Multistage grid structure of circulating cooling water intake of nuclear power station

Abstract

The utility model discloses a multistage grid structure of a circulating cooling water intake of a nuclear power station, which comprises a frame and a perforated sieve plate, a driving motor is fixedly mounted at the upper end of the frame, driving chain wheel shafts are movably mounted in the upper end and the lower end of the frame, one end of the driving chain wheel shaft at the upper end of the frame extends to the outside of the frame, and the perforated sieve plate is fixedly mounted on the frame. Chain wheels are fixedly arranged on the surface, close to the two ends, of the driving chain wheel shaft in the frame in a sleeving mode, a transmission chain is arranged between the chain wheels at the upper end and the lower end in the frame in a sleeving mode, a perforated sieve plate is fixedly installed on the transmission chain, and a brush motor is arranged behind the upper end of the frame. According to the multistage grating structure of the circulating cooling water intake of the nuclear power station, small impurities, especially strip-shaped or linear impurities, can be better filtered, the perforated sieve plate can be processed by adopting a punch forming method, the efficiency is high, and meanwhile, the strength of the multistage grating is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a multi-stage grid structure for a circulating cooling water intake of a nuclear power station. Background Art

[0002] Nuclear power plants need to be cooled during operation, and the water used to cool nuclear power plants is water from nature. When extracting water from nature, impurities such as seaweed, jellyfish, fish and plastic bottles in the water will be extracted together, so rake teeth screens will be used to filter the extracted water.

[0003] The aperture of the traditional rake-tooth type grille is relatively large, and it cannot effectively filter linear and strip-shaped foreign matter. In addition, the traditional rake-tooth type grille is not strong enough during the circulation motion and is prone to breakage and separation. Utility Model Content

[0004] The main purpose of the utility model is to provide a multi-stage grid structure for a circulating cooling water intake of a nuclear power plant, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A multi-stage grid structure for a circulating cooling water intake of a nuclear power plant comprises a frame and a perforated sieve plate, wherein a drive motor is fixedly mounted on the upper end of the frame, and drive sprocket shafts are movably mounted inside the upper and lower ends of the frame, one end of the drive sprocket shaft at the upper end of the frame extends outside the frame, sprockets are fixedly sleeved on the surface of the drive sprocket shaft inside the frame and near both ends, a transmission chain is sleeved between the sprockets at the upper and lower ends of the frame, a perforated sieve plate is fixedly mounted on the transmission chain, and a brush motor is provided at the rear of the upper end of the frame.

[0007] Preferably, the output end of the driving motor and the surface of the external driving sprocket shaft of the frame are also fixedly sleeved with sprockets, and the sprockets of the driving motor and the external driving sprocket shaft of the frame are also sleeved with transmission chains.

[0008] Preferably, a brush is fixedly mounted on the output end of the brush motor, and the brush is in contact with the perforated screen plate.

[0009] Preferably, the perforated sieve plate includes a sieve plate, a No. 1 ear plate, a No. 2 ear plate and rake teeth, the upper end of the sieve plate is bent with a No. 1 ear plate, the lower end of the sieve plate is bent with a No. 2 ear plate, the front surface of the sieve plate and the bottom are fixedly installed with rake teeth, the surface of the sieve plate is provided with grille holes, and the number of the No. 1 ear plate, No. 2 ear plate, grille holes and rake teeth is several.

[0010] Preferably, there are several perforated sieve plates, and latches are inserted into the first and second ear plates of several of the perforated sieve plates. The several perforated sieve plates are connected to each other through the latches, and the perforated sieve plates are rectangular.

