Molten salt pump cantilever support of arc-shaped anti-seismic wall structure

Abstract

The utility model belongs to the field of molten salt pump supports, and relates to a molten salt pump cantilever support of an arc-shaped anti-seismic wall structure. Comprising a hot molten salt pump support fan-shaped raft foundation, a cold molten salt pump support fan-shaped raft foundation, a hot salt pump support arc-shaped anti-seismic wall, a cold salt pump support arc-shaped anti-seismic wall, a hot molten salt pump cantilever support and a cold molten salt pump cantilever support. The fan-shaped raft foundation of the hot molten salt pump support is arranged on the side face of the hot molten salt storage tank. The cold molten salt pump support fan-shaped raft foundation is arranged on the side face of the cold molten salt storage tank. A hot salt pump bracket arc-shaped anti-seismic wall is arranged at the upper part of the hot molten salt pump bracket fan-shaped raft foundation; a cold salt pump support arc-shaped anti-seismic wall is arranged on the upper portion of the cold molten salt pump support fan-shaped raft foundation. The hot molten salt pump overhanging bracket is connected with the hot salt pump bracket arc-shaped anti-seismic wall; the cold molten salt pump overhanging bracket is connected with the cold salt pump bracket arc-shaped anti-seismic wall; the shock resistance of the support system is improved, the failure rate and the maintenance cost are reduced, and the structural rigidity of the support is improved.

Description

Technical Field

[0001] The utility model belongs to the field of molten salt pump supports, and particularly relates to a cantilever support for a molten salt pump with an arc-shaped seismic wall structure. Background Technique

[0002] With the increasing global demand for renewable energy, solar energy, as a clean and renewable energy form, has received extensive attention in its development and utilization. In the field of solar thermal power generation, molten salt tower solar thermal power plants have gradually become an important development direction of solar thermal power generation technology due to their advantages of high efficiency, stability, and the ability to achieve all-weather power generation. Such power plants use molten salt as the core heat conduction and storage medium, heat the molten salt through the high-temperature heat energy generated by concentrating sunlight, and then drive a steam turbine or heat engine to generate electricity, realizing the efficient conversion of solar energy into electrical energy.

[0003] However, in the actual operation of tower solar thermal power plants, the cold salt pump, as one of the key equipment, its operating stability directly affects the efficiency and reliability of the entire power generation system. However, the vibration problem of the cold salt pump has become a common technical problem. Although various power plants have tried many treatment methods, such as adjusting the installation position of the pump body, optimizing the operating parameters of the pump, and adding shock-absorbing devices, etc., although these measures have alleviated the vibration problem to a certain extent, they have not fundamentally solved its root cause, resulting in potential risks for the long-term stable operation of the cold salt pump.

[0004] In-depth analysis reveals that as a new type of power generation form, the tower solar thermal power plant has significant differences in the structural design, working environment, and operating conditions of its cold salt pump compared with traditional pump equipment. Especially for the cold salt pumps in the already put-into-operation tower solar thermal power plants, their structural design is complex, the operating environment is changeable, and they are affected by multiple factors such as high temperature, high pressure, and corrosive molten salt, making the causes of vibration problems more complex and changeable. However, the existing treatment methods and experiences are often difficult to be directly applied to such cold salt pumps, resulting in the vibration problems being difficult to be effectively solved. Content of the Utility Model

