Shaped reinforcing support for inner wall formwork of small foundation chamber of wind generating set

Abstract

The utility model belongs to the technical field of wind power generation engineering construction equipment, and discloses a finalization reinforcing support for an inner wall formwork of a foundation cell of a wind generating set, which is used for solving the problem of poor concrete forming quality caused by non-uniform stress and easy deformation of the formwork in the existing steel pipe reinforcing mode. The support comprises a base, a bearing stand column and an up-down adjusting sleeve. Wherein the up-and-down adjusting sleeve can freely slide up and down along the bearing stand column and can be adjusted to a proper position through a screw or a nut hole reserved in the stand column, and a fixed pin and a movable pin on the sleeve can achieve positioning and anti-sliding of the steel pipe support. The support is simple in structure, adjustable in installation height, capable of being produced in batches in a standardized mode, capable of being recycled, capable of effectively improving site construction efficiency and shortening the construction period, and suitable for supporting the inner side formwork of a circular-section concrete structure with the radius smaller than 4.5 m.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind power foundation construction technology, specifically relates to a wind generating set foundation small room inner wall formwork's standardization reinforcing support. BACKGROUND

[0002] In recent years, with the development of new energy industry, more and more wind generating sets are put into construction. With product iteration and upgrading, the power generation of wind generating set is larger and larger, and the fan unit is higher and higher. At present, the wind generating set mostly adopts concrete-steel tower structure, the tower adopts in-body prestress technology (i.e. prestress is generated by prestress tendon in the section of tower drum concrete section), and the tower concrete foundation is used as the bottom anchoring end of prestress tension. The middle cavity (or "small room") of the foundation is usually used as the access for subsequent prestress tension or the installation platform of cooling equipment. Because the height of prestress anchoring end concrete is high, the small room facade formwork needs to bear large concrete impact force during pouring.

[0003] In the traditional construction process, the formwork reinforcement is mostly carried out by setting up steel pipe fastener scaffold along the chord direction of the circle, but because the small room is circular, the length of the supporting steel pipe needs to be changed with the adjustment of the net distance between the formworks, and the existing steel pipe scaffold is of fixed size (such as 900mm, 1200mm, etc.), which cannot be flexibly adapted to the formwork reinforcement requirements of small rooms of different diameters. Therefore, the steel pipe needs to be cut during construction, which leads to slow construction speed and time-consuming and laborious erection process. In addition, because the steel pipe support is arranged along the chord direction of the circle, the steel pipe cannot be perpendicular to the formwork surface, which leads to uneven stress on the formwork, and easily causes formwork burst or deformation, resulting in the cross-sectional size deviation of the concrete member exceeding the specification. If the steel pipe fastener scaffold is set up along the radial direction of the circle for reinforcement, due to the size limitation of the steel pipe, only one radial formwork can be reinforced at each level during the erection process, and the facade formwork cannot be uniformly reinforced along multiple stress surfaces, which also leads to uneven stress on the formwork, and easily causes formwork deformation during concrete pouring, thereby affecting the forming quality of the concrete. SUMMARY

[0004] The utility model aims at overcoming the defects of uneven stress on the steel pipe reinforced formwork, easy deformation leading to poor concrete forming quality in the prior art, and provides a wind generating set foundation small room inner wall formwork standardization reinforcing support, which has the advantages of simple structure, convenient construction, material saving, adjustable installation height, recyclable use, suitable for factory standardization processing, low cost and the like. The utility model solves the problems existing in the prior art, and can greatly improve the construction efficiency on site and save the construction period on site.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a standardized reinforcement support for the inner wall template of a small chamber of a wind turbine foundation, which consists of three main parts: a base, a load-bearing column, and an upper and lower adjusting sleeve. The upper and lower adjusting sleeve consists of three parts: a sleeve body, a steel pipe connecting and fixing pin, and an upper and lower adjusting pin (the pin also serves as the steel pipe connection pin).

[0006] The base is made of solid steel plate, and its main function is to ensure the stability of the support and prevent the support from damaging the concrete at the bottom.

[0007] The load-bearing columns are the main stress-bearing components, made of thick-walled hollow steel pipes with a wall thickness of not less than 8mm, capable of withstanding a certain compressive stress. The steel pipes supporting the formwork in each direction are connected at one end to the load-bearing columns via fixed or movable connecting pins of the upper and lower adjusting sleeves. The other end is secured to the formwork stiffening ribs or other force-transmitting structures using a steel pipe support, thereby converting the lateral force transmitted by the formwork into axial force. Four holes with screws or nuts are symmetrically reserved every 150mm along the circumference of the load-bearing columns for fixing with movable connecting pins of the sleeves.

[0008] The adjustable sleeve is a crucial force-transmitting component. Its material is the same as the load-bearing column, with a steel wall thickness of no less than 6mm and a diameter slightly larger than the outer diameter of the load-bearing column to ensure smooth sliding on the column. The steel pipe fixing pins on the adjustable sleeve are evenly and symmetrically arranged at a 30° angle around the sleeve's center to ensure symmetrical transmission of axial force. Each adjustable sleeve has a total of 8 fixing pins and 4 movable pins. The steel pipe fixing pins on the adjustable sleeve are evenly and symmetrically arranged at a 30° angle around the sleeve's center to ensure symmetrical transmission of axial force.

