Ground fault detection clamp for power overhead line
By designing a power overhead line grounding fault detection clamp with a combined structure of main body and movable clamp body, the problem of high-voltage line detection clamps being difficult to accurately align with the center clamp in existing technologies has been solved, achieving efficient fault detection and simple operation.
Patent Information
- Application Number
- CN202423080600.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing overhead power line grounding fault detection clamps are difficult to align accurately with the center clamp when used on high-voltage lines, resulting in poor performance.
A grounding fault detection clamp for overhead power lines was designed. It adopts a combination structure of main body and movable clamp body. The movable clamp body forms a closed coil by fitting with the main body, which can achieve the connection without aligning the center buckle. Data is collected and displayed through circuit module.
It improves the practicality and accuracy of detecting grounding faults in overhead power lines, and the process of connecting and disconnecting is simple, making it suitable for detecting high-voltage lines.
Smart Images
Figure CN223692511U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power cable detection technical field, especially relate to a kind of power overhead line ground fault detection pliers. BACKGROUND
[0002] The most important role of power cable is to transmit electric energy from power station to transformer substation, and then from transformer substation to each user end, such as factory, commercial building and residence, etc. For example, in the power supply network of city, between large transformer substation located in suburb and various buildings in city center, high-voltage electricity is transported through underground buried power cable. This transmission mode can effectively reduce the loss of electric energy in transmission process. Compared with overhead line, cable is less disturbed by external environment (such as bad weather, birds and other factors) due to the protection of insulation layer, and can ensure stable and continuous transmission of electric energy.
[0003] When ground fault occurs in power overhead line, especially distribution line, it is usually necessary to use open-close type caliper to test signal. The commonly used open-close type signal caliper with closed coil is usually for low-voltage line, and individual overhead line-specific open-close type caliper is difficult to align the center of caliper when used due to the height of overhead line, which has poor effect. SUMMARY
[0004] The main purpose of the utility model is to provide a kind of power overhead line ground fault detection pliers, when hanging to wire, it is not necessary to align the center buckle of detection pliers, and it is more practical when disassembling.
[0005] To achieve the above purpose, the utility model provides a kind of power overhead line ground fault detection pliers, including main body, movable pliers, first measuring coil and second measuring coil, one end of movable pliers is installed in main body, the other end is located between main body outside and main body and forms a buckle space, first measuring coil is installed in main body, second measuring coil is installed in movable pliers, and one end of first measuring coil and one end of second measuring coil are connected in main body, when the detection pliers are hung on the wire, one end of movable pliers is close to main body and is attached to main body outside, so that the other end of second measuring coil is in contact with first measuring coil, forming closed coil.
[0006] Optionally, first positioning hole is arranged in main body, second positioning hole is arranged in movable pliers, first positioning hole is aligned with second positioning hole, connecting column is arranged in first positioning hole, connecting column passes through second positioning hole to connect movable pliers with main body.
[0007] Optionally, a first elastic member is arranged on the connecting column, one end of the first elastic member abuts against the inner wall of the main body, and the other end abuts against the inner wall of the movable clamp body.
[0008] Optionally, the lower end of the second measuring coil protrudes from the lower end of the movable clamp body, a notch is arranged on the main body, and when the movable clamp body is attached to the main body, the end of the second measuring coil exposed outside the movable clamp body is inserted into the notch and connected with the first measuring coil.
[0009] Optionally, a boss is arranged on the main body, a limiting member is arranged in the boss, a limiting platform is arranged on the limiting member, and a second elastic member is sleeved on the limiting platform, one end of the second elastic member abuts against the limiting platform, and the other end abuts against the inner wall of the boss.
[0010] Optionally, a first inclined surface platform is arranged at the bottom of the limiting member, a through hole is arranged on the side wall of the main body, and the first inclined surface platform is aligned with the through hole.
