Backwashing device for generator filter

Abstract

The invention discloses a backwashing device for a generator filter, and belongs to the technical field of filtering equipment. The filter shell is provided with a water inlet pipe and a water outlet pipe; the filtering assembly comprises a rotatable filtering cylinder, the upper end and the lower end of the filtering cylinder are in sliding connection with the inner wall of the filter shell, the filtering cylinder can rotate around the axis of the filtering cylinder, a sewage cavity communicated with the water inlet pipe is formed in the filtering cylinder, and a purified water cavity communicated with the water outlet pipe is formed by the filtering cylinder and the inner wall of the filter shell; the flushing unit comprises a water spraying pipe, the two ends of the water spraying pipe are fixedly connected with the inner wall of the filter shell respectively, a nozzle opposite to the outer wall of the filter cartridge is arranged on the water spraying pipe, and an inner cavity of the water spraying pipe is communicated with a water source through a pipeline. The filter can be backwashed, and the cleaning effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, and in particular to a backwashing device for a generator filter. Background Art

[0002] A hydropower station is a comprehensive engineering facility that converts water energy into electrical energy. It generally includes a reservoir formed by water retaining and water discharge structures, a water diversion system for the hydropower station, a power plant, and electromechanical equipment. The high water level of the reservoir flows into the power plant through the water diversion system to drive the turbine generator set to generate electricity, which is then input into the power grid through step-up transformers, switch stations, and transmission lines.

[0003] During the operation of a hydropower station, it is necessary to continuously cool down the high-speed rotating hydroelectric generator to prevent the hydroelectric generator from malfunctioning due to overheating. The cooling water of the existing hydroelectric generator needs to be filtered to prevent impurities from clogging the circulation pipeline. However, after long-term use, the filter device is easily clogged and cannot be effectively cleaned, which will reduce the filtration efficiency.

[0004] Existing filters are not effective in cleaning debris and are difficult to clean online. Summary of the invention

[0005] In view of this, it is necessary to provide a backwashing device for a generator filter to solve the problem of poor cleaning effect of the existing filter.

[0006] The present invention provides a backwashing device for a generator filter, comprising: The filter housing is provided with a water inlet pipe and a water outlet pipe; The filter assembly comprises a rotatable filter cartridge, the upper and lower ends of which are slidably connected to the inner wall of the filter housing and can rotate around its own axis, the interior of the filter cartridge forms a sewage cavity connected to the water inlet pipe, and the filter cartridge and the inner wall of the filter housing form a clean water cavity connected to the water outlet pipe; The flushing unit comprises a water spray pipe, both ends of which are fixedly connected to the inner wall of the filter housing, a nozzle arranged relative to the outer wall of the filter cartridge is arranged on the water spray pipe, and the inner cavity of the water spray pipe is connected to a water source through a pipeline.

[0007] Furthermore, a filter cartridge drive assembly is provided on the filter housing, and the filter cartridge drive assembly includes a drive motor, a transmission shaft and a connecting bracket. The drive motor is connected to the top of the filter housing, the connecting bracket is connected to the inner wall of the filter cartridge, one end of the transmission shaft is connected to the output end of the drive motor, and the other end of the transmission shaft is connected to the connecting bracket via the filter housing.

[0008] Furthermore, both ends of the filter cartridge are connected to the inner wall of the filter housing via a thrust bearing, and the thrust bearing is sealed relative to the sewage chamber and the clean water chamber.

[0009] Furthermore, the filter cartridge includes a grid frame and a filter screen, wherein the filter screen is enclosed on the inner wall of the grid frame, and both ends of the grid frame are connected to the end surface of the thrust bearing.

[0010] Furthermore, the filter screen is a polyester fiber filter screen.

[0011] Furthermore, a sewage hopper is provided at the lower part of the filter housing, the inner cavity of the sewage hopper is communicated with the sewage cavity, and the water inlet pipe is communicated with the sewage cavity via the sewage hopper.

[0012] Furthermore, a sewage discharge unit is provided below the sewage discharge bucket, and the sewage discharge unit includes a sewage discharge pipe and a stopcock. One end of the sewage discharge pipe is connected to the bottom end of the sewage discharge bucket, and the stopcock is screwed to the other end of the sewage discharge pipe.

[0013] Furthermore, the water spray pipe is arranged parallel to the axis of the filter cartridge, and the water spray pipe is spaced apart from the outer wall of the filter cartridge.

