Air supply device suitable for blast furnace coal injection pipeline
By designing the gas replenishment device for the sealing and filtering parts, the problems of easy blockage of the filter net and tempering of the coal spraying pipeline are solved, and reliable gas replenishment and safe operation of the blast furnace coal spraying pipeline are achieved.
Patent Information
- Application Number
- CN202421694250.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing blast furnace coal spraying pipeline gas replenishment equipment has the problem of equipment damage caused by the filter screen being easily blocked and the coal spraying pipeline fired during power outage, which affects the reliability and safety of coal spraying pipelines.
An air replenishment device including a sealing part, a butt part, an air pump and a filtering part is designed to control the opening and breaking of the passage through the sealing part to ensure the safety of the air pump, and keep it clean through the long filter of the filter part moving and avoid clogging of the filter.
The reliable operation of the coal spraying pipeline gas replenishment operation is achieved, and the coal spraying pipeline fires are avoided to damage the air pump, ensuring the smooth transmission of air flow and the cleaning of the filter, and improving the reliability and safety of the equipment.
Smart Images
Figure CN223163440U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an air supply device, in particular to a device capable of performing secondary pressurized air supply on a blast furnace coal injection pipeline, belonging to the technical field of air supply equipment for blast furnace coal injection pipelines. Background Art
[0002] The reaction in the blast furnace requires the participation of coal powder. The coal material ground into powder is transported to the blast furnace through the coal injection pipe; the coal powder is carried forward by the high-pressure airflow in the coal injection pipe; in actual production, in order to ensure the reliability of coal powder transportation during the injection process, a secondary pressurized air supply device is added to the path of the coal injection pipe, which injects high-pressure airflow into the coal injection pipe to ensure that the coal powder can move forward reliably; the current secondary pressurized air supply equipment is composed of a filter and an air pump, and the filtered air is pressurized by the air pump and injected into the coal injection pipe; this equipment has many disadvantages. First, impurities will accumulate on the filter after long-term use, and the impurities affect the working efficiency of the air pump. Secondly, when a power outage occurs during the blast furnace coal injection, the valve in the coal powder delivery pipe automatically closes, which will cause the pressure in the coal powder delivery pipe to become low, causing the blast furnace to temper and eventually lead to damage to the air supply equipment; therefore, a coal injection pipe air supply device that can operate reliably is needed. Utility Model Content
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an air supply device suitable for a coal injection pipeline of a blast furnace, which can ensure the reliable operation of the air supply operation of the coal injection pipeline.
[0004] The problem described in the present invention is solved by the following technical solutions:
[0005] A gas supply device suitable for a blast furnace coal injection pipeline comprises a sealing part, a docking part, an air pump and a filtering part; one end of the docking part is docked with the coal injection pipeline, and the other end of the docking part is connected to the air pump; the filtering part is connected to the air pump; the sealing part is arranged on the docking part; the docking part comprises a trumpet bucket, a cylinder, an annular sheet and a docking pipe; the end of the trumpet bucket with a larger diameter is arranged at one end of the cylinder, and the annular sheet is arranged at the other end of the cylinder; the end of the trumpet bucket with a smaller diameter is obliquely docked with the coal injection pipeline; the docking pipe is docked with the inner hole of the annular sheet, and the other end of the docking pipe is docked with the air outlet of the air pump.
[0006] The above-mentioned air replenishing device is suitable for the blast furnace coal injection pipeline, and the sealing part includes a cylinder, a slide and a sealing mechanism; the cylinder housing is arranged on the outer wall of the annular sheet; a square socket is provided on the annular sheet, and a sealing ring is provided on the inner wall of the square socket; the slide passes through the square socket of the annular sheet; the sealing mechanism is located in the cylinder and is connected to one end of the slide; the end of the cylinder piston rod is connected to one end of the slide, and the axis of the cylinder piston rod is parallel to the center line of the slide.