[0011] Optionally, a fixing column is arranged on the movable clamp body, a second inclined surface platform is arranged at the end of the fixing column, and when the movable clamp body is attached to the main body, the second inclined surface platform passes through the through hole and contacts the first inclined surface platform.
[0012] Optionally, a circuit module is further arranged in the main body, and the circuit module is electrically connected with the first measuring coil and the second measuring coil.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] The utility model discloses an electric overhead line grounding fault detection clamp which is provided with a main body, a movable clamp body, a first measuring coil and a second measuring coil, one end of the movable clamp body is arranged in the main body, the other end is located between the main body and the main body outside and forms a buckle space, the first measuring coil is arranged in the main body, the second measuring coil is arranged in the movable clamp body, and one end of the first measuring coil and one end of the second measuring coil are connected in the main body, when the detection clamp is hung on the wire, one end of the movable clamp body located outside the main body leans against the main body and is attached to the main body, so that the other end of the second measuring coil is connected with the first measuring coil, and a closed coil is formed. When being hung on the wire, the center buckle of the detection clamp does not need to be aligned, and the practicability is improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.
[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model power overhead line grounding fault detection clamp.
[0017] Figure 2 It is an exploded view of an embodiment of the utility model power overhead line grounding fault detection clamp.
[0018] Figure 3 It is a structural schematic diagram of the contact cooperation between the second inclined surface table and the first inclined surface table.
[0019] Figure 4 It is a schematic diagram of the internal circuit module composition of the power overhead line grounding fault detection main body.
[0020] Explanation of the reference signs:
[0021]
[0022] The realization, functional features and advantages of the utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.
[0025] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary technical personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.
[0026] Please refer to Figures 1-3 The utility model provides a kind of electric overhead line ground fault detection clamp 100, including main body 10, movable clamp body 20, first measuring coil 30 and second measuring coil 31, one end of the movable clamp body 20 is installed in the main body 10, the other end is located between the main body 10 outside and the main body 10 and forms a buckle space, the first measuring coil 30 is installed in the main body 10, the second measuring coil 31 is installed in the movable clamp body 20, and one end of the first measuring coil 30 and one end of the second measuring coil 31 are connected in the main body 10, when the detection clamp is hung to wire, one end of the movable clamp body 20 located outside the main body 10 is close to the main body 10 and is attached to the main body 10, to make the other end of the second measuring coil 31 contact connection with the first measuring coil 30, form closed coil.
[0027] In the embodiment, the main body 10 and the movable clamp body 20 are hollowly arranged, the main body 10 is integrally in the shape of "L", the movable clamp body 20 is divided into two parts, one part is straight arm, and the other part is bent arm, the bent arm is in the shape of elephant trunk, the straight arm part is connected with the relatively short end of the main body 10 and staggered, the straight arm part of the movable clamp body 20 is exposed at the angle of the main body 10;Wherein, the first measuring coil 30 and the second measuring coil 31 can be hollow coil, or coil with magnetic core, but not limited to this.
[0028] In an embodiment of the utility model, first positioning hole 11 is equipped in the main body 10, second positioning hole 21 is equipped in the movable clamp body 20, the first positioning hole 11 is aligned with the second positioning hole 21, connecting column 40 is equipped in the first positioning hole 11, connecting column 40 passes through the second positioning hole 21 and connects the movable clamp body 20 with the main body 10, so that the movable clamp body 20 can rotate with connecting column 40 as the axis, first elastic piece 41 is equipped on connecting column 40, one end of first elastic piece 41 abuts against the inner wall of the main body 10, and the other end abuts against the inner wall of the movable clamp body 20.
[0029] In the embodiment, the connecting column 40 is cylindrical, the inner diameter of which is the same as that of the second positioning hole 21, so as to reduce the shaking of the movable clamp body 20 as much as possible; the first elastic member 41 is a common torsion spring, one end of the first elastic member 41 abuts against the inner wall of the main body 10, and the other end abuts against the inner wall of the movable clamp body 20; in the free state, when the movable clamp body 20 is not subjected to external force, the bending arm part of the movable clamp body 20 is in an open state with the main body 10 under the elastic force of the first elastic member 41, and a buckle space is formed.
