A micro-current leakage sampling device for high and low voltage complete sets of electrical equipment

Abstract

This utility model belongs to the field of cable monitoring technology, specifically relating to a micro-current leakage sampling device for high and low voltage complete sets of electrical equipment. It includes a leakage sampling component comprising a clamp-on ammeter for device control, a fixed clamp head connected to the end of the clamp-on ammeter, a movable clamp head disposed inside the cavity of the clamp-on ammeter, and a button connected to the side surface of the movable clamp head and rotatably connected to the inner wall of the clamp-on ammeter. A limiting component includes a limiting frame made of ceramic material connected to the inner wall of the fixed clamp head, a clamping part disposed on the inner wall of the movable clamp head, and a guide part disposed between the limiting frame and the clamping part. The longitudinal section of the extension end of the limiting frame near the movable clamp head is arc-shaped, and the center of the arc is located on the center line of the button's rotation axis. This utility model, through the setting of the limiting frame, clamping block, and spring strip, can restrict the wire to be tested to the center position between the fixed clamp head and the movable clamp head, thus ensuring the accuracy of micro-current leakage detection.

Description

Technical Field

[0001] This utility model belongs to the field of cable monitoring technology, specifically relating to a micro-current leakage sampling device for high and low voltage complete sets of electrical equipment. Background Technology

[0002] Micro-current leakage current sampling devices for high and low voltage complete sets of electrical equipment play a crucial role in power system safety. As an important component of leakage current protection systems, these devices are primarily used to monitor leakage current in electrical equipment in real time. In high and low voltage complete sets of electrical equipment, leakage current can lead to equipment damage, fires, and even electric shock accidents. Micro-current leakage current sampling devices can promptly detect potential leakage hazards, providing accurate activation signals to leakage current protection devices, thereby cutting off faulty circuits and ensuring the safety of equipment and personnel.

[0003] Clamp-on micro-current leakage sampling devices are a type of micro-current leakage sampling device. Their working principle is based on electromagnetic induction or the Hall effect. For single AC clamp meters, the clamp head uses an electromagnetic current transformer. AC current passes through a coil with a certain turns ratio, generating electromagnetic induction in the clamp head coil, thus obtaining a current proportional to the AC current. This electrical signal is then converted into a digital signal. For AC / DC clamp meters, the clamp head uses a Hall active current clamp, which not only senses the electromagnetic field of AC current but also converts the magnetic field signal into an electrical signal, outputting a voltage signal proportional to the measured current. This voltage signal is then measured and amplified by a Hall element to test the DC signal.

[0004] Existing clamp-on micro-current leakage current sampling devices, in order to ensure the accuracy of test results during line leakage current detection, have strict requirements on the position of the tested line, specifically requiring the line to be precisely centered within the clamp structure. However, most sampling devices currently on the market lack a dedicated structural design that can effectively fix the line and automatically center it within the clamp structure. This deficiency undoubtedly adds extra difficulty to the testing work, forcing testers to spend more time and effort manually adjusting the line position to ensure it is roughly centered, thus affecting the efficiency and convenience of the testing process. Utility Model Content

[0005] The purpose of this invention is to provide a micro-current leakage sampling device for high and low voltage complete sets of electrical equipment. It aims to address the problem that existing clamp-type micro-current leakage sampling devices, in order to ensure the accuracy of the test results, have strict requirements regarding the position of the tested circuit; that is, the tested circuit needs to be precisely centered in the clamp structure. However, currently available sampling devices generally lack a specialized structural design that can effectively fix the circuit and automatically center it in the clamp structure. This deficiency undoubtedly adds extra difficulty to the testing work.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a micro-current leakage sampling device for high and low voltage complete sets of electrical equipment, comprising,

[0007] The leakage current sampling assembly includes a clamp meter for device control, a fixed clamp head connected to the end of the clamp meter, a movable clamp head located inside the clamp meter cavity, and a button connected to the side surface of the movable clamp head and rotatably connected to the inner wall of the clamp meter.

