CN216667129U

CN216667129U - Special rack for matching and transferring transformer of main pump frequency converter of nuclear power station

Info

Publication number: CN216667129U
Application number: CN202220095239.1U
Authority: CN
Inventors: 赵溟雨; 刘建喜; 张卢翼; 谢永庆; 刘俊良; 白晓琛; 祁智强
Original assignee: Sanmen Nuclear Power Co Ltd
Current assignee: Sanmen Nuclear Power Co Ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-06-03
Anticipated expiration: 2032-01-14

Abstract

The utility model discloses a special tool for transferring a main pump frequency converter transformer in a matching manner, and belongs to the technical field of electric power construction equipment. The device comprises a base, a supporting component fixedly arranged on the base and a bearing component fixedly arranged at the top end of the supporting component and used for bearing a main pump frequency converter transformer; one end of the bearing component is correspondingly matched with an outlet of a main pump frequency converter transformer transfer channel, and a weight box is arranged at the end head of the other end of the bearing component; and a plurality of weight boxes are arranged on the side surface of the support component far away from the main pump frequency converter transformer transfer channel port. The problem of the transformer transported to the factory building and transported the unable completion of passway and transport is solved, this rack simple structure, simple to operate.

Description

Special rack for matching and transferring transformer of main pump frequency converter of nuclear power station

Technical Field

The utility model belongs to the technical field of electric power construction equipment, and particularly relates to a special tool for transferring a main pump frequency converter transformer in a matching manner.

Background

During normal operation of the nuclear power station, the main pump drives pressurized water to circularly flow in the steam generator and the reactor, but in actual production operation, a transformer of the main pump frequently breaks down, and when the transformer breaks down, the whole unit needs to immediately perform power reduction and shutdown operations. In order to reduce the loss caused by the fault of the main pump transformer, the transformer with the fault needs to be replaced at the fastest speed, the shutdown and shutdown time is reduced as much as possible, however, the net weight of the transformer reaches 13.18 tons, and the transformer cannot be directly transferred by using hoisting equipment inside a plant due to the influence factors of the size of the plant space, transportation channel obstacles, peripheral structures and the like, so that the transfer difficulty is very high, and no finished product can be selected.

When actually changing trouble transformer, put into claw formula jack claw earlier four angles of transformer subassembly, push up transformer subassembly again from the bottom surface take the altitude, but put into at transformer subassembly four corners atress point and transport the little tank, wherein the one end that transformer subassembly is close to the factory building export is settled universal and is transported the little tank, and the other end is placed the directional transfer little tank. Hanging chain blocks on anchor points on the other two sides of the transformer assembly respectively, wherein the other end of each chain block is connected with a fixed anchor point of the plant to fix the transformer assembly; the jack pressure release lets transformer subassembly press on transporting the tankmoup, then lays ground protection backing plate in advance on the transportation passageway of transporting the tankmoup. Pulling chain block shifts into the transfer passageway with the transformer subassembly from the mounted position, and then shifts into the transfer passway mouth of factory building through with the transformer subassembly from original position on the transfer passageway, and there is certain difference in height in factory building transfer passway mouth compare in ground, therefore the transformer subassembly can't be transported out of the factory building by direct or the subassembly that needs get into the factory building can't accomplish the transportation.

SUMMERY OF THE UTILITY MODEL

The special rack for transferring the transformer of the main pump frequency converter of the nuclear power station in a matched manner is provided for solving the problem that the transformer cannot be continuously transferred after being transferred to a transfer passage opening of a factory building. This rack simple structure, simple to operate can accomplish and transport the unable problem of transporting of nuclear power station main pump converter transformer in-process at the transport entrance.

The special rack for matching and transferring the transformer of the main pump frequency converter of the nuclear power station comprises a base, a supporting component fixedly arranged on the base and a bearing component fixedly arranged at the top end of the supporting component and used for bearing the transformer of the main pump frequency converter; one end of the bearing assembly is a matching end corresponding to an outlet of a main pump frequency converter transformer transfer channel, and the other end of the bearing assembly is a counterweight end provided with a counterweight box; and a counterweight box is also arranged at the same end of the supporting component and the counterweight end.

