Device for preventing cooling water of fog cooling tank from flowing out

Abstract

The utility model discloses a device for preventing cooling water of a fog cooling tank from flowing out, which comprises a rack, a first breather pipe and the fog cooling tank, the first breather pipe and the fog cooling tank are both mounted on the rack, the fog cooling tank is provided with a feed port and a discharge port, and a steel plate enters the fog cooling tank from the feed port and is output from the discharge port. The first ventilation pipe is close to the feeding port and located above the steel belt, the first ventilation pipe is horizontally arranged, a plurality of air blowing ports with obliquely-downward openings are formed in the first ventilation pipe at intervals, and the air blowing ports are used for blowing air into the fog cooling groove. An air curtain formed by the plurality of air blowing ports can blow water above the steel strip into the fog cooling tank and finally fall into the fog cooling tank, so that the cooling water can be prevented from being sprayed onto a steel plate without a coating and being gasified to form water drops which roll into a steel strip baking furnace, and the effect of preventing the cooling water in the fog cooling tank from flowing out is achieved; and the problems of equipment oxidation corrosion and the like caused by the cooling water flowing into the furnace area can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of continuous color coating production equipment, and particularly relates to a device for preventing cooling water from flowing out of a mist cooling tank. Background Art

[0002] At present, on the continuous color coating production line, when the spray-type mist cooling trough sprays cooling water, if the steel strip to be cooled is not coated, the water will quickly vaporize at the point of contact with the high-temperature metal plate. The resulting air pressure shock causes the water droplets to float in the air, and the surface tension will make the cooling water spherical, causing the water balls to roll along the steel strip into the baking furnace, causing the temperature in the baking furnace to drop and the furnace equipment to rust, resulting in an increase in the consumption of natural gas used to heat the baking furnace and accelerated oxidation and corrosion of the baking furnace equipment.

[0003] Therefore, a new technology is needed to solve the problem of easy outflow of cooling water in the mist cooling tank in the prior art. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a device for preventing the outflow of cooling water from the mist cooling tank, which has the effect of preventing the outflow of cooling water from the mist cooling tank.

[0005] The utility model adopts the following technical solutions:

[0006] A device for preventing cooling water from flowing out of a mist cooling trough comprises a frame, a first vent pipe and a mist cooling trough, wherein the first vent pipe and the mist cooling trough are both installed on the frame, the mist cooling trough is provided with a feed port and a discharge port, steel plates enter the mist cooling trough from the feed port and are discharged from the discharge port, the first vent pipe is close to the feed port and is located above the steel strip, the first vent pipe is arranged horizontally, and a plurality of blowing ports with openings obliquely downward are provided at intervals on the first vent pipe, and each blowing port is used for blowing air into the mist cooling trough.

[0007] As a further improvement of the technical solution of the utility model, it also includes an air supply system, which is connected to the first ventilation pipe and is used to supply air into the first ventilation pipe;

[0008] One end of the first ventilation pipe is closed, and the other end is connected to the air supply system.

[0009] As a further improvement of the technical solution of the present invention, it also includes a first valve body, which is located between the multiple air blowing ports and the air supply system, and is used to control the gas entering the multiple air blowing ports.

[0010] As a further improvement of the technical solution of the present invention, a counter is also included, which can record the running meters of the steel strip.

[0011] As a further improvement of the technical solution of the utility model, it also includes an air nozzle corresponding to each of the blowing ports, each of the air nozzles is installed on the ventilation pipe and connected to the ventilation pipe, and each of the air nozzles is used to blow air toward the surface of the steel strip.

[0012] As a further improvement of the technical solution of the present utility model, two vertical columns are provided on the frame, the two columns are respectively arranged on both sides of the feed port, and the two ends of the first ventilation pipe are respectively connected to the two columns.

