CN111064102A - Automatic bird repellent device of transformer substation - Google Patents
Automatic bird repellent device of transformer substation Download PDFInfo
- Publication number
- CN111064102A CN111064102A CN202010049281.5A CN202010049281A CN111064102A CN 111064102 A CN111064102 A CN 111064102A CN 202010049281 A CN202010049281 A CN 202010049281A CN 111064102 A CN111064102 A CN 111064102A
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- Prior art keywords
- rotating
- shaft
- gear
- transformer substation
- power
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/06—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/06—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like
- A01M29/10—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like using light sources, e.g. lasers or flashing lights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Birds (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses an automatic bird repelling device for a transformer substation, which comprises main bodies which are bilaterally symmetrical, wherein the main bodies are internally provided with advancing devices, the advancing devices comprise annular rotatable advancing wheels which are symmetrical front and back, the advancing devices can control the vertical arrangement or the horizontal arrangement of the advancing wheels, when the advancing wheels are vertically arranged, the advancing wheels can rotate to drive the main bodies to advance, when the advancing wheels are horizontally arranged, the advancing wheels can rotate to drive the main bodies to fly in the air, the invention enables a laser transmitter to emit laser at multiple angles through the rotating devices to be used for repelling birds, is simple, convenient and efficient, drives the main bodies to move and patrol in the transformer substation through the advancing wheels in the advancing devices, can control the main bodies to patrol and repel the birds on the ground and in the air in all directions through the change of the arrangement states of the advancing wheels, enlarges the working range, improves the working efficiency and reduces the labor cost, and the cleaning device can clean sundries or bird nests attached to the ground or the elevated frame, so that the power supply safety of the transformer substation is improved.
Description
Technical Field
The invention relates to the technical field of transformer substations, in particular to an automatic bird repelling device for a transformer substation.
Background
The transformer substation is a place for converting voltage and current in an electric power system, receiving electric energy and distributing electric energy, activities such as foraging, nesting and resting of birds can be in contact with electric equipment due to natural habits of the birds, and ground faults are caused, so that lines are tripped, and bird groups near the transformer substation need to be repelled. The present invention sets forth a device that solves the above problems.
Disclosure of Invention
The technical problem is as follows:
the existing laser driver is fixed in position and cannot move, and the range of bird repelling of the emitted laser is limited.
In order to solve the problems, the embodiment designs an automatic bird repelling device for a transformer substation, which comprises a main body which is symmetrical left and right, wherein the main body is internally provided with a travelling device, the travelling device comprises annular rotatable travelling wheels which are symmetrical front and back, the travelling device can control the vertical arrangement or the horizontal arrangement of the travelling wheels, when the travelling wheels are vertically arranged, the travelling wheels can rotate to drive the main body to travel, when the travelling wheels are horizontally arranged, the travelling wheels can rotate to drive the main body to fly in the air, a cleaning device is arranged in the main body on the left side, the cleaning device comprises a suction pipe, sundries between power stations are cleaned through the suction pipe, an installation block is fixedly arranged between the left main body and the right main body, a lifting device is arranged in the installation block, and the lifting device comprises a lifting ball screw, the upper end of the ball screw is fixedly provided with a fixed disc which is arranged between the left main body and the right main body in a sliding way, the upper end surface of the fixed disc is fixedly provided with a toothed ring, a driving motor is fixedly arranged at the center of the gear ring, a driving shaft is dynamically arranged at the upper end of the driving motor, a rotating disc is fixedly arranged on the driving shaft, a rotating device is arranged on the rotating disc and comprises an engaging gear and a rotating ball, the engaging gear is engaged with the gear ring, the meshing gear can adjust the rotating ball to rotate when rotating, the rotating ball is provided with four laser transmitters in an annular array, the laser transmitter is provided with a monitoring module and emits laser to drive birds, therefore, the rotation of the rotating disc and the rotation of the meshing gear enable the laser emitted in the direction of the laser emitter to drive birds and carry out fixed-point impurity removal through the monitoring of the laser emitter.
Preferably, a fixing rod is fixedly arranged in the travelling wheel, a rotating shaft is fixedly arranged on the fixing rod, a mounting disc is fixedly arranged at one end, far away from the mounting block, of the rotating shaft, and three blades are uniformly arranged on the mounting disc.
