A straddling molten salt pump supporting steel platform and a molten salt pump supporting method

Abstract

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

[0001] The invention belongs to the technical field of structures supporting large vertical long-axis rotating pumps, and in particular relates to a straddling molten salt pump supporting steel platform and a molten salt pump supporting method. Background Art

[0002] With the country's vigorous development and application of new energy technologies, especially the heat storage and exchange area in tower-type solar thermal power stations, an economical and reliable molten salt pump support structure is urgently needed to match the molten salt storage tank. At present, there are still difficulties and shortcomings in the design of a vertical molten salt pump support platform with molten salt as the medium, large flow rate and high head:

[0003] First, large-flow, high-lift vertical molten salt pumps have strict stiffness requirements for their supporting structures: 1) The overall supporting structure must meet the translational stiffness (kN / m) and rotational stiffness (kN.m / rad) matrix requirements in the X, Y, and Z directions; 2) When installing and leveling the molten salt pump equipment, the vertical displacement of the pump support is required to be 0.1mm and the horizontal displacement is required to be 0.04mm.

[0004] Second, the supporting structures currently used at home and abroad are all cantilevered molten salt pump supporting platforms. This type of supporting platform has a long cantilever distance. In order to meet the stiffness requirements, the lower part of the platform is mostly reinforced concrete shear walls, and the upper part adopts a spatial support steel structure system, which leads to complex construction and high project costs. Summary of the invention

[0005] The purpose of the present invention is to provide a straddle-type molten salt pump support steel platform to overcome the above-mentioned technical problems existing in the prior art and meet the high-power power generation indicators of a solar thermal power station.

[0006] Another object of the present invention is to provide a molten salt pump supporting method, which has high vertical and horizontal bearing capacity and good effect of supporting a rotating shaft pump equipment.

[0007] To this end, the technical solution provided by the present invention is as follows:

[0008] A spanning molten salt pump support steel platform 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 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, and the intermediate transition layer is arranged below the equipment platform layer;

[0009] The equipment platform layer includes special-shaped support beams and a horizontal support system. The special-shaped support beams include transverse support beams and longitudinal support beams. The transverse support beams are arranged between the three-dimensional frame and the spanning truss structure, and the longitudinal support beams are arranged between the transverse support beams. The special-shaped support beams are fixed with a molten salt pump base.

[0010] The three-dimensional frame includes a longitudinal beam, a transverse beam and a steel-concrete composite structure column 1, the spanning truss structure includes a truss beam and a steel-concrete composite structure column 2, and the truss beam and the steel-concrete composite structure column 2 are rigidly connected; the truss beam includes an upper chord steel beam, a lower chord steel beam and a web member, the web member is arranged between the upper chord steel beam and the lower chord steel beam, and the lower chord steel beam is rigidly connected to the transverse support beam.

[0011] The horizontal support system includes horizontal support member 1 and horizontal support member 2. The horizontal support member 1 is arranged between the cross beams of the three-dimensional frame, and the horizontal support member 2 is arranged between the special-shaped support beams. The arrangement density of the horizontal support member 2 is greater than that of the horizontal support member 1.

[0012] The special-shaped support beam comprises an I-beam and oblique stiffening ribs. The upper flange of the I-beam is welded to an end plate to form an upper flange end plate. The oblique stiffening ribs are respectively welded to the upper flange end plate and the lower flange.

[0013] Vertical support members are provided between two adjacent steel-concrete composite structure columns 1 at both ends of the three-dimensional frame and between two adjacent steel-concrete composite structure columns 2 spanning the truss structure, and both are in a two-way cross shape. The vertical support members between the steel-concrete composite structure columns 1 in the middle of the three-dimensional frame are in a one-way figure eight shape.

[0014] The steel-concrete composite structural column 1 comprises a square steel tube and concrete, wherein the concrete is arranged on the lower periphery of the square steel tube, and the square steel tube is rigidly connected to the transverse support beam.

[0015] The cross-sectional stiffness of the lower chord steel beam is 2-3 times that of the upper chord steel beam, and the arrangement position of the web member corresponds to a position of a steel-concrete composite structural column of the three-dimensional frame.

[0016] The cross-sectional stiffness of the vertical support member using a bidirectional cross shape is 1.5-2 times that of the vertical support member using a unidirectional figure eight shape.

