CN111438144B - Online automatic dredging device for static pressure pipeline of blast furnace body and application method of online automatic dredging device - Google Patents
Online automatic dredging device for static pressure pipeline of blast furnace body and application method of online automatic dredging device Download PDFInfo
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- CN111438144B CN111438144B CN202010283131.0A CN202010283131A CN111438144B CN 111438144 B CN111438144 B CN 111438144B CN 202010283131 A CN202010283131 A CN 202010283131A CN 111438144 B CN111438144 B CN 111438144B
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- connecting rod
- spline shaft
- rod assembly
- motor
- furnace body
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- 230000003068 static effect Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000010926 purge Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 230000009365 direct transmission Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Classifications
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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
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: the novel high-temperature furnace body pressure measuring device comprises a cylinder, a motor, a spline shaft and a connecting rod assembly, wherein the motor is a spline hollow shaft motor, the spline shaft penetrates through the motor, one end of the spline shaft is connected with the cylinder, the other end of the spline shaft is connected with the connecting rod assembly, and the connecting rod assembly stretches into a pressure measuring pipe in the furnace body of the blast furnace. The air cylinder pushes the spline shaft to reciprocate so as to drive the connecting rod assembly to reciprocate, and the motor drives the spline shaft to rotate so as to drive the connecting rod assembly to rotate. 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 a spline shaft, a spiral blade is arranged on the working rod, and in the rotating process, the spiral blade rolls materials in the inner pressure measuring tube forwards. The invention also discloses a using 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 use method thereof.
Background
The static pressure change of the blast furnace body has strong guidance on the operation of the blast furnace, generally, a steel pipe is buried in the blast furnace to be used as a sampling pipeline, and nitrogen is periodically used for purging and keeping the sampling pipeline unobstructed so as to carry out static pressure detection. However, the sampling pipeline is easy to be blocked due to high humidity, high pressure and high dust in the furnace, so that static pressure measurement data are distorted, and the guiding significance on the operation of the blast furnace is lost. Patent ZL 2011 2 0224349.5 provides an electric dredging drill rod for dredging a static pressure taking port of a furnace body, which can only partially replace manual dredging despite labor and time saving, and still is limited in operation during a damping down overhauling time.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the device for automatically dredging the static pressure pipeline of the blast furnace body on line, which has the advantages of simple structure, low cost and stable and reliable operation, and the invention also provides a use method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a device of online automatic mediation blast furnace shaft static pressure pipeline, includes cylinder, motor, spline shaft and link assembly, the motor is spline hollow shaft motor, and the spline shaft passes the motor, and the one end and the cylinder of spline shaft are connected, and the other end and the link assembly of spline shaft are connected, and link assembly stretches into in the blast furnace shaft pressure measurement pipe.
Further, 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 a spline shaft, a spiral blade is arranged on the working rod, and in the rotating process, the spiral blade rolls materials in the inner pressure measuring tube forwards.
Further, be equipped with flange I, flange II and binary channels rotary joint between spline shaft and the link assembly, binary channels rotary joint's one end is connected with the spline shaft through flange I, and binary channels rotary joint's the other end is connected with the link assembly through flange II.
Further, the device also comprises a support frame, the air cylinder and the motor are fixedly connected to the support frame, and the support frame is connected to the furnace shell.
Further, the movable end of the cylinder is provided with a shifting fork, the spline shaft is connected to the cylinder through a mounting plate, the spline shaft is arranged in parallel with the movable rod of the cylinder, one end of the shifting fork is connected to the movable rod of the cylinder, and the other end of the shifting fork is connected with the spline shaft.
Further, a thrust bearing is arranged between the shifting fork and the spline shaft, and the movable rod of the air cylinder drives the shifting fork to reciprocate in a telescopic manner to drive the spline shaft to reciprocate.
Further, the device also comprises a pressure taking outer sleeve, an inclined through hole is formed in the prefabricated refractory brick in the blast furnace wall, the pressure taking outer sleeve is arranged in the through hole, the through hole is communicated with the pressure taking outer sleeve, and the pressure taking outer sleeve extends out of the blast furnace wall.
Further, 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.
