CN111614005A - Disassembling and assembling method for distribution transformer - Google Patents

Disassembling and assembling method for distribution transformer Download PDF

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Publication number
CN111614005A
CN111614005A CN202010485177.0A CN202010485177A CN111614005A CN 111614005 A CN111614005 A CN 111614005A CN 202010485177 A CN202010485177 A CN 202010485177A CN 111614005 A CN111614005 A CN 111614005A
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CN
China
Prior art keywords
distribution transformer
lifting device
cross arm
hoisting frame
installing
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Granted
Application number
CN202010485177.0A
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Chinese (zh)
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CN111614005B (en
Inventor
陈振
叶克勤
胥晶
徐文辉
钦伟勋
陈昕航
王振
徐勇生
沈晓斌
唐盟
周峰
芮煜东
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Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Application filed by Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority to CN202010485177.0A priority Critical patent/CN111614005B/en
Publication of CN111614005A publication Critical patent/CN111614005A/en
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Publication of CN111614005B publication Critical patent/CN111614005B/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00Capstans, winches or hoists
    • B66D2700/01Winches, capstans or pivots
    • B66D2700/0183Details, e.g. winch drums, cooling, bearings, mounting, base structures, cable guiding or attachment of the cable to the drum

Abstract

The invention relates to the technical field of distribution transformer installation, in particular to a method for disassembling and assembling a distribution transformer. The disassembling and assembling method of the distribution transformer comprises the following steps: mounting the hoisting frame on the electric pole so that the hoisting frame is positioned above the cross arm of the distribution transformer; installing a lifting device on a hoisting frame; installing the distribution transformer on a lifting device, and lifting the distribution transformer above a cross arm of the distribution transformer by the lifting device; and taking down the distribution transformer from the lifting device and installing the distribution transformer on a hoisting frame. The dismounting method of the distribution transformer can be suitable for outdoor environments with poor ground environments, and is less restricted by terrain environments. The dismounting method can realize the timely maintenance of the damaged distribution transformer, ensure the timely recovery of a paralyzed power system and avoid great economic loss and social loss. The disassembly and assembly method has the advantages of few assembly procedures, small construction area, no damage to peripheral plants, vegetation and the like, and contribution to the protection of natural ecological environment.

Description

Disassembling and assembling method for distribution transformer
Technical Field
The invention relates to the technical field of distribution transformer installation, in particular to a method for disassembling and assembling a distribution transformer.
Background
The distribution transformer is mainly disassembled and assembled by three modes of fork lift, crane lifting and derrick lifting. The forklift is pushed to be disassembled and assembled only in a factory area with flat ground, and is not suitable for being applied to outdoor environments with poor ground environments. Although the crane is fast to lift, the dismounting mode of the crane is limited by traffic conditions, terrain environment and the like, for example, the crane is not easy to enter a mountain area with poor ground environment; when the road is closed by rain or snow, the crane cannot enter the designated area to install the distribution transformer. The holding pole is arranged on the ground around the electric pole, the total assembly weight of the supporting machines of the holding pole exceeds 400Kg, the time required for installing the distribution transformer by the supporting machines of the holding pole is more than 108 minutes, the carrying and installing time of the supporting machines of the holding pole is long, the assembling procedures are multiple, the construction surface is too large, and peripheral plants, vegetation and the like are easy to damage.
Therefore, the traditional installation method of the distribution transformer is greatly influenced by landforms and environments, has a small applicable construction environment range, high construction cost, long construction time and high manpower consumption, and seriously restricts the construction progress of power distribution network construction and the development of construction enterprises.
Accordingly, a method for disassembling and assembling a distribution transformer is desired to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for disassembling and assembling a distribution transformer, which is applicable to wide construction environment range, low in construction cost, short in construction time and low in labor consumption, and can improve the construction progress of power distribution network construction and the development of construction enterprises.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for disassembling and assembling a distribution transformer comprises the following steps:
step 1: mounting a hoisting frame on an electric pole so that the hoisting frame is positioned above a cross arm of a distribution transformer;
step 2: installing a lifting device on the hoisting frame;
and step 3: installing a distribution transformer on the lifting device, wherein the lifting device lifts the distribution transformer above the distribution transformer cross arm;
and 4, step 4: and taking down the distribution transformer from the lifting device and installing the distribution transformer on the hoisting frame.
