Precast concrete tower drum for heat absorption tower and heat absorption tower

Abstract

The utility model relates to a prefabricated concrete tower drum for a heat absorption tower and the heat absorption tower, and belongs to the technical field of power generation. The horizontal section is formed by connecting a plurality of prefabricated sheets; the horizontally-segmented prefabricated sheets which are adjacent up and down are connected in a vertical seam staggered manner; the prefabricated pieces comprise pipe pieces with corbels and common pipe pieces, and the pipe pieces with the corbels and the common pipe pieces are prefabricated arc-shaped pipe pieces formed by concrete pouring. The segment with the bracket is arranged at the mounting position of a to-be-mounted structure, and the common segment is arranged at the non-mounting position; a plurality of bracket embedded parts are arranged on the pipe piece with the bracket, and a structure to be installed is fixed to the bracket embedded parts. The advantages of a concrete structure and a steel structure are considered, installation is convenient and fast, installation precision and efficiency are high, the construction period is short, the reliability of connecting joints is guaranteed, good durability is achieved, the concrete structure part does not need to be subjected to anti-corrosion and fireproof treatment, and maintenance is avoided in the later use process.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation, in particular to a prefabricated concrete tower barrel for a heat absorption tower and a heat absorption tower. Background Art

[0002] Tower molten salt solar thermal power generation is one of the technical routes for solar thermal power generation.

[0003] The power station consists of three major units: solar thermal collection unit, heat storage unit and heat-to-work conversion power generation unit. The first two mainly include concentration, heat absorption, heat storage and heat exchange; the latter includes heat engine, thermal control, electricity, water supply, water production, HVAC and other parts. The function of the heat absorption system is to convert the solar energy collected by the concentrating field into thermal energy of certain parameters, and the thermal energy is safely transported to the heat storage unit and steam turbine of the next process in the form of high-temperature fluid. The heat absorption system of the tower solar thermal power station is a heat absorber, which is set on the top of the high-height heat absorption tower to provide a focusing focus for the vast mirror field.

[0004] The height of the heat absorption tower ranges from about 100m to 250m, and the diameter is about 15m to 25m. It usually adopts cast-in-place concrete structure. During the construction of tower-type solar thermal power stations, affected by the on-site climate conditions and winter construction, the construction of cast-in-place concrete heat absorption towers takes the longest time, usually more than 1 year or even longer, which determines the construction period of the entire solar thermal power station, and then determines the time for grid-connected power generation, affecting the investment return period.

[0005] Compared with concrete structures, steel structures have the characteristics of light weight, high strength, fast construction and installation, etc. However, since the price of steel itself is relatively high and it needs to be treated with anti-corrosion and fire prevention, and regular maintenance is required in the later stage, the overall cost is much higher than that of concrete structures, which limits its scope of use.

[0006] In addition, the heat absorption tower is usually equipped with a conversion truss made of steel structural components, as well as equipment layers, equipment maintenance platforms and other structures supported by steel structural components to meet the functional requirements of the heat absorption tower. The steel components are generally connected to the heat absorption tower through steel embedded parts embedded in the cast-in-place concrete cylinder wall. However, due to the large number of steel embedded parts and the difficulty in positioning, the position accuracy of the embedded parts in the cast-in-place concrete cylinder wall is usually difficult to guarantee, resulting in difficulty in aligning the steel components in the later installation. Measures need to be taken on site to adjust according to the actual situation, which restricts the construction period and reduces the reliability of the connection nodes. Utility Model Content

[0007] In view of the deficiencies in the above-mentioned existing technologies, the present utility model provides a precast concrete tower barrel and a heat absorption tower for a heat absorption tower, which are composed of a combination of precast pieces cast with various concretes, taking into account the advantages of concrete structures and steel structures, with convenient installation, high efficiency, good installation effect, short construction period, good durability, and no need for anti-corrosion and fire-proof treatments, and maintenance-free during the later use process.

[0008] To achieve the above object, the present utility model provides the following technical solutions:

[0009] A precast concrete tower barrel for a heat absorption tower, the tower barrel is a cylindrical slender high-rise structure composed of multiple horizontal segments connected up and down; the horizontal segments are surrounded by multiple precast pieces connected together; the precast pieces of the adjacent horizontal segments above and below are connected in a vertical joint staggered form;

[0010] The precast pieces include corbel segments and ordinary segments, and both the corbel segments and the ordinary segments are precast arc segments formed by concrete casting; the corbel segments are arranged at the installation positions of the structures to be installed, and the ordinary segments are arranged at non-installation positions; multiple corbel embedded parts are provided on the corbel segments, and the structures to be installed are fixed on the corbel embedded parts.