[0008] The limiting assembly includes a limiting frame made of ceramic material connected to the inner wall of the fixed jaw, a clamping part disposed on the inner wall of the movable jaw, and a guide part disposed between the limiting frame and the clamping part. The longitudinal section of the extended end of the limiting frame near the movable jaw is arc-shaped and the center of the arc is located on the center line of the button rotation axis.

[0009] The cable assembly includes a power unit mounted on the side surface of a clamp-on ammeter, a drive unit connected to the side surface of the clamp-on ammeter, a first cable tray connected to one end of the drive unit, and a second cable tray connected to the other end of the drive unit. The first cable tray and the second cable tray are used to route non-tested wires away from the test area.

[0010] As a micro-current leakage sampling device for high and low voltage complete electrical equipment according to this utility model, preferably, the clamping part includes a spring strip made of polytetrafluoroethylene connected to the inner wall of the movable clamp head and a clamping block connected to the end of the spring strip, wherein the clamping block is made of ceramic material.

[0011] As a micro-current leakage sampling device for high and low voltage complete electrical equipment according to this utility model, preferably, the guide part includes a guide block connected to the end of the clamping block and a guide groove opened on the surface of the limiting frame and adapted to the guide block.

[0012] As a micro-current leakage sampling device for high and low voltage complete electrical equipment according to this utility model, preferably, the power unit includes a power motor installed on the side surface of the clamp-on ammeter and a gear connected to the output end of the power motor.

[0013] As a micro-current leakage sampling device for high and low voltage complete electrical equipment according to this utility model, preferably, the driving part includes a first guide sleeve connected to the side surface of the first cable tray, a first guide rail connected to the side surface of the clamp-on ammeter and adapted to the first guide sleeve, and a first rack connected to the side surface of the first guide sleeve and meshing with a gear.

[0014] As a micro-current leakage sampling device for high and low voltage complete electrical equipment according to this utility model, preferably, the driving part further includes a second guide sleeve connected to the side surface of the second cable tray, a second guide rail connected to the side surface of the clamp-on ammeter and adapted to the second guide sleeve, and a second rack connected to the side surface of the second guide sleeve and meshing with the gear.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model, through the setting of a limiting frame, clamping block and spring strip, can restrict the wire to be tested to the center position between the fixed clamp head and the movable clamp head, thus ensuring the accuracy of micro-current leakage detection;

[0017] By configuring the wiring assembly, non-detected wires can be pushed away from the leakage current sampling component, thus avoiding interference with the detection results of the wire being detected. This further improves the accuracy of micro-current leakage detection. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall assembly structure provided for an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the rear view structure provided for an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the limiting component structure provided in an embodiment of this application.

[0022] Figure 4 This is an exploded view of the limiting component provided in an embodiment of this application.

[0023] Figure 5 This is an exploded view of the ribbon cable assembly provided in an embodiment of this application.

[0024] In the diagram: 100, leakage current sampling component; 101, clamp meter; 102, fixed clamp head; 103, movable clamp head; 104, button; 200, limit component; 201, limit frame; 202, clamping part; 202a, clamping block; 202b, spring strip; 203, guide part; 203a, guide block; 203b, guide groove; 300, cable assembly; 301, power unit; 301a, power motor; 301b, gear; 302, drive unit; 302a, first guide rail; 302b, first guide sleeve; 302c, first rack; 302d, second guide rail; 302e, second guide sleeve; 302f, second rack; 303, first cable tray; 304, second cable tray. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 This utility model provides the following technical solution: a micro-current leakage sampling device for high and low voltage complete sets of electrical equipment, comprising,

[0027] The leakage current sampling assembly 100 includes a clamp meter 101 for device control, a fixed clamp head 102 connected to the end of the clamp meter 101, a movable clamp head 103 disposed inside the cavity of the clamp meter 101, and a button 104 connected to the side surface of the movable clamp head 103 and rotatably connected to the inner wall of the clamp meter 101.