Preferably, the hoisting frame comprises a first hoop, a support rod, a telescopic rod and a second hoop, the first hoop is rotatably connected with one end of the support rod, the other end of the support rod is movably connected with one end of the telescopic rod, and the other end of the telescopic rod is rotatably connected with the second hoop.
Preferably, the step 1 of installing the hoisting frame on the electric pole comprises the following steps:
step 11: installing the first hoop and the second hoop on the electric pole so that the first hoop and the second hoop are arranged in a vertical direction; and
step 12: and adjusting the length of the telescopic rod to enable the supporting rod to be placed along the horizontal direction.
Preferably, the second hoop is installed above the first hoop.
Preferably, the step 3 of mounting the distribution transformer on the lifting device comprises:
step 31: installing a wire rope on the distribution transformer; and
step 32: and installing the steel wire rope on the lifting device.
Preferably, the lifting device in step 3 lifts the distribution transformer above the distribution transformer cross arm:
step 33: and raising the distribution transformer above the cross arm of the distribution transformer at a constant speed.
Preferably, step 33 is followed by:
step 34: and applying a force in the horizontal direction to the distribution transformer so as to enable the distribution transformer to avoid the distribution transformer cross arm in the vertical direction.
Preferably, an adjusting chain is arranged on the distribution transformer, and the adjusting chain is pulled so that the distribution transformer avoids the distribution transformer cross arm along the vertical direction.
Preferably, after the lifting device in step 3 lifts the distribution transformer above the distribution transformer cross arm, the method further includes:
step 3': and aligning the distribution transformer with the distribution transformer cross arm along the vertical direction so as to enable the distribution transformer to be positioned right above the distribution transformer cross arm.
Preferably, the step 4 is followed by:
and 5: and after the use of the distribution transformer is finished, taking down the distribution transformer from the distribution transformer cross arm.
Preferably, the step 5 comprises:
step 51: mounting a hoisting frame on an electric pole so that the hoisting frame is positioned above the cross arm of the distribution transformer;
step 52: installing a lifting device on the hoisting frame;
step 53: installing the distribution transformer on the lifting device, the lifting device lowering the distribution transformer to the ground;
step 54: and taking the distribution transformer off the lifting device.
Preferably, the step 53 of lowering the distribution transformer to the ground by the lifting device is:
step 531: and descending the distribution transformer to the ground at a constant speed.
Preferably, after the step 53, the method further includes:
step 53': and applying a force in the horizontal direction to the distribution transformer so as to enable the distribution transformer to avoid the distribution transformer cross arm in the vertical direction.
Preferably, the lifting device is an electric hoist.
The invention has the beneficial effects that:
according to the dismounting method for the distribution transformer, the lifting frame is arranged on the electric pole, the distribution transformer is arranged on the lifting frame by an operator after the lifting device on the lifting frame lifts the distribution transformer above the cross arm of the distribution transformer, the dismounting method is not influenced by the ground environment, the normal installation of the distribution transformer is not influenced even if the ground environment of a construction site is poor, and compared with a mounting mode pushed by a forklift, the dismounting method is suitable for the outdoor environment with poor ground environment and is less restricted by the terrain environment.
In addition, the method only needs to install the hoisting frame on the electric pole, the lifting device is installed on the hoisting frame, the lifting device lifts the distribution transformer above the cross arm of the distribution transformer, an operator installs the distribution transformer in the cross arm of the distribution transformer, large-scale equipment such as a crane and the like is not needed in the whole process, the operator only needs to transport the hoisting frame and the lifting device with small size to a construction site for corresponding operation, and normal disassembly and assembly of the distribution transformer cannot be influenced even if the ground environment of the construction site is poor or a road is sealed by rain and snow, so that compared with an installation method of hoisting by a crane, the disassembly and assembly method provided by the invention is less influenced by the landform and the environment. Particularly, in the weather of snowstorm, the snowstorm causes great damage to the distribution transformer, so that the whole power system is paralyzed, great influence is caused on the life of people and the operation of enterprises, and the paralysis of the function of the whole city is caused. However, the construction is carried out by the snowstorm, so that large equipment such as a crane cannot enter a construction site, constructors cannot timely maintain a distribution transformer, normal operation of a power system cannot be timely recovered, and great economic loss and social loss are caused to the society. The hoisting frame and the lifting device applied in the method have small volume and weight, and can be transported to a construction site through manual carrying even under the condition of snowstorm and road sealing. By applying the dismounting method provided by the invention, the normal dismounting of the distribution transformer can not be influenced due to the fact that the road is closed by the snowstorm, the damaged distribution transformer can be maintained in time, the power system which is paralyzed can be recovered in time, the normal life of people, the normal operation of enterprises and the normal operation of cities can be ensured, and the larger economic loss and social loss can be avoided.