[0007] The air supplement device applicable to the pulverized coal injection pipeline of blast furnace, the sealing mechanism includes a sliding column, a connecting rod and a conical head; the sliding column is located inside the cylinder, and one end of the sliding column is connected to the end of the sliding plate away from the air cylinder; the connecting rod is arranged at the end of the sliding column away from the sliding plate; the center line of the connecting rod is parallel to the center line of the sliding plate; one end of the connecting rod is connected to the center of the end face of the conical head away from the pointed end; the axis line of the conical head is parallel to the center line of the sliding plate; the outer wall of the conical head is in close contact with the inner wall of the annular sheet, and a sealing ring is arranged on the inner wall of the annular sheet.
[0008] The air supplement device applicable to the pulverized coal injection pipeline of blast furnace, the filtering part includes a small square cylinder, a large square cylinder, a long filter screen and an electric cylinder; the small square cylinder is docked with the air inlet of the air pump; the large square cylinder is sleeved on the end of the small square cylinder away from the air pump, and the inner wall of the large square cylinder is in close contact with the outer wall of the small square cylinder; the end of the large square cylinder away from the air pump extends out of the small square cylinder; strip-shaped holes are arranged on both the top end face and the bottom end face of the large square cylinder, and the strip-shaped holes at the bottom are directly below the strip-shaped holes at the top. The strip-shaped holes are located on the part where the large square cylinder extends out of the small square cylinder, and the length of the strip-shaped holes is the same as the distance between the inner walls on both sides of the large square cylinder; the long filter screen passes through the strip-shaped holes on the top end face and the bottom end face of the large square cylinder, and the outer wall of the long filter screen is in close contact with the inner wall of the large square cylinder; the electric cylinder housing is arranged on the outer wall of the large square cylinder, and its piston rod faces downwards; a supporting plate is arranged at the end of the piston rod of the electric cylinder, and the top end face of the supporting plate is in contact with the bottom end face of the long filter screen.
[0009] The utility model conducts on-off processing on the channel between the air pump and the pulverized coal injection pipeline through the sealing part. When it is necessary to close the connection channel, the channel can be closed in time, avoiding the backfire of the pulverized coal injection pipeline from damaging the air pump; through the movement of the long filter screen in the filtering part, the filter screen part participating in the filtering operation is always kept clean, avoiding the blockage of the filter screen from affecting the transmission of air flow. Description of the Drawings
[0010] Figure 1 is a three-dimensional structural schematic diagram of the utility model in the use state;
[0011] Figure 2 is a three-dimensional structural schematic diagram inside the cylinder of the utility model.
[0012] The list of each label in the figure is as follows: 1. air pump, 2. horn hopper, 3. cylinder, 4. annular sheet, 5. docking pipe, 6. air cylinder, 7. sliding plate, 8. sliding column, 9. connecting rod, 10. conical head, 11. small square cylinder, 12. large square cylinder, 13. long filter screen, 14. electric cylinder. Detailed Embodiments
[0013] Refer to Figure 1And Figure 2 , the utility model comprises a sealing part, a docking part, an air pump 1 and a filtering part; one end of the docking part is docked with the pulverized coal injection pipeline, and the other end of the docking part is connected with the air pump 1; after the outside air is filtered by the filtering part, it passes through the air pump 1 and the docking part in sequence and then is injected into the pulverized coal injection pipeline, and the sealing part is used to control the on-off of the docking part; the filtering part is connected with the air pump 1; the sealing part is arranged on the docking part.
[0014] The docking part comprises a horn hopper 2, a cylinder 3, an annular piece 4 and a docking pipe 5; the end with a larger diameter of the horn hopper 2 is arranged at one end of the cylinder 3, and the annular piece 4 is arranged at the other end of the cylinder 3; the end with a smaller diameter of the horn hopper 2 is obliquely docked with the pulverized coal injection pipeline; the high-pressure air flow generated by the air pump 1 enters the pulverized coal injection pipeline through the horn hopper 2; the docking pipe 5 is docked with the inner hole of the annular piece 4, and the other end of the docking pipe 5 is docked with the air outlet hole of the air pump 1.
