CN214257271U - A felling device for felling invade transmission of electricity passageway branch - Google Patents

A felling device for felling invade transmission of electricity passageway branch Download PDF

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Publication number
CN214257271U
CN214257271U CN202120308329.XU CN202120308329U CN214257271U CN 214257271 U CN214257271 U CN 214257271U CN 202120308329 U CN202120308329 U CN 202120308329U CN 214257271 U CN214257271 U CN 214257271U
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CN
China
Prior art keywords
saw
transmission
cutting
guide plates
chain
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Expired - Fee Related
Application number
CN202120308329.XU
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Chinese (zh)
Inventor
辛博文
孙博轩
赵丽娜
付宏春
逯鹏
李宝泉
常伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Heilongjiang Baoquanling Electric Power Bureau Co ltd
State Grid Corp of China SGCC
Original Assignee
State Grid Heilongjiang Baoquanling Electric Power Bureau Co ltd
State Grid Corp of China SGCC
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Application filed by State Grid Heilongjiang Baoquanling Electric Power Bureau Co ltd, State Grid Corp of China SGCC filed Critical State Grid Heilongjiang Baoquanling Electric Power Bureau Co ltd
Priority to CN202120308329.XU priority Critical patent/CN214257271U/en
Application granted granted Critical
Publication of CN214257271U publication Critical patent/CN214257271U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A cutting device for cutting branches intruding into a power transmission channel relates to a cutting device. The utility model discloses a solve current transmission of electricity passageway branch and fell there is the problem that inefficiency, fell the security poor and the ageing is not good. The utility model discloses a connect through the hoist cable between helicopter and the hanging saw, two gasoline engines and gasoline tank are installed in the saw case, gasoline tank is connected with two gasoline engines, the vertical lower extreme of installing at the saw case of saw arm, the pedestal mounting is at the lower extreme of saw arm, install a sprocket on every guide board, a plurality of guide boards fall into four cutting units, a plurality of guide boards of every cutting unit are arranged from top to bottom in proper order, four cutting units are installed around the saw arm with the mode of rectangle array, the sprocket on two adjacent guide boards in every cutting unit is opposite in transmission direction under drive assembly's drive. The utility model is used for felling and invading transmission of electricity passageway branch.

