CN109940046A - A hot oil edge injection system for an aluminum rolling mill - Google Patents

Abstract

The invention belongs to aluminum strips to roll field, in particular to the hot oil edge spraying system of a kind of aluminum cold-strip mill rotation includes at least oil supply loop and grease-box, which further includes hot oil case, and hot oil case fuel feed hole is connected to oil supply loop；Pump oil portion, pump oil portion fuel feed hole are connected to hot oil case oil outlet；Pressure regulating part, pressure regulating part one end are connected to pump oil portion oil outlet, and the other end is connected to hot oil lower box part；Ejection section, ejection section fuel feed hole is connected to pump oil portion oil outlet present invention can ensure that the temperature and pressure of hot oil edge spraying system are constant, and then during the rolling process, stable supplementary heating is carried out to working roll edge, to solve the too fast caused working roll edge roll thermal crown of working roll edge heat dissipation and middle part roll thermal crown different problems, so that the plate shape of band is improved.

Description

A hot oil edge injection system for an aluminum rolling mill

technical field

The invention relates to the field of aluminum strip rolling, in particular to a hot oil edge injection system of an aluminum rolling mill.

Background technique

In the production process of aluminum strip cold rolling, the heat radiation from the edge of the work roll is greater than that of the middle, so there will be a temperature difference between the edge and the middle of the work roll, that is, the temperature of the edge of the work roll is lower than the temperature of the middle, which makes the The thermal crown of the edge of the work roll is different from the thermal crown of the middle. In the process of strip rolling, the phenomenon of edge tightness occurs, which seriously affects the shape of the strip, and even leads to accidents such as strip breakage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hot oil edge injection system for an aluminum rolling mill, which is to heat the edge of the work roll of the aluminum rolling mill to solve the problem of heat radiation from the edge and the middle of the work roll during the rolling process of the aluminum strip. Strip shape defects and strip breakage caused by different thermal crowns of work rolls.

The technical problem solved by the present invention can be realized by the following technical solutions:

A hot oil edge injection system for an aluminum rolling mill, comprising at least an oil supply circuit and a lubricating oil tank, and is characterized in that: it also includes:

The hot oil tank is connected with the oil supply circuit and the lubricating oil tank;

The pump oil part, the oil inlet hole of the pump oil part is connected with the oil outlet hole of the hot oil tank;

The pressure regulating part, one end of the pressure regulating part is connected with the oil outlet hole of the pump oil part, and the other end is connected with the lower part of the hot oil tank;

The injection part, the oil inlet hole of the injection part communicates with the oil outlet hole of the pump oil part.

There is a liquid level gauge outside the hot oil tank, a liquid level relay is detachably connected to the liquid level gauge, and the outer wall surface of the hot oil tank is respectively provided with a first oil inlet hole, a second oil inlet hole and a first oil outlet hole and a second oil outlet hole, the hot oil tank is detachably connected with a hot oil part, the oil supply circuit passes through the first oil inlet hole and communicates with the oil inlet hole of the hot oil part, and the hot oil part is connected with the oil supply A refueling valve is communicated between the circuits, and the refueling valve is located outside the hot oil tank. A first temperature sensor and a supplementary heater are detachably connected in the hot oil tank, and the supplementary heater oil outlet hole passes through the first oil outlet hole and is connected to The oil inlet hole of the pump oil part is in communication, the second oil inlet hole is in communication with the lubricating oil tank, and the second oil inlet hole is in communication with the oil outlet hole of the pressure regulating part.

A motor is detachably connected to the outside of the top of the hot oil tank, a stirring shaft is detachably connected to the driving end of the motor, and a stirring blade is detachably connected to the stirring shaft extending into the hot oil tank.

There are at least two liquid level relays, and the liquid level relays are detachably connected to the side wall of the liquid level gauge sequentially from top to bottom.

The oil pump part is composed of at least two hot oil pumps, and the oil inlet holes of the hot oil pumps are all communicated with the oil outlet holes of the supplementary heater, and the oil outlet holes of the hot oil pump are all communicated with the oil inlet holes of the pressure regulating part.

