Concrete duct piece hoisting and connecting tool

Abstract

The utility model relates to a concrete segment hoisting and connecting tool, which is mounted at a vertical joint surface of a cylinder segment of a horizontal joint surface of a tower cylinder segment, and comprises a bottom plate, a positioning bolt hole, a side edge fixing plate, a connecting plate, a connecting rod, a connecting rod, a connecting rod and a connecting rod, and is characterized in that the bottom plate is provided with the positioning bolt hole, and the end part of the bottom plate is fixedly connected with the side edge fixing plate; a base plate is installed at the positioning screw hole, and fixing bolts are arranged in the positioning screw hole and the base plate. Compared with the prior art, the utility model has the advantages of low price, simple and reliable structure, convenience in installation and reusability, can effectively solve the problems of stress concentration at the vertical abutted seam, shear fracture of anchor bolts, slab staggering of adjacent barrel pieces and the like caused by uneven stress of the barrel pieces in the hoisting construction process of the tower barrel section, improves the connection strength of the vertical abutted seam, and reduces the construction cost. And the slab staggering phenomenon between the adjacent barrel pieces is restrained, the hoisting construction difficulty is reduced, the life cycle maintenance cost of the fan tower barrel is reduced, and obvious technical and economic advantages are achieved.

Description

Technical Field

[0001] This utility model relates to the field of wind power tower technology, and in particular to a concrete segment hoisting and connection tool. Background Technology

[0002] Wind turbine towers are an important component of wind turbine generator sets. In recent years, high hubs and long blades have become the trend in wind turbine development, and the requirements for tower size and performance have gradually increased. Concrete towers have technical and economic advantages such as high structural rigidity, adjustable frequency, good fatigue resistance and easy transportation, and have been widely used.

[0003] Concrete tower sections are assembled in sections to reduce the size of the assembled components, facilitating the prefabrication, transportation, and hoisting of concrete sections. However, due to limitations in bolt connection methods and construction techniques, uneven stress occurs on the sections during hoisting, leading to stress concentration at vertical joints. This causes bolts used for connection to break, resulting in localized defects and quality issues such as section misalignment and detachment, threatening the safety of wind turbine construction and operation.

[0004] The conventional methods to solve this problem are: increasing the number and strength of bolts between horizontal joints, setting vertical concave and convex blocks for splicing the cylinder segments, and pre-embedded steel bars for in-situ casting. However, the method of setting concave and convex blocks for splicing results in a more complex splicing structure, requiring the additional prefabrication of corresponding splicing bosses, splicing holes, and positioning grooves on the tower precast components. The installation process before hoisting is quite cumbersome, and the components cannot be reused after hoisting. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the existing technology and provide a concrete segment hoisting and connection tool.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A concrete segment hoisting and connection fixture, installed at the vertical joint surface of the segment division on the horizontal joint surface of a tower section, includes:

[0008] The base plate has positioning bolt holes machined on it, and the end of the base plate is fixedly connected to the side fixing plate;

[0009] The positioning screw hole is equipped with a mounting plate and a fixing bolt is provided inside the positioning screw hole and the mounting plate.

[0010] As a preferred technical solution, the side fixing plate is provided on one side of the base plate, or the side fixing plate is provided on both sides of the base plate.

[0011] As a preferred technical solution, the cross-sections of the base plate and the side fixing plate are arc-shaped, corresponding to the cross-sections of the tower segment.

[0012] As a preferred technical solution, the bottom plate has a rectangular cross-section, and the width of the rectangle is greater than the width of the cross-section of the tower section.

[0013] As a preferred technical solution, the side fixing plate is arranged on the side of the bottom plate away from the cylinder, and the bottom of the side fixing plate is welded and fixed to the end of the bottom plate.

[0014] As a preferred technical solution, a reinforcing rib is provided between the side fixing plate and the bottom plate.

[0015] As a preferred technical solution, the fixing bolt is a chemical anchor.

[0016] As a preferred technical solution, the wall surface of the hoisting connection fixture is coated with a flexible material to reduce vibration and stress levels.

[0017] As a preferred technical solution, the bolt holes on the base plate are oblong holes.

