CN111438144A - Device for automatically dredging static pressure pipeline of blast furnace body on line and using method thereof - Google Patents
Device for automatically dredging static pressure pipeline of blast furnace body on line and using method thereof Download PDFInfo
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- CN111438144A CN111438144A CN202010283131.0A CN202010283131A CN111438144A CN 111438144 A CN111438144 A CN 111438144A CN 202010283131 A CN202010283131 A CN 202010283131A CN 111438144 A CN111438144 A CN 111438144A
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- blast furnace
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- static pressure
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- 230000003068 static effect Effects 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000010079 rubber tapping Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/047—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a device for automatically dredging a static pressure pipeline of a blast furnace body on line, which is characterized in that: including cylinder, motor, integral key shaft and link assembly, the motor is spline hollow shaft motor, and the integral key shaft passes the motor, and the one end and the cylinder of integral key shaft are connected, and the other end and the link assembly of integral key shaft are connected, and link assembly stretches into in the blast furnace shaft pressure-measuring pipe. The cylinder promotes integral key shaft reciprocating motion thereby drives link assembly reciprocating motion, thereby motor drive integral key shaft rotary motion drives link assembly rotary motion. The motor outputs power to drive the spline shaft to drive the connecting rod assembly to rotate. The connecting rod assembly comprises a connecting rod and a working rod, the connecting rod and the working rod are of an integrated structure, the connecting rod is connected with the spline shaft, the working rod is provided with a helical blade, and the helical blade rolls materials in the internal piezometer tube forwards in the rotating process. The invention also discloses a use method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line.
Description
Technical Field
The invention belongs to the technical field of steel smelting, and particularly relates to a device for automatically dredging a static pressure pipeline of a blast furnace body on line and a using method thereof.
Background
The patent Z L201120224349.5 provides an electric dredging drill for dredging a static pressure taking port of the furnace body, which can only partially replace manual dredging although manpower and time are saved, and simultaneously still limit the operation in the damping-down maintenance time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for automatically dredging a static pressure pipeline of a blast furnace body on line, which has the advantages of simple structure, low cost, stable and reliable operation, stable and reliable blockage prevention and the use method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an on-line automatic mediation blast furnace shaft static pressure pipeline's device, includes cylinder, motor, integral key shaft and link assembly, the motor is spline hollow shaft motor, and the integral key shaft passes the motor, and the one end and the cylinder of integral key shaft are connected, and the other end and the link assembly of integral key shaft are connected, and link assembly stretches into in the blast furnace shaft pressure-measuring pipe.
Further, link assembly includes connecting rod and work lever, and connecting rod and work lever structure as an organic whole, connecting rod and spline shaft are connected, become to be equipped with helical blade on the work lever, and at rotatory in-process, helical blade rolls the material in the interior piezometer pipe forward.
Further, be equipped with flange I, flange II and binary channels rotary joint between integral key shaft and the link assembly, the one end of binary channels rotary joint is passed through flange I and is connected with the integral key shaft, and the other end of binary channels rotary joint passes through flange II and is connected with link assembly.
Furthermore, the device also comprises a support frame, the air cylinder and the motor are fixedly connected on the support frame, and the support frame is connected on the furnace shell.
Furthermore, the expansion end of cylinder is equipped with the shift fork, and the integral key shaft passes through the mounting panel to be connected on the cylinder, and the integral key shaft is arranged with the movable rod parallel of cylinder, and the one end of shift fork is connected on the movable rod of cylinder, and the other end and the splined shaft of shift fork are connected.
Furthermore, a thrust bearing is arranged between the shifting fork and the spline shaft, and a movable rod of the air cylinder stretches and retracts in a reciprocating mode to drive the shifting fork to drive the spline shaft to move in a reciprocating mode.
Furthermore, the device also comprises a pressure taking outer sleeve, an inclined straight-through hole is formed in the prefabricated refractory brick in the blast furnace wall, the pressure taking outer sleeve is arranged in the straight-through hole, the straight-through hole is communicated with the pressure taking outer sleeve, and the pressure taking outer sleeve extends outwards out of the blast furnace wall.
