CN116466192B - High-resistance grounding detection device and method for 10kV distribution line - Google Patents

Abstract

The invention discloses a high-resistance grounding detection device and a high-resistance grounding detection method for a 10kV distribution line, which belong to the technical field of power line fault detection and comprise a placement box, wherein a box door is movably connected to the placement box, a transmitter is arranged in the placement box, a placement drawer is slidably connected to the placement box, a first placement groove for placing components such as a sensor and a receiver is arranged in the placement drawer, a second placement groove for accommodating various connecting wires is arranged on one side of the first placement groove in the placement drawer, a wire collecting mechanism is arranged in the second placement groove, a slot is arranged on the outer side of the second placement groove, a wire fixing mechanism is arranged in the slot, and a third placement groove for placing a wire hanging rod is also arranged below the second placement groove; the invention can automatically wind the wires through the mutual matching of the connecting cylinder, the driving mechanism and other components on the wire winding mechanism, and can uniformly distribute the wires on the winding drum, thereby being convenient for workers to operate and use.

Description

High-resistance grounding detection device and method for 10kV distribution line

Technical Field

The invention belongs to the technical field of power line fault detection, and particularly relates to a high-resistance grounding detection device and method for a 10kV distribution line.

Background

In recent years, due to the improvement of the living standard of substances, people put higher requirements on the power supply quality, so the 10kV distribution line is widely applied in the power system in China. The most important fault in the 10kV power distribution system is a high-resistance ground fault, so that the safety and stability of power supply are affected, and the economic benefit of power enterprises is also affected.

When the ground fault occurs, a manual step-by-step pole climbing visual inspection method is commonly used for searching the ground fault point, and a great deal of time and manpower and material resources are consumed by the manual step-by-step pole climbing visual inspection method. The backward line hunting method is not suitable for the current high-automation level of the power grid, and the grounding fault locator has the characteristics of quick and accurate positioning of grounding points and small errors, can be used for detecting various fault locations of metallic grounding, arc grounding, transitional resistance grounding and the like of overhead lines, and can well detect the occurrence points of grounding faults.

However, the existing ground fault positioning instrument generally comprises a wire, a wire hanging rod, a signal receiver, a transmitter and the like for accessing a power distribution system, and the transmitter is generally arranged separately from other equipment, so that a plurality of boxes are required to be carried when the equipment is transported and carried, the transportation and the carrying are inconvenient, and missing equipment is easy to occur; and the lead of the ground fault locator is normally coiled on the wiring disc, but the manual wire collection is required when the detection is completed and the recovery is completed, and the operation is troublesome because the lead is relatively long.

Disclosure of Invention

The invention aims to provide a high-resistance grounding detection device and method for a 10kV distribution line, which are used for solving the problems in the background technology.

The aim of the invention can be achieved by the following technical scheme:

the high-resistance grounding detection device for the 10kV distribution line comprises a placement box, wherein a box door is movably connected to the placement box, a transmitter is arranged in the placement box, and a placement drawer is slidably connected to the placement box below the transmitter;

be equipped with the first standing groove that is used for placing components such as sensor, receiver in the placing drawer, be located one side of first standing groove in the placing drawer and be equipped with the second standing groove that is used for accomodating various connecting wire, be equipped with wire winding mechanism in the second standing groove, the outside of second standing groove is equipped with a fluting, be equipped with solid line mechanism in the fluting, the below of second standing groove still is equipped with the third standing groove that is used for placing the string pole.

Through above-mentioned technical scheme, set up and place the cabinet, will all place in placing the cabinet except the equipment of transmitter to with the required equipment of ground fault detection unified place in a case, can avoid taking by the hourglass of part like this, also can be convenient for the transportation of whole device carry.

Further, the line winding mechanism comprises a first fixed plate arranged in the second placing groove, a first rotating shaft is arranged on the first fixed plate, a first driving motor used for driving is arranged on one side of the first rotating shaft, a connecting cylinder is arranged on the outer wall of the other side of the first rotating shaft, two sliding grooves are arranged on the inner wall of the connecting cylinder, clamping strips arranged on the outer wall of the sliding grooves and the outer wall of the first rotating shaft are in sliding connection, an annular groove is arranged on the outer wall of the connecting cylinder, a driving mechanism is arranged in the annular groove, a winding drum used for accommodating wires is detachably connected to the tail end of the connecting cylinder, and a controller is arranged on one side, located on the first rotating shaft, of the first fixed plate.