[0011] Further, embedding grooves are respectively provided at the left and right connection ends of a precast piece, pin holes are arranged in the embedding grooves, vertical joint embedded parts are respectively uniformly arranged above and below at the left and right connection ends of the adjacent precast piece, and connecting pins are fixedly connected to the vertical joint embedded parts; when the adjacent precast pieces are assembled, the connecting pins are inserted into the pin holes to be connected in a mortise and tenon form.

[0012] Further, bolt sleeves perpendicular to the axial direction of the pin holes are embedded in the embedding grooves provided with the pin holes; multiple bolt holes perpendicular to the connecting pins are uniformly arranged at intervals at the inner ends of the vertical joint embedded parts, and the adjacent two precast pieces are fixed by screwing the two ends of the connecting bolts into the bolt sleeves and the bolt holes respectively.

[0013] Further, the corbel segment includes a segment and a corbel structure, the corbel structure is arranged inside the segment, and the two are integrally cast by concrete; multiple corbel embedded parts are arranged at intervals on the top of the corbel structure according to installation requirements.

[0014] Further, the corbel embedded parts are fixed on the corbel structure by concrete.

[0015] Further, the structure to be installed is welded on the corbel embedded parts; or slot holes are provided on the corbel embedded parts, and the structure to be installed is fixed on the corbel embedded parts through bolts and the slot holes.

[0016] Furthermore, a backing plate is provided above the corbel embedded part, and the horizontal height of the structure to be installed is adjusted by the backing plates with different thicknesses.

[0017] Furthermore, the concrete is high-strength concrete with a strength grade of C60 - C100, and ordinary steel bars and prestressed steel bars are arranged in the concrete.

[0018] The present utility model also discloses a heat absorption tower, which comprises the precast concrete tower barrel, conversion truss, heat absorber, equipment layer, equipment maintenance platform, staircase and elevator as described in any one of the above; the conversion truss is installed on the segment with corbel at the top of the tower barrel, and the heat absorber is installed on the conversion truss; below the conversion truss, the steel structure support members of multiple equipment layers are respectively installed on the segment with corbel at predetermined intervals, and the equipment to be installed in the heat absorption tower is respectively fixed to the corbel embedded parts on the segment with corbel through the steel structure support members; below the equipment layer inside the tower barrel, the steel structure support members of multiple equipment maintenance platforms are respectively installed on the segment with corbel at predetermined intervals; the staircase and the elevator are arranged inside the tower barrel and communicate with the upper and lower parts of the tower barrel, and the steel structure support members of the staircase and the elevator are respectively connected to the corresponding segments with corbel on the tower barrel.

[0019] The beneficial effects of the present utility model are as follows:

[0020] The precast concrete tower barrel and the heat absorption tower of the present utility model are assembled on site in the form of mortise and tenon joints with precast segments pre-cast with concrete in the factory. The construction speed is fast. Based on the reasonable arrangement of factory production and transportation, the installation period of the tower barrel composed of precast segments can be reduced to about one-tenth of the construction period of the cast-in-situ concrete heat absorption tower, greatly reducing the construction period of the heat absorption tower. In addition, the concrete structure of the precast segments can take into account the advantages of both concrete structures and steel structures. The concrete has a low price, and after adding steel bars, it can have good durability. Except for the exposed steel embedded parts and bolts, the concrete structure part does not need to be treated for anti-corrosion and fire protection, and is maintenance-free during the later use process.

[0021] The precast segments of the present utility model include segments with corbel and ordinary segments. Corbel embedded parts are arranged on the segments with corbel for installation. The steel structure support members are fixed to the corbel embedded parts in the form of welding or bolt connection, and the slot holes arranged on the corbel embedded parts can be used to adjust the installation position of the equipment. Therefore, the precast segments and embedded parts prefabricated in the factory can ensure the installation accuracy and will not reduce the reliability of the connection nodes.

