CN115043344A - Special 35 kV PT hoisting structure and hoisting method - Google Patents
Special 35 kV PT hoisting structure and hoisting method Download PDFInfo
- Publication number
- CN115043344A CN115043344A CN202210788737.9A CN202210788737A CN115043344A CN 115043344 A CN115043344 A CN 115043344A CN 202210788737 A CN202210788737 A CN 202210788737A CN 115043344 A CN115043344 A CN 115043344A
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- steel cable
- fixed pulley
- winch
- lifting
- hoisting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
- B66C13/085—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/40—Applications of devices for transmitting control pulses; Applications of remote control devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
- B66D3/26—Other details, e.g. housings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
本发明涉及一种35千伏PT专用吊装结构及吊装方法，属于吊装设备技术领域。技术方案是：底座（8）的上表面一端垂直设置两根竖梁（5），两根竖梁一侧上端分别设置横梁（2），横梁通过安装架一（9）与底座连接，卷扬机（6）设置在安装架一上，卷扬机上设有钢缆；两根竖梁另一侧设置U型抱箍（4），U型抱箍设置在电线杆底部；倒U型梁板（10）设置在电线杆的横担上，倒U型梁板的下表面中部设置吊耳二（13），吊耳二与安装架二（12）连接，安装架二的下端设有定滑轮（11），起吊装置的钢缆设置在定滑轮上。本发明的有益效果：使用经济性高，作业过程中操作灵敏，可实现小距离精准移动，停止操作后能自动锁止，不会发生松动现象。
The invention relates to a 35kV PT special hoisting structure and a hoisting method, belonging to the technical field of hoisting equipment. The technical scheme is as follows: two vertical beams (5) are vertically arranged at one end of the upper surface of the base (8), and cross beams (2) are respectively arranged at the upper end of one side of the two vertical beams. 6) It is set on the first mounting frame, and the hoist is provided with a steel cable; the other side of the two vertical beams is provided with a U-shaped hoop (4), and the U-shaped hoop is set at the bottom of the utility pole; the inverted U-shaped beam plate (10) It is arranged on the cross arm of the utility pole, and the middle of the lower surface of the inverted U-shaped beam plate is provided with two lifting lugs (13), which are connected with the second mounting frame (12), and the lower end of the second mounting frame is provided with a fixed pulley (11). , the steel cable of the hoisting device is set on the fixed pulley. The beneficial effects of the invention are as follows: the use economy is high, the operation is sensitive during the operation, the precise movement in a small distance can be realized, and the operation can be automatically locked after the operation is stopped, and the phenomenon of loosening will not occur.
Description
Technical Field
The invention relates to a special hoisting structure and a hoisting method for 35 kV PT, and belongs to the technical field of hoisting equipment.
Background
The voltage transformer PT is an instrument for transforming voltage, is mainly used for supplying power to a measuring instrument and a relay protection device, is used for measuring the voltage, power and electric energy of a line, or is used for protecting valuable equipment, a motor and a transformer in the line when the line breaks down; and the 35 kV PT is a common voltage transformer, the weight of the 35 kV transformer substation high-voltage PT is about 100kg, and professional hoisting equipment is required to be used during installation. Often these hoisting equipment are itself heavier, and go out large-scale hoisting machinery construction, can't accurately hoist 35 kilovolts of PT to suitable position. The existing 35 kV PT hoisting equipment is poor in economy, sensitivity and controllability during operation.
Disclosure of Invention
The invention aims to provide a special 35 kV PT hoisting structure and a hoisting method, which improve the economy, have uniform and appropriate speed in the ascending and descending process, have sensitive remote controller operation, can realize small-distance accurate movement, can automatically lock after stopping operation, do not have the loosening phenomenon, realize controllability and solve the problems in the background technology.
