CN111677102B - A straddling molten salt pump supporting steel platform and a molten salt pump supporting method - Google Patents
A straddling molten salt pump supporting steel platform and a molten salt pump supporting method Download PDFInfo
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- CN111677102B CN111677102B CN202010506482.3A CN202010506482A CN111677102B CN 111677102 B CN111677102 B CN 111677102B CN 202010506482 A CN202010506482 A CN 202010506482A CN 111677102 B CN111677102 B CN 111677102B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional [3D] framework structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D2020/0047—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material using molten salts or liquid metals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明提供了一种跨越式熔盐泵支撑钢平台及熔盐泵支撑方法，包括立体框架、跨越桁架结构、设备平台层和中间过渡层，立体框架和跨越桁架结构通过梁刚性连接，跨越桁架结构横跨熔盐储罐罐顶，熔盐储罐设置在中间过渡层内，立体框架和跨越桁架结构之间的空间为设备平台层，设备平台层包括异形支座梁和水平支撑系统，异形支座梁包括横向支座梁和纵向支座梁，横向支座梁设于立体框架和跨越桁架结构之间，纵向支座梁设于横向支座梁之间，中间过渡层设于设备平台层下方，异形支座梁固设有熔盐泵底座。本发明通过保证了整体支撑结构的竖向、水平方向的刚度和承载力，并将所有内力传至基础，满足多台熔盐泵高转速下的振动、承载及变形要求。
The present invention provides a straddling molten salt pump support steel platform and a molten salt pump support method, comprising a three-dimensional frame, a spanning truss structure, an equipment platform layer and an intermediate transition layer, wherein the three-dimensional frame and the spanning truss structure are rigidly connected by a beam, the spanning truss structure spans the top of a molten salt storage tank, the molten salt storage tank is arranged in the intermediate transition layer, the space between the three-dimensional frame and the spanning truss structure is the equipment platform layer, the equipment platform layer comprises a special-shaped support beam and a horizontal support system, the special-shaped support beam comprises a transverse support beam and a longitudinal support beam, the transverse support beam is arranged between the three-dimensional frame and the spanning truss structure, the longitudinal support beam is arranged between the transverse support beams, the intermediate transition layer is arranged below the equipment platform layer, and the special-shaped support beam is fixedly provided with a molten salt pump base. The present invention meets the vibration, load-bearing and deformation requirements of multiple molten salt pumps at high speed by ensuring the vertical and horizontal rigidity and bearing capacity of the overall support structure and transmitting all internal forces to the foundation.
Description
Technical Field
The invention belongs to the technical field of structures for supporting large vertical long-axis rotary pumps, and particularly relates to a spanned molten salt pump supporting steel platform and a molten salt pump supporting method.
Background
Along with the great development and application of the new energy technology in China, particularly a heat storage area in a tower type photo-thermal power station, an economic and reliable molten salt pump supporting structure is urgently needed by matching with a molten salt storage tank. At present, the design of a supporting platform of a large-flow and high-lift vertical molten salt pump by taking molten salt as a medium still has the difficulty and the deficiency:
Firstly, a high-flow high-lift vertical molten salt pump provides strict rigidity requirements for a supporting structure of the high-flow high-lift vertical molten salt pump, wherein 1) the matrix requirements of translational rigidity (kN/m) and rotational rigidity (kN.m/rad) of the whole supporting structure are required to be met in the X, Y, Z direction, and 2) when the molten salt pump equipment is installed and leveled, the vertical allowed displacement of the supporting position of a pump support is required to be 0.1mm, and the horizontal allowed displacement of the supporting position is required to be 0.04mm.
Secondly, the supporting structure put into use at home and abroad at present is a cantilever type molten salt pump supporting platform, the cantilever distance of the supporting platform is long, in order to meet the rigidity requirement, the lower part of the platform is mostly a reinforced concrete shear wall, and the upper part of the platform adopts a space supporting steel structure system, so that the construction is complex, and the engineering cost is high.
Disclosure of Invention
The invention aims to provide a spanned molten salt pump supporting steel platform, which overcomes the technical problems in the prior art and meets the high-power generation index of a photo-thermal power station.
