Rapid detection device for partial discharge of transformer substation

Abstract

The invention relates to the field of transformer substation detection equipment, in particular to a transformer substation partial discharge rapid detection device which comprises a detection trolley body, an equipment installation cavity is formed in the detection trolley body, an ultrasonic partial discharge detector is arranged in the equipment installation cavity, and L-shaped plates are arranged on the two sides of the detection trolley body. The L-shaped plate comprises a connecting part parallel to the side wall of the detection trolley body, the upper end part of the connecting part is vertically provided with a mounting part, the mounting part is provided with two groups of electric push rods, the two groups of electric push rods are arranged at intervals along the length direction of the side wall of the detection trolley body, and piston rods of the electric push rods downwards extend out of the mounting part; the end, extending out of the mounting part, of the piston rod is connected with a rubber roller which is provided with a roller driving mechanism used for driving the rubber roller to rotate. According to the invention, the maintenance personnel are well protected, and the accuracy of the discharge detection of the substation equipment is well improved at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of substation detection equipment, and particularly relates to a rapid detection device for partial discharge in a substation. Background Art

[0002] A substation refers to a place in the power system where voltage and current are transformed, and electric energy is received and distributed. The substation in a power plant is a step-up substation, and its function is to step up the electric energy generated by the generator and feed it into the high-voltage power grid.

[0003] Partial discharge is a common fault of high-voltage electrical equipment in current substations. The common method for positioning and detecting partial discharge of all electrical equipment in a substation is the ultrasonic method. When in use, maintenance personnel need to hold an ultrasonic partial discharge detector for detection. The principle of the ultrasonic partial discharge detector is to use the basic principle that ultrasonic waves propagate in a straight line in the air, and an air-coupled ultrasonic sensor is used to collect ultrasonic signals in the corresponding frequency band, and the position of the partial discharge source is located through the intensity of the received ultrasonic signals.

[0004] However, the ultrasonic partial discharge detector has the following problems: Due to the complex equipment in the substation, during detection, maintenance personnel cannot detect the gaps between equipment well; moreover, maintenance personnel sometimes need to climb to high places to detect the equipment at high places in the substation, which poses a great safety hazard; and if there is a equipment failure in the substation, it may cause harm to maintenance personnel. Therefore, the current equipment for partial discharge positioning detection in a substation cannot fully meet the effective detection of all electrical equipment in the substation. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid detection device for partial discharge in a substation to overcome the defects existing in the above-mentioned prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] On the one hand, the present invention provides a rapid detection device for partial discharge in a substation, including a detection trolley body. An inclined surface is provided on one side wall of the detection trolley body along its length direction. An equipment installation cavity is provided in the detection trolley body, and an ultrasonic partial discharge detector is provided in the equipment installation cavity. L-shaped plates are provided on both sides of the detection trolley body along its width direction. The L-shaped plate includes a connecting portion parallel to the side wall of the detection trolley body, and an installation portion is vertically provided at the upper end of the connecting portion. Two groups of electric push rods are provided at the installation portion. The two groups of electric push rods are arranged at intervals along the length direction of the side wall of the detection trolley body. The electric push rod includes a telescopic piston rod. The piston rod of the electric push rod extends downward out of the installation portion, and a rubber roller is connected to the end of the piston rod extending out of the installation portion. A roller driving mechanism for driving the rubber roller to rotate is provided at the rubber roller.

[0008] Further, a roller mounting bracket for mounting rubber rollers is connected to the piston rod of the electric push rod.

[0009] Further, the roller driving mechanism includes a first reduction gearbox arranged at the roller mounting bracket. The output shaft of the first reduction gearbox is connected to the rotating shaft of the rubber roller, and a first motor is connected to the input shaft of the first reduction gearbox.

[0010] Further, a roller steering mechanism for driving the roller mounting bracket to rotate is provided between the piston rod of the electric push rod and the roller mounting bracket; an installation plate is provided at the end of the piston rod, an installation bracket is provided at the installation plate, a connecting rod is rotatably provided at the installation bracket, and the lower end of the connecting rod extends out of the installation bracket and is connected to the roller mounting bracket.

