阅读说明：本技术 一种超特高压变压器器身的整体套装方法 (Integral sleeving method for ultra-high voltage transformer body ) 是由 谈翀 谢辉 燕飞东 严子红 刘光辉 赵义香 蒋娜 于 2019-08-01 设计创作，主要内容包括：本发明涉及一种超特高压变压器器身的整体套装方法,在变压器下部的肺叶磁屏蔽处开出两个方槽放置液压缸,在液压缸的下部垫木块,选用厚钩板吊起线圈组,线圈组下落过程中在下夹件肢板上表面垫层压木垫块,液压缸上面安装液压缸帽并增加铁板,更换25mm厚的薄钩板同时液压缸受力,将层压木垫块撤掉,边降液压缸边落钩子,缓慢落下线圈组,完成变压器的整体套装。本发明通过肺叶上开槽增加液压缸位置,配合液压缸帽等工装,套装时在变压器的下部高压侧和低压侧各增加2个30t的液压缸,确保变压器的整体顺利套装；本发明使用液压缸和缓钩的工艺方法,操作简单方便,经济成本低、推广前景好。(The invention relates to an integral sleeving method of an ultra-high voltage transformer body, which is characterized in that two square grooves are formed in a lung magnetic shielding position at the lower part of a transformer for placing hydraulic cylinders, wood blocks are padded at the lower part of the hydraulic cylinders, a thick hook plate is selected for hoisting a coil group, a laminated wood cushion block is padded on the upper surface of a limb plate of a lower clamping piece in the falling process of the coil group, a hydraulic cylinder cap is installed on the hydraulic cylinders, an iron plate is added on the hydraulic cylinders, a thin hook plate with the thickness of 25mm is replaced, the hydraulic cylinders are stressed, the laminated wood cushion block is removed, hooks are dropped while the hydraulic cylinders are lowered, the coil group is slowly dropped, and. According to the invention, the positions of the hydraulic cylinders are increased by slotting the lung lobes, and the hydraulic cylinders with the length of 2 and 30t are respectively added on the high-pressure side and the low-pressure side of the lower part of the transformer during sleeving, so that the transformer is ensured to be sleeved smoothly; the process method using the hydraulic cylinder and the slow hook has the advantages of simple and convenient operation, low economic cost and good popularization prospect.)

1. A method for integrally sleeving an ultra-high voltage transformer body is characterized in that two square grooves are formed in a lung magnetic shielding position of the lower portion of a transformer for containing a hydraulic cylinder, a thick hook plate is selected for hoisting a coil group at the lower portion of the hydraulic cylinder, a laminated wood cushion block is padded on the upper surface of a limb plate of a lower clamping piece in the falling process of the coil group, a hydraulic cylinder cap is installed on the hydraulic cylinder, an iron plate is added on the hydraulic cylinder, a thin hook plate with the thickness of 25mm is replaced, the hydraulic cylinder is stressed, the laminated wood cushion block is removed, a hook is dropped while the hydraulic cylinder is lowered, the coil group is slowly dropped, and integral sleeving of the transformer is completed.

2. The integral sleeving method for the ultra-high voltage transformer body according to claim 1 is characterized by comprising the following steps:

step 1, forming two square grooves at the lung lobe magnetic shielding position at the lower part of a transformer, wherein the positions avoiding the heads of all coils are provided with the square grooves, and the size of each square groove is required to meet the requirement of placing 2 30T hydraulic cylinders;

step 2, according to the stroke of the hydraulic cylinder and the thickness of the thick hook foot plate, a wood block is padded at the lower part of the hydraulic cylinder;

step 3, selecting a thick hook plate in the integral assembly process of the transformer, and selecting four lifting hook points which are distributed in a balanced manner to lift the coil group at positions which avoid coil outgoing lines and hook grooves;

step 4, when the falling distance of the coil group is about 150mm of lower insulation, laminating a wood cushion block on the upper surface pad 3 of the limb plate of the lower clamp in layers;

step 5, installing a hydraulic cylinder cap on the hydraulic cylinder, and adding an iron plate;

step 6, replacing the thick hook plate in the step 3 with a thin hook plate with the thickness of 25mm, wherein the hook plate is the groove opening position of the lower base plate; and (4) simultaneously, the hydraulic cylinder is stressed, the laminated wood cushion block placed in the step (4) is removed, the hydraulic cylinder is lowered while the hook is lowered, the coil group is slowly lowered, and the whole transformer assembly is completed.