Further, the device also comprises a computer, an air pressure sensor is arranged in the static pressure pipeline of the furnace body, the air pressure sensor, the air cylinder and the motor are all connected with the computer, and a threshold value 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 use method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line, which comprises the following steps:
a. the device for automatically dredging the static pressure pipeline of the blast furnace body on line is arranged at the upper part of the pressure taking outer sleeve, and is fixed with the furnace shell through a reinforcing rib, and the connecting rod assembly extends into the pressure taking outer sleeve;
b. when the pressure in the static pressure pipeline of the furnace body exceeds a threshold value in a computer, under the control of the computer, the motor and the air cylinder are linked to push and rotate the connecting rod assembly to drive the spiral blade to do one-time telescopic rotation movement, the connecting rod assembly forwards rotates and advances, and the spiral blade rolls out/pushes out the granular materials in the pressure measuring pipe; the connecting rod assembly reversely rotates and retreats, after the retreating is stopped, the connecting rod assembly continuously rotates, the spiral blades roll out materials carried by the blades to the end part of the inner pressure measuring pipe, and meanwhile, the connecting rod assembly is matched with a short-gap high-pressure purging device to blow out the materials from the pressure measuring pipe, so that the furnace body is in static pressure detection for a long time.
The technical scheme of the invention has the advantages that:
1. the invention can effectively clean the melt blockage with larger viscosity in the static pressure taking pipe of the furnace body by utilizing the principle of grinding, pushing and blowing, and can be dredged into the furnace. The linkage mode of a motor and an air cylinder is adopted to push and rotate the connecting rod assembly to drive the spiral blade head, the mechanism rotates forward to advance, and the granular materials are rolled out or pushed out from the pressure measuring pipe in the spiral blade head; the mechanism rotates reversely to retreat, and continuously rotates after retreating is stopped, and the spiral blades roll out materials carried by the blades to the end part of the inner pressure measuring pipe. Meanwhile, the material is blown out of the pressure measuring tube by matching with the short-gap high-pressure purging, so that long-time static pressure detection of the furnace body is ensured.
2. Compared with the prior art, the device for automatically dredging the static pressure pipeline of the blast furnace body on line can effectively clean the melt blockage with larger viscosity in the static pressure taking pipe of the furnace body by utilizing the principle of grinding, pushing and blowing, and can dredge the blockage 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 attached drawings and detailed description:
FIG. 1 is a schematic diagram of an on-line automatic blast furnace body static pressure pipeline dredging device;
FIG. 2 is a schematic cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is an overall schematic diagram of an on-line automatic blast furnace shaft static pressure pipeline dredging device after being installed on a blast furnace.
The labels in the above figures are respectively: 1-a cylinder; 2-an electric motor; 3-supporting frames; 4-spline shaft; 41. a mounting plate; 5-flange I; 6-a connecting rod assembly; 61. a connecting rod; 62. a working rod; 7-asbestos rubber spacers; 8-shifting fork; 9-thrust ball bearings; 11-positioning a bracket; 12-double-channel rotary joint; 13-helical blades; 14-a flange assembly II; 15-taking out the outer sleeve; 16-a pressure taking tube; 17-reinforcing ribs.
Detailed Description
In the present invention, it should 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 the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 to 3, a device for automatically dredging a static pressure pipeline of a blast furnace body on line is characterized in that: the novel high-temperature furnace body pressure measuring device comprises a cylinder 1, a motor 2, a spline shaft 4 and a connecting rod assembly 6, wherein the motor 2 is a spline hollow shaft motor, the spline shaft 4 penetrates through the motor 2, one end of the spline shaft 4 is connected with the cylinder 1, the other end of the spline shaft 4 is connected with the connecting rod assembly 6, and the connecting rod assembly 6 stretches into a pressure measuring pipe in a furnace body of the blast furnace. The air 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 integrated structure, the connecting rod 61 is connected with the spline shaft 4, the working rod 62 is provided with a spiral blade 13, and in the rotating process, the spiral blade 13 rolls materials in an inner pressure measuring tube forwards.
