Single-phase earth fault detection device

Abstract

The utility model relates to the technical field of ground fault detection, and discloses a single-phase ground fault detection device, which comprises a detection main body and an insulating rod, the bottom of the insulating rod is connected with a grip through a clamping mechanism, the surface of the detection main body is detachably connected with a data cable, one end of the data cable is fixedly connected with the grip, and the other end of the data cable is fixedly connected with the insulating rod. A hook is fixedly connected to the top of the insulating rod, a limiting buckle capable of moving up and down is arranged on the inner wall of the hook and used for being matched with the hook to clamp a cable, movement of the limiting buckle is limited through a limiting mechanism, and the insulating rod, the grip and the hook are arranged in a matched mode, so that the grip can be held to hang the insulating rod on the cable needing to be detected. Through the limiting mechanism arranged in the hook, after the insulating rod is hung on a cable, the limiting mechanism can abut against the limiting buckle, so that the limiting buckle and the hook clamp and fix the cable in the middle, and stable connection between the insulating rod and the tested cable can be ensured in windy weather.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of grounding fault detection, and particularly relates to a single-phase grounding fault detection device. BACKGROUND

[0002] Single-phase grounding is a common fault in power systems, indicating that one of the three phases in a three-phase system has short-circuited with the ground. Currently, the detection device commonly used in the field usually consists of a Rogowski coil, a signal acquisition module, and a data processing unit. The Rogowski coil is hung on the exposed part of the cable or line, and the sensor is used to collect fault characteristic signals for analysis. In the distribution network system, the rapid detection and positioning of single-phase grounding faults are of great significance to the reliability of power supply.

[0003] However, the adaptability of the existing detection device under harsh weather conditions still has certain deficiencies. The existing monitoring device has poor wind resistance and stability, which can easily cause operational risks. When detecting, the existing device needs to hang the Rogowski coil in the air on the cable, and its fixing method mainly relies on manual support or a simple hook structure. When the wind is strong on site, the Rogowski coil and the connected detection module are easily affected by the wind and shake violently, which not only leads to unstable signal collection and misjudgment of the fault position, but also may cause high-altitude falling accidents due to the deviation of the device's center of gravity or the loosening of the hook, threatening the safety of the operator and the equipment. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a single-phase grounding fault detection device, which solves the problem of unstable detection results of the detection device in harsh environments.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a single-phase grounding fault detection device, comprising a detection main body and a Rogowski coil, the bottom of the Rogowski coil is connected with a handle through a clamping mechanism, the surface of the detection main body is detachably connected with a data cable, one end of the data cable is fixedly connected with the handle;

[0006] The top of the Rogowski coil is fixedly connected with a hook, the inner wall of the hook is provided with a limiting buckle capable of moving up and down to clamp the cable in cooperation with the hook, the limiting buckle is limited to move through a limiting mechanism, the number of the handles is three, and the handles are connected through wires.

[0007] One side of the detection main body is provided with a wire outlet hole for the data cable to pass through, and the inner wall of the wire outlet hole is provided with a water blocking mechanism to block external rainwater from entering the detection main body.

[0008] Optionally, the clamping mechanism comprises a buckle and an arc-shaped groove, the arc-shaped groove is opened on the upper surface of the handle, the buckle is fixedly connected to the lower surface of the Rogowski coil, and the buckle is clamped with the arc-shaped groove.

[0009] Optionally, the limiting mechanism includes a limiting chamber, a push rod, a baffle, and a compression spring. The limiting chamber is located inside the link bar. The baffle is slidably disposed on the inner wall of the limiting chamber. The compression spring is fixedly connected to the bottom wall of the limiting chamber. The upper surface of the compression spring is fixedly connected to the bottom of the baffle to push the baffle upward. The push rod is fixedly connected to the upper surface of the baffle, and the top of the push rod is fixedly connected to the limiting buckle.

[0010] Optionally, the link bar may also be equipped with a reset mechanism for pulling the baffle to reset.

[0011] Optionally, the reset mechanism includes a pull rod, a reset chamber, and a slider. The reset chamber is located at one end of the link bar near the bottom. The top of the pull rod is fixedly connected to the bottom of the baffle. The slider is slidably disposed inside the reset chamber. The bottom of the pull rod is fixedly connected to the upper surface of the slider.

[0012] Optionally, a groove is provided on the outer circular surface of the link bar at a position corresponding to the reset chamber, and operating handles are provided at both ends of the slider. The operating handles pass through the groove, and a fixing hook is provided on the outer surface of the link bar to fix the operating handles.