Preferably, a solar panel is installed on the outer surface of the rotating ball, and converts solar energy into electric energy to provide electric energy for the laser transmitter to work.
Wherein, the advancing device comprises a front and back symmetrical conversion cavity, one side of the conversion cavity far away from the installation block is communicated with the outside, one side of the conversion cavity near the installation block is communicated with a rotation groove, a sliding block is arranged in the rotation groove in a sliding manner, a rotation motor in power connection with one end of the rotation shaft far away from the installation disc is fixedly arranged on the sliding block, one side of the front and back rotation grooves far away from each other is communicated with a sliding groove, a threaded shaft is rotatably arranged between the sliding groove and the rotation groove, the threads of the front and back threaded shafts are opposite, the threaded shaft is in threaded connection with the sliding block, the rear end of the threaded shaft extends to the outside and is fixedly provided with a fixed block, the front and back threaded shafts on the left side are fixedly connected, the front and back threaded shafts on the right side are in power connection with a conversion motor, and a connection groove is continuously, the rear side the threaded shaft runs through the connecting groove and is in power connection with the connecting groove through a synchronous belt.
The cleaning device comprises a storage cavity with an upward opening, the upper side of the storage cavity is rotatably installed with the closed sealing plate through a closed rotating shaft, the rear end of the upper side of the storage cavity is fixedly provided with a magnetic block magnetically attracted by the closed sealing plate, the rear end of the suction pipe is communicated with the storage cavity, and the suction pipe is internally provided with an air pump.
The lifting device comprises a power cavity, a rotating gear is arranged in the power cavity in a rotating mode and is in threaded connection with the ball screw, the right side of the rotating gear is connected with a power gear in a meshed mode, a power shaft is fixedly arranged at the center of the power gear, and a power motor is connected to the lower end of the power shaft in a power connection mode.
Wherein, rotating device includes the rolling disc internal rotation is equipped with the gear pivot, the meshing gear set firmly in the gear pivot, the rolling disc up end has set firmly bilateral symmetry's installation pole, the installation pole internal rotation is equipped with the rotation axis, rolling ball fixed mounting in between the rotation axis, be equipped with the race in the left installation pole, it is left the rotation axis with the gear pivot runs through the race, just the rotation axis with connect through driving belt power between the gear pivot.
The invention has the beneficial effects that: the invention can ensure that the laser emitter can emit laser at multiple angles for driving birds through the rotating device, is simple, convenient and efficient, drives the main body to move and patrol in the transformer substation through the travelling wheel in the travelling device, can control the main body to patrol and drive the birds all around on the ground and in the air through the change of the setting state of the travelling wheel, enlarges the working range, improves the working efficiency, reduces the labor cost, and can clear sundries or bird nests attached to the ground or an overhead by the cleaning device, thereby improving the safety of power supply of the transformer substation.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic overall structure diagram of an automatic bird repelling device of a transformer substation according to the invention;
FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;
FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 2;
FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 2;
FIG. 5 is a schematic view of the structure in the direction "D-D" of FIG. 2;
FIG. 6 is a schematic view of the structure in the direction "E-E" of FIG. 5;
FIG. 7 is a schematic view of the structure in the direction "F-F" of FIG. 1.
Detailed Description
The invention will now be described in detail with reference to fig. 1-7, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to an automatic bird repelling device for a transformer substation, which is mainly used for bird repelling work of the transformer substation, and the invention is further explained by combining the attached drawings of the invention:
the invention relates to an automatic bird repellent device for a transformer substation, which comprises a left-right symmetrical main body 20, wherein the main body 20 is internally provided with a traveling device 90, the traveling device 90 comprises a front-back symmetrical annular rotatable traveling wheel 28, the traveling device 90 can control the vertical arrangement or horizontal arrangement of the traveling wheel 28, when the traveling wheel 28 is vertically arranged, the traveling wheel can rotate to drive the main body 20 to travel, when the traveling wheel 28 is horizontally arranged, the traveling wheel 28 rotates to drive the main body 20 to fly in the air, a cleaning device 89 is arranged in the main body 20 on the left side, the cleaning device 89 comprises a suction pipe 22, sundries between power stations are cleaned through the suction pipe 22, a mounting block 43 is fixedly arranged between the left main body 20 and the right main body 20, a lifting device 88 is arranged in the mounting block 43, and the lifting device 88 comprises a lifting ball screw 48, ball 48 upper end sets firmly the slip and sets up in controlling fixed disk 60 between main part 20, fixed disk 60 up end sets firmly toothed ring 61, toothed ring 61 center department sets firmly driving motor 62, driving motor 62 upper end power mounting has drive shaft 63, set firmly rolling disc 64 on the drive shaft 63, be equipped with rotating device 87 on the rolling disc 64, rotating device 87 includes meshing gear 65 and rolling ball 71, meshing gear 65 with toothed ring 61 meshes, then meshing gear 65 is adjustable when rotating rolling ball 71 rotates, install four laser emitter 72 of annular array on the rolling ball 71, laser emitter 72 has monitoring module, just laser emitter 72 sends laser can drive bird, thereby the rotation of rolling disc 64 with meshing gear 65's rotation makes the transmission laser in laser emitter 72 position drives bird and passes through laser emitter 72 control carries out fixed point and clears up clearly And removing impurities.
