CN105116180B - Portable experiment short jumper device - Google Patents

Abstract

A portable test short wiring device includes a bare wire, an extension wire, a reel, a timing alarm device and a magnet. One end of the extension wire is connected to the reel, and the other end of the extension wire is connected to the bare wire. The timing alarm device is arranged on the reel; the magnet is arranged at the bottom of the reel; the extension line is a colored insulating tape. The invention stores the bare wire in the reel, which is more convenient to carry and use than directly using a bare wire at present; and it is equipped with a timing alarm device, which will alarm when the set time is reached to remind the operator in time Remove the short wires to effectively prevent the remaining test short wires on the power equipment. When the equipment resumes power transmission, phase-to-phase short circuits or ground faults will occur, which will endanger the safe and stable operation of the power grid.

Description

Portable Test Short Wiring Device

technical field

The invention relates to the fields of handover and preventive tests of electrical equipment in a power grid, in particular to a portable test short-circuit device.

Background technique

In the handover and preventive tests of electrical equipment, it is necessary to connect and short-circuit multiple electrical parts of the equipment through conductive materials. For example, in the insulation test of the current transformer of the high-voltage switchgear, it is necessary to short-circuit multiple sets of secondary windings of the transformer together with metal wires; The high-voltage contacts are shorted together with metal short-circuit wires. The material selection of the short wiring is relatively wide, braided bare copper wire, hard iron wire, various test wires and other materials can be used.

In the maintenance work of 10kV high-voltage cabinets in substations, the routine maintenance process is as follows: ①The equipment resumes power transmission and starts to work→②Assembly and disassemble the short-circuit line→③Start the maintenance and test work→④Complete the maintenance and test work→⑤Remove the short-circuit line→⑥End of work→ ⑦The equipment resumes power transmission. During the repair and maintenance work of the power system, there have been many short-circuit accidents of the three-phase busbar when the power transmission was restored due to failure to remove the short-circuit line, resulting in equipment damage and economic losses. When the equipment in the 10kV high-voltage cabinet is overhauled and maintained, the space for installing the short-circuit line is narrow, the light is insufficient, and the installation point is relatively hidden, and there is no mechanical lock between the temporarily installed short-circuit line and the high-voltage cabinet. Disconnect the short wire. Once there is a test short circuit left on the power equipment, a phase-to-phase short circuit or a ground fault will occur when the equipment resumes power transmission, which will endanger the safe and stable operation of the power grid.

Contents of the invention

Aiming at the narrow space for short-circuit installation, insufficient light, and relatively hidden installation points, the disassembly and assembly of short-circuit wires is completely based on the memory of personnel, which is likely to cause the problem of missing short-circuit connections. Portable test short-circuit device for reminding and warning.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: a portable test short wiring device, which is characterized in that it includes a bare wire, an extension cord, a reel, a timing alarm device and a magnet, and one end of the extension cord is connected to On the reel, the other end of the extension cord is connected to the bare wire, the timing alarm device is arranged on the reel; the magnet is arranged at the bottom of the reel; the extension cord is Colored insulating tape.

In order to facilitate the storage of bare wires and extension cords, further, the reel includes a reel, a barrel and a handle, the handle is connected to the reel, the reel is located in the reel and the reel The bottom of the spool is connected with the spool through a bearing; a threading hole is provided on the spool.

In order to be able to rotate the handle only when winding bare wires and extension wires, further, the handle includes a handle body and an arbor, and an arbor hole coaxial with the reel is provided on the reel, and the arbor Located in the arbor hole, a key bar is arranged on the arbor, and a keyway cooperating with the keyway is arranged in the arbor hole; the handle body is circular, and the diameter of the handle body is smaller than the The inner diameter of the cylinder, a protrusion is provided around the handle, and a groove is provided on the top of the cylinder to cooperate with the protrusion on the handle. Furthermore, in order to prevent the arbor from slipping out of the arbor hole, a stopper is provided on the top of the key groove, and a bump is provided on the bottom of the key bar.

In order to ensure that the bare wire and the extension wire can be evenly wound on the reel, preferably, the threading hole is a strip-shaped through hole in the axial direction of the barrel.