[0013] Optionally, the water-blocking mechanism includes a movable block and a return spring. The movable block is slidably disposed on the inner wall of the outlet hole, and the return spring is fixedly connected to the lower surface of the movable block to push the movable block upward.

[0014] Optionally, a drainage hole is provided on the side of the outlet hole near the interior of the detection body, and a one-way valve is provided in the drainage hole.

[0015] This utility model provides a single-phase ground fault detection device, which has the following beneficial effects:

[0016] This utility model provides a single-phase grounding fault detection device. Through the coordinated arrangement of a linker, handle, and hook, the linker can be held by the handle and hung on the cable to be tested. A limiting mechanism within the hook engages with a limiting buckle after the linker is hung on the cable, thus clamping and fixing the cable in the middle between the limiting buckle and the hook. This ensures a stable connection between the linker and the cable under test even in windy conditions, resulting in more stable testing. The coordinated arrangement of the linker, handle, and clamping mechanism allows multiple handles to be connected with wires before testing. During testing, the handles can be quickly connected to the linker, reducing the time required to install wires on the linker and improving efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 For the utility model Figure 1 The structure schematic diagram of the enlarged A place in the middle;

[0019] Figure 3 For the utility model water blocking mechanism side sectional view structure schematic diagram;

[0020] Figure 4 For the utility model limiting mechanism first state sectional view structure schematic diagram;

[0021] Figure 5 For the utility model limiting mechanism second state sectional view structure schematic diagram.

[0022] In the figure: 1, detection main body;2, Lick bar;3, handle;4, data cable;5, hook;6, limit buckle;7, outlet hole;8, buckle;9, arc slot;10, limit bin;11, push rod;12, baffle;13, compression spring;14, pull rod;15, reset bin;16, sliding block;17, sliding slot;18, operating handle;19, fixed hook;20, movable block;21, reset spring;22, hydrophobic hole. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the utility model.

[0024] Please refer to Figures 1 to 5 The utility model provides a technical scheme: a single-phase grounding fault detection device, including detection main body 1 and Lick bar 2, the bottom of Lick bar 2 is connected with handle 3 through the clamping mechanism, the surface of detection main body 1 is detachably connected with data cable 4, one end of data cable 4 is fixedly connected with handle 3.

[0025] The top of Lick bar 2 is fixedly connected with hook 5, the inner wall of hook 5 is equipped with the limit buckle 6 that can move up and down to cooperate with hook 5 and clamp cable, limit buckle 6 is limited to move through the limiting mechanism, the number of handle 3 is three, and three handles 3 are connected through wires.

[0026] One side of detection main body 1 is equipped with outlet hole 7 to pass through data cable 4, the inner wall of outlet hole 7 is equipped with water blocking mechanism to block external rainwater from entering detection main body 1.

[0027] After the clamp rod 2 is hung on the cable, the detection main body 1 is connected with the data cable 4 to detect the signal in the cable to determine the position of single-phase grounding, the three grips 3 can be connected by wires through the setting of the clamping mechanism, and the grip 3 is connected with the clamp rod 2 by using the clamping mechanism, which is more convenient and fast than fixing the grip 3 on the clamp rod 2 by using the wire. The top of the hook 5 is provided with a metal contact, the metal contact is connected with the contact in the middle of the grip 3 through the wire in the clamp rod 2, and then the detection main body 1 is connected with the data cable 4 to detect the cable, the hook 5 can hook the wire, and the stability during detection can be improved by cooperating with the limiting buckle 6 and the limiting mechanism. The water blocking mechanism can block external rainwater and prevent rainwater from entering, and can also clamp the data cable 4 in the middle, so that the situation that the data cable 4 is separated from the detection main body 1 due to pulling the data cable 4 is reduced.

[0028] In the embodiment, as a preferred scheme, the clamping mechanism includes a buckle 8 and an arc-shaped groove 9, the arc-shaped groove 9 is arranged on the upper surface of the grip 3, and the buckle 8 is fixedly connected to the lower surface of the clamp rod 2. The buckle 8 is clamped with the arc-shaped groove 9.

[0029] After the buckle 8 is inserted into the arc-shaped groove 9 and rotated, the clamp rod 2 and the grip 3 are connected together. The grip 3 is provided with a metal contact, and the metal contacts in the relative positions of the clamp rod 2 and the grip 3 are in conduction after the clamp rod 2 and the grip 3 are connected together, which is used for signal transmission. The grip 3 is connected with a wire, and the three grips 3 are connected together.

