CN106763215B

CN106763215B - Waterproof method for supporting roll bearing seat of cold-rolled steel plate line

Info

Publication number: CN106763215B
Application number: CN201710003169.6A
Authority: CN
Inventors: 李华一
Original assignee: Beijing Aofangdexin Science & Technology Co ltd
Current assignee: Hebei Feihu industrial Internet Technology Co.,Ltd.
Priority date: 2017-01-03
Filing date: 2017-01-03
Publication date: 2021-01-15
Anticipated expiration: 2037-01-03
Also published as: CN106763215A

Abstract

The invention provides a waterproof method for a supporting roll bearing seat of a cold-rolled steel plate line. The waterproof method is characterized in that a gas purging pipe (5) is arranged on the lower side of a waterproof rubber plate (4) on the inner side of a bearing seat (2), a thin wind line is arranged in the direction of a supporting roller (1), purging gas (6) is sprayed to the 45-degree angle of the axial center line of the supporting roller (1) to form a compressed air barrier, and liquid splashed on the section of shaft is immediately blown away by compressed air, so that the liquid can not enter the bearing seat (2) along with the rotation of the shaft. An automatic gas supply system is additionally arranged on the gas purging pipe (5), the gas supply system is controlled by stopping spraying water through the cooling medium pipe (7), gas starts to be purged immediately as long as the water way is opened to spray water, and the problem of water inflow of the supporting roller bearing seat of the cold-rolled steel plate line is intelligently solved.

Description

Waterproof method for supporting roll bearing seat of cold-rolled steel plate line

Technical Field

The invention relates to a method and a device for preventing water of a back-up roll bearing seat of a cold-rolled steel plate line, in particular to a method for well solving the problem of water inflow of the back-up roll bearing seat of the cold-rolled steel plate line, which can thoroughly solve the problem of water inflow of the back-up roll bearing seat of the cold-rolled steel plate line used on line.

Background

The rolling mill of the cold-rolled steel plate line is provided with a plurality of rollers, the steel plate to be rolled on line is a cold plate, the temperature of the rolling mill is monitored by 60 ℃, in order to ensure that the rollers are durable and do not deform, the temperature of a shaft is strictly controlled not to rise, the rollers are provided with high-pressure water spray heads, a large amount of cooling media are sprayed on the rollers and the rolled steel plate, the cooling media use emulsion, the components of the emulsion are rolling oil and desalted water, the temperature of the emulsion is 55 ℃, and the emulsion is sprayed to ensure that the highest temperature of the rollers on line cannot exceed 60 ℃. As the temperature of the roller is ensured not to exceed the standard, a large amount of emulsion is required to be sprayed to the roller shaft, the pressure of a pipeline for spraying the emulsion is not lower than 0.6MPa, the emulsion pressure is high, the sprayed medium amount is large, the diameter of supplied liquid from a pipeline is 60.3mm, a cooling water pipeline parallel to the roller is respectively arranged above and below each roller, 20 nozzles are arranged on the pipeline according to the width of a rolling line, the diameter of each nozzle is 25mm, and a spraying line is arranged on each nozzle, so that the liquid sprayed out of the nozzles after the emulsion passes through the pipe is fan-shaped. When the steel plate is rolled, the steel plate passes between the rollers, all the cooling pipelines start to spray high-pressure medium to the supporting rollers and the rolled steel plate, and the scene is spectacular. However, in this spectacular back, the chock of the backup roll bears a great problem. The rubber sealing ring of the backup roll on the bearing seat is close to the high-speed rotating backup roll shaft, and the sprayed liquid of the medium can continuously invade into the bearing seat one by one under the action of the high-speed rotating shaft, which is the important reason that the bearing seat with the sealing ring and the water-retaining rubber plate can still enter and remove water. The bearing used on the cold rolling line is TINKEN imported from Sweden, and the original price is 42 ten thousand RMB, because the bearing has bad operation environment, large specification, special operation environment and high processing difficulty, the bearing can not be produced at present in China. As the bearing bears the supporting roller to rotate at a high speed, the bearing in the bearing seat needs a large amount of lubricating oil to be cooled and lubricated during operation, the lubricating oil is No. 320 shell, is supplied by a gear oil pump through a 15mm oil pipeline, the oil pressure is 1.2-1.4bar, the pump flow is 1500 liters/hour, and the oil storage capacity of the lubricating oil for recycling is 15000 liters. The bearings are lubricated and radiated completely by a large amount of lubricating oil during high-speed operation, so that the lubricating oil has high requirements. After water enters the bearing, the water and the oil are fused together, and the oil is not oil any more and the water is not water any more. The rolling process is characterized in that water exists in oil, the oil is carried in the water, cylindrical balls in the bearings cannot be lubricated and rotate to generate unsmooth, heat generated by the bearings cannot be dissipated, at the moment, an event of burning the bearings can easily occur, the bearing in operation is very dangerous, a production line cannot be stopped randomly when rolling steel plates, the bearing cannot be maintained timely, the bearing rotating at high speed continues to operate in oil-water mixed liquid, the temperature rises quickly, the bearing losing the lubrication can be damaged instantly, after the bearing is damaged, the safety of the shaft is directly threatened, the rotating speed of the bearing of the acid rolling support roll is about 300 r/min, the shaft can be damaged quickly, the rolling cost of the bearing and the shaft damage is greatly increased, the caused loss is huge, and the loss is difficult to bear by any enterprise frequently. Therefore, many enterprises are continuously studying how to control water, and water is not allowed to flow into the bearing, so that huge loss caused by water inflow of the bearing is reduced. However, no good method for solving the problem exists, the reason for the water inflow is not found at all, and the problem can be solved by finding the reason for the water inflow. The real reason for water inflow is found, and the problem of water inflow of the bearing can be radically solved.