Preferably, the base comprises a fixed frame and reinforcing ribs which are positioned in the fixed frame and are arranged in parallel with the two side edges; the four corners of fixed frame and the junction of fixed frame and strengthening rib are equipped with the confession the mount pad that supporting component set up.

Preferably, the supporting component comprises an upper bracket which is matched with the bearing component and a lower bracket which is matched with the base; the upper bracket comprises a plurality of vertically arranged support columns and a plurality of reinforcing connecting rods for connecting two adjacent support columns; the structure of the lower support is the same as that of the upper support, one end of a lower support column of the lower support is matched with the mounting seat, and the other end of the lower support column of the lower support is matched with the support column of the upper support.

Preferably, a plurality of detachable support legs for improving the stability of the support assembly are arranged on the outer side of the lower support frame.

Preferably, a connecting piece for fixedly mounting the support legs is arranged on the outer side surface of the lower support column.

Preferably, a plurality of gaskets for adjusting the height of the bearing assembly are arranged at the matching part of the top end of the supporting column of the upper bracket and the bearing assembly; and a gasket for adjusting the height of the support is arranged between the top end of the lower support column and the bottom end of the upper support column.

Preferably, the bearing assembly comprises a bearing table board and a safety fence which is arranged on the edge of the bearing table board and provided with a notch at the position corresponding to the transfer passage opening of the main pump frequency converter transformer.

Preferably, a rubber pad for preventing the main pump frequency converter transformer from generating excessive displacement is arranged at one end, away from the outlet of the main pump frequency converter transformer conveying channel, of the upper surface of the bearing table board.

Preferably, a transition piece matched with the outlet of the main pump frequency converter transformer transportation channel is arranged at one end, matched with the outlet of the main pump frequency converter transformer transportation channel, of the upper surface of the bearing table board.

Preferably, a hook is arranged at one end, far away from the transfer passage opening, of the bearing table board.

In conclusion, the utility model has the following beneficial effects:

the special rack for matching and transferring the main pump frequency converter transformer of the nuclear power station is provided with the base, the supporting assembly and the bearing assembly, the supporting assembly comprises the upper support and the lower support, the rack can meet the requirements of floors with different heights of a plant, the bearing assembly corresponds to the transfer passage opening, the main pump frequency converter transformer to be transferred can enter and exit the plant through the bearing assembly, the main pump frequency converter transformer on the bearing assembly can be acted by hoisting equipment, and the problem that the main pump frequency converter transformer cannot be hoisted or transferred at the transfer passage opening can be solved.

Drawings

FIG. 1 is a schematic view of a dedicated gantry;

FIG. 2 is a schematic view of a base structure;

FIG. 3 is a schematic view of the lower bracket structure;

FIG. 4 is a combination of an upper support and a load-bearing table;

FIG. 5 is a schematic view of the structure between the upper and lower brackets combined with the gasket;

FIG. 6 is a schematic view of the combination of a support column and a profile lifting lock;

FIG. 7 is a schematic view of the support post mounted on the base;

FIG. 8 is a schematic view of the pre-installation structure of the upper and lower brackets;

FIG. 9 is a schematic structural view of example 2.

100, section bar hoisting lockset; 200. a bolt;

1. a base; 11. a fixing frame; 12. reinforcing ribs; 13. a mounting seat; 2. a support assembly; 21. an upper bracket; 21-1, a support column; 21-2, reinforcing connecting rods; 22. a lower bracket; 22-1, a lower support column; 22-1a, a connecting piece; 23. a support leg; 3. A load bearing assembly; 31. a bearing table surface; 31-1, rubber pads; 31-2, transition pieces; 31-3, a hook; 32. a security fence; 4. a weight box; 5. and (7) a gasket.

