CN216847990U

CN216847990U - Single-phase earth fault test equipment for site

Info

Publication number: CN216847990U
Application number: CN202123102992.3U
Authority: CN
Inventors: 郁寅锋; 王聪; 柴小亮; 李海璇; 安春亮; 王彦博; 张子静; 张子航; 梁晓晖
Original assignee: Baoding City Weida Electric Power Equipment Co ltd
Current assignee: Baoding City Weida Electric Power Equipment Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-06-28
Anticipated expiration: 2031-12-08

Abstract

The utility model discloses a single-phase earth fault test device used for site, which comprises a transmitter, a high-precision open current transformer and a driving device, wherein the high-precision open current transformer is fixed with the driving device; a control box is fixed at the bottom end of the high-precision open current transformer, a battery pack and a controller are installed in the control box, and the high-precision open current transformer is electrically connected with the controller; the driving device comprises a positioning frame and a driving mechanism, the driving mechanism is arranged corresponding to the fault line, the battery pack is used for supplying power to the driving mechanism and the controller, and the driving mechanism is electrically connected with the controller. The utility model discloses utilize the transmitter to send test current signal to the fault circuit in, through the current signal among the high accuracy opening current transformer inductive circuit to utilize opening and close of controller control drive arrangement, can judge out the trouble interval by high accuracy opening current transformer's position, improve the efficiency of failure testing.

Description

Single-phase earth fault test equipment for site

Technical Field

The utility model relates to an electric power system technical field especially relates to a single-phase earth fault test equipment for scene.

Background

The power system can be divided into a large-current grounding system (including direct grounding, reactance grounding and low-resistance grounding) and a small-current grounding system (including high-resistance grounding, arc suppression coil grounding and ungrounded) according to a grounding processing mode. The 3-63 kV power system in China mostly adopts an operation mode that a neutral point is not grounded or is grounded through an arc suppression coil, namely a low-current grounding system.

In a low-current grounding system, single-phase grounding is a common temporary fault, and occurs in humid and rainy weather. When a single-phase earth fault occurs, although the system can continue to operate, the non-fault phase-to-earth voltage rises during the earthing process, but if the power grid operates for a long time during the single-phase earth fault, the insulation weak link is broken down and develops into an interphase short circuit, so that the accident is expanded, and the normal power utilization of users is influenced. Therefore, when a single-phase earth fault occurs, the fault line needs to be found in time through single-phase earth fault testing equipment, and the current value scheduling and relevant responsible personnel need to be reported quickly to process the fault. The existing single-phase earth fault test equipment is time-consuming and labor-consuming in the test process and low in efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a single-phase earth fault test equipment for scene to solve the problem that above-mentioned prior art exists.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a single-phase earth fault test equipment for scene, including transmitter, high accuracy opening current transformer and drive arrangement, the transmitter is used for injecting test current signal into trouble circuit, high accuracy opening current transformer with the drive arrangement fixed connection, and the trouble circuit passes high accuracy opening current transformer, drive arrangement in proper order; the bottom end of the high-precision open-circuit current transformer is fixedly connected with a control box, a battery pack and a controller are installed in the control box, and the high-precision open-circuit current transformer is electrically connected with the controller; the driving device comprises a positioning frame and a driving mechanism arranged on the positioning frame, the driving mechanism is arranged corresponding to the fault line, the battery pack is used for supplying power to the driving mechanism and the controller, and the driving mechanism is electrically connected with the controller.

Preferably, the positioning frame comprises a cross beam, the bottom end of the cross beam is connected with two driving arms in a sliding manner, a positioning sliding plate is fixed in the middle of the bottom end of the cross beam, the two driving arms are arranged in a mirror symmetry manner relative to the positioning sliding plate, and the driving mechanisms are arranged on the two driving arms; the beam is provided with two adjusting parts, and the two driving arms are respectively in limit fit with the two adjusting parts; the bottom end of the driving arm is provided with a connecting plate, one end of the connecting plate is hinged with one driving arm, and the other end of the connecting plate is detachably connected with the other driving arm.