[0011] Preferably, the No. 1 ear plate at the upper end and the No. 2 ear plate at the lower end of the perforated screen plate are alternately distributed, the aperture size of several of the grille holes is between 3-20 mm, and the hole spacing is between 9-50 mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the utility model, a frame, a perforated screen plate, a driving motor, a brush motor, a brush, a driving sprocket shaft and a sprocket are arranged in a manner that cooperates with each other, so that the sprocket, the chain and the driving sprocket shaft move under the prompting of the driving motor, and the chain moves to drive a plurality of perforated screen plates combined together to circulate. When the perforated screen plate moves, the circulating cooling water passes through the grille holes, while impurities such as seaweed, jellyfish, fish and plastic bottles are intercepted by the perforated screen plate, hooked by the rake teeth on the perforated screen plate and move upward with the perforated screen plate. When the rake teeth of the perforated screen plate move to the rear of the frame, impurities such as seaweed, jellyfish, fish and plastic bottles on the rake teeth fall off due to gravity. While the perforated screen plate moves, the brush motor drives the brush to rotate, so that relative movement is generated between the brush and the rake teeth, thereby further cleaning the debris on the surface of the perforated screen plate and the rake teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a multi-stage grid structure for a circulating cooling water intake of a nuclear power plant according to the present invention;

[0015] Figure 2 This is a partial cross-sectional view of a multi-stage grid structure for a circulating cooling water intake of a nuclear power plant according to the present invention;

[0016] Figure 3 This is a front view of a perforated sieve plate with a multi-stage grid structure for a circulating cooling water intake of a nuclear power plant according to the present invention;

[0017] Figure 4 The utility model is a side view of a perforated sieve plate of a multi-stage grid structure for a circulating cooling water intake of a nuclear power plant.

[0018] In the figure: 1. Frame; 2. Perforated sieve plate; 201. Ear plate No. 1; 202. Ear plate No. 2; 203. Rake teeth; 204. Grille holes; 205. Sieve plate; 3. Drive motor; 4. Brush motor; 401. Brush; 5. Drive sprocket shaft; 6. Sprocket. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-4 The multi-stage grid structure of a circulating cooling water intake of a nuclear power plant is shown, comprising a frame 1 and a perforated sieve plate 2. A drive motor 3 is fixedly mounted on the upper end of the frame 1, and a drive sprocket shaft 5 is movably mounted inside the upper and lower ends of the frame 1. One end of the drive sprocket shaft 5 at the upper end of the frame 1 extends outside the frame 1, and a sprocket 6 is fixedly sleeved on the surface of the drive sprocket shaft 5 inside the frame 1 and near both ends. A transmission chain is sleeved between the sprockets at the upper and lower ends of the frame 1, and the perforated sieve plate 2 is fixedly mounted on the transmission chain. A brush motor 4 is provided at the rear of the upper end of the frame 1.

[0021] The output end of the driving motor 3 and the surface of the external driving sprocket shaft 5 of the frame 1 are also fixedly sleeved with a sprocket 6, and a transmission chain is also sleeved on the sprocket 6 of the driving motor 3 and the sprocket 6 of the external driving sprocket shaft 5 of the frame 1; the output end of the brush motor 4 is fixedly installed with a brush 401, the brush 401 is in contact with the perforated sieve plate 2, and the brush 401 can clean the debris on the surface of the perforated sieve plate 2 and the rake teeth 205; the perforated sieve plate 2 includes a sieve plate 205, an ear plate 201 No. 1, an ear plate 202 No. 2 and rake teeth 203, the upper end of the sieve plate 205 is bent with an ear plate 201 No. 1, the lower end of the sieve plate 205 is bent with an ear plate 202 No. 2, the front surface of the sieve plate 205 and located below is fixedly installed with rake teeth 203, and the surface of the sieve plate 205 is opened There are grille holes 204, and the number of ear plates 201, 202, grille holes 204 and rake teeth 203 is several. When the rake teeth 203 move upward, they can hook foreign matter. When the rake teeth 205 move to the rear of the frame 1, the impurities on the rake teeth 205 fall off due to gravity. There are several perforated sieve plates 2, and pins are inserted into the ear plates 201 and 202 of several perforated sieve plates 2. Several perforated sieve plates 2 are connected to each other by pins, and the perforated sieve plates 2 are rectangular. The ear plate 201 at the upper end and the ear plate 202 at the lower end of the perforated sieve plate 2 are alternately distributed. The aperture size of the several grille holes 204 is between 3-20 mm, and the hole spacing is between 9-50 mm.

