CN115798902A - Traction type hoisting construction method for high-voltage bushing of large transformer - Google Patents

Abstract

The invention provides a traction type hoisting construction method for a high-voltage bushing of a large transformer, which comprises the following steps: s001: preparing a main crane, a main sling, a binding belt and a chain block; s002: connecting the lower end of the main sling to the lower part of a high-voltage sleeve, and arranging a binding belt on the upper part of the high-voltage sleeve to enable the main sling to penetrate through the binding belt; s003: a chain block is connected between the lower part of the high-voltage sleeve and a lifting hook of the main crane; s004: hoisting an upper portion of the main hoist line by the main hoist; s005: the hanging angle of the high-voltage bushing is adjusted by adjusting the length of the chain block, so that the angle of the high-voltage bushing is the same as that of a lifting seat of the large transformer; s006: adjusting the main crane, and inserting the lower end of the high-voltage bushing into a lifting seat of the large-scale transformer; s007: and removing the main sling, the binding belt and the chain block.

Description

A large-scale transformer high-voltage bushing traction hoisting construction method

technical field

The invention relates to the field of water conservancy and hydropower equipment assembly, in particular to a traction-type hoisting construction method for high-voltage bushings of large transformers.

Background technique

In recent years, China's new energy power generation represented by wind power and photovoltaics has continued to grow rapidly, resulting in profound changes in the power supply structure in the power system. The country has also clearly pointed out that it is necessary to focus on building new energy as the main supply to ensure energy and power security. The premise is to meet the primary goal of power demand for economic and social development. In the new power system with a strong smart grid as the hub platform, large-scale transformers with a capacity of 240MVA are gradually being widely used as high-voltage bushings for large-scale transformer windings to connect power systems. The nominal voltage is higher than 1000V. The oil-paper capacitive bushing is widely used at present, and its appearance size is longer and larger than before. In the large-scale transformer installation project of the substation, the high-voltage bushing installation is divided into vertical installation and inclined installation according to the design of the lifting seat of each transformer factory. It is relatively simple to install the high-voltage bushing vertically. You only need to pass two slings through the two lifting lugs of the high-voltage bushing head tooling, and use a double cart to stand up. After standing up, the high-voltage bushing is in a vertical state. For the oblique installation of the high-voltage bushing, it is necessary to roughly convert the binding position of the bushing according to the inclination angle of the high-voltage bushing, and then install the cable wind rope, and adjust the inclination angle of the high-voltage bushing by manpower pulling. This method has a slight deviation in angle. It is necessary to manually adjust the angle continuously. After ensuring that the inclination angle of the high-voltage bushing is consistent with the inclination angle of the raised seat, the end of the high-voltage bushing can naturally penetrate into the raised seat. If the angle deviation is too large during this process, the high-voltage bushing may fall to the ground and be tied again. The risk of the lifting point is labor-intensive and time-consuming, and the gasket at the joint between the rising seat and the high-voltage casing is easy to be squeezed, displaced and deformed during the manual angle adjustment process, the bolts penetrate unnaturally, the fixation is not firm, and the bolts are unevenly stressed , resulting in problems such as poor sealing. The above problems in the installation process will leave potential safety hazards for the normal operation of the equipment in the later stage.

Contents of the invention

In view of this, the purpose of the present invention is to provide a large-scale transformer high-voltage bushing traction-type hoisting construction method for overcoming the above-mentioned problems or at least partially solving or alleviating the above-mentioned problems.

The present invention proposes a large-scale transformer high-voltage bushing traction hoisting construction method, which includes the following steps:

S001: Prepare the main crane, main sling, binding strap and chain block;

S002: Connect the lower end of the main sling to the lower part of the high-voltage bushing, set a binding strap on the upper part of the high-voltage bushing, and let the main sling pass through the binding strap;

S003: Connect a chain hoist between the lower part of the high voltage bushing and the hook of the main crane;

S004: hoisting the upper part of the main sling by the main crane;

S005: Adjust the suspension angle of the high-voltage bushing by adjusting the length of the chain block, so that the angle of the high-voltage bushing is the same as that of the raised seat of the large transformer;

S006: Adjust the main crane, and insert the lower end of the high voltage bushing into the lifting seat of the large transformer;

S007: Remove the main sling, the binding strap and the chain hoist.

In step S002, two main slings are prepared, and the lower ends of the two main slings are respectively connected to the two lugs of the bushing tooling at the lower end of the high voltage bushing.

In step S002, the two strands of the main sling are respectively bound on both sides of the high voltage bushing through the binding band.