Detailed Description

The utility model is further explained below with reference to the drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example 1

Referring to fig. 1-9, a special rack for transferring a transformer of a main pump frequency converter of a nuclear power plant in a matching manner comprises a base 1 made of steel and detachable, a supporting component 2 fixedly installed on the base 1, and a bearing component 3 fixedly installed at the top end of the supporting component 2 and used for bearing the transformer of the main pump frequency converter.

One end of the bearing component 3 corresponds to the outlet of the main pump frequency converter transformer transfer passage, and a first detachable weight box 4 is arranged at the end of the other end of the bearing component. And a plurality of second weight boxes 4 are arranged on the side surface, far away from the main pump frequency converter transformer transferring channel port, of the supporting component 2. The quantity of weight box 4 increases and decreases according to actual demand, generally adopts two or three in this scheme.

The base 1 is composed of two parallel long H-shaped steels and four parallel short H-shaped steels, and two ends of the short H-shaped steels are fixed on the inner sides of the H-shaped steels through screws. The upper surface of the joint of the longer H-shaped steel and the shorter H-shaped steel is provided with a mounting seat 13 for fixing the support component 2. In a three-door nuclear power plant, the length of a generally long H-section steel is seven meters and the length of a shorter H-section steel is three meters.

Wherein the support assembly 2 comprises an upper bracket 21 and a lower bracket 22. The top end of the upper bracket 21 is matched with the bearing component 3, and the lower bracket 22 is matched with the base 1. The upper bracket 21 comprises eight vertically arranged supporting columns 21-1, namely a, b, c, d, e, f, g and h, and the top end of each supporting column 21-1 is connected with the lower bottom surface of the bearing component 3 in a matching manner. Four reinforcing connecting rods 21-2 are arranged between two adjacent supporting columns 21-1a and b, crossed reinforcing connecting rods 21-2 are arranged between the supporting columns 21-1a and the supporting columns 21-1b, and transverse reinforcing connecting rods 21-2 are arranged between the supporting columns 21-1a and the supporting columns b and close to the upper top end and the lower top end. A connecting rod is arranged between the support columns 21-1 which are diagonally arranged by the adjacent four support columns 21-1. The matching connection mode between two adjacent support columns 21-1 of the eight support columns 21-1 of the upper support 21a, b, c, d, e, f, g and h and the connecting rod is the same. The lower bracket 22 has the same structure as the upper bracket 21. The bottom end of the supporting column 21-1 of the upper bracket 21 is fixedly connected with the top end of the corresponding lower supporting column 22-1 of the lower bracket 22 through a bolt 200. The bottom end of the lower support column 22-1 of the lower bracket 22 is fixed with the mounting seat 13 on the base 1 through a bolt 200. The length of the support column 21-1 of the upper bracket 21 and the length of the lower support column 22-1 of the lower bracket 22 are changed according to actual needs.

The weight box 4 is arranged on the side surface formed by the upper bracket 21a and the h support rods.

Wherein, the outer side of the lower bracket 22 is provided with four detachable legs 23 for improving the stability of the supporting component 2. The top ends of the supporting legs 23 are movably arranged on the lower supporting column 22-1. The upper end and the lower end of the outer side surface of the supporting column 21-1 are respectively provided with a connecting piece 22-1a which is in hinged fit with the top end of the supporting leg 23. The top end of the supporting leg 23 is hinged and matched with the connecting piece 22-1a at the top end of the supporting column 21-1, and a connecting rod for fixing the included angle between the supporting leg 23 and the supporting column 21-1 is arranged between the bottom end of the supporting leg 23 and the connecting piece 22-1a at the bottom end of the lower supporting column 22-1. The legs 23 and attached lower support columns 22-1 form a triangular stabilizing relationship with the ground.