[0022] The precast segments of the present utility model are connected in the way of mortise and tenon joints and fixed by connection bolts. The installation operation is convenient, and on-site wet operations can also be avoided, greatly improving the installation efficiency. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the heat absorption tower of the present utility model;

[0024] Figure 2 It is a schematic diagram of the segment division of the cross-section of the precast concrete tower barrel body for the heat absorption tower of the present utility model;

[0025] Figure 3 It is a plan view of the segment with a corbel and pin holes in the present utility model;

[0026] Figure 4 It is a plan view of the segment with a corbel and vertical joint embedded parts in the present utility model;

[0027] Figure 5 It is a plan view of the ordinary segment with pin holes in the present utility model;

[0028] Figure 6 It is a plan view of the ordinary segment with vertical joint embedded parts in the present utility model;

[0029] Figure 7 It is a sectional view of the vertical joint embedded part in the present utility model;

[0030] Figure 8 It is Figure 3 the sectional view of the precast segment A-A in

[0031] Figure 9 It is Figure 4 the schematic diagram of installing the steel structure member on the segment with a corbel in A-A of

[0032] Wherein: 1-segment with a corbel, 1.1-segment, 1.2-corbel structure, 2-ordinary segment, 3-corbel embedded part, 4-pin hole, 5-vertical joint embedded part, 5.1-bolt hole, 6-connecting pin, 7-bolt sleeve, 8-steel structure support member. Detailed Embodiment

[0033] The following further describes in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings of the specification and the embodiments. The following embodiments are only used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0034] The orientation or positional relationship terms such as up, down, left, right, inside, outside, front end, rear end, head, tail, etc. in this application document are based on the orientation or positional relationship shown in the accompanying drawings. If the accompanying drawings are different, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as a limitation of the protection scope.

[0035] In the present utility model, terms such as "installation", "connection", "engagement", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or a connection capable of mutual communication, a direct connection, or an indirect connection through an intermediate medium. It can be the connection inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] This embodiment describes a precast concrete tower barrel and a heat absorption tower for a heat absorption tower, which takes into account the advantages of concrete structures and steel structures, has good durability, does not require anti-corrosion and fire-proof treatments, is maintenance-free during later use, and has a fast construction speed.

[0037] As Figure 1 and Figure 2 shown, the tower barrel is a tall and slender cylindrical structure composed of multiple precast segments. Horizontally, multiple precast segments form the horizontal sections of the tower barrel, and multiple horizontal sections are connected up and down in a form where vertical joints are staggered to form the tower barrel.

[0038] As Figures 3 to 9 shown, the precast segment includes a corbel segment 1 and a common segment 2. Both the corbel segment 1 and the common segment 2 are precast arc-shaped segments formed by concrete casting. The specifications and dimensions of each single precast segment are comprehensively set according to the specifications of the heat absorption tower, the distribution of equipment inside the tower, the hoisting equipment in the precast factory, road transportation, and on-site installation requirements, etc. And ordinary steel bars and prestressed steel bars are provided in the concrete to meet the requirements of the bearing capacity, deformation, cracks, etc. of the precast segment, enhance the strength of the precast segment, and the prestressed steel bars are also used to connect the upper and lower precast segments. The distribution and quantity of the ordinary steel bars and prestressed steel bars are determined according to the load borne by the precast segment.

[0039] Among them, the corbel segment 1 includes a segment 1.1 and a corbel structure 1.2. The corbel structure 1.2 is arranged inside the segment 1.1, and the two are integrally cast by concrete. The corbel structure 1.2 is an arc-shaped corbel. A plurality of corbel embedded parts 3 are arranged at intervals on the top of the corbel structure 1.2 according to the installation requirements, and the corbel embedded parts 3 are fixed on the corbel structure 1.2 by concrete. During installation, the end of the corresponding structure to be installed is placed on the corbel structure 1.2, and the structure to be installed is fixed on the corbel structure 1.2 by cooperating with the slot holes arranged above the corbel embedded parts 3 through welding or bolts. The bolts can adjust the installation position of the corresponding equipment within a certain range through the slot holes to ensure the installation accuracy of the structure to be installed. Preferably, a backing plate can also be provided on the top of the corbel embedded part 3, and the horizontal height of the structure to be installed can be adjusted by backing plates with different thicknesses.

