CN210690724U

CN210690724U - Overhead fault indicator

Info

Publication number: CN210690724U
Application number: CN201921287739.XU
Authority: CN
Inventors: 张国; 黄雄凯; 王轶
Original assignee: Changsha Hengdian Juneng Electronic Technology Co ltd
Current assignee: Changsha Hengdian Juneng Electronic Technology Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-06-05
Anticipated expiration: 2029-08-09

Abstract

The utility model discloses an overhead fault indicator, which comprises a wire clamping component, an energy-taking sampling component, an upper shell component and a lower shell component, wherein the wire clamping component comprises an upper clamping plate, a lower clamping plate and a screw rod, the upper clamping plate is arranged on a guide post in the upper shell component, install at the guide post top and be used for preventing to go up the locating part that the grip block shifted out the guide post, the cover is equipped with the pressure spring on the guide post of last grip block below, lower grip block is installed on the inferior valve subassembly under last grip block, the rotatable installation of screw rod is on inferior valve subassembly, screw rod upper end clearance runs through behind the grip block down with last grip block threaded connection, the screw rod rotates and drives the grip block and reciprocate along the guide post, it shifts up and separates and drive epitheca subassembly and inferior valve subassembly separation with lower grip block to go up the grip block, it moves down and lower grip block butt joint centre gripping wire and drives getting in epitheca subassembly and the inferior valve subassembly through the pressure spring and can the sampling subassembly close-connection to go up the grip block. The utility model discloses the clamping-force is more permanent, and factor of safety is high.

Description

Overhead fault indicator

Technical Field

The utility model relates to a power transmission and distribution lines on-line monitoring equipment especially relates to an overhead type fault indicator.

Background

As main physical equipment in the power transmission link of a power grid, a power transmission line is the most huge component of a power system, the power transmission line has severe operating environment, complex terrain and difficult maintenance, and has important influence on the safety and reliability of the power system. Therefore, in a ring network distribution system, especially a system using a large number of ring network load switches, if a short-circuit fault or a ground fault occurs in a next-stage distribution network system, a power supply system of a previous stage must be disconnected within a specified time to prevent a major accident from occurring.

The overhead fault indicator is used for detecting and identifying whether a power line has a fault or not, and the working principle of the overhead fault indicator is that when the power line has faults such as short circuit, grounding and the like, due to the fact that electrical parameters in the line change suddenly, magnetic fields and electric fields are generated around the power line, a control line in the power line fault indicator automatically detects and judges a fault state, fault sections, branches and fault points are determined, an alarm signal is output to drive a display part to work, and red is displayed in an alarm mode, so that the purpose of indicating the fault line is achieved, and inspection workers can conveniently repair and maintain the line.

The existing overhead fault indicator is hung on an outdoor overhead high-voltage wire through a wire clamping assembly, the wire clamping assembly basically comprises two wire pressing springs which are hinged to a lower shell, the wire pressing springs are arranged on two sides of the lower shell and rotate towards the center of the upper end of the lower shell to compress the wire, and an electric field induction signal is output from an electrical connector through the wire pressing springs, a hinged shaft and an electric field outgoing line, so that sampling of the overhead fault indicator is completed. After long-term practice, we have found that the above-mentioned clamping assembly of the prior art fault indicator has the following disadvantages:

the wire pressing spring is a clamping action realized by utilizing elastic deformation, after long-term use, the elastic deformation can gradually lose efficacy, so that the clamping force of the wire pressing spring is smaller and smaller, the pressure spring cannot compress a wire, the device body is slightly moved and shaken, the device body directly falls off the high-voltage wire and is damaged, and even the safety accident that a person is hit by a falling object at high altitude can occur.

Two, for preventing the electrically conductive electric leakage of casing, cause people's safety, the casing of overhead type fault indicator is all made by the plastics material that does not electrically conduct, and utilize line ball spring's deformability to directly press the high-voltage conductor on the casing, no matter in the articulated department with line ball spring, still in the atress department of high-voltage conductor, the stress cracking problem that takes place because of local atress is too violent appears in the casing sooner or later, cause the sealing performance of casing to become invalid, the product is intake, influence life.

In view of the above, it is an urgent technical problem in the art to provide a new overhead fault indicator to overcome the above drawbacks in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, provide a wire clamping component atress is difficult for splitting and the long-term overhead type fault indicator of clamping-force.