Advantageously, a fixed rod 29 is fixed in the travelling wheel 28, a rotating shaft 32 is fixed on the fixed rod 29, a mounting plate 30 is fixed on one end of the rotating shaft 32 far away from the mounting block 43, and three blades 31 are uniformly arranged on the mounting plate 30.
Advantageously, a solar panel 73 is mounted on the outer surface of the rotating ball 71, and the solar panel 73 converts solar energy into electric energy to supply electric energy for the operation of the laser transmitter 72.
According to the embodiment, the following detailed description is provided for the traveling device 90, where the traveling device 90 includes a front-back symmetrical conversion cavity 27, one side of the conversion cavity 27 far from the installation block 43 communicates with the outside, one side of the conversion cavity 27 near the installation block 43 communicates with a rotation groove 34, a sliding block 35 is slidably disposed in the rotation groove 34, a rotation motor 33 is fixedly disposed on the sliding block 35 and is in power connection with one end of the rotation shaft 32 far from the installation disc 30, one side of the front-back rotation groove 34 far from the rotation groove is communicated with a sliding groove 36, a threaded shaft 37 is rotatably disposed between the sliding groove 36 and the rotation groove 34, the front-back threaded shaft 37 has opposite threads, the sliding block 37 is in threaded connection with the threaded shaft 35, the rear end of the threaded shaft 37 extends to the outside and is fixedly disposed with a fixed block 39, and the front-back threaded shaft 37 on the left side is fixedly connected with the, two front and back on right side threaded shaft 37 between the power connection have conversion motor 42, about the main part 20 with even be equipped with the spread groove 40 between the installation piece 43, the rear side threaded shaft 37 runs through spread groove 40 and between the two through synchronous belt 41 power connection.
According to the embodiment, the following detailed description is provided for the cleaning device 89, the cleaning device 89 includes a storage cavity 21 with an upward opening, a sealing plate 25 for sealing the storage cavity 21 is rotatably installed on the upper side of the storage cavity 21 through a sealing rotating shaft 24, a magnetic block 26 magnetically attracted to the sealing plate 25 is fixedly installed at the rear end of the upper side of the storage cavity 21, the rear end of the suction pipe 22 is communicated with the storage cavity 21, and an air pump 23 is installed in the suction pipe 22.
According to an embodiment, the lifting device 88 is described in detail below, the lifting device 88 includes a power cavity 44, a rotating gear 49 is rotatably disposed in the power cavity 44, the rotating gear 49 is in threaded connection with the ball screw 48, a power gear 47 is engaged and connected to the right side of the rotating gear 49, a power shaft 45 is fixedly disposed at the center of the power gear 47, and a power motor 46 is dynamically connected to the lower end of the power shaft 45.
According to the embodiment, the following detailed description of the rotating device 87 is provided, the rotating device 87 includes a gear rotating shaft 66 arranged in the rotating disc 64, the meshing gear 65 is fixedly arranged on the gear rotating shaft 66, bilaterally symmetrical mounting rods 67 are fixedly arranged on the upper end face of the rotating disc 64, rotating shafts 70 are arranged in the mounting rods 67, the rotating balls 71 are fixedly arranged between the rotating shafts 70, belt grooves 68 are arranged in the mounting rods 67 on the left side, the rotating shafts 70 on the left side and the gear rotating shaft 66 penetrate through the belt grooves 68, and the rotating shafts 70 and the gear rotating shaft 66 are in power connection through a transmission belt 69.
