KR101862775B1 - Device for measuring pressure in furnace - Google Patents

Abstract

Provided is a device for measuring pressure in a furnace, which can quickly resolve a blocking phenomenon of the device for measuring pressure during operation, and comprises: a pressure pipe for measuring pressure, which is inserted into and installed in an opening penetrating and formed in a furnace wall of a furnace; a housing installed at an external side of the furnace, and connected to the opening; a supply unit selectively coupled to a front end of the housing to remove a conventional pressure pipe, and supplying a new pressure pipe to the opening; and a fixing unit installed in the opening to fixate the pressure pipe to the opening.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for measuring a pressure in a blast furnace,

The present invention relates to a blast furnace pressure measuring device for measuring a blast furnace internal pressure for grasping a blast furnace internal condition.

Generally, a blast furnace is a high-temperature and high-pressure reactor which produces molten iron by reducing the iron ore charged in the furnace by hot air supplied from the bottom.

A pressure measuring device for detecting the internal pressure of the blast furnace in each circumferential direction of the furnace body is provided in order to detect a change in the gas flow passing through the charge in the blast furnace operation.

In the blast furnace pressure measuring device, a pressure pipe in the form of a pipe communicating with the inside of the blast furnace is installed on the sidewall of the blast furnace, nitrogen is injected into the injection pipe connected to the pressure pipe to prevent dust backflow or moisture penetration into the blast furnace, And is in a purge manner.

During the furnace reduction reaction during the normal operation of the blast furnace, a phenomenon occurs in which the pressure tube is clogged by gas, dust, low melting point material, pulverized coal or the like. If the pressure tube is blocked, pressure detection will not be possible.

If the pressure tube is clogged, it should be pierced immediately, but it is difficult to dismantle or open the pressure tube due to the internal pressure of the blast furnace reaching 2 to 4 kg / ㎠ during normal operation.

Therefore, in the past, after waiting for the blast furnace to stop at a stoppage period such as regular repairs, the opening of the pressure pipe is performed, so that accurate data can not be obtained for a long time from clogging of the pressure pipe to opening. Further, since the operation of opening the pressure pipe is performed by using the manual penetrator, there is a problem that the operation is inconvenient.

Provided is a blast furnace pressure measuring device capable of quickly eliminating clogging even when operating in the event of clogging of the pressure measuring device.

Further, the present invention provides a blast furnace pressure measuring device capable of simplifying and simplifying the clogging phenomenon.

The measuring apparatus of the present embodiment includes: a pressure measuring pressure tube inserted into an opening formed through a wall of a furnace; a housing provided outside the blast furnace and connected to the opening; a pressure tube selectively removably coupled to the housing front end, A supply part for supplying a new pressure pipe to the opening, and a fixing part for fixing the pressure pipe to the opening part.

The supply unit may include a supply pipe coupled to an outer end of the housing and having a new pressure pipe therein, and a drive cylinder installed in the supply pipe to push a new pressure pipe into the opening.

The supply unit may further include a supply port connected to one side of the supply pipe to supply an inert gas into the housing through the supply pipe, and a gas supply source connected to the supply port to supply the inert gas.

And a shutoff valve installed at the outer end of the housing to shut off the housing.

An inner stopper member protruding into the opening to allow the inner end of the pressure tube to be caught, an outer stopper member protruding into the opening and adapted to be caught by the outer end of the pressure tube, a hooking state of the inner stopper member and the outer stopper member And a releasing unit for selectively releasing the releasing member.

Wherein the release portion comprises a first link which is provided so as to be seetable in a space formed in the outer periphery of the opening and in which the outer stopper member is provided at a front end thereof and a second link And a connection link connecting between adjacent free ends of the first link and the second link.

The outer stopper member may be a structure having a wedge-shaped sloped surface whose thickness gradually decreases toward the outside.

As described above, according to the present embodiment, the blockage of the pressure pipe is solved immediately during the steady operation of the blast furnace, so that accurate in-furnace data can be ensured continuously, and the blast furnace operation capability can be improved through such accurate data.

Further, by simply pushing the pressure tube itself which has been clogged, it is possible to remarkably shorten the working time and to perform the piercing operation more easily compared with a preexisting work such as piercing or dugging a clogged pipe line.

Further, since the newly supplied pressure pipe is more firmly seated and fixed in the notch opening, it is possible to prevent the loss of the newly supplied pressure pipe and perform more accurate pressure measurement.

1 is a schematic view showing a pressure measuring device installed in a blast furnace according to the present embodiment.
2 is a sectional view of the blast furnace pressure measuring apparatus according to the present embodiment.
FIG. 3 is a schematic view showing a state in which the pressure tube is replaced in the blast furnace pressure measuring apparatus according to the present embodiment.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Hereinafter, the embodiment will be described as an example of an apparatus for measuring the internal pressure of a blast furnace installed in a blast furnace. The present device is not limited to the blast furnace but applicable to other melting furnaces in addition to the blast furnace.

