A cooling water structure for a high-temperature molten salt pump bearing housing

Abstract

This utility model relates to a cooling water structure for a high-temperature molten salt pump bearing housing. The structure includes: a coil installed within the bearing housing, with both ends of the coil connected to one end of an inlet connector and one end of an outlet connector, respectively. The other ends of both the inlet and outlet connectors are equipped with welded connecting pipes. A sealing structure is provided at the connection plate between the inlet and outlet connectors and the bearing housing. The inlet and outlet connectors pass through the connection plate of the bearing housing and are secured to the connection plate by nuts. This utility model achieves safe sealing and easy disassembly through the coil passing through the lubricating oil and the combination of welded components and standard parts. This structure avoids the complex arrangement of the bearing housing lubricating oil pipeline and allows for the drainage of internal water sources in low-temperature or pump-stop conditions, preventing freezing damage to the pipelines. The use of a double-sealing ring + threaded connection modular structure provides excellent sealing performance, a compact structure, and the ability to be disassembled.

Description

Technical Field

[0001] This utility model relates to a cooling water structure, specifically a high-temperature molten salt pump bearing cooling water structure that is easy to install, reliably sealed, and convenient for later maintenance and replacement. Background Technology

[0002] In concentrated solar power (CSP) plants, molten salt pumps are critical equipment; a malfunction could cause the entire system to shut down. Molten salt typically operates at temperatures above 400°C or 600°C. This high temperature is conducted through the pump shaft to the bearing housing, and the bearings themselves also generate frictional heat during operation. Without effective cooling, the bearing temperature will rise rapidly, leading to lubrication failure, bearing damage, bearing seal failure, and serious consequences such as equipment shutdown. Generally, molten salt pumps are installed outdoors, making adaptability to ambient temperatures crucial. Desert power plants face harsh summer conditions and extremely low winter temperatures.

[0003] The existing molten salt pump's cooling water structure has its inlet and outlet located radially within the bearing housing. The bearing housing itself requires space for pipes for vibration monitoring, temperature measurement, lubricating oil inlet / outlet, and oil level monitoring, resulting in a dense piping system. Furthermore, in winter, when the pump stops due to low temperatures, water condensation and expansion within the cooling water pipes can cause damage or blockage. Sometimes, temporary cooling water connections are needed on-site, often using direct welding for emergency situations. However, disassembly and replacement are extremely difficult, frequently requiring cutting and re-welding. Additionally, direct welding requires precise alignment of the external piping threads during installation; even slight deviations in the coil's installation position can lead to connection difficulties or poor sealing, resulting in leakage. Moreover, the high-temperature thermal stress generated during welding can also affect the material properties of the coil itself. This high maintenance cost and demanding operator skill level make installation and modification inconvenient.

[0004] The molten salt pumps in the power plant will operate at full or partial load depending on solar resources, and will be started and stopped daily as needed. Taking these conditions into full consideration, the auxiliary equipment for the molten salt pumps will be selected, and the reliability of the equipment will be ensured to meet the requirements for immediate start-up. Utility Model Content

[0005] To address the aforementioned problems, the main objective of this utility model is to provide a cooling water structure for the bearing housing of a high-temperature molten salt pump that is easy to install, reliably sealed, and convenient for later maintenance and replacement.

[0006] This utility model solves the above-mentioned technical problems through the following technical solution: a cooling water structure for a high-temperature molten salt pump bearing body, the cooling water structure for a high-temperature molten salt pump bearing body includes: a coil installed in the bearing body, one end of the coil is provided with an inlet connector and the other end of the inlet connector and the other end of the outlet connector are provided with welded pipes, a sealing structure is provided at the connection plate between the inlet connector and the outlet connector and the bearing body, the inlet connector and the outlet connector pass through the connection plate of the bearing body and are fixed to the connection plate of the bearing body.

[0007] In a specific embodiment of this utility model, the sealing structure includes an annular sealing groove disposed on the bearing body and a first sealing ring embedded in the annular sealing groove.

[0008] In a specific embodiment of this utility model, the first sealing ring is a standard O-ring or gasket, and its material is nitrile rubber or silicone rubber.

[0009] In a specific embodiment of this utility model, the inlet connector and the outlet connector are fixed to the connecting plate of the bearing body with nuts.

[0010] In a specific embodiment of this utility model, the inlet connector, the outlet connector, and the welded pipe are fixedly connected together by a second sealing ring and a connecting nut, and can be disassembled by the connecting nut 6.

[0011] In a specific embodiment of this utility model, the second sealing ring is a standard O-ring or gasket, and its material is nitrile rubber or silicone rubber.

[0012] In a specific embodiment of this utility model, the ends of the coil and the inlet and outlet connectors are fixedly connected by brazing or fusion welding.

[0013] The positive and progressive effects of this utility model are as follows: The cooling water structure for the high-temperature molten salt pump bearing body provided by this utility model has the following advantages: This utility model is a structure that combines welding and threaded connection. This structure is easy to install, has reliable sealing, and is convenient for later maintenance and replacement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of a partial disassembly structure of the present invention.