The utility model provides an overhead fault indicator, which comprises a shell, a wire clamping component and an energy-taking sampling component, wherein the wire clamping component and the energy-taking sampling component are arranged in the shell, the shell comprises an upper shell component and a lower shell component which are arranged correspondingly up and down, the wire clamping component comprises an upper clamping plate, a lower clamping plate and a screw rod, the upper clamping plate is arranged on a guide post in the upper shell component, the top of the guide post is provided with a limiting part for preventing the upper clamping plate from moving out of the guide post, the guide post below the upper clamping plate is sleeved with a pressure spring, the lower clamping plate is arranged on the lower shell component right below the upper clamping plate, the screw rod is vertically arranged on the lower shell component in a rotatable manner, the upper end gap of the screw rod penetrates through the lower clamping plate and then is in threaded connection with the upper clamping plate, the energy-taking sampling component is arranged at the corresponding part of the upper shell component and the lower shell component, the screw rod rotates to drive the upper clamping plate, the upper clamping plate moves downwards to be in butt joint with the lower clamping plate to clamp the lead and drive the energy-taking sampling assembly in the upper shell assembly and the lower shell assembly to be connected in a closed mode through the pressure spring.

For preventing that grip block and screw rod break away from, the biggest of restriction epitheca subassembly and inferior valve subassembly is opened highly, the epitheca subassembly includes the casing and can dismantle the upper cover of connecting in epitheca open-top department, the inferior valve subassembly includes casing down and can dismantle the lower cover of connecting in casing bottom opening part down, casing top one side symmetry is equipped with the spacing post that upwards extends down, the installation that the epitheca can reciprocate is on each spacing post, install the spacing nail that is used for preventing the epitheca and shifts out spacing post at spacing post top.

For the convenience of operation, the wire clamping assembly further comprises a handle, and the bottom of the screw penetrates through the lower cover to be fixedly connected with the handle.

For the damage degree after reducing the casing and falling, inferior valve subassembly still includes the protective sheath of cladding in the lower cover outside.

The energy-taking sampling assembly comprises an upper iron core assembly and an upper Rogowski coil which are arranged in an upper shell, and a lower iron core assembly and a lower Rogowski coil which are arranged at the corresponding positions of a lower shell, wherein an upper shielding cover is covered outside the upper Rogowski coil, a lower shielding cover is covered outside the lower Rogowski coil, and the upper shell and the lower shell are in up-down butt joint to drive the upper iron core assembly and the lower iron core assembly to be in a closed annular shape.

In order to ensure the accuracy of signal transmission, the upper iron core component is detachably connected with the upper shell through a plurality of symmetrically arranged spring screws.

In order to facilitate the viewing, a nameplate cover plate is arranged on the lower cover.

The lower cover is provided with a radiating fin.

The upper clamping plate is provided with a temperature sensing hole.

In order to prevent the wire from being damaged by clamping, the wire clamping assembly also comprises a rubber wire support fixedly connected on the lower clamping plate.

The utility model has the advantages that the upper clamping plate and the lower clamping plate which are correspondingly arranged are arranged on the upper shell and the lower shell, the screw action of the screw rod is utilized to drive the upper clamping plate to move up and down on the lower clamping plate, the feed force of the screw rotation is used for replacing the deformation force when the existing line pressing spring is reset, so that the clamping force between the upper clamping plate and the lower clamping plate is more permanent, the safety coefficient is high, and the time for the contact part of the upper clamping plate and the cable to be a surface is longer; the upper clamping plate and the lower clamping plate are arranged in a split mode with the upper shell and the lower shell, feeding force applied by rotation of the screw rod acts on the upper clamping plate, pressure applied by downward movement of the upper clamping plate acts on the lower clamping plate, contact surfaces between the upper shell and the lower shell and between the upper clamping plate and the lower clamping plate are large, force transmitted to the upper shell and the lower shell by the upper clamping plate and the lower clamping plate is dispersed, local force applied to the shells is obviously reduced, the problem of stress cracking is reduced, and the service life is longer.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view at a-a in fig. 1.

FIG. 3 is a schematic view of the structure at B-B in FIG. 1.

Fig. 4 is the explosion structure diagram of the upper shell assembly and the wire clamping assembly and the energy-obtaining sampling assembly installed inside the upper shell assembly of the utility model.