In addition, the dismounting method only needs to install the hoisting frame on the electric pole, the lifting device is installed on the hoisting frame, the lifting device lifts the distribution transformer above the cross arm of the distribution transformer, an operator installs the distribution transformer in the cross arm of the distribution transformer, and the whole process does not need to use holding pole supporting machines with larger volume.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hoisting frame, a distribution transformer, an electric pole and a distribution transformer cross arm provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a hoisting frame, a distribution transformer and a lifting device provided in the embodiment of the present invention;
fig. 3 is a schematic structural view of a second hoop and a first telescopic rod provided in the embodiment of the present invention;
FIG. 4 is a cross-sectional view of a telescoping pole provided in accordance with an embodiment of the present invention;
fig. 5 is a schematic structural view of a second hoop and a second telescopic rod provided in the embodiment of the present invention.
The figures are labeled as follows:
1-hoisting frame; 2-an electric pole; 3-distribution transformer cross arm; 4-a lifting device; 5-a distribution transformer; 6-steel wire rope; 7-adjusting the chain;
11-a first hoop; 12-a support bar; 13-a telescopic rod; 14-a second hoop; 41-hanging hooks;
121-a second suspension loop; 131-a connector; 132-a locking element; 133-a sleeve; 134-adjusting rod; 135-a first suspension loop; 136-bolt; 137-nut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The method for disassembling and assembling the distribution transformer provided by the embodiment comprises the following steps:
step 1: mounting the hoisting frame 1 on the electric pole 2 so that the hoisting frame 1 is positioned above the cross arm 3 of the distribution transformer;
step 2: installing a lifting device 4 on the hoisting frame 1;
and step 3: installing a distribution transformer 5 on a lifting device 4, and lifting the distribution transformer 5 above a distribution transformer cross arm 3 by the lifting device 4;
and 4, step 4: the distribution transformer 5 is removed from the lifting device 4 and mounted on the hoisting frame 1.
The distribution transformer's of this embodiment dismouting method will hoist and mount frame 1 and install on pole 2, hoist and mount frame 1 last elevating gear 4 promote distribution transformer 5 to distribution transformer cross arm 3's top after, the operator installs distribution transformer 5 on hoist and mount frame 1 again, this dismouting method can not receive the influence of ground environment, even if the ground environment of construction site is relatively poor, can not influence distribution transformer 5's normal installation yet, this dismouting method compares with the dismouting mode that fork truck promoted, can be applicable to the relatively poor outdoor environment of ground environment, it is little to receive the restriction of topographic environment.
In addition, the method only needs to install the hoisting frame 1 on the electric pole 2, install the lifting device 4 on the hoisting frame 1, and install the distribution transformer 5 in the distribution transformer cross arm 3 after the lifting device 4 lifts the distribution transformer 5 above the distribution transformer cross arm 3. In the whole process, large-scale equipment such as a crane is not needed, and an operator only needs to transport the hoisting frame 1 with small volume and the lifting device 4 to a construction site for corresponding operation. Even if the ground environment of the construction site is poor or the road is closed by rain or snow, the normal disassembly and assembly of the distribution transformer 5 cannot be influenced, so that the disassembly and assembly method provided by the embodiment is less influenced by the landform and the environment compared with the disassembly and assembly method for hoisting by a crane. Particularly, in the weather of snowstorm, the distribution transformer 5 is greatly damaged by the snowstorm, so that the whole power system is paralyzed, the life of people and the operation of enterprises are greatly influenced, and the whole urban function is paralyzed. However, the construction is carried out by the snowstorm, so that large equipment such as a crane cannot enter a construction site, a constructor cannot timely maintain the distribution transformer 5, and the constructor cannot timely recover the normal operation of the power system, thereby causing great economic loss and social loss. The hoisting frame 1 and the lifting device 4 applied in the method are small in size and weight, and can be conveyed to a construction site through manual carrying even under the condition of sealing a road with snow storm.
