CN112795715B - Method for recovering breakage and rollover of small bell pull rod of blocking valve of blast furnace gravity dust collector - Google Patents
Method for recovering breakage and rollover of small bell pull rod of blocking valve of blast furnace gravity dust collector Download PDFInfo
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- CN112795715B CN112795715B CN202011491375.4A CN202011491375A CN112795715B CN 112795715 B CN112795715 B CN 112795715B CN 202011491375 A CN202011491375 A CN 202011491375A CN 112795715 B CN112795715 B CN 112795715B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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Abstract
A method for recovering breakage, rollover and turnover of a small bell pull rod of a blocking valve of a blast furnace gravity dust collector belongs to the field of installation and maintenance of metallurgical equipment. The technical scheme is as follows: a. fixing the blocking valve at the big bell position: connecting a hoop on a pull rod of the blocking valve with a big bell of the blocking valve by using a steel wire rope, and lifting the big bell above the manhole position; b. adjusting the inclination direction of the blocking valve bell: connecting the anchor ear with a hook of the small bell of the blocking valve by using another steel wire rope, and enabling the steel wire rope to drive the small bell to reversely rotate to the position opposite to the manhole; c. and (3) recovering the small clock to a normal state: connecting the hoop and the small bell by using a steel wire rope, and continuously reversing the small bell to the central position; d. fixing the big and small clocks inside the interrupter valve: the hoop is replaced by descending the pull rod, a new small bell pull rod is installed, and the small bell pull rod and the special-shaped bolt are fixed by the butt joint connecting pin shaft through the lifting of the pull rod. The method can conveniently and quickly recover the small blocking valve clock, save 50% of maintenance time, reduce labor consumption, improve the working efficiency by 2 times, and is safe and efficient.
Description
Technical Field
The invention relates to a method for recovering breakage and rollover of a small bell pull rod of a blocking valve of a blast furnace gravity dust collector, belonging to the technical field of installation and maintenance of blast furnace iron-making equipment.
Background
The gravity dust collector is a coal gas coarse dust collecting device in the blast furnace ironmaking production process, and the dust collecting efficiency is more than 85 percent. A gas blocking valve is arranged in the gravity dust collector and used for cutting off a gas passage between a gas pipeline at the side of the blast furnace body and a gas pipeline at the back of the gravity dust collector when the blast furnace stops blowing, so that gas in the gas pipeline at the back of the gravity dust collector and a gas pipe network of the blast furnace is prevented from flowing back into the gas pipeline at the side of the blast furnace body, and the blast furnace gas poisoning accident of operating personnel in the blowing-down and maintenance processes of the blast furnace is prevented. The gas shutoff valve is structured as shown in fig. 1. When the gas shutoff valve normally works, the big clock and the small clock in the shutoff valve body respectively obstruct gas, namely, the big clock and the small clock on the upper layer and the lower layer seal the gas twice, so that a better sealing effect can be achieved, and the circulation of the gas is blocked. However, when the lower-layer bell pull rod is broken due to long-term use or improper operation of equipment, so that the small bell body has a rollover fault, the shut-off valve cannot effectively block the flow of blast furnace gas after the shut-off valve is closed, and the blast furnace gas poisoning accident of operators in the blast furnace damping-down maintenance process is easy to happen, and the shut-off valve needs to be maintained in time.