The invention further aims to provide a molten salt pump supporting method, which has high vertical and horizontal bearing capacity and good effect of supporting the rotary shaft type pump equipment.
Therefore, the technical scheme provided by the invention is as follows:
The crossing molten salt pump supporting steel platform comprises a three-dimensional frame, a crossing truss structure, an equipment platform layer and an intermediate transition layer, wherein the three-dimensional frame and the crossing truss structure are rigidly connected through a beam, the crossing truss structure crosses the top of a molten salt storage tank, the molten salt storage tank is arranged in the intermediate transition layer, a space between the three-dimensional frame and the crossing truss structure is the equipment platform layer, and the intermediate transition layer is arranged below the equipment platform layer;
The equipment platform layer comprises a special-shaped support beam and a horizontal support system, wherein the special-shaped support beam comprises a transverse support beam and a longitudinal support beam, the transverse support beam is arranged between the three-dimensional frame and the crossing truss structure, the longitudinal support beam is arranged between the transverse support beams, and the special-shaped support beam is fixedly provided with a molten salt pump base.
The three-dimensional frame comprises a longitudinal beam, a cross beam and a steel-concrete composite structural column I, the spanning truss structure comprises a truss girder and a steel-concrete composite structural column II which are rigidly connected, the truss girder comprises an upper chord girder, a lower chord girder and a web member, the web member is arranged between the upper chord girder and the lower chord girder, and the lower chord girder is rigidly connected with the transverse support girder.
The horizontal support system comprises a first horizontal support member and a second horizontal support member, wherein the first horizontal support member is arranged between the cross beams of the three-dimensional frame, the second horizontal support member is arranged between the special-shaped support beams, and the arrangement density of the second horizontal support member is greater than that of the first horizontal support member.
The special-shaped support beam comprises I-steel and an oblique stiffening rib, wherein an upper flange welding end plate of the I-steel forms an upper flange end plate, and the oblique stiffening rib is respectively welded with the upper flange end plate and the lower flange.
Vertical supporting members are arranged between two adjacent steel-concrete composite structure columns I at two ends of the three-dimensional frame and between two adjacent steel-concrete composite structure columns II crossing the truss structure, and are in bidirectional cross shapes, and the vertical supporting members between the steel-concrete composite structure columns I in the middle of the three-dimensional frame are in unidirectional splayed shapes.
The steel-concrete composite structure column I comprises a square steel pipe and concrete, wherein the concrete is arranged on the periphery of the lower portion of the square steel pipe, and the square steel pipe is rigidly connected with the transverse support beam.
The section rigidity of the lower chord steel beam is 2-3 times of that of the upper chord steel beam, and the arrangement position of the web members corresponds to the position of the steel-concrete combined structural column of the three-dimensional frame.
The section rigidity of the vertical supporting member adopting the bidirectional cross shape is 1.5-2 times of that of the vertical supporting member adopting the unidirectional splayed shape.
And the first steel-concrete combined structural column at the end part of the three-dimensional frame and the second steel-concrete combined structural column crossing the end part of the truss structure are obliquely tied through diagonal draw bars.
A molten salt pump supporting method comprises the steps of adopting a crossing molten salt pump supporting steel platform, rigidly connecting two ends of a truss girder lower chord girder of a crossing truss structure with longitudinal girders of a three-dimensional framework, arranging transverse support girders between the middle of the truss girder and the longitudinal girders of the three-dimensional framework, arranging longitudinal support girders between the transverse support girders to form an equipment platform layer, installing a molten salt pump base on the special-shaped support girders, and bearing the vertical bearing capacity and the horizontal bearing capacity of the molten salt pump to realize the supporting of the molten salt pump.
The beneficial effects of the invention are as follows:
according to the spanned molten salt pump supporting steel platform, the main body frame and the spanned truss structure are rigidly connected, so that the rigidity and the bearing capacity of the whole supporting structure in the vertical and horizontal directions are ensured, all internal forces are transmitted to a foundation, and the vibration, bearing and deformation requirements of a plurality of molten salt pumps at high rotating speeds are met.