[0030] In the embodiment, as a preferred scheme, the limiting mechanism includes a limiting bin 10, a push rod 11, a baffle 12 and a compression spring 13. The limiting bin 10 is arranged in the interior of the clamp rod 2, the baffle 12 is slidably arranged on the inner wall of the limiting bin 10, the compression spring 13 is fixedly connected to the bottom wall of the limiting bin 10, the upper surface of the compression spring 13 is fixedly connected with the bottom of the baffle 12 to push the baffle 12 upward, and the push rod 11 is fixedly connected to the upper surface of the baffle 12. The top of the push rod 11 is fixedly connected with the limiting buckle 6.

[0031] The compression spring 13 pushes the baffle 12 upward, so that the baffle 12 pushes the push rod 11 above to move upward. In the process of moving upward of the push rod 11, the limiting buckle 6 above is also moved upward, the limiting buckle 6 cooperates with the hook 5 above to clamp the cable in the middle of the hook 5, and the cable is fixed. In the case of strong wind, the clamping strength can be kept relatively stable to reduce the possibility of the clamp rod 2 falling off due to shaking.

[0032] In this embodiment, as a preferred solution, the inside of the clamp rod 2 is also provided with a reset mechanism for pulling the baffle 12 back to its original position, the reset mechanism comprising a pull rod 14, a reset bin 15 and a sliding block 16, the reset bin 15 being arranged at one end of the clamp rod 2 close to the bottom, the top of the pull rod 14 being fixedly connected with the bottom of the baffle 12, the sliding block 16 being slidably arranged inside the reset bin 15, the bottom of the pull rod 14 being fixedly connected with the upper surface of the sliding block 16, the outer circumferential surface of the clamp rod 2 being provided with a sliding groove 17 at a position corresponding to the reset bin 15, both ends of the sliding block 16 being provided with an operating handle 18, the operating handle 18 penetrating through the sliding groove 17, and the outer surface of the clamp rod 2 being provided with a fixing hook 19 for fixing the operating handle 18.

[0033] The operating handle 18 penetrates out of the sliding groove 17 and extends out of the outer circumferential surface of the clamp rod, so that the operating personnel can pull the operating handle 18 downward, which will drive the sliding block 16 inside to move downward, and the sliding block 16 will pull the pull rod 14 above to move downward, which will pull the baffle 12 downward, so that the limiting buckle 6 is separated from the hook 5, facilitating the hook 5 to be hung on the cable, after the operating handle 18 moves to the bottom of the sliding groove 17, the fixing hook 19 can rotate around the middle rotating shaft, and after the fixing hook 19 rotates, the fixing hook 19 can hook the operating handle 18 to prevent the operating handle 18 from returning to its original position, so that the limiting buckle 6 and the hook 5 are in a separated position, facilitating the hook 5 to be hung on the cable, and when the fixing buckle is released, the compression spring 13 inside pushes the baffle 12 upward, so that the limiting buckle 6 moves upward to clamp the cable in the hook 5.

[0034] In this embodiment, as a preferred solution, the water blocking mechanism comprises a movable block 20 and a reset spring 21, the movable block 20 being slidably arranged on the inner wall of the outlet hole 7, and the reset spring 21 being fixedly connected with the lower surface of the movable block 20 for pushing the movable block 20 upward, the outlet hole 7 being provided with a drainage hole 22 on the side close to the inside of the detection main body 1, and the drainage hole 22 being provided with a one-way valve.

[0035] The reset spring 21 pushes the movable block 20 upward, and when the movable block 20 moves upward, the movable block 20 abuts against the data cable 4 passing through the outlet hole 7, so that the data cable 4 is clamped and fixed, and at the same time, the outlet hole 7 is blocked, preventing external rainwater from entering the surface of the detection main body 1 from the outlet hole 7, the rainwater entering the outlet hole 7 flows into the drainage hole 22, and then is discharged from the bottom of the drainage hole 22, and the one-way valve at the bottom of the drainage hole 22 can control the direction of water flow, preventing rainwater from flowing back from the drainage hole 22.