In order to facilitate the connection between the bare wire and the terminal of the device, further, a plurality of branches are provided on the bare wire, and a "U"-shaped conductive plate is provided at the end of the branch. Further, both the bare wire and the branch are braided flexible wires.

In order to extend the length of the bare wire, further, a banana plug is provided at the end of the bare wire.

After the bare wires and extension wires are wound up, in order to fix the wire ends exposed outside the cylinder, further, a bare wire buckle is provided on the outer wall of the cylinder.

Preferably, the timing alarm device includes an indicator light, a buzzer, buttons, a display screen and a single-chip microcomputer, and the indicator light, buzzer, buttons and display screen are connected to the single-chip microcomputer respectively.

The beneficial effects of the present invention are:

1. It stores the bare wire in the reel, which is more convenient to carry and use than using a bare wire directly; and it is equipped with a timing alarm device, which will alarm after the set time is reached to remind the operator Remove the short wires in time to effectively prevent the remaining test short wires on the power equipment. When the equipment resumes power transmission, there will be a phase-to-phase short circuit or a ground fault, which will endanger the safe and stable operation of the power grid.

2. The reel can be adsorbed on the door of the switch cabinet and other equipment, which not only solves the problem of shelving the reel during use, but also connects the reel to the bare wire through an extension cable, which has a good warning effect on the operator .

3. The rotating handle can be stretched and contracted through the cooperation of the handle shaft and the reel. When winding, pull out the handle body and rotate it. After winding, push the handle body into the cylinder body. The protrusions around the handle body and the concave holes on the cylinder body The groove fits to prevent the rotation of the handle body.

4. A branch is set on the bare wire, and a "U"-shaped conductive plate is arranged at the end of the branch, which can be quickly connected to the terminal of the testing equipment. Moreover, the branch is a soft braided wire, which does not affect the winding.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some preferred embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the overall structural diagram of the present invention;

Fig. 2 is the overall structural diagram of the present invention;

Fig. 3 is a sectional view of the present invention;

FIG. 4 is an enlarged view of part A in FIG. 3 .

In the figure, 1 bare wire, 11 banana plug, 2 extension wire, 3 reel, 31 reel, 311 shaft hole, 32 barrel, 321 threading hole, 322 groove, 323 bare wire buckle, 33 handle, 331 handle body, 3311 protrusion, 3112 stopper, 332 stem, 41 indicator light, 42 button, 43 display screen, 5 magnet, 6 bearing, 7 key bar, 71 bump, 8 branch, 81 "U" type conductive plate.

detailed description

Specific embodiments of the present invention are described in detail below in conjunction with accompanying drawings:

As shown in FIGS. 1 to 4 , the present invention includes a bare wire 1 , an extension cord 2 , a reel 3 , a timing alarm device 4 and a magnet 5 . One end of the extension cord 2 is connected to the reel 3, the other end of the extension cord 2 is connected to the bare wire 1, the timing alarm device is arranged on the reel 3; the magnet 5 is arranged on The bottom of the reel 3; the extension cord 2 is a colored insulating tape. Preferably, the timing alarm device includes an indicator light 41, a buzzer, a button 42, a display screen 43 and a single-chip microcomputer, and the indicator light 41, the buzzer, the button 42 and the display screen are connected to the single-chip microcomputer respectively. Of course, the timing alarm device can also directly adopt the existing timing alarm module.

Specific embodiments of the present invention are described in detail below:

In order to store the bare wire 1 and the extension wire 2 conveniently, the reel 3 includes a reel 31 , a barrel 32 and a handle 33 . The handle 33 is connected to the spool 31, the spool 31 is located in the spool 3 and the bottom of the spool 31 is connected to the spool 3 through a bearing 6; Hole 321. The handle 33 includes a handle body 331 and an arbor 332, the reel 31 is provided with an arbor hole 311 coaxial with the reel 31, the arbor 332 is located in the arbor hole 311, on the handle A key bar 7 is provided on the shaft 332 , and a key groove 3111 matching with the key bar 7 is provided in the arbor hole 311 . The handle body 331 is circular, the diameter of the handle body 331 is smaller than the inner diameter of the cylinder body 32, a protrusion 3311 is provided around the handle body 331, and a protrusion 3311 is provided on the top of the cylinder body 32 to match the inner diameter of the cylinder body 32. The protrusion 3311 on the handle fits into the groove 322 . In order to prevent the arbor 332 from slipping out of the arbor hole 311 , a stopper 3112 is provided on the top of the key groove 3111 , and a protrusion 71 is provided on the bottom of the key bar 7 . In this way, the knob 33 can only be rotated when winding and unwinding bare wires and extension cords. When there is no need to wind and release bare wires and extension wires, the protrusion 3311 is stuck in the groove 322, and the handle body 331 will not rotate.