[0013] As a further improvement of the technical solution of the present invention, it also includes a second ventilation pipe, the two ends of which are respectively connected to the first ventilation pipe and the air supply system, the first valve body is installed on the second ventilation pipe, and the second ventilation pipe is connected to one of the columns.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] After being coated by the coating machine, the steel strip is conveyed into the steel strip baking furnace. After passing through the steel strip baking furnace, the steel strip is conveyed to the mist cooling trough for cooling. When the coating machine's coating rollers are closed, the paint on the steel strip surface creates a coating structure, resulting in poor thermal conductivity. As this portion of the steel strip passes through the mist cooling trough, the cooling water sprayed on this portion of the steel strip does not instantly vaporize to form gas, preventing water droplets from rolling into the steel strip baking furnace. When the coating machine's coating rollers are open, the steel strip surface is free of paint and has good thermal conductivity. As this portion of the steel strip passes through the mist cooling trough, the cooling water rapidly vaporizes at contact with the hot metal plate. The resulting pressure shock causes the water droplets to float, while surface tension causes the cooling water droplets to form spherical shapes. This can cause the water droplets to roll along the steel strip into the baking furnace, lowering the furnace temperature and rusting the furnace equipment. This increases the consumption of natural gas used to heat the furnace and accelerates oxidation and corrosion of the equipment. When the air outlets in this solution blow air into the mist cooling trough, compressed air is introduced into the first vent pipe and sweeps it into the trough, forming an air curtain to prevent water droplets from rolling into the steel strip baking furnace. The air curtain formed by the air outlets can sweep water from the steel strip into the mist cooling trough, where it eventually falls. This prevents cooling water from being sprayed onto uncoated steel plates and vaporizing to form water balls that roll into the steel strip baking furnace. This solution's device for preventing cooling water from flowing out of the mist cooling trough can effectively solve problems such as equipment oxidation corrosion caused by cooling water flowing into the furnace area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technology of the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 It is a schematic diagram of the use scenario of the utility model;

[0018] Figure 2It is a schematic diagram of the overall structure of the mist cooling trough.

[0019] Reference numerals:

[0020] 1-frame; 11-mist cooling trough; 111-water pipe; 12-first ventilation pipe; 121-air nozzle; 122-first valve body; 13-feed port; 14-discharge port;

[0021] 2- coating machine; 21- coating roller; 22- second valve body:

[0022] 3- baking furnace;

[0023] 4-Steel belt. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0025] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. In addition, the terms "upper," "lower," "left," and "right" used in this utility model are only used with respect to the relative positions of the components of the utility model in the accompanying drawings.

[0026] Reference Figures 1 to 2 , a device for preventing cooling water from flowing out of a mist cooling trough, comprising a frame 1, a first ventilation pipe 12 and a mist cooling trough 11, wherein the first ventilation pipe 12 and the mist cooling trough 11 are both installed on the frame 1, and the mist cooling trough 11 is provided with a feed port 13 and a discharge port 14, and the steel plate or steel strip enters the mist cooling trough 11 from the feed port 13 and is output from the discharge port 14, the first ventilation pipe 12 is close to the discharge port 14 and is located above the steel plate, the first ventilation pipe 12 is arranged horizontally, and a plurality of blowing ports with openings obliquely downward are provided on the first ventilation pipe 12 at intervals, and each blowing port is used to blow air into the mist cooling trough 11.

[0027] After being coated by the coating machine 2, the steel strip 4 is conveyed into the baking furnace 3, which is the steel strip baking furnace 3. After passing through the steel strip baking furnace 3, the steel strip 4 is conveyed to the mist cooling tank 11 to cool the steel strip 4. The steel strip 4 is cooled by being sprayed with cooling water in the mist cooling tank 11. When the coating roller 21 of the coating machine 2 is closed for coating, the surface of the steel strip 4 is painted, so that the surface of the steel strip 4 has a coating structure, which causes poor thermal conductivity. When this part of the steel strip 4 passes through the mist cooling tank 11, the cooling water will not instantly vaporize to form gas, so no water balls will roll into the steel strip baking furnace 3. At this time, the first valve body 122 is closed and the air blowing ports stop blowing; when the coating roller 21 of the coating machine 2 on the coating machine 2 is opened, there is no paint on the surface of the steel strip 4, and the surface thermal conductivity of the steel strip 4 is good. When this part of the steel strip 4 passes through the mist cooling tank 11, the cooling water quickly vaporizes at the contact point with the high-temperature metal plate, and the generated air pressure shock causes the water droplets to float in the air, and the surface tension makes the cooling water droplets spherical, causing the water balls to roll along the steel strip 4 into the baking furnace, causing the temperature in the baking furnace to drop and the furnace equipment to rust, thereby increasing the consumption of natural gas used to heat the baking furnace and accelerating the oxidation and corrosion of the equipment. When the first valve body 122 in this solution is opened, each air outlet blows air into the mist cooling tank 11, and compressed air is introduced into the first ventilation pipe 12 to blow into the mist cooling tank 11 and form an air curtain to prevent water droplets from rolling into the steel strip baking furnace 3. The air curtain formed by the air outlet can blow the water on the steel strip 4 into the mist cooling tank 11 and finally drop it into the mist cooling tank 11, which can prevent the cooling water from being sprayed onto the uncoated steel plate and vaporizing to form water balls that roll into the steel strip 4 baking furnace. The device for preventing the outflow of cooling water from the mist cooling tank 11 in this solution has the effect of preventing the outflow of cooling water from the mist cooling tank 11, and can effectively solve the problems of equipment oxidation corrosion caused by the cooling water from the mist cooling tank flowing into the furnace area. Among them, a water pipe 111 for cooling water to pass through is provided on the mist cooling tank 11, and the water supply equipment provides cooling water for spraying to the mist cooling tank 11 through the water pipe 111.