In addition, the dismounting method of the embodiment only needs to install the hoisting frame 1 on the electric pole 2, the lifting device 4 is installed on the hoisting frame 1, after the lifting device 4 lifts the distribution transformer 5 above the distribution transformer cross arm 3, an operator installs the distribution transformer 5 in the distribution transformer cross arm 3, and the whole process does not need to use a large-size holding pole matching machine tool.
Specifically, as shown in fig. 1 and fig. 2, the hoisting frame 1 applied in this embodiment includes a first hoop 11, a support rod 12, a telescopic rod 13 and a second hoop 14, the first hoop 11 is rotatably connected to one end of the support rod 12, the other end of the support rod 12 is movably connected to one end of the telescopic rod 13, and the other end of the telescopic rod 13 is rotatably connected to the second hoop 14. This hoist and mount frame 1 is 48Kg only, compares and holds pole supporting machines and tools assembly that total assembly weight exceeds 400Kg, and the hoist and mount frame 1 of this embodiment's simple structure, the equipment process is few, small, light in weight and construction area are little, uses this hoist and mount frame 1, only needs 20 minutes just can install distribution transformer 5 on distribution transformer cross arm 3, and this distribution transformer's dismouting method compares with the dismouting method of holding pole mode of lifting by crane, and the required time is short, can effectively improve distribution transformer 5's installation effectiveness. Through first staple bolt 11 and second staple bolt 14 respectively with the pole 2 cooperation, can improve the fixed effect of hoisting frame 1 and pole 2, can guarantee the stable connection of hoisting frame 1 and pole 2. As shown in fig. 2, the telescopic rod 13 is provided with a first hanging ring 135, the support rod 12 is provided with a second hanging ring 121, and the first hanging ring 135 is connected with the second hanging ring 121 in a hanging manner, so that the support rod 12 is movably connected with the telescopic rod 13.
For convenience of explaining step 1, as shown in fig. 1 and 2, the installation of the hoisting frame 1 on the electric pole 2 in step 1 is as follows:
step 11: the first hoop 11 and the second hoop 14 are installed on the electric pole 2, so that the first hoop 11 and the second hoop 14 are arranged in the vertical direction; and
step 12: the length of the telescopic bar 13 is adjusted so that the support bar 12 is placed in a horizontal direction.
Through step 11 and step 12, can be so that pole 2, telescopic link 13 and bracing piece 12 form the triangle-shaped structure, because the triangle-shaped structure has firm, withstand voltage's characteristics, so pole 2, telescopic link 13 and bracing piece 12 form the triangle-shaped structure and can realize the better supporting role to elevating gear 4 and distribution transformer 5, can prevent that distribution transformer 5 from pulling out hoist and mount frame 1 in the in-process that goes up and down, guarantee that distribution transformer 5 carries out the action of going up and down steadily.
In addition, as shown in fig. 1, the second hoop 14 is installed above the first hoop 11, and when the distribution transformer 5 is installed on the support rod 12, the telescopic rod 13 can pull the support rod 12, so that the support rod 12 can be better placed along the horizontal direction, and the electric pole 2, the telescopic rod 13 and the support rod 12 can keep forming a stable triangular structure without deformation.
In order to adjust the length of the telescopic rod 13, as shown in fig. 3 and 4, the telescopic rod 13 includes a connecting member 131, a locking member 132, a sleeve 133 and an adjusting rod 134, wherein a mounting hole communicated with the inside of the sleeve 133 is formed at the bottom end of the sleeve 133, the connecting member 131 includes a connecting block and a screw rod disposed at one side of the connecting block, the connecting block is rotatably connected with the second hoop 14, the screw rod penetrates into the sleeve 133 from the bottom of the sleeve 133, and the screw rod is connected with the locking member 132, so that the relative positions of the connecting member 131 and the sleeve 133 along the axial direction are fixed, and the connecting member 131 can rotate relative to the sleeve 133. The inner wall of the sleeve 133 is provided with threads, the adjusting rod 134 is arranged in the sleeve 133 in a penetrating manner and screwed with the threads, and the relative position of the sleeve 133 and the adjusting rod 134 along the axial direction can be adjusted by screwing the sleeve 133, so that the length of the telescopic rod 13 can be adjusted. By applying the telescopic rod 13, an operator can adjust the length of the telescopic rod 13 through simple screwing action, so that the length of the telescopic rod 13 can be adjusted simply and conveniently. In addition, the telescopic rod 13 can be used in a narrow installation space, and the operator can adjust the length of the telescopic rod 13 by simple screwing action without being limited by the installation space. In addition, the above-mentioned telescopic link 13 structure can realize the continuous regulation of the length of telescopic link 13 to satisfy the demand to different telescopic link 13 lengths.