[0040] In this embodiment, two adjacent precast slabs are connected by a mortise and tenon structure. Embedded part grooves are provided at the left and right connection ends of one precast slab, and a plurality of pin holes 4 are evenly distributed from top to bottom in the embedded part grooves. A plurality of vertical joint embedded parts 5 are evenly distributed from top to bottom at the left and right connection ends of the adjacent precast slab. The vertical joint embedded parts 5 are embedded in the precast slab by concrete. Connecting pins 6 are fixedly connected to the vertical joint embedded parts 5. When adjacent precast slabs are connected, the connecting pins 6 are inserted into the pin holes 4 to form a mortise and tenon connection. In addition, bolt sleeves 7 perpendicular to the axial direction of the pin holes 4 are embedded in the embedded part grooves where the pin holes 4 are provided. A plurality of bolt holes 5.1 perpendicular to the connecting pins 6 are evenly distributed at intervals at the inner ends of the vertical joint embedded parts 5. After two adjacent precast slabs are combined, the two ends of the connecting bolts are respectively screwed into the bolt sleeves 7 and the bolt holes 5.1 to connect the two adjacent precast slabs, strengthening the connection strength between the two adjacent precast slabs and ensuring the connection stability of the adjacent precast slabs. By providing a plurality of bolt holes 5.1 in this embodiment, the connecting bolts can select the bolt holes 5.1 at appropriate positions according to the working conditions, avoiding the problem that connection cannot be achieved due to the obstruction of other installation parts. According to the distribution of the loads of the heat absorption tower, a plurality of through connection holes are distributed on the corresponding precast slabs, and the prestressed steel bars pass through the connection holes and are connected to the upper and lower horizontal segments by prestressed compression.

[0041] The above-mentioned plurality of precast slabs are assembled into the tower barrel of the heat absorption tower according to the design. Compared with the tower barrel currently cast on-site with concrete, the wall thickness of the tower body is thinner and the construction period is shorter.

[0042] For example, in a certain project, the original design used C30 - C40 concrete, the wall thickness of the tower body was 400 - 600 mm, and the local wall thickness at the top was 800 mm. The weight of the heat absorber equipment at the top of the heat absorption tower was about 1000 t - 1800 t, and the stiffness requirement of the heat absorption tower was that the maximum displacement limit at the top of the tower under the action of horizontal loads was H / 300. For the heat absorption tower with the tower barrel of this embodiment, high-strength concrete of C60 - C100 is used, the wall thickness of the tower body is 300 - 450 mm, ordinary steel bars and prestressed steel bar installation holes penetrating up and down are arranged in the precast slabs according to the stress requirements, and each precast slab is connected by a mortise and tenon connection in the form of staggered vertical joints to form the tower barrel.

[0043] In the range of 3 to 5 meters in height at the top of the tower barrel of the heat absorption tower, the transfer truss is installed on the segment with bracket 1. The transfer truss in this embodiment is a steel structure member, and the heat absorber is installed on the transfer truss. In the range of about 25 meters in height below the transfer truss, the steel structure support members 8 for supporting the ends of multiple equipment layers are respectively installed on the segment with bracket 1 at intervals of about 5 meters inside the tower barrel. Each equipment required inside the heat absorption tower is arranged on the equipment layer respectively through the steel structure support member 8 supporting it according to the design. In the tower barrel below the equipment layer, the steel structure support members 8 for supporting the equipment maintenance platform are installed on the segment with bracket 1 at intervals of about 15 meters. There are stairs and elevators connecting up and down inside the tower barrel, and the steel structure support members 8 for fixing the stairs and elevators are respectively fixedly connected to the corresponding segment with bracket 1 on the tower barrel. The stairs, elevators, transfer truss, equipment layer, equipment maintenance platform, etc. are arranged according to the installation requirements. The precast segments at their respective installation positions with the tower barrel respectively adopt the segment with bracket 1, and the bracket embedded parts 3 are fixed by concrete according to the installation requirements. The precast segments at other non-installation positions respectively adopt the ordinary segment 2.

[0044] On the premise of meeting the requirements of equipment layout inside the tower and structural stress, the tower type of the heat absorption tower in this embodiment can be selected according to the mold and overall cost.

[0045] Although the principle of the present invention has been described in detail above in combination with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations of the illustrative implementation manners of the present invention, and do not limit the scope included in the present invention. The details in the embodiments do not constitute a limitation to the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformation and simple replacement based on the technical solution of the present invention all fall within the protection scope of the present invention.

