Steel strip water-cooling spraying system

Abstract

The utility model discloses a steel strip water-cooling spraying system which comprises a spraying groove, a material passing channel is arranged on the spraying groove, a spraying mechanism is arranged in the material passing channel, the spraying mechanism is connected with a water tank through a pipeline, the bottom of the spraying groove is communicated with the water tank through a pipeline, and a cooling tower is arranged on the water tank in a communicated mode. And a water return pipeline is communicated between the cooling tower and the water tank. Water at the bottom of the spraying groove is pumped into the water tank through the pipeline to be cooled for the first time, water in the water tank is pumped into the spraying mechanism to conduct spraying cooling on the steel belt, and water in the water tank can also be pumped into the cooling tower through the water return pipeline to be cooled for the second time. Compared with the prior art, the recycled water is firstly fed into the water tank to be cooled, the cooling tower is started only when the water in the water tank is overheated, the energy consumption burden is reduced, after the water is directly pumped into the water tank, the water in the water tank can quickly reduce the temperature, and the cooling time of the water is shortened.

Description

Technical Field

[0001] This utility model relates to the field of steel strip production technology, and in particular, to a water-cooled spray system for steel strip. Background Technology

[0002] In the steel production process, the steel strip raw material must be cleaned before use; otherwise, the contaminants adhering to the steel strip will seriously affect the quality of the steel. Currently, steel strip cleaning is mainly achieved through high-pressure water jet rinsing and roller brush scrubbing. The steel strip typically passes through at least one degreasing tank and at least two water rinsing tanks during the cleaning process to ensure the cleanliness of the steel strip surface. Before the degreasing and cleaning process, the steel strip surface needs to be coated with paint and baked for curing. Since the temperature of the baked and cured steel strip is very high, a cooling system needs to be designed to cool the steel strip surface.

[0003] Existing technologies also include spray systems for cooling steel strips. These systems typically consist of a spraying mechanism and a recovery device at the bottom of the mechanism. The recovery device directly sends the recovered water into a cooling tower, where it is cooled and then discharged into a storage tank. A pump then pumps the water from the storage tank into the spraying mechanism for spraying. However, directly sending the recovered water into the cooling tower increases the energy consumption of the cooling tower and also results in a longer cooling time. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a steel strip water-cooled spray system.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A water-cooled spray system for steel strip includes a spray tank with a material passage. A spray mechanism is installed in the material passage, and the spray mechanism is connected to a water tank via a pipe. The bottom of the spray tank is connected to the water tank via a pipe, and a cooling tower is connected to the water tank. The spray mechanism can spray water from the water tank into the material passage, and water at the bottom of the spray tank is pumped back into the water tank via a pipe. A return water pipe is connected between the cooling tower and the water tank.

[0007] The top of the spray tank is covered with a suction hood, and a water mist fan is connected to the suction hood. An exhaust duct is installed on the air outlet of the water mist fan.

[0008] The spraying mechanism includes two spray pipes positioned vertically opposite each other, and each spray pipe is equipped with a plurality of nozzles, with the nozzles on the two spray pipes having water outlet directions facing each other.

[0009] The spray tank is funnel-shaped, wider at the top and narrower at the bottom.

[0010] The bottom of the spray tank is provided with a drain outlet.

[0011] The two spray pipes are staggered along the feeding direction of the steel strip.

[0012] The water tank is equipped with a partition that divides the inner cavity of the water tank into a mixing zone and a storage zone. The bottom of the spray tank is connected to the mixing zone via a pipe. The spray mechanism is connected to the mixing zone and the storage zone via two branch pipes respectively. The mixing zone is connected to the cooling tower via a return water pipe.

[0013] The water storage area and the cooling tower are also connected by the return water pipeline.

[0014] The partition is slidably disposed and has a flow port. A pressure-type check valve is disposed in the flow port. The pressure-type check valve is adapted to allow water in the water storage area to flow into the mixing area. The cross-sectional area of ​​the mixing area is smaller than that of the water storage area. The partition is provided with a sliding part adapted to the mixing area.