The invention can effectively clean the melt blockage with larger viscosity in the static pressure taking pipe of the furnace body by utilizing the principle of grinding, pushing and blowing, and can be dredged into the furnace. The linkage mode of a motor and an air cylinder is adopted to push and rotate the connecting rod assembly to drive the spiral blade head, the mechanism rotates forward to advance, and the granular materials are rolled out or pushed out from the pressure measuring pipe in the spiral blade head; the mechanism rotates reversely to retreat, and continuously rotates after retreating is stopped, and the spiral blades roll out materials carried by the blades to the end part of the inner pressure measuring pipe. Meanwhile, the material is blown out of the pressure measuring tube by matching with the short-gap high-pressure purging, so that long-time static pressure detection of the furnace body is ensured.
A flange I5, a flange II 14 and a double-channel rotary joint 12 are arranged between the spline shaft 4 and the connecting rod assembly 6, one end of the double-channel rotary joint 12 is connected with the spline shaft 4 through the flange I5, and the other end of the double-channel rotary joint 12 is connected with the connecting rod assembly 6 through the flange II 14. Preferably, an asbestos-rubber spacer 7 is added between the flanges of the flange I5 to avoid damage to the motor by directly transmitting high temperature to the motor 2 through the connecting rod assembly 6.
The device for automatically dredging the static pressure pipeline of the blast furnace body on line further comprises a support frame 3, the air cylinder 1 and the motor 2 are fixedly connected to the support frame 3, and the support frame 3 is connected to the furnace shell. In order to strengthen the structural strength, reinforcing ribs 17 are provided between the support frame 3 and the furnace shell. The double-channel rotary joint 12 is connected to the support frame 3 through the positioning bracket 11.
The movable end of cylinder 1 is equipped with shift fork 8, and spline shaft 4 passes through mounting panel 41 to be connected on cylinder 1, and spline shaft 4 is arranged with the movable rod parallel of cylinder 1, and the one end of shift fork 8 is connected on the movable rod of cylinder 1, and the other end and the spline shaft 4 of shift fork 8 are connected. 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 drives the shifting fork 8 to drive the spline shaft 4 to reciprocate. The cylinder pushes 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 assembly.
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, wherein an inclined through hole is formed in the prefabricated refractory brick in the blast furnace wall, the pressure taking outer sleeve 15 is arranged in the through hole, the 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. One end of the pressure taking outer sleeve 15 is communicated with a through hole in the blast furnace wall, 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 static pressure pipeline of the blast furnace body on line further comprises a computer, wherein an air pressure sensor is arranged in the static pressure pipeline of the blast furnace body, the air pressure sensor, the air cylinder 1 and the motor 2 are all connected with the computer, and a threshold value 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 device is controlled by the computer. When the pressure exceeds the high-limit value of the pressure switch, under the action of a valve controlled by a computer, the motor 2 and the air cylinder 1 are linked to push and rotate the connecting rod assembly 6 to drive the spiral blade 13 to do one-time telescopic movement, the connecting rod assembly 6 rotates forward to advance, and the spiral blade 13 rolls out/pushes out the granular materials in the pressure measuring pipe; the connecting rod assembly 6 reversely rotates and retreats, and continuously rotates after the retreating is stopped, the spiral blades 13 roll out materials carried by the blades to the end part of the inner pressure measuring pipe, and meanwhile, the materials are blown out of the pressure measuring pipe in a matched mode through short-gap high-pressure purging, so that long-time static pressure detection of the furnace body is guaranteed.
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, which comprises the following steps:
a. the device for automatically dredging the static pressure pipeline of the blast furnace body on line is arranged at the upper part of the pressure taking outer sleeve 15 and is fixed with the furnace shell through a reinforcing rib 17, and the connecting rod assembly 6 extends into the pressure taking outer sleeve 15;
b. when the pressure in the static pressure pipeline of the furnace body exceeds a threshold value in a computer, under the control of the computer, the motor 2 and the air cylinder 1 are linked to push and rotate the connecting rod assembly 6 to drive the spiral blade 13 to do one-time telescopic rotation movement, the connecting rod assembly 6 forwards rotates and advances, and the spiral blade 13 rolls out/pushes out the granular materials in the pressure measuring pipe; the connecting rod assembly 6 reversely rotates and retreats, and continuously rotates after the retreating is stopped, the spiral blades 13 roll out materials carried by the blades to the end part of the inner pressure measuring pipe, and meanwhile, the materials are blown out of the pressure measuring pipe in a matched mode through short-gap high-pressure purging, so that the furnace body is in static pressure detection for a long time.