3. The method for integrally sleeving the body of the extra-high voltage transformer according to claim 2, wherein the slotting position in step 1 is necessarily located at the lower part of the heavier coil, and is centered in the radial direction of the coil group.

4. The method for integrally sleeving the body of the extra-high voltage transformer according to claim 3, wherein 2 30T hydraulic cylinders are respectively arranged on the high-voltage side and the low-voltage side of the lower part of the transformer in the step 1.

5. The method for integrally sleeving the body of the ultra-high voltage transformer according to any one of claims 2 to 4, wherein the laminated wood cushion block in the step 4 has a thickness of 50mm and a cushion height of 150 mm.

6. The method for integrally sleeving the body of the extra-high voltage transformer according to claim 5, wherein when the hydraulic cylinder is lowered and the hook is lowered in the step 6, 4 cylinders must be synchronously lowered.

Technical Field

The invention belongs to the technical field of transformer manufacturing and assembling, and particularly relates to an integral assembly process method of an ultra-high voltage transformer body, which can be applied to special structures of all forms of power transformers, converter transformers and the like.

Background

For an extra-high voltage transformer, the transformer body is usually large and heavy. For example, the main column of the Qinghai Xining 750kV transformer is about 35T, the lower structure of the transformer body is a lung lobe magnetic shielding structure, the lung lobe magnetic shielding structure needs to be placed in the working procedure of the transformer body, the upper part of the lung lobe magnetic shielding structure is a 50mm whole-circle end ring structure, although a 30mm thick hook groove is formed, the large hook (120 mm thick 140 wide) cannot be directly sleeved due to insufficient space, and the steps of 20mm slotting and 30mm slotting are easily cracked due to gravity, so that great potential safety hazards exist.

Disclosure of Invention

In order to solve the technical problems, the invention provides a safe and reliable integral sleeving process method of an ultra-high voltage transformer body, which is greatly helpful for products with overlarge coil group weight and insufficient space for sleeving a hook foot plate at the lower part, and can be used as a curing and sleeving process method of the transformer body with a special structure. The technical scheme adopted by the invention is as follows:

a method for integrally sleeving an ultra-high voltage transformer body is characterized in that two square grooves are formed in a lung magnetic shielding position of the lower portion of a transformer for placing a hydraulic cylinder, a thick hook plate is selected to lift a coil group, a laminated wood cushion block is padded on the upper surface of a limb plate of a lower clamping piece in the falling process of the coil group, a hydraulic cylinder cap is installed on the hydraulic cylinder, an iron plate is added on the hydraulic cylinder, a thin hook plate with the thickness of 25mm is replaced, the hydraulic cylinder is stressed, the laminated wood cushion block is removed, a hook is dropped while the hydraulic cylinder is lowered, the coil group is slowly lowered, and integral sleeving of the transformer is completed.

Preferably, the integral sleeving method specifically comprises the following steps:

step 1, forming two square grooves at the lung lobe magnetic shielding position at the lower part of a transformer, wherein the positions avoiding the heads of all coils are provided with the square grooves, and the size of each square groove is required to meet the requirement of placing 2 30T hydraulic cylinders;

step 2, according to the stroke of the hydraulic cylinder and the thickness of the thick hook foot plate, a wood block is padded at the lower part of the hydraulic cylinder;

step 3, selecting a thick hook plate in the integral assembly process of the transformer, and selecting four lifting hook points which are distributed in a balanced manner to lift the coil group at positions which avoid coil outgoing lines and hook grooves;

step 4, when the falling distance of the coil group is about 150mm of lower insulation, laminating a wood cushion block on the upper surface pad 3 of the limb plate of the lower clamp in layers;

step 5, installing a hydraulic cylinder cap on the hydraulic cylinder, and adding an iron plate;

step 6, replacing the thick hook plate in the step 3 with a thin hook plate with the thickness of 25mm, wherein the hook plate is the groove opening position of the lower base plate; and (4) simultaneously, the hydraulic cylinder is stressed, the laminated wood cushion block placed in the step (4) is removed, the hydraulic cylinder is lowered while the hook is lowered, the coil group is slowly lowered, and the whole transformer assembly is completed.