Through above-mentioned technical scheme, take-up mechanism can be automatic take-up to the wire after using accomodate, does not need artificial receipts line, can improve receipts line efficiency greatly, alleviates operator's use burden.

Further, the driving mechanism comprises a second fixing plate arranged in the second placing groove, a second rotating shaft is arranged on the second fixing plate, one end of the second rotating shaft is provided with a worm wheel, one side of the worm wheel is matched with a worm, the bottom end of the worm is rotationally connected with the bottom of the second placing groove, and the top end of the worm is provided with a second driving motor;

the other end of the second rotating shaft is connected with a connecting plate, the tail end of the connecting plate is connected with an annular sliding block, and the annular sliding block is in sliding connection with the annular groove.

Through above-mentioned technical scheme, actuating mechanism can cooperate with the ring channel to can drive the connecting cylinder and make a round trip movement on first axis of rotation, thereby change the position of reel, when can making to accomodate the wire, the wire can even distribute on the reel outer wall.

Further, one end of the winding drum is provided with a clamping ring, the clamping ring is matched with a first clamping groove formed in the connecting cylinder, a plurality of annular clamping grooves are formed in the outer wall of the winding drum, and sponge pads are arranged on two sides of the inner wall of each annular clamping groove.

Through above-mentioned technical scheme, the snap ring cooperates with first draw-in groove, is convenient for install the reel on the connecting cylinder or dismantle from the connecting cylinder, and the head of wire can be pressed from both sides in annular draw-in groove and foam-rubber cushion's cooperation to be convenient for the wire coiling operation when initial receipts line.

Further, the wire fixing mechanism comprises a wire fixing plate, a plurality of holes are formed in the wire fixing plate, telescopic springs are arranged on two sides of the inner wall of each hole, and an arc-shaped pressing plate is arranged at the tail end of each telescopic spring.

Through above-mentioned technical scheme, because the wire does not have spacingly when the rolling to can lead to the wire uneven distribution on the reel, the wire twines on the reel after passing the trompil, thereby can carry out spacingly to the wire, avoid the emergence of this phenomenon, and telescopic spring and arc clamp plate's mutually supporting can carry out spacing fixedly to the wire of different thickness.

A high-resistance grounding detection method for a 10kV distribution line comprises the following steps:

step one, taking out various devices from a placement box, accessing the devices into a power grid system through wires according to connection requirements, and taking out the sensors to be connected into the power grid system through a wire hanging rod;

step two, the transmitter applies voltage to the fault line to enable the fault to reappear, and the current enters the ground at the grounding point and returns to the transmitter through the ground;

step three, the sensor detects a line current signal of a fault line and transmits data to a receiver on the ground in a wireless mode;

step four, the receiver receives the wireless signals sent by the sensor, and the wireless signals are displayed on a liquid crystal screen of the receiver after being analyzed;

if the fault point is in front of the measurement position, the current continuously exists;

if the fault point is behind the measurement location, the current disappears.

The invention has the beneficial effects that:

according to the invention, equipment required by ground fault detection is uniformly placed in one box through the placement drawer, so that missing of part of components can be avoided, and transportation and carrying of the whole device can be facilitated; meanwhile, the wire can be automatically wound up through the mutual matching of the connecting cylinder, the driving mechanism and other components on the wire winding mechanism, and the wires can be uniformly distributed on the winding drum, so that the operation and the use of workers are facilitated.

Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of a drawer according to the present invention;

FIG. 3 is a schematic structural view of a wire winding mechanism according to the present invention;

FIG. 4 is a schematic view of a connecting cylinder according to the present invention;

FIG. 5 is a schematic view of the structure of the spool in the present invention;

FIG. 6 is a schematic diagram of a driving mechanism according to the present invention;

fig. 7 is a schematic structural view of the wire fixing mechanism in the present invention.