Compared with the prior art, the device for automatically dredging the static pressure pipeline of the blast furnace body on line can effectively clean the melt blockage with larger viscosity in the static pressure taking pipe of the furnace body by utilizing the principle of grinding, pushing and blowing, and can dredge the blockage 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.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified in various ways, or of being applied to other applications without modification, without departing from the scope of the invention.
Claims (2)
1. The application method of the device for automatically dredging the static pressure pipeline of the blast furnace body on line is characterized by comprising the following steps of: the device for automatically dredging the static pressure pipeline of the blast furnace body on line comprises a cylinder (1), a motor (2), a spline shaft (4) and a connecting rod assembly (6), wherein the motor (2) is a spline hollow shaft motor, the spline shaft (4) penetrates through the motor (2), one end of the spline shaft (4) is connected with the cylinder (1), the other end of the spline shaft (4) is connected with the connecting rod assembly (6), and the connecting rod assembly (6) stretches into a pressure measuring pipe in the blast furnace body; 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 integrated structure, the connecting rod (61) is connected with the spline shaft (4), the working rod (62) is provided with a spiral blade (13), and in the rotating process, the spiral blade (13) rolls materials in the inner pressure measuring tube forwards; the device also comprises a pressure taking outer sleeve (15), an inclined through hole is formed in the prefabricated refractory brick in the blast furnace wall, the pressure taking outer sleeve (15) is arranged in the through hole, the 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; the device also comprises a pressure taking pipe (16), one end of the pressure taking outer sleeve (15) is communicated with a through hole in the blast furnace wall, 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); a flange I (5), a flange II (14) and a double-channel rotary joint (12) are arranged between the spline shaft (4) and the connecting rod assembly (6), one end of the double-channel rotary joint (12) is connected with the spline shaft (4) through the flange I (5), and the other end of the double-channel rotary joint (12) is connected with the connecting rod assembly (6) through the flange II (14); the device also comprises a support frame (3), wherein the air cylinder (1) and the motor (2) are fixedly connected to the support frame (3), and the support frame (3) is connected to the furnace shell; a shifting fork (8) is arranged at the movable end of the air cylinder (1), the spline shaft (4) is connected to the air cylinder (1) through a mounting plate (41), the spline shaft (4) is arranged in parallel with a movable rod of the air cylinder (1), one end of the shifting fork (8) is connected to the movable rod of the air cylinder (1), and the other end of the shifting fork (8) is connected with the spline shaft (4); 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) drives the shifting fork (8) to reciprocate; an asbestos rubber spacer (7) is added between the flanges of the flange I (5), so that the damage to the motor caused by the direct transmission of high temperature to the motor (2) through the connecting rod assembly (6) is avoided; a reinforcing rib (17) is arranged between the supporting frame (3) and the furnace shell;
the using method comprises the following steps:
a. the device for automatically dredging the static pressure pipeline of the blast furnace body on line is arranged at the upper part of the pressure taking outer sleeve (15) and is fixed with the furnace shell through a reinforcing rib (17), and the connecting rod assembly (6) extends into the pressure taking outer sleeve (15);
b. when the pressure in the static pressure pipeline of the furnace body exceeds a threshold value in a 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 spiral blade (13) to do one-time telescopic rotation, the connecting rod assembly (6) rotates forward, and the spiral blade (13) rolls out/pushes out the granular materials in the pressure measuring pipe; the connecting rod assembly (6) reversely rotates and retreats, and continuously rotates after retreating and stopping, the spiral blades (13) roll out materials carried by the blades to the end part of the inner pressure measuring pipe, and meanwhile, the materials are blown out of the pressure measuring pipe in a matched mode through short-gap high-pressure purging, so that the furnace body is in static pressure detection for a long time.
2. The method for using the device for automatically dredging the static pressure pipeline of the blast furnace body on line according to claim 1, which is characterized in that: the device also comprises a computer, an air pressure sensor is arranged in the static pressure pipeline of the furnace body, the air pressure sensor, the air cylinder (1) and the motor (2) are all connected with the computer, and a threshold value for controlling the operation of the air cylinder (1) and the motor (2) is arranged in the computer.
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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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| 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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| CN111438144B true CN111438144B (en) | 2024-03-08 |
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