The following describes in detail the use steps of an automatic bird repelling device for a substation with reference to fig. 1 to 7:
initially, the traveling wheel 28 is vertically disposed, the lower end of the traveling wheel 28 is in contact with the ground, and the sliding block 35 is located in the rotating groove 34.
When the bird repelling device is used, the rotating motor 33 is started to drive the traveling wheel 28 to rotate, the main body 20 travels on the ground of a transformer substation to patrol, the laser emitter 72 supplies power to work to emit laser to repel a bird group, the driving motor 62 is started to drive the rotating disc 64 to rotate through the driving shaft 63, the mounting rod 67 drives the rotating ball 71 to horizontally rotate to adjust the rotating angle of the laser emitter 72 in the horizontal direction, the meshing gear 65 can rotate under the action of the toothed ring 61 when the rotating disc 64 rotates, the rotating shaft 70 rotates through the driving belt 69, the rotating ball 71 drives the laser emitter 72 to vertically rotate, the angle of the laser emitter 72 in the vertical direction is adjusted, and the laser emitter 72 can emit laser in all directions to repel the bird group through the work of the rotating disc 64;
if the bird is repelled in the area where the distance between the laser beams above the transformer substation cannot meet the requirement, the power motor 46 is started, the power gear 47 drives the rotating gear 49 to rotate, the ball screw 48 drives the fixed disc 60 to descend, the rotating disc 64 and the rotating ball 71 descend, the overall size of the main body 20 is reduced, the aerial shuttle patrol is facilitated, the conversion motor 42 is started, the threaded shaft 37 is driven to synchronously rotate through the synchronous belt 41, the slide block 35 on the left side rotates clockwise the slide block 35 on the right side ninety degrees anticlockwise, the traveling wheel 28 is in a horizontal state, the slide block 35 moves towards one side close to the slide groove 36 along with the continuous rotation of the threaded shaft 37, the traveling wheel 28 is driven to move towards the communication cavity 38, the blade 31 is located outside, the conversion motor 42 stops, the rotation motor 33 is started, the blade 31 is driven to rotate, and wind power from bottom to top, the main body 20 is lifted upwards, so that the main body 20 flies in the air, and the bird repelling range is expanded;
the laser emitter 72 can monitor the substation during operation, if there are debris or bird's nest on ground or the transformer substation overhead, can start the air pump 23, absorb the debris to depositing in the chamber 21 through the suction tube 22 and collect, and then rotate the closure plate 25 and open and deposit the chamber 21 and clear away.
The invention has the beneficial effects that: the invention can ensure that the laser emitter can emit laser at multiple angles for driving birds through the rotating device, is simple, convenient and efficient, drives the main body to move and patrol in the transformer substation through the travelling wheel in the travelling device, can control the main body to patrol and drive the birds all around on the ground and in the air through the change of the setting state of the travelling wheel, enlarges the working range, improves the working efficiency, reduces the labor cost, and can clear sundries or bird nests attached to the ground or an overhead by the cleaning device, thereby improving the safety of power supply of the transformer substation.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (7)
1. The utility model provides an automatic bird repellent device of transformer substation, includes bilateral symmetry's main part, its characterized in that: advancing devices are arranged in the main body;
the traveling device comprises annular rotatable traveling wheels which are symmetrical front and back, the traveling device can control the vertical arrangement or the horizontal arrangement of the traveling wheels, when the traveling wheels are vertically arranged, the traveling wheels rotate to drive the main body to travel, and when the traveling wheels are horizontally arranged, the traveling wheels rotate to drive the main body to fly in the air;
a cleaning device is arranged in the left main body and comprises a suction tube, sundries between the power stations are cleaned through the suction tube, an installation block is fixedly arranged between the left main body and the right main body, a lifting device is arranged in the installation block and comprises a lifting ball screw, a fixed disc which is slidably arranged between the left main body and the right main body is fixedly arranged at the upper end of the ball screw, a toothed ring is fixedly arranged on the upper end face of the fixed disc, a driving motor is fixedly arranged at the center of the toothed ring, a driving shaft is dynamically arranged at the upper end of the driving motor, and a rotating disc is fixedly arranged on the driving shaft;
be equipped with rotating device on the rolling disc, rotating device includes meshing gear and rolling ball, meshing gear with the ring gear meshing, then it is adjustable when meshing gear rotates the rolling ball rotates, install four laser emitter of annular array on the rolling ball, laser emitter has monitoring module, just laser emitter sends laser and can drive bird, thereby the rotation of rolling disc with meshing gear's rotation makes the transmission laser in laser emitter position drives the bird and passes through the debris are clear away in the laser emitter control fixed point.