In order to ensure that the bare wire and the extension wire can be evenly wound on the reel, the threading hole 321 is a strip-shaped through hole opened in the axial direction of the cylinder 32, so that when the wire is wound, the bare wire 1 and the extension wire 2 can be wound back and forth on the reel 31.

In order to facilitate the connection between the bare wire 1 and the terminal of the device, a plurality of branches 8 are arranged on the bare wire 1 , and a "U"-shaped conductive plate 81 is arranged at the ends of the branches 8 . Further, both the bare wire 1 and the branch 8 are braided flexible wires. For extension cords, insulating elastic (or non-elastic) materials can be used, and the color can be designed in conspicuous colors such as red or yellow.

In order to lengthen and expand the bare wire 1, a banana plug 11 is provided at the end of the bare wire 1. The banana plug is an existing plug-in part, and its structure will not be repeated.

After the bare wire 1 and the extension wire 2 are wound up, in order to fix the wire ends exposed outside the cylinder, a bare wire buckle 323 is provided on the outer wall of the cylinder 32 .

The working principle of the present invention is: before use, pull out the handle body 331, then turn the handle body 331 or directly pull the bare wire 1, the reel 31 rotates, and slowly pull out the bare wire 1 and the extension wire 2. Connect the bare wire 1 to the test equipment, and the branch 8 can be easily connected to the terminal of the equipment. After connecting the bare wires, the cylindrical body 32 is adsorbed on iron doors and the like of the equipment by the magnet 5, so that people can see it conveniently. Adjust the timing alarm device, such as start alarm after 10 minutes, so when the operator cannot see the cylinder body 32 or the extension line, it can also be warned by the sound alarm, which can ensure that there is nothing wrong with it.

The above described the preferred embodiments and embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments and embodiments, for those of ordinary skill in the art, without departing from the present invention Under the premise of the concept, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (3)

1. A portable test short wiring device is characterized in that it comprises a bare conductor, an extension cord, a reel, a timing alarm device and a magnet, and one end of the extension cord is connected to the reel, and the end of the extension cord The other end is connected to the bare wire, the timing alarm device is arranged on the reel; the magnet is arranged on the bottom of the reel; the extension line is a colored insulating tape, Described timing alarm device comprises indicator lamp, buzzer, button, display screen and single-chip microcomputer, and described indicator lamp, buzzer, button and display screen are connected with described single-chip microcomputer respectively, The reel includes a spool, a barrel and a handle, the handle is connected to the spool, the spool is located inside the spool and the bottom of the spool is connected to the spool through a bearing; the There are threading holes on the barrel, The handle includes a handle body and an arbor, the reel is provided with an arbor hole coaxial with the reel, the arbor is located in the arbor hole, a key bar is arranged on the arbor, and A key groove matching with the key bar is arranged in the shaft hole; the handle body is circular, the diameter of the handle body is smaller than the inner diameter of the cylinder body, and protrusions are arranged around the handle body, The top of the barrel is provided with a groove that matches the protrusion on the handle, The top of the keyway is provided with a stopper to prevent the arbor from slipping out of the arbor hole, and the bottom of the key bar is provided with a protrusion, so that the handle can only be rotated when winding and releasing bare wires and extension cables , when there is no need to wind and release bare wires and extension cords, the protrusion is stuck in the groove, and the handle will not turn, The threading hole is a strip-shaped through hole in the axial direction of the cylinder, and the outer wall of the cylinder is provided with a bare wire buckle that fixes the wire end exposed outside the cylinder, A plurality of branches are arranged on the bare wire, and "U"-shaped conductive plates are arranged at the ends of the branches. 2. The portable test short-circuit device according to claim 1, characterized in that, both the bare wire and the branch are braided flexible wires. 3. The portable test short-circuit device according to claim 1, wherein a banana plug is provided at the end of the bare wire.