Fig. 5 is the explosion structure diagram of the middle-lower shell assembly and the wire clamping assembly, the energy-taking sampling assembly, the data plate cover plate and the radiating fins installed inside the middle-lower shell assembly.

Fig. 6 is a schematic structural view of the installation cable according to the present invention.

The labels shown in the figures and the corresponding component names are:

1. an upper housing assembly; 11. an upper housing; 12. an upper cover; 111. a guide post; 112. a groove; 113. a limiting hole;

2. a lower housing assembly; 21. a lower housing; 22. a lower cover; 23. a protective sleeve; 24. a limit pin; 211. a limiting column; 212. a through groove;

3. a wire clamping assembly; 31. an upper clamping plate; 32. a lower clamping plate; 33. a screw; 34. a limiting member; 35. a pressure spring; 36. a handle; 37. a rubber wire support; 311. a temperature sensing hole;

4. an energy-taking sampling component; 41. an upper core assembly; 42. an upper Rogowski coil; 43. a lower core assembly; 44. a lower Rogowski coil; 45. an upper shield case; 46. a lower shield case; 47. a spring screw;

5. a nameplate cover plate;

6. and a heat sink.

Detailed Description

As can be seen from fig. 1 to 6, the overhead type fault indicator of the present invention comprises a housing, a wire clamping assembly 3 and an energy-taking sampling assembly 4, wherein the housing comprises an upper shell assembly 1 and a lower shell assembly 2,

the upper shell assembly 1 comprises an upper shell 11 and an upper cover 12, wherein the top of the upper shell 11 is open, two guide columns 111 are symmetrically arranged in the upper shell 11 along the axis of the upper shell, a groove 112 with a semicircular cross section is arranged in the center of the bottom of the upper shell 11 along the axis of the upper shell in a penetrating manner, and the upper cover 12 is detachably covered on the top of the upper shell 11;

the lower shell component 2 comprises a lower shell 21 and a lower cover 22, the lower shell 21 is arranged under the upper shell 11 in a vertically butted manner, the bottom of the lower shell 21 is in an open shape, limit posts 211 extending upwards are symmetrically arranged on one side of the top of the lower shell 21 parallel to the axis of the lower shell, corresponding limit holes 113 are formed in the upper shell 11 at the positions corresponding to the limit posts 211, the upper shell 11 can be installed on each limit post 211 through each limit hole 113 in an up-and-down moving manner, and limit nails 24 used for preventing the upper shell 11 from moving out of the limit posts 211 are detachably clamped at the tops of the limit posts 211; a through groove 212 with a semicircular cross section is arranged at the center of the top of the lower shell 21 along the axis of the lower shell in a penetrating manner, the through groove 212 and the groove 112 are arranged in an up-and-down corresponding manner, and the lower cover 22 is detachably sealed and clamped at the bottom of the lower shell 21 through an end face sealing ring and a side face sealing ring;

the wire clamping assembly 3 comprises an upper clamping plate 31, a lower clamping plate 32, a screw 33, two limiting parts 34 and two pressure springs 35, wherein the upper clamping plate 31 is mounted on a guide post 111 in the upper shell 11, the upper clamping plate 31 can move up and down on the guide post 111, the lower clamping plate 32 is mounted on the lower shell 21 right below the upper clamping plate 31, the screw 33 can be vertically mounted on the lower shell 21 in a freely rotating mode around the axis of the screw 33, the upper end gap of the screw 33 penetrates through the lower clamping plate 32 and then is in threaded connection with the upper clamping plate 31, the screw 33 is limited by the lower clamping plate 32 and the lower shell 21 to move up and down, the limiting parts 34 are in threaded connection with the top of the guide post 111 and used for preventing the upper clamping plate 31 from moving out of the guide post 111, and the pressure springs 35 are;

