CN111689428A - Trolley for online replacement of cooling fan of dry-type transformer and replacement method - Google Patents
Trolley for online replacement of cooling fan of dry-type transformer and replacement method Download PDFInfo
- Publication number
- CN111689428A CN111689428A CN202010594625.0A CN202010594625A CN111689428A CN 111689428 A CN111689428 A CN 111689428A CN 202010594625 A CN202010594625 A CN 202010594625A CN 111689428 A CN111689428 A CN 111689428A
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- Prior art keywords
- guide rail
- cooling fan
- trolley
- dry
- longitudinal guide
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- 238000001816 cooling Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 19
- 210000001503 joint Anatomy 0.000 description 7
- 238000009413 insulation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
- B66F7/14—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks screw operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G35/00—Mechanical conveyors not otherwise provided for
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The invention belongs to the technical field of transformers, and particularly discloses a trolley for online replacement of a cooling fan of a dry-type transformer and a replacement method, wherein a lower-layer trolley body of the trolley comprises a frame-type trolley body and rollers arranged at the bottom of the trolley body, an upper-layer platform comprises a platform which is lifted relative to the trolley body, a longitudinal guide rail and a transverse guide rail, and the platform is provided with the longitudinal guide rail and the transverse guide rail which is vertical to the longitudinal guide rail; the method comprises the following steps: extending the longitudinal guide rail into the transformer box body, wherein the height of the longitudinal guide rail is consistent with that of the cooling fan guide rail and the longitudinal guide rail is aligned with that of the box body guide rail; the box body guide rail enters the longitudinal guide rail groove and is contacted with the longitudinal guide rail; and dragging the cooling fan out to enter the longitudinal guide rail, dragging the longitudinal guide rail out of the transformer box body, replacing the longitudinal guide rail with a new cooling fan, and then pushing the new cooling fan into the transformer box body along the longitudinal guide rail to complete online replacement. When the cooling fan is replaced under the condition that the dry-type transformer is not powered off, the cooling fan can be conveniently carried and quickly reloaded, manpower is reduced, and the replacement time of the cooling fan is shortened.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a trolley for online replacement of a cooling fan of a dry-type transformer and a replacement method.
Background
The dry-type transformer is a power supply device widely used at present, and is mostly a box-type transformer. In order to improve the power carrying capacity of the dry-type transformer, reduce the temperature rise during operation, delay the insulation aging of the transformer, and prolong the service life of the transformer, a cross-flow cooling fan is generally installed on each of the two sides below each winding post of the dry-type transformer, and the start and stop of the cross-flow cooling fans are controlled by a temperature controller installed on a transformer box body, so as to perform forced cooling on the dry-type transformer.
In order to reduce the damage to the insulation of the transformer winding when the cooling fan fails during the live operation of the dry-type transformer, a new cooling fan must be replaced as soon as possible. The cooling fan is located the transformer box, can not get into the transformer box under the circumstances of not having a power failure and carry out maintenance work in the transformer box. In order to replace a fault fan in a non-power-off state, namely, in an online state, so as to reduce power supply loss, a current common method is to install sliding blocks on two sides of the bottom of a cooling fan, install two parallel linear guide rails below the cooling fan, install the cooling fan on the linear guide rails through the sliding blocks, extend the guide rails to the vicinity of a shell of a transformer box body, and arrange an access window at a corresponding position on the shell. The maintenance window is opened during operation, and the fault fan can be dragged out of the transformer box body along the linear guide rail to be replaced under the condition that the transformer is not powered off. However, the cooling fans are long and thin, and the length of the cooling fans is large, and particularly, the three cooling fans on one side are connected together to be longer, so that the cooling fans are inconvenient to carry after being pulled out, and the cooling fans need to be operated by multiple persons in a matched manner. The longer the dry-type transformer loses the cooling fan, the higher the temperature rise, the greater the damage to the winding insulation, and the influence on the service life of the transformer.
Therefore, there is a need to develop a device and a replacement method, which can be more conveniently carried and quickly reinstalled when the dry-type transformer cooling fan is failed and needs to be replaced, so as to shorten the replacement time of the failed cooling fan, effectively prevent the insulation degradation of the dry-type transformer, and improve the operation reliability.