As shown in fig. 5, the embodiment further provides a telescopic rod 13 with another structure, the telescopic rod 13 includes a connecting member 131, a locking member 132, a sleeve 133, an adjusting rod 134, a first hanging ring 135, a bolt 136 and a nut 137, wherein a mounting hole communicated with the inside of the sleeve 133 is formed at the bottom end of the sleeve 133, the connecting member 131 includes a connecting block and a screw rod disposed at one side of the connecting block, the connecting block is rotatably connected with the second hoop 14, the screw rod penetrates into the sleeve 133 from the bottom of the sleeve 133, and the screw rod is connected with the locking member 132, so that the relative positions of the connecting member 131 and the sleeve 133 along the axial direction are fixed, and the connecting member 131 can rotate relative to the sleeve 133. A plurality of first mounting holes are formed in the periphery of the sleeve 133 along the axis direction, a second mounting hole is formed in the adjusting rod 134, the bolt 136 sequentially penetrates through the first mounting hole and the second mounting hole on one side and the first mounting hole on the other side, and the bolt 136 extends out of the screw portion of the sleeve 133 and is screwed with the nut 137, so that the sleeve 133 and the adjusting rod 134 are fixed along the axis direction. The length of the telescopic rod 13 can be adjusted by arranging the second mounting hole opposite to the different first mounting hole and fixing the sleeve 133 and the adjusting rod 134 by the bolt 136 and the nut 137.
As shown in fig. 2, the lifting device 4 of the present embodiment is an electric hoist, which has a small size, a compact structure, a light weight, a simple operation, and a convenient use, and can provide sufficient force to lift the distribution transformer 5.
For convenience of explaining step 3, the step 3 of installing the distribution transformer 5 on the lifting device 4 specifically includes:
step 31: installing a steel wire rope 6 on a distribution transformer 5; and
step 32: the wire rope 6 is mounted on the lifting device 4.
Since the outside of the distribution transformer 5 has no structure to be fitted with the hook of the electric block, it is difficult to mount the distribution transformer 5 on the hook of the electric block. Through installing wire rope 6 on distribution transformer 5, install wire rope 6 on electric block's couple again, can realize installing distribution transformer 5 the effect at electric block fast conveniently. In addition, the outer periphery of the distribution transformer 5 is covered with the wire rope 6, so that the internal structure of the distribution transformer 5 can be prevented from falling out.
In order to further optimize step 3, the lifting device 4 in step 3 lifts the distribution transformer 5 above the distribution transformer cross arm 3:
step 33: and lifting the distribution transformer 5 to the upper part of the distribution transformer cross arm 3 at a constant speed.
Through distribution transformer 5's uniform velocity motion, can realize distribution transformer 5 at the steady motion of lift in-process, can avoid distribution transformer 5 to take place to vibrate at the lift in-process, can avoid 5 inside spare parts of distribution transformer to take place to collide with and the damage or the dislocation that lead to, guarantee distribution transformer 5's normal use, improve distribution transformer 5's life.
To further optimize step 3, step 33 is followed by:
step 34: a horizontal force is applied to the distribution transformer 5 so that the distribution transformer 5 is moved away from the distribution transformer cross arm 3 in the vertical direction.