[0036] In the present application, the working steps of the device are as follows:

[0037] 1, in use will take out the gram stick 2 and handle 3, using the clamping mechanism handle 3 and gram stick 2 are connected together, and one of the handle 3 bottom data cable 4 and detection main body 1 is connected, after connecting ensure that the data cable 4 is located in the outlet hole 7, after determining the position, close the cover of detection main body 1;

[0038] 2, will hang three gram stick 2 on the three-phase line of cable, in the suspension, in advance using the fixed hook 19 on the operating handle 18 is fixed, after the hook 5 hook cable, loose fixed hook 19, make compression spring 13 drive limit buckle 6 reset, make limit buckle 6 and hook 5 on the cable clamping, clamping stable after taking out the clamp meter, in the two ends of gram stick 2 respectively measure the degree, determine the position of single-phase grounding;

[0039] 3, after detection, pull down the operating handle 18, make limit buckle 6 and hook 5 separate and use fixed hook 19 fixed, after fixing, take down gram stick 2 can.

[0040] Finally, it should be noted that in this text, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0041] The above provides a detailed description of the specific embodiments of the present application, this paper applies to the specific example of the principle and implementation of the present application is described, the above example is only used to help understand the method and its core idea of the present application; At the same time, for the general technical personnel in the field, according to the idea of the present application, the specific embodiment and application range will be changed, on the basis of the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A single-phase ground fault detection device, characterized in that: It includes a detection body (1) and a link bar (2). The bottom of the link bar (2) is connected to a handle (3) via a snap-fit ​​mechanism. A data cable (4) is detachably connected to the surface of the detection body (1). One end of the data cable (4) is fixedly connected to the handle (3). The top of the link bar (2) is fixedly connected to a hook (5). The inner wall of the hook (5) is provided with a limit buckle (6) that can move up and down to cooperate with the hook (5) to clamp the cable. The limit buckle (6) restricts movement through a limit mechanism. There are three grips (3), and the three grips (3) are connected to each other by a wire. The detection body (1) has a cable outlet (7) on one side for passing through the data cable (4), and the inner wall of the cable outlet (7) is provided with a water-blocking mechanism to prevent external rainwater from entering the detection body (1).

2. The single-phase ground fault detection device according to claim 1, characterized in that: The latching mechanism includes a latch (8) and an arc groove (9). The arc groove (9) is formed on the upper surface of the grip (3). The latch (8) is fixedly connected to the lower surface of the link bar (2). The latch (8) is latched with the arc groove (9).

3. A single-phase ground fault detection device according to claim 1 or 2, characterized in that: The limiting mechanism includes a limiting chamber (10), a push rod (11), a baffle (12), and a compression spring (13). The limiting chamber (10) is located inside the link bar (2). The baffle (12) is slidably disposed on the inner wall of the limiting chamber (10). The compression spring (13) is fixedly connected to the bottom wall of the limiting chamber (10). The upper surface of the compression spring (13) is fixedly connected to the bottom of the baffle (12) to push the baffle (12) upward. The push rod (11) is fixedly connected to the upper surface of the baffle (12). The top of the push rod (11) is fixedly connected to the limiting buckle (6).

4. A single-phase ground fault detection device according to claim 3, characterized in that: The link bar (2) is also equipped with a reset mechanism inside to pull the baffle (12) to reset.

5. A single-phase ground fault detection device according to claim 4, characterized in that: The reset mechanism includes a pull rod (14), a reset chamber (15), and a slider (16). The reset chamber (15) is located at one end of the link bar (2) near the bottom. The top of the pull rod (14) is fixedly connected to the bottom of the baffle (12). The slider (16) is slidably disposed inside the reset chamber (15). The bottom of the pull rod (14) is fixedly connected to the upper surface of the slider (16).

6. A single-phase ground fault detection device according to claim 5, characterized in that: The link bar (2) has a groove (17) on its outer circular surface corresponding to the reset chamber (15). Both ends of the slider (16) are provided with operating handles (18). The operating handles (18) pass through the groove (17). The outer surface of the link bar (2) is provided with a fixing hook (19) to fix the operating handles (18).

7. A single-phase ground fault detection device according to claim 1 or 2, characterized in that: The water-blocking mechanism includes a movable block (20) and a return spring (21). The movable block (20) is slidably disposed on the inner wall of the outlet hole (7). The return spring (21) is fixedly connected to the lower surface of the movable block (20) to push the movable block (20) upward.

8. A single-phase ground fault detection device according to claim 1 or 2, characterized in that: The outlet hole (7) has a drainage hole (22) on one side near the inside of the detection body (1), and a one-way valve is provided in the drainage hole (22).

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