[0015] The sealing part comprises a cylinder 6, a sliding plate 7 and a sealing mechanism; the shell of the cylinder 6 is arranged on the outer wall of the annular piece 4; a square jack is arranged on the annular piece, and a sealing ring is arranged on the inner wall of the square jack; the sliding plate 7 passes through the square jack of the annular piece; the telescopic movement of the piston rod of the cylinder 6 drives the sliding of the sliding plate 7 synchronously, and further drives the sealing mechanism in the cylinder 3 to slide synchronously with the sliding of the sliding plate 7; the sealing mechanism is located in the cylinder 3 and is connected with one end of the sliding plate 7; the end of the piston rod of the cylinder 6 is connected with one end of the sliding plate 7, and the axis line of the piston rod of the cylinder 6 is parallel to the center line of the sliding plate 7.
[0016] The sealing mechanism comprises a sliding column 8, a connecting rod 9 and a conical head 10; the sliding column 8 is located in the cylinder 3, and one end of the sliding column 8 is connected with the end of the sliding plate 7 far away from the cylinder 6; the connecting rod 9 is arranged at the end of the sliding column 8 far away from the sliding plate 7; the center line of the connecting rod 9 is parallel to the center line of the sliding plate 7; one end of the connecting rod 9 is connected with the center of the end face of the conical head 10 far away from the pointed end; through the sliding column 8 and the connecting rod 9, the conical head 10 can move synchronously with the sliding of the sliding plate 7, and further realizes the control of the on-off of the inner hole channel of the annular piece; the axis line of the conical head 10 is parallel to the center line of the sliding plate 7; the outer wall of the conical head 10 is in close contact with the inner wall of the annular piece 4, and a sealing ring is arranged on the inner wall of the annular piece; when the conical head 10 presses against the annular piece 4, the channel is closed, and when the conical head 10 is away from the annular piece 4, the channel is opened.
[0017] The filtering part includes a small square cylinder 11, a large square cylinder 12, a long filter screen 13 and an electric cylinder 14; the small square cylinder 11 is docked with the air inlet of the air pump 1; the large square cylinder 12 is sleeved at one end of the small square cylinder 11 away from the air pump 1, and the inner wall of the large square cylinder 12 is in close contact with the outer wall of the small square cylinder 11; one end of the large square cylinder 12 away from the air pump 1 extends out of the small square cylinder 11, and the long filter screen 13 is located on the extended part of the large square cylinder 12. When the air passes through the long filter screen 13 area in the large square cylinder 12, it is filtered; strip-shaped holes are provided on both the top end face and the bottom end face of the large square cylinder 12, and the strip-shaped holes at the bottom are directly below the strip-shaped holes at the top. The strip-shaped holes are located on the part where the large square cylinder 12 extends out of the small square cylinder 11, and the length of the strip-shaped holes is the same as the distance between the inner walls on both sides of the large square cylinder 12; the long filter screen 13 passes through the strip-shaped holes on the top end face and the bottom end face of the large square cylinder 12, and the outer wall of the long filter screen 13 is in close contact with the inner wall of the large square cylinder 12; after the filter screen is used for a period of time, there will be impurities that affect the filtration. Therefore, the long filter screen 13 is driven to move, replacing the part of the filter screen that participates in the filtration, and the part of the filter screen that has not participated in the filtration replaces the part that has participated in the filtration; the housing of the electric cylinder 14 is arranged on the outer wall of the large square cylinder 12, and its piston rod faces downward; a tray is provided at the end of the piston rod of the electric cylinder 14, and the top end face of the tray is in contact with the bottom end face of the long filter screen 13; the electric cylinder 14 can drive the long filter screen 13 to move upward, so that the part of the filter screen that participates in the filtration is replaced, avoiding the adverse effects caused by the blockage of the filter screen due to long-term use.
[0018] Principle of use: In the normal state, the conical head 10 is away from the annular piece 4, so that the channel of the cylinder 3 is opened, and the air flow from the air pump 1 passes through the cylinder 3 and the horn 2 and enters the coal injection pipeline; when it is necessary to close the air supplement device channel in case of an emergency, the cylinder 6 is started to drive the slide plate 7 to slide, and then drive the conical head 10 to move forward to block the annular piece 4, thereby closing the channel between the coal injection pipeline and the air pump 1, and thus protecting the air pump 1.