Disclosure of Invention

The invention aims to provide a waterproof method for a supporting roll bearing seat of a cold-rolled steel plate line. The waterproof method of the supporting roll bearing seat of the cold-rolled steel plate line is characterized in that a compressed air annular pipeline is additionally arranged on the lower side of a water-retaining rubber plate and on the inner side of the bearing seat, a thin wind line is arranged in the annular pipeline towards the supporting roll, compressed air is sprayed towards the 45-degree angle of the central line of the shaft, the sprayed line is annular, the compressed air sprayed towards the shaft surface by the annular pipeline forms a compressed air barrier, cooling media are prevented from being sprayed on the shafts at the two ends of the high-speed rotating supporting roll, and the shaft surface of the section is always dry and free of any liquid. The liquid splashes on the section of the shaft and is immediately blown away by the compressed air, so that the liquid can not enter the bearing seat along with the rotation of the shaft any more. Under the condition of not changing the current online running bearing seats of the supporting roller, an annular purging pipeline is arranged at the position of the end face with a shaft inserted in the box-type shell of each bearing seat, the annular shaft is 50mm higher than the annular shaft, the diameter of the annular purging pipeline is about 20mm, and an air inlet is connected with a compressed air source. The annular purging pipe is provided with a specially designed injection line for purging compressed air, and the purging direction of the annular purging pipe is 45 degrees of an included angle of the axis center line. An automatic air supply system is additionally arranged on a compressed air pipeline, the air supply system is controlled from the beginning to the end of the spraying of a cooling medium, and water spraying gas starts to purge immediately as long as a water channel is opened, so that a set of intelligent waterproof method for the supporting roll bearing seat of the cold-rolled steel plate line is formed.

The technical solution of the invention is as follows:

a water-proof method for the supporting roller bearing seat of cold-rolled steel plate line is composed of two parts. A first part: an axial gas purge system. A second part: automatic gas supply system

A waterproof method for a supporting roll bearing seat of a cold-rolled steel plate line. The components and the specific functions are as follows:

a first part: axial gas purging system

The axial gas purging system adopts a circular pipe with the diameter of 20mm, the circular pipe is manufactured into a circular ring by stewing, the shaft of a supporting roller of the circular pipe with the diameter is 50mm higher, the gas purging pipe is manufactured into a circular ring shape and is provided with an air inlet pipe, and the air supply pressure of the gas purging pipe is not less than 0.5 MPa. The gas purging pipe is arranged below the water retaining rubber plate, compressed air gas is sprayed to the direction of the inclined 45-degree included angle of the supporting roller shaft by the gas purging pipe, the sprayed gas forms a gas barrier, and a cooling medium is purged at the shaft end part cleanly, so that liquid cannot enter the bearing seat of the supporting roller.