[0015] The beneficial effects of this invention are as follows: Water at the bottom of the spray tank is drawn into a water tank through pipes for initial cooling. Water in the water tank is then drawn into the spray mechanism to cool the steel strip. Water in the water tank can also be drawn into the cooling tower through a return pipe for a second cooling process. Compared with existing technologies, in this invention, the recovered water is first sent to a water tank for cooling, and the cooling tower only starts when the water in the tank becomes overheated, reducing energy consumption. Furthermore, the direct drawing of water into the tank allows for rapid temperature reduction, shortening the cooling time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0017] Figure 2 This is a schematic diagram of the spraying mechanism;

[0018] Figure 3 This is a schematic diagram of the partition structure.

[0019] Reference numerals: 1. Spray tank; 2. Material passage; 3. Spraying mechanism; 4. Water tank; 5. Cooling tower; 6. Return water pipe; 7. Exhaust hood; 8. Water mist fan; 9. Exhaust gas duct; 10. Spray pipe; 11. Nozzle; 12. Drain outlet; 13. Baffle; 14. Mixing zone; 15. Water storage zone; 16. Flow outlet; 17. Pressure check valve; 18. Sliding part; 19. Casing. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 1 , Figure 2 As shown, a steel strip water-cooling spray system includes a spray tank 1. For example, the spray tank 1 can be formed by a housing 19 as its outer frame, and a through material passage 2 is constructed on it. The steel strip to be cooled can pass through the spray tank 1 through the material passage 2. For example, several conveying rollers can be arranged side by side in the material passage 2, or other conveying mechanisms capable of conveying the steel strip can be installed. A spraying mechanism 3 is also installed in the material passage 2. The spraying mechanism 3 can be any device in the prior art that uses water spray to cool the steel strip. In this way, after the steel strip passes through the spray tank 1, the sprayed water can cool the steel strip.

[0022] In some embodiments, the spraying mechanism 3 is connected to the water tank 4 via a pipe, and the bottom of the spraying tank 1 is also connected to the water tank 4 via a pipe. It can be understood that a circulation path is formed between the water tank 4, the spraying mechanism 3, and the spraying tank 1. The water recovered in the spraying tank 1 can be drawn into the water tank 4, and the water in the water tank 4 can perform the first cooling on the recovered water.

[0023] In addition, a cooling tower 5 is connected to the water tank 4. The cooling tower 5 is existing technology, and its specific structure and principle will not be described in detail in this utility model. A return water pipe 6 is connected between the cooling tower 5 and the water tank 4. For example, when the water in the water tank 4 gradually heats up and exceeds the threshold, the cooling tower 5 draws the water from the water tank 4 back in for a second cooling. The cooled water is then poured back into the water tank 4 through the outlet for spray cooling of the steel belt.

[0024] In some examples, the casing 19 of the spray tank 1 can be constructed in a funnel shape, wider at the top and narrower at the bottom, which facilitates the collection of water into the bottom of the tank for recycling. For example, a drain outlet 12 can be provided at the bottom of the spray tank 1, and a pipe can be connected between the drain outlet 12 and the water tank 4 to allow the recycled water to be drawn into the water tank 4 for cooling.

[0025] The spraying mechanism 3 preferably includes two spray pipes 10 positioned vertically opposite each other. For example, the lower spray pipe 10 can be positioned between two adjacent transfer rollers to avoid interference with the steel strip. Specifically, the spray pipe 10 is provided with a plurality of nozzles 11, and the water outlet directions of the nozzles 11 on the two spray pipes 10 are arranged facing each other. The term "arranged facing each other" means that the nozzles 11 all spray water towards one side of the steel strip, thereby achieving multi-faceted spray cooling of the steel strip.

[0026] In a preferred embodiment, the two spray pipes 10 are staggered along the feed direction of the steel strip, so that different parts of the steel strip can be cooled.

[0027] In some embodiments, the top of the spray tank 1 is also covered with a suction hood 7, and a water mist fan 8 is connected to the suction hood 7. The air outlet of the water mist fan 8 is connected to an exhaust gas duct 9. The exhaust gas generated in the spray tank 1 can be extracted by the water mist fan 8 and centrally treated through the exhaust gas duct 9, which makes the present invention more environmentally friendly and reliable.

[0028] like Figure 1 , Figure 3 As shown, in some embodiments, a partition 13 is provided inside the water tank 4, dividing the inner cavity of the water tank 4 into a mixing zone 14 and a storage zone 15. Furthermore, the bottom of the spray tank 1 is connected to the mixing zone 14 via a pipe, and the spray mechanism 3 is connected to the mixing zone 14 and the storage zone 15 via two branch pipes respectively. The return water pipe 6 is connected between the mixing zone 14 and the cooling tower 5. The use of a three-way valve to open and close a single flow path on the two branch pipes is existing technology and will not be described in detail.

