High-temperature molten salt pump with self-balancing sealing, modularization and supporting integrated structure

Abstract

The invention relates to a high-temperature molten salt pump of a self-balancing sealing, modularization and supporting integrated structure. The high-temperature molten salt pump comprises a discharge seat, a modularization outer pipe component, a pump head component and the like. The pump head part is installed below the liquid level in the molten salt tank, the discharge seat is installed above the bottom plate, the discharge seat and the pump head part are connected through a plurality of modularized outer pipes, and the number of the modularized outer pipe parts can be changed according to the installation depth of the molten salt pump. The modularized outer pipe components, the modularized outer pipe components and the pump head component as well as the modularized outer pipe components and the discharge seat are internally connected through sleeve coupling components and externally connected through flanges. The submerged pump is compact in structure, free of leakage, safe and reliable, and meanwhile the problems that a whole common molten salt pump is difficult to install and high in cost, and a long shaft of the submerged pump eccentrically shakes and rubs are solved; the main parts are installed in a modularized mode, installation and disassembly are convenient, the number of the parts of the modularized lifting pipe is adjustable, the parts are installed and disassembled section by section, and the overhaul space is small.

Description

Technical Field

[0001] The invention relates to a high-temperature molten salt pump, in particular to a high-temperature molten salt pump which is self-balancing, has good sealing performance, is easy to install and maintain, has good shaft rigidity, a modularized support integrated structure, and has an adjustable diving depth and a self-balancing, sealed, modular, and support integrated structure. Background Art

[0002] With global warming and the depletion of non-renewable resources, the research and development of renewable energy has received increasing attention. In the field of solar thermal power generation, molten salt energy storage technology has been widely used due to its high efficiency and stability. As a key component in the molten salt energy storage system, the solar thermal molten salt pump plays a vital role in achieving efficient utilization and storage of solar energy.

[0003] The solar thermal molten salt pump is mainly responsible for transporting hot salt from the hot salt tank to the steam generation system in the molten salt energy storage system, exchanging heat with water / steam to produce high-temperature and high-pressure superheated steam, and returning the cold salt after heat release to the cold salt tank, completing the molten salt absorption, storage, and conversion cycle. In this process, the performance of the solar thermal molten salt pump directly affects the efficiency and stability of the molten salt energy storage system.

[0004] Molten salt pumps are usually long-axis pumps, which generally generate large axial forces. In addition, the medium usually climbs the shaft during operation, posing a risk of leakage.

[0005] When installing a molten salt pump, the entire pump is usually hoisted, which is costly and inconvenient to disassemble and inspect. The system is complex, causing the pump shaft to shake violently and the bearing to be constantly worn on one side. As a result, the submersible pump is damaged more frequently and the pump inspection cycle is short. Summary of the invention

[0006] In view of the above problems, the main purpose of the present invention is to provide a high-temperature molten salt pump with self-balancing, good sealing, easy installation and maintenance, good shaft rigidity, modular support integrated structure, and adjustable diving depth.

[0007] The present invention solves the above technical problems through the following technical solutions: a high-temperature molten salt pump with a self-balancing, sealed, modular, and integrally supported structure, the high-temperature molten salt pump with a self-balancing, sealed, modular, and integrally supported structure comprises: a discharge seat, a modular outer tube component, and a pump head component; the pump head component is installed below the liquid level in the molten salt tank, the discharge seat is installed above the bottom plate, and the discharge seat and the pump head component are connected by several modular outer tube components.

[0008] The interiors of adjacent modular outer tube components are connected by a sleeve coupling component, the interiors of the modular outer tube component and the pump head component are connected by a sleeve coupling component, and the interiors of the modular outer tube component and the discharge seat are connected by a sleeve coupling component.

[0009] The exteriors of adjacent modular outer tube components are connected by flange connection, the exteriors of the modular outer tube components and the pump head components are connected by flange connection, and the exteriors of the modular outer tube components and the discharge seat are connected by flange connection.