The horizontal supporting members in the horizontal supporting system arranged on the equipment platform layer are arranged in a manner of being close to a supporting area and being arranged in a manner of being inclined across a big triangle. The vertical supporting members between the steel-concrete composite structural columns I at two ends of the main body frame are in a bidirectional cross shape, the vertical supporting members between the steel-concrete composite structural columns I in the middle are in a unidirectional splayed shape, and the section rigidity of the vertical supporting members at the end parts is 1.5-2.0 times that of the supporting rods in the middle. The arrangement scheme of the horizontal and vertical support system can obviously improve the torsional rigidity in the plane of the platform, and has the advantages of strong integrity and high economy.
The special-shaped support beam is formed by welding I-steel, an upper flange end plate and an inclined stiffening rib, and is directly used for bearing the base of the molten salt pump, and the special-shaped section Liang Youdian is high in torsional rigidity, high in vertical and horizontal bearing capacity and good in effect of supporting the rotary shaft type pump equipment.
According to the invention, the second steel-concrete combined structural column at the end part of the crossing truss structure is obliquely tied with the first steel-concrete combined structural column at the end part of the three-dimensional frame, so that the space integrity of the main body frame is enhanced.
The invention breaks through the adverse factors of the conventional overhanging type supporting platform and well meets the requirements of the molten salt pump on the vertical, horizontal and torsional rigidity of the supporting structure of the molten salt pump. The platform form is attractive and simple in appearance, 90% of the components are made of steel, purchasing and construction are facilitated, the construction period can be obviously shortened compared with other support structure forms, and the construction cost is reduced. The spanning type supporting platform has strong practicability in the engineering field of domestic and foreign photo-thermal power stations and has wide application prospect in the field of heat storage and heat storage of new energy.
In order to make the above-mentioned objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a plan view of one embodiment of the present invention;
FIG. 2 is a plan view of one embodiment of an intermediate transitional layer of the present invention;
FIG. 3 is an elevation view of one embodiment of the subject frame of the present invention;
FIG. 4 is an elevation view of one embodiment of the cross-truss girder structure of the present invention;
FIG. 5 is a plan view of one embodiment of a device platform layer of the present invention;
fig. 6 is a schematic structural view of a profiled abutment beam.
In the figure:
Reference numerals illustrate:
1. The steel-concrete composite structural column comprises a steel-concrete composite structural column body, a horizontal supporting component body, a special-shaped supporting seat beam body, a lower chord steel beam body, a web member body, a vertical supporting component body, a molten salt storage tank body, a square steel pipe body, a welding I-shaped steel body, an upper flange end plate, an inclined stiffening rib body, a steel-concrete composite structural column body, a horizontal supporting component body, a diagonal tension rod body and a diagonal tension rod body.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the cross molten salt pump support steel platform described in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
The embodiment provides a spanning molten salt pump supporting steel platform, which comprises a three-dimensional frame, a spanning truss structure, an equipment platform layer and an intermediate transition layer, wherein the three-dimensional frame and the spanning truss structure are rigidly connected through a beam, the spanning truss structure spans the top of a molten salt storage tank 7, the space between the three-dimensional frame and the spanning truss structure is the equipment platform layer, and the intermediate transition layer is arranged below the equipment platform layer;
The equipment platform layer comprises a special-shaped support beam 3 and a horizontal support system, the special-shaped support beam 3 comprises a transverse support beam and a longitudinal support beam, the transverse support beam is arranged between the three-dimensional frame and the crossing truss structure, the longitudinal support beam is arranged between the transverse support beams, a molten salt storage tank 7 is arranged in the middle transition layer, and a molten salt pump base is fixedly arranged on the special-shaped support beam 3. As shown in fig. 1 and 2.
According to the spanned molten salt pump supporting steel platform, the main body frame and the spanned truss structure are rigidly connected, so that the rigidity and the bearing capacity of the whole supporting structure in the vertical and horizontal directions are ensured, all internal forces are transmitted to a foundation, and the vibration, bearing and deformation requirements of a plurality of molten salt pumps at high rotating speeds are met.
