CN215329798U

CN215329798U - Converter station jacket

Info

Publication number: CN215329798U
Application number: CN202121073777.2U
Authority: CN
Inventors: 周路林; 季秋兵; 沈鹏鹏; 施浩杰
Original assignee: Nantong Zhenhua Heavy Equipment Manufacturing Co Ltd
Current assignee: Nantong Zhenhua Heavy Equipment Manufacturing Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-12-28
Anticipated expiration: 2031-05-19

Abstract

The utility model relates to a jacket of a converter station, which comprises a plurality of main upright posts, a plurality of fork tubes, a plurality of horizontal trusses and a plurality of shear support tubes, wherein the main upright posts are grouped pairwise, and one group of main upright posts are vertical and are arranged in parallel; the forked tube is provided with four ends, and the four ends of the forked tube are symmetrically connected with a group of main columns so as to form a main column sheet unit; the four horizontal trusses are horizontally and fixedly connected with the main upright posts to form the main upright post end parts of the sheet body units; the scissors supporting tube is fixedly connected with two horizontal trusses positioned on the same vertical side face. The scheme has the advantages that: the integrity of jacket construction can be effectively guaranteed, the accuracy and quality requirements of jacket construction forming are met, and jacket construction cost is reduced.

Description

Converter station jacket

Technical Field

The scheme is a jacket construction technology of a three gorges convertor station, and particularly relates to a jacket which can ensure the building and forming dimensional precision and the building quality of the jacket and can effectively reduce the cost.

Background

The three gorges offshore convertor station is a powerful product in the field of ocean modular engineering of the company march. The three gorges offshore converter station is arranged between two wind farms, each wind turbine generator in the wind farms is connected to the 220kV offshore booster station through a 35kV submarine cable after being boosted through a generator set boosting transformer, and is connected to the offshore converter station through 2 loops of 220kV submarine cables after being boosted to 220kV through respective offshore booster stations, and the converted direct current is transmitted to the land through 1 loop of +/-400 kV direct current submarine cables. The offshore converter station comprises an upper module and a lower module, and the jacket is the most important structure in the lower module, so that the requirement on the structural strength and the construction precision of the jacket is extremely high.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved in the scheme is to provide a converter station jacket which can ensure the dimensional accuracy and effectively reduce the cost at the same time:

a jacket of a converter station comprises a plurality of main upright columns, a plurality of fork-shaped pipes, a plurality of horizontal trusses and a plurality of shear supporting pipes, wherein every two main upright columns form a group, and one group of main upright columns are vertical and are arranged in parallel; the forked tube is provided with four ends, and the four ends of the forked tube are symmetrically connected with a group of main columns so as to form a main column sheet unit; the four horizontal trusses are horizontally and fixedly connected with the main upright posts to form the main upright post end parts of the sheet body units; the scissors supporting tube is fixedly connected with two horizontal trusses positioned on the same vertical side face.

The jacket of the converter station is further designed in such a way that a main upright post sheet forming unit is provided with two forked pipes, and the two forked pipes are longitudinally distributed between the two main upright posts of the main upright post sheet forming unit.

The jacket of the converter station is further designed in that a plurality of reinforcing pipes are connected between the top horizontal trusses and between the bottom horizontal trusses respectively.

The jacket of the converter station is further designed in that the main upright post is formed by splicing a plurality of cylinders.

The scheme has the advantages that: can effectively ensure the integrity of the jacket construction

The accuracy and the quality requirement of the building and forming of the jacket are met, and the building cost of the jacket is reduced.

Drawings

Fig. 1 is a schematic view of the jacket structure of the present invention.

Detailed Description

The utility model is further illustrated by the following figures and examples in conjunction with the description:

the jacket of the converter station comprises a plurality of main columns 1, a plurality of fork pipes 2, a plurality of horizontal trusses 3 and a plurality of shear support pipes 4, wherein the main columns are grouped pairwise, and one group of main columns are vertical and are arranged in parallel; the forked tube is provided with four ends, and the four ends of the forked tube are symmetrically connected with a group of main columns so as to form a main column sheet unit; the four horizontal trusses are horizontally and fixedly connected with the main upright posts to form the main upright post end parts of the sheet body units; the scissors supporting tube is fixedly connected with two horizontal trusses positioned on the same vertical side face.

A main upright lamellar unit has two forked pipes 2 which are longitudinally distributed between the two main uprights of the main upright lamellar unit.

And a plurality of reinforcing pipes 5 are respectively connected between the horizontal trusses positioned at the top and the bottom. The main upright post is formed by splicing a plurality of cylinders.