A second part: automatic gas supply system

The automatic air supply system is to save the supply of compressed air. The function of the device is that when the cooling medium is not sprayed, the gas cannot be sprayed out, and when the cooling medium is sprayed, the gas is sprayed out. The upper part and the lower part of each roller are respectively provided with a cooling water pipeline parallel to the rollers, the pipeline is higher than the upper plane of a bearing seat, a group of waterproof correlation type photosensitive switches are respectively arranged on the bearing seats at the two ends of the supporting roller, rays of the photosensitive switches are arranged at the lower position of the cooling water pipeline, the photosensitive switches are connected with a relay, a normally open contact supplies power to an electric control air supply valve, when cooling media start to spray water, the sprayed media block the sprayed photosensitive rays, and the normally closed contact is powered off at the moment, the relay is switched to be closed by the normally open contact, so that the power supply is switched on. After the power supply is switched on, the electric control air supply valve is opened, and the annular pipeline starts to spray compressed air. The compressed air in the annular pipeline starts to spray purge gas at the moment of spraying the cooling medium, so that the cooling medium is ensured not to enter bearing seats at two ends of the supporting roller along with the shaft rotating at high speed.

Drawings

FIG. 1 is a view showing the installation position of a gas purge system

FIG. 2 gas purge cross-sectional view

FIG. 3 gas supply automation system circuit diagram

The components in the drawings are numbered as follows:

the device comprises a supporting roller 1, a bearing seat 2, a flange pressing plate 3, a waterproof rubber plate 4, a gas purging pipe 5, purging gas 6, a cooling medium pipe 7, a first photosensitive switch 8, a second photosensitive switch 9, a transformer 10, a relay 11, a first electric control gas supply valve 12 and a second electric control gas supply valve 13.

Detailed Description

The invention is further described with reference to the accompanying drawings in which:

as shown in figures 1 and 2, the mounting position diagram is implemented by a supporting roll bearing seat waterproof method of a cold-rolled steel plate line, bearing seats 2 are arranged at two ends of a supporting roll 1, a flange pressing plate 3 is arranged on the inner side of each bearing seat 2, and a waterproof rubber plate 4 is fixed by the pressing plate and is used for preventing cooling media from being sprayed onto a shaft and trying to prevent the media from entering the bearing seats. A gas purging pipe 5 is arranged below the waterproof rubber plate 4, a circular pipe with the diameter of 20mm is roasted into a circular ring, and the diameter of the circular ring is 50mm larger than that of the supporting roller. An air inlet pipe is arranged below the annular pipe, and the air supply pressure of the air inlet pipe is not less than 0.5 MPa. The waterproof rubber plate 4 blocks a large amount of liquid media splashed on the shaft, so that the amount of residual liquid on the shafts at the two ends of the supporting roller 1 is not large, the gas purging pipe 5 is provided with a specially designed spraying line for purging compressed air, the gas purging pipe is used for spraying purging gas 6 towards the direction of an inclined angle of 45 degrees inclined to the axis of the supporting roller, the sprayed gas forms a gas barrier, the residual cooling medium is purged at the end part of the shaft completely, and any liquid can not enter the bearing seat of the supporting roller along with the rotation of the shaft, so that the water entering of the bearing seat is avoided.