1 and 2 schematically show a pressure measuring apparatus installed in a blast furnace according to the present embodiment.

As shown in FIG. 1, the pressure measuring apparatus of the present embodiment is installed on the side of the blast furnace 100 to detect the internal pressure of the blast furnace.

For measuring the internal pressure of the blast furnace, a pressure measuring pressure pipe (22) is installed in the opening (110) formed through the furnace wall of the blast furnace (100). The opening 110 is a hole formed to penetrate the furnace wall through which the pressure pipe is inserted. The pressure pipe (22) is a pipe structure having a through hole formed therein so as to communicate with the inside of the blast furnace.

A housing 10 is provided on the outside of the blast furnace 100 so as to be connected to the opening 110 and communicates with the pressure pipe 22. A pressure measuring unit is provided on the housing 10 to detect the pressure inside the blast furnace.

In the following description, the inside refers to the inside of the blast furnace along the x-axis direction in Fig. 1, and the outside refers to the outside toward the blast furnace, which is the opposite direction. Also, the upper side means the upper direction of the blast furnace along the y axis direction, and the opposite direction is called the lower side.

A gas injection pipe 12 for supplying a pressure measuring gas is installed on one side of the housing 10. The gas injection pipe may be provided with a pressure gauge and a flow meter for detecting the pressure and the flow rate of the supplied gas.

The housing (10) has an empty cylindrical structure, and its inner end is provided in the blast furnace body and communicates with the pressure pipe (22). A shutoff valve (14) for selectively shutting the tip of the housing (10) is provided at an outer tip of the housing (10). The shut-off valve 14 is applicable to all of the structural surfaces that open and close the channel of the housing 10. 1, the shut-off valve may be a structure in which the shut-off valve slides inside the housing 10 to open and close the channel.

In the pressure measuring apparatus having the above-described structure, in the present embodiment, when the pressure pipe 22 provided in the blast hole 110 is blocked or damaged, a new pressure pipe 24 is pushed into the opening 110, And a new pressure tube is seated on the opening 110. Hereinafter, for convenience of explanation, a conventional pressure tube provided in the opening 110 is referred to as an old pressure tube 22, and a pressure tube newly inserted into the opening 110 is referred to as a new pressure tube 24. The pressure tube can refer to both the old pressure tube and the new pressure tube.

To this end, the present embodiment includes a supply part 30 selectively connected to the front end of the housing 10 to remove a conventional pressure pipe 22 and supply a new pressure pipe 24 to the opening 110, And a fixing unit 40 installed at the opening 110 for fixing the pressure tube to the opening 110.

The supply unit 30 includes a supply pipe 32 coupled to the outer end of the housing 10 and equipped with a new new pressure pipe 24, a new new pressure pipe 24 installed in the supply pipe 32, (Not shown).

The distal ends of the supply pipe 32 and the housing 10 may be formed to be fastenable to each other. For example, the supply pipe 32 and the front end of the housing 10 may be fastened together by a screw fastening method or a one-touch fastening method. The supply pipe (32) may be coupled to the housing (10) with a packing provided at a joint portion with the tip of the housing (10) to maintain airtightness. Accordingly, it is possible to prevent the outflow of gas through the gap between the supply pipe 32 and the housing 10.

The supply pipe (32) is open at its tip and extends long, and a new pressure pipe (24) is inserted therein. A driving cylinder 34 is connected to an end of the supply pipe 32. The drive cylinder 34 may be a pneumatic cylinder driven by air. The piston rod 35 of the drive cylinder 34 is positioned inside the supply pipe 32 so as to push the outer tip of the new pressure pipe 24 to move it. Accordingly, when the drive cylinder 34 is extended, the piston rod 35 is moved and the new pressure tube 24 is pushed and moved outward through the tip of the supply pipe 32.

Therefore, as shown in FIG. 3, the new pressure pipe 24 pushed by the piston rod presses the old pressure pipe 22 installed in the opening 110 and pushes it. The old pressure pipe 22 is pushed by the new pressure pipe 24 and the old pressure pipe 22 is removed from the opening 110 and the new pressure pipe 24 is inserted into the opening 110.

Thus, by simply pushing the new pressure pipe 24 through the supply pipe 32, the old pressure pipe 22 can be removed from the opening 110 and the new pressure pipe 24 can be newly installed.

The present embodiment is characterized in that the supply pipe 32 is connected to one side of the supply pipe 32 through the supply pipe 32 in order to protect the supply unit 30 from the high temperature blast furnace gas in the process of inserting the new pressure pipe 24 through the supply pipe 32 10), and a gas supply source 38 connected to the supply port 36 for supplying an inert gas. In this embodiment, the inert gas may be nitrogen gas.

The nitrogen gas supplied from the gas supply source 38 is supplied into the supply pipe 32 through the supply port 36 and filled in the supply pipe 32. This makes it possible to sufficiently protect the supply tube 32 and the drive cylinder 34 provided at the rear end of the supply tube 32 from the high-temperature blast furnace gas applied during the replacement of the new pressure tube 24.

