Blast furnace feeding automatic control and anti-blocking structure

Abstract

The utility model discloses a blast furnace feeding automatic control and anti-blocking structure which comprises a blast furnace body, a feeding structure is arranged at the upper end of the blast furnace body, and the feeding structure comprises a lower sealing valve, a material flow adjusting valve, a material tank, an upper sealing valve, a material blocking valve and a material receiving hopper; the utility model relates to the technical field of blast furnace feeding, in particular to a feeding structure of a blast furnace, which is characterized in that a lower sealing valve, a material flow regulating valve, an upper sealing valve and a material blocking valve are matched to automatically detect a material shortage line and automatically open the material blocking valve in advance under the condition that materials are fast and cannot be supplied, so that the charging time is greatly shortened, the feeding speed is increased, and the production efficiency is improved. Meanwhile, when the stockline meets the set requirement, the material tank is not empty and the material receiving hopper is not full and the third vehicle needs to be loaded, the automatic control system automatically quits the material blocking advance opening mode, feeding is conducted according to the normal mode, the material conveying effect in the material pipe can be fully guaranteed through the arranged anti-blocking structure, and the situation that materials are accumulated in the material tank is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a blast furnace feeding technology field, concretely is a blast furnace feeding automatic control and prevent blocking structure. BACKGROUND

[0002] Ironmaking production process is the process that blast furnace raw materials carry out a series of complex reduction reactions in blast furnace, the specific process is as follows: the cold wind from the air blower is heated after hot blast stove, forms high-temperature hot blast and blows into from blast furnace tuyere, and hot gas stream produced by coke combustion moves from below to above, and the blast furnace raw materials are loaded from the top of the furnace and move from top to bottom, the blast furnace charge and high-temperature hot blast contact each other to exchange heat, gradually reduce, and finally reduce the blast furnace raw materials into pig iron in the lower part of the furnace, and form slag at the same time;

[0003] Blast furnace distribution usually refers to that the material in the blast furnace tank is scattered on different positions of the blast furnace material surface according to certain rules by the rotary chute, and the distribution mode of the blast furnace top equipment is edited by manual on the computer picture, the data is checked, and the system is executed after confirming that the data is correct, with the continuous improvement of the development of blast furnace, high air pressure, high oxygen enrichment, large batch of ore and other new challenges are brought to the production of blast furnace, and the smooth and stable operation of blast furnace is affected by the insufficient material supply of the material line, unstable material line, inaccurate distribution and other factors, and the smelting effect and hot metal yield are also affected, and the material is prone to accumulate in the tank, and the conveying effect of the material cannot be guaranteed, in view of this, for the above problems, there may be technical means to solve in the prior art, but the present case wants to provide an alternative or replacement technical scheme. CONTENT OF THE UTILITY MODEL

[0004] In order to realize the above object, the utility model realizes through the following technical scheme: a blast furnace feeding automatic control and anti-blocking structure, including blast furnace body, the inlet structure is equipped on the upper end of blast furnace body, the inlet structure includes: lower sealing valve, material flow regulating valve, tank, upper sealing valve, material blocking valve and material collecting hopper;

[0005] The lower sealing valve is installed on the upper end of the blast furnace body, the material flow regulating valve is installed on the upper end of the lower sealing valve, the tank is located on the upper end of the material flow regulating valve, the upper sealing valve is installed on the upper end of the tank, the material blocking valve is located on the upper end of the upper sealing valve, and the material collecting hopper is installed on the upper end of the material blocking valve.

[0006] Preferably, the tank is provided with an anti-blocking structure, and the anti-blocking structure comprises three sliding rails, a pushing frame, a connecting frame, a gear ring, two driving shafts, two gears and a driving assembly.

[0007] Three slide rails are mounted on the inner wall of the material tank, the stirring frame is movably embedded in the three slide rails and is attached to the inner wall of the material tank, the connecting frame is fixedly mounted on the upper end of the stirring frame, the gear ring is fixedly mounted on the outer side of the connecting frame, two drive shafts are movably embedded on the upper wall of the material tank, two gears are mounted on the bottom ends of the two drive shafts and are engaged with the two sides of the gear ring respectively, and the drive assembly is fixedly mounted on the two sides of the upper end of the material tank and is connected with the two drive shafts.

[0008] Preferably, the drive assembly comprises two motors, two worms and two worm gears.

[0009] The two motors are mounted on the two sides of the upper end of the material tank, one end of each of the two worms is connected with the driving end of each of the two motors, the two worm gears are mounted on the upper ends of the two drive shafts and are engaged with the two worms respectively.

[0010] Preferably, a sealing bearing is arranged at the connection between the drive shaft and the material tank.

[0011] Preferably, a sliding groove is formed on the outer wall of the stirring frame.

[0012] Preferably, the slide rail is a ring-shaped slide rail.