[0010] A self-balancing sealing structure is arranged below the discharge seat.

[0011] In a specific implementation example of the present invention, the self-balancing seal includes an upper shaft, a branch pipe, a drain pipe, a retaining ring, a balancing sleeve, a wear-resistant ring and a saddle screw; the balancing sleeve is fixed to the upper shaft by a retaining ring and a key, and the upper shaft drives the balancing sleeve to rotate; the wear-resistant ring is fixed to the branch pipe by a saddle screw, the drain pipe is welded to the branch pipe, and the branch pipe is fixed to the discharge seat by a rib plate.

[0012] In a specific implementation example of the present invention, the modular outer tube component includes an outer tube, a central axis, a wear-resistant ring bracket, a wear-resistant ring, a balancing sleeve, a retaining ring, a key, a positioning screw and a saddle screw. The balancing sleeve is fixed to the central axis by the retaining ring and the key and rotates with the central axis. The wear-resistant ring is installed in the wear-resistant ring bracket and fixed by the saddle screw. The wear-resistant ring bracket is fixed to the outer tube by the positioning screw.

[0013] In a specific implementation example of the present invention, the sleeve coupling component includes a sleeve coupling and a ferrule, and the ferrule is a half-type structure that is easy to disassemble and assemble.

[0014] In a specific implementation example of the present invention, a spiral wound gasket for sealing is provided at the joint of the flange connection surfaces.

[0015] In a specific implementation example of the present invention, the medium in the high-pressure zone leaks into the inner cavity of the branch pipe through the extremely small gap formed by the balance sleeve and the wear-resistant ring, and the leaked medium flows back to the molten salt storage tank through the drain pipe.

[0016] In a specific implementation example of the present invention, the balancing sleeve forms a force from the high-pressure area to the low-pressure area due to the front and rear pressure difference, and this force can balance the huge axial force generated when the water pump impeller is working.

[0017] The positive progressive effect of the present invention is that the high-temperature molten salt pump with self-balancing sealing, modularization and integrated support structure provided by the present invention has the following advantages compared with common technologies: the present invention has the advantages of compact structure, no leakage, safety and reliability, while avoiding the problems of difficult installation of the entire pump, high cost, and eccentric shaking and friction of the long axis of the submersible pump of ordinary molten salt pumps; the main components are installed in a modular manner, and installation and disassembly are convenient. The number of modular lifting tube components is adjustable, and the components are installed and disassembled section by section, so the maintenance space is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is one of the overall structural schematic diagrams of the present invention.

[0019] Figure 2-1 It is one of the partial structural schematic diagrams of the present invention.

[0020] Figure 2-2 It is one of the partial principle schematic diagrams of the present invention.

[0021] Figure 3 It is one of the partial structural schematic diagrams of the present invention.

[0022] Figure 4 It is a schematic diagram of the wear-resistant ring bracket in the present invention.

[0023] The following are the names corresponding to the labels in the present invention:

[0024] Discharge seat 01, base plate 02, winding pad 03, retaining ring 04, upper shaft 05, branch pipe 06, drain pipe 07, pump head component 100, sleeve coupling component 200, modular outer tube component 300, outer tube 301, middle shaft 302, wear-resistant ring bracket 303, positioning screw 304, saddle screw 305, balancing sleeve 306, wear-resistant ring 307, key 308. DETAILED DESCRIPTION

[0025] Preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solutions of the present invention in detail.

[0026] Figure 1 It is one of the overall structural diagrams of the present invention, as shown in FIG. Figure 1 As shown: the high-temperature molten salt pump with self-balancing sealing, modularization and integrated support structure provided by the present invention comprises a discharge seat 01, a modular outer tube component 300, a pump head component 100, etc. The pump head component 100 is installed below the liquid level in the molten salt tank, the discharge seat 01 is installed above the bottom plate 02, and the discharge seat 01 and the pump head component 100 are connected by a plurality of modular outer tube components 300, and the number of modular outer tube components 300 is variable according to the installation depth of the molten salt pump.