Because distribution transformer 5 can take place the condition of colliding with distribution transformer cross arm 3 at the in-process of going up and down, because distribution transformer 5 and distribution transformer cross arm 3 are the rigidity piece, distribution transformer 5 can lead to distribution transformer 5 to take place to damage with the more serious colliding with of distribution transformer cross arm 3, influence distribution transformer 5's life, still can make distribution transformer cross arm 3 take off from pole 2 pine, so that distribution transformer cross arm 3 can't carry out effectual support to distribution transformer 5. In order to solve the above problems, a horizontal force is applied to the distribution transformer 5, so that the distribution transformer 5 avoids the distribution transformer cross arm 3 along a vertical direction, the distribution transformer 5 can be effectively prevented from colliding with the distribution transformer cross arm 3, the service life of the distribution transformer 5 is ensured, and the distribution transformer cross arm 3 can effectively support the distribution transformer 5. To implement step 34, as shown in fig. 1 and 2, the adjusting chain 7 is provided on the distribution transformer 5, and the operator pulls the adjusting chain 7 to horizontally displace the distribution transformer 5 so that the distribution transformer 5 is vertically retracted from the distribution transformer cross arm 3.
In order to achieve the effect of accurately installing the distribution transformer 5 on the distribution transformer cross arm 3, the lifting device 4 further includes a step 3 'after lifting the distribution transformer 5 above the distribution transformer cross arm 3, and the step 3' is to align the distribution transformer 5 and the distribution transformer cross arm 3 along the vertical direction so that the distribution transformer 5 is located right above the distribution transformer cross arm 3.
In addition, step 4 is followed by:
and 5: after the use of the distribution transformer 5 is completed, the distribution transformer 5 is removed from the distribution transformer cross arm 3.
When distribution transformer 5 takes place to damage and need the maintenance, need take off distribution transformer 5 from distribution transformer cross arm 3, can realize the effect to the quick maintenance of distribution transformer 5 of damage through application step 5.
For convenience of explanation of step 5, step 5 includes:
step 51: mounting the hoisting frame 1 on the electric pole 2 so that the hoisting frame 1 is positioned above the cross arm 3 of the distribution transformer;
step 52: installing a lifting device 4 on the hoisting frame 1;
step 53: installing a distribution transformer 5 on a lifting device 4, and lowering the distribution transformer 5 to the ground by the lifting device 4;
step 54: the distribution transformer 5 is removed from the lifting device 4.
According to the dismounting and mounting method of the distribution transformer, the hoisting frame 1 is mounted on the electric pole 2, and the lifting device 4 on the hoisting frame 1 descends the distribution transformer 5 to the ground, so that the distribution transformer 5 can be maintained. The dismounting method is not influenced by the ground environment, even if the ground environment of a construction site is poor, dismounting of the distribution transformer 5 is not influenced, compared with a dismounting mode of forklift lifting, the dismounting method can be suitable for the outdoor environment with poor ground environment, and is less restricted by the terrain environment.
In addition, the method only needs to install the hoisting frame 1 on the electric pole 2, the lifting device 4 is installed on the hoisting frame 1, and the lifting device 4 descends the distribution transformer 5 to the ground, so that the distribution transformer 5 can be maintained. The hoisting frame 1 and the lifting device 4 with small size are only required to be transported to a construction site by an operator for corresponding operation without using large equipment such as a crane in the whole process, and normal disassembly and assembly of the distribution transformer cannot be influenced even if the ground environment of the construction site is poor or a road is sealed by rain and snow, so that compared with a disassembly method for hoisting by a crane, the disassembly and assembly method provided by the embodiment is less influenced by landform and environment. Particularly, in the weather of snowstorm, the distribution transformer 5 is greatly damaged by the snowstorm, so that the whole power system is paralyzed, the life of people and the operation of enterprises are greatly influenced, and the whole urban function is paralyzed. However, the construction is carried out by the snowstorm, so that large equipment such as a crane cannot enter a construction site, constructors cannot timely maintain the distribution transformer 5, normal operation of a power system cannot be timely recovered, and great economic loss and social loss are caused to the society. The hoisting frame 1 and the lifting device 4 applied in the method are small in size and weight, and can be conveyed to a construction site through manual carrying even under the condition of sealing a road with snow storm.
In addition, the dismounting method of the embodiment only needs to install the hoisting frame 1 on the electric pole 2, the lifting device 4 is installed on the hoisting frame 1, and the lifting device 4 descends the distribution transformer 5 to the ground, so that the distribution transformer 5 can be maintained. The hoisting frame 1 and the lifting device 4 applied in the method have small volume and weight and simple structure, so the hoisting frame 1 and the lifting device 4 are short in time consumption for carrying and installing, few in assembling procedures and small in construction area, peripheral plants, vegetation and the like cannot be damaged, and the protection of the natural ecological environment is facilitated.