The drawings illustrate:

1. placing a box; 2. a transmitter; 3. placing a drawer; 4. a door; 5. a first placement groove; 6. a second placement groove; 7. a wire winding mechanism; 8. slotting; 9. a wire fixing mechanism; 10. a third placement groove; 701. a first fixing plate; 702. a first rotation shaft; 703. a first driving motor; 704. a connecting cylinder; 705. a chute; 706. clamping strips; 707. an annular groove; 708. a driving mechanism; 709. a reel; 710. a controller; 711. a clasp; 712. a first clamping groove; 713. an annular clamping groove; 714. a sponge cushion; 7081. a second fixing plate; 7082. a second rotation shaft; 7083. a worm wheel; 7084. a worm; 7085. a second driving motor; 7086. a connecting plate; 7087. an annular slide block; 901. a wire fixing plate; 902. opening holes; 903. a telescopic spring; 904. an arc-shaped pressing plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The utility model provides a 10kV distribution lines high resistance ground connection detection device, as shown in fig. 1, fig. 2, including placing case 1, swing joint has chamber door 4 on placing case 1, chamber door 4 is used for protecting transmitter 2, be equipped with transmitter 2 in placing case 1, the below sliding connection who is located transmitter 2 on placing case 1 has and places drawer 3, accessible hasp locking when placing drawer 3 does not use, be equipped with the first standing groove 5 that is used for placing components such as sensor, receiver in placing drawer 3, be equipped with the second standing groove 6 that is used for accomodating various connecting wire in the one side that is located first standing groove 5 in placing drawer 3, be equipped with wire receiving mechanism 7 in the second standing groove 6, the outside of second standing groove 6 is equipped with a fluting 8, be equipped with wire fixing mechanism 9 in the fluting 8, the below of second standing groove 6 still is equipped with the third standing groove 10 that is used for placing the string pole. All equipment except the transmitter 2 is placed in the placement drawer 3, so that equipment required by ground fault detection is uniformly placed in one box, missing of part of parts can be avoided, and transportation and carrying of the whole device can be facilitated.

As shown in fig. 3-6, the wire winding mechanism 7 includes a first fixing plate 701 disposed in the second placement groove 6, a first rotating shaft 702 is disposed on the first fixing plate 701, a first driving motor 703 for driving is disposed on one side of the first rotating shaft 702, a connecting cylinder 704 is disposed on an outer wall of the other side of the first rotating shaft 702, two sliding grooves 705 are disposed on an inner wall of the connecting cylinder 704, the sliding grooves 705 are slidably connected with a clamping strip 706 disposed on an outer wall of the first rotating shaft 702, and the sliding grooves 705 are matched with the clamping strip 706, so that the connecting cylinder 704 can only move back and forth along the direction of the clamping strip 706, thereby changing the position of the spool 709. An annular groove 707 is formed in the outer wall of the connecting cylinder 704, a driving mechanism 708 is arranged in the annular groove 707, a winding drum 709 for accommodating wires is detachably connected to the tail end of the connecting cylinder 704, a controller 710 is arranged on one side, located on the first rotating shaft 702, of the first fixing plate 701, and the controller 710 can control the starting and stopping and rotating speeds of the first driving motor 703 and the second driving motor 7085, so that the wires can be wound conveniently. The driving mechanism 708 comprises a second fixing plate 7081 arranged in the second placing groove 6, a second rotating shaft 7082 is arranged on the second fixing plate 7081, a worm wheel 7083 is arranged at one end of the second rotating shaft 7082, a worm 7084 is matched with one side of the worm wheel 7083, the bottom end of the worm 7084 is rotationally connected with the bottom of the second placing groove 6, a second driving motor 7085 is arranged at the top end of the worm 7084, a connecting plate 7086 is connected to the other end of the second rotating shaft 7082, an annular sliding block 7087 is connected to the tail end of the connecting plate 7086, and the annular sliding block 7087 is in sliding connection with the annular groove 707. The first driving motor 703 drives the first rotating shaft 702 to rotate, the clamping strip 706 and the sliding groove 705 are matched to drive the connecting cylinder 704 to rotate together, so that the winding drum 709 is driven to rotate, the second driving motor 7085 drives the worm 7084 to rotate, the connecting plate 7086 is driven to move left and right under the matching of the worm wheel 7083, and the annular sliding block 7087 and the annular groove 707 can give a force to the connecting cylinder 704 in the left and right direction when the connecting plate 7086 moves left and right, so that the annular sliding block 7087 can drive the winding drum 709 to move back and forth when moving in the annular groove 707, the position of the winding drum 709 is changed, and the wires can be uniformly distributed on the winding drum 709 during winding.