[0022] It should be noted that the utility model is a multi-stage grid structure for a circulating cooling water intake of a nuclear power plant. When in use, the sprocket 6, the chain and the drive sprocket shaft 5 move under the impetus of the drive motor 3. When the chain moves, it drives a plurality of perforated sieve plates 2 combined together to circulate. When the perforated sieve plate 2 moves, the circulating cooling water passes through the grid holes 204, while impurities such as seaweed, jellyfish, fish and plastic bottles are intercepted by the perforated sieve plate 2, hooked by the rake teeth 205 on the perforated sieve plate 2 and move upward with the perforated sieve plate 2. When the rake teeth 205 of the perforated sieve plate 2 move to the rear of the frame 1, the impurities such as seaweed, jellyfish, fish and plastic bottles on the rake teeth 205 fall off due to gravity. While the perforated sieve plate 2 moves, the brush motor 4 drives the brush 401 to rotate, so that relative movement is generated between the brush 401 and the rake teeth 205, thereby further cleaning the debris on the surface of the perforated sieve plate 2 and the rake teeth 205.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage grid structure for a circulating cooling water intake of a nuclear power plant, characterized by: The invention comprises a frame (1) and a perforated screen plate (2), wherein a driving motor (3) is fixedly mounted on the upper end of the frame (1), a driving sprocket shaft (5) is movably mounted inside the upper and lower ends of the frame (1), one end of the driving sprocket shaft (5) at the upper end of the frame (1) extends outside the frame (1), a sprocket (6) is fixedly sleeved on the surface of the driving sprocket shaft (5) inside the frame (1) and close to both ends, a transmission chain is sleeved between the sprockets at the upper and lower ends of the frame (1), a perforated screen plate (2) is fixedly mounted on the transmission chain, and a brush motor (4) is provided at the rear of the upper end of the frame (1).

2. The multi-stage grid structure for a circulating cooling water intake of a nuclear power plant according to claim 1, characterized in that: The output end of the driving motor (3) and the surface of the external driving sprocket shaft (5) of the frame (1) are also fixedly sleeved with a sprocket (6), and the sprocket (6) of the driving motor (3) and the sprocket (6) of the external driving sprocket shaft (5) of the frame (1) are also sleeved with a transmission chain.

3. The multi-stage grid structure for circulating cooling water intake of a nuclear power plant according to claim 2, characterized in that: A brush (401) is fixedly mounted on the output end of the brush motor (4), and the brush (401) is in contact with the perforated screen plate (2).

4. The multi-stage grid structure for circulating cooling water intake of a nuclear power plant according to claim 3, characterized in that: The perforated sieve plate (2) comprises a sieve plate (205), a first ear plate (201), a second ear plate (202) and rake teeth (203); the upper end of the sieve plate (205) is bent with the first ear plate (201); the lower end of the sieve plate (205) is bent with the second ear plate (202); the front surface of the sieve plate (205) and the lower portion thereof are fixedly mounted with rake teeth (203); the surface of the sieve plate (205) is provided with grille holes (204); and the number of the first ear plate (201), the second ear plate (202), the grille holes (204) and the rake teeth (203) is several.

5. The multi-stage grid structure for circulating cooling water intake of a nuclear power plant according to claim 4, characterized in that: There are a plurality of perforated sieve plates (2), and latches are inserted into the first ear plate (201) and the second ear plate (202) of the plurality of perforated sieve plates (2). The plurality of perforated sieve plates (2) are connected to each other via the latches, and the perforated sieve plates (2) are rectangular.

6. The multi-stage grid structure for a circulating cooling water intake of a nuclear power plant according to claim 5, characterized in that: The first ear plate (201) at the upper end and the second ear plate (202) at the lower end of the perforated screen plate (2) are alternately distributed, and the aperture size of the plurality of grille holes (204) is between 3-20 mm, and the hole spacing is between 9-50 mm.

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