Dispersed line electric leakage detection device for serially connected current transformers
By introducing a control motor and rotation adjustment mechanism into the distributed circuit of the series current transformer, the problem that the existing device can only detect at the end is solved, realizing rapid and full-coverage detection of the current in the middle of the cable, and improving the detection accuracy and effect.
Patent Information
- Application Number
- CN202422956582.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing leakage current detection devices for distributed lines with series current transformers can only detect leakage current at the end of the current flow path, and cannot quickly detect leakage current flowing through the middle of the cable, resulting in reduced detection effectiveness.
A device comprising a current transformer, a series cable, and a leakage current detector is designed. The device uses a control motor to drive a rotating rod and a push plate to detect the lateral movement of the current inside the cable. The angle and position of the push plate are adjusted by a rotation adjustment mechanism and an elastic component to achieve rapid detection of the current in the middle of the cable.
It achieves full coverage detection of internal current in distributed cables, improves the accuracy and effectiveness of leakage current detection, and avoids detection blind spots.
Smart Images
Figure CN223692504U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electric leakage detection, and particularly relates to a dispersed line electric leakage detection device of series connection current transformer. BACKGROUND
[0002] In an electrical system, when a cable leaks electricity, the leaked current may charge the equipment shell, and if a human body touches the charged equipment, there is a risk of electric shock. By detecting the electric leakage of the dispersed cable of the series connection current transformer, the electric leakage can be detected in time, an alarm can be given and measures can be taken before the human body touches the charged equipment, and the damage of the current to the electrical equipment can be reduced.
[0003] According to the patent document with the publication number N208569018U, a dispersed line electric leakage detection device of series connection current transformer is disclosed. The detection device halves the secondary current induced by a single set of inductors. The secondary current induced by the two sets of inductors after series connection is the same as the standard current transformer before halving. The two sets of inductors have the same synchronous imbalance matching current transformer parameters. The device splits one set of current transformer into two sets for series connection, uses the same peripheral supporting circuit, and achieves the purpose of passing through three-phase lines and zero lines at different distances.
[0004] However, the above-mentioned device can only detect the current at the end of the flow, and cannot quickly detect the electric leakage of the current flowing in the middle, which reduces the detection effect. UTILITY MODEL CONTENT
[0005] In view of the problems of the existing dispersed line electric leakage detection device of series connection current transformer, the utility model is proposed.
[0006] Therefore, the utility model aims to provide a dispersed line electric leakage detection device of series connection current transformer, which solves the problem of being unable to quickly detect the electric leakage of the current flowing in the middle of the cable.
[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0008] A dispersed line electric leakage detection device of series connection current transformer, comprising a current transformer, a series connection cable and an electric leakage detector, wherein the series connection cable is connected to the current transformer, the electric leakage detector is arranged on the outside of the series connection cable, the bottom of the electric leakage detector is fixedly provided with a moving rod, the lower end of the outer wall of the current transformer is provided with a mounting plate, the outer wall of the mounting plate is fixedly provided with a control motor, the output shaft of the control motor is fixedly provided with a rotating rod, the outer side of the rotating rod is rotatably provided with two push plates arranged at intervals, and the lower end of the moving rod is arranged between the two push plates.
[0009] The rotating adjusting mechanism is arranged between the push plate and the rotating rod for adjusting the pushing angle of the push plate.
[0010] Preferably, the rotating adjusting mechanism comprises a fixed rod, the fixed rod is fixedly connected with the rotating rod, and an annular plate is arranged outside the rotating rod, two connecting rods are fixedly arranged on the side of the annular plate close to the rotating rod, and the connecting rods are fixedly connected with the outer wall of the push plate.
[0011] A plurality of positioning grooves are arranged on the surface of the annular plate in a symmetrical manner, an elastic component is arranged at the end of the fixed rod, and a positioning block is arranged on the elastic component and inserted into the positioning groove.
[0012] Preferably, the elastic component comprises a spring, a through hole is arranged in the positioning block, a fixed plate is fixedly arranged on the inner wall of the through hole, the spring is arranged in the positioning groove, and the two ends of the spring are fixedly connected with the fixed rod and the fixed plate respectively.
[0013] Preferably, the longitudinal section of the fixed plate is in T-shaped arrangement.
[0014] Further, a guide telescopic rod is fixedly arranged between the mounting plate and the leakage detector.
[0015] Preferably, an adjusting screw is rotatably arranged on the side of the mounting plate close to the current transformer, a clamping plate is threadedly arranged on the rod wall of the adjusting screw, and the clamping plate is clamped on the outer side of the current transformer.
[0016] Preferably, a supporting rod is fixedly arranged on the outer wall of the mounting plate, and the clamping plate is slidably arranged on the outer side of the supporting rod.
[0017] Preferably, a rotating handle is fixedly arranged at the end of the adjusting screw.
[0018] Preferably, the mounting plate is adhesively fixed with the current transformer.