[0005] To solve the problems existing in the prior art, the utility model provides a cantilever support for a molten salt pump with an arc-shaped seismic wall structure.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a cantilever support for a molten salt pump with an arc-shaped seismic wall structure, which includes a fan-shaped raft foundation for the hot molten salt pump support, a fan-shaped raft foundation for the cold molten salt pump support, an arc-shaped seismic wall for the hot salt pump support, an arc-shaped seismic wall for the cold salt pump support, a cantilever support for the hot molten salt pump, and a cantilever support for the cold molten salt pump; the fan-shaped raft foundation for the hot molten salt pump support is arranged on the side of the hot molten salt storage tank; the fan-shaped raft foundation for the cold molten salt pump support is arranged on the side of the cold molten salt storage tank; the arc-shaped seismic wall for the hot salt pump support is arranged on the upper part of the fan-shaped raft foundation for the hot molten salt pump support; the arc-shaped seismic wall for the cold salt pump support is arranged on the upper part of the fan-shaped raft foundation for the cold molten salt pump support; the cantilever support for the hot molten salt pump is connected to the arc-shaped seismic wall for the hot salt pump support; the cantilever support for the cold molten salt pump is connected to the arc-shaped seismic wall for the cold salt pump support.

[0008] Preferably, the cantilever support for the hot molten salt pump is arranged above the hot molten salt storage tank.

[0009] Preferably, the cantilever support for the cold molten salt pump is arranged above the cold molten salt storage tank.

[0010] Preferably, the cantilever support for the hot molten salt pump is connected to the cantilever support for the cold molten salt pump.

[0011] Preferably, a salt drainage tank pit is arranged between the fan-shaped raft foundation for the cold molten salt pump support and the fan-shaped raft foundation for the hot molten salt pump support.

[0012] Preferably, buttress columns are arranged at the pit wall of the salt drainage tank pit.

[0013] Preferably, an equipment pipeline platform is arranged above the salt drainage tank pit.

[0014] Preferably, one side of the equipment pipeline platform is connected to the hot salt pump support, and the other side is connected to the cold salt pump support.

[0015] Preferably, the equipment pipeline platform is a double-layer frame structure; the top elevation of the upper layer of the equipment pipeline platform is unified with the top elevation of the cantilever support; the bottom elevation of the lower layer of the equipment pipeline platform is connected to the pipeline support and is unified.

[0016] Preferably, the top elevation of the cantilever support is the bottom elevation of the steel platen of the molten salt pump.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The design of the arc-shaped seismic wall of the utility model significantly improves the seismic performance of the support system, effectively reduces the impact of earthquakes on the molten salt pump, and ensures the stable operation of the system; the combined design of the fan-shaped raft foundation and the arc-shaped seismic wall enhances the overall stability of the support system and can withstand greater loads and more complex working conditions; the setting of the cantilever support makes the molten salt pump located above the storage tank, facilitating daily maintenance and repair work; at the same time, the double-layer design of the equipment pipeline platform also provides convenience for pipeline maintenance.

[0019] Furthermore, the design of the salt drainage tank pit and the buttress column improves the safety and environmental protection of the system, can quickly handle problems such as molten salt leakage in case of emergencies, and ensures the safety of personnel and equipment.

[0020] Furthermore, the salt drainage tank pit, the cantilever support and the equipment pipeline platform are integrally arranged, effectively saving the length of the molten salt pipeline and the floor area, and making the layout of the molten salt pipeline and equipment more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the utility model in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the utility model, rather than specifically defining the shapes and proportional dimensions of the components of the utility model.

[0022] In the drawings:

[0023] Figure 1 is the schematic plan view of the foundation of the utility model;

[0024] Figure 2 is the schematic plan view of the upper structure of the utility model;

[0025] Figure 3 is the schematic side sectional view of the hot molten salt pump support of the utility model;

[0026] Figure 4 is the schematic side sectional view of the cold molten salt pump support of the utility model.