[0029] Therefore, the water recovered in the spray tank 1 will be pumped into the mixing zone 14 through the pipeline for the first cooling. When the water temperature in the mixing zone 14 gradually rises and exceeds the threshold, the spray mechanism 3 will pump water from the storage zone 15 to spray the steel strip, thus ensuring the cooling effect on the steel strip. At this time, the cooling tower 5 will pump water from the mixing zone 14 for the second cooling. When the water temperature in the mixing zone 14 drops again, the spray mechanism 3 will pump water from the mixing zone 14 to spray the steel strip again. During this period, the cooling tower 5 can pump the water in the mixing zone 14 back into the storage zone 15 after cooling, so that it can be used when the water temperature in the mixing zone 14 becomes too high again.

[0030] It is understandable that the water filled into the water storage area 15 of the cooling tower 5 does not need to be cooled to a low temperature. Instead, the water is filled into the water storage area 15 for natural heat dissipation, which can reduce the energy consumption burden of the cooling tower 5.

[0031] For example, a return water pipe 6 is also connected between the water storage area 15 and the cooling tower 5. When the water temperature in the water storage area 15 is not suitable for spray cooling, the water in the water storage area 15 can be quickly cooled by the cooling tower 5 to ensure the cooling effect on the steel strip.

[0032] In a preferred embodiment, the partition 13 is adapted to be slidable, and a flow port 16 is provided on the partition 13. A pressure-type check valve 17 is provided in the flow port 16 to allow water in the water storage area 15 to flow into the mixing area 14. In addition, the cross-sectional area of ​​the water area is adapted to be smaller than the cross-sectional area of ​​the water storage area 15, and a sliding part 18 adapted to the mixing area 14 is provided on the partition 13.

[0033] When the spraying mechanism 3 draws water from the water storage area 15, the recovered water is drawn into the mixing area 14. Since the cross-section of the mixing area 14 is smaller than that of the water storage area 15, the baffle 13 can be pushed to slide further towards the side of the water storage area 15. The water in the water storage area 15 can flow into the mixing area 14 through the flow port 16, which can help cool the water in the mixing area 14 and reduce the energy consumption burden of the cooling tower 5.

[0034] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A steel strip water cooling spray system characterized by: The utility model provides a kind of cooling device of steel belt, including spray tank (1), the spray tank (1) is provided with overfeed passageway (2), the spray mechanism (3) is provided in the overfeed passageway (2), the spray mechanism (3) is connected with water tank (4) by pipeline, the bottom of the spray tank (1) is connected with the water tank (4) by pipeline, the water tank (4) is connected with cooling tower (5), the spray mechanism (3) can spray the moisture in the water tank (4) into the overfeed passageway (2), the moisture in the bottom of the spray tank (1) is re-pumped into the water tank (4) by pipeline, the cooling tower (5) is connected with the water tank (4) and is provided with backwater pipeline (6).

2. The steel strip water cooling spray system of claim 1, wherein: The top of the spray tank (1) is covered with a suction hood (7), and the suction hood (7) is provided with a water mist fan (8) in communication.

3. The steel strip water cooling spray system of claim 1, wherein: The spray mechanism (3) includes two spray pipes (10) arranged oppositely, and a plurality of nozzles (11) are arranged on the spray pipes (10).

4. The steel strip water cooling spray system of claim 1, wherein: The spray tank (1) is funnel-shaped with a large upper part and a small lower part.

5. The steel strip water cooling spray system of claim 1 or 4, characterized by: The bottom of the spray tank (1) is provided with a drain (12).

6. The steel strip water cooling spray system of claim 3, wherein: The two spray pipes (10) are arranged in a staggered manner along the feeding direction of the steel belt.

7. The steel strip water cooling spray system of claim 1, wherein: The water tank (4) is provided with a partition (13), which divides the inner cavity of the water tank (4) into a water mixing area (14) and a water storage area (15).

8. The steel strip water cooling spray system of claim 7, characterized by: The water storage area (15) is also connected with the cooling tower (5) through the backwater pipeline (6).

9. The steel strip water cooling spray system of claim 7 or 8, characterized by: The partition (13) is slidably arranged, and a flow passage (16) is formed in the partition (13) and provided with a pressure one-way valve (17).

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