Disclosure of Invention
The invention aims to provide a trolley for online replacement of a cooling fan of a dry-type transformer and a replacement method, wherein the trolley and the replacement method can realize more convenient carrying and quicker reinstallation of the cooling fan of the dry-type transformer when the cooling fan is replaced under the condition that the dry-type transformer is not powered off, so that the labor is reduced, and the replacement time of the cooling fan of the dry-type transformer is shortened.
The technical scheme for realizing the purpose of the invention is as follows: the utility model provides a dolly that is used for dry-type transformer cooling blower to change on line, this dolly includes lower floor's automobile body and upper platform, and lower floor's automobile body includes frame-type automobile body, installs the gyro wheel in frame-type automobile body bottom, and upper platform is equipped with longitudinal rail, the transverse guide with longitudinal rail mutually perpendicular including platform, longitudinal rail and the transverse guide that can go up and down relatively frame-type automobile body on the platform.
And a screw and a nut which can lift the platform are arranged between the lower part of the platform and the upper part of the frame type vehicle body, and the nut which is rotationally connected with the screw is sleeved outside the screw.
The upper end of the screw is fixed on the platform, and the lower end of the screw is inserted into the frame type vehicle body.
The transverse guide rail is embedded in the platform, and a sliding block for transversely moving the longitudinal guide rail is arranged on the transverse guide rail.
The sliding block is connected with the longitudinal guide rail through a connecting piece.
The two ends of the longitudinal guide rail extend out of the surface of the platform, and one end of the longitudinal guide rail is provided with a groove.
The trough has an external bevel connectable to the end of the longitudinal rail of another trolley.
An online replacement method for a cooling fan of a dry-type transformer comprises the following steps:
and 5, replacing the cooling fan on the longitudinal guide rail with a new cooling fan, and pushing the new cooling fan into the dry-type transformer box body along the longitudinal guide rail to complete the on-line replacement of the cooling fan.
In the step 1, one end of the longitudinal guide rail with the groove extends into the dry-type transformer box body through the access window, and the longitudinal guide rail is close to a guide rail arranged at the lower part of the cooling fan.
In the step 2, the adjusting screw rod below the platform of the trolley is adjusted by rotating the round nut, so that the height of the longitudinal guide rail is consistent with that of the guide rail at the lower part of the cooling fan; the movable sliding block adjusts the longitudinal guide rail to be aligned with the guide rail in the dry type transformer box body.
After the guide rail in the dry type transformer box body in the step 3 enters the groove and is completely contacted with the longitudinal guide rail, the sliding block is locked, so that the longitudinal guide rail is fixed; the brake of the roller is pressed down, so that the trolley is fixed.
When the length of the dry-type transformer cooling fan exceeds the length of a single trolley, the dry-type transformer cooling fan is replaced on line after a plurality of trolleys are connected in series.
The trolley series connection steps are as follows: the end of the longitudinal guide rail on one trolley, which is not connected with the groove, is inserted into the groove of the longitudinal guide rail on the other trolley, so that the trolleys are connected in series.
The invention has the beneficial technical effects that:
(1) the whole of the online replacement trolley for the cooling fan is of a double-layer structure, the lower layer is a frame type trolley body with four rollers, and the rollers have a braking function and play a role in fixing the trolley after the trolley is in place. The upper layer of the trolley is a lifting platform. The upper layer of the trolley is a lifting platform, and two linear guide rails with the same specification as the lower part of the cooling fan in the dry-type transformer box are longitudinally and parallelly arranged on the platform. When the cooling fan breaks down and needs to be replaced, the guide rail on the trolley is in butt joint with the guide rail inside the transformer, and when the cooling fan is dragged out along the guide rail, the sliding block at the bottom of the cooling fan directly enters the guide rail on the trolley after coming out from the inner guide rail, so that the cooling fan is stably placed on the trolley. After the replacement is finished, a new cooling fan is pushed into the original position in the transformer box body along the two sections of guide rails.