2. The automatic bird repelling device of the transformer substation of claim 1, wherein: the fixed rod is fixedly arranged in the traveling wheel, a rotating shaft is fixedly arranged on the fixed rod, an installation disc is fixedly arranged at one end, far away from the installation block, of the rotating shaft, and three blades are uniformly arranged on the installation disc.
3. The automatic bird repelling device of the transformer substation of claim 1, wherein: and the solar panel is arranged on the outer surface of the rotating ball and converts solar energy into electric energy to provide electric energy for the laser transmitter to work.
4. The automatic bird repelling device of the transformer substation of claim 1, wherein: the traveling device comprises a front-back symmetrical conversion cavity;
one side, far away from the mounting block, of the conversion cavity is communicated with the outside, one side, close to the mounting block, of the conversion cavity is communicated with a rotating groove, a sliding block is arranged in the rotating groove in a sliding mode, a rotating motor in power connection with one end, far away from the mounting disc, of the rotating shaft is fixedly arranged on the sliding block, one sides, far away from each other, of the front rotating groove and the rear rotating groove are communicated with a sliding groove, a threaded shaft is rotatably arranged between the sliding groove and the rotating groove, threads of the front threaded shaft and the rear threaded shaft are opposite, the threaded shaft is in threaded connection with the sliding block, the rear end of the threaded shaft extends to the outside and is fixedly provided with a fixing block, the front threaded shaft and the rear threaded shaft on the left side are;
the left and right main body with even be equipped with the spread groove between the installation piece, the rear side the threaded spindle runs through spread groove and through synchronous belt power connection between the two.
5. The automatic bird repelling device of the transformer substation of claim 1, wherein: the cleaning device comprises a storage cavity with an upward opening;
deposit the chamber upside and rotate through sealed pivot install with deposit chamber confined closing plate, deposit chamber upside rear end set firmly with the magnetic path that the closing plate magnetism was inhaled, the suction tube rear end with deposit the chamber and communicate with each other, just install the air pump in the suction tube.
6. The automatic bird repelling device of the transformer substation of claim 1, wherein: the lifting device comprises a power cavity;
the rotary gear is arranged in the power cavity in a rotating mode and is in threaded connection with the ball screw, the power gear is connected to the right side of the rotary gear in a meshed mode, a power shaft is fixedly arranged at the center of the power gear, and a power motor is connected to the lower end of the power shaft in a power connection mode.
7. The automatic bird repelling device of the transformer substation of claim 1, wherein: the rotating device comprises a gear rotating shaft which is rotatably arranged in the rotating disc;
the meshing gear set firmly in the gear shaft, the rolling disc up end has set firmly bilateral symmetry's installation pole, the installation pole internal rotation is equipped with the rotation axis, ball fixed mounting in between the rotation axis, be equipped with the race in the left installation pole, it is left the rotation axis with the gear shaft runs through the race, just the rotation axis with connect through driving belt power between the gear shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010049281.5A CN111064102A (en) | 2020-01-16 | 2020-01-16 | Automatic bird repellent device of transformer substation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010049281.5A CN111064102A (en) | 2020-01-16 | 2020-01-16 | Automatic bird repellent device of transformer substation |
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Publication Number | Publication Date |
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CN111064102A true CN111064102A (en) | 2020-04-24 |
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Application Number | Title | Priority Date | Filing Date |
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CN202010049281.5A Withdrawn CN111064102A (en) | 2020-01-16 | 2020-01-16 | Automatic bird repellent device of transformer substation |
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CN (1) | CN111064102A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113575565A (en) * | 2021-07-27 | 2021-11-02 | 重庆南电科技有限公司 | Bird trouble hidden danger intelligent monitoring expulsion device is waded to electric power facility |
-
2020
- 2020-01-16 CN CN202010049281.5A patent/CN111064102A/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113575565A (en) * | 2021-07-27 | 2021-11-02 | 重庆南电科技有限公司 | Bird trouble hidden danger intelligent monitoring expulsion device is waded to electric power facility |
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Application publication date: 20200424 |