In step S004, an auxiliary crane and an auxiliary sling are prepared, the hook of the auxiliary crane connects and lifts the lower part of the high-voltage bushing through the auxiliary sling, and the main crane lifts the high-voltage bushing through the main sling the upper part.

In step S004, after the main crane and the auxiliary crane hoist the high voltage bushing, the auxiliary crane lowers the lower end of the high voltage bushing and retracts the auxiliary sling.

In steps S005 , S006 and S007 , the rope operator is transported to the vicinity of the high-voltage casing by using the arm truck, and the rope operator operates the chain block on the bucket arm truck.

The large-scale transformer high-voltage bushing traction-type hoisting construction method of the present invention achieves the purpose of adjusting the inclination angle of the public security bushing by changing the length of the chain hoist chain of the traction sling, and realizes the rapid adjustment of the angle of the high-voltage bushing without falling to the ground. It greatly shortens the construction time for hoisting the main transformer high-voltage bushing, and saves labor and mechanical costs. After quickly adjusting the inclination angle of the high-voltage bushing, the high-voltage bushing can be inserted into the main transformer lifting seat naturally without external stress, ensuring that the gasket is not squeezed, displaced and deformed, and the bolts are inserted naturally without jamming, and the sealing is tighter, reducing The casing operation failure in the later stage of the main transformer improves the construction quality of the main transformer high-voltage casing hoisting.

Description of drawings

Fig. 1 is a schematic diagram of lifting the high voltage bushing from the ground by the traction type hoisting construction method of the large transformer high voltage bushing of the present invention;

Fig. 2 is a schematic diagram of a single crane hoisting a high-voltage casing;

Figure 3 is a schematic diagram of the installation of the high voltage bushing;

Figure 4 is a structural diagram of the connection between the high-voltage bushing and the main sling, the binding strap and the chain hoist.

In the above figure: 1 high voltage bushing; 2 main sling; 3 binding strap; 4 hand chain hoist; 5 main crane;

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Example 1

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the embodiment of the present invention proposes a large-scale transformer high-voltage bushing traction-type hoisting construction method, including the following steps: S001: Prepare the main crane 5, the main sling 2, the binding Belt 3 and chain hoist 4; connect the main sling 2 to the lower end of the high voltage casing 1; S002: connect the lower end of the main sling 2 to the lower part of the high voltage casing 1, and connect the upper part of the high voltage casing 1 Set the binding belt 3, so that the main hoist 2 rope passes through the binding belt 3; S003: connect the chain hoist 4 between the lower part of the high voltage bushing 1 and the hook of the main crane 5; S004: Lift the upper part of the main sling 2 by the main crane 5; S005: adjust the suspension angle of the high voltage bushing 1 by adjusting the length of the chain hoist 4, so that the angle of the high voltage bushing 1 is the same as that of the large transformer 8 The angles of the raised seats are the same; S006: Adjust the main crane 5, and insert the lower end of the high-voltage bushing 1 into the raised seat of the large transformer 8; S007: Remove the main sling 2, the binding strap 3 and the Chain hoists4.

In step S001, the main sling 2 adopts a 5m long round polyester sling, and the binding strap 3 adopts a 2m long round polyester sling; in step S002, one end of the main sling 2 is hung on the hook of the main crane 5 , the other end is connected to the lower part of the high-voltage bushing 1, and the two main slings 2 are tied and fixed on the top of the high-voltage bushing 1 with a 2m-long binding strap 3; in step S003, a 5T chain hoist 4 is selected, A 2m-long sling is hoisted by the hook at the lower end of the chain hoist 4. The lower end of the 2m-long sling is tied to the lower part of the high-voltage bushing 1, and the contact part between the high-voltage bushing 1 and the chain hoist 4 is wrapped with a quilt or other cushioning material to avoid bumping The hook at the upper end of the chain block 4 hooks a 3m long sling, and the upper end of the sling is placed on the hook of the main crane 5; in step S004, the main crane 5 passes the main sling 2 and the chain block 4 to The high-voltage bushing 1 is hoisted in the air; in step S005, when the main sling 2 is straightened between the binding belt 3 and the main crane 5, the extension length of the chain hoist 4 can be adjusted to realize the high-voltage Adjust the hoisting angle of the bushing 1; in step S006, adjust the hoisting angle of the high voltage bushing 1 so that it is the same as the angle of the lifting seat of the large transformer 8, and then insert the lower end of the high voltage bushing 1 into the lifting seat of the large transformer 8 In the high seat.

Example 2

Referring to FIG. 4 , in step S002 , two main slings 2 are prepared, and the lower ends of the two main slings 2 are respectively connected to the two lugs of the bushing tooling at the lower end of the high voltage bushing 1 .