(2) Two linear guide rails which are in the same specification as the transformer box body are arranged on the dry type transformer cooling fan online replacement trolley in parallel, the two sections of guide rails are in butt joint, when the cooling fan is drawn out from the transformer box body along the guide rails, the sliding block at the lower part of the cooling fan directly enters the guide rails on the online replacement trolley, so that the cooling fan is stably placed on the online replacement trolley, the cooling fan can be carried more conveniently, the cooling fan can be pushed along the guide rails during reloading, the operation is convenient and fast, manpower is saved, and the replacement time of the cooling fan is greatly shortened.
(3) Because the ground clearance of the cooling blower installation of different grade type dry-type transformer is the difference, for making a dolly can be applicable to the cooling blower that the mounting height is different, the upper deck platform of dolly is designed to be connected with lower floor's automobile body through four adjustable screw rods, through adjusting the extension length of these four screw rods, realizes the total height of adjustable dolly in certain extent to a dolly is applicable in the dry-type transformer cooling blower that the mounting height is different.
(4) In order to adjust the distance between two longitudinal linear guide rails on the trolley, two transverse linear guide rails perpendicular to the longitudinal guide rails are transversely installed on a platform on the upper layer of the trolley in an embedded mode, the upper plane of each guide rail is flush with the upper plane of the trolley, two sliding blocks are installed on each transverse guide rail and are respectively connected with the longitudinal guide rails on two sides through connecting pieces, the position of each transverse adjusting longitudinal guide rail can be adjusted by moving the sliding blocks, therefore, the distance between the two longitudinal guide rails is adjusted, each sliding block has a locking function, and the function of fixing the position of the longitudinal guide rails is achieved. Through embedded two transverse guide of installation on the platform of changing the dolly on line, longitudinal rail is connected with transverse guide through the slider, removes the interval that the slider just can adjust two longitudinal rail, also can carry out more accurate butt joint with the guide rail in the transformer box. The height of the trolley and the distance between the two longitudinal guide rails can be adjusted, the guide rails on the trolley and the guide rails in the transformer box can be precisely butted, and the trolley can be also suitable for replacing dry-type transformer cooling fans of different types.
(5) The upper platform of dolly is slightly extended to the one end of every longitudinal rail to connected a groove with the guide rail with the width, the left and right sides and the downside of the outer end in groove are outer bevel connection structure, and when the guide rail docks, the guide rail in the transformer box body can be more quick gets into in the groove, has also promoted butt joint stability through the fixed in groove. Through connect a groove of outband bevel connection in the one end of longitudinal rail, when the butt joint, other guide rails can be more rapid get into the inslot, have improved the speed of butt joint, and the stability after the butt joint has also been promoted to the fixed of guide rail in the groove.
(6) The other end of the longitudinal guide rail also slightly extends out of the platform, but is not connected with the groove, and can be butted with one end of the guide rail connecting groove on the other trolley. For the convenience of carrying, the total length of a single trolley is not suitable to be too long, and is generally controlled within 1.5 m. When the total length of the cooling fan is longer, the longitudinal guide rails on the trolleys can be butted with each other end to end, the trolleys can be connected in series, the length of the trolleys is prolonged, and therefore the replacement requirement of the longer cooling fan can be met.
Drawings
FIG. 1 is a schematic structural diagram of a trolley for online replacement of a cooling fan of a dry-type transformer according to the present invention;
fig. 2 is a schematic view of the connection between a slide block and a longitudinal rail according to the present invention.
In the figure: 1. the frame type vehicle comprises a frame type vehicle body, 2 rollers, 3 platforms, 4 screws, 5 nuts, 6 longitudinal guide rails, 7 transverse guide rails, 8 sliders, 9 grooves and 10 connecting pieces.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the trolley for online replacement of the cooling fan of the dry-type transformer provided by the invention is mainly composed of two parts, namely a lower-layer trolley body and an upper-layer platform.
The lower floor of dolly is frame-type automobile body 1, and four gyro wheels 2 are installed to the bottom of frame-type automobile body 1, and four gyro wheels 2 tops are passed through the fix with screw in the bottom of frame-type automobile body 1, and every gyro wheel 2 all takes brake equipment certainly, and after removing the dolly suitable position, the locking brake plays fixed effect.