The technical scheme of the invention is as follows:
a hoisting structure special for 35 KV PT comprises a hoisting device and a hoisting device, wherein the hoisting device comprises a cross beam, a lifting hook, a U-shaped hoop, vertical beams, a winch, a base and a first mounting frame; the other side of the two vertical beams is provided with a U-shaped hoop which is arranged at the bottom of the telegraph pole; the hoisting device comprises an inverted U-shaped beam plate, a fixed pulley and a second mounting frame, the inverted U-shaped beam plate is arranged on a cross arm of the telegraph pole, the middle of the lower surface of the inverted U-shaped beam plate is provided with a second lifting lug, the second lifting lug is connected with the second mounting frame, the lower end of the second mounting frame is provided with the fixed pulley, a steel cable of the hoisting device is arranged on the fixed pulley, and the steel cable is guided through the fixed pulley.
The lower surface of base is equipped with the locking universal wheel, and the quantity of locking universal wheel is four, and four locking universal wheel evenly distributed make things convenient for the short distance to remove at the lower surface of base.
The outer side surfaces of the two ends of the cross beam are respectively provided with a first lifting lug, so that the transportation is convenient.
The U-shaped hoops are arranged on the other sides of the two vertical beams from top to bottom and are fixedly connected with the cross beam and the base through bolts.
The steel cable is provided with two insulating pipes, the upper ends of the two insulating pipes are fixedly connected with the mounting rack, the lower end of one insulating pipe is close to the lifting hook, and the lower end of the other insulating pipe is close to the winch.
Two the length of insulating tube is 1m and 0.5m respectively, and the insulating tube length that is close to the lifting hook setting is 0.5m, and the insulating tube length that is close to the hoist engine setting is 1m, and the insulating tube bottom that is close to the hoist engine is fixed to be set up the vase to increase the counter weight, reinforcing protective properties.
The utility model discloses a wire pole, including wire rope, the wire pole, the U-shaped roof beam board that falls contains diaphragm and two risers, and the both ends of diaphragm are connected with two risers respectively, and the diaphragm arm is on the cross arm of wire pole, and two risers arrange downwards, and lug two sets up between two risers, and the U-shaped roof beam board that falls passes through wire rope ligature on the cross arm of wire pole, plays the fixed action.
The winch is controlled to act through a remote controller, and the winch and the remote controller are well known in the art and are sold in the market.
The hoisting method special for the 35 kV PT adopts the hoisting structure and comprises the following steps: fixing a hoisting device at the bottom of a telegraph pole through a U-shaped hoop, installing an inverted U-shaped beam plate of the hoisting device on a cross arm of the telegraph pole, paying out a steel cable on a winch, checking whether the steel cable is broken or stranded, and if not, fixing the steel cable on the winch on a lifting hook through a fixed pulley; the PT is placed on the tray and fixed by a lifting rope, the lifting hook is hung on the lifting rope, and the fixed pulley is locked to prevent the steel cable from falling off; the operating personnel A operates the remote controller, lifts up the PT, and after hoisting to the suitable position operating personnel A utilizes the bolt to fix the PT, screws up the bolt after operating the remote controller and emits one section steel cable, take off the lifting hook can.
The method comprises the following specific steps:
insulating pipes are respectively arranged on steel cables between the fixed pulley and the lifting hook and between the fixed pulley and the winch, the upper ends of the two insulating pipes are fixedly connected with the mounting rack through steel wires and are screwed down by tool tongs to prevent the two insulating pipes from falling off, and porcelain bottles are arranged at the lower ends of the insulating pipes between the fixed pulley and the winch to increase the balance weight and enhance the protection performance.
The invention has the beneficial effects that: the use economy is high, the operation is sensitive in the operation process, the small-distance accurate movement can be realized, the automatic locking can be realized after the operation is stopped, and the loosening phenomenon cannot occur; the first lifting lug is convenient to transport, the lifting device can be fixed on a telegraph pole through the U-shaped hoop, the locking universal wheels are convenient to move in position, and the steel cable can be guided through the fixed pulley.