The hot oil part is composed of at least two heaters, and the oil inlet holes of the heaters are all communicated with the oil outlet holes of the pressure regulating part and the oil supply circuit.

The pressure regulating part is composed of a second temperature sensor, a pressure sensor and a pressure regulating valve. The second temperature sensor and the pressure sensor are connected in series to the oil outlet hole of the pump oil part. The oil inlet end of the pressure regulating valve is connected to the pressure sensor. The feedback end is connected with the oil outlet hole of the pump oil part in sequence, and the oil outlet hole of the pressure regulating valve is communicated with the oil inlet hole of the hot oil part through the second oil inlet hole.

The injection part is composed of an injection valve, an upper work roll hot oil injection beam, a lower work roll hot oil injection beam and two pairs of nozzle groups. The oil inlet hole of the injection valve is communicated with the oil outlet hole of the pump oil part. The nozzle groups are detachably connected to the same side of the hot oil spray beam of the upper work roll and the hot oil spray beam of the lower work roll, and the nozzle groups are located at both ends of the hot oil spray beam of the upper work roll and the hot oil spray beam of the lower work roll. The oil inlet holes of the nozzle are all communicated with the oil outlet holes of the injection valve.

The nozzle group consists of at least two nozzles.

The beneficial effect of the invention is that the temperature and pressure of the hot oil edge injection system can be kept constant, and further, during the rolling process, the edge of the work roll can be stably heated, thereby solving the problem of excessive heat dissipation caused by the edge of the work roll. The problem that the thermal crown of the edge of the work roll is different from the thermal crown of the middle of the work roll, and then the shape of the strip is improved.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the nozzle group of the present invention.

In the figure: 1- oil supply circuit; 2- lubricating oil tank; 3- hot oil tank; 4- liquid level gauge; 41- liquid level relay; 5- filling valve; 6- first temperature sensor; 7- supplementary heater; 8 - Motor; 9 - Stirring shaft; 10 - Stirring blade; 11 - Hot oil pump; 12 - Heater; 13 - Pressure sensor; 14 - Pressure regulating valve; 15 - Injection valve; - Lower work roll hot oil spray beam; 18 - Nozzle; 19 - Second temperature sensor.

Detailed ways

Embodiment 1:

Referring to FIG. 1, it is a schematic structural diagram of Embodiment 1 of the present invention, a hot oil edge injection system of an aluminum rolling mill, at least including an oil supply circuit 1 and a lubricating oil tank 2, and also includes:

The hot oil tank 3 is in communication with the oil supply circuit 1 and the lubricating oil tank 2;

The pump oil part, the oil inlet hole of the pump oil part is connected with the oil outlet hole of the hot oil tank 3;

The pressure regulating part, one end of the pressure regulating part is connected with the oil outlet hole of the pump oil part, and the other end is connected with the lower part of the hot oil tank;

The injection part, the oil inlet hole of the injection part communicates with the oil outlet hole of the pump oil part.

In actual use: the oil supply circuit 1 supplies oil to the hot oil tank 3, and the oil is heated by the hot oil tank 3, and then the oil in the hot oil tank 3 is pumped out through the pump oil part, and then the output of the pump oil part is adjusted through the pressure regulating valve. The pressure of the oil hole, when the pressure of the oil outlet hole of the pump oil part is too high, the pressure regulating part will divert the oil from the oil outlet hole of the pump oil part. The spray part sprays the oil to the edge of the work roll, so that the thermal crown of the edge and the middle of the work roll is the same.

When there is too much oil in the hot oil tank 3, it will flow into the lubricating oil tank 2.

Embodiment 2:

On the basis of Example 1, referring to FIG. 1 : a liquid level gauge 4 is provided outside the hot oil tank 3 , a liquid level relay 41 is detachably connected to the liquid level gauge 4 , and the outer wall surface of the hot oil tank 3 is respectively provided with a liquid level gauge 4 . A first oil inlet hole, a second oil inlet hole, a first oil outlet hole and a second oil outlet hole, the hot oil tank 3 is detachably connected with a hot oil part, and the oil supply circuit 1 passes through the first oil inlet The hole is communicated with the oil inlet hole of the hot oil part, a refueling valve 5 is communicated between the hot oil part and the oil supply circuit 1, and the refueling valve is located outside the hot oil tank 3, and the hot oil tank 3 is detachably connected with a first A temperature sensor 6 and a supplementary heater 7, the oil outlet hole of the supplementary heater 7 communicates with the oil inlet hole of the pump oil part through the first oil outlet hole, the second oil inlet hole is communicated with the lubricating oil tank 2, and the first oil inlet hole is connected with the lubricating oil tank 2. The second oil inlet hole communicates with the oil outlet hole of the pressure regulating part.