Claims

1. A prefabricated concrete tower for a heat absorption tower, characterized in that: The tower is a cylindrical tall structure composed of multiple horizontal segments connected up and down; the horizontal segments are surrounded by multiple prefabricated sheets; the prefabricated sheets of the upper and lower adjacent horizontal segments are connected in a staggered vertical seam form; The prefabricated segments include a segment with a corbel (1) and an ordinary segment (2), both of which are prefabricated arc-shaped segments formed by pouring concrete; the segment with a corbel (1) is arranged at an installation position of a structure to be installed, and the ordinary segment (2) is arranged at a non-installation position; the segment with a corbel (1) is provided with a plurality of corbel embedded parts (3), and the structure to be installed is fixed on the corbel embedded parts (3).

2. The prefabricated concrete tower for a heat absorption tower according to claim 1, characterized in that: The left and right connecting ends of one of the prefabricated sheets are respectively provided with embedded component grooves, and pin holes (4) are arranged in the embedded component grooves. The left and right connecting ends of the adjacent prefabricated sheets are respectively evenly distributed with a plurality of vertical seam embedded components (5) on the upper and lower sides, and connecting pins (6) are fixed on the vertical seam embedded components (5); when the adjacent prefabricated sheets are assembled, the connecting pins (6) are inserted into the pin holes (4) to connect in the form of mortise and tenon.

3. The prefabricated concrete tower for a heat absorption tower according to claim 2, characterized in that: A bolt sleeve (7) is pre-embedded in the embedded component groove in which the pin hole (4) is arranged and is axially perpendicular to the pin hole (4); a plurality of bolt holes (5.1) are evenly spaced at the inner end of the vertical seam embedded component (5) and are perpendicular to the connecting pin (6); and two adjacent prefabricated sheets are fixed by screwing the two ends of the connecting bolt into the bolt sleeve (7) and the bolt hole (5.1) respectively.

4. The prefabricated concrete tower for a heat absorption tower according to claim 1, characterized in that: The pipe segment with corbels (1) comprises a pipe segment (1.1) and a corbel structure (1.2); the corbel structure (1.2) is arranged on the inner side of the pipe segment (1.1); and the two are integrally cast from concrete; and a plurality of corbel embedded parts (3) are arranged at intervals on the top of the corbel structure (1.2) according to installation requirements.

5. The prefabricated concrete tower for a heat absorption tower according to claim 4, characterized in that: The corbel embedded part (3) is fixed to the corbel structure (1.2) by means of concrete.

6. The prefabricated concrete tower for a heat absorption tower according to claim 1, characterized in that: The structure to be installed is welded to the corbel embedded part (3); or the corbel embedded part (3) is provided with a slot, and the structure to be installed is fixed to the corbel embedded part (3) via bolts and the slot.

7. The prefabricated concrete tower for a heat absorption tower according to claim 1, characterized in that: A pad is provided above the corbel embedded part (3), and the horizontal height of the structure to be installed is adjusted by using the pad of different thicknesses.

8. The prefabricated concrete tower for a heat absorption tower according to claim 1, characterized in that: The concrete is C60-C100 high-grade concrete, and ordinary steel bars and prestressed steel bars are arranged in the concrete.

9. A heat absorption tower, characterized in that: The heat absorption tower comprises a precast concrete tower, a conversion truss, a heat absorber, an equipment layer, an equipment maintenance platform, a staircase and an elevator according to any one of claims 1 to 8; the conversion truss is installed on the corbel segment (1) at the top of the tower, and the heat absorber is installed on the conversion truss; the steel structure support components (8) of the multiple equipment layers below the conversion truss are respectively installed on the corbel segment (1) at predetermined intervals, and the equipment to be installed in the heat absorption tower is respectively fixed to the corbel embedded parts (3) on the corbel segment (1) through the steel structure support components (8); the steel structure support components (8) of the multiple equipment maintenance platforms below the equipment layer inside the tower are respectively installed on the corbel segment (1) at predetermined intervals; the staircase and the elevator are arranged in the tower and connected to the upper and lower parts of the tower, and the steel structure support components (8) of the staircase and the elevator are respectively connected to the corresponding corbel segment (1) on the tower.

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