Drawings
FIG. 1 is a schematic view of the structure of a lifting device of the present invention;
FIG. 2 is a side view of the lifting device of the present invention;
FIG. 3 is a schematic structural view of the hoisting device of the present invention;
FIG. 4 is a schematic view of the present invention in use;
FIG. 5 is a pictorial view of a lifting device of the present invention;
FIG. 6 is a diagram of a lifting device of the present invention;
in the figure: the lifting device comprises a first lifting lug 1, a cross beam 2, a lifting hook 3, a U-shaped hoop 4, a vertical beam 5, a winch 6, a locking universal wheel 7, a base 8, a first mounting rack 9, an inverted U-shaped beam plate 10, a fixed pulley 11, a second mounting rack 12 and a second lifting lug 13.
Detailed Description
The present invention will be further described by way of examples with reference to the accompanying drawings.
A hoisting structure special for 35 KV PT comprises a hoisting device and a hoisting device, wherein the hoisting device comprises a cross beam 2, a lifting hook 3, a U-shaped hoop 4, vertical beams 5, a winch 6, a base 8 and a first mounting rack 9, two vertical beams 5 are vertically arranged at one end of the upper surface of the base 8, the two vertical beams 5 are symmetrically arranged in the front and back direction, the cross beam 2 is arranged at the upper end of one side of each vertical beam 5, the cross beam 2 is connected with the base 8 through the first mounting rack 9, the winch 6 is arranged on the first mounting rack 9, a steel cable is arranged on the winch 6, and the lifting hook 3 is arranged on the steel cable; the other side of each vertical beam 5 is provided with a U-shaped anchor ear 4, and the U-shaped anchor ear 4 is arranged at the bottom of the telegraph pole; the hoisting device comprises an inverted U-shaped beam plate 10, a fixed pulley 11 and a second mounting frame 12, the inverted U-shaped beam plate 10 is arranged on a cross arm of a telegraph pole, the middle of the lower surface of the inverted U-shaped beam plate 10 is provided with a second lifting lug 13, the second lifting lug 13 is connected with the second mounting frame 12, the lower end of the second mounting frame 12 is provided with the fixed pulley 11, a steel cable of the hoisting device is arranged on the fixed pulley 11, and the steel cable is guided through the fixed pulley 11.
The lower surface of base 8 is equipped with locking universal wheel 7, and the quantity of locking universal wheel 7 is four, and four locking universal wheels 7 evenly distributed make things convenient for the short distance to remove at the lower surface of base 8.
The outer side surfaces at two ends of the cross beam 2 are respectively provided with a lifting lug 1, so that the transportation is convenient.
The U-shaped anchor ears 4 are arranged at the other sides of the two vertical beams 5 up and down, and are fixedly connected with the cross beam 2 and the base 8 through bolts.
The steel cable is provided with two insulating pipes, the upper ends of the two insulating pipes are fixedly connected with the second mounting rack 12, the lower end of one insulating pipe is close to the lifting hook 3, and the lower end of the other insulating pipe is close to the winch.
Two the length of insulating tube is 1m and 0.5m respectively, and the insulating tube length that is close to lifting hook 3 and sets up is 0.5m, and the insulating tube length that is close to the hoist engine setting is 1m, and the insulating tube bottom that is close to the hoist engine is fixed to be set up the vase to increase the counter weight, reinforcing protective properties.
The inverted U-shaped beam plate 10 comprises a transverse plate and two vertical plates, the two ends of the transverse plate are respectively connected with the two vertical plates, the transverse plate is supported on the cross arm of the telegraph pole, the two vertical plates are arranged downwards, the two lifting lugs 13 are arranged between the two vertical plates, and the inverted U-shaped beam plate 10 is bound on the cross arm of the telegraph pole through a steel wire rope to play a role in fixing.
The winch 6 is controlled to operate by a remote controller, and the winch and the remote controller are well known in the art and are sold in the market.