Description

A felling device for felling invade transmission of electricity passageway branch
Technical Field
The utility model relates to a felling device, concretely relates to felling device for felling invasion transmission of electricity passageway branch.
Background
In daily life, green vegetation has played a very important role in beautifying the environment, absorbing environmental pollution, providing a home for wild animals, and the like. However, the green vegetation around the transmission line has significant potential danger for public safety. The collapse of trees around the power transmission line may hit the power transmission line to cause power failure and forest fire, the trees under the power transmission line grow too high, or the growth of trees near the power transmission line channel invades the power transmission channel, causing serious potential safety hazard. Therefore, management and felling of green vegetation around power transmission lines is a very important issue. At present, the pruning of trees around the transmission line and the control of green vegetation have consumed the huge financial resources of electric power company, and these green vegetation of reasonable, high-efficient management can not only reduce whole spending, can ensure to last the power supply moreover, prevent that the transmission line from being damaged the reduction of the power transmission reliability that arouses, causing serious economic loss.
The urban green vegetation management and monitoring are relatively easy, and the management and cutting are very difficult in non-urban areas, particularly in mountain and forest zones due to long polling period, vigorous tree growth, long related distance and the like. At present, the most important mode is to fell the super high trees manually, so that the risk that the super high trees invade a power transmission channel is prevented. However, the manual felling method has various problems, namely, the manual felling efficiency is low, and manual operation of operators is needed; secondly, the manual felling risk is high, and sometimes, people need to climb trees for operation, so that the operation risk is high; thirdly, the timeliness is poor, the condition that trees grow and invade a power transmission channel needs to be discovered through line patrol, and then workers are arranged to carry various tools to cut down on site.
In conclusion, the problem that the efficiency is low, the cutting safety is poor and the timeliness is not good exists in the existing branch cutting of the power transmission channel.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the current transmission channel branch felling has inefficiency, the poor and not good ageing of felling security. Further, a cutting device for cutting branches intruding into a power transmission channel is provided.
The technical scheme of the utility model is that: a felling device for felling branches invading a power transmission channel comprises a helicopter, a sling and a hanging saw, wherein the helicopter is connected with the hanging saw through the sling, the hanging saw comprises a saw box, two gasoline engines, a gasoline tank, a saw arm, a base, a transmission assembly, a plurality of guide plates and a plurality of chain teeth, the two gasoline engines and the gasoline tank are arranged in the saw box, the gasoline tank is connected with the two gasoline engines, the saw arm is vertically arranged at the lower end of the saw box, the base is arranged at the lower end of the saw arm, each guide plate is provided with one chain tooth, the chain teeth on each guide plate are transmitted around the outer contour of the guide plate, the guide plates are divided into four cutting units, the guide plates of each cutting unit are sequentially arranged from top to bottom, an interval L is reserved between every two adjacent guide plates, the four cutting units are arranged around the saw arm in a rectangular array mode, and the four cutting units are connected through the transmission assembly arranged in the saw box and the saw arm, the power of the transmission assembly is provided by two gasoline engines, and the transmission directions of the chain teeth on the two adjacent guide plates in each cutting unit are opposite under the driving of the transmission assembly.
Further, the guide plate is a right-angled triangle guide plate.
Further, the transmission assembly comprises a first transmission unit and a second transmission unit, the first transmission unit comprises a first driven sprocket shaft, two first chains, a plurality of first sprocket shafts, two first driving sprockets and two first driven sprockets, the two gasoline engines are arranged oppositely, a first driving sprocket is sleeved on an output shaft of each gasoline engine, the first driven sprocket shaft is rotatably installed at the lower part of the saw arm, the two first driven sprockets are installed on the first driven sprocket shaft, the two first driving sprockets and the two first driven sprockets are connected through one first chain, the plurality of first sprocket shafts 12 are installed on guide plates of the two cutting units which are oppositely arranged, the plurality of first sprocket shafts are installed on odd-numbered guide plates or even-numbered guide plates which are counted from top to bottom, the first sprocket shafts on the guide