[0017] The first steel-concrete composite structure column at the end of the three-dimensional frame and the second steel-concrete composite structure column across the end of the truss structure are connected diagonally by diagonal tie rods.

[0018] A molten salt pump supporting method adopts a spanning molten salt pump supporting steel platform, after rigidly connecting the two ends of the lower chord steel beam of the truss beam of the spanning truss structure with the longitudinal beam of the three-dimensional frame, a transverse support beam is arranged between the middle part of the truss beam and the longitudinal beam of the three-dimensional frame, and then a longitudinal support beam is arranged between the transverse support beams to form an equipment platform layer, and a molten salt pump base is installed on the special-shaped support beam to bear the vertical bearing capacity and horizontal bearing capacity of the molten salt pump, so as to realize the support of the molten salt pump.

[0019] The beneficial effects of the present invention are:

[0020] The straddling molten salt pump supporting steel platform provided by the present invention is rigidly connected by the main frame and the straddling truss structure, thereby ensuring the vertical and horizontal stiffness and bearing capacity of the overall supporting structure, and transmitting all internal forces to the foundation, thereby meeting the vibration, bearing and deformation requirements of multiple molten salt pumps at high speeds.

[0021] The arrangement principle of the horizontal support members in the horizontal support system of the equipment platform layer of the present invention is as follows: the "densified small triangle" arrangement is adopted near the support area; the "diagonal large triangle" arrangement is adopted far away from the support area. The vertical support members between the steel-concrete composite structure columns at both ends of the main frame adopt a two-way cross shape, and the vertical support members between the steel-concrete composite structure columns in the middle adopt a one-way figure eight shape, and the cross-sectional stiffness of the end vertical support members is 1.5 to 2.0 times that of the middle support rods. This arrangement scheme of the horizontal and vertical support system can significantly improve the torsional stiffness within the platform plane, and has the advantages of strong integrity and high economy.

[0022] The special-shaped support beam of the present invention is composed of welded I-beams, upper flange end plates and oblique stiffening ribs, and directly bears the base of the molten salt pump. This special-shaped cross-section beam has the advantages of large torsional rigidity, high vertical and horizontal bearing capacity, and good effect of supporting rotating shaft pump equipment.

[0023] The second steel-concrete composite structure column at the end of the spanning truss structure of the present invention is obliquely connected to the first steel-concrete composite structure column at the end of the three-dimensional frame, thereby strengthening the spatial integrity of the main frame.

[0024] The present invention breaks through the disadvantages of conventional cantilever support platforms and satisfies the vertical, horizontal and torsional stiffness requirements of the molten salt pump for its support structure. The platform is beautiful and simple in shape, and 90% of the components are made of steel, which is easy to purchase and construct. Compared with other support structure forms, it can significantly shorten the construction period and reduce the project cost. The leap-forward support platform of the present invention has strong practicality in the field of solar thermal power station engineering at home and abroad, and has broad application prospects in the field of new energy heat storage and thermal storage.

[0025] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a plan view of an embodiment of the present invention;

[0027] Figure 2 It is a plan view of an embodiment of the intermediate transition layer of the present invention;

[0028] Figure 3It is an elevation view of an embodiment of the main frame of the present invention;

[0029] Figure 4 It is an elevation view of an embodiment of a spanning truss beam structure of the present invention;

[0030] Figure 5 It is a plan view of an embodiment of the platform layer of the device of the present invention;

[0031] Figure 6 It is a structural schematic diagram of a special-shaped support beam.

[0032] In the figure:

[0033] Description of reference numerals:

[0034] 1. One steel-concrete composite structural column; 2. One horizontal support member; 3. Special-shaped support beam; 4. Lower chord steel beam; 5. Web member; 6. Vertical support member; 7. Molten salt storage tank; 8. Square steel pipe; 9. Welded I-beam; 10. Upper flange end plate; 11. Oblique stiffening rib; 12. Two steel-concrete composite structural columns; 13. Two horizontal support members; 14. Diagonal stays. DETAILED DESCRIPTION

[0035] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0036] It should be noted that, in the present invention, the top, bottom, left and right in the figure are deemed to be the top, bottom, left and right of the straddling molten salt pump supporting steel platform described in this specification.