[0028] The limiting assembly 200 includes a limiting frame 201 made of ceramic material connected to the inner wall of the fixed pliers head 102, a clamping part 202 provided on the inner wall of the movable pliers head 103, and a guide part 203 provided between the limiting frame 201 and the clamping part 202. The longitudinal section of the extended end of the limiting frame 201 near the movable pliers head 103 is arc-shaped and the center of the arc is located on the center line of the rotation axis of the button 104.

[0029] The cable assembly 300 includes a power unit 301 mounted on the side surface of the clamp ammeter 101, a drive unit 302 connected to the side surface of the clamp ammeter 101, a first cable tray 303 connected to one end of the drive unit 302, and a second cable tray 304 connected to the other end of the drive unit 302. The first cable tray 303 and the second cable tray 304 are used to route non-tested wires away from the test area.

[0030] In use, first press the button 104. The button 104 rotates through the rotating shaft on its surface when pressed. The rotation of the button 104 drives the movable pliers 103 to rotate. After the movable pliers 103 rotates, it forms a jaw with the fixed pliers 102. Then, the fixed pliers 102 and the movable pliers 103 are placed on the surface of the wire to be tested and the button 104 is released. At this time, the button 104 drives the movable pliers 103 to reset. Then, the leakage current sampling component 100 tests the wire to be tested.

[0031] Preferably, the clamping part 202 includes a polytetrafluoroethylene spring strip 202b connected to the inner wall of the movable jaw 103 and a clamping block 202a connected to the end of the spring strip 202b. The clamping block 202a is made of ceramic.

[0032] In practical use, the polytetrafluoroethylene spring strip 202b and the ceramic clamping block 202a can prevent the leakage current sampling component 100 from having large errors during detection.

[0033] Preferably, the guide portion 203 includes a guide block 203a connected to the end of the clamping block 202a and a guide groove 203b formed on the surface of the limiting frame 201 and adapted to the guide block 203a;

[0034] In practical use, the direction of movement of the clamping block 202a can be restricted by the setting of the guide block 203a and the guide groove 203b, so as to avoid the clamping block 202a from deviating during movement and thus failing to achieve the limit of the wire to be tested.

[0035] Preferably, the power unit 301 includes a power motor 301a mounted on the side surface of the clamp ammeter 101 and a gear 301b connected to the output end of the power motor 301a;

[0036] In practical use, the motor 301a and gear 301b provide power for the operation of the drive unit 302.

[0037] Preferably, the drive unit 302 includes a first guide sleeve 302b connected to the side surface of the first cable tray 303, a first guide rail 302a connected to the side surface of the clamp ammeter 101 and adapted to the first guide sleeve 302b, and a first rack 302c connected to the side surface of the first guide sleeve 302b and meshing with the gear 301b.

[0038] In practical use, the first guide sleeve 302b can move through the meshing structure of the gear 301b and the first rack 302c, thereby realizing transmission.

[0039] Preferably, the drive unit 302 further includes a second guide sleeve 302e connected to the side surface of the second cable tray 304, a second guide rail 302d connected to the side surface of the clamp ammeter 101 and adapted to the second guide sleeve 302e, and a second rack 302f connected to the side surface of the second guide sleeve 302e and meshing with the gear 301b.

[0040] In practical use, the movement of the second guide sleeve 302e can be realized through the meshing structure of the gear 301b and the second rack 302f, thereby realizing transmission.

[0041] The working principle of this utility model in specific use is as follows: When clamping, first press the button 104 to drive the movable clamp head 103 to rotate. When the movable clamp head 103 rotates, it can pull the clamping block 202a to rotate through the spring strip 202b. When the clamping block 202a rotates, it can drive the guide block 203a to slide on the inner wall of the guide groove 203b. Then, the fixed clamp head 102 and the movable clamp head 103 are placed on the surface of the wire of the high and low voltage complete set of electrical equipment to be tested, and the position of the leakage current sampling component 100 is adjusted so that the wire of the high and low voltage complete set of electrical equipment to be tested is located in the groove of the limit frame 201. Then, the button 104 can be released. After the button 104 is released, it can drive the clamping block 202a to reset. After the clamping block 202a is reset, it can be driven to reset through the spring strip 202b. After the clamping block 202a is reset, it can limit the wire of the high and low voltage complete set of electrical equipment to be tested.