[0014] Furthermore, the plurality of nozzles are arranged equidistantly along the length direction of the water spray pipe, and the spraying direction of each nozzle is arranged perpendicular to the cross-section of the filter cartridge.

[0015] Furthermore, the water inlet pipe and the water outlet pipe are arranged alternately, the water inlet pipe is located at the lower part of the filter housing, and the water outlet pipe is located at the upper part of the filter housing.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) A backwashing device for a generator filter of the present invention comprises a rotatable filter cartridge disposed in a filter housing, wherein the upper and lower ends of the filter cartridge are slidably connected to the inner wall of the filter housing and can rotate around its own axis. During the self-rotation of the filter cartridge, impurities attached to the filter cartridge can be thrown off by the filter cartridge, and the filter cartridge can perform preliminary cleaning on itself to prevent the accumulation of impurities and maintain the filtering efficiency.

[0017] (2) A backwashing device for a generator filter of the present invention comprises a water spray pipe arranged in the filter housing, both ends of the water spray pipe are respectively fixedly connected to the inner wall of the filter housing, and a nozzle arranged relative to the outer wall of the filter cartridge is provided on the water spray pipe, and the nozzle can spray high-pressure water flow toward the outer wall of the filter cartridge. When the filter cartridge rotates, the continuously ejected high-pressure water flow cleans away impurities attached to the inner wall of the filter cartridge, thereby enhancing the cleaning effect of the filter cartridge and restoring the filtering efficiency of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the main structure of the present invention as a whole; Figure 2 It is a schematic diagram of the overall structure of the present invention from a top view; Figure 3 It is a structural schematic diagram of the water spray pipe in the present invention; In the figure, the filter housing 100, the water inlet pipe 110, the water outlet pipe 120, the sewage bucket 130, the sewage unit 140, the sewage pipe 141, the stopcock 142, the filter assembly 200, the filter cartridge 210, the grid 211, the filter net 212, the sewage chamber 220, the clean water chamber 230, the flushing unit 300, the water spray pipe 310, the nozzle 311, the filter cartridge drive assembly 400, the drive motor 410, the transmission shaft 420, and the connecting bracket 430. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0019] See also Figures 1 to 3 In this embodiment, a backwashing device for a generator filter includes: a filter housing 100, a filter assembly 200 and a flushing unit 300 disposed in the filter housing 100. The filter assembly 200 separates impurities in the water body, and the filtered cooling water cools the cooler of the generator. The flushing assembly backwashes the filter assembly 200 to clean the impurities attached to the filter assembly 200 and restore the filtering capacity of the filter assembly 200.

[0020] The filter housing 100 is provided with a water inlet pipe 110 and a water outlet pipe 120 , and both the water inlet pipe 110 and the water outlet pipe 120 are communicated with the interior of the filter housing 100 .

[0021] The filter assembly 200 includes a rotatable filter cartridge 210, the upper and lower ends of which are slidably connected to the inner wall of the filter housing 100 and can rotate around its own axis. During the self-rotation of the filter cartridge 210, impurities attached to the filter cartridge 210 can be thrown off by the filter cartridge 210, and the filter cartridge 210 can perform preliminary cleaning on itself to prevent the accumulation of impurities and maintain the filtration efficiency of the water body. A sewage chamber 220 connected to the water inlet pipe 110 is formed inside the filter cartridge 210, and the filter cartridge 210 and the inner wall of the filter housing 100 form a clean water chamber 230 connected to the water outlet pipe 120. The water body with impurities entering from the water inlet pipe 110 enters the sewage chamber 220, and the water body in the sewage chamber 220 passes through the filter cartridge 210 and enters the clean water chamber 230 to obtain relatively clean clean water, which is transported to the cooler via the water outlet pipe 120. Impurities in the water body are isolated in the sewage chamber 220, so that the impurities gather in the water chamber 220.

[0022] The flushing unit 300 includes a water spray pipe 310, both ends of which are fixedly connected to the inner wall of the filter housing 100, and a nozzle 311 is arranged on the water spray pipe 310 relative to the outer wall of the filter cartridge 210. The nozzle 311 can spray high-pressure water flow to the outer wall of the filter cartridge 210. When the filter cartridge rotates, the continuously ejected high-pressure water flow cleans up the impurities attached to the inner wall of the filter cartridge 210, thereby preventing the impurities from clogging the filter cartridge 210 and affecting the filtering capacity of the filter cartridge 210. The inner cavity of the water spray pipe 310 is connected to a water source through a pipeline, and the water source can provide clean high-pressure water to the water spray pipe 310.

