JPH044042B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an oil mist recovery device in a rolling equipment, and in particular, in a rolling equipment, a plurality of rolling mills are arranged in series, and a type of oil mist is collected for each classified rolling mill. The present invention relates to an oil mist recovery device suitable for using different rolling oils.

[Background of the invention]

In rolling equipment, rolling oil is used for cooling and lubricating the rolls of the rolling mill and the objects to be rolled, and this rolling oil turns into oil mist during rolling operations, deteriorating the surrounding environment. Furthermore, the amount of oil mist that is scattered is enormous, and rolling oil is wasted accordingly. Therefore, it is desired to efficiently suck this oil mist from around the rolling mill and to recover and reuse the sucked oil mist.

Conventionally, in order to prevent environmental deterioration, an open hood was placed above the rolling mill, and the oil mist sucked together with air from this open hood was collected by a mist collector installed in the middle of the exhaust duct, and the oil mist was removed. The purified air is released into the atmosphere.

Since the conventional open hood exhaust method has a large air suction area, the amount of exhaust air is large. For this reason, the capacity of the exhaust duct, mist collector, and exhaust fan connected to the open hood must be increased, which increases the amount of equipment and operating costs, and it is difficult to reliably suck the oil mist. The disadvantage is that the oil mist that is not sucked out spreads to the surrounding area, resulting in a deterioration of the working environment.

In addition, rolling equipment usually has multiple rolling mills arranged in series, and the optimal rolling oil is used for each of these multiple rolling mills, so the oil collected by the mist collector is a mixture of multiple rolling oils. Therefore, it is difficult to reuse and the recovered oil must be disposed of.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and it is possible to reliably suck oil mist generated from a rolling mill, and even when oil mist with different properties is generated from multiple rolling mills, it can be used to absorb oil mist that has common properties. It is an object of the present invention to provide an oil mist recovery device for rolling equipment that can collect oil mist separately and reuse the recovered oil.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention provides a rolling equipment in which a plurality of rolling mills are arranged in series. , a partition wall that divides the inside of the chamber into rolling mills that use the same type of rolling oil, and a partition wall that is installed in each divided chamber space so that each rolling mill that uses the same type of rolling oil stays in the chamber. A duct that sucks and collects the oil mist, a mist collector installed in each duct that collects and liquefies the oil mist, and a system that uses the liquid oil collected by the mist collector. A pipe line returns to the oil pan of each rolling mill, and the divided chamber is divided into a stand chamber where the rolling mill is located and a spindle chamber where the spindle is located, and the oil in the stand chamber is drained from the vent hole formed above. It is characterized by comprising an intermediate wall that allows mist to flow into the spindle chamber, and a suction port that is formed in the spindle chamber and communicates with the duct.

According to the present invention, each of the divided rolling mills is surrounded by a chamber isolated from the external atmosphere,
The oil mist generated during the rolling operation and accumulated in the chamber is suctioned by a separate system for each chamber,
The sucked oil mist is collected individually, and the collected liquid oil is sent through a circulation system to each rolling mill that uses the oil.