Example 2:
On the basis of the embodiment 1, the embodiment provides a spanned molten salt pump supporting steel platform, wherein the three-dimensional frame comprises a longitudinal beam, a cross beam and a steel-concrete combined structural column I1, the spanned truss structure comprises a truss girder and a steel-concrete combined structural column II 12, the truss girder and the steel-concrete combined structural column II 12 are rigidly connected, the truss girder comprises an upper chord steel girder, a lower chord steel girder 4 and a web member 5, the web member 5 is arranged between the upper chord steel girder and the lower chord steel girder 4, and the lower chord steel girder 4 is rigidly connected with a transverse support girder.
The rigidity and the bearing capacity of the whole supporting structure in the vertical and horizontal directions are ensured through the first steel-concrete combined structural column 1 and the second steel-concrete combined structural column 12, and all internal forces are transmitted to the foundation.
Example 3:
On the basis of embodiment 1, the embodiment provides a spanned molten salt pump support steel platform, the horizontal support system comprises a first horizontal support member 2 and a second horizontal support member 13, the first horizontal support member 2 is arranged between cross beams of a three-dimensional frame, the second horizontal support member 13 is arranged between special-shaped support base beams 3, and the arrangement density of the second horizontal support member 13 is greater than that of the first horizontal support member 2.
As shown in fig. 1, the second horizontal support member 13 arranged on the equipment platform layer is arranged in an encrypted small triangle, and the first horizontal support member 2 arranged on the three-dimensional frame is arranged in an inclined large triangle. The torsional rigidity in the plane of the platform can be obviously improved, and the method has the advantages of strong integrity and high economy.
The sections of the horizontal support member I2 and the horizontal support member II 13 adopt angle steel and H-shaped steel, and the end parts are connected with the cross beam in a hinged mode.
Example 4:
on the basis of embodiment 1, this embodiment provides a span-type molten salt pump support steel platform, dysmorphism saddle beam 3 includes I-steel and slant stiffening rib 11, the top flange welding end plate of I-steel forms top flange end plate 10, slant stiffening rib 11 respectively with top flange end plate 10, bottom flange welding.
In this embodiment, the special-shaped support beam 3 is a special-shaped support beam, as shown in fig. 6, and is composed of welded i-steel 9, an upper flange end plate 10 and an oblique stiffening rib 11, and is directly used for bearing the base of the molten salt pump, and the special-shaped support Liang Youdian has high torsional rigidity, high vertical and horizontal bearing capacity, and good effect of supporting the rotary shaft type pump equipment. One end of the special-shaped support beam (transverse support beam) is rigidly connected with the square steel pipe 8, and the other end is rigidly connected with the lower chord steel beam 4 of the truss beam, and the middle is uninterrupted. Fig. 5 shows a device platform layer consisting of the special-shaped support beams 3 and the horizontal support system.
Example 5:
On the basis of embodiment 2, this embodiment provides a span-type molten salt pump support steel platform, all be equipped with vertical support member 6 between two adjacent steel-concrete composite structure posts 1 at three-dimensional frame both ends and between two adjacent steel-concrete composite structure posts 12 of span truss structure, and all adopt the two-way cross shape, vertical support member 6 between the steel-concrete composite structure posts 1 in the middle of the three-dimensional frame adopts the one-way splayed.
The vertical supporting members 6 are arranged between the adjacent steel columns as shown in fig. 3 and 4, and the general arrangement principle is that two ends of the three-dimensional frame are in a two-way cross shape, and the middle part of the three-dimensional frame is in a one-way splayed shape. The torsional rigidity in the plane of the platform can be obviously improved, and the method has the advantages of strong integrity and high economy.
Example 6:
On the basis of embodiment 2, the present embodiment provides a spanning molten salt pump supporting steel platform, the steel-concrete composite structural column 1 comprises a square steel pipe 8 and concrete, and the concrete is arranged on the periphery of the lower portion of the square steel pipe 8.
As shown in fig. 3, the steel-concrete composite structural column 1 is only arranged below 4.0 meters in height at the bottom and consists of peripheral concrete and square steel pipes 8, so that the rigidity and bearing capacity of the whole supporting structure in the vertical and horizontal directions are ensured, and all internal forces are transmitted to a foundation. And 4.0 meters or more are supported by the square steel pipes 8 only in a height arrangement mode.