[0019] In the above technical solution, the technical effects and advantages of the utility model are as follows:
[0020] 1. The current transformer, the leakage detector, the mounting plate, the control motor, the rotating rod, the push plate and the moving rod can be used for detecting the transverse reciprocating movement of the current flowing through the cable, and the leakage in the current flowing through the cable can be quickly judged, so that the detection effect is ensured.
[0021] 2. The rotating rod, the push plate, the fixed rod, the rotating adjusting mechanism and the elastic component can be used for adjusting the moving distance of the push plate to the moving rod according to the length of the dispersed cable, so that the leakage detection precision is improved. DRAWINGS
[0022] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments will be briefly introduced below, obviously, the accompanying drawings in the following description are only some embodiments described in the present application, and other accompanying drawings can also be obtained by those skilled in the art according to these accompanying drawings.
[0023] Figure 1 It is a structural schematic diagram of the present application;
[0024] Figure 2 It is a structural schematic diagram of the present application; Figure 1 It is an enlarged schematic diagram of A part of the present application;
[0025] Figure 3 It is an enlarged schematic diagram of B part of the present application; Figure 2 It is an enlarged schematic diagram of B part of the present application;
[0026] Figure 4 It is a three-dimensional structural schematic diagram of the push plate of the present application;
[0027] Figure 5 It is a three-dimensional structural schematic diagram of the fixed plate of the present application.
[0028] Explanation of reference signs:
[0029] 1, current transformer; 2, series cable; 3, leakage detector; 4, moving rod; 5, mounting plate; 6, control motor; 7, rotating rod; 8, push plate; 9, fixed rod; 10, annular plate; 11, connecting rod; 12, positioning groove; 13, positioning block; 14, spring; 15, fixed plate; 16, guide telescopic rod; 17, adjusting screw; 18, clamping plate; 19, supporting rod; 20, rotating handle. DETAILED DESCRIPTION
[0030] In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail below in combination with the accompanying drawings.
[0031] The embodiment of the present application discloses a scattered line leakage detection device of series connection current transformer.
[0032] Embodiment 1
[0033] The present application provides a kind of Figures 1-5The device for detecting leakage of dispersion line of a series current transformer includes a current transformer 1, a series cable 2 and a leakage detector 3. The series cable 2 is connected with the current transformer 1, and the leakage detector 3 is sleeved on the outside of the series cable 2. The bottom of the leakage detector 3 is fixedly provided with a moving rod 4. The lower end of the outer wall of the current transformer 1 is provided with a mounting plate 5 which is adhesively fixed with the current transformer 1. The outer wall of the mounting plate 5 is fixedly provided with a control motor 6. The output shaft of the control motor 6 is fixedly provided with a rotating rod 7. The rotating rod 7 is rotatably sleeved with two push plates 8 which are arranged at intervals. The lower end of the moving rod 4 is arranged between the two push plates 8. A guide telescopic rod 16 is fixedly arranged between the mounting plate 5 and the leakage detector 3.
[0034] Before leakage detection, the leakage detector 3 is sleeved on the outside of the series cable 2 and fixed with the current transformer 1 through the mounting plate 5. At this time, the rotating rod 7 can be rotated by driving the control motor 6. Since the two push plates 8 on the outside of the rotating rod 7 are arranged obliquely, the interval between the two push plates 8 is helically shaped when the rotating rod 7 drives the push plates 8 to rotate. At this time, the internal moving rod 4 can be quickly pushed by the two push plates 8, so that the moving rod 4 drives the leakage detector 2 to move transversely, and the leakage detector 2 can comprehensively detect the leakage of the outside of the series cable 3, thereby avoiding the occurrence of a detection blind area.
[0035] Embodiment 2
[0036] In order to adjust the detection range of the leakage detector 2 according to the connection length of the series cable 3, embodiment 2 is based on embodiment 1, as shown in the figure. Figures 1-3 A rotating adjusting mechanism for adjusting the pushing angle of the push plate 8 is arranged between the push plate 8 and the rotating rod 7. The rotating adjusting mechanism includes a fixed rod 9 which is fixedly connected with the rotating rod 7 and rotatably sleeved with an annular plate 10 on the outside. Two connecting rods 11 are fixedly arranged on the side of the annular plate 10 close to the rotating rod 7, and the connecting rods 11 are fixedly connected with the outer wall of the push plate 8.
[0037] A plurality of positioning grooves 12 are arranged on the surface of the annular plate 10 in a circumferentially symmetrical manner. An elastic assembly is arranged on the end of the fixed rod 9, and a positioning block 13 is arranged on the elastic assembly. The positioning block 13 is inserted into the positioning groove 12. The elastic assembly includes a spring 14. A through hole is arranged in the inside of the positioning block 13, and a fixed plate 15 is fixedly arranged on the inner wall of the through hole. The longitudinal section of the fixed plate 15 is arranged in a T shape. The spring 14 is arranged in the positioning groove 12, and the two ends of the spring 14 are fixedly connected with the fixed rod 9 and the fixed plate 15, respectively.