[0019] During the operation of the air pump 1, the part of the long filter screen 13 surrounded by the large square cylinder 12 participates in the air filtration operation. After a long time, the filter screen in this part will be blocked and affect the filtration. Therefore, the electric cylinder 14 drives the long filter screen 13 to move upward a small distance every once in a while, so that the part of the filter screen participating in the filtration operation is the clean filter screen part, ensuring the smooth progress of the air filtration part operation and ensuring that the air pump 1 can smoothly obtain the filtered air.
Claims
1. An air supplement device applicable to the pulverized coal injection pipeline of a blast furnace, characterized in that: The invention comprises a sealing part, a docking part, an air pump (1) and a filtering part; one end of the docking part is docked with the coal injection pipe, and the other end of the docking part is connected to the air pump (1); the filtering part is connected to the air pump (1); the sealing part is arranged on the docking part; the docking part comprises a trumpet hopper (2), a cylinder (3), an annular sheet (4) and a docking tube (5); the end of the trumpet hopper (2) with a larger diameter is arranged at one end of the cylinder (3), and the annular sheet (4) is arranged at the other end of the cylinder (3); the end of the trumpet hopper (2) with a smaller diameter is obliquely docked with the coal injection pipe; the docking tube (5) is docked with the inner hole of the annular sheet (4), and the other end of the docking tube (5) is docked with the air outlet of the air pump (1).
2. The air supplement device applicable to the pulverized coal injection pipeline of the blast furnace according to claim 1, wherein: The sealing part comprises a cylinder (6), a slide (7) and a sealing mechanism; the cylinder (6) shell is arranged on the outer wall of the annular sheet (4); a square socket is arranged on the annular sheet, and a sealing ring is arranged on the inner wall of the square socket; the slide (7) passes through the square socket of the annular sheet; the sealing mechanism is located in the cylinder (3) and is connected to one end of the slide (7); the end of the piston rod of the cylinder (6) is connected to one end of the slide (7), and the axis of the piston rod of the cylinder (6) is parallel to the center line of the slide (7).
3. The air supplement device applicable to the pulverized coal injection pipeline of a blast furnace according to claim 2, characterized in that: The sealing mechanism comprises a sliding column (8), a connecting rod (9) and a conical head (10); the sliding column (8) is located in the cylinder (3), and one end of the sliding column (8) is connected to the end of the slide plate (7) away from the cylinder (6); the connecting rod (9) is arranged at the end of the sliding column (8) away from the slide plate (7); the center line of the connecting rod (9) is parallel to the center line of the slide plate (7); one end of the connecting rod (9) is connected to the center of the end face of the conical head (10) away from the tip; the axis of the conical head (10) is parallel to the center line of the slide plate (7); the outer wall of the conical head (10) is in close contact with the inner wall of the annular sheet (4), and the inner wall of the annular sheet is provided with a circle of sealing ring.
4. The air supplement device applicable to the pulverized coal injection pipeline of a blast furnace according to claim 3, characterized in that: The filtering part includes a small square cylinder (11), a large square cylinder (12), a long filter screen (13) and an electric cylinder (14); the small square cylinder (11) is docked with the air inlet of the air pump (1); the large square cylinder (12) is sleeved at one end of the small square cylinder (11) away from the air pump (1), and the inner wall of the large square cylinder (12) is in close contact with the outer wall of the small square cylinder (11); one end of the large square cylinder (12) away from the air pump (1) extends out of the small square cylinder (11); strip-shaped holes are provided on both the top end face and the bottom end face of the large square cylinder (12), and the strip-shaped holes at the bottom are directly below the strip-shaped holes at the top. The strip-shaped holes are located on the part where the large square cylinder (12) extends out of the small square cylinder (11), and the length of the strip-shaped holes is the same as the distance between the inner walls on both sides of the large square cylinder (12); the long filter screen (13) passes through the strip-shaped holes on the top end face and the bottom end face of the large square cylinder (12), and the outer wall of the long filter screen (13) is in close contact with the inner wall of the large square cylinder (12); the housing of the electric cylinder (14) is arranged on the outer wall of the large square cylinder (12), and its piston rod faces downward; a support plate is arranged at the end of the piston rod of the electric cylinder (14), and the top end face of the support plate is in contact with the bottom end face of the long filter screen (13).