plates of the two cutting units which are oppositely arranged are respectively engaged with tight edges and loose edges of the same first chain to realize that the guide plates are rotated in different directions Rotation of (2); the second transmission unit comprises two second connecting shafts, two second transmission chain wheels, two worm wheels, two worms, a plurality of second driving chain wheels, a plurality of second chains and a plurality of second chain wheel shafts, the two second connecting shafts are respectively and rotatably arranged on the saw arm, each second connecting shaft is provided with one second transmission chain wheel, the second transmission chain wheel is meshed with one chain of the two first chains, the transmission directions of the two second transmission chain wheels when meshed with the two first chains are opposite, each second connecting shaft is provided with one worm wheel, each worm wheel is meshed with one worm wheel, each second driving chain wheel is sleeved on each second shaft, the second chain wheel shafts are rotatably arranged on the guide plates of the two cutting units which are oppositely arranged, and the second chain wheel shafts are arranged on the odd number guide plates or the even number guide plates which are arranged from top to bottom, each second chain wheel shaft on the guide plates of the two cutting units which are oppositely arranged is connected with one second driving chain wheel through a second chain, and the chain teeth on the odd number guide plates or the even number guide plates are driven to rotate in different rotation directions.
Further, the helicopter also comprises a lifting mechanism, wherein the lifting mechanism comprises two rollers, a lifting ring and two driving motors, the helicopter and the saw box are respectively internally provided with one roller and one driving motor, an output shaft of the driving motor is connected with the rollers, two ends of a sling are respectively wound on one roller, and the lifting ring is arranged at the upper end of the saw box.
Further, the number of guide plates per cutting unit is 4, 6 or 8.
Further, a distance L of 6-10cm is reserved between every two adjacent guide plates.
Compared with the prior art, the utility model has the following effect:
1. the utility model discloses can directly cut the branch of invading the transmission of electricity passageway when the helicopter is patrolled and examined, and need not cut down trees from the root, very big promotion work efficiency, also effectual economic loss who reduces trees, the ageing is good.
2. The utility model discloses a hoist cable 2 and elevating system, the height of saw is hung in control that can be nimble, can be convenient cut down the branch, can guarantee on the one hand that the helicopter is in safe height all the time, and on the other hand does not need too many guide plate and sawtooth just can accomplish the cutting to various high trees, the whole weight of the hanging saw that reduces.
3. The utility model discloses an oil circuit switch is through the control of the bluetooth receiving arrangement among the control module 25, and on the one hand direct contact equipment has protected operating personnel's security, and on the other hand also can close even the helicopter flight in the equipment during operation and hang the saw.
4. The utility model creatively designs four rows with four rows in each row in consideration of the characteristics of the tree branches such as size, toughness and elasticity; each row of guide plates is directly provided with a 90-degree angle plate. The chain teeth exist in any direction of the hanging saw in the flying process of the airplane, and branches can be cut conveniently.
5. The utility model considers the characteristics of the tree branch such as size, toughness, elasticity, etc., and specially considers the motion direction of the sprocket combination and the appearance form of the guide plate. The tree branches can easily enter the cutting range of the chain teeth, the hanging saw cannot move in the vertical direction, and safety of the helicopter is protected.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention. Fig. 2 is a schematic structural view of the hanging saw 3. Fig. 3 is a schematic view of the main angle drive of fig. 2. Fig. 4 is a rear view angle drive schematic of fig. 2. Fig. 5 is a schematic view of the transmission of fig. 2 at a left angle. Fig. 6 is a schematic drive diagram of fig. 2 at a right angle of view. Fig. 7 is a schematic top view of fig. 2.
Detailed Description
The first embodiment is as follows: the present embodiment will be described with reference to fig. 1 to 7, and the cutting device for cutting branches intruding into a power transmission channel of the present embodiment includes a helicopter 1, and is characterized in that: the helicopter comprises a helicopter 1 and a hanging saw 3, wherein the helicopter 1 is connected with the hanging saw 3 through a sling 2, the hanging saw 3 comprises a saw box 4, two gasoline engines 5, a gasoline tank 6, a saw arm 7, a base 8, a transmission component, a plurality of guide plates 9 and a plurality of chain teeth 10, the two gasoline engines 5 and the gasoline tank 6 are arranged in the saw box 4, the gasoline tank 6 is connected with the two gasoline engines 5, the saw arm 7 is vertically arranged at the lower end of the saw box 