[0037] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0038] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0039] Embodiment 1:

[0040] This embodiment provides a spanning molten salt pump support steel platform, including 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 tank top of the 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;

[0041] The equipment platform layer includes a special-shaped support beam 3 and a horizontal support system. The special-shaped support beam 3 includes 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. A molten salt storage tank 7 is placed in the intermediate transition layer. A molten salt pump base is fixed on the special-shaped support beam 3. Figure 1 and Figure 2 shown.

[0042] The straddling molten salt pump supporting steel platform provided by the present invention is rigidly connected by the main frame and the straddling truss structure, thereby ensuring the vertical and horizontal stiffness and bearing capacity of the overall supporting structure, and transmitting all internal forces to the foundation, thereby meeting the vibration, bearing and deformation requirements of multiple molten salt pumps at high speeds.

[0043] Embodiment 2:

[0044] On the basis of Example 1, this embodiment provides a spanning molten salt pump support steel platform, wherein the three-dimensional frame includes a longitudinal beam, a transverse beam and a steel-concrete composite structure column 1, and the spanning truss structure includes a truss beam and a steel-concrete composite structure column 2 12, and the truss beam and the steel-concrete composite structure column 2 12 are rigidly connected; the truss beam includes an upper chord steel beam, a lower chord steel beam 4 and a web 5, and the web 5 is arranged between the upper chord steel beam and the lower chord steel beam 4, and the lower chord steel beam 4 is rigidly connected to the transverse support beam.

[0045] The vertical and horizontal stiffness and bearing capacity of the overall supporting structure are ensured by the steel-concrete composite structure column 1 and the steel-concrete composite structure column 2 12, and all internal forces are transmitted to the foundation.

[0046] Embodiment 3:

[0047] Based on Example 1, this example provides a straddling molten salt pump support steel platform, wherein the horizontal support system includes a horizontal support member 2 and a horizontal support member 13, wherein the horizontal support member 2 is arranged between the cross beams of the three-dimensional frame, and the horizontal support member 13 is arranged between the special-shaped support beams 3, and the arrangement density of the horizontal support member 13 is greater than that of the horizontal support member 2.

[0048] like Figure 1As shown, the horizontal support member 13 of the equipment platform layer adopts the principle of "encrypted small triangle" arrangement, and the horizontal support member 2 of the stereoscopic frame adopts the principle of "oblique large triangle" arrangement. It can significantly improve the torsional rigidity in the platform plane, and has the advantages of strong integrity and high economy.

[0049] Among them, the cross-sections of the horizontal supporting member 1 2 and the horizontal supporting member 2 13 are made of angle steel and H-shaped steel, and the ends are hingedly connected to the crossbeam.

[0050] Embodiment 4:

[0051] Based on Example 1, this example provides a spanning molten salt pump support steel platform, wherein the special-shaped support beam 3 includes an I-beam and an oblique stiffening rib 11, the upper flange welded end plate of the I-beam forms an upper flange end plate 10, and the oblique stiffening rib 11 is welded to the upper flange end plate 10 and the lower flange, respectively.

[0052] In this embodiment, the special-shaped support beam 3 is a special-shaped support beam, such as Figure 6 As shown, it is composed of welded I-beam 9, upper flange end plate 10 and oblique stiffening rib 11, which directly bears the base of the molten salt pump. This special-shaped support beam has the advantages of large torsional rigidity, high vertical and horizontal bearing capacity, and good support effect for rotating shaft pump equipment. One end of the special-shaped support beam (transverse support beam) must be rigidly connected to the square steel pipe 8, and the other end must be rigidly connected to the lower chord steel beam 4 of the truss beam, and there must be no interruption in the middle. Figure 5 The equipment platform layer is composed of the special-shaped support beam 3 and the horizontal support system.

[0053] Embodiment 5:

[0054] On the basis of Example 2, this embodiment provides a spanning molten salt pump support steel platform, wherein vertical support members 6 are provided between two adjacent steel-concrete composite structure columns 1 at both ends of the three-dimensional frame and between two adjacent steel-concrete composite structure columns 12 of the spanning truss structure, and both are in a two-way cross shape, and the vertical support members 6 between the steel-concrete composite structure columns 1 in the middle of the three-dimensional frame are in a unidirectional figure eight shape.

