External circulation cooling system for hydroelectric power station oil pumps

Abstract

This utility model relates to an external circulation cooling system for oil pumps in hydropower stations, comprising a base, an oil pump pipeline assembly structure, and an oil cooler pipeline assembly structure. Through integrated design, the oil pump pipeline assembly structure and the oil cooler pipeline assembly structure are centrally mounted on the base, significantly reducing the system's footprint and optimizing the space utilization of the power station. The connection between pipelines is achieved through flanges, simplifying the pipeline layout, reducing leakage risks, and improving the system's reliability and safety. Furthermore, the configuration of a dual filter and the combined opening and closing design of the first ball valve make switching of standby equipment more convenient, ensuring continuous operation of the system during maintenance or failure. The gate valve and second ball valve further enhance the system's flexibility, facilitating adjustments to the flow paths of oil and cooling water according to actual needs, improving overall operating efficiency, and facilitating daily inspection and maintenance, thus providing a strong guarantee for the stable operation of the hydropower station.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station oil pump cooling technology, and in particular to hydropower station oil pump external circulation cooling system. Background Technology

[0002] The external circulation cooling system of a hydro-generator set is crucial for ensuring the safe and stable operation of the bearings. It typically consists of components such as an oil pump, plate heat exchanger, filter, valves, and connecting pipelines.

[0003] A search revealed a patent number CN207334212U for an external circulation cooling device for generator bearing lubrication oil in hydropower station projects. This device comprises two oil pump motors, one oil filter, one oil cooler, one oval gear flow meter, a system control box, a bimetallic thermometer, a pressure switch, and necessary pipelines and valves. It uses a small programmable logic controller (PLC) as the control core, the oval gear flow meter as the precise monitoring element, and two oil pump motors as the actuators. Other temperature, pressure, and differential pressure signals are used as alarm signals. This device replaces existing mature products, improving portability, reliability, control flexibility, and system cost-effectiveness, fully meeting the requirements of hydropower station automation systems for external circulation cooling devices for generator bearing lubrication.

[0004] In traditional system layouts, equipment is typically installed in a distributed manner with on-site piping, which presents the following problems: complex piping routes and numerous joints, which not only makes installation time-consuming and labor-intensive but also increases the risk of leakage; the system occupies a large area, requiring high standards for power plant space planning; the equipment layout is loose, which is not conducive to daily inspection and maintenance; and the lack of integrated design makes it difficult to switch backup equipment, such as filters, affecting the reliability of continuous system operation. Utility Model Content

[0005] To address the problems inherent in existing patents that typically employ decentralized installation and on-site piping for equipment, such as complex piping routes and numerous joints leading to time-consuming and labor-intensive installations and increased leakage risks, this utility model provides an external circulation cooling system for hydropower station oil pumps.

[0006] The technical solution adopted in this utility model is: an external circulation cooling system for oil pumps in hydropower stations, comprising:

[0007] Base;

[0008] An oil pump pipeline assembly structure is installed on the top of the base;

[0009] An oil cooler piping assembly structure is installed on top of the base;

[0010] The oil pump pipeline assembly structure and the oil cooler pipeline assembly structure are connected by a flange.

[0011] Furthermore, the oil pump pipeline assembly structure includes a dual filter installed on the top of the base and an oil pump body connected to the dual filter through a first pipeline structure.

[0012] Furthermore, the first pipeline structure includes a first bracket mounted on the top of the base, a pipeline body mounted on the first bracket, and a first valve assembly mounted on the pipeline body, wherein the first valve assembly includes a check valve and a first ball valve.

[0013] Furthermore, there are multiple first ball valves, and their configuration is to switch the oil flow path through opening and closing combinations, so that one of the dual filters is put into operation, while the other is used as a backup or for isolation maintenance.

[0014] Furthermore, the oil cooler piping assembly structure includes a second bracket mounted on the top of the base and an oil cooler body, cooler piping mounted on the second bracket, and a second valve assembly mounted on the cooler piping, the second valve assembly including a gate valve and a second ball valve.

[0015] Furthermore, the cooler piping includes a water outlet pipe, an oil inlet pipe, and an oil outlet pipe mounted on the second bracket.