The top end of the support column 21-1 of the upper bracket 21 is matched and fixed with the support component 2 through a bolt 200, and four gaskets 5 with different thicknesses and used for adjusting the height of the bearing component 3 are arranged between the top end of the support column 21-1 of the upper bracket 21 and the support component 2. The top end of the lower supporting column 22-1 of the lower bracket 22 is fixedly connected with the bottom end of the supporting column 21-1 of the upper bracket 21 through a bolt 200, and four gaskets 5 with different thicknesses for adjusting the height of the bearing component 3 are arranged between the top end of the lower supporting column 22-1 of the lower bracket 22 and the bottom end of the supporting column 21-1 of the upper bracket 21. The bottom most shim 5 has the greatest thickness and the smallest tip thickness. The thickness of the spacer 5 is 3mm/6mm/8mm/10mm, respectively.

The bearing component 3 comprises a bearing table board 31 for bearing a main pump frequency converter transformer, and a safety fence 32 which is arranged on the edge of the bearing table board 31 and provided with a notch at the position corresponding to a transfer passage port of the main pump frequency converter transformer. The safety rail 32 is removable. And a rubber pad 31-1 for preventing the main pump frequency converter transformer from colliding with the safety fence 32 is arranged at one end of the upper surface of the bearing table top 31, which is far away from the outlet of the main pump frequency converter transformer transportation channel. The rubber pad 31-1 acts primarily on the wheels of the tankers. And a transition piece 31-2 matched with the outlet of the main pump frequency converter transformer conveying channel is arranged at one end, matched with the outlet of the main pump frequency converter transformer conveying channel, of the upper surface of the bearing table board 31. And a hook 31-3 is arranged at one end of the bearing table surface 31 far away from the transfer passage opening. The hook 31-3 is used for being combined with a traction device for drawing a transformer of a main pump frequency converter.

Example 2

The present embodiment differs from the above-described embodiments in that the support assembly 2 comprises only the upper bracket 21 or the lower bracket 22 of the above-described embodiments in the case of a transfer of a pump frequency converter transformer in the face of a relatively low floor. The bottom end of the supporting column 21-1 of the upper bracket 21 is directly connected with a through hole on the base 1 through a bolt 200 or the top end of the supporting column 21-1 of the lower bracket 22 is directly fixedly connected with the lower bottom surface of the bearing table 31 through a bolt 200.

The installation and use methods of the above embodiments 1 and 2:

the mounting of the gantry requires a tool: a crane (rated load more than 10T), a section hoisting lock 100, a common ratchet solid wrench, a torque wrench and a hydraulic elevator/high ladder.

The base 1 is installed:

base 1 is assembled in the spacious region, and all bolts 200 are manually screwed after installation, and do not need to tighten the pre-tightening torque, and after the installation, the diagonal error is +/-3 mm.

The support component 2 is installed:

the upper bracket 21 of the support component 2 is preassembled, the support columns 21-1 are sequentially installed on the base 1 in sequence, and the support columns 21-1 are fixed through bolts 200. Wherein, the support column 21-1 is vertically hoisted: firstly, the section bar hoisting lockset 100 is arranged at the top end of a support column 21-1 through a bolt 200, the bolt 200 is screwed by using a twisting force, and then a lifting hook of a crane is used for acting on the section bar hoisting lockset 100, so that the support column 21-1 is erected on a base 1 in an upright state. The fixed connecting rod and the supporting column 21-1 are installed through the bolt 200, but the bolt 200 does not need to apply pre-tightening torque. The weight box 4 is fixedly mounted on the outer sides of the a and h support columns 21-1 by bolts 200, but bolts 200 do not require a pretensioning moment.

The bearing table board 31 is installed in a hoisting mode, and because the accurate height between the lower floor and the ground is not known in the first installation, 1 base plate with the thickness of 3mm, 6mm, 8mm and 10mm needs to be padded between the bearing table board 31 and the connecting flange of the supporting column 21-1 in advance. The safety fence 32 is arranged on the periphery of the bearing table 31; and a rubber pad 31-1 is arranged on one end of the bearing table surface 31 far away from the transfer passage port. The end of the loading table 31 remote from the transfer passage opening is provided with a weight box 4. The connecting bolts 200 of the rack base 1 and the upper bracket 21 are all removed, and the combination of the supporting component 2 and the bearing component 3 is lifted away from the rack base 1 and is placed on the ground of a free place for standby.