Furthermore, the device also comprises a pressure taking pipe, one end of the pressure taking outer sleeve is communicated with the through hole in the blast furnace wall, the other end of the pressure taking outer sleeve is communicated with the pressure taking pipe, and the connecting rod assembly extends into the pressure taking outer sleeve.
Furthermore, the device also comprises a computer, wherein an air pressure sensor is arranged in the furnace body static pressure pipeline, the air pressure sensor, the air cylinder and the motor are all connected with the computer, and a threshold value used for controlling the operation of the air cylinder and the motor is arranged in the computer.
Based on the device for automatically dredging the static pressure pipeline of the blast furnace body on line, the invention also relates to a using method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line, and the using method comprises the following steps:
a. a device for automatically dredging a static pressure pipeline of a blast furnace body on line is arranged at the upper part of a pressure taking outer sleeve and is fixed with a furnace shell through a reinforcing rib, and a connecting rod assembly extends into the pressure taking outer sleeve;
b. when the pressure in the furnace body static pressure pipeline exceeds a threshold value in a computer, under the control of the computer, a motor and a cylinder are linked to push and rotate a connecting rod assembly to drive a helical blade to do primary telescopic rotary motion, the connecting rod assembly rotates forwards, and the helical blade rolls out/pushes out the granular materials in a pressure measuring pipe; the connecting rod assembly reversely rotates and retreats, retreats and stops, continuously rotates, the helical blade rolls out materials carried by the blades to the end part of the inner pressure measuring pipe, and meanwhile, the helical blade is matched with a short-gap high-pressure blowing device to blow the materials out of the pressure measuring pipe, so that the furnace body is in static pressure detection for a long time.
The technical scheme adopted by the invention has the advantages that:
1. the invention can effectively clear the fused mass blockage with larger viscosity in the static pressure tapping pipe of the furnace body by utilizing the principles of crushing, pushing and blowing, and can dredge the fused mass blockage into the furnace. A linkage mode of 'motor + air cylinder' is adopted, the connecting rod assembly is pushed and rotated to drive the spiral blade head, the mechanism rotates forwards, and the granular materials are ground out or pushed out from the piezometer tube in the spiral blade head; the mechanism reversely rotates and retreats, and after retreating and stopping, the mechanism continuously rotates, and the helical blades grind materials carried by the blades out to the end part of the inner pressure measuring pipe. Meanwhile, the short-gap high-pressure blowing is matched, so that the material is blown out from the pressure measuring pipe, and the long-time static pressure detection of the furnace body is ensured.
2. The invention provides a device for automatically dredging a static pressure pipeline of a blast furnace shaft on line and a using method thereof, compared with the prior art, the device can effectively clear a molten substance blockage with higher viscosity in a static pressure tapping pipe of the furnace shaft by utilizing the principles of crushing, pushing out and blowing, and can be dredged into the furnace; the developed device has simple structure and low cost, and can effectively dredge the static pressure pipeline of the blast furnace body and prevent blockage.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic view of the device for automatically dredging the static pressure pipeline of the blast furnace body on line;
FIG. 2 is a schematic cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is an overall schematic view of the online automatic dredging of the static pressure pipeline device of the blast furnace body installed on the blast furnace.
The labels in the above figures are respectively: 1-a cylinder; 2, a motor; 3-a support frame; 4-a spline shaft; 41. mounting a plate; 5-flange I; 6-a connecting rod assembly; 61. a connecting rod; 62. a working lever; 7-asbestos rubber spacers; 8-a shifting fork; 9-thrust ball bearing; 11-positioning the bracket; 12-a two-way swivel; 13-helical blades; 14-flange assembly ii; 15-pressure measuring outer sleeve; 16-a pressure tapping pipe; 17-reinforcing ribs.
Detailed Description
In the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the device for automatically dredging the static pressure pipeline of the blast furnace shaft on line is characterized in that: including cylinder 1, motor 2, integral key shaft 4 and link assembly 6, motor 2 is spline hollow shaft motor, and integral key shaft 4 passes motor 2, and integral key shaft 4's one end is connected with cylinder 1, and integral key shaft 4's the other end is connected with link assembly 6, and link assembly 6 stretches into in the blast furnace shaft pressure-measuring pipe. The cylinder 1 pushes the spline shaft 4 to reciprocate so as to drive the connecting rod assembly 6 to reciprocate, and the motor 2 drives the spline shaft 4 to rotate so as to drive the connecting rod assembly 6 to rotate.