The upper-layer platform of the trolley is a liftable platform 3, the lower part of the platform 3 is connected with the lower-part trolley body 1 through four screw rods 4, and the upper ends of the screw rods 4 are fixed on the platform 3 through threads; the lower end of the screw rod 4 passes through the upper plane of the lower vehicle body 1 through a hole with a diameter slightly larger than that of the screw rod 4, and a round nut 5 is assembled between the upper platform of each screw rod 4 and the lower vehicle body; by rotating the round nut 5, the extension length of each screw rod 4 from the lower vehicle body 1 can be adjusted, so that the platform 3 can ascend or descend, and the height of the whole online replacement trolley can be adjusted within a certain range.
Two longitudinal guide rails 6 with the same specification as the lower part of the cooling fan in the dry-type transformer box are longitudinally arranged in parallel on the upper surface of the platform 3 of the upper platform. Two transverse guide rails 7 are arranged below the longitudinal guide rail 6 in parallel, and the transverse guide rails 7 are vertical to the longitudinal guide rail 6; the transverse guide rail 7 is embedded into the platform 3, the upper plane of the transverse guide rail 7 is flush with the surface of the platform 3, and the transverse guide rail 7 is fixed on the platform 3 through screws; each transverse guide rail 7 is provided with two sliding blocks 8, each sliding block 8 is respectively connected with the longitudinal guide rails 6 on two sides through connecting pieces 10, and the connecting pieces 10 are fixedly connected with the longitudinal guide rails 6 through screws; the position of the longitudinal guide rail 6 can be moved by moving the sliding block 8, and the longitudinal guide rail 6 is driven to move along the transverse guide rail 7 by moving the sliding block 8, so that the distance between the two longitudinal guide rails 6 is adjusted; each slide block 8 has a locking function and plays a role in fixing the position of the longitudinal guide rail 6.
One end of the longitudinal guide rail 6 extends out of the surface of the platform 3, the extending length is about 10cm, a groove 9 with the same width as the guide rail 6 is welded at the end, the length of the groove 9 is about 5cm, and the left side, the right side and the lower side of the outer end of the groove 9 are outer oblique openings. The other end of the longitudinal guide rail 6 also extends out of the surface of the upper platform, and the length of the extension is about 10 cm. Comprises a longitudinal guide rail 6 extending out of the upper platform 3, and the total length of each trolley is controlled within 1.5 m.
As shown in fig. 1, the method for replacing a cooling fan of a dry-type transformer on line provided by the invention comprises the following steps:
In the operation process of the dry-type transformer, when a cooling fan of the dry-type transformer breaks down and needs to be replaced, a corresponding access window on a dry-type transformer box body is opened, the trolley is moved, one end of the longitudinal guide rail 6 with the groove 9 extends into the dry-type transformer box body through the access window, and the longitudinal guide rail 6 is close to a guide rail arranged at the lower part of the cooling fan.
Firstly, four adjusting screws 4 below a platform 3 of the trolley are adjusted by rotating a round nut 5, so that the height of a longitudinal guide rail 6 is consistent with the height of a guide rail at the lower part of a cooling fan of the dry-type transformer; and then the slide block 8 is moved to respectively adjust the positions of the two longitudinal guide rails 6, so that the two longitudinal guide rails are respectively aligned with the two guide rails in the dry-type transformer box body.
The trolley is pushed to enable the guide rail in the dry type transformer box body to enter the groove 9 until the guide rail in the dry type transformer box body is completely contacted with the longitudinal guide rail 6 on the trolley, the position of the longitudinal guide rail 6 is fixed by the locking sliding block 8, the brake of the roller 2 on the lower portion of the trolley is replaced on line, and the whole position of the trolley is fixed.
At the moment, the power line of the corresponding dry-type transformer cooling fan is disassembled, the cooling fan is pulled out along the guide rail inside the dry-type transformer box body, and the dry-type transformer cooling fan directly enters the longitudinal guide rail 6 on the trolley after the sliding block at the bottom of the cooling fan comes out from the guide rail inside the transformer box body; when the cooling fan completely enters the longitudinal guide rail 6 on the trolley, the trolley is pulled out, and then the cooling fan can be replaced.