The hoisting method special for the 35 kV PT adopts the hoisting structure and comprises the following steps: fixing a hoisting device at the bottom of a telegraph pole through a U-shaped hoop 4, installing an inverted U-shaped beam plate 10 of the hoisting device on a cross arm of the telegraph pole, paying out a steel cable on a winch 6, checking whether the steel cable is broken or stranded, if not, fixing the steel cable on the winch 6 on a lifting hook 3 through a fixed pulley 11, placing PT on a tray and fixing the PT by using a lifting rope, hanging the lifting hook on the lifting rope, locking the fixed pulley 11 and preventing the steel cable from falling off; the operating personnel A operates the remote controller, lifts up the PT, and after the hoist and mount put in suitable position, operating personnel A utilizes the bolt to fix the PT, and the operating remote controller emits one section steel cable after screwing up the bolt, and it can to take off the lifting hook.
The method comprises the following specific steps:
insulating pipes are respectively arranged on the steel cables between the fixed pulley 11 and the lifting hook as well as between the fixed pulley 11 and the winch, the upper ends of the two insulating pipes are fixedly connected with the second mounting rack 12 through steel wires and are screwed down by using tool pliers to prevent the two insulating pipes from falling off, and porcelain bottles are arranged at the lower ends of the insulating pipes between the fixed pulley 11 and the winch to increase the balance weight and enhance the protection performance.
In this embodiment, referring to fig. 1 to 6, the locking universal wheels 7 are arranged on the lower surface of the base 8, the number of the locking universal wheels 7 is four, the four locking universal wheels 7 are uniformly distributed on the lower surface of the base 8, and the locking universal wheels 7 are arranged to facilitate position movement; the right end of the upper surface of the base 8 is provided with two vertical beams 5, the two vertical beams 5 are symmetrically arranged on the upper surface of the base 8 from front to back, the front and back of the upper end of the left side of each vertical beam 5 are respectively provided with a cross beam 2, the left end and the right end of the outer side surface of each cross beam 2 are respectively provided with a lifting lug 1, and the lifting lugs 1 are arranged to facilitate transportation of equipment; the winch 6 is fixedly connected with the cross beam 2 and the base 8 through a first mounting frame 9, the U-shaped anchor ears 4 are arranged on the right side faces of the cross beam 2 and the base 8, the U-shaped anchor ears 4 are fixedly connected with the cross beam 2 and the base 8 through bolts respectively, and the hoisting device can be fixed on a telegraph pole through the U-shaped anchor ears 4; the middle part of the lower surface of the U-shaped beam plate 10 is provided with a second lifting lug 13, the second lifting lug 13 is connected with a second mounting frame 12 through a bolt, the lower end of the mounting frame 12 is provided with a fixed pulley 11, and a steel cable can be guided through the fixed pulley 11. The device is high in economical efficiency, sensitive in operation in the operation process, capable of realizing small-distance accurate movement, capable of automatically locking after stopping operation and free of loosening.
When the lifting device is used, an operator fixes the lifting device at the bottom of a telegraph pole through the U-shaped hoop 4, installs the inverted U-shaped beam plate 10 of the lifting device on a cross arm of the telegraph pole, releases a steel cable, checks whether the steel cable is broken or stranded, if the steel cable is not broken, connects the steel cable of the winch 6 with the lifting hook 3 after sequentially passing through an insulating pipe with the length of 1m, the fixed pulley 11 and an insulating pipe with the length of 0.5m, the two insulating pipes are arranged close to the fixed pulley 11, separates the two insulating pipes along straight lines respectively, fixes the upper ends of the two insulating pipes on the second mounting frame 12 through steel wires, and screws the two insulating pipes through a tool clamp to prevent falling; fixing a porcelain insulator at the bottom of an insulating tube with the length of 1m by using an insulating rope to increase a balance weight and enhance the protection performance; place PT on the tray fixedly with the lifting rope, the lifting hook is hung on the lifting rope, and prevent that wire rope from droing with fixed pulley 11 shutting, operation personnel A operates the remote controller, hoist PT, and operation personnel B utilizes a rope control lateral position of ligature on the tray simultaneously, continues the holding position by operation personnel B after hoisting to suitable position, and operation personnel A utilizes the bolt to fix PT, and operation remote control emits some wire rope behind the tightening bolt, take off lifting hook 3 can.