[0027] In the figure, 1 - fan-shaped raft foundation of the hot molten salt pump support; 2 - fan-shaped raft foundation of the cold molten salt pump support; 3 - arc-shaped seismic wall of the hot salt pump support; 4 - arc-shaped seismic wall of the cold salt pump support; 5 - cantilever support of the hot molten salt pump; 6 - cantilever support of the cold molten salt pump; 7 - hot molten salt storage tank; 8 - cold molten salt storage tank; 9 - salt drainage tank pit; 10 - equipment pipeline platform; 11 - installation hole position of the molten salt pump; 12 - foundation of the equipment pipeline platform; 13 - foundation of the salt drainage tank pit; 14 - wall of the salt drainage tank pit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] The present utility model will be further described in detail below in conjunction with the accompanying drawings:

[0031] The present utility model provides a cantilever support for a molten salt pump with an arc-shaped seismic wall structure, as Figure 1 and Figure 2 shown, which includes a fan-shaped raft foundation 1 for the hot molten salt pump support, a fan-shaped raft foundation 2 for the cold molten salt pump support, an arc-shaped seismic wall 3 for the hot salt pump support, an arc-shaped seismic wall 4 for the cold salt pump support, a cantilever support 5 for the hot molten salt pump, and a cantilever support 6 for the cold molten salt pump; the fan-shaped raft foundation 1 for the hot molten salt pump support is arranged on the side of the hot molten salt storage tank 7; the fan-shaped raft foundation 2 for the cold molten salt pump support is arranged on the side of the cold molten salt storage tank 8; the arc-shaped seismic wall 3 for the hot salt pump support is arranged on the upper part of the fan-shaped raft foundation 1 for the hot molten salt pump support; the arc-shaped seismic wall 4 for the cold salt pump support is arranged on the upper part of the fan-shaped raft foundation 2 for the cold molten salt pump support; the cantilever support 5 for the hot molten salt pump is connected to the arc-shaped seismic wall 3 for the hot salt pump support; the cantilever support 6 for the cold molten salt pump is connected to the arc-shaped seismic wall 4 for the cold salt pump support.

[0032] Two sector-shaped raft foundations are respectively arranged on the sides of the hot molten salt storage tank 7 and the cold molten salt storage tank 8, mainly bearing the weight of the molten salt pump support and its upper structure, and evenly distributing it to the foundation. The utility model adopts a sector-shaped raft design to increase the contact area with the foundation and improve the bearing capacity and stability of the foundation. The sector-shaped raft foundation ensures the stability of the support under external forces such as earthquakes with its good integrity and bearing capacity. There is a salt drainage tank pit foundation 13 arranged between the two sector-shaped raft foundations, and a salt drainage tank pit 9 is arranged on the upper part of the salt drainage tank pit foundation 13; the layout of the two sector-shaped raft foundations should be considered together with the upper cantilever support to meet the requirement that there is enough space for the salt drainage tank pit 9 and the upper equipment and pipelines to be arranged, and their clear distance is usually more than 8.5 meters.

[0033] The cross-section of the arc-shaped seismic wall is arranged with a number of box-shaped walls in a row continuously. According to the actual situation of different projects, a number of I-shaped walls can also be arranged in a row, and end columns can be added at the corners of the walls according to the specific form of the cantilever support; the design of the wall cross-section mainly depends on ensuring the stiffness of the cantilever support. The main parameters affecting the structural stiffness are: the distance between two circumferential walls, the thickness of the circumferential wall, the cross-sectional area of the wing wall of the I-shaped wall, and the cross-sectional area of the end column; the bottom and top cavities are filled with graded sand and gravel or other suitable counterweight materials. Preferably, the arc-shaped seismic wall is a wall structure formed by combining steel bars and concrete and through a specific arc design. The arc design is adopted to better disperse and absorb the energy of seismic waves, and the high-strength concrete and steel bars can ensure that it has sufficient stiffness and toughness to resist the influence of natural disasters such as earthquakes. The utility model as a whole adopts a reinforced concrete structure with a large self-weight, and counterweight materials are filled in the key parts of the concrete arc wall, which can effectively suppress the overall vibration of the structure.