[0013] Beneficial effects

[0014] The utility model provides a kind of high furnace feeding automatic control and anti-blocking structure, with following beneficial effects: the material inlet structure of the case, by the cooperation of the lower sealing valve, material flow regulating valve, upper sealing valve and material blocking valve, can automatically detect the state of material shortage line and fast supply, automatically input material blocking valve early opening mode, substantially shorten charging time, speed up the feeding speed, stabilize the depth of blast furnace material line, when material line reaches the set requirement, and the tank is not empty, the material collecting hopper is not full, and the third vehicle is loaded again, the automatic control system automatically exits the material blocking early opening mode, and loads according to normal mode, and by the setting of anti-blocking structure, the material conveying effect in material pipe can be fully guaranteed, and material accumulation in tank is effectively avoided. ACCOUT OF DRAWINGS

[0015] Fig. 1 It is a front view of the high furnace feeding automatic control and anti-blocking structure.

[0016] Fig. 2 It is a front view of the high furnace feeding automatic control and anti-blocking structure.

[0017] Fig. 3 It is an enlarged structure diagram of "A" of the high furnace feeding automatic control and anti-blocking structure.

[0018] In the figure: 1, blast furnace body, 2, lower sealing valve, 3, material flow regulating valve, 4, material tank, 5, upper sealing valve, 6, material blocking valve, 7, material collecting hopper, 8, slide rail, 9, push frame, 10, connecting frame, 11, gear ring, 12, drive shaft, 13, gear, 14, motor, 15, worm, 16, worm gear, 17, sealing bearing. DETAILED DESCRIPTION

[0019] Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of the utility model protection.

[0020] Embodiment: please refer to Figs. 1-3 A blast furnace feeding automatic control and anti-blocking structure, including blast furnace body 1, blast furnace body 1 upper end is equipped with material inlet structure, material inlet structure includes: lower sealing valve 2, material flow regulating valve 3, material tank 4, upper sealing valve 5, material blocking valve 6 and material collecting hopper 7;

[0021] Lower sealing valve 2 is installed on the upper end of blast furnace body 1, material flow regulating valve 3 is installed on the upper end of lower sealing valve 2, material tank 4 is located on the upper end of material flow regulating valve 3, upper sealing valve 5 is installed on the upper end of material tank 4, material blocking valve 6 is located on the upper end of upper sealing valve 5, and material collecting hopper 7 is installed on the upper end of material blocking valve 6.

[0022] In use, the logic program of the furnace charging automatic control system PLC has an intelligent charging switch in the host computer picture. The intelligent charging control system intelligently judges the advanced opening of the blast furnace top damper 6 and the exit of the advanced opening of the blast furnace top damper 6. The host computer picture also has a button for manually inputting the advanced opening of the blast furnace top damper 6 and automatically exiting the advanced opening of the blast furnace top damper 6. The advanced opening mode of the blast furnace top damper 6 is based on multiple conditions in the blast furnace top charging. When the blast furnace stock line is lower than the set value, the blast furnace stock tank 4 is empty, the blast furnace stock tank 4 is empty and the gas dispersion recovery is completed, the upper sealing valve 5 is opened to the position, the blast furnace stock hopper 7 is charging and has charged two cars of sinter in waiting for the third car of sinter, and the charging car is full of sinter in the pit and starts to load, the damper 6 of the stock hopper 7 is opened, the two cars of sinter in the stock hopper 7 enter the stock tank 4, and the third car of sinter is being transported to the blast furnace top stock hopper 7. This time period can completely make the two cars of sinter in the stock hopper 7 enter the stock tank 4. When the third car of sinter is poured into the blast furnace top stock hopper 7, the stock hopper 7 displays a full signal state and starts to count and close the damper 6. The third car of sinter directly enters the stock tank 4 through the stock hopper 7. The counting time is up and the stock hopper 7 is empty. The damper 6 is closed, the upper sealing valve 5 is closed, and the blast furnace stock tank 4 is charged and enters the next procedure. At the same time, the stock hopper 7 enters the standby charging again. The exit mode of the blast furnace top damper 6 is based on multiple conditions in the blast furnace top charging. When the blast furnace stock line is higher than the set value, the blast furnace stock tank 4 is full, the blast furnace stock hopper 7 is charging and has charged two cars of sinter in waiting for the third car of sinter, and the charging car is full of sinter in the pit and starts to load, the automatic control system automatically exits the advanced opening mode of the damper 6, normally transports the third car of sinter to the top of the blast furnace, and the stock hopper 7 is full when the third car of sinter is transported to the stock hopper 7. At this time, if the blast furnace stock tank 4 is empty and the blast furnace stock tank 4 is empty and the gas dispersion recovery is completed, the damper 6 and the upper sealing valve 5 are opened, the normal counting is ensured, the three cars of sinter in the stock hopper 7 are completely charged into the blast furnace stock tank 4, the normal counting time is up, the damper 6 and the upper sealing valve 5 are closed, the blast furnace stock tank 4 is charged and enters the next procedure. At the same time, the stock hopper 7 enters the standby charging again.

[0023] In the specific implementation process, the stock tank 4 is provided with a blocking prevention structure. The blocking prevention structure comprises three sliding rails 8, a pushing frame 9, a connecting frame 10, a gear ring 11, two driving shafts 12, two gear wheels 13 and a driving assembly.

