CN2871045Y - Cooler for hot rolling production line of strip steel - Google Patents

Abstract

A cooler for hot rolling production line of strip steel, which pertains to the art of hot rolled strip rapid cooling device. The utility model comprises a water distributing pipe, a turbulent flow chamber, and a plurality of jet flow nozzles, one end of the water distributing pipe is equipped with a blocking plate of water pipe, the lower part of the water distributing pipe is the turbulent flow chamber which is a box-shaped body, the sideboard and the blocking plate of the turbulent flow chamber are connected with the water distributing pipe, a plurality of screwed holes are arranged on the bottom plate of the turbulent flow chamber, the jet flow nozzles are arranged in the holes and extend into the turbulent flow chamber through the bottom plate, a plurality of water distributing holes are arranged on the water distributing pipe which is communicated with the inside of the turbulent flow chamber via the water distributing holes; high-pressure water passes through the water distributing holes and the turbulent flow chamber, keeping the high pressure state, and then evenly spurts out from each jet flow nozzle. The utility model has the advantages of that the cooling velocity has a substantial rise, the flow and the pressure of the high pressure water stream spurted out from each jet flow nozzle is uniform.

Description

A cooling device for hot-rolled strip steel production line

technical field

The utility model belongs to the technical field of hot-rolled steel strip cooling, in particular to a cooling device used in a hot-rolled steel strip production line.

technical background

In order to produce a type of hot-rolled strip, the strip needs to be rapidly cooled from 600°C to 700°C to below 200°C at a cooling rate of 200°C/s to 400°C/s. The current hot-rolled strip production line, including conventional process and short process, generally adopts laminar flow cooling device, and the maximum cooling rate is lower than 150°C/s, which cannot meet the technological requirements for producing such hot-rolled strip.

Utility model content

In order to meet the technological requirements for producing a type of hot-rolled strip steel and overcome the lack of cooling speed of the existing laminar flow cooling device, the utility model provides a cooling device for a hot-rolled strip steel production line. Within the temperature range of 20°C, a cooling rate of 200°C/s~400°C/s can be achieved, which can meet the technological requirements for the production of the above steel types.

The technical scheme adopted by the utility model to solve its technical problems is: the device includes a water distribution pipe, a turbulent flow chamber, and a jet nozzle. The box body, the turbulent flow chamber side plate, and the turbulent flow chamber blocking plate are all connected to the water distribution pipe. There are several threaded holes on the turbulent flow chamber bottom plate. The spacing between the holes on the turbulent flow chamber bottom plate is 10mm~ 20mm, a jet nozzle is installed in the hole, the jet nozzle extends into the turbulence chamber through the bottom plate of the turbulence chamber, the center of the jet nozzle is a long round hole, the inner diameter is 3mm~6mm, the length is 40mm~70mm, the head of the jet nozzle Placed outside the bottom plate of the turbulent flow chamber, the outer diameter of the jet nozzle in contact with the bottom plate of the turbulent flow chamber is threaded; there are several water diversion holes on the bottom plate of the water distribution pipe, and the water distribution pipe communicates with the inside of the turbulent flow chamber through the water distribution holes ; The turbulence chamber is a box body composed of two turbulent flow chamber blocking plates, two turbulent flow chamber side plates and a turbulent flow chamber bottom plate welded. It is welded and connected with the water distribution pipe, and all welds are sealed and welded.

The working process of the utility model: the water is pressurized into high-pressure water by the pressurizing pump, and after entering the turbulent flow chamber through the water-distributing hole on the water-distributing pipe, the water maintains a high-pressure state and is evenly sprayed out through each jet nozzle.

The beneficial effects of the utility model are: within the temperature range of 1000°C-20°C, the strip steel can be cooled at a temperature drop of 200°C/s-400°C/s; Direct contact with water forms a heat exchange method of forced convection. Compared with laminar flow cooling, the cooling speed is greatly improved; water distribution pipes and turbulent flow chambers are used to divide the flow, so that the flow rate and working pressure of high-pressure water sprayed by each jet nozzle are the same.

Description of drawings

Fig. 1 is the overall structural representation of the utility model,

Fig. 2 is a partial cross-sectional side view of Fig. 1,

Fig. 3 is a partial sectional view of the water distribution pipe in Fig. 1,

Fig. 4 is a schematic diagram of the structure of the jet nozzle in the utility model,

Fig. 5 is the left view of Fig. 4;

In the figure 1. jet nozzle, 2. turbulent flow chamber blocking plate, 3. water diversion pipe, 4. water diversion pipe blocking plate, 5. turbulent flow chamber side plate, 6. turbulent flow chamber bottom plate, 7. water diversion hole, 8. Turbulence chamber, 9 water inlets.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Embodiment 1: As shown in Figures 1 to 5, the structure of the utility model includes a water distribution pipe 3, a turbulent flow chamber 8, and a jet nozzle 1. One end of the water distribution pipe 3 is provided with a water distribution pipe blocking plate 4, which is connected by welding, and the water distribution pipe Below 3 is the turbulent flow chamber 8, which is composed of two turbulent flow chamber blocking plates 2, two turbulent flow chamber side plates 5 and a turbulent flow chamber bottom plate 6 welded together, the turbulent flow chamber side plate 5, the turbulent flow chamber The cavity blocking plate 2 and the water distribution pipe 3 are all welded and connected. There are 122 holes with threads on the bottom plate 6 of the turbulent flow cavity. The inner diameter is 3 mm, and the length is 40 mm. The jet nozzle 1 extends into the turbulent flow chamber 8 through the bottom plate 6 of the turbulent flow chamber. The water distribution pipe 3 is provided with 61 water distribution holes 7. The water distribution pipe 3 passes through the water distribution holes 7 and turbulent The inside of the flow chamber 8 is connected; after the high-pressure water passes through the water distribution pipe 3 and the turbulent flow chamber 8, it maintains a high-pressure state and sprays out from each jet nozzle 1 evenly.