Preferably, sliding grooves are formed in two ends of the bottom surface of the cross beam, and the top end of the driving arm is connected in the sliding grooves in a sliding mode; the adjusting part comprises a guide rod and a screw rod, the guide rod and the screw rod are both arranged in the sliding groove, two through holes are formed in the cross beam, one end of the guide rod is rotatably connected with the groove wall of the sliding groove through one through hole, the other end of the guide rod is detachably connected with the cross beam, one end of the screw rod is fixedly connected with a handle, and the other end of the screw rod penetrates through the other through hole to be rotatably connected with the groove wall of the sliding groove; the top of the driving arm is provided with two connecting holes, the driving arm is connected with the guide rod in a sliding manner through one connecting hole, and the driving arm is in clearance fit with the screw rod through the other connecting hole; the sliding groove is internally provided with a sliding block in a sliding manner, the guide rod and the screw rod penetrate through the sliding block and are connected with the sliding block in a sliding manner, the screw rod is connected with the sliding block in a threaded manner, and the sliding block is positioned between the driving arm and the handle.

Preferably, one end of the guide rod, which is close to the sliding block, is fixedly connected with a connecting cylinder, the outer wall of the connecting cylinder is provided with threads, and the connecting cylinder is in threaded connection with the cross beam.

Preferably, the driving mechanism includes a motor and a driving roller, the motor is fixed on one side of the driving arm far away from the positioning sliding plate, a mounting groove is formed on one side of the driving arm close to the positioning sliding plate, a rotating shaft is rotatably connected in the mounting groove, the driving roller is fixedly sleeved on the rotating shaft, and the driving roller is arranged corresponding to the fault line; a driven wheel is fixedly sleeved on the rotating shaft, a driving wheel is fixed on an output shaft of the motor, a communicating hole is formed in the driving arm, the communicating hole is communicated with the mounting groove, and the driving wheel is in transmission fit with the driven wheel through a chain; the motor is connected with the battery pack in series, an electromagnetic switch is connected between the motor and the battery pack in series, and the electromagnetic switch is electrically connected with the controller.

Preferably, a long hole is formed in the connecting plate, a threaded hole is formed in the bottom end of the driving arm detachably connected with the connecting plate, a bolt penetrates through the long hole, and the connecting plate and the driving arm are detachably connected through the bolt and the threaded hole.

Preferably, the positioning sliding plate is an arc-shaped plate, the bottom end of the positioning sliding plate is fixedly connected with a plurality of ball seats, and the ball seats are in sliding connection with the fault line.

Preferably, the outer wall of the driving roller is provided with anti-skid grains.

The utility model discloses a following technological effect: the utility model provides a single-phase earth fault test equipment for it is on-spot, utilize the transmitter to send test current signal to fault circuit in, when high accuracy opening current transformer senses current signal, controller control drive arrangement starts, utilize drive arrangement drive high accuracy opening current transformer to remove along trouble circuit, when removing trouble point department, current signal is not sensed to high accuracy opening current transformer, controller control drive arrangement stops the drive, can judge out the trouble interval by the position of high accuracy opening current transformer this moment, improve the efficiency of failure test.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the single-phase earth fault testing device of the present invention;

fig. 2 is a schematic structural view of the driving device of the present invention;

FIG. 3 is a schematic diagram of the circuit relationship of the present invention;

the device comprises a transmitter-1, a high-precision open current transformer-2, a control box-3, a battery pack-4, a controller-5, a beam-6, a driving arm-7, a positioning sliding plate-8, a connecting plate-9, a sliding chute-10, a guide rod-11, a screw rod-12, a handle-13, a sliding block-14, a connecting cylinder-15, a motor-16, a driving roller-17, a mounting groove-18, a rotating shaft-19, a driven wheel-20, a driving wheel-21, an electromagnetic switch-22, a bolt-23 and an alarm unit-24.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The utility model provides a single-phase earth fault test equipment for scene, including transmitter 1, high accuracy opening current transformer 2 and drive arrangement, transmitter 1 is used for injecting test current signal into the trouble circuit, and high accuracy opening current transformer 2 is fixed connection with the drive arrangement, and the trouble circuit passes high accuracy opening current transformer 2, drive arrangement in proper order; the bottom end of the high-precision open current transformer 2 is fixedly connected with a control box 3, a battery pack 4 and a controller 5 are installed in the control box 3, and the high-precision open current transformer 2 is electrically connected with the controller 5; the driving device comprises a positioning frame and a driving mechanism arranged on the positioning frame, the driving mechanism is arranged corresponding to the fault line, the battery pack 4 is used for supplying power to the driving mechanism and the controller 5, and the driving mechanism is electrically connected with the controller 5.