[0028] The device for preventing the outflow of cooling water from the mist cooling tank 11 in this solution also includes an air supply system, which is connected to the first ventilation pipe 12 and is used to supply air into the first ventilation pipe 12; one end of the first ventilation pipe 12 is closed, and the other end is connected to the air supply system.

[0029] The device for preventing the outflow of cooling water from the mist cooling tank 11 of this scheme also includes a first valve body 122. The first valve body 122 is a purge control valve. The first valve body 122 can preferably be a solenoid valve. The first valve body 122 is installed on the first ventilation pipe 12 and is located between the multiple air ports and the air supply system. The first valve body 122 is used to control the gas entering the multiple air ports. The surface of the steel strip 4 needs to be purged when it is not painted, and no purging is required when the surface of the steel strip is painted.

[0030] Whether the steel strip 4 is being painted during the coating process at the coating machine 2, upstream of the mist cooling tank 11, determines whether the purge control valve should be opened. This determination is based on the closing cylinder signal from the coating roller 21 and the simultaneous fulfillment of a production line operation signal. Once these conditions are met, a counter begins to calculate the length. When the set length is reached, the PLC controls the opening of the purge control valve to purge the steel strip. When the coating roller 21 is open, the steel strip 4 is not in contact with the coating roller 21, and no paint is applied. When the coating roller 21 is closed, the steel strip 4 is in contact with the coating roller 21, and paint is applied. The purge control valve must be opened to purge the steel strip when the surface is unpainted. Purge is not required when the surface is painted.

[0031] The device for preventing the cooling water from flowing out of the mist cooling tank 11 in this solution further includes a counter, which can be used to record the number of meters the steel strip 4 has run.

[0032] Specifically, when the coated portion of the steel strip 4 runs to the mist cooling tank 11, the first valve body 122 is controlled to close to control each of the blowing ports to stop blowing; when the uncoated portion of the steel strip 4 runs to the mist cooling tank 11, the first valve body 122 is controlled to open to control each of the blowing ports to blow.

[0033] The running direction or conveying direction of the steel belt 4 can be referred to Figure 1 As shown, that is, Figure 1 The direction indicated by the arrow in FIG. After passing through the coating machine 2, the steel strip 4 is conveyed into the steel strip baking furnace 3. After passing through the steel strip baking furnace 3, the steel strip 4 is conveyed to the mist cooling tank 11 for cooling. The coating machine 2 is equipped with a coating roller 21 and a second valve body that controls the coating roller 21 coating and shutdown. The second valve body is a cylinder or solenoid valve. When the cylinder controls the coating roller 21 to open, no paint coating is carried out, and the counter starts to count the number of meters of the steel strip 4 running. When the counter is turned on and the corresponding initial position on the steel strip 4 runs to the position of the mist cooling groove 11, the solenoid valve is controlled to open, that is, the first valve body 122 is controlled to open to allow the air outlet to blow air, and compressed air is introduced into the first ventilation pipe 12 to blow toward the mist cooling groove 11 and form an air curtain to prevent water droplets from rolling into the steel strip baking furnace 3. The air curtain formed by the blowing port can blow the water on the steel strip 4 into the mist cooling groove 11 and finally fall into the mist cooling groove 11, which can prevent the cooling water from being sprayed onto the uncoated steel plate and vaporizing to form water balls that roll into the steel strip 4 baking furnace.