[0024] The three sliding rails 8 are installed on the inner wall of the stock tank 4. The pushing frame 9 is movably embedded in the three sliding rails 8 and is in close contact with the inner wall of the stock tank 4. The connecting frame 10 is fixedly installed on the upper end of the pushing frame 9. The gear ring 11 is fixedly installed on the outer side of the connecting frame 10. The two driving shafts 12 are movably embedded in the upper wall of the stock tank 4 on both sides. The two gear wheels 13 are installed on the bottom ends of the two driving shafts 12 and are in mesh with the two sides of the gear ring 11, respectively. The driving assembly is fixedly installed on the upper end of the stock tank 4 on both sides and is connected with the two driving shafts 12.

[0025] When the material is fed, the driving assembly works, under the cooperation of the driving assembly and the driving shaft 12, so that the two driving shafts 12 and the two gears 13 rotate and cooperate with the gear ring 11 on the upper end of the connecting frame 10, so that the connecting frame 10 and the stirring frame 9 rotate inside the three slide rails 8, under the rotating action of the stirring frame 9 in the tank 4, the material in the tank 4 can be stirred, which can effectively avoid the accumulation of the material in the tank 4 and ensure the overall feeding effect of the material.

[0026] In the specific implementation process, the driving assembly comprises two motors 14, two worms 15 and two worm gears 16.

[0027] The two motors 14 are respectively installed on the upper end of the two sides of the tank 4, one end of the two worms 15 is respectively connected with the driving end of the two motors 14, and the two worm gears 16 are respectively installed on the upper end of the two driving shafts 12 and are respectively engaged with the two worms 15.

[0028] When the stirring frame 9 is driven, the two motors 14 are simultaneously driven to work by the motor 14 synchronizer, under the cooperation of the two motors 14 and the worm 15, so that the turbine on the upper end of the driving shaft 12 rotates, and the driving mode of the worm 15 and the worm gear 16 can effectively increase the rotation degree of the stirring frame 9 while reducing the rotation speed, which can ensure the stirring effect of the material while avoiding causing a large amount of damage to the material.

[0029] In the specific implementation process, the driving shaft 12 is provided with a sealing bearing 17 at the connection with the tank 4.

[0030] In the specific implementation process, a chute is processed on the outer wall of the stirring frame 9.

[0031] In the specific implementation process, the slide rail 8 is a ring-shaped slide rail 8.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic control and anti-blocking structure for blast furnace charging, comprising a blast furnace body (1), characterized in that, The upper end of the blast furnace body (1) is provided with a feeding structure, which includes: a lower sealing valve (2), a material flow regulating valve (3), a material tank (4), an upper sealing valve (5), a material blocking valve (6), and a material receiving hopper (7); The lower sealing valve (2) is installed on the upper end of the blast furnace body (1), the material flow regulating valve (3) is installed on the upper end of the lower sealing valve (2), the material tank (4) is located on the upper end of the material flow regulating valve (3), the upper sealing valve (5) is installed on the upper end of the material tank (4), the material blocking valve (6) is located on the upper end of the upper sealing valve (5), and the material receiving hopper (7) is installed on the upper end of the material blocking valve (6).

2. The automatic control and anti-blocking structure for blast furnace charging according to claim 1, characterized in that, The material tank (4) is equipped with an anti-blocking structure, which includes: three slide rails (8), a toggle frame (9), a connecting frame (10), a gear ring (11), two drive shafts (12), two gears (13), and a drive assembly. All three slide rails (8) are installed on the inner wall of the material tank (4). The actuating frame (9) is movably embedded in the three slide rails (8) and fits against the inner wall of the material tank (4). The connecting frame (10) is fixedly installed on the upper end of the actuating frame (9). The gear ring (11) is fixedly installed on the outer side of the connecting frame (10). The two drive shafts (12) are movably embedded on both sides of the upper wall of the material tank (4). The two gears (13) are respectively installed on the bottom ends of the two drive shafts (12) and mesh with both sides of the gear ring (11). The drive assembly is fixedly installed on both sides of the upper end of the material tank (4) and connected to the two drive shafts (12).

3. The automatic control and anti-blocking structure for blast furnace charging according to claim 2, characterized in that, The drive assembly includes: two motors (14), two worm gears (15), and two worm wheels (16); The two motors (14) are respectively installed on both sides of the upper end of the material tank (4), one end of the two worms (15) is respectively connected to the driving end of the two motors (14), and the two worm wheels (16) are respectively installed on the upper end of the two drive shafts (12) and respectively mesh with the two worms (15).

4. The automatic control and anti-blocking structure for blast furnace charging according to claim 2, characterized in that, A sealed bearing (17) is provided at the connection between the drive shaft (12) and the material tank (4).

5. The automatic control and anti-blocking structure for blast furnace charging according to claim 2, characterized in that, The outer wall of the actuating frame (9) is machined with a groove.

6. The automatic control and anti-blocking structure for blast furnace charging according to claim 2, characterized in that, The slide rail (8) is a ring slide rail (8).

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