[0011] Further, the roller steering mechanism includes a first bevel gear arranged at the connecting rod. A second reduction gearbox is provided on the side wall of the installation bracket. The output shaft of the second reduction gearbox extends into the installation bracket. A second bevel gear meshing with the first bevel gear is provided at the end of the output shaft of the second reduction gearbox extending into the installation bracket; a second motor is connected to the input shaft of the second reduction gearbox.

[0012] Further, two oppositely arranged rotating rods are provided in the detection trolley body. A strip-shaped through hole is provided on the side wall of the detection trolley body and near the rotating rod. The end of the L-shaped plate passes through the strip-shaped through hole and is connected to the rotating rod. A rotating rod driving mechanism for driving the rotating rod to rotate so that the L-shaped plate rotates is also provided on the detection trolley body.

[0013] Further, a first toothed ring is provided on the outer side wall of the rotating rod. The rotating rod driving mechanism includes a driving rod rotatably arranged in the detection trolley body. A second toothed ring meshing with the first toothed ring is provided on the driving rod; the rotating rod driving mechanism further includes a third reduction gearbox arranged in the detection trolley body. The output shaft of the third reduction gearbox is connected to the driving rod, and a third motor is connected to the output shaft of the third reduction gearbox.

[0014] Further, the rotating rod is fixedly connected to the first toothed ring.

[0015] Further, two partition plates are provided in the detection trolley body. The two partition plates divide the interior of the detection trolley body into an equipment installation cavity and rotating rod installation cavities on both sides of the equipment installation cavity.

[0016] Further, the rotating rod is arranged in the rotating rod installation cavity.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] By arranging an ultrasonic partial discharge detector on the detection trolley body, the present invention can drive the detection trolley body to detect the gaps between substation equipment and can also drive the detection trolley body to climb the bottom columns of substation equipment, thereby realizing the discharge detection of high-altitude equipment in the substation. This not only avoids maintenance personnel from entering the substation but also realizes the detection of equipment gaps and high-altitude equipment in the substation, thus better protecting maintenance personnel and simultaneously better improving the accuracy of discharge detection for substation equipment. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the partial discharge rapid detection device for a substation in Embodiment 1;

[0020] Figure 2 For Figure 1 It is a cross-sectional view of the partial discharge rapid detection device for a substation in

[0021] Figure 3 For Figure 2 It is an enlarged view of part A in

[0022] Figure 4 For Figure 1 It is a rear view of the partial discharge rapid detection device for a substation in

[0023] Figure 5 For Figure 1 It is a usage schematic diagram of the partial discharge rapid detection device for a substation in

[0024] Figure 6 It is a framework diagram of the control system in the partial discharge rapid detection device for a substation in Embodiment 1;

[0025] In the figure, the reference numerals are: 100, detection trolley body; 110, L-shaped plate; 120, rubber roller; 111, connecting part; 112, mounting part; 130, inclined surface; 210, equipment installation cavity; 220, electric push rod; 230, rotating rod; 240, strip-shaped through hole; 250, first gear ring; 260, driving rod; 270, second gear ring; 280, partition board; 290, rotating rod installation cavity; 310, roller mounting frame; 320, first reduction gearbox; 330, first motor; 340, mounting plate; 350, mounting bracket; 360, connecting rod; 370, first bevel gear; 380, second reduction gearbox; 390, second bevel gear; 3100, second motor; 410, third reduction gearbox; 420, third motor. Detailed Embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1:

[0028] As Figure 1 Figure 2 shown, this embodiment provides a rapid partial discharge detection device for a substation, which includes a detection trolley body 100. An inclined surface 130 is provided on one side wall of the detection trolley body 100 along its length direction. An equipment installation cavity 210 is provided in the detection trolley body 100, and an ultrasonic partial discharge detector is provided in the equipment installation cavity 210. L-shaped plates 110 are provided on both sides of the detection trolley body 100 along its width direction. The L-shaped plate 110 includes a connecting portion 111 arranged parallel to the side wall of the detection trolley body 100. A mounting portion 112 is vertically provided at the upper end of the connecting portion 111. Two sets of electric push rods 220 are provided at the mounting portion 112. The two sets of electric push rods 220 are arranged at intervals along the length direction of the side wall of the detection trolley body 100. The piston rod of the electric push rod 220 extends downward out of the mounting portion 112. A rubber roller 120 is connected to the end of the piston rod extending out of the mounting portion 112. A roller driving mechanism for driving the rubber roller 120 to rotate is provided at the rubber roller 120.