[0030] The lower end of the second measuring coil 31 extends from the lower end of the movable clamp body 20, and the main body 10 is provided with a notch 13; when the movable clamp body 20 is attached to the main body 10, the end of the second measuring coil 31 exposed outside the movable clamp body 20 extends into the notch 13 and is connected with the first measuring coil 30.
[0031] It can be understood that when the test clamp is vertically hung on the conductor, the conductor is hung into the buckle space, the straight arm part of the movable clamp body 20 rotates around the connecting column 40 under the force, so that the straight arm part of the movable clamp body 20 is completely retracted into the main body 10 and is parallel to the shorter end of the main body 10, and the bending arm part of the movable clamp body 20 is turned over to be attached to the longer end of the main body 10, so that the other end of the second measuring coil 31 is in contact with the first measuring coil 30, a closed coil is formed, and the closed coil is used for measuring the fault detection of the power conductor.
[0032] The lower end of the main body 10 is further provided with a crooked stick interface 60, which is used for connecting with a high-voltage crooked stick for power, and when the test clamp is vertically hung on the conductor, gravity is provided, the gravity acting on the straight arm part of the movable clamp body 20 is increased, and the movable clamp body 20 can be smoothly turned over.
[0033] In an embodiment of the utility model, the main body 10 is provided with a boss 14, the boss 14 is provided with a limiting piece 15, the limiting piece 15 is provided with a limiting table 16 and a second elastic member 17, one end of the second elastic member 17 abuts against the limiting table 16, and the other end abuts against the inner wall of the boss 14; the bottom of the limiting piece 15 is provided with a first inclined surface table 18, the sidewall of the main body 10 is provided with a through hole 12, and the first inclined surface table 18 is aligned with the through hole 12.
[0034] The movable clamp body 20 is provided with a fixing column 22, the end of the fixing column 22 is provided with a second inclined surface table 23, when the movable clamp body 20 is attached to the main body 10, the second inclined surface table 23 passes through the through hole 12 and is in contact with the first inclined surface table 18.
[0035] In the embodiment, the second elastic member 17 can be a spring, but is not limited thereto. The boss 14 is hollow, and the top of the limiting member 15 is exposed on the upper surface of the boss 14 under the elastic force of the second elastic member 17, and the position of the first inclined surface 18 is always aligned with the through hole 12. It can be understood that the inclined surface of the first inclined surface 18 faces downward, and the inclined surface of the second inclined surface 23 faces upward. When the bending arm portion of the movable clamp body 20 is flipped to be attached to the long end of the main body 10, the second inclined surface 23 passes through the through hole 12 and contacts the first inclined surface 18 and pushes away the first inclined surface 18, so that the limiting member 15 moves upward until the inclined surface of the first inclined surface 18 is completely separated from the second inclined surface 23, and then the plane of the first inclined surface 18 abuts against the plane of the second inclined surface 23, so that the movable clamp body 20 does not separate from the main body 10, and the detection accuracy is improved.
[0036] After detection, the limiting member 15 is lifted to separate the first inclined surface 18 from the second inclined surface 23. Under the elastic force of the second elastic member 17, the bending arm of the movable clamp body 20 separates from the main body 10 and returns to the initial state, so that the detection clamp can be easily separated from the power lead. Compared with the prior art, the center buckle of the detection clamp does not need to be aligned when being hung on the lead, and the disassembly is simple and convenient, and is more practical.
[0037] Please refer to Figure 4 In an embodiment of the utility model, the main body 10 is further provided with a circuit module 50, and the circuit module 50 is electrically connected with the first measuring coil 30 and the second measuring coil 31.