[0034] Specifically, after the coating roller 21 of the coating machine 2 is opened, a counter begins counting the number of meters of steel strip 4 traveled. When the initial, uncoated position on the steel strip 4 corresponding to the opening of the coating roller 21, as measured by the counter, reaches the mist cooling tank 11, a control signal is output by the PLC controller to energize and open the first valve body 122. Compressed air is introduced into the first vent pipe 12, blowing toward the mist cooling tank 11 and onto the steel strip 4, forming an air curtain to prevent water droplets from rolling into the furnace. The air curtain formed by the several air ports forces the water droplets to fall into the mist cooling tank 11. When the coating roller 21 of the coating machine 2 is closed for painting, the counter begins counting the number of meters of steel strip traveled again. When the initial, coated position on the steel strip 4 corresponding to the closing of the coating roller 21, as measured by the counter, reaches the mist cooling tank 11, a control signal is output by the PLC to close the first valve body 122, and the air ports cease blowing, thus avoiding waste and unnecessary consumption of compressed air. Each opening and closing of the coating roller 21 of the coating machine 2 can be automatically controlled in the same manner as described above.

[0035] The device for preventing the cooling water from flowing out of the mist cooling trough 11 in this solution also includes an air nozzle 121 corresponding to each of the blowing ports. Each of the air nozzles 121 is installed on the ventilation pipe and connected to the ventilation pipe. Each of the air nozzles 121 is used to blow air onto the surface of the steel strip 4.

[0036] The device for preventing the outflow of cooling water from the mist cooling tank 11 in this solution also includes a second ventilation pipe. Two vertical columns are provided on the frame 1, and the two columns are respectively arranged on both sides of the feed port 13. The two ends of the first ventilation pipe 12 are respectively mounted on the upper ends of the two columns and fixedly connected to the two columns. The two ends of the second ventilation pipe are respectively connected to the first ventilation pipe 12 and the air supply system. The first valve body 122 is installed on the second ventilation pipe, and the second ventilation pipe is fixedly connected to one of the columns. Among them, one end of the first ventilation pipe 12 is closed, and the other end is connected to the second ventilation pipe.

[0037] For other contents of the device for preventing cooling water from flowing out of a mist cooling tank described in the present invention, please refer to the prior art and will not be described in detail here.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for preventing cooling water from flowing out of a mist cooling tank, characterized in that: The machine comprises a frame, a first ventilation pipe and a mist cooling trough, wherein the first ventilation pipe and the mist cooling trough are both installed on the frame, the mist cooling trough is provided with a feed port and a discharge port, the steel plate enters the mist cooling trough from the feed port and is discharged from the discharge port, the first ventilation pipe is close to the feed port and is located above the steel strip, the first ventilation pipe is arranged horizontally, and a plurality of blowing ports with openings obliquely downward are arranged at intervals on the first ventilation pipe, and each blowing port is used for blowing air into the mist cooling trough.

2. The device for preventing cooling water from flowing out of a mist cooling tank according to claim 1, characterized in that: Also included is an air supply system, the air supply system being in communication with the first ventilation pipe and being used to supply air into the first ventilation pipe; One end of the first ventilation pipe is closed, and the other end is connected to the air supply system.

3. The device for preventing cooling water from flowing out of a mist cooling tank according to claim 2, characterized in that: It also includes a first valve body, which is located between the plurality of air blowing ports and the air supply system, and is used to control the gas to enter the plurality of air blowing ports.

4. The device for preventing cooling water from flowing out of a mist cooling tank according to claim 3, characterized in that: A counter is also included, which can record the running meters of the steel strip.

5. The device for preventing cooling water from flowing out of a mist cooling tank according to claim 3, characterized in that: It also includes air nozzles corresponding to the blowing ports one by one, each of the air nozzles is installed on the vent pipe and communicated with the inside of the vent pipe, and each of the air nozzles is used to blow air toward the surface of the steel strip.

6. The device for preventing cooling water from flowing out of a mist cooling tank according to claim 3, characterized in that: The frame is provided with two vertical columns, the two columns are respectively arranged on both sides of the feed port, and the two ends of the first ventilation pipe are respectively connected to the two columns.

7. The device for preventing cooling water from flowing out of a mist cooling tank according to claim 6, characterized in that: It also includes a second ventilation pipe, the two ends of which are respectively connected to the first ventilation pipe and the air supply system, the first valve body is installed on the second ventilation pipe, and the second ventilation pipe is connected to one of the columns.

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