[0029] During use, the detection trolley body 100 is placed at the substation. Subsequently, the rubber roller 120 is driven to roll through the roller driving mechanism, and the equipment of the substation can be detected by the ultrasonic partial discharge detector. Through the setting of the electric push rod 220, when detecting the equipment gap in the substation, when the detection trolley body 100 is too high, the electric push rod 220 can be retracted, so that the overall height of the detection trolley body 100 is reduced, so that the detection trolley body 100 can better pass through the equipment gap of the substation, and the applicability of the rapid partial discharge detection device for the substation is better improved.

[0030] The rapid partial discharge detection device for the substation in this embodiment can detect the discharge of the equipment in the substation through the setting of the detection trolley body 100. Compared with the method of maintenance personnel entering the substation with a detector in hand, it avoids harm to the maintenance personnel and better protects the maintenance personnel. At the same time, through the setting of the electric push rod 220, the passing performance of the detection trolley body 100 is better improved, and thus the applicability of the rapid partial discharge detection device for the substation is better improved.

[0031] Combined with Figure 3As shown, a roller mounting bracket 310 for mounting a rubber roller 120 is connected to the piston rod of the electric push rod 220. The roller drive mechanism includes a first reduction gearbox 320 disposed at the roller mounting bracket 310. The output shaft of the first reduction gearbox 320 is connected to the rotating shaft of the rubber roller 120, and a first motor 330 is connected to the input shaft of the first reduction gearbox 320.

[0032] In this embodiment, through the setting of the roller drive mechanism, the rubber roller 120 can be driven to roll by controlling the first motor 330, so that the driving of the rubber roller 120 is realized more conveniently.

[0033] In this embodiment, a roller steering mechanism for driving the roller mounting bracket 310 to rotate is further provided between the piston rod of the electric push rod 220 and the roller mounting bracket 310; an installation plate 340 is provided at the end of the piston rod, an installation bracket 350 is provided at the installation plate 340, a connecting rod 360 is rotatably provided at the installation bracket 350, and the lower end of the connecting rod 360 extends out of the installation bracket 350 and is connected to the roller mounting bracket 310; the roller steering mechanism includes a first bevel gear 370 provided at the connecting rod 360, a second reduction gearbox 380 is provided at the side wall of the installation bracket 350, the output shaft of the second reduction gearbox 380 extends into the installation bracket 350, and a second bevel gear 390 meshing with the first bevel gear 370 is provided at the end of the output shaft of the second reduction gearbox 380 extending into the installation bracket 350; a second motor 3100 is connected to the input shaft of the second reduction gearbox 380.

[0034] In this embodiment, through the setting of the roller steering mechanism, the rubber roller 120 can be driven to turn by the second motor 3100, so that the turning of the detection trolley body 100 can be realized. And when the detection trolley body 100 cannot pass through the gap of the substation equipment due to its too large width, the roller steering mechanism can be used to make the advancing direction of the detection trolley body 100 parallel to the width direction of the detection trolley body 100, thereby further improving the applicability of the partial discharge rapid detection device for substations.

[0035] Combined with Figure 2 、 Figure 4 、 Figure 5As shown in the figure, the detection trolley body 100 is provided with two oppositely arranged rotating rods 230. A strip-shaped through hole 240 is provided on the side wall of the detection trolley body 100 and near the rotating rod 230. The end of the L-shaped plate 110 passes through the strip-shaped through hole 240 and is connected to the rotating rod 230. The detection trolley body 100 is also provided with a rotating rod driving mechanism for driving the rotating rod 230 to rotate so as to make the L-shaped plate 110 rotate. A first gear ring 250 is provided on the outer side wall of the rotating rod 230. The rotating rod driving mechanism includes a driving rod 260 rotatably arranged in the detection trolley body 100. A second gear ring 270 meshing with the first gear ring 250 is provided on the driving rod 260. The rotating rod driving mechanism further includes a third reduction gearbox 410 arranged in the detection trolley body 100. The output shaft of the third reduction gearbox 410 is connected to the driving rod 260, and the output shaft of the third reduction gearbox 410 is connected with a third motor 420.