In actual use: start the heating part, open the filling valve 5, the oil supply circuit 1 sends the oil to the oil inlet hole of the heating part in the hot oil tank 3, and then the heating part heats the oil in the oil supply circuit 1 and discharges it into the hot oil tank 3, at the same time, the oil level in the hot oil tank 3 is sensed through the liquid level relay 41 on the liquid level gauge 4. When the oil volume reaches the preset value, the filling valve 5 and the hot oil part are closed, and the oil in the hot oil tank 3 is stopped. and heating, when less than the preset value, open the filling valve 5 and the hot oil part to supply oil and heat the hot oil tank 3, and monitor the temperature of the oil in the hot oil tank 3 through the first temperature sensor 6. When the temperature When the sensor 5-1 detects that the temperature of the oil in the hot oil tank 1 is lower than the required temperature, increase the temperature of the oil injected by the hot oil part to meet the requirements, start the oil pump part, and the oil pump part will pass the oil in the hot oil tank 3 through the The supplementary heater 7 is drawn out, then discharged from the oil outlet hole of the pump oil part, and sent to the injection part. When the temperature is lower than the preset value, the supplementary heater 7 is started, and the oil entering the pump oil part is carried out through the supplementary heater 7. Secondary heating to ensure oil temperature.

In this embodiment, the model of the first temperature sensor 6 is ETS 388-5-150-Y00.

Embodiment 3:

On the basis of Example 1, referring to FIG. 1 : a motor 8 is detachably connected to the top of the hot oil tank 3, and a stirring shaft 9 is detachably connected to the driving end of the motor 8, and the stirring shaft 9 extends into the hot oil tank. The stirring blade 10 is detachably connected.

In actual use: when there is oil in the hot oil tank 3, start the motor 8, the driving end of the motor 8 drives the stirring shaft 9 and the stirring blade 10 to rotate, and the stirring blade 10 stirs the oil in the hot oil tank 3, so that the hot oil tank 3 Upper and lower oil temperatures are balanced.

Embodiment 4:

On the basis of Embodiment 1, referring to FIG. 1 , there are at least two liquid level relays 41 , and the liquid level relays 41 are detachably connected to the side wall of the liquid level gauge 4 sequentially from top to bottom.

In actual use: the amount of oil in the hot oil tank 3 can be accurately sensed through a plurality of liquid level relays 41 , and two pairs of liquid level relays 41 are used in this embodiment.

Example 5:

On the basis of Embodiment 1, referring to FIG. 1 , the oil pump section is composed of at least two hot oil pumps 11 , and the oil inlet holes of the hot oil pumps 11 are all connected with the oil outlet holes of the supplementary heater 7 , and the hot oil pump 11 outlet The oil holes are all communicated with the oil inlet holes of the pressure regulating part.

In actual use: at least two hot oil pumps 11 can ensure the oil pressure sent to the injection part to prevent the oil pressure from being too low to make the injection part spray oil onto the work rolls. A pair of hot oil pumps 11 is used in this embodiment.

Example 6:

On the basis of Embodiment 2, referring to FIG. 1 , the hot oil part is composed of at least two heaters 12 , and the oil inlet holes of the heaters 12 are all communicated with the oil outlet hole of the pressure regulating part and the oil supply circuit.

In actual use: at least two heaters 12 can improve the heating efficiency of the oil fed into the hot oil tank 3 by the oil supply circuit 1 . In this embodiment, two heaters 12 are used.