Fig. 3 is a circuit diagram of the gas supply automation system. The automatic air supply system consists of a cooling medium pipe 7, a first photosensitive switch 8, a second photosensitive switch 9, a transformer 10, a relay 11, a first electric control air supply valve 12 and a second electric control air supply valve 13. The air supply automation system is used for saving the supply of compressed air, and the working principle is as follows: when the rolling mill starts to operate, the cooling medium pipe 7 starts to supply water, and when the rolling mill stops operating, the cooling medium pipe 7 stops supplying water. The spraying and stopping of the purge gas 6 are controlled by spraying and stopping water through the cooling medium pipe 7. When water supply is started, a cooling medium pipe 7 sprays cooling medium, a group of waterproof photosensitive switches I8 and II 9 which are opposite to each other in light are respectively arranged on bearing seats at two ends of a supporting roller and connected with and control a relay 11, the rays of the photosensitive switches are arranged below a cooling medium pipeline, when the cooling medium pipe 7 starts to spray water, the rays sprayed by the photosensitive switches I8 and II 9 are blocked by the medium, at the moment, a normally open contact of the relay 11 is powered off, the normally closed contact is closed to enable an electric control gas supply valve I12 and an electric control gas supply valve II 13 to be powered on, after the electric control gas supply valve is powered on, a gas purging pipe 5 starts to spray purging gas 6, compressed air of the gas purging pipe 5 starts to spray the purging gas 6 at the moment of spraying water, the sprayed gas forms a gas barrier, and the residual cooling medium is purged at the end part of a shaft cleanly, the cooling medium is ensured to not enter bearing seats at two ends of the supporting roller along with the shaft rotating at high speed any more. When the cooling medium pipe 7 stops spraying the cooling medium, as no medium shields rays emitted by the first photosensitive switch 8 and the second photosensitive switch, the normally open contact of the relay 11 is powered off, the normally closed contact is switched to the position, the first electric control gas supply valve 12 and the second electric control gas supply valve 13 are powered off, and compressed air of the gas purging pipe 5 stops being supplied. The power supply of the gas supply automation system is supplied by a transformer 10, and the transformer 10 changes 220V power supply into 24V power supply to be supplied to components.

Claims

1. A waterproof method for a supporting roll bearing seat of a cold-rolled steel plate line is characterized by comprising the following steps: the waterproof method of the supporting roll bearing seat of the cold-rolled steel plate line consists of an axial gas purging system and an automatic gas supply system; the axial gas purging system consists of a supporting roller (1), a bearing seat (2), a flange pressing plate (3), a waterproof rubber plate (4), a gas purging pipe (5) and purging gas (6), and the gas supply automatic system consists of a cooling medium pipe (7), a first photosensitive switch (8), a second photosensitive switch (9), a transformer (10), a relay (11), a first electric control gas supply valve (12) and a second electric control gas supply valve (13); the waterproof method of the supporting roll bearing seat of the cold-rolled steel plate line comprises the following steps: bearing frame (2) are at the both ends of backing roll (1), inboard at the bearing frame, flange clamp plate (3) are equipped with, waterproof rubber plate (4) are fixed to the clamp plate, be gas purging pipe (5) below it, gas purging pipe (5) have a special design's the ray that spouts that sweeps compressed air, to backing roll (1) axle center slope 45 degrees contained angle directions injection purging gas (6), the gas of injection forms one gas barrier, make liquid can't get into in the backing roll bearing frame along with the rotation of axle again.

2. The method for waterproofing a backup roll bearing housing of a cold-rolled steel sheet line according to claim 1, characterized in that: the gas supply automatic system controls the gas spraying and stopping of the purging gas (6) by the water spraying and stopping of the cooling medium pipe (7), when the cooling medium pipe (7) starts to spray water, the medium blocks the rays emitted by the first photosensitive switch (8) and the second photosensitive switch (9), the normally open contact of the relay (11) is controlled to be powered off, the normally closed contact is closed to enable the first electric control gas supply valve (12) and the second electric control gas supply valve (13) to be opened, the gas purging pipe (5) starts to spray the purging gas (6), when the cooling medium pipe (7) stops spraying the cooling medium, no medium blocks the rays emitted by the first photosensitive switch (8) and the second photosensitive switch (9), the normally open contact of the relay (11) is powered off, the normally closed contact is switched to the position, the first electric control gas supply valve (12) and the second electric control gas supply valve (13) are powered off, the supply of compressed air to the gas purge pipe (5) is stopped.