[0023] See also Figure 1 The filter housing 100 is provided with a filter cartridge drive assembly 400, which includes a drive motor 410, a transmission shaft 420, and a connecting bracket 430. The housing of the drive motor 410 is connected to the top of the filter housing 100, the connecting bracket 430 is connected to the inner wall of the filter cartridge 210, one end of the transmission shaft 420 is connected to the output end of the drive motor 410, and the other end of the transmission shaft 420 passes through the filter housing 100 and is connected to the connecting bracket 430. In the specific implementation process, the drive motor 410 drives the transmission shaft 420 to rotate, and the transmission shaft 420 drives the filter cartridge 210 to rotate through the connecting bracket 430, so that the impurities attached to the inner wall of the filter cartridge 210 are removed, and the filtering capacity of the filter cartridge 210 is restored.

[0024] Please continue reading Figure 1The two ends of the filter cartridge 210 are connected to the inner wall of the filter housing 100 through thrust bearings. The thrust bearings are sealed relative to the sewage chamber 220 and the clean water chamber 230. A ball bearing is provided in the middle of the thrust bearing. The ball bearing can reduce the friction between the filter cartridge 210 and the filter housing 100, making the rotation of the filter cartridge 210 smoother. At the same time, the thrust bearings are relatively sealed on both sides of the radial direction, so that water cannot flow from the thrust bearings, and sewage cannot directly enter the clean water chamber 230.

[0025] See also Figure 1 and Figure 2 The filter cylinder 210 includes a grid frame 211 and a filter screen 212. The filter screen 212 is enclosed and arranged on the inner wall of the grid frame 211. The two ends of the grid frame 211 are connected to the end face of the thrust bearing. In the specific implementation process, the grid frame 211 is specifically a stainless steel mesh cylinder, and a plurality of through holes are provided on the mesh cylinder. The stainless steel mesh cylinder has high hardness and strength, and can support the filter screen 212. The two ends of the grid frame 211 are connected to the metal circular ring, and the end face of the circular ring is connected to the thrust bearing. The grid frame 211 can rotate with the help of the thrust bearing. The filter screen 212 is cylindrical, and the filter screen 212 is inserted into the interior of the grid frame 211 and is connected to the inner wall of the grid frame 211 by interference fit.

[0026] It should be noted that the filter screen 212 is a polyester fiber filter screen, which has good filtering ability and long service life.

[0027] See also Figure 1 A sewage hopper 130 is provided at the lower part of the filter housing 100, and the inner cavity of the sewage hopper 130 is connected to the sewage cavity 220, and the water inlet pipe 110 is connected to the sewage cavity 220 via the sewage hopper 130. Impurities in the water body can be accumulated in the sewage hopper 130, so that the impurity accumulation body is away from the filter cartridge 210, reducing the negative impact of the filtered impurities on the filter cartridge 210. As a further embodiment, a sewage discharge unit 140 is provided below the sewage hopper 130, and the sewage discharge unit 140 includes a sewage discharge pipe 141 and a cock 142, one end of the sewage discharge pipe 141 is connected to the bottom end of the sewage hopper 130, and the cock 142 is screwed to the other end of the sewage discharge pipe 141. By controlling the cock 142, the enriched impurities can be discharged in time.

[0028] See also Figure 1 and Figure 3The water spray pipe 310 is arranged parallel to the axis of the filter cartridge 210. The water spray pipe 310 can simultaneously flush one side of the filter cartridge 210. The water spray pipe 310 is arranged at intervals from the outer wall of the filter cartridge 210. The interval is 1-3 times the diameter of the water spray pipe 310. If the water spray pipe 310 is too far from the filter cartridge 210, the pressure of the sprayed water flow will be excessively lost, and the cleaning effect will be poor. If the water spray pipe 310 is too close to the filter cartridge 210, the nozzle 311 is likely to interfere with the filter cartridge 210, hindering the rotation of the filter cartridge 210.

[0029] Multiple nozzles 311 are equidistantly arranged along the length direction of the water spray pipe 310, and the spray direction of each nozzle 311 is perpendicular to the cross section of the filter cartridge 210. The spray direction of the nozzle 311 is perpendicular to the cross section of the filter cartridge 210 to obtain the maximum impact force and achieve the best reverse cleaning effect on the filter cartridge 210.