[0055] like Figure 3 and Figure 4 The vertical support member 6 is arranged between adjacent steel columns, and its overall layout principle is: the two ends of the three-dimensional frame adopt a two-way cross shape, and the middle adopts a one-way eight-shaped shape. It can significantly improve the torsional rigidity in the platform plane, and has the advantages of strong integrity and high economy.

[0056] Embodiment 6:

[0057] On the basis of Example 2, this example provides a straddling molten salt pump support steel platform, wherein the steel-concrete composite structure column 1 comprises a square steel pipe 8 and concrete, and the concrete is arranged on the lower periphery of the square steel pipe 8.

[0058] like Figure 3 As shown, the steel-concrete composite structure column 1 is only set below 4.0 meters in height, and is composed of outer concrete and square steel pipes 8, which ensures the vertical and horizontal rigidity and bearing capacity of the overall support structure and transmits all internal forces to the foundation. Above 4.0 meters, only square steel pipes 8 are arranged throughout the height for support.

[0059] like Figure 4 As shown, the steel-concrete composite structure column 2 12 is only set below 4.0 meters in height, and has the same structure as the steel-concrete composite structure column 1, both of which are composed of outer concrete and square steel pipes 8, ensuring the vertical and horizontal rigidity and bearing capacity of the overall support structure, and transmitting all internal forces to the foundation. Above 4.0 meters, only square steel pipes 8 are arranged for support.

[0060] Embodiment 7:

[0061] Based on Example 2, this embodiment provides a straddling molten salt pump support steel platform, wherein the cross-sectional stiffness 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 member 5 corresponds to the position of the steel-concrete composite structure column 1 of the three-dimensional frame.

[0062] like Figure 4 As shown, the spanning truss structure includes a truss beam and steel-concrete composite structural columns 12 on both sides. The steel truss beam spans the top of the molten salt storage tank 7 and is supported by steel-concrete composite structural columns 12 at both ends. The upper chord steel beam and the lower chord steel beam 4 of the truss beam are both welded I-beams, and the web member 5 is a steel section. The cross-sectional stiffness of the lower chord steel beam 4 is 2.5 times that of the upper chord steel beam, and the web member 5 is arranged to correspond to the square steel pipe 8 column of the three-dimensional frame. The spanning truss structure should be diagonally tied to the main structure to strengthen the integrity of the frame space.

[0063] Embodiment 8:

[0064] On the basis of Example 5, this embodiment provides a straddling molten salt pump support steel platform, wherein the bidirectional cross-shaped vertical support member 6 has a cross-sectional stiffness 1.5-2 times that of the unidirectional figure-eight-shaped vertical support member 6 .

[0065] The arrangement of the vertical support members 6 can significantly improve the torsional rigidity within the platform plane, and has the advantages of strong integrity and high economy.

[0066] Embodiment 9:

[0067] On the basis of Example 2, this example provides a spanning molten salt pump support steel platform, wherein the steel-concrete composite structure column 1 at the end of the three-dimensional frame and the steel-concrete composite structure column 2 12 at the end of the spanning truss structure are diagonally connected by a diagonal tie rod 14.

[0068] The spanning truss structure is diagonally connected to the three-dimensional frame to enhance the integrity of the frame space.

[0069] Embodiment 10:

[0070] The present embodiment provides a molten salt pump supporting method, which adopts a spanning molten salt pump supporting steel platform. After the two ends of the lower chord steel beam 4 of the truss beam spanning the truss structure are rigidly connected to the longitudinal beam of the three-dimensional frame, a transverse support beam is arranged between the middle part of the truss beam and the longitudinal beam of the three-dimensional frame, and then a longitudinal support beam is arranged between the transverse support beams to form an equipment platform layer. The molten salt pump base is installed on the special-shaped support beam 3 to bear the vertical bearing capacity and horizontal bearing capacity of the molten salt pump, thereby realizing the support of the molten salt pump.