As shown in fig. 5, a snap ring 711 is provided at one end of the spool 709, the snap ring 711 cooperates with a first clamping groove 712 provided on the connecting cylinder 704, a plurality of annular clamping grooves 713 are provided on the outer wall of the spool 709, and sponge pads 714 are provided on both sides of the inner wall of the annular clamping grooves 713. The snap ring 711 is engaged with the first slot 712, which facilitates the removal or installation of the spool 709 from the connecting cylinder 704, and the engagement of the annular slot 713 with the foam-rubber cushion 714 secures the head of the wire, thereby facilitating the connection of the wire to the spool 709, and thus facilitating the wire winding operation.

As shown in fig. 7, the wire fixing mechanism 9 includes a wire fixing plate 901, a plurality of openings 902 are formed in the wire fixing plate 901, extension springs 903 are arranged on two sides of the inner wall of each opening 902, an arc-shaped pressing plate 904 is arranged at the tail end of each extension spring 903, the openings 902 can limit wires, and uneven distribution of the wires on a winding drum 709 during winding is reduced. The wires comprise output connecting wires, protection ground wires and the like, the thickness of the wires is different, and the wires with different thicknesses are convenient to limit and fix through the matching of the set telescopic springs 903 and the arc-shaped pressing plates 904.

When the device is used, the box door 4 is opened, the placing drawer 3 is pulled out, various devices required by detection are taken out and connected into a power grid according to requirements, and a fault line is detected, so that the place where the fault occurs is judged; after detection, the components such as a sensor and a receiver are placed in the first placing groove 5, a wire hanging rod is inserted into the third placing groove 10, then a wire passes through the opening 902, the head of the wire is clamped into the annular clamping groove 713, and then the first driving motor 703 and the second driving motor 7085 are driven and controlled by the controller 710 to start, so that the winding drum 709 is driven to rotate and move, and automatic winding work is carried out. The rotation speeds of the first driving motor 703 and the second driving motor 7085 can be controlled and regulated by the controller 710, and when the winding drum 709 only needs to wind one wire, the rotation speeds of the first driving motor 703 and the second driving motor 7085 can be increased at this time, so that the rotation speed and the movement speed of the winding drum 709 are increased, and one wire can be uniformly wound on the winding drum 709; when the spool 709 needs to wind a plurality of wires at the same time, the rotation speed of the first driving motor 703 and the second driving motor 7085 can be reduced to reduce the rotation speed and the moving speed of the spool 709, so that the spool 709 can be partitioned, and the plurality of wires can be uniformly and independently wound on the spool 709. After the rolling is finished, the placing drawer 3 and the box door 4 are closed.

In summary, a high-resistance grounding detection method for a 10kV distribution line comprises the following steps:

step one, taking out various devices from a placement box 1, accessing the devices into a power grid system through wires according to connection requirements, and taking out the sensors to be connected into the power grid system through a wire hanging rod;

step two, the transmitter 2 applies voltage to the fault line to enable the fault to reappear, and the current enters the ground at the grounding point and returns to the transmitter 2 through the ground;

step three, the sensor detects a line current signal of a fault line and transmits data to a receiver on the ground in a wireless mode;

step four, a receiver receives the wireless signals sent by the sensor, and the wireless signals are displayed on a liquid crystal screen after being analyzed;

if the fault point is in front of the measurement position, the current continuously exists;

if the fault point is behind the measurement location, the current disappears.