[0030] See also Figure 1 The water inlet pipe 110 and the water outlet pipe 120 are arranged alternately, the water inlet pipe 110 is located at the lower part of the filter housing 100, and the water outlet pipe 120 is located at the upper part of the filter housing 100. The water entering from the water inlet pipe 110 can be discharged from the water outlet pipe 120 only after filling the entire sewage chamber 220, so that the sewage chamber 220 and the clean water chamber 230 can be filled during use, and the filter can be fully used.

[0031] Working process: External water is input into the sewage chamber 220 from the water inlet pipe 110, and the water in the sewage chamber 220 enters the clean water chamber 230 after being filtered by the filter cartridge 210. The filter cartridge 210 rotates continuously under the drive of the motor to reduce the adhesion of impurities. After the filter cartridge 210 has worked for a period of time, the water spray pipe 310 is opened, and high-pressure water flows from the nozzle 311 to flush the filter cartridge 210 from the outside to the inside. The impurities flushed down gather in the sewage bucket 130 and are discharged from the sewage pipe 141.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A backwashing device for a generator filter, characterized in that: include: The filter housing is provided with a water inlet pipe and a water outlet pipe; The filter assembly comprises a rotatable filter cartridge, the upper and lower ends of which are slidably connected to the inner wall of the filter housing and can rotate around its own axis, the interior of the filter cartridge forms a sewage cavity connected to the water inlet pipe, and the filter cartridge and the inner wall of the filter housing form a clean water cavity connected to the water outlet pipe; The flushing unit comprises a water spray pipe, both ends of which are fixedly connected to the inner wall of the filter housing, a nozzle arranged relative to the outer wall of the filter cartridge is arranged on the water spray pipe, and the inner cavity of the water spray pipe is connected to a water source through a pipeline.

2. A backwashing device for a generator filter according to claim 1, characterized in that: A filter cartridge drive assembly is provided on the filter housing, and the filter cartridge drive assembly includes a drive motor, a transmission shaft and a connecting bracket. The drive motor is connected to the top of the filter housing, the connecting bracket is connected to the inner wall of the filter cartridge, one end of the transmission shaft is connected to the output end of the drive motor, and the other end of the transmission shaft is connected to the connecting bracket via the filter housing.

3. A backwashing device for a generator filter according to claim 2, characterized in that: Both ends of the filter cartridge are connected to the inner wall of the filter housing through thrust bearings, and the thrust bearings are sealed relative to the sewage cavity and the clean water cavity.

4. A backwashing device for a generator filter according to claim 3, characterized in that: The filter cartridge comprises a mesh frame and a filter screen, wherein the filter screen is enclosed on the inner wall of the mesh frame, and both ends of the mesh frame are connected to the end surface of the thrust bearing.

5. A backwashing device for a generator filter according to claim 4, characterized in that: The filter screen is a polyester fiber filter screen.

6. A backwashing device for a generator filter according to claim 1, characterized in that: A sewage hopper is provided at the lower part of the filter housing, the inner cavity of the sewage hopper is communicated with the sewage cavity, and the water inlet pipe is communicated with the sewage cavity via the sewage hopper.

7. A backwashing device for a generator filter according to claim 6, characterized in that: A sewage discharge unit is provided below the sewage discharge bucket, and the sewage discharge unit comprises a sewage discharge pipe and a cock. One end of the sewage discharge pipe is connected to the bottom end of the sewage discharge bucket, and the cock is screwed to the other end of the sewage discharge pipe.

8. A backwashing device for a generator filter according to claim 1, characterized in that: The water spray pipe is arranged parallel to the axis of the filter cartridge, and the water spray pipe is spaced apart from the outer wall of the filter cartridge.

9. A backwashing device for a generator filter according to claim 8, characterized in that: The plurality of nozzles are arranged equidistantly along the length direction of the water spray pipe, and the spraying direction of each nozzle is arranged perpendicular to the cross section of the filter cartridge.

10. A backwashing device for a generator filter according to claim 1, characterized in that: The water inlet pipe and the water outlet pipe are arranged alternately, the water inlet pipe is located at the lower part of the filter housing, and the water outlet pipe is located at the upper part of the filter housing.

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