the energy taking and sampling assembly 4 comprises an upper iron core assembly 41, an upper Rogowski coil 42, a lower iron core assembly 43 and a lower Rogowski coil 44, wherein the upper iron core assembly 41 is mounted in the upper shell 11 in a height-adjustable manner, the lower iron core assembly 43 is clamped on the lower shell 21 right below the upper iron core assembly 41 through a sealing ring, the bottom surface of the upper iron core assembly 41 penetrates through the upper shell 11 and is arranged in parallel with the bottom surface of the upper shell 11, the top surface of the lower iron core assembly 43 penetrates through the lower shell 21 and is arranged in parallel with the top surface of the lower shell 21, and the upper shell 11 and the lower shell 21 are in up-down butt joint while driving the upper iron core assembly 41 and the lower iron; the upper Rogowski coil 42 and the lower Rogowski coil 44 are respectively installed in the corresponding installation grooves of the upper shell 11 and the lower shell 21, an upper shielding cover 45 is covered outside the upper Rogowski coil 42, a lower shielding cover 46 is covered outside the lower Rogowski coil 44, and the bottom surface of the upper shielding cover 45 and the inner bottom surface of the upper shell 11, the top surface of the lower shielding cover 46 and the inner top surface of the lower shell 21 are in auxiliary sealing connection through pouring sealant so as to improve the anti-interference capability.

As can be seen from fig. 1 and 5, the wire clamping assembly 3 of the present invention further includes a handle 36, and the bottom of the screw 33 passes through the lower housing 21 and the lower cover 22 and is detachably connected to the handle 36 by a screw.

It can also be seen from fig. 1, 2 and 5 that the utility model discloses still include data plate apron 5 and fin 6, data plate apron 5 clamps in lower cover 22 bottom from outer to inner through the side sealing washer, and fin 6 passes through the installation in lower cover 22 bottom from inner to outer of end face seal and casting glue.

As can be seen from fig. 1, 2, 5 and 6, the lower case assembly 2 of the present invention further includes a protective cover 23 covering the outer side of the lower cover 22, and a window for exposing the handle 36, the nameplate cover plate 5, the heat sink 6 and the indicator is formed on the protective cover 23.

As can be seen from fig. 1, 2 and 4, the upper clamping plate 31 of the present invention is provided with vertically arranged temperature sensing holes 311, and the temperature sensing holes 311 are used for installing a temperature sensing probe.

As can also be seen from fig. 1, 2, 5 and 6, the utility model discloses a wire clamping assembly 3 still includes that a rubber thread holds in the palm 37, and the rubber thread holds in the palm 37 and bonds at grip block 32 top down, and the axis that the rubber thread held in the palm 37 is parallel arrangement with the axis of grip block 32 down, and the cross-section that the rubber thread held in the palm 37 is the crescent of downwarping.

From fig. 4, in the utility model discloses in, go up iron core subassembly 41 and constitute by iron core and iron core clip, central symmetry's division has the mounting hole on four angles of iron core clip, it is equipped with four erection columns to correspond the department in last casing 11 inboards, the installation that goes up iron core subassembly 41 and can reciprocate is on each erection column, there is spring screw 47 at erection column top threaded connection, spring screw 47's spring bottom surface is pressed and is used for adjusting each direction degree of freedom on the iron core clip, four spring screw 47 combinations are used for adjusting the degree of cooperation of upper and lower iron core subassembly.

The utility model discloses an installation as follows:

1. rotating the handle 36 in a counterclockwise direction, the screw 33 rotates counterclockwise around the axis thereof with the handle 36; the upper clamping plate 31 is connected with the screw 33 through threads, and the rotary motion of the screw 33 is converted into the linear motion of the upper clamping plate 31 by utilizing the transmission action of the threads;

the upper clamping plate 31 moves upwards on the guide post 111, the bottom surface of the upper clamping plate 31 is separated from the top surface of the lower clamping plate 32, and the pressure spring 35 rebounds and extends;

go up grip block 31 and continue upward movement on guide post 111, until the bottom surface of the top surface of last grip block 31 withstands the bottom surface of locating part 34, go up grip block 31 and upwards lift casing 11 through locating part 34 and guide post 111, go up casing 11 and upward movement on spacing post 211, go up casing 11 bottom surface and casing 21 top surface separation down, until the bottom surface withstands stop pin 24 bottom surface in last casing 11, go up casing subassembly 1 and lower casing subassembly 2 and be the maximum height of opening.

2. As shown in fig. 6, the cable is loaded from the other side parallel to the axis thereof at the top of the lower case 21 so as to be placed on the rubber thread holder 37.