[0034] The hot molten salt pump cantilever support 5 is connected to the arc-shaped seismic wall 3 of the hot salt pump support; the cold molten salt pump cantilever support 6 is connected to the arc-shaped seismic wall 4 of the cold salt pump support, and the hot molten salt pump cantilever support 5 is arranged above the hot molten salt storage tank 7, and the cold molten salt pump cantilever support 6 is arranged above the cold molten salt storage tank 8; there are molten salt pump installation holes 11 arranged on the cantilever supports for supporting and fixing equipment such as molten salt pumps.

[0035] The hot molten salt pump cantilever bracket 5 and the cold molten salt pump cantilever bracket 6 are respectively connected to their respective arc-shaped seismic walls and arranged above the molten salt storage tank. This design not only saves ground space, but also facilitates the maintenance and overhaul of the molten salt pump. The cantilever bracket structure is "concrete cantilever beam + steel support". The connection between the concrete bracket and the main body is the simplest and most reliable. However, since it is located above the storage tank, it is usually difficult to form and cast. Therefore, when the construction process cannot be achieved, it can be changed to a pure steel structure triangular support form. The end is reliably connected to the main concrete wall by using a steel concrete beam or welding with a pre-buried steel plate, and a corbel is set at the bottom of the steel beam to ensure the safety of the structure; the top elevation of the cantilever bracket is the bottom elevation of the steel platform of the molten salt pump. Considering the cross-sectional height of the cantilever bracket itself, the cold and hot deformation of the tank, and the thickness of the tank top insulation material, the top elevation of the cantilever bracket is usually more than 3.5 meters higher than the top of the tank side wall to avoid collision between the bracket structure and the tank; a continuous concrete slab is set on the top of the cantilever bracket and reliably connected to the structural member to provide the rigidity in the plane of the slab to the direction where the horizontal rigidity of the steel bracket is weak. The cantilever bracket adopts a modular design to facilitate on-site installation and later maintenance; at the same time, the various parts of the bracket system are tightly connected and the structure is clear, which is conducive to reducing construction difficulty and improving work efficiency.

[0036] like Figure 3 and Figure 4 As shown, a salt dredging tank pit 9 is arranged between the fan-shaped raft foundation 1 of the hot molten salt pump support and the fan-shaped raft foundation 2 of the cold molten salt pump support, and an equipment pipeline platform 10 is arranged on the upper part of the salt dredging tank pit 9. Buttresses are arranged on the salt dredging tank pit wall 14 as the frame column foundation of the upper equipment pipeline platform 10, and the buttresses can enhance the stability and bearing capacity of the salt dredging tank pit wall 14. The buttresses are closely connected to the pit wall and the foundation to form a stable support system; a tension beam can be arranged at the buttress column at the top of the salt dredging tank pit wall 14 to be tied to the radial concrete wall of the molten salt pump support to reduce the calculated length of the frame column and enhance the stability of the salt dredging tank pit wall 14 and the frame column. The salt dredging tank pit 9 can be used to collect and discharge excess molten salt or deal with molten salt leakage in an emergency. The design of the salt dredging tank pit 9 improves the safety and environmental protection of the system.

[0037] The equipment pipeline platform 10 is a double-layer frame structure. One side of the equipment pipeline platform 10 is connected to the cold salt pump support, and the other side is connected to the hot salt pump support; the top elevation of the upper layer of the equipment pipeline platform 10 is unified with that of the cantilever support; the lower layer of the equipment pipeline platform 10 is connected to the pipeline support and the elevation is unified. It is advisable that the equipment pipeline platform 10 adopt a reinforced concrete structure, which can provide more stiffness for the molten salt pump support while meeting the use functions. The equipment pipeline platform 10 is used to install and support the pipelines and equipment related to the molten salt pump, realizing the centralized layout and management of the pipelines and equipment; the double-layer frame structure design of the equipment pipeline platform 10 not only saves space but also facilitates the maintenance and repair of the pipelines; at the same time, the top elevation of the upper layer of the equipment pipeline platform 10 is unified with that of the cantilever support, and the lower layer is connected to the pipeline support and the elevation is unified, ensuring the coordination and aesthetics of the entire system.