The lower support 22 of the lower support component 2 is assembled on the base 1, the lower support columns 22-1 are sequentially installed on the base 1 in sequence, and the lower support columns 22-1 are fixed through bolts 200. Wherein the lower support column 22-1 is vertically hoisted: firstly, the profile hoisting lockset 100 is installed at the top end of the lower support pillar 22-1 through the bolt 200, the bolt 200 is tightened by using a twisting force, and then the hook of the crane is used for acting on the profile hoisting lockset 100, so that the lower support pillar 22-1 stands on the base 1 in an upright state. When installing the fixed connecting rod, the connecting bolt 200 needs to be installed completely, but does not apply a pre-tightening torque. The connecting bolts 200 of the rack base 1 and the lower bracket 22 are all removed and are placed on the ground of a vacant place for standby.

In the operation of embodiment 1, the center of the pedestal 1 of the gantry is aligned with the center of the transfer passage opening of the low floor, and then the lower bracket 22 is fixed to the pedestal 1 according to the above operation steps, and all the bolts 200 need to be tightened with a pre-tightening torque. Wherein bolt 200 pretension moment: M833.73N × M; M12116.53N × M; M20564.48N × M. At this point the weight box 4 is removed. And (3) mounting the spare assembly of the support component 2 and the bearing component 3 on the lower support 22, wherein 1 cushion plate with the thickness of 3mm, 6mm, 8mm and 10mm is arranged between the connecting flanges of the support column 21-1 of the upper support 21 and the lower support column 22-1 of the lower support 22. When the height of the bearing table 31 is not consistent with the height of the floor where the transfer passage is located, the height of the bearing table 31 is required to meet the requirement by adjusting the spacers 5 between the bearing assembly 3 and the upper bracket 21 and the spacers 5 between the upper bracket 21 and the lower bracket 22. When the adjusted heights are consistent, the transition piece 31-2 is matched with the transfer passage port, so that materials to be transferred can enter the bearing table board 31 or materials on the bearing table board 31 can enter a factory building.

When the operation of embodiment 2 is performed, the center of the gantry base 1 is aligned with the center of the transfer passage opening of the low floor, and then the spare assembly of the bearing component 3 and the upper bracket 21 is fixed to the base 1 according to the above operation steps, and all the bolts 200 need to be tightened with a pre-tightening torque. Wherein bolt 200 pretension moment: M833.73N × M; M12116.53N × M; M20564.48N × M. And the weight box 4 is removed. When the height of the bearing table 31 is not consistent with the height of the floor where the transfer passage is located, the height of the bearing table 31 is required to be satisfied by adjusting the spacer 5 between the bearing assembly 3 and the upper bracket 21. When the adjusted heights are consistent, the transition piece 31-2 is matched with the transfer channel port, so that the materials to be transferred can enter the bearing table 31. The material to be transported on the bearing table top 31 can be transferred away from the transporting table frame through the hoisting equipment, or the material to be transported into the factory building is lifted to the bearing table top 31 through the hoisting equipment.

During the operation, when the backing plates are increased or decreased, all the connecting bolts 200 are required to be detached, the parts above the adjusting parts are detached, then the backing plates are fixed through the positioning pin holes in the connecting plates, the thick backing plates are placed above the adjusting parts, the thin backing plates are placed below the adjusting parts, and the parts above the adjusting parts are hoisted to the original positions after the backing plates are additionally installed.

When the connecting parts of the bearing table top 31 and the upper bracket 21 and the lower bracket 22 are reduced by the cushion plates, the thickness and the number of the cushion plates which need to be increased or extracted need to be calculated in advance, then the bolts 200 are taken out to jack the table top, and then the cushion plates between the bearing table top 31 and the upper bracket 21 or between the upper bracket 21 and the lower bracket 22 are extracted or increased.

