is enlarged Figure 5 ;

[0035] Fig.13 This is a partial structure of a circuit conduction and grounding test device installed in a cable box transformer of the present invention. Figure 6 ;

[0036] In the figure: 100, ground bond resistance tester; 110, control panel; 200, current lead; 210, test connection line; 211, connection plug; 300, insulated wire clamp; 310, front clamp; 311, threaded mounting hole; 312, sliding mounting hole; 313, slide groove; 314, mounting plate; 315, mounting groove; 320, rear clamp; 330, connection assembly; 331, connection block; 331-1, connection block mounting hole; 332, fixed block; 332-1, fixed block through hole; 332-2, fastening knob mounting hole; 333, sliding block; 333-1, mounting shaft; 334, fastening knob; 335, sliding knob; 340, spring assembly; 350, connecting port; 351, connecting socket; 360, sharpening knife; 361, sharpening knife teeth. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, in the description of the present invention, “several” means two or more than two, unless otherwise clearly and specifically defined.

[0041] In order to solve the problems raised in the above-mentioned background technology, an embodiment of the present invention proposes a circuit conductivity and grounding test device installed in a cable box transformer, which adopts an insulating wire clamp equipped with a grinder to fix the test contact end. After the insulating wire clamp is fixed, it can be ground according to the accurate contact point position, which is more convenient and accurate; at the same time, the insulating wire clamp of the embodiment of the present invention adopts a connection component structure design that can slide to adjust the wire clamp spacing, and the clamping spacing of the insulating wire clamp can be adjusted according to the clamping requirements, which has higher practicality and compatibility, and its clamping is less likely to cause looseness, poor contact, and large contact resistance.

[0042] like Figure 1 As shown, this embodiment provides a circuit continuity and grounding test device for cable box transformer installation, including a ground continuity resistance tester 100 for measuring ground resistance, two sets of current leads 200 for connecting a continuity test point and a reference point respectively, and two sets of insulating wire clamps 300 for clamping and fixing a test end;

[0043] In this embodiment, if Figure 4 As shown, the insulating wire clamp 300 includes a front clamping plate 310, a rear clamping plate 320, two sets of connecting components 330 and a spring component 340. Figure 5 As shown, two sets of connection components 330 are respectively installed at the upper and lower ends of the front clamping plate 310 and the rear clamping plate 320, and the front clamping plate 310 and the rear clamping plate 320 are connected by the two sets of connection components 330 and the spring component 340. The two sets of connection components 330 are used to adjust the clamping distance between the front clamping plate 310 and the rear clamping plate 320; Figure 7 and Figure 8 As shown, two groups of communication ports 350 and two groups of grinders 360 are also installed on the front clamping plate 310. The two groups of communication ports 350 are made of conductive material for connecting the current lead 200, and the two groups of grinders 360 are used to grind the surface of the clamping part of the insulating wire clamp 300.

[0044] Specifically, Figure 2 As shown, the ground bond resistance tester 100 is provided with a control panel 110. Figure 3 As shown, the current lead 200 includes two sets of test connection wires 210, such as Figure 4 As shown, one end of the two groups of test connecting wires 210 is respectively provided with a connecting plug 211.

[0045] Among them, Figure 6 As shown, the two groups of communication ports 350 are respectively provided with connection sockets 351 , and the connection sockets 351 are used for being installed and connected with the connection plugs 211 .

[0046] In this embodiment, if Fig. 9As shown, two groups of threaded mounting holes 311 and two groups of sliding mounting holes 312 are respectively opened on one side of the front clamping plate 310, and the two groups of connecting ports 350 are respectively rotatably installed in the threaded mounting holes 311, and the connecting ports 350 can be rotated to move forward and backward in the threaded mounting holes 311; the two groups of grinders 360 are respectively slidably installed in the sliding mounting holes 312, and the sliding grinders 360 can be used to slide up and down in the sliding mounting holes 312.

[0047] Specifically, Fig.11 As shown, the two groups of connecting components 330 respectively include a connecting block 331, a fixed block 332 and a sliding block 333. The fixed block 332 is respectively fixedly connected to the upper and lower ends of the rear clamping plate 320, and the sliding block 333 is respectively slidably installed on the upper and lower ends of the front clamping plate 310.

[0048] Specifically, the upper and lower ends of the front clamping plate 310 are respectively provided with sliding grooves 313 , a mounting plate 314 is fixedly provided on one side of the sliding grooves 313 , and the sliding blocks 333 are slidably installed inside the sliding grooves 313 .

[0049] Specifically, Fig.12 As shown, a fixing block through hole 332-1 is provided on the side of the fixing block 332, one end of the connecting block 331 is slidably installed inside the fixing block through hole 332-1, a connecting block mounting hole 331-1 is provided on the other end of the connecting block 331, a mounting shaft 333-1 is provided on one side of the sliding block 333, and the other end of the connecting block 331 is rotatably installed on the outside of the mounting shaft 333-1 through the connecting block mounting hole 331-1.

[0050] Specifically, the connecting assembly 330 also includes a tightening knob 334 and a sliding knob 335. The upper end surface of the fixed block 332 is also provided with a tightening knob mounting hole 332-2. The tightening knob 334 is rotatably mounted inside the tightening knob mounting hole 332-2 to fix the connecting block 331 that is slidably mounted inside the fixed block through hole 332-1; the sliding knob 335 is installed in the mounting plate 314, and the sliding knob 335 is used to rotate and control the sliding block 333 to slide.

[0051] Among them, Fig.10 As shown, two groups of mounting grooves 315 are respectively opened on the other side of the front clamping plate 310 , and the sharpeners 360 are respectively installed in the mounting grooves 315 through the sliding mounting holes 312 .