4, the base 8 is arranged at the lower end of the saw arm 7, each guide plate 9 is provided with one chain tooth 10, the chain teeth 10 on each guide plate 9 are transmitted around the outer contour of the guide plate 9, the plurality of guide plates 9 are divided into four cutting units, the plurality of guide plates 9 of each cutting unit are sequentially arranged from top to bottom, a space L is reserved between every two adjacent guide plates 9, the four cutting units are arranged around the saw arm 7 in a rectangular array mode, and the four cutting units are connected with the transmission component arranged in the saw box 4 and the saw arm 7, the power of the transmission assembly is provided by two gasoline engines 5, and the sprocket 10 on two adjacent guide plates 9 in each cutting unit are driven by the transmission assembly to have opposite transmission directions.
The oil circuit switch of gasoline engine 5 in this embodiment hangs saw 3 is equipped with bluetooth receiving arrangement, can receive close signal, is convenient for hang the opening of saw 3 and stop according to actual conditions fast operation and control, uses more nimble reliable, also saves the petrol energy simultaneously, prevents to hang the saw and still be in operating condition when need not felling work.
The middle part of the saw arm of the embodiment is provided with a guide plate, and the edge of the guide plate is provided with sprocket teeth; the saw arm is of a hollow structure, and a chain and a transmission assembly are arranged in the saw arm and are used for connecting all chain teeth with the gasoline engine in the saw box.
The base of this embodiment is cast iron material, can play counter weight and stabilize the holistic function of hanging the saw.
The guide plates of the present embodiment have four rows, four in each row; each row is directly at an angle of 90 degrees; the guide plate is in a right-angled triangle shape, each angle is in an arc shape, and the edge of the guide plate is provided with a sprocket; the moving direction of the chain teeth is shown in fig. 2 to 6, and the moving direction of the chain teeth is opposite in the embodiment, so that branches can be effectively prevented from being clamped between two adjacent guide plates, and the device can be prevented from being damaged or incapable of working normally.
The hoist of this embodiment, located at the bottom of or inside the cabin of the helicopter 1, is powered by the helicopter and can control the retraction and release of the suspension cable under the control of the control mechanism.
The control mechanism of this embodiment can control the lift and withdraw and release the hoist cable, can pass through the oil circuit switch in the bluetooth control saw case.
After the hanging saw storage rack is used, the hanging saw storage rack is placed on the hanging saw storage rack, the hanging saw storage rack is composed of metal fences, the hanging saw can be protected to be stably erected, and the chain teeth cannot hurt people and objects.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 2 to 6, and the guide plate 9 of the present embodiment is a right-angled triangular guide plate. So set up, can relax, quick insert when lightening weight and fell in lush branch. Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 2 to 6, the transmission assembly of the present embodiment includes a first transmission unit and a second transmission unit, the first transmission unit includes a first driven sprocket shaft 15, two first chains 11, a plurality of first sprocket shafts 12, two first driving sprockets 13 and two first driven sprockets 14, two gasoline engines 5 are oppositely disposed, one first driving sprocket 13 is sleeved on an output shaft of each gasoline engine 5, the first driven sprocket shaft 15 is rotatably mounted at a lower portion of the saw arm 7, the two first driven sprockets 14 are mounted on the first driven sprocket shaft 15, the two first driving sprockets 13 and the two first driven sprockets 14 are respectively connected by one first chain 11, the plurality of first sprocket shafts 12 are mounted on the guide plates 9 of the two cutting units which are oppositely disposed, and the plurality of first sprocket shafts 12 are mounted on the guide plates 9 of odd number or even number which are counted from top to bottom, the first chain wheel shafts 12 on the guide plates 9 of the two oppositely arranged cutting units are respectively meshed with the tight edge and the loose edge of the same first chain 11 to realize the rotation of the guide plates 9 in different rotation directions; the second transmission unit comprises two second connecting shafts 16, two second transmission chain wheels 17, two worm wheels 18, two worm screws 19, a plurality of second driving chain wheels 20, a plurality of second chains 21 and a plurality of second chain wheel shafts 22, the two second connecting shafts 16 are respectively and rotatably mounted on the saw arm 7, each second connecting shaft 16 is provided with one second transmission chain wheel 17, the second transmission chain wheel 17 is meshed with one chain 11 of the two first chains 11, the transmission directions of the two second transmission chain wheels 17 when meshed with the two first chains 11 are opposite, each two second connecting shafts 16 are provided with one worm wheel 18, each worm wheel 18 is meshed with one worm screw 19, each worm screw 19 shaft is sleeved with a plurality of second driving chain wheels 20, the plurality of second chain wheel shafts 22 are rotatably mounted on the guide plates 9 of the two cutting units which are oppositely arranged, and the plurality of second chain wheel shafts 22 are mounted on the odd number guide plates 9 or even number guide plates 9 of the number from top to bottom, each second sprocket shaft 22 on the guide plates 9 of the two oppositely arranged cutting units is connected with a second driving sprocket 20 through a second chain 21, so that the chain teeth 10 on the odd number guide plates 9 or the even number guide plates 9 are driven to rotate in different rotation directions.