Furthermore, in order to drive the high-precision open current transformer 2 to move on a fault line, the positioning frame comprises a cross beam 6, the bottom end of the cross beam 6 is connected with two driving arms 7 in a sliding mode, a positioning sliding plate 8 is fixed in the middle of the bottom end of the cross beam 6, the two driving arms 7 are arranged in a mirror symmetry mode relative to the positioning sliding plate 8, and driving mechanisms are arranged on the two driving arms 7; two adjusting parts are arranged on the cross beam 6, and two driving arms 7 are respectively in limit fit with the two adjusting parts; the bottom end of the driving arm 7 is provided with a connecting plate 9, one end of the connecting plate 9 is hinged with one driving arm 7, and the other end of the connecting plate 9 is detachably connected with the other driving arm 7.

Furthermore, in order to adjust the distance between the two driving arms 7 conveniently and enable the driving device to be suitable for lines with different thicknesses, sliding grooves 10 are formed in two ends of the bottom surface of the cross beam 6, and the top ends of the driving arms 7 are connected in the sliding grooves 10 in a sliding mode; the adjusting part comprises a guide rod 11 and a screw 12, the guide rod 11 and the screw 12 are both arranged in the chute 10, two through holes are formed in the cross beam 6, one end of the guide rod 11 is rotatably connected with the chute wall of the chute 10 through one through hole, the other end of the guide rod 11 is detachably connected with the cross beam 6, one end of the screw 12 is fixedly connected with a handle 13, and the other end of the screw 12 penetrates through the other through hole to be rotatably connected with the chute wall of the chute 10; the top of the driving arm 7 is provided with two connecting holes, the driving arm 7 is connected with the guide rod 11 in a sliding way through one connecting hole, and the driving arm 7 is in clearance fit with the screw 12 through the other connecting hole; the sliding chute 10 is connected with a sliding block 14 in a sliding mode, the guide rod 11 and the screw 12 both penetrate through the sliding block 14, the guide rod 11 is connected with the sliding block 14 in a sliding mode, the screw 12 is connected with the sliding block 14 in a threaded mode, and the sliding block 14 is located between the driving arm 7 and the handle 13.

Further, for the convenience is dismantled guide bar 11, be close to slider 14 one end fixedly connected with connecting cylinder 15 at guide bar 11, connecting cylinder 15 outer wall is seted up threadedly, connecting

cylinder

15 and 6 threaded connection of crossbeam.

Furthermore, in order to conveniently control the driving device to drive the high-precision open current transformer 2, the driving mechanism comprises a motor 16 and a driving roller 17, the motor 16 is fixed on one side of the driving arm 7, which is far away from the positioning sliding plate 8, a mounting groove 18 is formed in one side of the driving arm 7, which is close to the positioning sliding plate 8, a rotating shaft 19 is rotatably connected in the mounting groove 18, the driving roller 17 is fixedly sleeved on the rotating shaft 19, and the driving roller 17 is arranged corresponding to a fault line; a driven wheel 20 is fixedly sleeved on the rotating shaft 19, a driving wheel 21 is fixed on an output shaft of the motor 16, a communicating hole is formed in the driving arm 7 and communicated with the mounting groove 18, and the driving wheel 21 is in transmission fit with the driven wheel 20 through a chain; the motor 16 is connected in series with the battery pack 4, an electromagnetic switch 22 is connected in series between the motor 16 and the battery pack 4, and the electromagnetic switch 22 is electrically connected with the controller 5.

Furthermore, a long hole is formed in the connecting plate 9, a threaded hole is formed in the bottom end of the driving arm 7 detachably connected with the connecting plate 9, a bolt 23 penetrates through the long hole, and the connecting plate 9 and the driving arm 7 are detachably connected through the bolt 23 and the threaded hole.