In addition, the chamber is divided by an intermediate wall into a stand chamber where the rolling mill is located and a spindle chamber where the spindle is located, and the oil mist from the stand chamber is passed through the spindle chamber from a vent formed above. Since the oil is allowed to flow through the duct, the speed of the airflow can be rapidly reduced in the spindle chamber, and as a result, rolling oil droplets moving on the airflow can be separated and removed within the spindle chamber. Furthermore, since the oil mist in the stand chamber flows upward from the lower side of the operating surface of the rolling mill toward the vent, it does not diffuse from the stand chamber into the outside atmosphere.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the oil mist recovery device for rolling equipment according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram of a rolling facility to which the present invention is applied, and FIG. 2 is a cross-sectional view taken along the line ``top'' in FIG. 1. The rolling equipment shown in the figure has five rolling mills arranged in series, and the first four rolling mills 12 are
It includes a work roller 14 and a pressure roller 16, and uses the same type of rolling oil. 14A is a spindle of the work roll 14, 14B is a gearbox, and 14C is a motor. The final rolling mill 18 includes work rolls 14,
It is equipped with a pressure roll 16 and an intermediate roll 20, and uses a different type of rolling oil from the four rolling mills 12. The steel plate 22 is rolled by the rolling mills 12 and 18, and finally wound onto a carousel reel 23. Reference numerals 24 and 25 denote oil pans, and rolling oil stored in the oil pans 24 and 25 is pumped up by an oil pump (not shown) and injected to the rolling mills 12 and 18. The surroundings of the rolling mills 12, 18 and carousel reel 23 are divided and isolated from the outside atmosphere by a chamber. That is, a chamber 26 that commonly accommodates the first four rolling mills 12, a chamber 28 that accommodates the rolling mill 18, and a chamber 30 that surrounds the carousel reel 23 are provided. The chamber 26 and the chamber 28 are separated by a partition plate 36, and both chambers 26 and 28 are further separated by a stand chamber 12 with a mill stand as shown in FIG.
0, and the spindle chamber 12 with the spindle.
It is divided into 1. The stand chamber 120 and the spindle chamber 121 are partitioned by an intermediate wall 123 and communicated with each other through a vent 128 provided at the upper part thereof. There are an upper door 125 and a lower door 127 on the front side wall of the stand chamber 120, which are opened and closed for exchanging rolls and for ventilation. stand chamber 12
An intake duct 160 opens at the upper part of the front side of the stand chamber 120 and guides air from the front side of the stand chamber 120 to the rear upper part of the spindle chamber 121.

In FIG. 1, the chamber 30 has a shape similar to an open hood. Moreover, three air suction ports 44 are connected to the ceiling surface 42 of the chamber 26 at appropriate locations, and each air suction port 44 is connected to a duct 46 of the first system. A damper 48 is provided at a position where the suction port 44 connects to the duct 46.
This damper 48 adjusts the amount of air sucked in, and a portion of the oil mist in the sucked air collides with the damper 48 and becomes liquefied. Duct 4
The bottom surface of the duct 6 is formed with a liquid-like slope with a small slope, and the oil mist liquefied by colliding with the damper 48 and the oil mist liquefied while passing through the duct are collected in the concave portion 50. A small-diameter pipe line 52 is connected to each of the recesses 50, and this pipe line 52
One end is connected to the oil pan 24. Therefore, the oil mist liquefied in the duct 46 is
The oil is collected from the recess 50 on the bottom of the duct through the conduit 52 to the oil pan 24 and reused. Further, a first system primary mist collector 54 is provided on the downstream side of the duct 46, and most of the oil mist is collected by this primary mist collector 54. The collected oil mist is collected in the oil pan 24 via the pipe 56 and reused. Chamber 28, Chamber 30
Similarly to the above, air suction ports 58 and 60 are connected to the duct 62 of the second system. The oil mist liquefied in this duct 62 and the duct 62
The primary mist collector 6 of the second system installed on the downstream side of
The oil mist collected in step 4 is collected in the oil pan 25 via a pipe 66 and reused.

After removing most of the oil mist by the mist collectors 54, 64, the air sucked from each chamber is combined and discharged to the atmosphere via a final mixed mist collector 68. Since the oil mist collected by the mist collector 68 is a mixture of different types of rolling oil, it cannot be reused. Therefore, the conduit 70
After that, the mixed oil stored in the waste oil tank 72 is disposed of or otherwise disposed of.

According to this embodiment, for a group of rolling mills 12 that use the same type of rolling oil, these rolling mills 12 are surrounded by a common chamber 26 via a partition plate 36, and the oil mist generated from the rolling mills 12 is prevented. Collect in the first system. Further, the rolling oil used in the rolling mill 12 is
The rolling mill 18 and the subsequent carousel reel 23, which use different types of rolling oil, are surrounded by independent chambers 28 and 30, respectively, and the oil mist generated from these devices is collected by a second system.
Therefore, the rolling oil collected for each system can be returned to the original oil pan 24 or 25 and reused.