So set up, the transmission assembly of this embodiment has two transmission units to constitute, and a transmission unit is used for driving two relative cutting units, and the transmission direction of two adjacent sprocket on every cutting unit is different, and then makes whole hanging saw can not take place the branch bite. Although a plurality of mechanical parts are adopted for transmission, the mutual interference is avoided, because the chain wheel shafts adopted by the embodiment all extend out of the guide plate, and driven chain wheels are arranged at the top corners inside the guide plate for matching use. Other components and connection relationships are the same as those in the second embodiment.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1, and the embodiment further includes a lifting mechanism, the lifting mechanism includes two rollers 23, a lifting ring 24 and two driving motors 26, the helicopter 1 and the saw box 4 are respectively installed in one roller 23 and one driving motor 26, an output shaft of the driving motor 26 is connected with the roller 23, two ends of the lifting rope 2 are respectively wound on one roller 23, and the lifting ring 24 is installed at the upper end of the saw box 4. So set up, be convenient for according to actual need select the quantity of cylinder and driving motor 26, when adopting a driving motor, the preferential installation of helicopter is received and is released the mechanism, if adopt under the condition of two driving motor, can be quick the realization hang the receipts of saw and release. Other compositions and connection relations are the same as those of the third embodiment.
The fifth concrete implementation mode: the present embodiment is described with reference to fig. 2, and the number of the guide plates 9 per cutting unit of the present embodiment is 4, 6, or 8. So set up, be convenient for select the guide board of suitable quantity according to the condition of trees. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.
The sixth specific implementation mode: referring to fig. 3, the embodiment is described, in which the distance L between two adjacent guide plates 9 is 6 to 10 cm. According to the arrangement, the branch is prevented from being clamped inside, and the small branches can be rapidly taken out along with the driving of the chain teeth with two adjacent different transmission directions. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.
The seventh embodiment: referring to fig. 2, the embodiment will be described, and the method for using the cutting device for cutting branches intruding into a power transmission channel of the embodiment comprises the following steps:
the method comprises the following steps: inspecting the weather condition and the power transmission line grade condition according to the airplane line patrol regulation, and determining a flight route;
step two: determining the oil quantity required by the hanging saw according to the investigation result in the step one, filling oil into the gasoline tank 6, and charging a control module 25 in the hanging saw box 4;
step three: when the region needing to cut branches is reached, the hanging saw 3 is started through the gasoline engine 5, the winding length of the sling 2 on the roller is controlled through the control module 25, the height of the hanging saw 3 is further controlled, the helicopter 1 continuously flies forwards, and in the flying process of the helicopter 1, the transmission directions of the chain teeth 10 on the guide plates 9 in the four cutting units on the hanging saw 3 are different, so that the helicopter can quickly cut when the helicopter touches the branches until all the branches invading into a power transmission channel are cut;
step four: the oil way in the hanging saw 3 is closed through the Bluetooth module in the control module 25, and the gasoline engine 5 stops working;
the suspension cable 2 on the roller 23 is driven to release through the rotation direction of a driving motor 26 in the control module 25 until the base 8 below the hanging saw 3 is stably landed, and after the helicopter 1 falls in a safe place, personnel disassemble the suspension cable 2 and the hanging ring 24 and withdraw all the suspension cables 2;
step five: the inspection hangs saw 3, changes sprocket 11 and other parts of damage, for saw arm 7 and saw incasement 4 mechanical structure clearance piece and oil, all transmission assembly of fastening, after the surplus fuel in the saw case 4 of saw 3 is hung in the clearance, for hanging saw 3 installs the protective sheath additional to the locking is accomodate in the frame in the special use.