The motor outputs power to drive the spline shaft 4 to drive the connecting rod assembly 6 to rotate. The connecting rod assembly 6 comprises a connecting rod 61 and a working rod 62, the connecting rod 61 and the working rod 62 are of an integral structure, the connecting rod 61 is connected with the spline shaft 4, the working rod 62 is provided with a helical blade 13, and in the rotating process, the helical blade 13 rolls materials in the inner pressure measuring pipe forwards.
The invention can effectively clear the fused mass blockage with larger viscosity in the static pressure tapping pipe of the furnace body by utilizing the principles of crushing, pushing and blowing, and can dredge the fused mass blockage into the furnace. A linkage mode of 'motor + air cylinder' is adopted, the connecting rod assembly is pushed and rotated to drive the spiral blade head, the mechanism rotates forwards, and the granular materials are ground out or pushed out from the piezometer tube in the spiral blade head; the mechanism reversely rotates and retreats, and after retreating and stopping, the mechanism continuously rotates, and the helical blades grind materials carried by the blades out to the end part of the inner pressure measuring pipe. Meanwhile, the short-gap high-pressure blowing is matched, so that the material is blown out from the pressure measuring pipe, and the long-time static pressure detection of the furnace body is ensured.
Be equipped with flange I5, flange II 14 and binary channels rotary joint 12 between integral key shaft 4 and link assembly 6, the one end of binary channels rotary joint 12 is passed through flange I5 and is connected with integral key shaft 4, and the other end of binary channels rotary joint 12 passes through flange II 14 and is connected with link assembly 6. Preferably, an asbestos rubber spacer 7 is arranged between the flange plates of the flange I5, so that the damage to the motor 2 caused by the direct transmission of high temperature to the motor through the connecting rod assembly 6 is avoided.
The device for automatically dredging the static pressure pipeline of the blast furnace body on line further comprises a support frame 3, the cylinder 1 and the motor 2 are fixedly connected onto the support frame 3, and the support frame 3 is connected onto the furnace shell. In order to strengthen the structural strength, a reinforcing rib 17 is arranged between the support frame 3 and the furnace shell. The double-channel rotary joint 12 is connected to the support frame 3 through a positioning bracket 11.
The expansion end of cylinder 1 is equipped with shift fork 8, and integral key shaft 4 passes through mounting panel 41 to be connected on cylinder 1, and integral key shaft 4 and cylinder 1's movable rod parallel arrangement, the one end of shift fork 8 is connected on cylinder 1's movable rod, and the other end of shift fork 8 is connected with integral key shaft 4. A thrust bearing 9 is arranged between the shifting fork 8 and the spline shaft 4, and a movable rod of the air cylinder 1 stretches and retracts in a reciprocating mode to drive the shifting fork 8 to drive the spline shaft 4 to move in a reciprocating mode. The cylinder propels or pulls back the spline shaft through the shifting fork 8 and the thrust ball bearing 9, thereby driving the reciprocating motion of the connecting rod component.
The device for automatically dredging the static pressure pipeline of the blast furnace body on line further comprises a pressure taking outer sleeve 15 and a pressure taking pipe 16, an inclined straight-through hole is formed in a prefabricated refractory brick in the blast furnace wall, the pressure taking outer sleeve 15 is arranged in the straight-through hole, the straight-through hole is communicated with the pressure taking outer sleeve 15, and the pressure taking outer sleeve 15 extends out of the blast furnace wall. One end of the pressure-taking outer sleeve 15 is communicated with a straight-through hole in the wall of the blast furnace, the other end of the pressure-taking outer sleeve 15 is communicated with a pressure-taking pipe 16, and the connecting rod assembly 6 extends into the pressure-taking outer sleeve 15.