[0016] Furthermore, the oil inlet pipe and the oil outlet pipe are respectively connected to the oil pump pipeline assembly structure via the flange.

[0017] The beneficial effects of this utility model are:

[0018] Through integrated design, the oil pump pipeline assembly and the oil cooler pipeline assembly are centrally mounted on the base, significantly reducing the system's footprint and optimizing the power station's space utilization. Connectivity between pipelines is achieved via flanges, simplifying the pipeline layout, reducing leakage risks, and improving system reliability and safety. Furthermore, the configuration of the dual filter and the combined opening and closing design of the first ball valve make switching to standby equipment more convenient, ensuring continuous operation during maintenance or failures. The gate valve and second ball valve further enhance system flexibility, facilitating adjustments to the flow paths of oil and cooling water according to actual needs, thereby improving overall operating efficiency. This design not only facilitates daily inspection and maintenance but also significantly shortens installation time, providing strong support for the stable operation of the hydropower station. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the oil pump pipeline assembly structure in this utility model;

[0020] Figure 2 This is a top view schematic diagram of the oil pump pipeline assembly structure in this utility model;

[0021] Figure 3 This is a utility model Figure 1 Partial left-view diagram;

[0022] Figure 4 This is a utility model Figure 2 Schematic diagram of AA section in the middle;

[0023] Figure 5 This is a top view schematic diagram of the oil cooler pipeline assembly structure of this utility model;

[0024] Figure 6 This is a utility model Figure 5 Schematic diagram of the BB cross section in the middle;

[0025] Figure 7 This is a schematic diagram of the oil cooler body and cooler piping in this utility model;

[0026] Figure 8 This is a utility model Figure 5 A schematic diagram of the CC cross-section.

[0027] The diagram is marked as follows:

[0028] 1. Base;

[0029] 2. Oil pump pipeline assembly structure; 201. Dual filter; 202. First pipeline structure; 2021. First support; 2022. Pipeline body; 2023. First valve group; 203. Oil pump body;

[0030] 3. Oil cooler piping assembly structure; 301. Second support; 302. Oil cooler body; 303. Cooler piping; 3031. Water outlet pipe; 3032. Oil inlet pipe; 3033. Water inlet pipe; 3034. Oil outlet pipe; 304. Second valve assembly;

[0031] 4. Flange;

[0032] 5. Check valve; 6. First ball valve; 7. Second ball valve. Detailed Implementation

[0033] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described below.

[0036] To address the problems existing in the background art, this application proposes the following technical solution:

[0037] The external circulation cooling system for the oil pump of the hydropower station includes: a base 1, an oil pump pipeline assembly structure 2, and an oil cooler pipeline assembly structure 303;

[0038] The oil pump pipeline assembly structure 2 is installed on the top of the base 1;

[0039] The oil cooler piping 303 housing structure 3 is installed on the top of the base 1;

[0040] The oil pump pipeline assembly 2 and the oil cooler pipeline assembly 303 are connected by a flange 4.

[0041] Furthermore, the oil pump pipeline assembly structure 2 includes a dual filter 201 installed on the top of the base 1 and an oil pump body 203 connected to the dual filter 201 through a first pipeline structure 202. The first pipeline structure 202 includes a first bracket 2021 installed on the top of the base 1, a pipeline body 2022 installed on the first bracket 2021, and a first valve group 2023 installed on the pipeline body 2022. The first valve group 2023 includes a check valve 5 and a first ball valve 6.

[0042] Furthermore, there are multiple first ball valves 6, which are configured to switch the oil flow path through opening and closing combinations, so that one of the dual filters 201 is put into operation while the other is used as a backup or for isolation maintenance.

[0043] In practical applications, the system's ease of operation has been further improved. By rationally arranging the positions of each component, the daily inspection route becomes clearer, reducing the inspection time for staff.

[0044] To enhance the system's adaptability, the design of the oil cooler body 302 and the cooler piping 303 fully considers the changing needs under different operating conditions. The diameters of the inlet pipe 3033 and the outlet pipe 3031 are precisely calculated to ensure efficient heat exchange under various flow conditions. The second valve group 304 installed on the cooler piping 303 allows operators to flexibly adjust the water flow direction and speed according to actual conditions, thereby optimizing cooling efficiency.