Its working process: the water is pressurized into high-pressure water by the booster pump, the flow rate of the high-pressure water is 850M ³ /h, and the pressure is 0.2MPa. After entering the turbulent flow chamber 8 through the water distribution hole 7 on the water distribution pipe 3, the water is turbulent. Maintain a high-pressure state, spray evenly through each jet nozzle 1, and the high-pressure water flow rate sprayed by each jet nozzle, the working pressure is 0.2MPa, so that the strip steel can achieve a cooling rate of 200 ° C / s temperature drop.

Embodiment 2: As shown in Figures 1 to 5, the structure of the utility model includes a water distribution pipe 3, a turbulent flow chamber 8, and a jet nozzle 1. One end of the water distribution pipe 3 is provided with a water distribution pipe blocking plate 4, which is connected by welding, and the water distribution pipe Below 3 is the turbulent flow chamber 8, which is composed of two turbulent flow chamber blocking plates 2, two turbulent flow chamber side plates 5 and a turbulent flow chamber bottom plate 6 welded together, the turbulent flow chamber side plate 5, the turbulent flow chamber The cavity blocking plate 2 and the water distribution pipe 3 are all welded and connected. There are 60 threaded holes on the bottom plate 6 of the turbulent flow cavity. The interval of the holes is 20mm. The jet nozzle 1 is installed in the hole. The inner hole diameter is 6 mm, and the length is 70 mm. The jet nozzle 1 extends into the turbulent flow chamber 8 through the bottom plate 6 of the turbulent flow chamber. There are 20 water distribution holes 7 on the water distribution pipe 3. The water distribution pipe 3 passes through the water distribution holes 7 and turbulent The inside of the flow chamber 8 is connected; after the high-pressure water passes through the water distribution pipe 3 and the turbulent flow chamber 8, it maintains a high-pressure state and sprays out from each jet nozzle 1 evenly.

Its working process: the water is pressurized into high-pressure water by the booster pump, the flow rate of the high-pressure water is 1200M ³ /h, and the pressure is 0.35MPa. After entering the turbulent flow in the turbulent flow chamber 8 through the water distribution hole 7 on the water distribution pipe 3, Maintain a high-pressure state, spray uniformly through each jet nozzle 1, and the high-pressure water flow rate ejected from each jet nozzle, the working pressure is 0.35MPa, so that the strip steel can achieve a temperature drop of 400°C/s.

Embodiment 3: As shown in Figures 1 to 5, the structure of the utility model includes a water distribution pipe 3, a turbulent flow chamber 8, and a jet nozzle 1. One end of the water distribution pipe 3 is provided with a water distribution pipe blocking plate 4, which is connected by welding, and the water distribution pipe Below 3 is the turbulent flow chamber 8, which is composed of two turbulent flow chamber blocking plates 2, two turbulent flow chamber side plates 5 and a turbulent flow chamber bottom plate 6 welded together, the turbulent flow chamber side plate 5, the turbulent flow chamber The chamber blocking plate 2 and the water distribution pipe 3 are all welded and connected. There are 104 threaded holes on the bottom plate 6 of the turbulent flow chamber. The interval of the holes is 15mm. The jet nozzle 1 is installed in the hole. The inner diameter is 5mm, and the length is 50mm. The jet nozzle 1 extends into the turbulent flow chamber 8 through the bottom plate 6 of the turbulent flow chamber, and 52 water distribution holes 7 are arranged on the water distribution pipe 3. The water distribution pipe 3 passes through the water distribution holes 7 and turbulent The inside of the flow chamber 8 is connected; after the high-pressure water passes through the water distribution pipe 3 and the turbulent flow chamber 8, it maintains a high-pressure state and sprays out from each jet nozzle 1 evenly.

Its working process: the water is pressurized into high-pressure water by the booster pump, the flow rate of the high-pressure water is 1000M ³ /h, and the pressure is 0.3MPa. After entering the turbulent flow chamber 8 through the water distribution hole 7 on the water distribution pipe 3, the water is turbulent. Maintain a high-pressure state, spray uniformly through each jet nozzle 1, and the high-pressure water flow rate sprayed by each jet nozzle, the working pressure is 0.3MPa, so that the strip steel can achieve a cooling rate of 300 ° C / s temperature drop.

Claims (3)

1, a kind of cooling device that is used for hot-rolled strip production line, it is characterized in that comprising distributive pipe, turbulent chamber, jet nozzle, one end of distributive pipe is provided with the distributive pipe closure plate, the distributive pipe below is turbulent chamber, the turbulent flow chamber is a casing, turbulent flow chamber side plate, turbulent chamber closure plate are connected with distributive pipe respectively, on the base plate of turbulent chamber, have several screwed holes, jet nozzle is installed in the hole, jet nozzle stretches in the turbulent chamber by turbulent chamber base plate, be provided with several tapping holes on distributive pipe, distributive pipe communicates with inside, turbulent chamber by tapping hole.

2, a kind of cooling device that is used for hot-rolled strip production line according to claim 1, it is characterized in that the structure of described jet nozzle: its center is elongated circular hole, and the aperture is 3mm～6mm, and length is 40mm～70mm.

3, a kind of cooling device that is used for hot-rolled strip production line according to claim 1, the spacing that it is characterized in that described institute's perforate on the base plate of turbulent chamber is 10mm～20mm.

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