[0071] The present invention, in conjunction with the large-diameter molten salt storage tank 7, solves the difficult problems of long-term heat storage and heat storage in the solar thermal power station. The steel frame platform of the present invention comprises four structural parts: a spanning truss beam, a special-shaped base beam section, a combined structural column and a support system. The frame platform of this structural form meets the strength, deformation and shock absorption requirements of the support structure of a large flow and high-lift molten salt pump, and realizes the function of efficient and stable operation of cold and hot molten salt pumps in a tower-type solar thermal power station. The spanning platform of the present invention can not only solve the problems of resonance and stiffness generated by multiple molten salt pumps during operation, but is also suitable for the support structure of other vertical long-axis pumps, and has certain economy and practicality.

[0072] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A straddle-type molten salt pump support steel platform, characterized in that: It comprises a three-dimensional frame, a spanning truss structure, an equipment platform layer and an intermediate transition layer, the three-dimensional frame and the spanning truss structure are rigidly connected via a beam, the spanning 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 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 spanning truss structure, the longitudinal support beam is arranged between the transverse support beams, and a molten salt pump base is fixedly arranged on the special-shaped support beam (3); The horizontal support system comprises a horizontal support member 1 (2) and a horizontal support member 2 (13), wherein the horizontal support member 1 (2) is arranged between the cross beams of the three-dimensional frame, and the horizontal support member 2 (13) is arranged between the special-shaped support beams (3), and the arrangement density of the horizontal support member 2 (13) is greater than that of the horizontal support member 1 (2); The special-shaped support beam (3) comprises an I-beam and oblique stiffening ribs (11), the upper flange of the I-beam is welded to an end plate to form an upper flange end plate (10), and the oblique stiffening ribs (11) are respectively welded to the upper flange end plate (10) and the lower flange.

2. A straddle-type molten salt pump support steel platform according to claim 1, characterized in that: The three-dimensional frame comprises a longitudinal beam, a transverse beam and a steel-concrete composite structural column (1); the spanning truss structure comprises a truss beam and a steel-concrete composite structural column (12); the truss beam and the steel-concrete composite structural column (12) are rigidly connected; the truss beam comprises an upper chord steel beam, a lower chord steel beam (4) and a web member (5); the web member (5) is arranged between the upper chord steel beam and the lower chord steel beam (4); the lower chord steel beam (4) is rigidly connected to a transverse support beam.

3. A straddle-type molten salt pump support steel platform according to claim 2, characterized in that: Vertical support members (6) are provided between two adjacent steel-concrete composite structural columns (1) at both ends of the three-dimensional frame and between two adjacent steel-concrete composite structural columns (12) across the truss structure, and both are in a bidirectional cross shape. The vertical support members (6) between the steel-concrete composite structural columns (1) in the middle of the three-dimensional frame are in a unidirectional figure eight shape.

4. A straddle-type molten salt pump support steel platform according to claim 2, characterized in that: The steel-concrete composite structural column 1 (1) comprises a square steel tube (8) and concrete, wherein the concrete is arranged on the lower periphery of the square steel tube (8), and the square steel tube (8) is rigidly connected to a transverse support beam.

5. The straddle-type molten salt pump support steel platform according to claim 2, characterized in that: The cross-sectional 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 member (5) corresponds to the position of the steel-concrete composite structural column one (1) of the three-dimensional frame.

6. The straddle-type molten salt pump support steel platform according to claim 3, characterized in that: The cross-sectional rigidity of the vertical support member (6) in a bidirectional cross shape is 1.5 to 2 times that of the vertical support member (6) in a unidirectional figure eight shape.

7. The straddle-type molten salt pump support steel platform according to claim 2, characterized in that: The first steel-concrete composite structure column (1) at the end of the three-dimensional frame and the second steel-concrete composite structure column (12) at the end of the spanning truss structure are connected diagonally by a diagonal tie rod (14).

8. A method for supporting a molten salt pump, using the straddle-type molten salt pump supporting steel platform according to claim 1, characterized in that: After the two ends of the lower chord steel beam (4) of the truss beam spanning the truss structure are rigidly connected to the longitudinal beam of the three-dimensional frame, a transverse support beam is arranged between the middle of the truss beam and the longitudinal beam of the three-dimensional frame, and then a longitudinal support beam is arranged between the transverse support beams to form an equipment platform layer. The molten salt pump base is installed on the special-shaped support beam (3) to bear the vertical bearing capacity and horizontal bearing capacity of the molten salt pump, thereby supporting the molten salt pump.

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