Also, during rolling work, the upper door 125 is closed and the lower door 1
Open 27. By means of intake fans (not shown) provided at the rear ends of the air bleed ducts 46, 62, the air within the stand chamber 120 flows into two air streams A and B, as shown by the arrows in FIG. That is, it rises along the front surface of the stand chamber 120 and connects the front door and the stand chamber 120.
An air curtain is formed between the intake duct 16 and
Airflow A drawn from 0 and stand chamber 12
This is the airflow B that passes through the space within 0, passes through the upper ventilation hole 128 of the intermediate wall 123, and reaches the spindle chamber 121. The air flow rates of A and B can be easily adjusted by changing the opening area of a louver or the like provided in the vent 12. Here, the intermediate wall 123
Without it, airflow would flow from the lower door 127 through the relatively low part of the stand chamber 120 and into the bleed air duct 6.
It flows almost linearly to the opening of No. 2, and the upper part is easily filled with fume. In addition, as it becomes difficult for upward flow to occur along the front surface, making it difficult to form an air curtain, air containing mist may leak from the gap between the front doors and contaminate the surrounding area. .

When the airflow flowing in the direction B from inside the stand chamber 120 passes through the upper ventilation port 128, it enters the spindle chamber 121 having a wide space, where the airflow speed suddenly decreases. Therefore, the rolling oil droplets moving on the airflow are separated and removed. The separated rolling oil droplets are transferred to the spindle chamber 12.
The oil falls onto the floor of No. 1, is recovered by an oil recovery system (not shown), and is reused as rolling oil. Furthermore, the mist contained in the airflow is removed from the air extraction ducts 46 and 62.
The mist is separated and collected by the primary mist collectors 54 and 64 provided in the main mist collectors 54 and 64, respectively.

In this way, each chamber is isolated from the outside atmosphere, and the opening for taking in outside air is kept to the minimum necessary, with only the lower part on the operation surface side of the rolling mill. Therefore, the oil mist generated from the rolling mill can be reliably sucked with a minimum amount of suction air. Therefore, the capacity of the duct, mist collector, and exhaust fan can be reduced, which contributes to a reduction in equipment costs and operating costs, and it is possible to maintain a good external atmosphere, that is, a working environment.

In the embodiment described above, it is preferable that an oil cleaning means for spraying hot water, steam, or other detergent is attached to the mist collector in the duct of each system.
This oil cleaning means is effective for washing away oil stuck to the inner surface of the duct and the elements of the mist collector when the operation of the rolling mill is stopped. By washing away the oil adhering to the rolling oil, it is possible to prevent it from mixing with newly used rolling oil.

〔Effect of the invention〕

According to the present invention, oil mist generated from a rolling mill can be reliably sucked in with a minimum suction air volume, and a good working environment can be maintained. Further, even when oil mist with different properties is generated from a plurality of rolling mills, the oil mist having common properties can be collected in a separate system, so the collected oil can be reused.

According to the present invention, when the airflow inside the stand chamber passes through the upper ventilation hole of the intermediate wall, it enters the spindle chamber having a wide space, where the airflow speed decreases rapidly, so that the airflow moves along with the airflow. The rolling oil droplets present are separated and removed. The mist contained in the airflow is separated and collected by a mist collector installed in the duct.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an oil mist recovery device in a rolling facility according to the present invention, and FIG. 2 is a side sectional view of FIG. 1. 12, 18...Rolling mill, 24...Oil pan, 2
6, 28, 30...Chamber, 34...Side plate, 36...
Partition wall, 44, 58, 60... Air intake port, 4
6, 62... Duct, 52, 56... (Recovered oil) pipe line, 54, 64... Mist collector, 120...
Stand chamber, 121...Spindle chamber, 123...Intermediate wall, 127...Lower door, 128...Upper vent.

Claims (1)

[Scope of Claims] 1. In a rolling equipment in which a plurality of rolling mills are arranged in series, a chamber that opens the lower side of the operating surface of the rolling mill and seals the sides and upper part of the rolling mill; A partition wall that separates rolling mills that use the same type of rolling oil, and a partition wall that is installed in each divided chamber space to remove oil mist accumulated in the chambers of each rolling mill that uses the same type of rolling oil. A duct for suction and recovery, a mist collector installed in each duct to collect oil mist and liquefy it, and a mist collector that collects the oil mist and liquefies it, and transfers the liquid oil collected by the mist collector to each rolling mill that uses the oil. The pipe line returns to the oil pan, and the divided chamber is divided into a stand chamber where the rolling mill is located and a spindle chamber where the spindle is located, and the oil mist from the stand chamber is transferred to the spindle chamber from the vent hole formed above. 1. An oil mist recovery device for rolling equipment, comprising: an intermediate wall for flowing oil into a spindle chamber; and a suction port formed in a spindle chamber and communicating with the duct.