The device for automatically dredging the blast furnace body static pressure pipeline on line further comprises a computer, wherein an air pressure sensor is arranged in the furnace body static pressure pipeline, the air pressure sensor, the air cylinder 1 and the motor 2 are all connected with the computer, and a threshold value used for controlling the operation of the air cylinder 1 and the motor 2 is arranged in the computer. Specifically, the purging air source and the device for automatically dredging the static pressure pipeline of the blast furnace body on line are both communicated with a computer, and the valve of the purging air source and the device are controlled by the computer. When the pressure exceeds the high-report limit value of the pressure switch, under the action of a valve controlled by a computer, the motor 2 and the cylinder 1 are linked to push and rotate the connecting rod assembly 6 to drive the helical blade 13 to do primary telescopic motion, the connecting rod assembly 6 rotates forwards, and the helical blade 13 rolls out/pushes out the particle materials in the pressure measuring pipe; connecting rod assembly 6 reverse rotation moves back, moves back and stops the back, lasts the rotation, and helical blade 13 rolls out the material that the blade was smugglied secretly to interior pressure cell pipe end portion, and the short clearance high pressure of cooperation sweeps simultaneously blows off the material from in the pressure cell, guarantees the long-time static pressure of furnace shaft and detects.
Based on the device for automatically dredging the static pressure pipeline of the blast furnace body on line, the invention also discloses a using method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line, and the using method comprises the following steps:
a. a device for automatically dredging a static pressure pipeline of a blast furnace body on line is arranged at the upper part of a pressure taking outer sleeve 15 and is fixed with a furnace shell through a reinforcing rib 17, and a connecting rod assembly 6 extends into the pressure taking outer sleeve 15;
b. when the pressure in the furnace body static pressure pipeline exceeds the internal threshold value of the computer, under the control of the computer, the motor 2 and the cylinder 1 are linked to push and rotate the connecting rod assembly 6 to drive the helical blade 13 to do primary telescopic rotary motion, the connecting rod assembly 6 rotates forwards, and the helical blade 13 rolls out/pushes out the granular materials in the pressure measuring pipe; connecting rod assembly 6 reverse rotation moves back, moves back and stops the back, and continuous rotation, helical blade 13 are rolled out the material that the blade was smugglied secretly to interior pressure cell pipe end portion, and the short clearance high pressure of cooperation sweeps simultaneously blows off the material from in the pressure cell, makes the stack shell be in the static pressure for a long time and detects.
The invention provides a device for automatically dredging a static pressure pipeline of a blast furnace shaft on line and a using method thereof, compared with the prior art, the device can effectively clear a molten substance blockage with higher viscosity in a static pressure tapping pipe of the furnace shaft by utilizing the principles of crushing, pushing out and blowing, and can be dredged into the furnace; the developed device has simple structure and low cost, and can effectively dredge the static pressure pipeline of the blast furnace body and prevent blockage.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the technical solution of the invention or to apply the concept and technical solution of the invention directly to other occasions without modification.
Claims (10)
1. The utility model provides a device of online automatic mediation blast furnace shaft static pressure pipeline which characterized in that: including cylinder (1), motor (2), integral key shaft (4) and link assembly (6), motor (2) are spline hollow shaft motor, and integral key shaft (4) pass motor (2), and the one end and cylinder (1) of integral key shaft (4) are connected, and the other end and the link assembly (6) of integral key shaft (4) are connected, and link assembly (6) stretch into in the blast furnace shaft pressure-measuring pipe.
2. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line as claimed in claim 1, is characterized in that: connecting rod assembly (6) are including connecting rod (61) and working lever (62), and connecting rod (61) and working lever (62) structure as an organic whole, and connecting rod (61) are connected with integral key shaft (4), become on working lever (62) to be equipped with helical blade (13), and at rotatory in-process, helical blade (13) are rolled the material in the interior pressure-measuring pipe forward.
3. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line as claimed in claim 2, wherein: be equipped with flange I (5), flange II (14) and binary channels rotary joint (12) between integral key shaft (4) and link assembly (6), the one end of binary channels rotary joint (12) is passed through flange I (5) and is connected with integral key shaft (4), and the other end of binary channels rotary joint (12) passes through flange II (14) and is connected with link assembly (6).
4. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line as claimed in claim 2 or 3, wherein: the device further comprises a support frame (3), the air cylinder (1) and the motor (2) are fixedly connected onto the support frame (3), and the support frame (3) is connected onto the furnace shell.
5. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line as claimed in claim 4, wherein: the expansion end of cylinder (1) is equipped with shift fork (8), and integral key shaft (4) are connected on cylinder (1) through mounting panel (41), and integral key shaft (4) and the movable rod parallel arrangement of cylinder (1), the one end of shift fork (8) is connected on the movable rod of cylinder (1), and the other end and the integral key shaft (4) of shift fork (8) are connected.
6. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line according to claim 5, is characterized in that: a thrust bearing (9) is arranged between the shifting fork (8) and the spline shaft (4), and the movable rod of the air cylinder (1) stretches and retracts in a reciprocating mode to drive the shifting fork (8) to drive the spline shaft (4) to move in a reciprocating mode.
7. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line as claimed in claim 6, wherein: the device also comprises a pressure taking outer sleeve (15), an inclined straight-through hole is formed in the prefabricated refractory brick in the blast furnace wall, the pressure taking outer sleeve (15) is arranged in the straight-through hole, the straight-through hole is communicated with the pressure taking outer sleeve (15), and the pressure taking outer sleeve (15) extends outwards out of the blast furnace wall.
8. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line according to claim 7, is characterized in that: the device also comprises a pressure taking pipe (16), one end of the pressure taking outer sleeve (15) is communicated with the straight-through hole in the wall of the blast furnace, the other end of the pressure taking outer sleeve (15) is communicated with the pressure taking pipe (16), and the connecting rod assembly (6) extends into the pressure taking outer sleeve (15).
9. The device for automatically dredging the static pressure pipeline of the blast furnace shaft on line according to claim 8, is characterized in that: the device also comprises a computer, wherein an air pressure sensor is arranged in the furnace body static pressure pipeline, the air pressure sensor, the air cylinder (1) and the motor (2) are all connected with the computer, and a threshold value used for controlling the operation of the air cylinder (1) and the motor (2) is arranged in the computer.
10. The use method of the online automatic dredging blast furnace body static pressure pipeline device is characterized in that: the device for automatically dredging the static pressure pipeline of the blast furnace shaft on line based on any one of claims 1 to 9 is used as follows:
a. a device for automatically dredging a static pressure pipeline of a blast furnace body on line is arranged at the upper part of a pressure taking outer sleeve (15) and is fixed with a furnace shell through a reinforcing rib (17), and a connecting rod assembly (6) extends into the pressure taking outer sleeve (15);
b. when the pressure in the furnace body static pressure pipeline exceeds an internal threshold value of a computer, under the control of the computer, a motor (2) and a cylinder (1) are linked to push and rotate a connecting rod assembly (6) to drive a helical blade (13) to do one-time telescopic rotary motion, the connecting rod assembly (6) rotates forwards, and the helical blade (13) rolls out/pushes out particle materials in a piezometer pipe; link assembly (6) reverse rotation back, retreat and stop the back, continuously rotate, helical blade (13) are rolled out the material that the blade was smugglied secretly to interior pressure tube end portion, cooperate short clearance high pressure to sweep simultaneously, blow off the material from the pressure tube in, make the stack shell be in the static pressure for a long time and detect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283131.0A CN111438144B (en) | 2020-04-13 | 2020-04-13 | Online automatic dredging device for static pressure pipeline of blast furnace body and application method of online automatic dredging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283131.0A CN111438144B (en) | 2020-04-13 | 2020-04-13 | Online automatic dredging device for static pressure pipeline of blast furnace body and application method of online automatic dredging device |
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| CN111438144A true CN111438144A (en) | 2020-07-24 |
| CN111438144B CN111438144B (en) | 2024-03-08 |
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| CN2601975Y (en) * | 2003-07-28 | 2004-02-04 | 刘吉川 | Bin deroppilation machine |
| JP2006143263A (en) * | 2004-11-18 | 2006-06-08 | Japan Steel Works Ltd:The | Hopper device and its driving method |
| CN201440038U (en) * | 2009-06-30 | 2010-04-21 | 北京七星华创电子股份有限公司 | Diffusion furnace door sealing structure |
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