Claims (8)
1. The utility model provides a special hoisting structure of 35 kilovolts of PT which characterized in that: the lifting device comprises a cross beam (2), a lifting hook (3), a U-shaped hoop (4), vertical beams (5), a winch (6), a base (8) and a first mounting frame (9), wherein one end of the upper surface of the base (8) is vertically provided with the two vertical beams (5), the two vertical beams (5) are symmetrically arranged front and back, the upper ends of one sides of the two vertical beams (5) are respectively provided with the cross beam (2), the cross beam (2) is connected with the base (8) through the first mounting frame (9), the winch (6) is arranged on the first mounting frame (9), the winch (6) is provided with a steel cable, and the lifting hook (3) is arranged on the steel cable; the other side of each vertical beam (5) is provided with a U-shaped anchor ear (4), and the U-shaped anchor ear (4) is arranged at the bottom of the telegraph pole; the hoisting device comprises an inverted U-shaped beam plate (10), a fixed pulley (11) and a second mounting frame (12), the inverted U-shaped beam plate (10) is arranged on a cross arm of a telegraph pole, the middle part of the lower surface of the inverted U-shaped beam plate (10) is provided with a second lifting lug (13), the second lifting lug (13) is connected with the second mounting frame (12), the lower end of the second mounting frame (12) is provided with the fixed pulley (11), and a steel cable of the hoisting device is arranged on the fixed pulley (11) and is guided through the fixed pulley (11).
2. The special hoisting structure for 35 kilovolt PT of claim 1, characterized in that: the lower surface of base (8) is equipped with locking universal wheel (7), and the quantity of locking universal wheel (7) is four, and four locking universal wheels (7) evenly distributed make things convenient for the short distance to remove at the lower surface of base (8).
3. The special hoisting structure for 35 kilovolt PT according to claim 1 or 2, characterized in that: the outer side surfaces at two ends of the cross beam (2) are respectively provided with a first lifting lug (1), so that the transportation is convenient.
4. The special hoisting structure for 35 kilovolt PT according to claim 1 or 2, characterized in that: the number of U type staple bolt (4) is two, and two U type staple bolts (4) are arranged from top to bottom at two perpendicular roof beam (5) opposite sides, through bolt respectively with crossbeam (2) and base (8) fixed connection.
5. The special hoisting structure for 35 kilovolt PT according to claim 1 or 2, characterized in that: the steel cable is provided with two insulating pipes, the upper ends of the two insulating pipes are fixedly connected with the second mounting rack (12), the lower end of one insulating pipe is close to the lifting hook (3), and the lower end of the other insulating pipe is close to the winch.
6. The special hoisting structure for 35 kilovolt PT according to claim 1 or 2, characterized in that: the utility model discloses a wire pole, including the wire pole, the type of falling U roof beam slab (10) are connected with the cross arm of wire pole, and the type of falling U roof beam slab (10) contain diaphragm and two risers, and the both ends of diaphragm are connected with two risers respectively, and the diaphragm is born on the cross arm of wire pole, and two risers arrange downwards, and lug two (13) set up between two risers, and the type of falling U roof beam slab (10) pass through wire rope ligature on the cross arm of wire pole.
7. A special hoisting method for 35 kv PT, which adopts the hoisting structure defined in any one of claims 1 to 6, characterized by comprising the steps of: fixing a hoisting device at the bottom of a telegraph pole through a U-shaped hoop (4), installing an inverted U-shaped beam plate (10) of the hoisting device on a cross arm of the telegraph pole, paying out a steel cable on a winch (6), checking whether the steel cable is broken or stranded, if the steel cable is not broken, fixing the steel cable on the winch (6) on a lifting hook (3) through a fixed pulley (11), placing a PT on a tray and fixing the PT on the tray by using the lifting rope, hanging the lifting hook on the lifting rope, locking the fixed pulley (11) and preventing the steel cable from falling off; the operating personnel A operates the remote controller, lifts up the PT, and after the hoist and mount put in suitable position, operating personnel A utilizes the bolt to fix the PT, and the operating remote controller emits one section steel cable after screwing up the bolt, and it can to take off the lifting hook.