The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.

Claims (4)

1. The high-resistance grounding detection device for the 10kV distribution line comprises a placement box (1) and is characterized in that a box door (4) is movably connected to the placement box (1), a transmitter (2) is arranged in the placement box (1), and a placement drawer (3) is slidably connected to the placement box (1) and located below the transmitter (2);

a first placing groove (5) for placing a sensor and a receiver component is formed in the placing drawer (3), a second placing groove (6) for accommodating various connecting wires is formed in one side of the first placing groove (5) in the placing drawer (3), a wire collecting mechanism (7) is arranged in the second placing groove (6), a slot (8) is formed in the outer side of the second placing groove (6), a wire fixing mechanism (9) is arranged in the slot (8), and a third placing groove (10) for accommodating a wire hanging rod is further formed in the lower portion of the second placing groove (6);

the wire winding mechanism (7) comprises a first fixing plate (701) arranged in a second placing groove (6), a first rotating shaft (702) is arranged on the first fixing plate (701), a first driving motor (703) used for driving is arranged on one side of the first rotating shaft (702), a connecting cylinder (704) is arranged on the outer wall of the other side of the first rotating shaft (702), two sliding grooves (705) are arranged on the inner wall of the connecting cylinder (704), the sliding grooves (705) are in sliding connection with clamping strips (706) arranged on the outer wall of the first rotating shaft (702), an annular groove (707) is arranged on the outer wall of the connecting cylinder (704), a driving mechanism (708) is arranged in the annular groove (707), a winding drum (709) used for containing wires is detachably connected to the tail end of the connecting cylinder (704), and a controller (710) is arranged on one side of the first fixing plate (701) located on the first rotating shaft (702).

The driving mechanism (708) comprises a second fixing plate (7081) arranged in the second placing groove (6), a second rotating shaft (7082) is arranged on the second fixing plate (7081), a worm wheel (7083) is arranged at one end of the second rotating shaft (7082), a worm (7084) is matched with one side of the worm wheel (7083), the bottom end of the worm (7084) is rotatably connected with the bottom of the second placing groove (6), and a second driving motor (7085) is arranged at the top end of the worm (7084);

a connecting plate (7086) is connected to the other end of the second rotating shaft (7082), an annular sliding block (7087) is connected to the tail end of the connecting plate (7086), and the annular sliding block (7087) is in sliding connection with the annular groove (707).

2. The high-resistance grounding detection device for the 10kV distribution line according to claim 1, wherein a clamping ring (711) is arranged at one end of the winding drum (709), the clamping ring (711) is matched with a first clamping groove (712) arranged on the connecting cylinder (704), a plurality of annular clamping grooves (713) are formed in the outer wall of the winding drum (709), and sponge pads (714) are arranged on two sides of the inner wall of the annular clamping groove (713).

3. The high-resistance grounding detection device for the 10kV distribution line according to claim 1, wherein the wire fixing mechanism (9) comprises a wire fixing plate (901), a plurality of holes (902) are formed in the wire fixing plate (901), telescopic springs (903) are arranged on two sides of the inner wall of each hole (902), and arc-shaped pressing plates (904) are arranged at the tail ends of the telescopic springs (903).

4. A method for detecting high-resistance grounding of a 10kV distribution line, which adopts a device for detecting high-resistance grounding of a 10kV distribution line according to any one of claims 1 to 3, and is characterized in that the method comprises the following steps:

step one, taking out various devices from a placement box (1), accessing the devices into a power grid system through wires according to connection requirements, and taking out the sensors to be connected into the power grid system through a wire hanging rod;

step two, the transmitter (2) applies voltage to the fault line to enable faults to reappear, and current enters the ground at the grounding point and returns to the transmitter (2) through the ground;

step three, the sensor detects a line current signal of a fault line and transmits data to a receiver on the ground in a wireless mode;

step four, the receiver receives the wireless signals sent by the sensor, and the wireless signals are displayed on a liquid crystal screen of the receiver after being analyzed;

if the fault point is in front of the measurement position, the current continuously exists;

if the fault point is behind the measurement location, the current disappears.