[0036] When it is necessary to detect the equipment at a high place in the substation, first move the end where the inclined surface 130 of the detection trolley body 100 is located to the bottom column of the equipment. Then, by driving the electric push rod 220, the height of the end of the detection trolley body 100 away from the inclined surface 130 is lowered. Then, by driving the rubber rollers 120, the detection trolley body 100 is inclined at the base, so that the piston rod of the electric push rod 220 in front of the detection trolley body 100 is placed on the bottom column. Then, drive the piston rod of the electric push rod 220 in front of the detection trolley body 100 to extend, so that the rubber rollers 120 at the electric push rod 220 are pressed against the bottom column, thereby realizing the clamping of the bottom column. Then, drive the rubber rollers 120 clamped at the bottom column to make the piston rod of the electric push rod 220 behind the detection trolley body 100 climb up the bottom column. Then, drive the electric push rod 220 behind the detection trolley body 100 to extend, so that the rubber rollers 120 at the electric push rod 220 are pressed against the bottom column, so that the detection trolley body 100 completely clamps the bottom column. Then, drive the rubber rollers 120 to roll to control the detection trolley body 100 to climb at the bottom column, so as to be able to detect the equipment at a high place in the substation more accurately.

[0037] In this embodiment, through the rotatable setting of the L-shaped plate 110, the detection trolley body 100 can climb at the bottom column of the substation equipment, thus not only avoiding the danger of maintenance personnel climbing the substation equipment, but also preferably improving the detection accuracy of the partial discharge rapid detection device for the substation.

[0038] Furthermore, two partition plates 280 are provided in the detection trolley body 100. The two partition plates 280 divide the interior of the detection trolley body 100 into an equipment installation cavity 210 and rotating rod installation cavities 290 located on both sides of the equipment installation cavity 210. The rotating rod 230 is arranged in the rotating rod installation cavity 290.

[0039] In this embodiment, through the arrangement of the partition plate 280, the device installation cavity 210 can be separated from the rotating rod installation cavity 290, thereby preferably protecting the ultrasonic partial discharge detector in the device installation cavity 210.

[0040] Embodiment 2:

[0041] The parts not mentioned in this embodiment are the same as those in Embodiment 1.

[0042] Combined with Figure 6 As shown, the partial discharge rapid detection device for a substation in this embodiment is also provided with a control system. The control system includes a PLC controller, a communication module, and a mobile terminal. The ultrasonic partial discharge detector is used to send the detected data to the PLC controller, and the PLC controller is used to process the data and send the processed data to the mobile terminal through the communication module. The control system also includes a signal transmitter and a signal receiving module. The signal transmitter is used to send a control signal to the PLC controller to control the electric push rod 220, the first motor 330, the second motor 3100, and the third motor 420. The signal receiving module is connected to the PLC controller and receives the signal sent by the signal transmitter. The control system also includes a power supply module, and the power supply module is used to supply power to the ultrasonic partial discharge detector, the PLC controller, the communication module, the signal receiving module, the electric push rod 220, the first motor 330, the second motor 3100, and the third motor 420.

[0043] Through the arrangement of the control system, the electric push rod 220, the first motor 330, the second motor 3100, and the third motor 420 can be preferably controlled, thereby facilitating the maintenance personnel to control the detection trolley body 100.