3. Rotating the handle 36 clockwise, the screw 33 rotates clockwise around the axis with the handle 36; the upper clamping plate 31 is connected with the screw 33 through threads, and the rotary motion of the screw 33 is converted into the linear motion of the upper clamping plate 31 by utilizing the transmission action of the threads;

the upper clamping plate 31 moves downwards on the guide post 111, and the upper shell 11 moves downwards on the limiting post 211 along with the upper clamping plate 31 until the bottom surface of the upper shell 11 is contacted with the top surface of the lower shell 21;

the upper clamping plate 31 continues to move downwards on the guide post 111, and the pressure spring 35 is compressed and applies downward pressure to the upper shell 11 at the same time, so that the bottom surface of the upper shell 11 is tightly connected with the top surface of the lower shell 21, and the upper shell 11 is tightly pressed on the lower shell 21;

go up grip block 31 and continue downstream on guide post 111, until handle 36 is twisted motionless, at this moment, go up grip block 31 and hold in the palm 37 with the rubber line of cable firm card on lower grip block 32, make the utility model discloses must not remove and rotate on the cable.

In the present invention, the upper housing 11 and the upper cover 12 are detachably connected by a screw or a buckle.

The utility model discloses in, last grip block 31, lower grip block 32, screw rod 33, two locating parts 34 and two pressure springs 3 among the wire clamping component 3 can be made by the metal that intensity is high.

Claims

1. The utility model provides an overhead type fault indicator, includes the casing, installs double-layered line subassembly (3) in the casing and gets and to be able to sample subassembly (4), and the casing corresponds epitheca subassembly (1) and inferior valve subassembly (2) that arrange including from top to bottom, its characterized in that: the wire clamping assembly comprises an upper clamping plate (31), a lower clamping plate (32) and a screw (33), the upper clamping plate is arranged on a guide post (111) in the upper shell assembly, a limiting piece (34) for preventing the upper clamping plate from moving out of the guide post is arranged at the top of the guide post, the cover is equipped with pressure spring (35) on the guide post of last grip block below, the grip block is installed on the inferior valve subassembly under last grip block down, the rotatable vertical installation of screw rod is on inferior valve subassembly, screw rod upper end clearance runs through behind the grip block down with last grip block threaded connection, get and to be installed in the corresponding department of epitheca subassembly and inferior valve subassembly by the sampling subassembly, the screw rod rotates and drives the grip block and reciprocate along the guide post, it drives epitheca subassembly and inferior valve subassembly separation through the locating part when the grip block shifts up and separates with lower grip block, it moves down and drives getting in epitheca subassembly and the inferior valve subassembly by the pressure spring and can the sampling subassembly close-connection with grip block butt joint centre gripping wire down to go up the grip block.

2. The overhead fault indicator of claim 1, wherein: the epitheca subassembly includes epitheca (11) and can dismantle upper cover (12) of connecting in epitheca open-top department, and the inferior valve subassembly includes casing (21) down and can dismantle lower cover (22) of connecting in casing bottom opening part down, is equipped with spacing post (211) that upwards extends in casing top one side down, and the installation that the epitheca can reciprocate is on each spacing post, installs at spacing top of the post and is used for preventing that the epitheca shifts out spacing nail (24) of post.

3. The overhead fault indicator of claim 2, wherein: the wire clamping assembly further comprises a handle (36), and the bottom of the screw penetrates through the lower cover to be fixedly connected with the handle.

4. The overhead fault indicator of claim 2, wherein: the lower shell component also comprises a protective sleeve (23) coated on the outer side of the lower cover.

5. The overhead fault indicator of claim 2, wherein: get and to sample subassembly including last iron core subassembly (41) and last rogowski coil (42) of installing in last casing, install lower iron core subassembly (43) and lower rogowski coil (44) that the casing corresponds the department down, be covered with shielding case (45) at last rogowski coil, be covered with shielding case (46) down at lower rogowski coil, go up the casing and dock from top to bottom with lower casing and drive iron core subassembly and lower iron core subassembly and dock from top to bottom and be the confined annular.

6. The overhead fault indicator of claim 5, wherein: the upper iron core component is detachably connected with the upper shell through a plurality of symmetrically arranged spring screws (47).

7. The overhead fault indicator of claim 2, wherein: a nameplate cover plate (5) is arranged on the lower cover.

8. The overhead fault indicator of claim 2, wherein: a heat sink (6) is mounted on the lower cover.

9. The overhead fault indicator of claim 1, wherein: the upper clamping plate is provided with a temperature sensing hole (311).

10. The overhead fault indicator of claim 1, wherein: the wire clamping assembly also comprises a rubber wire support (37) fixedly connected to the lower clamping plate.