Claims (5)

1. A cutting device for cutting branches intruding into a transmission channel, comprising a helicopter (1), characterized in that: it also comprises a sling (2) and a hanging saw (3), the helicopter (1) and the hanging saw (3) are connected through the sling (2),
the hanging saw (3) comprises a saw box (4), two gasoline engines (5), a gasoline tank (6), a saw arm (7), a base (8), a transmission assembly, a plurality of guide plates (9) and a plurality of chain teeth (10), wherein the two gasoline engines (5) and the gasoline tank (6) are installed in the saw box (4), the gasoline tank (6) is connected with the two gasoline engines (5), the saw arm (7) is vertically installed at the lower end of the saw box (4), the base (8) is installed at the lower end of the saw arm (7), one chain tooth (10) is installed on each guide plate (9), the chain teeth (10) on each guide plate (9) are in transmission around the outer contour of the guide plate (9), the guide plates (9) are divided into four cutting units, the guide plates (9) of each cutting unit are sequentially arranged from top to bottom, a distance (L) is reserved between every two adjacent guide plates (9), and the distance (L) is 8-10cm, four cutting units are installed around saw arm (7) with the mode of rectangle array, and four cutting units are connected through the drive assembly who installs in saw case (4) and saw arm (7), drive assembly's power is provided by two gasoline engine (5), and sprocket (10) on two adjacent guide plates (9) in every cutting unit are opposite in transmission direction under drive assembly's drive, and first guide plate (9) in every cutting unit are clockwise transmission.
2. A cutting device for cutting branches intruding into a transmission channel as claimed in claim 1, characterized in that: the guide plate (9) is a right-angled triangle guide plate.
3. A cutting device for cutting branches intruding into a transmission channel according to claim 2, characterized in that: the transmission assembly comprises a first transmission unit and a second transmission unit,
the first transmission unit comprises a first driven chain wheel shaft (15), two first chains (11), a plurality of first chain wheel shafts (12), two first driving chain wheels (13) and two first driven chain wheels (14),
the two gasoline engines (5) are oppositely arranged, a first driving sprocket (13) is sleeved on an output shaft of each gasoline engine (5), a first driven sprocket shaft (15) is rotatably arranged at the lower part of the saw arm (7), two first driven sprockets (14) are arranged on the first driven sprocket shaft (15), the two first driving sprockets (13) and the two first driven sprockets (14) are respectively connected through a first chain (11), a plurality of first sprocket shafts (12) are arranged on guide plates (9) of two cutting units which are oppositely arranged, and a plurality of first chain wheel shafts (12) are arranged on the odd guide plates (9) or the even guide plates (9) from top to bottom, the first chain wheel shafts (12) on the guide plates (9) of the two oppositely arranged cutting units are respectively meshed with the tight edge and the loose edge of the same first chain (11) to realize the rotation of the guide plates (9) in different rotation directions;
the second transmission unit comprises two second connecting shafts (16), two second transmission chain wheels (17), two worm wheels (18), two worms (19), a plurality of second driving chain wheels (20), a plurality of second chains (21) and a plurality of second chain wheel shafts (22),
two second connecting shafts (16) are respectively rotatably arranged on the saw arm (7), each second connecting shaft (16) is provided with a second transmission chain wheel (17), the second transmission chain wheels (17) are meshed with one chain (11) of the two first chains (11), the transmission directions of the two second transmission chain wheels (17) when meshed with the two first chains (11) are opposite, each second connecting shaft (16) is provided with a turbine (18), each turbine (18) is meshed with a worm (19), a plurality of second driving chain wheels (20) are sleeved on each worm (19) shaft, a plurality of second chain wheel shafts (22) are rotatably arranged on the guide plates (9) of the two cutting units which are oppositely arranged, and the plurality of second chain wheel shafts (22) are arranged on the odd guide plates (9) or the even guide plates (9) from top to bottom, each second chain wheel shaft (22) on the guide plates (9) of the two cutting units which are oppositely arranged is connected with a second driving chain wheel (20) through a second chain (21) to drive the chain teeth (10) on the odd number guide plates (9) or the even number guide plates (9) to rotate in different rotation directions.
4. A cutting device for cutting branches intruding into a transmission channel according to claim 3, characterized in that: it still includes elevating system, and elevating system includes two cylinders (23), rings (24) and two driving motor (26), installs respectively in helicopter (1) and saw case (4) and has a cylinder (23) and a driving motor (26), the output shaft and the cylinder (23) of driving motor (26) are connected, and the both ends of hoist cable (2) are twined respectively on a cylinder (23), and rings (24) are installed in the upper end of saw case (4).
5. A cutting apparatus for cutting branches intruding into power transmission channels according to claim 4, characterized in that: the number of guide plates (9) per cutting unit is 4, 6 or 8.
CN202120308329.XU 2021-02-03 2021-02-03 A felling device for felling invade transmission of electricity passageway branch Expired - Fee Related CN214257271U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120308329.XU CN214257271U (en) 2021-02-03 2021-02-03 A felling device for felling invade transmission of electricity passageway branch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120308329.XU CN214257271U (en) 2021-02-03 2021-02-03 A felling device for felling invade transmission of electricity passageway branch

Publications (1)

Publication Number Publication Date
CN214257271U true CN214257271U (en) 2021-09-24

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ID=77770415

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120308329.XU Expired - Fee Related CN214257271U (en) 2021-02-03 2021-02-03 A felling device for felling invade transmission of electricity passageway branch

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CN (1) CN214257271U (en)

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Granted publication date: 20210924

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