[0044] In summary, the above are only the preferred embodiments of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

[0045] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0046] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A substation partial discharge rapid detection device, characterized in that: The invention comprises a detection trolley body (100), wherein a side wall of the detection trolley body (100) along the length direction thereof is provided with an inclined surface (130), a device installation cavity (210) is provided in the detection trolley body (100), an ultrasonic partial discharge detector is provided in the device installation cavity (210), and an L-shaped plate (110) is provided on both sides of the detection trolley body (100) along the width direction thereof, the L-shaped plate (110) comprises a connecting portion (111) arranged parallel to the side wall of the detection trolley body (100), and the upper end of the connecting portion (111) is vertically provided A mounting portion (112) is provided, and two groups of electric push rods (220) are arranged at the mounting portion (112). The two groups of electric push rods (220) are arranged at intervals along the length direction of the side wall of the detection trolley body (100). The electric push rods (220) include a retractable piston rod. The piston rod of the electric push rod (220) extends downward and protrudes out of the mounting portion (112). The end of the piston rod protruding from the mounting portion (112) is connected to a rubber roller (120). The rubber roller (120) is provided with a roller driving mechanism for driving the rubber roller (120) to rotate.

2. A substation partial discharge rapid detection device according to claim 1, characterized in that: A roller mounting frame (310) for mounting a rubber roller (120) is connected to the piston rod of the electric push rod (220).

3. A substation partial discharge rapid detection device according to claim 1 or 2, characterized in that: The roller drive mechanism comprises a first reduction box (320) arranged at the roller mounting frame (310), the output shaft of the first reduction box (320) being connected to the rotating shaft of the rubber roller (120), and the input shaft of the first reduction box (320) being connected to the first motor (330).

4. A substation partial discharge rapid detection device according to claim 3, characterized in that: A roller steering mechanism for driving the roller mounting frame (310) to rotate is provided between the piston rod of the electric push rod (220) and the roller mounting frame (310); a mounting plate (340) is provided at the end of the piston rod, a mounting bracket (350) is provided at the mounting plate (340), a connecting rod (360) is rotatably provided at the mounting bracket (350), and the lower end of the connecting rod (360) extends out of the mounting bracket (350) and is connected to the roller mounting frame (310).

5. A substation partial discharge rapid detection device according to claim 4, characterized in that: The roller steering mechanism comprises a first bevel gear (370) arranged at a connecting rod (360); a second reduction box (380) is arranged at a side wall of the mounting bracket (350); an output shaft of the second reduction box (380) extends into the mounting bracket (350); a second bevel gear (390) meshing with the first bevel gear (370) is arranged at the end of the output shaft of the second reduction box (380) extending into the mounting bracket (350); and a second motor (3100) is connected to the input shaft of the second reduction box (380).

6. A substation partial discharge rapid detection device according to claim 1, characterized in that: Two rotating rods (230) arranged opposite to each other are provided in the detection trolley body (100); a strip-shaped through hole (240) is provided on the side wall of the detection trolley body (100) near the rotating rod (230); the end of the L-shaped plate (110) passes through the strip-shaped through hole (240) and is connected to the rotating rod (230); and a rotating rod driving mechanism for driving the rotating rod (230) to rotate so as to rotate the L-shaped plate (110) is also provided at the detection trolley body (100).

7. A substation partial discharge rapid detection device according to claim 6, characterized in that: A first gear ring (250) is provided on the outer side wall of the rotating rod (230); the rotating rod driving mechanism comprises a driving rod (260) rotatably arranged in the detection trolley body (100); a second gear ring (270) meshing with the first gear ring (250) is provided on the driving rod (260); the rotating rod driving mechanism also comprises a third reduction box (410) arranged in the detection trolley body (100); an output shaft of the third reduction box (410) is connected to the driving rod (260), and the output shaft of the third reduction box (410) is connected to a third motor (420).

8. A substation partial discharge rapid detection device according to claim 7, characterized in that: The rotating rod (230) is fixedly connected to the first gear ring (250).

9. A substation partial discharge rapid detection device according to claim 6, characterized in that: Two partitions (280) are provided in the detection vehicle body (100), and the two partitions (280) divide the interior of the detection vehicle body (100) into a device installation cavity (210) and a rotating rod installation cavity (290) located on both sides of the device installation cavity (210).

10. A substation partial discharge rapid detection device according to claim 8 or 9, characterized in that: The rotating rod (230) is disposed in the rotating rod installation cavity (290).

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