As shown in fig. 4, the second steel-concrete composite structural column 12 is only arranged below 4.0 m in height at the bottom, has the same structure as the first steel-concrete composite structural column 1, is composed of peripheral concrete and square steel pipes 8, ensures the rigidity and bearing capacity of the whole supporting structure in the vertical and horizontal directions, and transmits all internal forces to a foundation. And 4.0 meters or more are supported by the square steel pipes 8 only in a height arrangement mode.
Example 7:
On the basis of the embodiment 2, the embodiment provides a spanning molten salt pump supporting steel platform, the section rigidity of the lower chord steel beam 4 is 2-3 times that of the upper chord steel beam, and the arrangement position of the web members 5 corresponds to the first 1 position of the steel-concrete combined structural column of the three-dimensional frame.
As shown in fig. 4, the spanning truss structure comprises a truss girder and two steel-concrete composite structural columns 12 at two sides, wherein the steel truss girder spans the upper part of the top of the molten salt storage tank 7, and two ends of the steel truss girder are supported by the two steel-concrete composite structural columns 12. The upper chord steel beam and the lower chord steel beam 4 of the truss girder are welded I-steel, the web member 5 is a section steel, the section rigidity of the lower chord steel beam 4 is 2.5 times of that of the upper chord steel beam, and the web member 5 is arranged corresponding to the square steel pipe 8 column of the three-dimensional frame. The crossing truss structure should be obliquely tied with the main body structure to strengthen the space integrity of the frame.
Example 8:
on the basis of the embodiment 5, the embodiment provides a spanned molten salt pump supporting steel platform, wherein the cross-shaped vertical supporting member 6 is 1.5-2 times of the section rigidity of the vertical supporting member 6 in a one-way splayed shape.
The arrangement scheme of the vertical supporting member 6 can obviously improve the torsional rigidity in the plane of the platform, and has the advantages of strong integrity and high economy.
Example 9:
On the basis of the embodiment 2, the embodiment provides a spanned molten salt pump supporting steel platform, wherein a steel-concrete combined structural column 1 at the end part of the three-dimensional frame and a steel-concrete combined structural column 12 at the end part of the spanned truss structure are obliquely tied through diagonal draw bars 14.
The crossing truss structure is obliquely tied with the three-dimensional frame, so that the space integrity of the frame is enhanced.
Example 10:
The embodiment provides a molten salt pump supporting method, which adopts a spanning molten salt pump supporting steel platform, after two ends of a truss girder lower chord steel girder 4 of a spanning truss structure are rigidly connected with longitudinal girders of a three-dimensional framework, transverse support beams are arranged between the middle part of the truss girder and the longitudinal girders of the three-dimensional framework, then longitudinal support beams are arranged between the transverse support beams to form an equipment platform layer, a molten salt pump base is arranged on a special-shaped support beam 3 to bear the vertical bearing capacity and the horizontal bearing capacity of the molten salt pump, and the supporting of the molten salt pump is realized.