[0038] In the embodiment, the circuit module 50 includes a battery, a management circuit, a measuring circuit and a wireless transmitting and receiving circuit. The management circuit is connected with the battery, the measuring circuit and the wireless transmitting and receiving circuit respectively, and manages the charging and real-time power monitoring of the battery. The measurement data of the measuring circuit is sent to the central processor of the management circuit, and then the management circuit manages the wireless transmitting and receiving circuit to send out the data for display by other related devices. The other devices can be a special data receiving and display box or a mobile phone display screen.
[0039] Working principle: when the test pliers are vertically hung on the wire, the wire is hung into the buckle space, the bending arm part of the movable plier body 20 is turned over to be attached to the long end of the main body 10, so that the other end of the second measuring coil 31 is connected with the first measuring coil 30, a closed coil is formed, the wire is detected for failure, data is collected and displayed through the circuit module 50; after the detection is completed, the limiting piece 15 is lifted, the first inclined surface table 18 is separated from the second inclined surface table 23, the bending arm of the movable plier body 20 is separated from the main body 10, and is restored to the initial state, at this time, the detection pliers can be easily separated from the power wire.
[0040] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the present application, and the contents of the present application are included in the patent protection range of the present application.
Claims
1. A power overhead line earth fault detection clamp, characterised in that, The utility model provides a detection clamp, which comprises a main body, a movable clamp body, a first measuring coil and a second measuring coil, one end of the movable clamp body is arranged in the main body, the other end of the movable clamp body is arranged outside the main body and forms a clamping space between the main body, the first measuring coil is arranged in the main body, the second measuring coil is arranged in the movable clamp body, and one end of the first measuring coil is connected with one end of the second measuring coil in the main body, when the detection clamp is hung on a wire, the end of the movable clamp body arranged outside the main body is close to the main body and is attached to the main body, so that the other end of the second measuring coil is connected with the first measuring coil to form a closed coil.
2. The electric overhead line conductor earth fault detection clamp of claim 1, wherein: The main body is provided with a first positioning hole, the movable clamp body is provided with a second positioning hole, the first positioning hole is aligned with the second positioning hole, the first positioning hole is provided with a connecting column, and the connecting column connects the movable clamp body with the main body by penetrating the second positioning hole.
3. The electric overhead line conductor earth fault detection clamp of claim 2, wherein: The connecting column is provided with a first elastic member, one end of the first elastic member is arranged against the inner wall of the main body, and the other end of the first elastic member is arranged against the inner wall of the movable clamp body.
4. The electric overhead line conductor ground fault detection tongs of claim 1, wherein: The lower end of the second measuring coil is arranged to protrude from the lower end of the movable clamp body, the main body is provided with a notch, and when the movable clamp body is attached to the main body, the end of the second measuring coil exposed outside the movable clamp body is arranged to protrude into the notch and be connected with the first measuring coil.
5. The electric overhead line conductor ground fault detection tongs of claim 1, wherein: the first and second jaws are configured to be moved toward each other to grip the electric overhead line conductor; and the first and second jaws are configured to be moved away from each other to release the electric overhead line conductor. The main body is provided with a boss, the boss is provided with a limiting member, the limiting member is provided with a limiting table and a second elastic member, one end of the second elastic member is arranged against the limiting table, and the other end of the second elastic member is arranged against the inner wall of the boss.
6. The electric overhead line conductor earth fault detection clamp of claim 5, wherein: The bottom of the limiting member is provided with a first inclined surface table, the sidewall of the main body is provided with a through hole, and the first inclined surface table is aligned with the through hole.
7. The electric overhead line conductor earth fault detection clamp of claim 6, wherein: The movable clamp body is provided with a fixing column, the end of the fixing column is provided with a second inclined surface table, and when the movable clamp body is attached to the main body, the second inclined surface table penetrates the through hole and is in contact with the first inclined surface table.
8. The electric overhead line conductor earth fault detection clamp of claim 1, wherein: The main body is further provided with a circuit module, and the circuit module is electrically connected with the first measuring coil and the second measuring coil.