[0045] The installation method of the dual filter 201 is convenient for disassembly, cleaning or replacement of the filter element. The check valve 5 and the first ball valve 6 in the first pipeline structure 202 are made of corrosion-resistant materials, which extends the service life and reduces the maintenance frequency.

[0046] Furthermore, the oil cooler piping 303 assembly structure 3 includes a second bracket 301 mounted on the top of the base 1 and an oil cooler body 302, a cooler piping 303 mounted on the second bracket 301 and a second valve assembly 304 mounted on the cooler piping 303. The second valve assembly 304 includes a gate valve and a second ball valve 7.

[0047] Furthermore, the oil inlet pipe 3032 and the oil outlet pipe 3034 are respectively connected to the oil pump pipeline assembly structure 2 via flange 4.

[0048] Working Principle: During operation, the oil pump body 203 is first started. Oil enters through the dual filter 201, undergoes preliminary filtration and flow control through the first pipeline structure 202. By adjusting the states of the check valve 5 and the first ball valve 6 in the first valve group 2023, the oil is ensured to flow along a predetermined path. The operating mode of the dual filter 201 is switched according to actual needs, ensuring one filter operates normally while the other is in standby or maintenance mode. Subsequently, the oil flows through the flange 4 into the oil cooler pipeline 303 housing structure 3. During this process, the oil sequentially passes through the inlet pipe 3032 and the outlet pipe 3034. The second valve group 304 on the cooler pipeline 303 precisely controls the oil flow rate and direction through the cooperation of the gate valve and the second ball valve 7, ensuring optimal cooling effect. After cooling is complete, the oil returns to the system circulation, thus achieving stable operation of the entire external circulation cooling process. This design not only simplifies the pipeline layout but also significantly reduces the risk of leakage, improving system reliability and ease of maintenance.

[0049] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0050] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. An external circulation cooling system for an oil pump in a hydropower station, characterized in that, include: Base (1); Oil pump pipeline assembly structure (2), the oil pump pipeline assembly structure (2) is installed on the top of the base (1); Oil cooler piping (303) housing structure (3), the oil cooler piping (303) housing structure (3) is installed on the top of the base (1); The oil pump pipeline assembly structure (2) and the oil cooler pipeline assembly structure (3) are connected by a flange (4).

2. The external circulation cooling system for hydropower station oil pumps according to claim 1, characterized in that, The oil pump pipeline assembly structure (2) includes a dual filter (201) installed on the top of the base (1) and an oil pump body (203) connected to the dual filter (201) through a first pipeline structure (202).

3. The external circulation cooling system for hydropower station oil pumps according to claim 2, characterized in that, The first pipeline structure (202) includes a first bracket (2021) mounted on the top of the base (1), a pipeline body (2022) mounted on the first bracket (2021), and a first valve group (2023) mounted on the pipeline body (2022). The first valve group (2023) includes a check valve (5) and a first ball valve (6).

4. The external circulation cooling system for hydropower station oil pumps according to claim 3, characterized in that, The number of the first ball valve (6) is multiple, and its configuration is to switch the oil flow path by opening and closing combination, so that one of the dual filters (201) is put into operation, and the other is used as a standby or for isolation maintenance.

5. The external circulation cooling system for hydropower station oil pumps according to claim 1, characterized in that, The oil cooler pipeline (303) assembly structure (3) includes a second bracket (301) mounted on the top of the base (1) and an oil cooler body (302), a cooler pipeline (303) mounted on the second bracket (301) and a second valve group (304) mounted on the cooler pipeline (303), the second valve group (304) including a gate valve and a second ball valve (7).

6. The external circulation cooling system for hydropower station oil pumps according to claim 5, characterized in that, The cooler piping (303) includes a water outlet pipe (3031), an oil inlet pipe (3032), a water inlet pipe (3033), and an oil outlet pipe (3034) mounted on the second bracket (301).

7. The external circulation cooling system for hydropower station oil pumps according to claim 6, characterized in that, The oil inlet pipe (3032) and the oil outlet pipe (3034) are respectively connected to the oil pump pipeline assembly structure (2) through the flange (4).

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