The construction process of this example is as follows:

divide into a plurality of lamellar bodies with the jacket and carry out the part preparation, improve the pre-installation rate, guarantee the part integrality, reduce the phenomenon of moving a fire behind the lacquer, the part paints the back and carries out whole the assembling to the outfield, reduces high altitude construction's risk, guarantees welding quality, has improved total and has pieced together efficiency, has reduced manufacturing cost.

The jacket main stand column sheet forming unit is composed of two main stand columns and two fork-shaped pipes, the jacket main stand columns are large in cylinder diameter, long in length and thick in plate thickness, welding control is not in place or measures are not adopted properly, welding stress cracks are easy to generate particularly, in order to avoid the situation, the jacket main stand columns are subjected to welding test and comparison in multiple test sections, jacket main stand column pairing forms are subjected to discussion research for multiple times, finally, 5 sections of cylinders are determined to be adopted to perform pairing on a pairing machine, after the pairing is completed, the roller frames are hoisted to be welded, splicing is performed in a 5+5 mode, welding quality can be guaranteed, and splicing efficiency can be improved. When splicing, attention needs to be paid to the distribution of the adjacent longitudinal seams of the cylinder. When the jacket main column body is assembled, a ground sample line needs to be marked on a tire position, and when the ground sample line is marked, welding shrinkage needs to be increased and decreased according to previous welding test data so as to ensure that the precision size of the welded main column body meets the standard requirement. Hoisting jacket head tree and scissors stay tube to the bed-jig that the cloth is good in advance on, adjusting the longitudinal joint direction of branch pipe, measuring the person in charge of jacket head tree lamellar body and the size of opening a grade between the branch pipe, diagonal dimension, positioning data such as whole level, after measured data accords with technical requirement, adopt the horse board fixed, adopt the decimal welder, carry out the symmetric welding according to the WPS requirement. For reducing the fire behind the lacquer, need install crashproof structure, accessories structures such as sacrificial anode and top outfitting platform after the welding of main upright post lamellar structure is accomplished.

The jacket scissors support tube is manufactured by drawing ground sample lines such as a cross center line, an angle line, an appearance contour line, a necessary auxiliary installation line and the like according to a drawing. Arranging a jig frame according to a jig frame design drawing, adjusting the level of the jig frame, hoisting a scissor supporting pipe in sequence for tire loading and positioning, wherein the supporting pipe needs to rotate in the longitudinal joint direction according to the drawing requirement, so that the condition of subsequent weld joint interference with an accessory structure is avoided; meanwhile, the position of the through pipe of the scissor supporting pipe needs to be identified, the overall levelness, the angle, the diagonal size and the opening of the scissor supporting pipe are measured after the scissor supporting pipe is hoisted in place, and process supports need to be installed on two sections of the scissor supporting pipe after the precision size is adjusted, so that welding shrinkage after the scissor supporting pipe is welded is prevented, and the manufacturing precision of the scissor supporting pipe is prevented from being influenced. The scissors stay tube welding process needs to adopt the symmetrical welding mode of the even number of welders to weld, the welding process needs to be executed strictly according to the wps requirement, flaw detection and precision measurement are carried out after welding, and accessory structures such as an anti-collision structure, a cable pipe and a sacrificial anode are installed after the precision dimension meets the standard requirement.

And (3) manufacturing the horizontal truss, namely marking out a ground sample line according to a drawing, and increasing and decreasing the welding shrinkage in the width direction of the horizontal truss according to the parameters of the previous welding test during marking so as to ensure the manufacturing precision of the truss. Drawing a central line, a main structure line, an outer contour line and the like of the truss; and arranging the jig frame according to a jig frame design drawing and adjusting the level of the jig frame. Hoisting a main pipe at one side for positioning the upper tire, hoisting a branch pipe in the middle of the truss for positioning, hoisting a main pipe at the other side for positioning, measuring the length, the width, the diagonal dimension, the integral levelness and the like of the horizontal truss according to a precision measuring meter, adjusting in time if the precision exceeds the tolerance before welding, and welding after the data to be measured is qualified. Welding needs to be strictly welded according to the wps requirement, the left side and the right side need be symmetrical welding simultaneously, weld seam flaw detection inspection and precision measurement are carried out after welding, and the accessory structures such as anti-sinking plate, sacrificial anode, outfitting ladder platform are installed to the qualified back of precision measurement.

And in the general assembly of the jacket, firstly, drawing a ground sample line on a general assembly tire position according to a drawing, drawing a jacket central line, a main upright post positioning line, a jacket outer contour line, an inspection line and the like, and additionally releasing welding shrinkage in the length direction of the jacket during drawing so as to ensure the accuracy of the welded jacket.