Example 7:

On the basis of Embodiment 2, referring to FIG. 1 , the pressure regulating part is composed of a second temperature sensor 19 , a pressure sensor 13 and a pressure regulating valve 14 . The second temperature sensor 19 and the pressure sensor 13 are connected in series to the pump oil in sequence. The oil inlet end and the pressure sensing feedback end of the pressure regulating valve 14 are sequentially connected with the oil outlet hole of the pump oil part, and the oil outlet hole of the pressure regulating valve 14 passes through the second oil inlet hole and the hot oil inlet hole. The oil hole is connected.

In actual use: when the pump oil part sends the oil into the injection part, the temperature of the oil outlet hole of the pump oil part is monitored by the second temperature sensor 19. If it is lower than the preset value, the second temperature sensor 19 is triggered and turned on at the same time. The supplementary heater 7 is used to reheat the oil passing through the supplementary heater 7. The second temperature sensor 5-2 is used to confirm the temperature of the oil in the pipeline to determine the heating effect of the supplementary heater 3. According to the temperature sensor 5-2 The temperature value of 2 adjusts the heating power in real time to achieve a constant temperature of the output oil. The pressure sensor 13 monitors the oil pressure of the oil outlet of the pump oil part. When it is higher than the preset value, the pressure regulating valve 14 is opened, and the pump oil part is The oil coming out of the oil outlet is divided, and the divided oil enters the hot oil tank 3 through the pressure regulating valve 14. According to the pressure value monitored by the pressure sensor 13, the opening angle of the pressure regulating valve 14 is controlled. When the pressure sensor 13 monitors that the deviation between the pressure value in the pipe and the set value is large, the opening of the pressure regulating valve is large, and the smaller the deviation, the smaller the opening of the pressure regulating valve. To achieve the stability of oil pressure in the pipeline.

In this embodiment, the pressure sensor 13 adopts the model MPM483-12(0-1.6)MPaE22M3PC3iG.

In this embodiment, the second temperature sensor 19 adopts the model ETS 388-5-150-Y00.

Example 8:

On the basis of Embodiment 1, referring to Figures 1 and 2: the injection part is composed of injection valve 15, upper work roll hot oil injection beam 16, lower work roll hot oil injection beam 17 and two pairs of nozzle groups 18, so The oil inlet hole of the injection valve 15 is communicated with the oil outlet hole of the pump oil part, and each pair of the nozzle groups 18 is detachably connected to the same side of the upper work roll hot oil injection beam 16 and the lower work roll hot oil injection beam 17 respectively, and The nozzle groups 18 are located at both ends of the upper work roll hot oil spray beam 16 and the lower work roll hot oil spray beam 17 , and the oil inlet holes of the nozzles 18 are all communicated with the oil outlet holes of the injection valve 15 .

In actual use: the injection valve 10 is used to control the on-off of the oil, the hot oil injection beam 12 of the upper work roll and the hot oil injection beam 13 of the lower work roll are used to connect the nozzle 18, and the nozzle 18 sprays hot oil to the edge of the roll. In the embodiment, the nozzle 18 has the function of opening and closing. According to the width of the strip, the nozzle 18 to be opened and closed is different to ensure that the hot oil is always sprayed on the edge of the strip width on the work roll.

Example 9:

On the basis of Embodiment 8, referring to FIG. 2 : the nozzle group 18 is composed of at least two nozzles.

In actual use: the adjacent nozzle spacing between each pair of nozzle groups 18 is the same as that of the narrowest rolled strip, and the nozzle spacing of each pair of nozzle groups 18 located outside the hot oil spray beam of the work roll is greater than that of the rolled widest strip.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made within the scope of knowledge possessed by those of ordinary skill in the art without departing from the purpose of the present invention. Various variations are within the scope of this technology. Components and structures not described in detail in this embodiment belong to well-known components and common structures or common means in the industry, and will not be described one by one here.

