JPH0337767Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Industrial Application Field The present invention relates to a cleaning liquid injection device for a rolling mill.

B. Prior Art In a cold rolling tandem rolling mill, when the tip of a strip passes between rolling rolls, the top (tip) of the strip or the biting roll immediately before the strip bites into the rolls. A cleaning liquid is sprinkled on the top part to wash off the oil adhering to that part and increase the coefficient of friction, thereby improving the ability of the top part to bite into the roll.

Conventionally, an operator has used a ladle to sprinkle the cleaning liquid onto the strip or roll.

C. Problems that the invention aims to solve This requires manpower and requires workers to be stationed at each stand, which hinders labor-saving and requires workers to enter inside the stand. Therefore, it was not desirable from a safety point of view. Also,
There are also variations in the timing of applying the cleaning solution,
The effects were also unstable.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention aims to provide a cleaning liquid injection device for a rolling mill that can mechanically spray cleaning liquid in a well-timed manner and is superior in labor saving and safety.

D. Means for Solving the Problems In order to achieve the above object, the present invention has the following configuration. That is, there is a cleaning fluid injection gun 10 that can always be filled with pressurized cleaning fluid up to just before the nozzle and that opens upon receiving air supply and has a valve that injects the cleaning fluid, and an air supply valve 20 that sends air to the gun.
a steel plate position detection means 30 for sensing the position of the tip of the steel plate with respect to the rolling roll B; a valve operation means for opening the air supply valve for a certain period of time in response to a signal from the detection means; and supplying cleaning liquid to the gun 10. The present invention is to have a liquid feeding device 50 that does the following.

E. Effect When the tip of the strip advances to just before the rolling roll, the steel plate position detection means detects this and the valve operation means is actuated to inject cleaning liquid and spray the tip of the strip for cleaning.
This increases the coefficient of friction at the tip of the strip, making it easier for the strip to get caught in the rolling roll.

F. Embodiment An embodiment of the present invention will be described below based on the drawings.

In the figure, the cleaning liquid injection device of the present invention is installed just before each rolling roll B, and includes a cleaning liquid injection gun 10 facing the threading line of the steel plate strip A, an air supply pipe 60 and a cleaning liquid pipe 70 connected to the gun.
An electromagnetic air supply valve 2 interposed in the middle of the air supply pipe 60
0, a steel plate position detection means 30 for detecting the passage of the tip of the strip A, and an air supply valve operating means 2 for opening the air supply valve 20 in response to a signal from the detection means.
1, and a liquid feeding device 50 that supplies cleaning liquid to the cleaning liquid injection gun 10 via a cleaning liquid pipe 70.

The cleaning liquid injection gun 10 is an automatic gun, in which pressurized cleaning liquid is constantly filled up to the base of the nozzle, and a built-in valve is instantly opened by air supply, allowing the cleaning liquid to be sprayed. There is. The gun is swingable back and forth and left and right with respect to the sheet passing line via a shaft 11 so that the cleaning liquid can be sprayed uniformly onto the strip A.

A stop valve 1, an air filter 22, and an oiler 23 are provided upstream of the air supply valve 20, and a pressure reducing valve 2 is interposed between these. The air supply valve 20 is normally closed.

The air supply pipe 60 includes a main pipe 61, a branch pipe 62 branched from the main pipe, a pump side branch pipe 63 further branched from the branch pipe, and a gun side branch pipe 64 with the air supply valve 20 interposed in the middle. Become. The end of the pump side branch pipe 63 is connected to the pump 52 of the liquid delivery device 50 via a flexible hose 63a and the pressure reducing valve 2, and the end of the gun side branch pipe 64 is connected to the gun 10 via a flexible hose 64a.

The cleaning liquid pipe 70 is connected to the pump 52 of the liquid feeding device 50.
a flexible hose 71a made of an oil-resistant material and connected to the hose; a liquid main pipe 71 connected to the tip of the hose; and an oil-resistant flexible hose branched from the liquid main pipe and connected to the gun 10 at the other end. 7
1b.

The liquid feeding device 50 includes a tank 5 in which cleaning liquid is stored.
1 and a pump 52 that is installed above the tank and always discharges liquid at a constant pressure, and the pump is driven by an air motor that is operated by air supplied through a branch pipe 63.

Next, as the steel plate position detection means 30, an X-ray detection device is used. This device consists of an X-ray transmitter and a receiver, which senses the tip of strip A and emits a signal.

A well-known electromagnetic solenoid is used as the air supply valve operation means 21 provided in the air supply valve 20, and operates to open the air supply valve 2 for a certain period of time via a timer upon receiving a signal from the steel plate position detection means 30. do.

The operation mode will be explained above. When the tip of the strip A advances to just before the rolling roll B, the position detecting means 30 detects this and the air supply valve operating means 2
1 to open the air supply valve 20 for a certain period of time. When the air supply valve 20 is opened, the gun side branch pipe 64 and the flexible pipe 64 are
Compressed air is sent to the cleaning liquid injection gun 10 via a. Since the gun 10 is always filled with pressurized cleaning liquid up to the base of the nozzle, the supplied air instantly opens the valve and sprays the cleaning liquid, so that the cleaning liquid is uniformly applied to the tip of the strip A. The oil is dispersed and adhered, and the oil in this area is washed and removed.

As a result of this action, the friction coefficient of the strip A is increased and the strip A is easily bitten by the rolling roll B.

A cleaning liquid spray gun 10 is provided on each inlet side of each rolling roll B.

Further, the air supply valve 20 may be operated by a microcomputer in addition to the embodiment described above.

G. Effect of the invention As described above, the present invention provides a cleaning liquid injection gun 10 which can always be filled with pressurized cleaning liquid up to just before the nozzle, and which has a valve that opens upon receiving air supply and injects the cleaning liquid, and the gun. an air supply valve 20 that sends air to the
A steel plate position detection means 30 for sensing the position of the tip of the steel plate with respect to the rolling roll B, a valve operation means for opening the air supply valve for a certain period of time in response to a signal from the detection means, and a liquid for supplying cleaning liquid to the gun 10. Feeding device 5
0. Therefore, it is possible to mechanically sprinkle an appropriate amount of cleaning liquid onto the tip of the steel plate strip at a well-timed and constant pressure, which saves labor and ensures safety, and also reduces the amount of cleaning liquid used.

[Brief explanation of the drawing]

The figure is a front view system diagram showing an embodiment of the present invention. A... Strip, B... Roll, 10...
...Cleaning liquid injection gun, 20...Air supply valve, 30...Steel plate position detection means, 50...Liquid feeding device, 60...Air supply pipe.

Claims (1)

[Scope of utility model registration request] A cleaning liquid injection gun 10 that can always be filled with pressurized cleaning liquid up to just before the nozzle and that opens upon receiving air supply and has a valve that injects the cleaning liquid; an air supply valve 20 that sends air to the gun; Steel plate position detection means 30 for sensing the position of the tip of the steel plate with respect to roll B
A cleaning liquid injection in a rolling mill characterized in that it has: a valve operating means for opening the air supply valve for a certain period of time in response to a signal from the detection means; and a liquid feeding device 50 for feeding the cleaning liquid to the gun 10. Device.