[0017] The following are the names corresponding to the reference numerals in this utility model: In the diagram: 1. Coil; 2. Inlet connector; 3. Outlet connector; 4. First sealing ring; 5. Nut; 6. Connecting nut; 7. Second sealing ring; 8. Welded pipe; 9. Bearing body. Detailed Implementation

[0018] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a partial structural schematic diagram of the present invention. Figure 3 This is a schematic diagram of a partial disassembly structure of the present invention, as shown below. Figure 1-3 As shown: This utility model proposes a cooling water structure for a high-temperature molten salt pump bearing housing. The cooling water structure includes: a coil 1 installed inside the bearing housing 9, with both ends of the coil 1 connected to one end of an inlet connector 2 and an outlet connector 3, respectively. The other ends of both the inlet connector 2 and the outlet connector 3 are equipped with welded connecting pipes 8. A sealing structure is provided at the connection plate between the inlet connector 2 and the outlet connector 3 and the bearing housing. The inlet connector 2 and the outlet connector 3 pass through the connection plate of the bearing housing and are fixed to the connection plate by tightening nuts. The sealing structure includes an annular sealing groove on the bearing housing and a first sealing ring 4 embedded in the annular sealing groove.

[0020] In the specific implementation process, the first sealing ring 4 is generally a standard O-ring or gasket, and its material is nitrile rubber or silicone rubber.

[0021] In the specific implementation process, the inlet connector 2 and the outlet connector 3 are fixed to the connecting plate of the bearing body with nuts 5. The inlet connector 2, the outlet connector 3 and the welded pipe 8 are fixedly connected together with the second sealing ring 7 and the connecting nut 6, and can be disassembled through the connecting nut 6.

[0022] In the specific implementation process, the second sealing ring 7 is generally a standard O-ring or gasket, and its material is nitrile rubber or silicone rubber.

[0023] In the specific implementation process, the ends of the coil 1 are fixedly connected to the inlet connector 2 and the outlet connector 3 by brazing or fusion welding. The standard nut 5 mates with the external thread of the inlet connector 2 or the outlet connector 3, and the first sealing ring 4 is pressed by tightening the locking nut 5, so that the coil and the bearing body are tightly connected to achieve axial sealing. The welded connecting pipe 8 is fitted with the second sealing ring 7 and the connecting nut 6 in sequence, and can be disassembled by the connecting nut 6.

[0024] When the nut 5 of the external pipeline is screwed into the inlet connector 2 and outlet connector 3 along the external threaded joint, its end will press against the first sealing ring 4 to form the first seal.

[0025] The welded connector 8 is welded to the external inlet and outlet water pipes. Each welded connector 8 has a second O-ring rubber seal 7 and a rotatable connecting nut 6 fitted sequentially from the inside out. The connecting nut 6 is used to mate with the threaded end of the inlet connector 2 (or outlet connector 3). One end of the inlet connector 2 is inserted into the inner cavity of the connecting nut 6, and its end face presses against the second sealing ring 7. When the connecting nut 6 is tightened, the welded connector is pushed inward, thereby axially compressing the second sealing ring 7, causing it to elastically deform and fill all assembly gaps, forming a second reliable seal.

[0026] This cooling structure is suitable for the bearing cooling system of high-temperature pump equipment such as molten salt pump bearing housing, hot oil pump, and steam pump.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A cooling water structure for a high-temperature molten salt pump bearing housing, characterized in that: The high-temperature molten salt pump bearing housing cooling water structure includes: a coil (1) installed in the bearing housing, the two ends of the coil (1) being connected to one end of the inlet connector (2) and the outlet connector (3) respectively, the other ends of the inlet connector (2) and the outlet connector (3) being provided with welded pipes (8), the inlet connector (2) and the outlet connector (3) being provided with a sealing structure at the connection plate of the bearing housing, the inlet connector (2) and the outlet connector (3) passing through the connection plate of the bearing housing and being fixed to the connection plate of the bearing housing by the tightening force of nuts.

2. The cooling water structure for the bearing housing of the high-temperature molten salt pump according to claim 1, characterized in that: The sealing structure includes an annular sealing groove disposed on the bearing body and a first sealing ring (4) embedded in the annular sealing groove.

3. The high-temperature molten salt pump bearing housing cooling water structure according to claim 2, characterized in that: The first sealing ring (4) is a standard O-ring or gasket, and its material is nitrile rubber or silicone rubber.

4. The high-temperature molten salt pump bearing housing cooling water structure according to claim 1, characterized in that: The inlet connector (2) and outlet connector (3) are fixed to the connecting plate of the bearing body with nuts (5).

5. The high-temperature molten salt pump bearing housing cooling water structure according to claim 1, characterized in that: The inlet connector (2), the outlet connector (3), and the welded pipe (8) are fixedly connected together by a second sealing ring (7) and a connecting nut (6), and can be disassembled by the connecting nut 6.

6. The high-temperature molten salt pump bearing housing cooling water structure according to claim 5, characterized in that: The second sealing ring (7) is a standard O-ring or gasket, made of nitrile rubber or silicone rubber.

7. The cooling water structure for the bearing housing of the high-temperature molten salt pump according to claim 1, characterized in that: The ends of the coil (1) and the inlet connector (2) and outlet connector (3) are fixedly connected by brazing or fusion welding.

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