Claims (9)

1. A hot oil edge injection system of an aluminum rolling mill, comprising at least an oil supply circuit (1) and a lubricating oil tank (2), characterized in that: also comprising: The hot oil tank (3) is communicated with the oil supply circuit (1) and the lubricating oil tank (2); The pump oil part, the oil inlet hole of the pump oil part is connected with the oil outlet hole of the hot oil tank (3); The pressure regulating part, one end of the pressure regulating part is connected with the oil outlet hole of the pump oil part, and the other end is connected with the lower part of the hot oil tank; In the injection part, the oil inlet hole of the injection part communicates with the oil outlet hole of the pump oil part. 2 . The hot oil edge injection system of an aluminum rolling mill according to claim 1 , wherein the hot oil tank ( 3 ) is provided with a liquid level gauge ( 4 ) outside the liquid level gauge ( 4 ). 3 . A liquid level relay (41) is detachably connected, and a first oil inlet hole, a second oil inlet hole, a first oil outlet hole and a second oil outlet hole are respectively opened on the outer wall surface of the hot oil tank (3). A hot oil part is detachably connected in the oil tank (3), the oil supply circuit (1) communicates with the oil inlet hole of the hot oil part through the first oil inlet hole, and the hot oil part is connected with the oil supply circuit (1) A fueling valve (5) is communicated therebetween, and the fueling valve is located outside the hot fuel tank (3), and a first temperature sensor (6) and a supplementary heater (7) are detachably connected in the hot fuel tank (3). The oil outlet hole of the supplementary heater (7) is communicated with the oil inlet hole of the pump oil part through the first oil outlet hole, the second oil inlet hole is communicated with the lubricating oil tank (2), and the second oil inlet hole is connected with the pressure regulator The oil outlet hole is connected. 3. The hot oil edge injection system of an aluminum rolling mill according to claim 2, characterized in that: a motor (8) is detachably connected to the top of the hot oil tank (3), and the motor (8) drives the A stirring shaft (9) is detachably connected to the end, and the stirring shaft (9) extends into the hot oil tank and is detachably connected with a stirring blade (10). 4 . The hot oil edge injection system of an aluminum rolling mill according to claim 2 , characterized in that: there are at least two liquid level relays ( 41 ), and the liquid level relays ( 41 ) are arranged in order from top to bottom. 5 . Removably connected to the side wall of the liquid level gauge (4). 5 . The hot oil edge injection system of an aluminum rolling mill according to claim 2 , wherein the oil pump is composed of at least two hot oil pumps ( 11 ), and the hot oil pump ( 11 ) has an oil inlet hole. 6 . They are all communicated with the oil outlet holes of the supplementary heater (7), and the oil outlet holes of the hot oil pump (11) are all communicated with the oil inlet holes of the pressure regulating part. 6 . The hot oil edge injection system of an aluminum rolling mill according to claim 2 , wherein the hot oil portion is composed of at least two heaters ( 12 ), and the heaters ( 12 ) feed oil. 7 . The holes are all communicated with the oil outlet hole of the pressure regulating part and the oil supply circuit (1). 7 . The hot oil edge injection system of an aluminum rolling mill according to claim 2 , wherein the pressure regulating part is composed of a second temperature sensor ( 19 ), a pressure sensor ( 13 ) and a pressure regulating valve ( 14 ). 8 . ), the second temperature sensor (19) and the pressure sensor (13) are connected in series to the oil outlet hole of the pump oil part, and the oil inlet end and the pressure sensing feedback end of the pressure regulating valve (14) are connected to the pump oil part in turn. The oil outlet hole of the pressure regulating valve (14) communicates with the oil inlet hole of the hot oil part through the second oil inlet hole. 8 . The hot oil edge injection system of an aluminum rolling mill according to claim 1 , wherein the injection part consists of an injection valve (15), an upper work roll hot oil injection beam (16) and a lower work roll. 9 . The hot oil injection beam (17) and two pairs of nozzle groups (18) are formed, the oil inlet hole of the injection valve (15) is communicated with the oil outlet hole of the pump oil part, and each pair of the nozzle groups (18) is detachably connected to the The upper work roll hot oil spray beam (16) and the lower work roll hot oil spray beam (17) are on the same side, and the nozzle group (18) is located on the upper work roll hot oil spray beam (16) and the lower work roll hot oil spray beam (17) (17) At both ends, the oil inlet hole of the nozzle (18) is connected with the oil outlet hole of the injection valve (15). 9 . The hot oil edge injection system of an aluminum rolling mill according to claim 8 , wherein the nozzle group ( 18 ) consists of at least two nozzles. 10 .