The invention is matched with the large-diameter molten salt storage tank 7 to well solve the problem of long-term heat storage and heat storage of the photo-thermal power station. The steel frame platform comprises four structural parts, namely a spanning truss girder, a special-shaped foundation girder section, a combined structural column and a supporting system, and the frame platform in the structural form meets the requirements of strength, deformation and shock absorption of a high-flow high-lift molten salt pump supporting structure, and realizes the functions of high-efficiency and stable operation of a cold and hot molten salt pump in a tower type photo-thermal power station. The crossing platform disclosed by the invention not only can solve the problems of resonance, rigidity and the like generated when a plurality of molten salt pumps are operated, but also is suitable for supporting structures of other vertical long-axis pumps, and has certain economical efficiency and practicability.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the invention and that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. The spanned molten salt pump supporting steel platform is characterized by comprising a three-dimensional frame, a spanned truss structure, an equipment platform layer and an intermediate transition layer, wherein the three-dimensional frame and the spanned truss structure are rigidly connected through a beam, the spanned truss structure spans the tank top of a molten salt storage tank (7), the molten salt storage tank (7) is arranged in the intermediate transition layer, the space between the three-dimensional frame and the spanned truss structure is the equipment platform layer, and the intermediate transition layer is arranged below the equipment platform layer;
The equipment platform layer comprises special-shaped support beams (3) and a horizontal support system, wherein the special-shaped support beams (3) comprise transverse support beams and longitudinal support beams, the transverse support beams are arranged between the three-dimensional frame and the crossing truss structure, the longitudinal support beams are arranged between the transverse support beams, and a molten salt pump base is fixedly arranged on the special-shaped support beams (3);
The horizontal support system comprises a first horizontal support member (2) and a second horizontal support member (13), wherein the first horizontal support member (2) is arranged between the cross beams of the three-dimensional frame, the second horizontal support member (13) is arranged between the special-shaped support base beams (3), and the arrangement density of the second horizontal support member (13) is greater than that of the first horizontal support member (2);
The special-shaped support beam (3) comprises I-steel and inclined stiffening ribs (11), wherein an upper flange welding end plate of the I-steel forms an upper flange end plate (10), and the inclined stiffening ribs (11) are respectively welded with the upper flange end plate (10) and the lower flange.
2. The spanned molten salt pump support steel platform of claim 1, wherein the three-dimensional frame comprises a first longitudinal beam, a cross beam and a first steel-concrete combined structural column (1), the spanned truss structure comprises a truss girder and a second steel-concrete combined structural column (12), the truss girder and the second steel-concrete combined structural column (12) are rigidly connected, the truss girder comprises an upper chord steel girder, a lower chord steel girder (4) and web members (5), the web members (5) are arranged between the upper chord steel girder and the lower chord steel girder (4), and the lower chord steel girder (4) is rigidly connected with a transverse support girder.
3. The spanned molten salt pump supporting steel platform as claimed in claim 2, wherein vertical supporting members (6) are respectively arranged between two adjacent steel-concrete composite structural columns I (1) at two ends of the three-dimensional frame and between two adjacent steel-concrete composite structural columns II (12) of the spanned truss structure, and are in bidirectional cross shapes, and the vertical supporting members (6) between the steel-concrete composite structural columns I (1) in the middle of the three-dimensional frame are in one-way splayed shapes.
4. The crossing molten salt pump support steel platform as claimed in claim 2, wherein the steel-concrete composite structural column I (1) comprises a square steel pipe (8) and concrete, wherein the concrete is arranged on the periphery of the lower part of the square steel pipe (8), and the square steel pipe (8) is rigidly connected with a transverse support beam.
5. The spanned molten salt pump supporting steel platform as claimed in claim 2, wherein the section rigidity of the lower chord steel beam (4) is 2-3 times that of the upper chord steel beam, and the arrangement position of the web members (5) corresponds to the position of the steel-concrete combined structural column 1 of the three-dimensional frame.
6. A spanned molten salt pump supporting steel platform as claimed in claim 3, wherein the vertical support member (6) in the shape of a double-sided cross is 1.5-2 times the cross-sectional stiffness of the vertical support member (6) in the shape of a single-sided splay.
7. The spanned molten salt pump supporting steel platform as claimed in claim 2, wherein the first steel-concrete composite structural column (1) at the end part of the three-dimensional frame and the second steel-concrete composite structural column (12) at the end part of the spanned truss structure are obliquely tied through diagonal draw bars (14).
8. A molten salt pump supporting method adopts the spanning molten salt pump supporting steel platform according to claim 1, and is characterized in that after two ends of a truss girder lower chord steel girder (4) of a spanning truss structure are rigidly connected with longitudinal girders of a three-dimensional framework, a transverse support girder is arranged between the middle part of the truss girder and the longitudinal girders of the three-dimensional framework, then a longitudinal support girder is arranged between the transverse support girders to form an equipment platform layer, a molten salt pump base is arranged on a special-shaped support girder (3), and the vertical bearing capacity and the horizontal bearing capacity of the molten salt pump are borne, so that the molten salt pump is supported.
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