[0052] Among them, Fig.13 As shown, a grinding tooth 361 is provided on one side surface of the grinding knife 360 ​​.

[0053] Specific working principle: When the present embodiment is working, firstly, the tightening knob 334 is loosened, and the connecting block 331 is slid in the fixing block through hole 332-1 by rotating the sliding knob 335, and the spacing between the front clamping plate 310 and the rear clamping plate 320 is adjusted as required. After the adjustment is completed, the tightening knob 334 is screwed to fix the position of the connecting block 331; the insulating wire clamp 300 is clamped at the positions of the grounding down conductor test point and the reference point respectively by the spring assembly 340, and after clamping and fixing, the surface of the points to be tested are polished by the grinder 360 on one side of the sliding front clamping plate 310 respectively. As an operation, the grinder 360 slides up and down in the sliding mounting hole 312 so that the surface of the clamping surface can be polished by the grinding teeth 361 on the surface of the grinder 360; after the polishing is completed, the connecting port 350 is rotated to move inward in the threaded mounting hole 311 and press against the polished clamping surface to conduct electrical conduction to the clamping surface, and then the connecting plugs 211 on the test connecting wire 210 are respectively inserted into the interior of the connecting socket 351 for connection. After the connection is completed, the grounding resistance tester 100 is started to measure the grounding resistance to complete the circuit conduction grounding test.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A circuit continuity and grounding test device installed in a cable box transformer, characterized in that: It comprises a grounding resistance tester (100) for measuring grounding resistance, two sets of current leads (200) for connecting a conduction test point and a reference point, and two sets of insulating wire clamps (300) for clamping and fixing the test end; The insulating wire clamp (300) comprises a front clamping plate (310), a rear clamping plate (320), two groups of connection components (330) and a spring component (340), wherein the two groups of connection components (330) are respectively installed at the upper and lower ends of the front clamping plate (310) and the rear clamping plate (320), and the front clamping plate (310) and the rear clamping plate (320) are connected via the two groups of connection components (330) and the spring component (340), and the two groups of connection components (330) are used to adjust the clamping distance between the front clamping plate (310) and the rear clamping plate (320); The connecting assembly (330) comprises a connecting block (331), a fixed block (332), a sliding block (333), a tightening knob (334) and a sliding knob (335); the fixed block (332) is fixedly connected to the upper and lower ends of the rear clamping plate (320), respectively; a fixed block through hole (332-1) is provided on the side of the fixed block (332); one end of the connecting block (331) is slidably mounted inside the fixed block through hole (332-1); the other end of the connecting block (331) is provided with a connecting block mounting hole (331-1); the sliding block (333) is slidably mounted on the upper and lower ends of the front clamping plate (310), respectively; a mounting shaft (333-1) is provided on one side of the sliding block (333); the other end of the connecting block (331) is rotatably mounted on the outside of the mounting shaft (333-1) through the connecting block mounting hole (331-1); Two groups of communication ports (350) and two groups of grinders (360) are also installed on the front clamping plate (310); the two groups of communication ports (350) are used to connect the current leads (200); and the two groups of grinders (360) are used to grind the surface of the clamping portion of the insulating wire clamp (300).

2. A circuit continuity and grounding test device for cable box transformer installation according to claim 1, characterized in that: The ground bond resistance tester (100) is provided with a control panel (110), and the current lead (200) comprises two groups of test connection wires (210), and one end of the two groups of test connection wires (210) is respectively provided with a connection plug (211).

3. A circuit continuity and grounding test device for cable box transformer installation according to claim 2, characterized in that: The two groups of communication ports (350) are respectively provided with connection sockets (351), and the connection sockets (351) are used for being matched with the connection plugs (211) for installation and connection.

4. A circuit continuity and grounding test device for cable box transformer installation according to claim 1, characterized in that: Two groups of threaded mounting holes (311) and two groups of sliding mounting holes (312) are respectively provided on one side of the front clamping plate (310); the two groups of connecting ports (350) are respectively rotatably mounted in the threaded mounting holes (311), and the connecting ports (350) are rotated to move forward and backward in the threaded mounting holes (311); the two groups of sharpening knives (360) are respectively slidably mounted in the sliding mounting holes (312), and the sharpening knives (360) are slid to slide up and down in the sliding mounting holes (312).

5. A circuit continuity and grounding test device for cable box transformer installation according to claim 1, characterized in that: The upper and lower ends of the front clamping plate (310) are respectively provided with sliding grooves (313), one side of the sliding grooves (313) is respectively fixed with a mounting plate (314), and the sliding blocks (333) are respectively slidably mounted inside the sliding grooves (313).

6. A circuit continuity and grounding test device for cable box transformer installation according to claim 5, characterized in that: The upper end surface of the fixed block (332) is also provided with a fastening knob mounting hole (332-2); the fastening knob (334) is rotatably mounted inside the fastening knob mounting hole (332-2) to fix the position of the connecting block (331) slidably mounted inside the fixed block through hole (332-1); the sliding knob (335) is mounted inside the mounting plate (314); the sliding knob (335) is used to rotate and control the sliding block (333) to slide.

7. A circuit continuity and grounding test device for cable box transformer installation according to claim 4, characterized in that: Two groups of mounting grooves (315) are respectively formed on the other side of the front clamping plate (310), and the sharpening knife (360) is respectively installed in the mounting grooves (315) through the sliding mounting holes (312).

8. A circuit continuity and grounding test device for cable box transformer installation according to claim 1, characterized in that: One side surface of the sharpening knife (360) is provided with sharpening teeth (361).

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