Further, in order to reduce the friction between the positioning sliding plate 8 and the fault line, so as to better utilize the driving device to drive the high-precision open current transformer 2, the positioning sliding plate 8 is an arc-shaped plate, the bottom end of the positioning sliding plate 8 is fixedly connected with a plurality of ball seats, and the ball seats are connected with the fault line in a sliding manner.

Further, in order to avoid slipping between the driving roller 17 and a fault line and influence the driving effect on the high-precision open current transformer 2, anti-slip lines are arranged on the outer wall of the driving roller 17.

The utility model provides a single-phase earth fault test equipment for scene, when using, with transmitter 1 fixed to fault line department back, utilize transmitter 1 to pour into test current signal into to fault line, install high accuracy opening current transformer 2 and drive arrangement on fault line for fault line passes high accuracy opening current transformer 2. When the driving device is installed, one end of the connecting plate 9 is separated from the driving arm 7, the driving device is installed on a fault line by utilizing the opening, and the positioning slide plate 8 is contacted with a fault line, the position of the driving arm 7 on the beam 6 is adjusted, the driving roller 17 on the driving arm 7 is abutted with the fault line, then the screw 12 is rotated through the handle 13, the slide block 14 in the slide groove 10 moves along the guide rod 11 until the slide block 14 contacts with the driving arm 7, the slide block 14 plays a role in positioning the driving arm 7, after the position of the driving arm 7 is adjusted, the connecting plate 9 is connected with the driving arm 7 through the bolt 23, because the control box 3 is arranged at the bottom end of the high-precision open current transformer 2, the battery pack 4 in the control box 3 is utilized to play a role of counterweight, so as to keep the high-precision open current transformer 2 and the driving device balanced on the fault line. Then the transmitter 1 and the high-precision open current transformer 2 are started, when current flows through a fault line, the high-precision open current transformer 2 can sense a current signal and send the current signal to the controller 5, the controller 5 controls the electromagnetic switch 22 to be closed after receiving an electric signal sent by the high-precision open current transformer 2, the electric energy of the battery pack 4 can be transmitted to the motor 16, the motor 16 drives the driving wheel 21 to rotate, the driving wheel 21 drives the driven wheel 20 to rotate by using a chain, the driven wheel 20 drives the rotating shaft 19 and the driving roller 17 to rotate, so that the motor 16 drives the driving roller 17, the high-precision open current transformer 2 is moved along the fault line by using the driving roller 17, when the high-precision open current transformer 2 moves to a ground fault point, the high-precision open current transformer 2 cannot sense the current signal, and the controller 5 does not receive the electric signal transmitted by the high-precision open current transformer 2, thereby controller 5 control electromagnetic switch 22 opens, and motor 16 stops work, and high accuracy opening current transformer 2 stops to remove, and the position that high accuracy opening current transformer 2 was located this moment is the fault area promptly to reduce the fault area, improve the efficiency of fault detection, the controller 5 of this embodiment adopts the singlechip of STM32F101RB model to realize.

Further, an alarm unit 24 is installed at the bottom end of the control box 3, the alarm unit 24 can be a buzzer or a light alarm, when the high-precision open current transformer 2 does not sense a current signal, the controller 5 controls the electromagnetic switch 22 to be turned on and simultaneously sends an alarm signal to the alarm unit 24, and the alarm unit 24 can prompt a worker to complete the test.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The single-phase earth fault testing equipment for the site is characterized by comprising a transmitter (1), a high-precision open current transformer (2) and a driving device, wherein the transmitter (1) is used for injecting a testing current signal into a fault line, the high-precision open current transformer (2) is fixedly connected with the driving device, and the fault line sequentially penetrates through the high-precision open current transformer (2) and the driving device; the bottom end of the high-precision open current transformer (2) is fixedly connected with a control box (3), a battery pack (4) and a controller (5) are installed in the control box (3), and the high-precision open current transformer (2) is electrically connected with the controller (5); the driving device comprises a positioning frame and a driving mechanism arranged on the positioning frame, the driving mechanism is arranged corresponding to the fault line, the battery pack (4) is used for supplying power to the driving mechanism and the controller (5), and the driving mechanism is electrically connected with the controller (5).

