Secondary self-cleaning system for lump ore bin of blast furnace

Abstract

The utility model discloses a secondary self-cleaning system for a lump ore bin of a blast furnace. The secondary self-cleaning system comprises a primary self-cleaning system and a secondary self-cleaning system, the first-stage self-cleaning system comprises a material blocking sensor and a bottom bin vibrator, the material blocking sensor is installed at the position close to a discharging port of the bin bottom, the bottom bin vibrator is installed in the middle of the outer side surface of the bin bottom, and the material blocking sensor is electrically connected with the bottom bin vibrator; the secondary self-cleaning system comprises a warning hole, a limiting monitor and an air cannon, the warning hole is a through hole penetrating through the inner side and the outer side of the bin bottom, the limiting monitor is fixed to the outer side of the bottom bin through the warning hole, and the air cannon is installed at the top of the bottom bin; the limiting monitor and the material blocking sensor are both electrically connected with the air cannon, and the limiting monitor is further externally connected with an alarm. By means of the mode, the feeding tension of the blast furnace can be prevented, the labor intensity of workers is reduced, and the operation stability of the blast furnace is improved.

Description

Technical Field

[0001] The utility model relates to the field of blast furnace charging, in particular to a secondary self-cleaning system for a blast furnace block ore bin. Background Art

[0002] The blast furnace block ore bin is a device specially used to charge the blast furnace. When the materials are piled up outside, they generally absorb moisture from the environment. Therefore, when they are loaded into the block ore bin, wet materials are easily accumulated at the bottom of the bin, causing sticking of the materials. The materials are not easy to slide out from the discharge port, and then blocked at the discharge port, resulting in smaller bin capacity and poor material discharge, causing tight supply of the blast furnace and insufficient furnace temperature. Therefore, special personnel must be required to clean it regularly. The cleaning work is labor-intensive and time-consuming, which is not only not conducive to safe operation, but also requires shutdown when necessary, which will cause the production line to stagnate and cause huge losses. Utility Model Content

[0003] The technical problem mainly solved by the utility model is to provide a two-level self-cleaning system for a ore bin, which can improve the efficiency of automatic unblocking of blockages, reduce the labor intensity of on-site personnel, and improve the stability of material feeding.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a two-level self-cleaning system for a blast furnace block ore bin, the bottom of the blast furnace block ore bin is in the shape of a conical platform, the lower bottom surface of the conical platform is provided with a discharge port, and the two-level self-cleaning system for the blast furnace block ore bin comprises: a primary self-cleaning system and a secondary self-cleaning system; the primary self-cleaning system comprises a blocking sensor and a bottom bin vibrator, the blocking sensor is installed at a position close to the discharge port on the inner side of the bin bottom, the bottom bin vibrator is installed at a middle position on the outer side surface of the bin bottom, and the blocking sensor is electrically connected to the bottom bin vibrator; the secondary self-cleaning system comprises a warning hole, a limit monitor and an air cannon, the warning hole is arranged on a preset warning line on the bottom bin, the warning hole is a through hole penetrating the inner and outer sides of the bin bottom, the limit monitor is fixed on the outer side of the bottom bin relying on the warning hole, the air cannon is installed on the top of the bottom bin, and the muzzle is tilted downward, the limit monitor and the blocking sensor are both electrically connected to the air cannon, and the limit monitor is also externally connected to an alarm.

[0005] In a preferred embodiment of the present invention, the material blocking sensor is a pressure plate type sensor.

[0006] In a preferred embodiment of the present invention, the bottom bin vibrator is an oscillation motor.

[0007] In a preferred embodiment of the utility model, the limit monitor includes a shell, a sealing plug, a support plate, a spring, a pressure column, a switch touch plate and a switch seat. The opening of the warning hole is smaller than the opening of the shell. When the shell is fixed, the shell opening completely covers the opening of the warning hole. The support plate is installed inside the shell. The support plate is smaller than the opening of the shell and larger than the opening of the warning hole. The pressure column is arranged on the outside of the support plate. The sealing plug is arranged on the inside of the support plate. The sealing plug is closely matched with the size of the opening of the warning hole. A spring is installed between the support plate and the bottom of the shell. When the spring presses the support plate onto the outer surface of the bottom of the warehouse, the sealing plug extends into the warning hole. The switch seat is also fixed on the bottom plate of the shell. The switch touch plate is installed on the switch seat. The switch touch plate is colinear with the center line of the pressure column. The sealing plug is a silicone rubber sealing plug. The thickness of the sealing plug is not greater than the length of the warning hole and is greater than the limit stroke of the top of the pressure column contacting the switch touch plate. The spring is a cylindrical spring, and the pressure column and the switch seat are respectively inserted into the two ends of the cylindrical spring.