The casing tooling at the bottom of the high-voltage casing 1 adopts a flange with two lifting rings, and the lower ends of the two main slings 2 are respectively connected to the two lifting rings of the flange with U-shaped rings.

Example 3

Referring to FIG. 4 , in step S002 , the two strands of the main sling 2 are respectively bound on both sides of the high voltage bushing 1 through the binding band 3 .

It is required that the two main slings 2 are symmetrically distributed at the binding strap 3 and cannot move.

Example 4

Referring to Fig. 1, in step S004, the auxiliary crane 6 and the auxiliary sling 7 are prepared, the hook of the auxiliary crane 6 is connected and lifted to the lower part of the high voltage bushing 1 through the auxiliary sling 7, and the main crane 5 is passed through The main sling 2 lifts the upper part of the high voltage bushing 1 .

The main crane 5 and the auxiliary crane 6 use the main sling 2 and the auxiliary sling 7 to horizontally hoist the high voltage bushing 1 through the double-car hoisting method.

Example 5

1 and 2, in step S004, after the main crane 5 and the auxiliary crane 6 lift the high voltage bushing 1, the auxiliary crane 6 lowers the lower end of the high voltage bushing 1 and retracts the Secondary sling 7.

After hoisting the high-voltage bushing 1 horizontally to a certain height, the auxiliary crane 6 starts to lower, so that the main crane 5 lifts the high-voltage bushing 1 through the main sling 2 and the chain hoist 4, and then unties the auxiliary sling 7 and the high-voltage bushing. The connection between pipe 1 and auxiliary crane 6 is evacuated.

Example 6

Referring to FIG. 3 , in steps S005 , S006 and S007 , the rope operator is transported to the vicinity of the high voltage bushing 1 by using the arm truck, and the rope operator operates the chain block 4 on the bucket arm truck.

The main crane 5 lifts the high-voltage bushing 1 to the top of the raised seat of the large transformer 8, and the cableman approaches the chain block 4 on the bucket arm truck, and changes the length of the chain block 4 to change the high-voltage bushing 1 during hoisting. After adjusting the angle to be consistent with the angle of the raised seat of the large transformer 8, lower the high-voltage bushing 1 through the main crane 5, insert the lower end of the high-voltage bushing 1 into the raised seat with the assistance of the cableman, and then The cableman untied the connection between the main sling 2, the binding belt 3 and the chain block 4 and the high-voltage bushing 1, and the main crane 5 was withdrawn.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims. The components and structures not described in detail in this embodiment are known components and common structures or common means in this industry, and are not described here one by one.

Claims (6)

1. A large transformer high-voltage bushing traction type hoisting construction method is characterized by comprising the following steps:

s001: preparing a main crane, a main sling, a binding belt and a chain block;

s002: connecting the lower end of the main sling to the lower part of a high-voltage sleeve, and arranging a binding belt on the upper part of the high-voltage sleeve to enable the main sling to penetrate through the binding belt;

s003: a chain block is connected between the lower part of the high-voltage sleeve and a lifting hook of the main crane;

s004: hoisting an upper portion of the main hoist line by the main hoist;

s005: the hanging angle of the high-voltage bushing is adjusted by adjusting the length of the chain block, so that the angle of the high-voltage bushing is the same as that of a lifting seat of the large transformer;

s006: adjusting the main crane, and inserting the lower end of the high-voltage bushing into a lifting seat of the large-scale transformer;

s007: and removing the main sling, the binding belt and the chain block.

2. The ball-type intelligent automatic pitching device of claim 1, wherein in step S002, two main slings are prepared, and the lower ends of the two main slings are respectively connected to two lifting eyes of a casing tool at the lower end of the high voltage casing.

3. The ball-type intelligent automatic pitching device according to claim 1, wherein in step S002, two strands of said main slings are bound to both sides of a high voltage bushing by said binding bands, respectively.

4. The ball-type intelligent automatic pitching apparatus according to claim 1, wherein in step S004, an auxiliary hoist and an auxiliary hoist line are prepared, the hook of the auxiliary hoist is connected to and hoists the lower part of the high voltage bushing by the auxiliary hoist line, and the main hoist hoists the upper part of the high voltage bushing by the main hoist line.

5. The ball-type intelligent automatic pitching apparatus of claim 4, wherein in step S004, after said main crane and said auxiliary crane lift the high voltage bushing, said auxiliary crane lowers the lower end of the high voltage bushing and retracts said auxiliary slings.

6. The sphere-type intelligent automatic pitching device according to claim 1, wherein in steps S005, S006 and S007, a dragger is used to transport a dragger to the vicinity of the high voltage bushing, and the dragger operates the chain block on the dragger.

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