2. The single-phase ground fault test equipment for the site according to claim 1, wherein the positioning frame comprises a cross beam (6), two driving arms (7) are slidably connected to the bottom end of the cross beam (6), a positioning sliding plate (8) is fixed to the middle of the bottom end of the cross beam (6), the two driving arms (7) are arranged in mirror symmetry with respect to the positioning sliding plate (8), and the driving mechanisms are mounted on the two driving arms (7); the beam (6) is provided with two adjusting parts, and the two driving arms (7) are respectively in limit fit with the two adjusting parts; the bottom end of the driving arm (7) is provided with a connecting plate (9), one end of the connecting plate (9) is hinged to the driving arm (7), and the other end of the connecting plate (9) is detachably connected with the other driving arm (7).

3. The single-phase ground fault test equipment for the site according to claim 2, wherein sliding grooves (10) are formed at two ends of the bottom surface of the cross beam (6), and the top ends of the driving arms (7) are slidably connected in the sliding grooves (10); the adjusting piece comprises a guide rod (11) and a screw rod (12), the guide rod (11) and the screw rod (12) are both arranged in the sliding groove (10), two through holes are formed in the cross beam (6), one end of the guide rod (11) is rotatably connected with the groove wall of the sliding groove (10) through one through hole, the other end of the guide rod (11) is detachably connected with the cross beam (6), one end of the screw rod (12) is fixedly connected with a handle (13), and the other end of the screw rod (12) penetrates through the other through hole to be rotatably connected with the groove wall of the sliding groove (10); the top of the driving arm (7) is provided with two connecting holes, the driving arm (7) is in sliding connection with the guide rod (11) through one connecting hole, and the driving arm (7) is in clearance fit with the screw rod (12) through the other connecting hole; the sliding block (14) is connected in the sliding groove (10) in a sliding mode, the guide rod (11) and the screw rod (12) penetrate through the sliding block (14), the guide rod (11) is connected with the sliding block (14) in a sliding mode, the screw rod (12) is connected with the sliding block (14) in a threaded mode, and the sliding block (14) is located between the driving arm (7) and the handle (13).

4. The single-phase ground fault test equipment for the field according to claim 3, wherein a connecting cylinder (15) is fixedly connected to one end of the guide rod (11) close to the sliding block (14), the outer wall of the connecting cylinder (15) is threaded, and the connecting cylinder (15) is in threaded connection with the cross beam (6).

5. The single-phase ground fault testing equipment for the site is characterized in that the driving mechanism comprises a motor (16) and a driving roller (17), the motor (16) is fixed on one side of the driving arm (7) far away from the positioning sliding plate (8), one side of the driving arm (7) close to the positioning sliding plate (8) is provided with a mounting groove (18), a rotating shaft (19) is rotatably connected to the mounting groove (18), the driving roller (17) is fixedly sleeved on the rotating shaft (19), and the driving roller (17) is arranged corresponding to the fault line; a driven wheel (20) is fixedly sleeved on the rotating shaft (19), a driving wheel (21) is fixed on an output shaft of the motor (16), a communicating hole is formed in the driving arm (7), the communicating hole is communicated with the mounting groove (18), and the driving wheel (21) is in transmission fit with the driven wheel (20) through a chain; the motor (16) is connected with the battery pack (4) in series, an electromagnetic switch (22) is connected between the motor (16) and the battery pack (4) in series, and the electromagnetic switch (22) is electrically connected with the controller (5).

6. The single-phase earth fault test equipment for the site according to claim 2, wherein the connecting plate (9) is provided with a long hole, the bottom end of the driving arm (7) detachably connected with the connecting plate (9) is provided with a threaded hole, a bolt (23) is arranged in the long hole in a penetrating manner, and the connecting plate (9) and the driving arm (7) are detachably connected through the bolt (23) and the threaded hole.

7. The single-phase earth fault test equipment for on-site use according to claim 2, characterized in that the positioning slide plate (8) is an arc-shaped plate, and a plurality of ball seats are fixedly connected to the bottom end of the positioning slide plate (8), and are slidably connected with the fault line.

8. The single-phase ground fault testing device for the field according to claim 5, wherein the outer wall of the driving roller (17) is provided with anti-skid lines.