The blast furnace gravity dust collector is a limited space, and blast furnace gas is stored inside the blast furnace gravity dust collector. When repairing the shut-off valve in the gravity dust collector of blast furnace, the blast furnace gas in the dust collector needs to be removed, i.e. inert gas-N is used firstly2Or Ar gas replaces blast furnace gas in the gravity dust collector, and after the blast furnace gas is removed, the N gas in the dust collector is replaced by air2Or Ar, and O in compliance with safety regulations2After the concentration, a maintenance operator can enter the gravity dust collector to perform maintenance operation on the blocking valve. If CO or O is assayed during the gas replacement process due to out-of-specification operation or testing2The content is deviated, so that maintenance personnel entering the dust remover easily have gas poisoning or asphyxiation casualty accidents, and great potential safety hazards exist. Therefore, a method for recovering the reset of the small clock body needs to be designed, so that the operation mode of a maintenance operator in the gravity dust collector is changed, the operation time of the maintenance operator in the gravity dust collector is shortened, and potential safety hazards are eliminated.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a method for recovering the broken and tilted small bell pull rod of the blocking valve of the gravity dust collector of the blast furnace, so that the operation mode of entering the gravity dust collector by maintenance personnel is changed, the staying time of the operation personnel in the dust collector is shortened, and the potential safety hazard is eliminated.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for recovering breakage and rollover of a small bell pull rod of a blocking valve of a blast furnace gravity dust collector comprises the following operation steps:
a. fixing the blocking valve at the big bell position: after the other ends of the two steel wire ropes are respectively connected with a second lifting lug and a first lifting lug of the large bell of the blocking valve, lifting the pull rod to separate the pull rod from the large bell and drive the large bell to rise above the manhole position;
b. adjusting the inclination direction of the blocking valve bell: one end of a third steel wire rope is fixed on the hoop, the other end of the third steel wire rope passes through a gap between the large bell and the inner wall of the dust remover and is connected with the second lifting lug of the small bell, and the pull rod is lifted to enable the third steel wire rope to drive the small bell to reversely rotate to the position, corresponding to the first lifting lug of the small bell, the second lifting lug of the small bell and the manhole, of the small bell;
c. and (3) recovering the small clock to a normal state: one end of a fourth steel wire rope is fixedly connected with the hoop, and the other end of the fourth steel wire rope penetrates through a pull rod hole of the big bell to be connected with a first lifting lug of the small bell; one end of a fifth steel wire rope is connected with the second lifting lug of the small bell, and the other end of the fifth steel wire rope is fixed outside the manhole; after the third steel wire rope is disconnected, the pull rod is lifted and the fifth steel wire rope is loosened, so that the bell continues to rotate reversely to a normal state.
d. Fixing the big and small clocks inside the interrupter valve: and descending the pull rod, replacing the hoop, installing a new small clock pull rod, and connecting the small clock pull rod with the small clock.
In the step a, the lengths of the first steel wire rope and the second steel wire rope are 0.3-1.5 meters longer than the lengths from the hoop to the broken part of the pull rod.
In the step c, the other end of the fifth steel wire rope is connected with a hand-operated block outside the manhole.
According to the method for recovering the breakage and the rollover of the small bell pull rod of the blocking valve of the blast furnace gravity dust collector, the small bell pull rod is fixedly connected with the small bell through the small bell cross shaft and the bolt.
In the method for recovering the breakage and rollover of the small bell pull rod of the blocking valve of the blast furnace gravity dust collector, in the step (1), the lengths of the first steel wire rope 15 and the second steel wire rope 17 are 0.3-1.5 meters longer than the lengths from the hoop 2 to the breakage position of the pull rod 1.
In the method for recovering the breakage, the rollover and the breakage of the small bell pull rod of the blocking valve of the blast furnace gravity dust collector, in the step (3), the other end of the fifth steel wire rope 18 is connected with the hand-operated block 19 outside the manhole 5.
The invention has the beneficial effects that: the operation method can conveniently and quickly recover the small bell of the blocking valve to a normal working state, greatly shortens the operation time of maintenance personnel in the gravity dust collector, and greatly reduces the gas poisoning or N generation of the maintenance personnel2The occurrence of the suffocation safety accident saves 50 percent of maintenance time, reduces the labor amount, improves the working efficiency by 2 times, and is safe and efficient.