To further optimize step 53, the step 53 of lowering the distribution transformer 5 to ground by the lifting device 4 is:
step 531: and lowering the distribution transformer 5 to the ground at a constant speed.
Through distribution transformer 5's uniform velocity motion, can realize distribution transformer 5 at the steady motion of the in-process that descends, can avoid distribution transformer 5 to take place to vibrate at the in-process that descends, can avoid distribution transformer 5 inside spare part to take place to collide with and the damage or the dislocation that lead to, guarantee distribution transformer 5's normal use, improve distribution transformer 5's life.
To further optimize step 5, step 53 preferably is followed by:
step 53': a horizontal force is applied to the distribution transformer 5 so that the distribution transformer 5 is moved away from the distribution transformer cross arm 3 in the vertical direction.
Because distribution transformer 5 can take place the condition of colliding with distribution transformer cross arm 3 at the in-process that descends, because distribution transformer 5 and distribution transformer cross arm 3 are the rigidity piece, distribution transformer 5 can lead to distribution transformer 5 to take place to damage with the more serious condition of colliding with of distribution transformer cross arm 3, influence distribution transformer 5's life, still can make distribution transformer cross arm 3 take off from pole 2 pine to take off, so that distribution transformer cross arm 3 can't carry out effectual support to distribution transformer 5. In order to solve the above problems, a horizontal force is applied to the distribution transformer 5, so that the distribution transformer 5 avoids the distribution transformer cross arm 3 along a vertical direction, the distribution transformer 5 can be effectively prevented from colliding with the distribution transformer cross arm 3, the service life of the distribution transformer 5 is ensured, and the distribution transformer cross arm 3 can effectively support the distribution transformer 5. To implement step 34, as shown in fig. 1 and 2, the distribution transformer 5 is provided with an adjusting chain 7, and the operator pulls the adjusting chain 7 to horizontally displace the distribution transformer 5, so that the distribution transformer 5 is vertically retracted from the distribution transformer cross arm 3.
It is noted that the foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims (14)

1. A method for disassembling and assembling a distribution transformer is characterized by comprising the following steps:
step 1: installing a hoisting frame (1) on an electric pole (2) so that the hoisting frame (1) is positioned above a cross arm (3) of a distribution transformer;
step 2: installing a lifting device (4) on the hoisting frame (1);
and step 3: installing a distribution transformer (5) on the lifting device (4), wherein the lifting device (4) lifts the distribution transformer (5) above the distribution transformer cross arm (3);
and 4, step 4: and taking down the distribution transformer (5) from the lifting device (4) and installing the distribution transformer on the hoisting frame (1).
2. The method for disassembling and assembling the distribution transformer according to claim 1, wherein the hoisting frame (1) comprises a first hoop (11), a support rod (12), a telescopic rod (13) and a second hoop (14), the first hoop (11) is rotatably connected with one end of the support rod (12), the other end of the support rod (12) is movably connected with one end of the telescopic rod (13), and the other end of the telescopic rod (13) is rotatably connected with the second hoop (14).
3. The method for dismounting a distribution transformer according to claim 2, wherein said mounting of said hoisting frame (1) on said electric pole (2) in said step 1 is:
step 11: the first hoop (11) and the second hoop (14) are installed on the electric pole (2) so that the first hoop (11) and the second hoop (14) are arranged in the vertical direction; and
step 12: the length of the telescopic rod (13) is adjusted so that the supporting rod (12) can be placed along the horizontal direction.
4. A method of dismounting a distribution transformer according to claim 3, characterized in that said second ear (14) is mounted above said first ear (11).
5. The method for dismounting a distribution transformer according to claim 1, wherein the mounting of the distribution transformer (5) on the lifting device (4) in step 3 is:
step 31: installing a steel wire rope (6) on the distribution transformer (5); and
step 32: and installing the steel wire rope (6) on the lifting device (4).