[0018] As a preferred technical solution, two pads are provided, located on both sides of the vertical joint surface of the cylindrical segment.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) Improve the connection strength of vertical joint surfaces, especially the top, to transfer uneven stress between the tube segments during hoisting construction and alleviate stress concentration at vertical joints.

[0021] 2) To constrain the tendency of misalignment between adjacent cylinders during hoisting, thereby improving the fault tolerance rate and construction efficiency of hoisting construction and saving construction time.

[0022] 3) The hoisting and connection tooling has advantages such as simple and reliable design, convenient manufacturing and construction, recyclability and convenient spare parts. It can effectively avoid or reduce common quality problems at the joints of concrete wind turbine towers, reduce the maintenance cost of wind turbine towers throughout their life cycle, and has significant technical and economic advantages. Attached Figure Description

[0023] Figure 1 This is an exploded view of the structure of the hoisting and connecting tooling of this utility model;

[0024] Figure 2 This is a structural schematic diagram of one embodiment of the hoisting and connecting fixture of this utility model.

[0025] Figure 3 This is a schematic diagram of the installation of the hoisting and connecting tooling and the precast concrete tower of this utility model;

[0026] Figure 4This is a partial enlarged view of the installation of the hoisting and connecting tool and the precast concrete tower of this utility model;

[0027] The following are labeled in the diagram: 1. Base plate; 2. Side fixing plate; 3. Pad plate; 4. Fixing bolts; 5. Lifting and connecting fixtures; 6. Tower section; 7. Vertical joint surface of the tower section; 8. Horizontal joint surface of the tower segment. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] Example 1

[0032] This utility model provides a hoisting and connection fixture for precast concrete cylindrical segments, such as... Figure 1 As shown, positioning bolt holes are machined on the surface of the steel base plate 1. The ends of both sides of the steel base plate 1 are connected to the side fixing plates 2 by welding to form a joint connection and fixing structure. The joint connection and fixing structure is installed on the vertical joint surface 7 above the horizontal joint surface 8 of the tower segment, and the pad 3 and bolt hole 4 are installed at the reserved positioning bolt holes to form the hoisting connection tooling 5. The tower segment is hoisted, and the connection tooling 5 is removed and retrieved on the construction platform. Epoxy structural adhesive is applied. After all vertical splicing is completed, prestress is applied to form the wind turbine tower segment as a whole under stress. A connecting channel steel plate is set at the top horizontal joint of each tower segment to transfer uneven stress between the segments. This can effectively solve the problems of stress concentration at the top of the vertical splice 7 during the hoisting construction of the tower segment, which leads to shear breakage of anchor bolts and misalignment of adjacent segments. It reduces the difficulty of hoisting construction and reduces the maintenance cost of the wind turbine tower throughout its life cycle, and has obvious technical and economic advantages.

[0033] This utility model also has the following optional features.

[0034] Optionally, the bolts used for anchoring are chemical anchors.

[0035] Optionally, the side fixing plate 2 may be provided on only one side of the steel base plate 1 or on both sides of the steel base plate 1.

[0036] Optionally, the cross-sections of the steel base plate 1 and the side fixing plate 2 are arc-shaped, corresponding to the cross-section of the cylindrical section.

[0037] Optionally, the steel base plate 1 and the side fixing plate 2 have rectangular cross-sections, with the width of the rectangle slightly larger than the cross-sectional width of the cylindrical segment. The spacing between the side fixing plates 2 is slightly larger than the width of the cylindrical segment, allowing the connecting and fixing structure to be fitted onto the outside of the cylindrical segment and to accommodate cylindrical segments of various curvatures, facilitating the reuse of hoisting and connecting fixtures.

[0038] Optionally, the side fixing plate 2 is arranged on the side of the steel base plate 1 away from the cylinder segment, and the side fixing plate 2 is welded and fixed to the end of the steel base plate 1. Fixing the side fixing plate 2 above the steel base plate 1 will not interfere with the cylinder segment, so that the lifting fixture can be adapted to almost all cylinder segments.

[0039] Optionally, the outer and inner surfaces of the connecting tooling are coated with a flexible material to reduce vibration and stress levels.

[0040] Optionally, the bolt holes pre-drilled on the surface of the steel base plate can be elongated holes for easy and flexible positioning.

[0041] Optionally, a reinforcing rib is provided between the side fixing plate 2 and the steel base plate 1.

