CN-115853714-B - Method for positioning and assembling transition section of prestress framework type wind tower

Abstract

The invention discloses a method for positioning and assembling a prestressed framework type wind tower transition section, which comprises the steps of amplifying a sample on the ground, defining a center point O, making a transverse center line and a longitudinal center line on the ground, adjusting the height difference and inclination deviation of 4 stand pipes for auxiliary assembly by using a level gauge and a theodolite, and the heights of 4 hydraulic jack base clamping jigs, ensuring that the deviation of the center of a tower body is not more than 1mm, ensuring that the height deviation is not more than 1mm, adopting a device with simple structure and low cost, facilitating the operation of the assembly method, greatly improving the working efficiency and effectively reducing the production cost.

Inventors

• ZHANG LONGGANG
• WANG TONGHUA
• ZHANG QIANG
• YANG ZHANBEI
• LI ZHI

Assignees

• 青岛中天斯壮科技有限公司

Dates

Publication Date

20260505

Application Date

20221226

Claims (5)

1. 1. A method for positioning and assembling a prestressed framework type wind tower transition section is characterized in that the transition section comprises a left half part, a right half part and a butt flange, wherein the left half part and the right half part are symmetrically assembled, the butt flange is assembled below the left half part and the right half part, the left half part comprises a left top flange, a left arc panel, a left side panel, a left front panel and a stand column, the right half part comprises a right top flange, a right arc panel, a right side panel, a right front panel and a stand column, the method for positioning and assembling the components of the transition section comprises the steps of (1) amplifying samples on the ground, determining a central point O, making a transverse center line and a longitudinal center line on the ground, adjusting the height difference and inclination deviation of 4 auxiliary assembling risers by adopting a level gauge and a theodolite, ensuring that the deviation of the center of a tower body is not more than 1mm, the height deviation is not more than 1mm, (2) fixing the left top flange and the right top flange on a top fixing bracket, (3) fixing the left top flange and the top flange on the top fixing bracket, (4) fixing the top flange on an inner tube, fixing the top flange on the top fixing bracket by lifting bracket, and installing the top flange on the top by lifting bracket and lifting sleeve, and lifting the top flange by adjusting the height by lifting bolts, adjusting the height of the top flange and the lifting sleeve to be correspondingly arranged in the lifting bracket, and lifting the lifting flange by adjusting the lifting flange, fixing plumb lines on 2A datum points and 2B datum points of a top flange fixing bracket, and repeatedly adjusting the turnbuckle rods in four directions to enable the tips of plumbs in the four directions to be aligned with a transverse center line and a longitudinal center line, so that a center point O is ensured to coincide with the center of a tower; the heights of 4 hydraulic jacks are adjusted, 2A datum points and 2B datum points of a top flange fixing bracket are observed by a water level gauge and a theodolite, the heights of a left top flange and a right top flange are adjusted to be corresponding heights, after the heights and the center overlap ratio are adjusted, a locking nut is used for locking a flange pull rod to ensure the positions of the left top flange and the right top flange to be fixed; And after the left top flange and the right top flange are positioned by using positioning pins, the left top flange and the right top flange are fixed on the top flange fixing bracket by using bolts.
2. 2. The method for positioning and assembling the transition section of the prestressed framework type wind tower according to claim 1, wherein the top flange fixing bracket is provided with a circular flange plate and a cross bracket, flange bracket holes are formed in the circumference of the circular flange plate, and bracket connecting holes are formed in the cross bracket.
3. 3. The method for positioning and assembling a transition section of a prestressed framework type wind tower according to claim 1, wherein a top bracket connecting hole is formed in the top of the bracket.
4. 4. The method for positioning and assembling the transition section of the prestressed framework type wind tower according to claim 1, wherein the outer wall of the lifting inner pipe is finished, and the inner wall of the lifting outer sleeve is finished.
5. 5. The method for positioning and assembling the transition section of the prestressed framework type wind tower according to claim 1, wherein a pull plate is welded to the centers of all four cross bars at the uppermost end of the bracket, the pull plate is connected with a turnbuckle pull rod, the lower end of the turnbuckle pull rod is connected with a pull rod seat on the ground, and a turnbuckle is arranged at the part, close to the ground, below the turnbuckle pull rod for adjusting the length of the pull rod and further adjusting the position of the bracket.