[0038] Through the design of the arc-shaped seismic wall of the hot salt pump support and the arc-shaped seismic wall of the cold salt pump support introduced in the present utility model, the seismic resistance of the entire support system is significantly improved. The arc-shaped structure can more effectively disperse and absorb the energy generated by seismic waves, reduce the impact of earthquakes on the support and the molten salt pump, ensure that the molten salt pump and its related equipment can operate stably during natural disasters such as earthquakes, and reduce the failure rate and maintenance cost; the cantilever support adopts a single-sided cantilever form instead of a double-sided long-span steel truss form, increasing the stiffness of the support structure.

[0039] By optimizing the design of the support platform to reduce the generation and propagation of exciting forces, the present utility model can effectively reduce the vibration amplitude and frequency of the cold salt pump, thereby avoiding the damage caused by vibration to the pump body and the entire power generation system. This can not only improve the operation efficiency and economy of the power station but also extend the service life of the equipment and reduce the maintenance cost, which is of great significance for promoting the further development and application of tower-type solar thermal power generation technology.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

Claims

1. A molten salt pump cantilever bracket of an arc-shaped seismic wall structure, characterized in that: The invention comprises a hot molten salt pump support fan-shaped raft foundation (1), a cold molten salt pump support fan-shaped raft foundation (2), a hot salt pump support arc-shaped seismic wall (3), a cold salt pump support arc-shaped seismic wall (4), a hot molten salt pump cantilever support (5) and a cold molten salt pump cantilever support (6); the hot molten salt pump support fan-shaped raft foundation (1) is arranged on the side of a hot molten salt storage tank (7); the cold molten salt pump support fan-shaped raft foundation (2) is arranged on the side of a cold molten salt storage tank (8); the hot salt pump support arc-shaped seismic wall (3) is arranged on the upper part of the hot molten salt pump support fan-shaped raft foundation (1); the cold salt pump support arc-shaped seismic wall (4) is arranged on the upper part of the cold molten salt pump support fan-shaped raft foundation (2); the hot molten salt pump cantilever support (5) is connected to the hot salt pump support arc-shaped seismic wall (3); the cold molten salt pump cantilever support (6) is connected to the cold salt pump support arc-shaped seismic wall (4).

2. The molten salt pump cantilever bracket of the arc-shaped seismic wall structure according to claim 1 is characterized in that: The hot molten salt pump cantilever bracket (5) is arranged above the hot molten salt storage tank (7).

3. The molten salt pump cantilever bracket of the arc-shaped seismic wall structure according to claim 1 is characterized in that: The cold molten salt pump cantilever bracket (6) is arranged above the cold molten salt storage tank (8).

4. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 1, characterized in that: The hot molten salt pump cantilever bracket (5) is connected to the cold molten salt pump cantilever bracket (6).

5. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 1, characterized in that: A salt drainage tank pit (9) is provided between the cold molten salt pump support fan-shaped raft foundation (2) and the hot molten salt pump support fan-shaped raft foundation (1).

6. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 5, characterized in that: Buttress columns are arranged on the pit wall of the salt trap pit (9).

7. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 5, characterized in that: An equipment pipeline platform (10) is arranged on the upper part of the salt drainage tank pit (9).

8. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 7, characterized in that: One side of the equipment pipeline platform (10) is connected to the hot salt pump bracket, and the other side is connected to the cold salt pump bracket.

9. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 8, characterized in that: The equipment pipeline platform (10) is a double-layer frame structure; the upper layer of the equipment pipeline platform (10) has the same elevation as the top of the cantilever bracket; and the lower layer of the equipment pipeline platform (10) is connected to the pipeline bracket and has the same elevation.

10. The cantilever bracket for a molten salt pump of a curved seismic wall structure according to claim 9, characterized in that: The top elevation of the cantilever bracket is the bottom elevation of the steel platform of the molten salt pump.

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