[0009] The fixed connecting pin is used to fix the upper and lower adjusting sleeves; the movable connecting pin is used to fix the upper and lower adjusting sleeves through pre-drilled holes in the load-bearing column. The connecting pin has the dual function of fixing the connection and preventing the vertical slippage of the formwork support steel pipe.

[0010] The adjustable sleeve can slide freely up and down on the load-bearing column, and can be adjusted to a suitable height according to the pre-drilled holes with screws or nuts on the load-bearing column. The fixed pin and movable pin pre-drilled on the adjustable sleeve are used for positioning and preventing slippage of the steel pipe support. After sliding the adjustable sleeve to the target hole position on the load-bearing column as needed, the adjustable sleeve is connected and fixed to the load-bearing column by engaging the movable pin with the pre-drilled hole with screws or nuts on the load-bearing column.

[0011] This utility model adopts the above-mentioned technical solution to address the problem of side reinforcement of formwork with internal chambers in existing wind turbine foundations, and designs a convenient and feasible support system. By setting a base, load-bearing columns, and upper and lower adjusting sleeves, the formwork support can be quickly assembled, positioned, and load-bearing. Installation and disassembly are convenient, and standardized and mass production is possible. By adjusting the height of the upper and lower adjusting sleeves, the spacing of the formwork reinforcement supports can be flexibly adjusted, thereby ensuring that the overturning resistance and overall rigidity of the side formwork supports meet the requirements of relevant design calculations, effectively guaranteeing the stability of the formwork during concrete pouring, and thus ensuring the construction quality of the concrete structure. Attached image description:

[0012] Figure 1 This is a typical cross-section of a concrete-steel tower wind turbine foundation;

[0013] Figure 2 This is a plan view of the foundation of a concrete-steel tower wind turbine generator set;

[0014] Figure 3 This is an overall schematic diagram of the present invention;

[0015] Figure 4 This is an enlarged view of the upper and lower adjusting sleeve of this utility model and its connection with the load-bearing column;

[0016] Figure 5 This is an enlarged view of the upper and lower adjusting sleeve;

[0017] Among them, 1. base; 2. load-bearing column; 3. upper and lower adjusting sleeve; 21. reserved hole for load-bearing column; 31. fixed connecting pin; 32. movable connecting pin; 4. bottom plate of fan foundation chamber. Detailed implementation method:

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] like Figure 3 As shown, a standardized reinforcement support for the inner wall template of a wind turbine foundation includes a base 1 made of steel plate, a load-bearing column 2 made of thick-walled hollow steel pipe, an adjustable sleeve 3 fitted onto the load-bearing column 2 and capable of sliding up and down along it, and a fixing pin 31 and a movable pin 32 disposed on the adjustable sleeve 3. The base 1 and the load-bearing column 2 are fixedly connected by welding. The adjustable sleeve 3 is directly fitted onto the outside of the load-bearing column 2 and can slide freely up and down on the load-bearing column to adjust its height. The fixing pin 31 is directly fixed to the outer wall of the adjustable sleeve 3 by welding. The movable pin 32 is connected to the load-bearing column through pre-drilled holes in the adjustable sleeve 3 and the load-bearing column 2, forming a single unit.

[0020] like Figure 4As shown, the upper and lower adjusting sleeve 3 is fixed on the load-bearing column 2 by the cooperation of the movable pin 32 with the reserved hole on the upper and lower adjusting sleeve 3 and the reserved hole 21 on the load-bearing column.

[0021] Four pre-drilled holes 21 are evenly spaced along the circumference of the same cross-section on the load-bearing column 2, with a longitudinal spacing of 150mm along the column 2, to ensure modular adjustment accuracy during vertical adjustment. The vertical adjustment sleeve 3 has an adjustment stroke of 150mm, which can easily adjust the interlayer spacing of the steel pipe support frame of the support side formwork to ensure that the spacing of the formwork steel pipe support meets the requirements of the design calculation, and has a wide range of applications.

[0022] like Figure 5 As shown, the upper and lower adjusting sleeve 3 is equipped with a total of 12 connecting pins, including 8 fixed connecting pins 31 (evenly distributed between two movable pins 32) and 4 movable connecting pins 32 (at an angular spacing of 90°). The angle between the axis of each connecting pin and the line connecting the center of the adjusting sleeve 3 is 30°, achieving a uniform and symmetrical arrangement to ensure that the axial horizontal force transmitted by the steel pipe support frame can be evenly distributed.

[0023] This utility model mainly uses ordinary solid steel plates, thick-walled hollow steel pipes, steel bars or solid steel bars. The materials are widely available, have high load-bearing capacity, low processing and manufacturing costs, and simple structural design, which is convenient for on-site processing and also suitable for standardized factory production.

[0024] The above description is only a preferred embodiment of the present utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

[0025] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

Claims

1. A standardized reinforcement support for the inner wall template of a small chamber in a wind turbine foundation, characterized in that: It includes a base, a load-bearing column, and an up-and-down adjusting sleeve; the up-and-down adjusting sleeve slides freely up and down on the load-bearing column and can be adjusted to a suitable position according to the pre-drilled holes with screws or nuts on the load-bearing column, and the pre-drilled fixed pins and movable pins on the up-and-down adjusting sleeve are used for positioning and anti-slip of the steel pipe support.

2. The standardized reinforcement support for the inner wall template of the wind turbine foundation as described in claim 1, characterized in that: The holes with screws or nuts pre-drilled on the load-bearing column are evenly distributed along the height of the load-bearing column, and the distance between two adjacent holes is 150mm.

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