If the length of the dry-type transformer cooling fan is larger than that of a single trolley, a plurality of trolleys can be adopted, one end of the longitudinal guide rail 6 on one trolley, which is connected with the groove 9, is connected with one end of the longitudinal guide rail 6 on the other trolley, which is not connected with the groove, and the end of the longitudinal guide rail 6, which is not connected with the groove, is inserted into the groove 9 of the longitudinal guide rail 6; thus, a plurality of trolleys are connected in series, and the overall length is prolonged.
And 5, replacing the cooling fan on the longitudinal guide rail 6 with a new cooling fan, pushing the new cooling fan into the dry-type transformer box along the longitudinal guide rail 6, and completing the online replacement of the cooling fan
After the cooling fan is replaced, the longitudinal guide rail 6 is butted with the guide rail in the dry type transformer box body again, a new cooling fan is pushed into the guide rail in the dry type transformer box body along the longitudinal guide rail 6, the trolley is pulled out after the cooling fan is in place, the power supply wiring of the cooling fan is recovered, the maintenance window is closed, and the replacement of the cooling fan is completed.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (13)
1. The utility model provides a dolly that is used for online change of dry-type transformer cooling blower which characterized in that: the trolley comprises a lower-layer trolley body and an upper-layer platform, wherein the lower-layer trolley body comprises a frame type trolley body (1) and rollers (2) arranged at the bottom of the frame type trolley body (1), the upper-layer platform comprises a platform (3) capable of lifting relative to the frame type trolley body (1), a longitudinal guide rail (6) and a transverse guide rail (7), and the longitudinal guide rail (6) and the transverse guide rail (7) are perpendicular to the longitudinal guide rail (6) and are arranged on the platform (3).
2. The trolley for the online replacement of the cooling fan of the dry-type transformer as claimed in claim 1, wherein: a screw (4) and a nut (5) which can enable the platform (3) to ascend and descend are arranged between the lower portion of the platform (3) and the upper portion of the frame type vehicle body (1), and the nut (5) which is rotatably connected with the screw is sleeved outside the screw (4).
3. The trolley for the online replacement of the cooling fan of the dry-type transformer as claimed in claim 2, wherein: the upper end of the screw rod (4) is fixed on the platform (3), and the lower end of the screw rod (4) is inserted into the frame type vehicle body (1).
4. The trolley for the online replacement of the cooling fan of the dry-type transformer as claimed in claim 3, wherein: the transverse guide rail (7) is embedded in the platform (3), and a sliding block (8) for transversely moving the longitudinal guide rail (6) is arranged on the transverse guide rail (7).
5. The trolley for the online replacement of the cooling fan of the dry-type transformer as claimed in claim 4, wherein: the sliding block (8) is connected with the longitudinal guide rail (6) through a connecting piece (10).
6. The trolley for the online replacement of the cooling fan of the dry-type transformer as claimed in claim 5, wherein: the two ends of the longitudinal guide rail (6) extend out of the surface of the platform (3), and one end of the longitudinal guide rail (6) is provided with a groove (9).
7. The trolley for the online replacement of the cooling fan of the dry-type transformer as claimed in claim 6, wherein: the trough (9) has an external bevel which can be connected to the end of the longitudinal rail (6) of another trolley.
8. A method for replacing a dry-type transformer cooling fan on line by using the trolley as claimed in claim 7, which is characterized in that: the method comprises the following steps:
step 1, opening an access window of the dry-type transformer, and extending a longitudinal guide rail (6) into a dry-type transformer box body;
step 2, adjusting the upper platform (3) to enable the height of the longitudinal guide rail (6) to be consistent with that of the guide rail at the lower part of the dry-type transformer cooling fan, and aligning the longitudinal guide rail (6) with the guide rail in the dry-type transformer box body;
step 3, pushing the trolley to enable the guide rail in the dry type transformer box body to enter a groove (9) at the end part of the longitudinal guide rail (6) and be in complete contact with the longitudinal guide rail (6);
step 4, pulling out the cooling fan of the dry-type transformer, and enabling the cooling fan to enter a longitudinal guide rail (6) on the trolley; the dragging trolley drags the longitudinal guide rail (6) out of the transformer box body;
and 5, replacing the cooling fan on the longitudinal guide rail (6) with a new cooling fan, and pushing the new cooling fan into the dry-type transformer box body along the longitudinal guide rail (6) to complete the on-line replacement of the cooling fan.