[0038] Before performing leakage current detection, the length of the series cable 3 can be determined. At this time, the pushing distance between the two push plates 8 can be adjusted. First, the positioning block 13 is pulled by the fixing plate 15, so that the spring 14 is stretched and the positioning block 13 is pulled out from the positioning groove 12. At this time, the push plate 8 can be rotated to adjust the setting angle of the push plate 8. When the position is fixed, the fixing plate 15 is released. Under the elastic force of the spring 14, the positioning block 13 can be moved back to its original position and inserted into the positioning groove 13 in another position. The positions of the positioning block 13 and the push plate 8 are fixed. By changing the setting angle of the push plate 8, the pushing distance of the two push plates 8 on the moving rod 5 can be adjusted, thereby adjusting the lateral detection range of the leakage current detector 2 to ensure the leakage current detection effect.
[0039] Example 3
[0040] Example 3, based on Example 1, aims to provide stable support for the mounting plate 5 and the leakage current detector 2, such as... Figure 1 As shown, an adjusting screw 17 is rotatably inserted on the side of the mounting plate 5 near the current transformer 1. A clamping plate 18 is threaded onto the wall of the adjusting screw 17 and clamped onto the outside of the current transformer 1. A support rod 19 is fixedly installed on the upper end of the outer wall of the mounting plate 5. The clamping plate 18 is slidably sleeved on the outside of the support rod 19. A rotating handle 20 is fixedly installed at the end of the adjusting screw 17.
[0041] After the leakage current detector 2 is fitted onto the outside of the series cable 3, the clamping plate 18 and the fixing plate 5 are respectively set on both sides of the current transformer 1. Then, drive the crank handle 20 to rotate, so that the adjusting screw 17 rotates, and the clamping plate 18, under the guidance and support of the support rod 19, approaches the current transformer 1 and clamps the current transformer 1 stably, so that the mounting plate 5 can be stably set on the outside of the current transformer 5 and stably support the position of the leakage current detector 2, ensuring stable detection.
[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A dispersion line leakage detection device of a series connected current transformer, comprising a current transformer (1), a series cable (2) and a leakage detector (3), characterized in that, The series cable (2) is connected with the current transformer (1), the leakage detector (3) is sleeved on the outside of the series cable (2), the bottom of the leakage detector (3) is fixedly provided with a moving rod (4), the lower end of the outer wall of the current transformer (1) is provided with a mounting plate (5), the outer wall of the mounting plate (5) is fixedly provided with a control motor (6), the output shaft of the control motor (6) is fixedly provided with a rotating rod (7), the outer side of the rotating rod (7) is rotatably sleeved with two spaced push plates (8), and the lower end of the moving rod (4) is arranged between the two push plates (8). The rotating adjusting mechanism is arranged between the push plate (8) and the rotating rod (7) and is used for adjusting the pushing angle of the push plate (8).
2. The dispersed line leakage detection apparatus of a current transformer connected in series according to claim 1, characterized by, The rotating adjusting mechanism comprises a fixed rod (9), the fixed rod (9) is fixedly connected with the rotating rod (7), and the outer side is rotatably sleeved with an annular plate (10), two connecting rods (11) are fixedly arranged on the side close to the rotating rod (7) of the annular plate (10), and the connecting rods (11) are fixedly connected with the outer wall of the push plate (8). A plurality of positioning grooves (12) are arranged on the surface of the annular plate (10), the end of the fixed rod (9) is provided with an elastic assembly, and a positioning block (13) is arranged on the elastic assembly, and the positioning block (13) is inserted into the positioning groove (12).
3. The dispersed line leakage detection apparatus of current transformers in series connection according to claim 2, characterized in that, The elastic assembly comprises a spring (14), a through hole is formed in the inner portion of the positioning block (13), a fixed plate (15) is fixedly arranged on the inner wall of the through hole, the spring (14) is arranged in the positioning groove (12), and the two ends of the spring (14) are fixedly connected with the fixed rod (9) and the fixed plate (15) respectively.
4. The dispersed line leakage detection apparatus of claim 3, wherein The longitudinal section of the fixed plate (15) is arranged in a T shape.
5. The dispersed line leakage detection apparatus of current transformers in series according to claim 1, characterized in that, A guide telescopic rod (16) is fixedly arranged between the mounting plate (5) and the leakage detector (3).
6. The dispersed line leakage detection apparatus of current transformers in series connection according to claim 1, characterized by, An adjusting screw (17) is rotatably arranged on the side close to the current transformer (1) of the mounting plate (5), a clamping plate (18) is threadedly sleeved on the rod wall of the adjusting screw (17), and the clamping plate (18) is clamped on the outer side of the current transformer (1).
7. The dispersed line leakage detection apparatus of current transformers in series according to claim 6, characterized in that, A supporting rod (19) is fixedly arranged on the outer wall of the mounting plate (5), and the clamping plate (18) is slidably sleeved on the outer side of the supporting rod (19).
8. The dispersed line leakage detection apparatus of claim 6, wherein A rotating handle (20) is fixedly arranged on the end of the adjusting screw (17).
9. The dispersed line leakage detection apparatus of current transformers in series connection according to claim 1, characterized in that, The mounting plate (5) and the current transformer (1) are adhesively fixed.