Stator cooling water filter for power plant

Abstract

The utility model discloses a power plant stator cooling water filter screen, including the water inlet end cover and sealing end cover with water inlet, install the filter filter core between water inlet end cover and sealing end cover, and the filter filter core includes outer frame, inner frame and stainless steel sintered filter screen, and the stainless steel sintered filter screen is pressed between outer frame and inner frame, and the barrel of outer frame and inner frame all is provided with a plurality of mesh holes, and the water inlet is communicated with the inner chamber of inner frame. The utility model has the beneficial effects that: the filter filter core adopts the combined structure of outer frame, stainless steel sintered filter screen and inner frame, guarantees the mechanical strength and wear resistance of whole filter filter core, and then guarantees the service life of filter filter core, avoids the debris to enter the stator cooling water system and lubricating oil system, thereby guarantees the reliability of stator cooling water system and lubricating oil system use.

Description

Technical Field

[0001] This utility model relates to cooling water filter screens, and in particular to a power plant stator cooling water filter screen. Background Technology

[0002] The main functions of filters in power plant stator cooling water systems include: 1. Filtering impurities: Filters effectively remove particles, sand, rust, and other impurities from the cooling water, preventing damage to the stator; 2. Protecting equipment: By filtering out tiny particles and contaminants from the cooling water, filters protect the stator and cooling system, extending equipment lifespan; 3. Improving efficiency: Regularly replacing filter elements ensures normal stator cooling and operation, reducing maintenance and replacement costs; 4. Maintaining water quality: During normal system operation, the ion exchanger recirculates a small amount (3%-5%) of stator cooling water to reduce the conductivity of the cooling water, maintaining the system conductivity at its set operating value. However, for power plant stators, a stator internal cooling water backwashing system is also required. This involves regularly backwashing the stator bars, periodically inspecting and cleaning the filter screens. During backwashing, the filter screens are easily damaged by pressure and rust. Damaged or rusted debris entering the stator cooling water system and lubrication system can cause incalculable consequences.

[0003] After a long period of research, the inventor proposed a cooling water filter. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a power plant stator cooling water filter. This utility model achieves its purpose through the following technical solution: A power plant stator cooling water filter includes an inlet end cap with a water inlet and a sealing end cap. A filter element is installed between the inlet end cap and the sealing end cap. The filter element includes an outer frame, an inner frame, and a stainless steel sintered filter screen. The stainless steel sintered filter screen is tightly pressed between the outer frame and the inner frame. Both the outer frame and the inner frame have several mesh openings on their cylindrical bodies. The water inlet communicates with the inner cavity of the inner frame. Optionally, several reinforcing rings are fitted onto the outer frame, and the reinforcing rings are spaced apart in the axial direction. Optionally, the reinforcing rings and the outer frame are clearance-fitted, and the reinforcing rings and the outer frame are fixedly connected by strip welding. Optionally, there is only one reinforcing ring, located in the middle of the outer frame. Optionally, an annular mounting groove is opened on the front end face of the sealing end cap, and the rear end of the filter element is installed in the annular mounting groove.

[0005] Optionally, the outer side of the outer frame is welded to the front end face of the sealing end cap, and the inner side of the inner frame is welded to the front end face of the sealing end cap.

[0006] Connecting. Optionally, an installation step is provided on the rear end face of the water inlet end cover, the front end of the filter element is installed on the installation step, and the outer side of the outer frame is welded to the rear end face of the water inlet end cover, while the inner side of the inner frame is flush with the inner side of the water inlet end cover.

[0007] The present invention has the following advantages: The power plant stator cooling water filter of the present invention adopts a combined structure of an outer skeleton, a stainless steel sintered filter screen and an inner skeleton, which ensures the mechanical strength and wear resistance of the entire filter element, thereby ensuring the service life of the filter element and preventing debris from entering the stator cooling water system and lubrication oil system, thus ensuring the reliability of the stator cooling water system and lubrication oil system. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the structure of this utility model;

[0009] Figure 2 is an enlarged view of point A in Figure 1;

[0010] In the diagram, 1-inlet cap, 2-sealing cap, 3-reinforcing ring, 4-outer frame, 5-inner frame, 6-stainless steel sintered filter screen.

[0011] 7-Water inlet, 8-Annular mounting groove, 9-Mounting step. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be combined with the embodiments of this utility model.

[0013] The accompanying drawings clearly and completely describe the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claims.

[0015] This description does not extend to the scope of the present invention, but merely indicates selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention may be used interchangeably.

[0017] The components are combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These 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. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should also be noted that, unless otherwise expressly specified and limited, the term "setting,"