8. The special hoisting method for the 35 kV PT according to claim 7, characterized by comprising the following specific steps: the insulating tubes are arranged on the steel cables between the fixed pulley (11) and the lifting hook and between the fixed pulley and the winch respectively, the upper ends of the two insulating tubes are fixedly connected with the second mounting rack (12) through steel wires and are screwed down by tool tongs to prevent falling off, and the lower ends of the insulating tubes between the fixed pulley (11) and the winch are provided with porcelain bottles to increase the balance weight and enhance the protection performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210788737.9A CN115043344A (en) | 2022-07-06 | 2022-07-06 | Special 35 kV PT hoisting structure and hoisting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210788737.9A CN115043344A (en) | 2022-07-06 | 2022-07-06 | Special 35 kV PT hoisting structure and hoisting method |
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| Publication Number | Publication Date |
|---|---|
| CN115043344A true CN115043344A (en) | 2022-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210788737.9A Pending CN115043344A (en) | 2022-07-06 | 2022-07-06 | Special 35 kV PT hoisting structure and hoisting method |
Country Status (1)
| Country | Link |
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| CN (1) | CN115043344A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203434492U (en) * | 2013-08-27 | 2014-02-12 | 江西萍乡供电公司 | Combination-type electric hoisting apparatus |
| CN203781735U (en) * | 2014-05-04 | 2014-08-20 | 国家电网公司 | Bi-directional lifting pulley with locking device |
| GB201701219D0 (en) * | 2017-01-25 | 2017-03-08 | Nesbit Carl | Flue mounted hoist |
| CN206783214U (en) * | 2017-05-26 | 2017-12-22 | 电管家能源管理（上海）有限公司 | Distribution switchgear cabinet lifts hanging device |
| CN108557660A (en) * | 2018-03-16 | 2018-09-21 | 许德利 | A kind of handling device for large-scale furniture |
| CN109467015A (en) * | 2018-11-20 | 2019-03-15 | 国网安徽省电力有限公司蚌埠供电公司 | Small split type electric lifting device |
| KR101947512B1 (en) * | 2018-10-10 | 2019-05-21 | 주식회사 인덕 | Movable Assembly Type Lifting Apparatus for On Load Tap Changer |
| CN214028683U (en) * | 2020-11-14 | 2021-08-24 | 温州钱联塑业有限公司 | Plastic pipe transportation frame |
-
2022
- 2022-07-06 CN CN202210788737.9A patent/CN115043344A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203434492U (en) * | 2013-08-27 | 2014-02-12 | 江西萍乡供电公司 | Combination-type electric hoisting apparatus |
| CN203781735U (en) * | 2014-05-04 | 2014-08-20 | 国家电网公司 | Bi-directional lifting pulley with locking device |
| GB201701219D0 (en) * | 2017-01-25 | 2017-03-08 | Nesbit Carl | Flue mounted hoist |
| CN206783214U (en) * | 2017-05-26 | 2017-12-22 | 电管家能源管理（上海）有限公司 | Distribution switchgear cabinet lifts hanging device |
| CN108557660A (en) * | 2018-03-16 | 2018-09-21 | 许德利 | A kind of handling device for large-scale furniture |
| KR101947512B1 (en) * | 2018-10-10 | 2019-05-21 | 주식회사 인덕 | Movable Assembly Type Lifting Apparatus for On Load Tap Changer |
| CN109467015A (en) * | 2018-11-20 | 2019-03-15 | 国网安徽省电力有限公司蚌埠供电公司 | Small split type electric lifting device |
| CN214028683U (en) * | 2020-11-14 | 2021-08-24 | 温州钱联塑业有限公司 | Plastic pipe transportation frame |
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Application publication date: 20220913 |