After the adjustment of the relative position of the bearing table-board 31 is completed, the actual size of the installation is recorded, and the thickness and the number of the cushion boards are recorded, so that the next positioning installation is facilitated.

The position of the rack base 1 can be directly marked on the ground, and the rack base 1 can be conveniently installed in place in one step when the rack is installed next time.

Claims

1. A special rack for coordinating transport nuclear power station main pump converter transformer, its characterized in that: the device comprises a base (1), a supporting component (2) fixedly arranged on the base (1) and a bearing component (3) fixedly arranged at the top end of the supporting component (2) and used for bearing a main pump frequency converter transformer; one end of the bearing assembly (3) is a matching end corresponding to an outlet of a main pump frequency converter transformer transfer passage, and the other end of the bearing assembly is a counterweight end provided with a counterweight box (4); and a counterweight box (4) is also arranged at the same end of the supporting component (2) as the counterweight end.

2. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power plant as claimed in claim 1, wherein: the base (1) comprises a fixed frame (11) and reinforcing ribs (12) which are positioned in the fixed frame (11) and are arranged in parallel with the two side edges; the four corners of the fixed frame (11) and the joints of the fixed frame (11) and the reinforcing ribs (12) are provided with mounting seats (13) for the support assemblies (2) to be arranged.

3. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power station as claimed in claim 2, wherein: the supporting component (2) comprises an upper bracket (21) which is matched and installed with the bearing component (3) and a lower bracket (22) which is matched and installed with the base (1); the upper support (21) comprises a plurality of vertically arranged supporting columns (21-1) and a plurality of reinforcing connecting rods (21-2) for connecting two adjacent supporting columns (21-1); the structure of the lower support (22) is the same as that of the upper support (21), one end of a lower support column (22-1) of the lower support (22) is matched with the mounting base (13), and the other end of the lower support column is matched with the bottom end of a support column (21-1) of the upper support (21).

4. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power station as claimed in claim 3, wherein: a plurality of detachable supporting legs (23) used for improving the stability of the supporting component (2) are arranged on the outer side of the lower support (22).

5. The special rack for matching and transferring the frequency converter transformer of the main pump of the nuclear power plant as claimed in claim 4, wherein: and a connecting piece (22-1 a) for fixedly mounting the supporting leg (23) is arranged on the outer side surface of the lower supporting column (22-1) of the lower support (22).

6. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power station as claimed in claim 3, wherein: a plurality of gaskets (5) for adjusting the height of the bearing component (3) are arranged at the matching part of the top end of the supporting column (21-1) of the upper bracket (21) and the bearing component (3); and a gasket (5) for adjusting the height of the bearing component (3) is arranged between the top end of the lower support column (22-1) of the lower support (22) and the bottom end of the support column of the upper support (21).

7. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power plant as claimed in claim 1, wherein: bear subassembly (3) including bearing mesa (31) and locate bearing mesa (31) edge and with main pump converter transformer transfer passage export department be equipped with breach security fence (32).

8. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power plant as claimed in claim 7, wherein: and a rubber pad (31-1) for preventing the main pump frequency converter transformer from generating excessive displacement is arranged at one end, away from the outlet of the main pump frequency converter transformer conveying channel, of the upper surface of the bearing table top (31).

9. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power plant as claimed in claim 7, wherein: and a transition piece (31-2) matched with the outlet of the transformer transportation channel of the main pump frequency converter is arranged at one end, matched with the outlet of the transformer transportation channel of the main pump frequency converter, of the upper surface of the bearing table top (31).

10. The special rack for matching and transferring the transformer of the frequency converter of the main pump of the nuclear power plant as claimed in claim 7, wherein: and a hook (31-3) is arranged at one end of the bearing table top far away from the outlet of the transfer channel.