Drawings
FIG. 1 is a schematic view of a shut-off valve configuration;
FIG. 2 is a schematic view of the shut-off valve in an accident situation;
FIG. 3 is a schematic view of a small clock in a hoisting state;
FIG. 4 is a schematic view of a small clock in a hoisting state;
FIG. 5 is a small clock reset diagram;
in the figure: 1. the novel dust remover comprises a pull rod, a hoop, a large clock first lifting lug, a manhole, a valve seat, a small clock first lifting lug, a small clock cross shaft, a small clock second lifting lug, a large clock second lifting lug, a small clock pin shaft, a dust remover shell, a third steel wire rope, a first steel wire rope, a fourth steel wire rope, a second steel wire rope, a fifth steel wire rope and a manual hoist, wherein the hoop is 2, the large clock first lifting lug is 3, the large clock first lifting lug is 4, the manhole is 5, the valve seat is 6, the small clock first lifting lug is 7, the small clock cross shaft is 8, the small clock cross shaft is 9, the small clock second lifting lug is 10, the large clock second lifting lug is 11, the small clock second lifting lug is 12, the small clock pin shaft is 13, the dust remover shell is 14, the third steel wire rope, the first steel wire rope is 15, the fourth steel wire rope is 16, the second steel wire rope is 17, the fifth steel wire rope is 18, and the manual hoist is 19.
Detailed Description
The present invention will be described in more detail below by way of examples with reference to the accompanying drawings.
Example 1: the normal operating state of the interrupter valve is shown in fig. 1. Referring to fig. 2, when the breakage accident of the pull rod of the interrupter valve occurs, the bell is tilted. The method for recovering the breakage, the rollover and the rollover of the small bell pull rod of the blocking valve of the blast furnace gravity dust collector in the embodiment comprises the following steps: one ends of a first steel wire rope 15 and a second steel wire rope 17 are fixedly connected with the hoop 2, the other ends of the two steel wire ropes are connected with a second lifting lug 11 and a first lifting lug 4 on the big clock 3, the winch is used for driving the pull rod 1 to lift the big clock 3 to exceed the position of the manhole 5, and a third steel wire rope 14 penetrates through a gap between the big clock and the inner wall of the dust remover to connect the hoop 2 with a second lifting lug 10 of the small clock, as shown in figure 3. And then the pull rod 1 is lifted to enable the small bell 9 to rotate to the position shown in the figure 4, a fourth steel wire rope 16 penetrates through a pull rod hole of the large bell, the hoop 2 is connected with the first lifting lug 7 of the small bell, meanwhile, the second lifting lug 10 of the small bell is connected with the chain block 19, as shown in the figure 4, the chain block is slowly loosened along with the lifting of the pull rod, and the small bell is enabled to continuously turn over to the right position, as shown in the figure 5.
Example 2: the operation method of the embodiment is to wind and fix the middle part of the first steel wire rope 15 on the hoop 2, and then connect the two ends of the first steel wire rope 15 with the first big-bell lifting lug 4 and the second big-bell lifting lug 11 on the big bell 3 respectively. That is, the first wire rope 15 and the second wire rope 17 in embodiment 1 are integrated, and the operation is facilitated. Then, a winch is used for driving the pull rod 1 to pull the bell 3 to a position exceeding the manhole 5, the hoop 2 is connected with the second lifting lug 10 of the small bell by a third steel wire rope 14 along the gap between the bell and the inner wall of the dust remover, as shown in figure 3, the small bell 9 is rotated to the position shown in figure 4 by lifting the pull rod 1, the hoop 2 is connected with the first lifting lug 7 of the small bell by a fourth steel wire rope 16 through a pull rod hole of the bell, meanwhile, a chain block 19 is connected with the second lifting lug 10 of the small bell, as shown in figure 4, the chain block is slowly loosened by lifting the pull rod to enable the small bell to continuously turn over to the position as shown in figure 5.