6. The method for disassembling and assembling distribution transformer according to claim 5, wherein the lifting device (4) in step 3 lifts the distribution transformer (5) above the distribution transformer cross arm (3) by:
step 33: and (3) uniformly lifting the distribution transformer (5) to the upper part of the distribution transformer cross arm (3).
7. The method of claim 6, wherein the step 33 is followed by:
step 34: and applying a force in the horizontal direction to the distribution transformer (5) so that the distribution transformer (5) avoids the distribution transformer cross arm (3) along the vertical direction.
8. Method for dismounting a distribution transformer according to claim 7, characterized in that an adjustment chain (7) is arranged on the distribution transformer (5), and the adjustment chain (7) is pulled to let the distribution transformer (5) get out of the distribution transformer cross-arm (3) in the vertical direction.
9. The method for disassembling and assembling a distribution transformer according to claim 1, wherein the step 3 further comprises, after the lifting device (4) lifts the distribution transformer (5) above the distribution transformer cross arm (3):
step 3': and aligning the distribution transformer (5) and the distribution transformer cross arm (3) along the vertical direction so that the distribution transformer (5) is positioned right above the distribution transformer cross arm (3).
10. The method of claim 1, further comprising, after step 4:
and 5: and after the distribution transformer (5) is used, the distribution transformer (5) is taken down from the distribution transformer cross arm (3).
11. The method of claim 10, wherein the step 5 comprises:
step 51: installing a hoisting frame (1) on an electric pole (2) so that the hoisting frame (1) is positioned above the distribution transformer cross arm (3);
step 52: installing a lifting device (4) on the hoisting frame (1);
step 53: -mounting the distribution transformer (5) on the lifting device (4), the lifting device (4) lowering the distribution transformer (5) to ground;
step 54: and removing the distribution transformer (5) from the lifting device (4).
12. The method for dismounting a distribution transformer according to claim 11, wherein the step 53 of lowering the distribution transformer (5) to the ground by the lifting device (4) comprises the steps of:
step 531: and descending the distribution transformer (5) to the ground at a constant speed.
13. The method of claim 11, further comprising, after step 53:
step 53': and applying a force in the horizontal direction to the distribution transformer (5) so that the distribution transformer (5) avoids the distribution transformer cross arm (3) along the vertical direction.
14. Method for dismounting a distribution transformer according to claim 1, characterized in that said lifting device (4) is an electric block.
CN202010485177.0A 2020-06-01 2020-06-01 Disassembling and assembling method for distribution transformer Active CN111614005B (en)

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CN207844973U (en) * 2018-01-31 2018-09-11 国网山东省电力公司莒南县供电公司 Simple taiwan area hoisting bracket
CN109399481A (en) * 2018-01-26 2019-03-01 国网浙江省电力公司湖州供电公司 Improved portable distribution transforming hanger
CN209024067U (en) * 2018-09-29 2019-06-25 国网浙江象山县供电有限公司 A kind of simple and easy hoisting device of for transformer

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CN2801743Y (en) * 2005-04-27 2006-08-02 山西省电力公司临汾供电分公司 Rotable transformer crane device
CN201611741U (en) * 2010-01-20 2010-10-20 重庆市电力公司江北供电局 Lifting device used for power equipment
WO2011120591A1 (en) * 2010-04-02 2011-10-06 Areva T&D Uk Limited Off-shore transformer station with exchangeable transformer assembly
CN102983517A (en) * 2012-11-23 2013-03-20 沧州供电公司 Integral installation device for transformer test bench
CN103613031A (en) * 2013-11-28 2014-03-05 国家电网公司 Simple transformer hoisting device
CN105552757A (en) * 2016-01-15 2016-05-04 国网浙江省电力公司湖州供电公司 Portable distribution transformer lifting frame
CN106938824A (en) * 2016-11-25 2017-07-11 国网河南省电力公司平顶山供电公司 A kind of boom hoisting of electric equipment maintenance
CN108002269A (en) * 2017-11-30 2018-05-08 国网山东省电力公司济南市历城区供电公司 A kind of simple pole type transformer lifting gear
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CN207844973U (en) * 2018-01-31 2018-09-11 国网山东省电力公司莒南县供电公司 Simple taiwan area hoisting bracket
CN209024067U (en) * 2018-09-29 2019-06-25 国网浙江象山县供电有限公司 A kind of simple and easy hoisting device of for transformer

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