(1) Corresponding main upright post supporting jig frames and supporting jig frames of the bottom truss are arranged according to the design scheme of the total assembling jig frame, and the jig frames need to be connected through process support so as to ensure sufficient rigidity. And measuring the level and the height difference of the jig frame after the jig frame is arranged, and if the requirement of a drawing is not met, timely adjusting and retesting.

(2) The tire positioning is gone up to the head tree lamellar body in the middle of hoisting earlier, the head tree lamellar body needs to fix the rope of preventing shaking of predetermineeing before the hoist and mount, hoist the head tree lamellar body to behind the predetermined child position door machine temporarily not loose the hook, the height of the head tree lamellar body is measured to the accurate team of accuse, hang down straightness and suitable for reading the levelness, if the out-of-tolerance needs the adjustment to target in place, welded fastening lower jaw fender frame supports after the head tree lamellar body precision meets the requirements, then fix the rope of preventing shaking of both sides on the counter weight of design, adjust the turnbuckle, it is taut to ensure to prevent shaking the rope, wait to control the size retest to accomplish to confirm again and to carry out the loose hook again after being errorless.

(3) Hoisting the horizontal truss on the left side, positioning the upper tire, measuring the overall levelness, the installation height and the opening size of the horizontal truss, and welding and fixing the horizontal truss by using a horse board after error-free measurement.

(4) The upper tire of the scissors supporting tube on two sides of the horizontal truss is hoisted for positioning, the anti-shaking rope at the top needs to be fixed on the scissors supporting tube before hoisting, the scissors supporting tube is hoisted onto the horizontal truss and is not loosened temporarily, the team is controlled to measure the verticality of the scissors supporting tube, the levelness of two sections, the height of the top, the opening size and the like, the scissors supporting tube is fixed by welding a lengthened horse plate after the measured data is qualified, the anti-shaking rope of the scissors supporting tube is pulled to a designed balance weight and is tensioned, and the anti-shaking rope is loosened after the precision size is retested to be qualified.

(5) And (3) hoisting the top horizontal truss, measuring the integral level of the horizontal truss after the horizontal truss is hoisted in place, the verticality of the horizontal truss and the main upright post, the opening size, the installation height and the like, wherein the measurement tolerance meets the requirement and is fixed by adopting horse board welding.

(6) Hoist tip main column lamellar body, fixed anti-sway rope before the main column lamellar body hoist and mount, wait that the main column lamellar body hoist and mount not loose the hook after targetting in place temporarily, the height of the main column lamellar body is measured to the accurate team, hang down straightness and suitable for reading levelness, if need adjust to target in place by the ultratolerance, welded fastening end opening fender frame support after main column lamellar body precision meets the requirements, then fix the anti-sway rope of both sides to the counter weight of design on, adjust the turn buckle, it is taut to ensure to prevent sway the rope, wait to control the size retest to accomplish and confirm to carry out the unhindered back again and loosen the hook.

(7) The horizontal truss structure on the right side, the scissors supporting tubes, the top horizontal truss and the main upright post sheet body on the end part are hoisted after the left jacket is formed, and the assembling mode and the attention main points are the same as those of the mode.

(8) According to the structure of the accessory in bulk of the closure opening, the structural integrity of the jacket is checked, the precision size of the jacket is measured before welding, and if deviation exists, adjustment is needed, so that the precision size is ensured to meet the standard and specification requirements.

Claims

1. A jacket of a converter station is characterized by comprising a plurality of main upright columns, a plurality of fork-shaped pipes, a plurality of horizontal trusses and a plurality of shear supporting pipes, wherein the main upright columns are grouped pairwise, and one group of main upright columns are vertical and are arranged in parallel; the forked tube is provided with four ends, and the four ends of the forked tube are symmetrically connected with a group of main columns so as to form a main column sheet unit; the four horizontal trusses are horizontally and fixedly connected with the main upright posts to form the main upright post end parts of the sheet body units; the scissors supporting tube is fixedly connected with two horizontal trusses positioned on the same vertical side face.

2. A converter station jacket according to claim 1, wherein a main column blade unit has two prongs longitudinally distributed between the two main columns of the main column blade unit.

3. The converter station jacket according to claim 1, wherein a plurality of reinforcement pipes are connected between the top horizontal trusses and between the bottom horizontal trusses, respectively.

4. The converter station jacket according to claim 1, wherein said main column is spliced from a plurality of cylinders.