[0042] Optionally, the pad 3 is divided into two parts, located on both sides of the vertical joint surface 7 of the cylindrical segment.

[0043] The following will explain the specific implementation process of the above-mentioned precast concrete tower segment hoisting and connection fixtures:

[0044] like Figure 2 As shown, positioning bolt holes are machined on the surface of the steel base plate 1. The end of the base plate is connected to the side fixing plate 2 by welding to form a channel-shaped steel plate. The channel-shaped steel plate is installed at the vertical joint surface 7 of the segment division on the horizontal joint surface 8 of the tower section, and the pad 3 and fixing bolt 4 are installed at the reserved positioning bolt holes to form the hoisting connection fixture 5. The tower sections are hoisted sequentially according to their numbers. After the hoisting connection fixture is removed on the construction platform, epoxy structural adhesive is applied. After the tower sections are overlapped, prestress is applied to form a whole wind turbine tower section under stress.

[0045] The dimensions of the bottom steel plate 1 are generally: 550mm in length and 16mm in thickness. The width is adjusted according to the thickness of the cylinder wall, and oblong anchor bolt holes are set at both ends of the surface.

[0046] After the hoisting and connecting fixture 5 is manufactured, it should be inspected as a whole. The surface should be clean and continuous, without cracks or damage.

[0047] like Figure 3-4As shown, the tower segments 6 and the hoisting connection fixtures 5 should be pre-assembled. They should be numbered according to the segment size, wall thickness, and width of the connection fixtures, and pre-assembled on the splicing platform. Based on the segment number, the corresponding tower segments 6 are hoisted and placed on the splicing platform. Before assembling the vertical joint surfaces 7 of the segments, the tower segments 6 are adjusted to their predetermined positions on the splicing fixtures, and their positions are further adjusted according to site conditions to ensure uniform joints in the tower segments 6.

[0048] Structural adhesive is evenly applied to 7 vertical joint surfaces of the cylindrical segments, and adjacent ring segments are connected by hand rod bolts. Lifting and connecting fixtures are horizontally installed on the top of the vertical joint surfaces 7 of the cylindrical segments and anchored by chemical anchors.

[0049] After a single tower section is hoisted, the hoisting and connecting fixture 5 should be promptly removed and retrieved from the construction platform, and structural adhesive should be applied to the horizontal joint 8 of the tower section.

[0050] After all segments are hoisted and installed, the steel strands are tensioned and prestressed to form the entire wind turbine tower.

[0051] This utility model is not limited to the specific embodiments described above. The connecting fixture can be manufactured on-site or prefabricated in a factory, and its specific size and shape can be adjusted as needed. The number, position and form of the bolts used for fixing can be adjusted according to the construction conditions and anchoring effect.

[0052] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A concrete segment hoisting and connection fixture, installed at the vertical joint surface (7) of the segment division on the horizontal joint surface (8) of a tower section, characterized in that, include: The base plate (1) has positioning bolt holes machined on it, and the end of the base plate (1) is fixedly connected to the side fixing plate (2); A pad (3) is installed at the positioning bolt hole, and a fixing bolt (4) is provided in the positioning bolt hole and the pad (3).

2. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The side fixing plate (2) is set on one side of the base plate (1), or the side fixing plate (2) is set on both sides of the base plate (1).

3. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The cross-sections of the base plate (1) and the side fixing plate (2) are arc-shaped, corresponding to the cross-sections of the tower segments.

4. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The bottom plate (1) has a rectangular cross-section, and the width of the rectangle is greater than the width of the cross-section of the tower section.

5. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The side fixing plate (2) is arranged on the side of the bottom plate (1) away from the cylinder, and the bottom of the side fixing plate (2) is welded and fixed to the end of the bottom plate (1).

6. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, A reinforcing rib is provided between the side fixing plate (2) and the bottom plate (1).

7. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The fixing bolt (4) is a chemical anchor.

8. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The walls of the hoisting connection fixture are coated with a flexible material to reduce vibration and stress levels.

9. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, The bolt holes on the base plate (1) are oblong holes.

10. The concrete segment hoisting and connection fixture according to claim 1, characterized in that, Two pads (3) are provided, located on both sides of the vertical joint surface (7) of the cylindrical segment.

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