Description

Method for positioning and assembling transition section of prestress framework type wind tower Technical Field The invention belongs to the technical field of wind tower assembly, and particularly relates to a method for positioning and assembling a prestressed framework type wind tower transition section. Background In recent years, with the continuous development of wind tower technology, the power of a fan is continuously increased, and the height of a wind tower is higher and higher. The prestress framework type wind tower consists of a prestress tower, a transition section, a traditional tower barrel and the like, wherein the prestress tower is connected with the lower part of the transition section of the wind tower, and the traditional tower barrel is connected with the upper part of the transition section of the wind tower. The transition section is not an integral part but is assembled from several parts in a factory. Because the transition section part span is great, and the height is higher, hardly satisfies flange plane and ground straightness and is not more than 2mm, and flange center and tower body center overlap ratio are not more than 2 mm's technical requirement, and traditional assembly method hardly guarantees its straightness and overlap ratio, like overlap ratio and straightness deviation are great, and stability and security that will probably cause very big influence for whole tower body. Disclosure of Invention In order to overcome the technical problems in the prior art, the invention aims to provide a method for positioning and assembling a prestressed framework type wind tower transition section, which effectively solves the problems that the deviation of the overall verticality and the axis superposition degree is large and the technical requirement is difficult to meet during assembly. The invention provides a method for positioning and assembling a prestressed framework type wind tower transition section, which comprises a left half part, a right half part and a butt flange, wherein the left half part and the right half part are symmetrically assembled and arranged, the butt flange is assembled and arranged below the left half part and the right half part, the left half part comprises a left top flange, a left arc panel, a left side panel, a left front panel and an upright post, the right half part comprises a right top flange, a right arc panel, a right side panel, a right front panel and an upright post, the method for positioning and assembling the components of the transition section comprises the steps of (1) amplifying samples on the ground, determining a central point O, making a transverse center line and a longitudinal center line on the ground, adjusting the height difference and inclination deviation of 4 auxiliary assembling risers by adopting a level gauge and a theodolite, ensuring that the deviation of the center of a tower body is not more than 1mm, the height deviation is not more than 1mm, (2) fixing the left top flange and the right top flange on a top fixing bracket, (3) fixing the left top flange and the top flange on the top fixing bracket, (4) fixing the top flange on the top flange by pushing the left top flange and the top flange on the top fixing bracket, and the top flange by using a lifting jack, and lifting bolt to adjust the height of the top flange by lifting bracket, and installing the lifting sleeve in the lifting bracket by lifting sleeve to the lifting bracket and lifting sleeve to the lifting bracket by adjusting the height by the lifting flange and lifting the lifting sleeve to the lifting flange correspondingly, adjusting the height by lifting flange, the method comprises the steps of fixing plumb lines on 2A datum points and 2B datum points of a top flange fixing bracket, repeatedly adjusting a flange pull rod in four directions to enable the tips of plumbs in the four directions to be aligned with a transverse center line and a longitudinal center line, thereby ensuring that a center point O coincides with the center of a tower, adjusting the heights of 4 hydraulic jacks, observing 2A datum points and 2B datum points of the top flange fixing bracket by using a water level gauge and a theodolite, adjusting the heights of left and right top flanges to corresponding heights, locking the flange pull rod by using a locking nut after the heights and the center overlap ratio are adjusted, ensuring that the positions of the left and right top flanges are fixed, and hoisting a left arc panel, a left side panel, a left front panel, a right arc panel, a right front panel and a butt flange to corresponding positions for assembly, marking after assembly welding, wherein the components are not interchangeable with other components. And after the left top flange and the right top flange are positioned by using positioning pins, the left top flange and the right top flange are fixed on the top flange fixing bracket by using bolts. The top flange fixing