[0042] Next, the power motor 301a can be operated. When the power motor 301a is running, it can drive the gear 301b to rotate. When the gear 301b rotates, it can drive the first guide sleeve 302b to slide on the surface of the first guide rail 302a through the first rack 302c. When the first guide sleeve 302b slides, it can drive the first cable tray 303 to move away from the clamp ammeter 101. At the same time, when the gear 301b rotates, it can drive the second guide sleeve 302e to slide on the surface of the second guide rail 302d through the second rack 302f. When the second guide sleeve 302e slides, it can drive the second cable tray 304 to move away from the clamp ammeter 101. In this way, the wires of the non-detected high and low voltage complete electrical equipment can be squeezed away from the leakage current sampling component 100, thereby avoiding the wires of the non-detected high and low voltage complete electrical equipment from affecting the detection results of the wire being detected.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A micro-current leakage sampling device for high and low voltage complete sets of electrical equipment, characterized in that: include, The leakage current sampling assembly (100) includes a clamp meter (101) for device control, a fixed clamp head (102) connected to the end of the clamp meter (101), a movable clamp head (103) located inside the cavity of the clamp meter (101), and a button (104) connected to the side surface of the movable clamp head (103) and rotatably connected to the inner wall of the clamp meter (101). The limiting assembly (200) includes a limiting frame (201) made of ceramic material connected to the inner wall of the fixed pliers (102), a clamping part (202) provided on the inner wall of the movable pliers (103), and a guide part (203) provided between the limiting frame (201) and the clamping part (202). The longitudinal section of the extension end of the limiting frame (201) near the movable pliers (103) is arc-shaped and the center of the arc is located on the center line of the rotation axis of the button (104). The cable assembly (300) includes a power unit (301) mounted on the side surface of the clamp ammeter (101), a drive unit (302) connected to the side surface of the clamp ammeter (101), a first cable tray (303) connected to the end of the drive unit (302), and a second cable tray (304) connected to the other end of the drive unit (302). The first cable tray (303) and the second cable tray (304) are used to route non-tested wires away from the test area.

2. The micro-current leakage sampling device of a high-low voltage complete electrical equipment according to claim 1, characterized in that: The clamping part (202) includes a polytetrafluoroethylene spring strip (202b) connected to the inner wall of the movable clamp head (103) and a clamping block (202a) connected to the end of the spring strip (202b). The clamping block (202a) is made of ceramic material.

3. The micro-current leakage sampling device of a high-low voltage complete electrical equipment according to claim 1, characterized in that: The guide part (203) includes a guide block (203a) connected to the end of the clamping block (202a) and a guide groove (203b) formed on the surface of the limit frame (201) and adapted to the guide block (203a).

4. The micro-current leakage sampling device of a high-low voltage complete electrical equipment according to claim 1, characterized in that: The power unit (301) includes a power motor (301a) mounted on the side surface of the clamp ammeter (101) and a gear (301b) connected to the output end of the power motor (301a).

5. The micro-current leakage sampling device of a high-low voltage complete electrical equipment according to claim 1, characterized in that: The drive unit (302) includes a first guide sleeve (302b) connected to the side surface of the first cable tray (303), a first guide rail (302a) connected to the side surface of the clamp ammeter (101) and adapted to the first guide sleeve (302b), and a first rack (302c) connected to the side surface of the first guide sleeve (302b) and meshing with the gear (301b).

6. The micro-current leakage sampling device of a high-low voltage complete electrical equipment according to claim 5, characterized in that: The drive unit (302) further includes a second guide sleeve (302e) connected to the side surface of the second cable tray (304), a second guide rail (302d) connected to the side surface of the clamp ammeter (101) and adapted to the second guide sleeve (302e), and a second rack (302f) connected to the side surface of the second guide sleeve (302e) and meshing with the gear (301b).

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