[0008] In a preferred embodiment of the utility model, the working mode of the secondary self-cleaning system is as follows: when the blocking sensor senses that the discharge port is blocked, it automatically sends a start signal to the bottom bin vibrator to start the bottom bin vibrator; when the blockage is over, it automatically sends a shut-down signal to the bottom bin vibrator; when the bottom bin vibrator is already turned on, if the limit monitor senses that the material has reached a preset warning line, it automatically sends a start signal to the air cannon; when the blocking sensor senses that the blockage has disappeared, it automatically sends a shut-down signal to the air cannon and the bottom bin vibrator at the same time; if the material does not drop after the air cannon is started for a preset time, an alarm signal is automatically sent out.

[0009] The beneficial effects of the utility model are as follows: the utility model optimizes and transforms the existing ore bin cleaning system to achieve two-level continuous cleaning of the block bin bottom, thereby effectively solving the material blockage problem, preventing blast furnace material supply shortage, significantly reducing the frequency of manual processing, reducing personnel labor intensity, and improving the stability of blast furnace operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the internal structure of a preferred embodiment of the utility model;

[0011] Figure 2 Schematic diagram of the structure principle of the limit alarm box in the illustrated embodiment;

[0012] The markings of the components in the accompanying drawings are as follows:

[0013] 1. Bin bottom, 2. Air cannon, 3. Limit monitor, 4. Bin vibrator, 5. Blockage sensor, 6. Warning hole;

[0014] 301. Housing, 302. Sealing plug, 303. Support plate, 304. Pressure column, 305. Switch contact plate, 306. Spring, 307.

[0015] Switch holder. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0017] See also Figure 1 and Figure 2 , the utility model embodiment includes:

[0018] A two-level self-cleaning system for a blast furnace block ore bin, wherein the bin bottom 1 of the blast furnace block ore bin is in the shape of a conical platform, and a discharge port is arranged on the lower bottom surface of the conical platform, and the two-level self-cleaning system for the blast furnace block ore bin comprises: a primary self-cleaning system and a secondary self-cleaning system; the primary self-cleaning system comprises a blocking sensor 5 and a bottom bin vibrator 4, the blocking sensor 5 is installed at a position close to the discharge port on the inner side of the bin bottom 1, the bottom bin vibrator 4 is installed at a middle position on the outer surface of the bin bottom 1, and the blocking sensor 5 is electrically connected to the bottom bin vibrator 4; the secondary self-cleaning system comprises a warning hole 6, a limit monitor 3 and an air cannon 2, the warning hole 6 is arranged on a preset warning line on the bottom bin 1, the warning hole 6 is a through hole penetrating the inner and outer sides of the bottom bin 1, the limit monitor 3 is fixed on the outer side of the bottom bin 1 relying on the warning hole 6, the air cannon 2 is installed on the top of the bottom bin 1, and the muzzle is tilted downward, and the limit monitor 3 and the blocking sensor 5 are both electrically connected to the air cannon 2;

[0019] The blocking sensor 5 is a pressure plate type sensor, which is installed on the inner side of the bottom bin 1. When a blocking problem occurs, the mineral material will be quickly pressed on the pressure plate, and the blocking pressure will be sensed, thereby identifying the blocking fault quickly and accurately without error reporting.

[0020] The bottom bin vibrator 4 is an oscillating motor, which can periodically impact the outer wall of the bin bottom 1, promote the falling of the block material through vibration, and solve the blockage problem.

[0021] The limit monitor 3 includes a shell 301, a sealing plug 302, a support plate 303, a spring 306, a pressure column 304, a switch touch plate 305 and a switch seat 307. The opening of the warning hole 6 is smaller than the opening of the shell 301. When the shell 301 is fixed, the opening of the shell 301 completely covers the opening of the warning hole 6. The support plate 303 is installed inside the shell 301. The support plate 303 is smaller than the opening of the shell 301 and larger than the opening of the warning hole 6. The pressure column 304 is arranged on the outside of the support plate 303. The sealing plug 302 is arranged on the inner side of the support plate 303, the sealing plug 302 is closely matched with the hole size of the warning hole 6, a spring 306 is installed between the support plate 303 and the bottom of the shell 301, when the spring 306 presses the support plate 303 onto the outer surface of the warehouse bottom 1, the sealing plug 302 extends into the warning hole 6, the switch seat 307 is also fixed on the bottom plate of the shell 301, the switch touch plate 305 is installed on the switch seat 307, and the switch touch plate 305 is collinear with the center line of the pressure column 304.

[0022] The sealing plug 302 is a silicone rubber sealing plug. The silicone rubber sealing plug not only has a good sealing effect and can prevent ash from entering the gap, but also has good friction resistance and a long service life during use.

[0023] The thickness of the sealing plug 302 is not greater than the length of the warning hole 6, and is greater than the limit stroke of the top of the pressure column 304 contacting the switch contact plate 305. In this way, when the pressure column 304 hits the switch contact plate 305 to start the air cannon, the sealing plug 302 will not be separated from the warning hole 6, which can prevent ash from entering the housing 301 and affecting the signal accuracy.