Preferably, the slotting position in step 1 must be located in the lower part of the heavier coil while being centered in the radial direction of the coil assembly.

Preferably, 2 30T hydraulic cylinders are placed on the high-voltage side and the low-voltage side of the lower part of the transformer in step 1.

Preferably, the laminated wood spacer described in step 4 should have a thickness of 50mm per layer and a height of 150 mm.

Preferably, when the hook is dropped while the hydraulic cylinder is lowered in step 6, 4 cylinders must be dropped simultaneously.

The invention has the beneficial effects that:

1) according to the invention, the positions of the hydraulic cylinders are increased by slotting the lung lobes, and the hydraulic cylinders with the length of 2 and 30t are respectively added on the high-pressure side and the low-pressure side of the lower part of the transformer in the sleeving process by matching with tools such as hydraulic cylinder caps and the like, so that the transformer is ensured to be sleeved smoothly as a whole.

2) The process method for slotting the lung lobes by using the hydraulic cylinder and the slow hook has the advantages of simple and convenient operation, low economic cost and good popularization prospect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.

FIG. 1 is a schematic diagram of a position of a square groove at a magnetic shield of a lung lobe according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of selecting a hook point location according to an embodiment of the invention;

fig. 3 is a schematic view of the position of a laminated wood spacer according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

An integral sleeving method for an ultra-high voltage transformer body comprises the following steps:

step 1, two square grooves (respectively on the high-voltage side and the low-voltage side of the lower part of the transformer) are formed at the lung lobe magnetic shielding part of the lower part of the transformer at positions avoiding the heads of the coils, and as shown in fig. 1, the position schematic diagram of the square grooves formed at the lung lobe magnetic shielding part of the embodiment of the invention is shown. The size of each square groove needs to meet the requirement of placing 2 30T hydraulic cylinders, the position of each square groove is important, a coil group is composed of a plurality of coils and insulating parts, the whole base plate at the lower part of the coil group is only 50mm thick, the weight of each layer of coils is different and has different sizes, the slotting position needs to be positioned at the lower part of a heavier coil, the radial upward centering of the coil group is considered to be possible, if the slotting position is selected wrongly, the base plate is seriously deformed, and the coils are dislocated. When the transformer is integrally sleeved, 2 30T hydraulic cylinders and 4 hydraulic cylinders are respectively arranged on the high-voltage side and the low-voltage side of the lower part of the transformer.

And 2, according to the stroke of the hydraulic cylinder and the thickness of the thick hook foot plate, a wood block is padded at the lower part of the hydraulic cylinder, and meanwhile, the hydraulic cylinder can be detached by considering enough space after pressure relief.

And 3, selecting a thick hook plate in the integral sleeving process of the transformer, and selecting four lifting hook points which are uniformly distributed at positions avoiding coil outgoing lines and hook grooves in order to avoid cracking of hook groove steps. Fig. 2 is a schematic diagram of selecting a position of a hook point according to an embodiment of the present invention.

And 4, when the falling distance of the coil group is about 150mm of lower insulation, 3 layers of wood cushion blocks are laminated on the upper surface of the limb plate of the lower clamp (the limb plate plays a supporting role). Fig. 3 is a schematic view showing the position of the laminated wood mat according to the embodiment of the present invention.

3 layers of laminated wood cushion blocks, wherein the thickness of each layer is 50mm, and the cushion height is 150 mm. The purpose of laminating the wood cushion block layer by layer with the cushion 3 is to remove the thick hook foot plate (the hook foot plate is about 120mm thick), if the hook foot plate is not removed at this time and continuously falls, the hook foot plate is contacted with the lung lobe to interfere and cannot be removed.

And 5, installing a hydraulic cylinder cap on the hydraulic cylinder, and adding an iron plate to avoid the damage to the transformer insulating part due to overlarge local pressure, so as to ensure effective support and uniform stress.

And 6, replacing the thick hook plate in the step 3 with a thin hook plate with the thickness of 25mm, and replacing the hook plate with a thin hook plate, wherein the hook plate is the groove opening position of the lower cushion plate. And meanwhile, the hydraulic cylinder is stressed, the laminated wood cushion block placed in the step 4 is removed, the hydraulic cylinder falls while the hook falls, and importantly, 4 cylinders fall synchronously, and the coil group slowly falls to complete the integral sleeving of the transformer.

Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.