[0027] The interiors of adjacent modular outer tube components 300 are connected via a sleeve coupling component 200 , the interiors of the modular outer tube component 300 and the pump head component 100 are connected via a sleeve coupling component 200 , and the interiors of the modular outer tube component 300 and the discharge seat 01 are connected via a sleeve coupling component 200 .

[0028] The exteriors of adjacent modular outer tube components 300 are connected by flange connection, the exteriors of the modular outer tube component 300 and the pump head component 100 are connected by flange connection, and the exteriors of the modular outer tube component 300 and the discharge seat 01 are connected by flange connection.

[0029] A self-balancing sealing structure is provided below the discharge seat 01. Figure 2-1 As shown, the self-balancing sealing structure includes an upper shaft 05, a branch pipe 06, a drain pipe 07, a retaining ring 04, a balancing sleeve 306, a wear-resistant ring 307 and a saddle screw 305; the balancing sleeve 306 is fixed to the upper shaft 05 by the retaining ring 04 and the key 308, and the upper shaft 05 drives the balancing sleeve 306 to rotate; the wear-resistant ring 307 is fixed to the branch pipe 06 by the saddle screw 305, the drain pipe 07 is welded to the branch pipe 06, and the branch pipe 06 is fixed to the discharge seat 01 by a rib plate.

[0030] like Figure 2-1 and 2-2 As shown, the medium in the high-pressure zone leaks into the inner cavity of the branch pipe 06 through the extremely small gap formed by the balance sleeve 306 and the wear-resistant ring 307, and the leaked medium flows back to the molten salt storage tank through the drain pipe 07, ensuring that the conveying medium does not leak into the environment, thereby achieving a sealing effect.

[0031] like Figure 2-2 As shown, the balancing sleeve 306 forms a force from the high pressure area to the low pressure area due to the pressure difference between the front and rear, and this force can balance the huge axial force generated when the water pump impeller is working.

[0032] like Figure 3 As shown, the modular outer tube component includes an outer tube 301, a central axis 302, a wear-resistant ring bracket 303, a wear-resistant ring 307, a balancing sleeve 306, a retaining ring 04, a key 308, a positioning screw 304 and a saddle screw 305. The balancing sleeve 306 is fixed to the central axis 302 by the retaining ring 04 and the key 308 and rotates with the central axis 302. The wear-resistant ring 307 is installed in the wear-resistant ring bracket 303 and fixed by the saddle screw 305. The wear-resistant ring bracket 303 is fixed to the outer tube 301 by the positioning screw 304.

[0033] like Figure 4As shown, compared with the integrated welding structure, the wear-resistant ring bracket 303 has a simple casting structure and low material cost; low processing difficulty, reducing processing time and cost, and effectively reducing processing cost; modular design, easy to quickly disassemble and assemble, reducing maintenance difficulty and cost; ensuring the concentricity and other precision requirements of parts, components and systems, and improving product performance; having good vibration reduction performance, reducing the impact of mechanical vibration on guide bearings, and extending the service life of equipment.

[0034] The sleeve coupling component 200 is composed of a sleeve coupling 201 and a ferrule 202. The ferrule 202 is a half-split structure and is easy to disassemble and assemble.

[0035] The following is the specific working process of the present invention:

[0036] like Figure 2-2 As shown in the figure, after the high-pressure area fluid reaches the high-speed rotating balance sleeve and is throttled, most of the conveying medium flows into the system pipeline through the discharge seat, and only a very small part of the medium leaks into the branch cavity, and then flows back to the molten salt storage tank through the return pipe, ensuring that the conveying medium does not leak into the environment, achieving a sealing effect. Due to the pressure difference between the front and rear of the balance sleeve, a force is formed from the high-pressure area to the low-pressure area. This force can balance the huge axial force generated by the pump impeller when it is working.