[0019] The terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0020] As shown in Figures 1 and 2, a power plant stator cooling water filter includes an inlet end cap 1 with an inlet 7 and a sealing end cap 2. Both the inlet end cap 1 and the sealing end cap 2 are rotating structures. A filter element is installed between the inlet end cap 1 and the sealing end cap 2. The filter element includes an outer frame 4, an inner frame 5, and a stainless steel sintered filter screen 6. The stainless steel sintered filter screen 6 is tightly pressed between the outer frame 4 and the inner frame 5. The outer frame 4 and the inner frame 5 each have several mesh openings on their cylindrical bodies. The inlet 7 communicates with the inner cavity of the inner frame 5. In this embodiment, the stainless steel sintered filter screen 6... As a commercially available product, it boasts advantages such as high strength, high filtration efficiency, and low flow resistance, making it easy to clean and backwash. Furthermore, the stainless steel sintered mesh is a new type of filter material made from multi-layered woven metal wire mesh through special lamination pressing and vacuum sintering processes. It possesses high mechanical strength and overall rigidity. The mesh openings of each layer of wire mesh are interwoven, forming a uniform and ideal filtration structure. This not only overcomes the shortcomings of ordinary metal wire mesh, such as low strength, poor rigidity, unstable mesh shape, and wire breakage, but also allows for reasonable matching and design of the material's pore size, permeability, and strength characteristics. This results in excellent filtration accuracy, filtration resistance, mechanical strength, wear resistance, heat resistance, and processability. The detailed manufacturing process and structure are existing technologies and will not be elaborated upon further. In this embodiment, the stainless steel sintered filter mesh 6 is tightly pressed onto the outer frame 4 and the inner frame 5. During both rinsing and backwashing, it maintains excellent filtration accuracy and resistance, thus ensuring the mechanical strength and wear resistance of the entire filter element and guaranteeing its service life. It also prevents debris from entering the cooling water system and lubrication system, thereby ensuring the reliability of the cooling water system and lubrication system.

[0021] In this embodiment, as shown in Figure 1, a plurality of reinforcing rings 3 are fitted onto the outer frame 4. The reinforcing rings 3 are spaced apart in the axial direction. Furthermore, there is only one reinforcing ring 3, located in the middle of the outer frame 4. The reinforcing ring 3 increases the structural strength of the entire filter element. Furthermore, the reinforcing ring 3 and the outer frame 4 are fitted with a gap, and the reinforcing ring 3 and the outer frame 4 are fixedly connected by strip welding. During installation, the reinforcing ring 3 can be easily fitted onto the outer frame 4 and can be easily moved to the middle of the reinforcing ring 3. The strip welding connection between the reinforcing ring 3 and the outer frame 4 ensures the structural strength between the reinforcing ring 3 and the outer frame 4, and also prevents the outer frame 4 covered by the inner side of the reinforcing ring 3 from being blocked by weld spatter. Moreover, the gap fit between the reinforcing ring 3 and the outer frame 4 means that there is a gap between the reinforcing ring 3 and the outer frame 4. Therefore, the outer frame 4 covered by the inner side of the reinforcing ring 3 still has the filtration function, thereby ensuring the filtration efficiency.

[0022] In this embodiment, as shown in Figure 1, an annular mounting groove 8 is provided on the front end face of the sealing end cap 2, and the rear end of the filter element is installed in the annular mounting groove 8. Furthermore, the outer side of the outer frame 4 is welded to the front end face of the sealing end cap, and the inner side of the inner frame 5 is welded to the front end face of the sealing end cap, thereby ensuring the reliability of the installation of the filter element and the sealing end cap 2.

[0023] In this embodiment, as shown in Figure 1, an installation step 9 is provided on the rear end face of the water inlet end cover 1. The front end of the filter element is installed on the installation step 9, and the outer side of the outer frame 4 is welded to the rear end face of the water inlet end cover 1, thereby ensuring the reliability of the installation of the water inlet end cover 1 and the filter element. The inner side of the inner frame 5 is flush with the inner side of the water inlet end cover 1, so that no step difference is formed between the inner side of the inner frame 5 and the inner side of the water inlet end cover 1, thereby ensuring that the flushing water or backwash water can flow smoothly.

[0024] The working process of this utility model is as follows: During rinsing, stator cooling water enters from the inlet 7 and then passes through the inner frame 5, the stainless steel sintered filter screen 6, and the outer frame 4 in sequence to filter impurities in the cooling water, thereby ensuring the cleanliness of the cooling water and the reliability of the power plant stator cooling. During backwashing, the rinsing water passes through the outer frame 4, the stainless steel sintered filter screen 6, and the inner frame 5 in sequence, and finally exits from the inlet 7, thereby allowing the rinsing water to carry away impurities on the surface and inside the inner frame 5, thus ensuring the service life and reliability of the filter element.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power plant stator cooling water filter screen, characterized in that: It includes an inlet end cap with a water inlet and a sealing end cap. A filter element is installed between the inlet end cap and the sealing end cap. The filter element includes an outer frame, an inner frame and a stainless steel sintered filter screen. The stainless steel sintered filter screen is tightly pressed between the outer frame and the inner frame. The outer frame and the inner frame are provided with a number of mesh holes. The water inlet is connected to the inner cavity of the inner frame.

2. The power plant stator cooling water filter screen according to claim 1, characterized in that: The outer frame is fitted with several reinforcing rings, which are spaced apart in the axial direction.

3. A power plant stator cooling water filter screen according to claim 2, characterized in that: The reinforcing ring and the outer frame are fitted with a clearance fit, and the reinforcing ring and the outer frame are fixedly connected by strip welding.

4. A power plant stator cooling water filter screen according to claim 3, characterized in that: There is one reinforcing ring, which is located in the middle of the outer frame.

5. A power plant stator cooling water filter screen according to any one of claims 1 to 4, characterized in that: An annular mounting groove is provided on the front end face of the sealing end cap, and the rear end of the filter element is installed in the annular mounting groove.

6. A power plant stator cooling water filter screen according to claim 5, characterized in that: The outer side of the outer frame is welded to the front end face of the sealing end cap, and the inner side of the inner frame is welded to the front end face of the sealing end cap.

7. A power plant stator cooling water filter screen according to claim 6, characterized in that: An installation step is provided on the rear end face of the water inlet end cover. The front end of the filter element is installed on the installation step. The outer side of the outer frame is welded to the rear end face of the water inlet end cover, and the inner side of the inner frame is flush with the inner side of the water inlet end cover.

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