Claims (4)
1. A method for recovering breakage and rollover of a small bell pull rod of a blocking valve of a blast furnace gravity dust collector is characterized by comprising the following operation steps:
a. fixing the blocking valve at the big bell position: after one ends of a first steel wire rope (15) and a second steel wire rope (17) are fixedly connected with the hoop (2) and the other ends of the two steel wire ropes are respectively connected with a second lifting lug (11) and a first lifting lug (4) of the blocking valve bell, the pull rod (1) is lifted, the pull rod (1) is separated from the bell (3), and the bell is driven to rise above the position of the manhole (5);
b. adjusting the inclination direction of the blocking valve bell: one end of a third steel wire rope (14) is fixed on the hoop (2), the other end of the third steel wire rope passes through a gap between the large bell (3) and the inner wall of the dust remover and is connected with the second lifting lug (10) of the small bell, and then the pull rod (1) is lifted to enable the third steel wire rope (14) to drive the small bell (9) to reversely rotate to the relative positions of the first lifting lug (7) of the small bell, the second lifting lug (10) of the small bell and the manhole (5);
c. and (3) recovering the small clock to a normal state: one end of a fourth steel wire rope (16) is fixedly connected with the hoop (2), and the other end of the fourth steel wire rope penetrates through the draw bar hole of the big bell to be connected with the first lifting lug (7) of the small bell; one end of a fifth steel wire rope (18) is connected with the second lifting lug (10) of the small bell, and the other end of the fifth steel wire rope is fixed outside the manhole (5); after the third steel wire rope (14) is disconnected, the pull rod (1) is lifted, the fifth steel wire rope (18) is loosened, and the small bell is continuously reversed to a normal state;
d. fixing the big and small clocks inside the interrupter valve: the pull rod (1) is descended, the anchor ear (2) is replaced, a new small clock pull rod is installed, and the anchor ear is connected with the small clock (9).
2. The method for recovering the breakage and the rollover of the bell pull rod of the blast furnace gravity dust collector interrupter valve according to claim 1, wherein in the step a, the lengths of the first steel wire rope (15) and the second steel wire rope (17) are 0.3 to 1.5 meters longer than the lengths from the hoop (2) to the breakage of the pull rod (1).
3. The method for recovering from the breakage and the rollover of the bell pull rod of the interrupter valve of the blast furnace gravity dust collector according to claim 1 or 2, characterized in that, in the step c, the other end of the fifth wire rope (18) is connected with a hand-operated block (19) outside the manhole (5).
4. The method for recovering the breakage and the rollover of the small bell pull rod of the blast furnace gravity dust collector interrupter valve according to claim 1 or 2, characterized in that the small bell pull rod and the small bell are fixedly connected by a small bell cross shaft (8) and a special-shaped bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491375.4A CN112795715B (en) | 2020-12-16 | 2020-12-16 | Method for recovering breakage and rollover of small bell pull rod of blocking valve of blast furnace gravity dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491375.4A CN112795715B (en) | 2020-12-16 | 2020-12-16 | Method for recovering breakage and rollover of small bell pull rod of blocking valve of blast furnace gravity dust collector |
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| Publication Number | Publication Date |
|---|---|
| CN112795715A CN112795715A (en) | 2021-05-14 |
| CN112795715B true CN112795715B (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011491375.4A Active CN112795715B (en) | 2020-12-16 | 2020-12-16 | Method for recovering breakage and rollover of small bell pull rod of blocking valve of blast furnace gravity dust collector |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0285310A (en) * | 1988-09-19 | 1990-03-26 | Sumitomo Metal Ind Ltd | Method for removing dust in blast furnace gas |
| CN101684506B (en) * | 2008-09-27 | 2011-01-19 | 上海梅山钢铁股份有限公司 | Dust removing system and processing method of blast furnace raw gas |
| CN103122400A (en) * | 2013-03-14 | 2013-05-29 | 中冶赛迪工程技术股份有限公司 | Blast furnace gas dust removal device |
| CN104878146B (en) * | 2015-06-09 | 2017-03-22 | 中国十九冶集团有限公司 | Construction method for replacing ripple compensator on top of gravitational dust collector |
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- 2020-12-16 CN CN202011491375.4A patent/CN112795715B/en active Active
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