[0037] In a preferred embodiment of the present invention, both ends of the sleeve coupling component are axially positioned by snap rings 04.

[0038] In a preferred embodiment of the present invention, the flange connection surface is sealed with a spiral wound gasket 03 .

[0039] The high-temperature molten salt pump with a self-balancing seal, modularization and integrated support structure provided by the present invention has the advantages of compact structure, no leakage, safety and reliability, while avoiding the problems of difficult installation of the entire pump, high cost, and eccentric shaking and friction of the long axis of the submersible pump of ordinary molten salt pumps; the main components are installed in a modular manner, and installation and disassembly are convenient; the number of modular lifting tube components is adjustable, and the components are installed and disassembled section by section, so the maintenance space is small.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A high-temperature molten salt pump with a self-balancing seal, modularization, and integrated support structure, characterized in that: The high-temperature molten salt pump with a self-balancing seal, modularization and integrated support structure comprises: a discharge seat, a modular outer tube component and a pump head component; the pump head component is installed below the liquid level in the molten salt tank, the discharge seat is installed above the bottom plate, and the discharge seat and the pump head component are connected by a plurality of modular outer tube components; The interiors of adjacent modular outer tube components are connected by a sleeve coupling component, the interiors of the modular outer tube component and the pump head component are connected by a sleeve coupling component, and the interiors of the modular outer tube component and the discharge seat are connected by a sleeve coupling component; The exteriors of adjacent modular outer tube components are connected by flange connection, the exteriors of the modular outer tube components and the pump head components are connected by flange connection, and the exteriors of the modular outer tube components and the discharge seat are connected by flange connection; A self-balancing sealing structure is arranged below the discharge seat.

2. The high-temperature molten salt pump with self-balancing sealing, modularization and integrated support structure according to claim 1 is characterized in that: The self-balancing seal includes an upper shaft, a branch pipe, a drain pipe, a clamping ring, a balancing sleeve, a wear-resistant ring and a saddle screw; the balancing sleeve is fixed to the upper shaft by a clamping ring and a key, and the upper shaft drives the balancing sleeve to rotate; the wear-resistant ring is fixed to the branch pipe by a saddle screw, the drain pipe is welded to the branch pipe, and the branch pipe is fixed to the discharge seat by a rib plate.

3. The high-temperature molten salt pump with self-balancing sealing, modularization and integrated support structure according to claim 1 is characterized in that: The modular outer tube component includes an outer tube, a central axis, a wear-resistant ring bracket, a wear-resistant ring, a balancing sleeve, a retaining ring, a key, a positioning screw and a saddle screw. The balancing sleeve is fixed to the central axis by the retaining ring and the key and rotates with the central axis. The wear-resistant ring is installed in the wear-resistant ring bracket and fixed by the saddle screw. The wear-resistant ring bracket is fixed to the outer tube by the positioning screw.

4. The high-temperature molten salt pump with a self-balancing sealing, modularization and integrated support structure according to claim 1 is characterized in that: The sleeve coupling component comprises a sleeve coupling and a ferrule, and the ferrule is a half-type structure which is easy to disassemble and assemble.

5. The high-temperature molten salt pump with self-balancing sealing, modularization and integrated support structure according to claim 1 is characterized in that: A spiral wound gasket for sealing is provided at the joint of the flange connection surface.

6. The high-temperature molten salt pump with self-balancing sealing, modularization and integrated support structure according to claim 1 is characterized in that: The medium in the high-pressure area leaks into the inner cavity of the branch pipe through the extremely small gap formed by the balance sleeve and the wear-resistant ring, and the leaked medium flows back to the molten salt storage tank through the drain pipe.

7. The high-temperature molten salt pump with a self-balancing, sealing, modular, and integrally supported structure according to claim 1 is characterized in that: Due to the pressure difference between the front and rear, the balance sleeve forms a force from the high-pressure area to the low-pressure area. This force can balance the huge axial force generated by the water pump impeller when it is working.

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