9. An online replacement method for a dry-type transformer cooling fan according to claim 8, characterized in that: in the step 1, one end of a longitudinal guide rail (6) with a groove (9) extends into the dry-type transformer box body through the access window, and the longitudinal guide rail (6) is close to a guide rail arranged at the lower part of the cooling fan.
10. A dry-type transformer cooling fan on-line replacement method according to claim 9, characterized in that: in the step 2, the adjusting screw (4) below the platform (3) of the trolley is adjusted by rotating the round nut (5), so that the height of the longitudinal guide rail (6) is consistent with that of the guide rail at the lower part of the cooling fan; the movable sliding block (8) adjusts the longitudinal guide rail (6) to be aligned with the guide rail in the dry type transformer box body.
11. A dry-type transformer cooling fan on-line replacement method according to claim 10, characterized in that: in the step 3, after the guide rail in the dry type transformer box body enters the groove (9) and is completely contacted with the longitudinal guide rail (6), the sliding block (8) is locked, so that the longitudinal guide rail (6) is fixed; the brake of the roller (2) is pressed down, so that the trolley is fixed.
12. A dry-type transformer cooling fan on-line replacement method according to claim 11, characterized in that: when the length of the dry-type transformer cooling fan exceeds the length of a single trolley, the dry-type transformer cooling fan is replaced on line after a plurality of trolleys are connected in series.
13. A dry-type transformer cooling fan on-line replacement method according to claim 12, characterized in that: the trolley series connection steps are as follows: the end of the longitudinal guide rail (6) on one trolley, which is not connected with the groove, is inserted into the groove (9) of the longitudinal guide rail (6) on the other trolley, so that the trolleys are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010594625.0A CN111689428A (en) | 2020-06-28 | 2020-06-28 | Trolley for online replacement of cooling fan of dry-type transformer and replacement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010594625.0A CN111689428A (en) | 2020-06-28 | 2020-06-28 | Trolley for online replacement of cooling fan of dry-type transformer and replacement method |
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| Publication Number | Publication Date |
|---|---|
| CN111689428A true CN111689428A (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010594625.0A Pending CN111689428A (en) | 2020-06-28 | 2020-06-28 | Trolley for online replacement of cooling fan of dry-type transformer and replacement method |
Country Status (1)
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| CN (1) | CN111689428A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204771456U (en) * | 2015-06-04 | 2015-11-18 | 上海梅山钢铁股份有限公司 | Dolly device is changed to cast heater inner core |
| CN204824008U (en) * | 2015-08-21 | 2015-12-02 | 山东山姆自动化设备有限公司 | Dolly that lifts that is suitable for assembly line installation |
| CN108501899A (en) * | 2018-04-08 | 2018-09-07 | 王伟波 | A kind of new energy car battery case quick replacement device |
| CN209553192U (en) * | 2019-03-04 | 2019-10-29 | 唐山百川智能机器股份有限公司 | Locomotive main transformer dismounts lifting device plane translation rotating mechanism |
| CN210064261U (en) * | 2019-06-26 | 2020-02-14 | 重庆前卫科技集团有限公司 | Battery pack towing device |
-
2020
- 2020-06-28 CN CN202010594625.0A patent/CN111689428A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204771456U (en) * | 2015-06-04 | 2015-11-18 | 上海梅山钢铁股份有限公司 | Dolly device is changed to cast heater inner core |
| CN204824008U (en) * | 2015-08-21 | 2015-12-02 | 山东山姆自动化设备有限公司 | Dolly that lifts that is suitable for assembly line installation |
| CN108501899A (en) * | 2018-04-08 | 2018-09-07 | 王伟波 | A kind of new energy car battery case quick replacement device |
| CN209553192U (en) * | 2019-03-04 | 2019-10-29 | 唐山百川智能机器股份有限公司 | Locomotive main transformer dismounts lifting device plane translation rotating mechanism |
| CN210064261U (en) * | 2019-06-26 | 2020-02-14 | 重庆前卫科技集团有限公司 | Battery pack towing device |
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Application publication date: 20200922 |