[0024] The spring 306 is a cylindrical spring, and the pressure column 304 and the switch seat 307 are respectively inserted into the two ends of the cylindrical spring. In this way, the spring 306 can constrain the movement track of the pressure column 304, prevent deviation when subjected to force, and improve the accuracy of signal response.

[0025] When the blocking sensor 5 senses that the discharge port is blocked, it automatically sends a start signal to the bottom bin vibrator 4, and the bottom bin vibrator 4 vibrates the bottom bin 1 to promote discharge. When the blockage ends, it automatically sends a shutdown signal to the bottom bin vibrator 4 to stop vibration. When the bottom bin vibrator is turned on, if the limit monitor 3 senses that the material is blocked to the warning line, it automatically sends a start signal to the air cannon 2. When the blocking sensor 5 senses that the blockage disappears, it automatically sends a shutdown signal to the air cannon 2 and the bottom bin vibrator 4 at the same time. If the material does not drop within the preset time, the external alarm is controlled to automatically send an alarm signal. The alarm signal is generally a buzzer or a warning light. In this way, the two-stage cleaning of the oscillating motor and the air cannon 2 can effectively solve the problem of blocking, prevent the shortage of blast furnace supply, significantly reduce the frequency of manual processing, reduce the labor intensity of personnel, and improve the stability of operation.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A two-stage self-cleaning system for a blast furnace block ore bin, wherein the bottom of the blast furnace block ore bin is in the shape of a conical platform, and a discharge port is arranged on the lower bottom surface of the conical platform, characterized in that: The blast furnace block ore bin secondary cleaning system comprises: a primary self-cleaning system and a secondary self-cleaning system; The primary self-cleaning system includes a material blocking sensor and a bottom bin vibrator, wherein the material blocking sensor is installed at a position close to the discharge port on the inner side of the bin bottom, and the bottom bin vibrator is installed at a middle position on the outer side surface of the bin bottom, and the material blocking sensor is electrically connected to the bottom bin vibrator; The secondary self-cleaning system includes a warning hole, a limit monitor and an air cannon. The warning hole is arranged on a preset warning line on the bottom bin. The warning hole is a through hole that passes through both sides of the bottom of the bin. The limit monitor is fixed on the outside of the bottom bin relying on the warning hole. The air cannon is installed on the top of the bottom bin with the muzzle tilted downward. The limit monitor and the blockage sensor are electrically connected to the air cannon, and the limit monitor is also externally connected to an alarm.

2. The blast furnace block ore bin two-level self-cleaning system according to claim 1 is characterized in that: The material blocking sensor is a pressure plate type sensor.

3. The blast furnace block ore bin two-level self-cleaning system according to claim 1, characterized in that: The bottom bin vibrator is an oscillation motor.

4. The blast furnace block ore bin two-level self-cleaning system according to claim 1, characterized in that: The limit monitor includes a shell, a sealing plug, a support plate, a spring, a pressure column, a switch touch plate and a switch seat. The opening of the warning hole is smaller than the opening of the shell. When the shell is fixed, the shell opening completely covers the opening of the warning hole. The support plate is installed inside the shell. The support plate is smaller than the opening of the shell and larger than the opening of the warning hole. The pressure column is arranged on the outside of the support plate, and the sealing plug is arranged on the inside of the support plate. The sealing plug is tightly matched with the size of the opening of the warning hole. A spring is installed between the support plate and the bottom of the shell. When the spring presses the support plate onto the outer surface of the warehouse bottom, the sealing plug extends into the warning hole. The switch seat is also fixed on the bottom plate of the shell. The switch touch plate is installed on the switch seat. The switch touch plate is collinear with the center line of the pressure column.

5. The blast furnace block ore bin two-level self-cleaning system according to claim 4, characterized in that: The sealing plug is a silicone rubber sealing plug.

6. The blast furnace block ore bin two-level self-cleaning system according to claim 4, characterized in that: The thickness of the sealing plug is not greater than the length of the warning hole, and is greater than the limit stroke of the top end of the pressure column in contact with the switch touch plate.

7. The blast furnace block ore bin two-level self-cleaning system according to claim 4, characterized in that: The spring is a cylindrical spring, and the pressure column and the switch seat are respectively inserted into the two ends of the cylindrical spring.

8. The blast furnace block ore bin two-level self-cleaning system according to claim 1, characterized in that: The working mode of the secondary self-cleaning system is as follows: when the blocking sensor senses that the discharge port is blocked, it automatically sends a start signal to the bottom bin vibrator to start the bottom bin vibrator; when the blockage is over, it automatically sends a shut-down signal to the bottom bin vibrator; when the bottom bin vibrator is already turned on, if the limit monitor senses that the material has reached a preset warning line, it automatically sends a start signal to the air cannon; when the blocking sensor senses that the blockage disappears, it automatically sends a shut-down signal to the air cannon and the bottom bin vibrator at the same time; if the material does not drop after the preset time after the air cannon is started, an alarm signal is automatically sent out.

Images