The fixing part 40 supports the new pressure pipe 24 inserted into the opening 110 and fixes the pressure pipe 24 in the opening 110.

In this embodiment, the fixing portion 40 includes an inner stopper member 42 protruding into the opening 110 and adapted to catch the inner tip of the pressure tube, an outer stopper member 42 protruding into the opening 110, An outer stopper member 44 to be engaged and a release portion for selectively releasing the engagement state of the inner stopper member 42 and the outer stopper member 44. [

The inner stopper member (42) and the outer stopper member (44) have a structure in which a step is formed so that the tip of the pressure pipe is caught on the surface facing the pressure pipe front end. The inner stopper member 42 and the outer stopper member 44 are protruded into the opening 110 so that the pressure tube located at the opening 110 is inserted into the inner stopper member 42 and the outer stopper member 44 .

The inner stopper member 42 and the outer stopper member 44 are disposed in a predetermined space 46 provided at the outer periphery of the opening 110 of the furnace wall. The space 46 may be formed at a lower portion of the opening 110, as shown in FIG. The space 46 can be understood as an area in which the inner stopper member 42, the outer stopper member 44, and the release portion are provided in the lower portion of the opening 110.

The inner stopper member 42 and the outer stopper member 44 protruding into the opening 110 can maintain the state where the pressure tube can not be released from the opening 110 to the outside.

Here, the outer stopper member 44 may be a structure having a wedge-shaped inclined surface 48 whose thickness gradually decreases toward the outside. That is, as shown in Fig. 2, the upper surface of the outer stopper member 44 forms the downward inclined surface 48. As shown in Fig. This allows the new pressure tube 24 to be moved to easily pass the outer stopper member 44 along the inclined surface 48 without being caught by the outer stopper member 44.

The releasing portion is configured to release the retaining state of the old pressure pipe 22 supported in the opening 110 when the new pressure pipe 24 is inserted so that the new pressure pipe 24 can be inserted into the opening 110 .

3, the release portion includes a first link 50 provided in the space 46 formed in the outer circumferential portion of the opening 110 so as to be seesawed and having the outer stopper member 44 provided at the front end thereof, A second link 52 installed in the space 46 so as to perform a seesaw motion and provided with an inner stopper member 42 at a tip thereof and a second link 52 provided adjacent to the first link 50 and the second link 52 And a connecting link 54 connecting the free ends.

The first link 50 is a bar structure disposed on the outer side of the opening 110 and extending along the opening 110. The intermediate portion of the first link 50 is coupled with the hinge shaft 51 in the space 46 so that the first link 50 is seated on the hinge axis. An outer stopper member (44) is provided at the outer end of the first link (50). Accordingly, when the outer stopper member 44 moves up and down, the first link 50 moves about the hinge shaft 51 to perform a seesaw motion.

The second link 52 is a bar structure disposed on the inner side of the opening 110 and extending along the opening 110. The middle portion of the second link 52 is coupled with the hinge shaft 53 in the space 46 so that the second link 52 is seated on the hinge axis. An inner stopper member (42) is provided at the inner front end of the second link (52). Accordingly, when the second link 52 performs seesaw motion about the hinge shaft 53, the inner stopper member 42 moves up and down.

The connection link 54 is axially coupled between an inner free end of the first link 50 extending toward the inside of the blast furnace and an outer free end of the second link 52 extending toward the outside of the blast furnace. The first link 50 and the second link 52 extend a sufficient length from each other so that the free ends of the first link 50 and the second link 52 overlap with each other. A connecting link 54 is vertically disposed and axially coupled.

The first link 50 and the second link 52 are linked through the connection link 54. When the first link is seesawed, the movement of the first link 50 and the second link 52 is transmitted through the connection link 54 And then transmitted to the second link 52 to move the second link 52 interlocked.

The first stopper member 42 and the second stopper member 44 are coupled to each other so that the center of gravity of the first stopper member 42 and the second stopper member 44 are offset toward the connection link 54, And the tip of the side of the connecting link 54 is held down. The outer stopper member 44 and the inner stopper member 42 provided at the opposite ends of the first link 50 and the second link 52 on the side opposite to the connection link 54 side are lifted upwards and the openings 110 And the protruded state is maintained.

In this way, when an external force is not applied to the release portion, the outer stopper member 44 and the inner stopper member 42 rise naturally to the inside of the inner circumferential portion to serve as a stopper against the pressure tube disposed in the opening 110 .

3, when the new pressure pipe 24 is moved from the supply unit 30 to the opening 110, the outer stopper member 44 located on the outer side of the opening 110 is moved It is pressed down by the pressure tube 24 and descends downward. The outer stopper member 44 is pushed to cause the first link 50 to perform a seesaw motion around the hinge axis 51 to lift the connecting link 54 connected to the free end of the first link 50. Thus, the free end of the second link 52 connected to the connection link 54 is pulled up. The free end of the second link 52 is moved upward so that the second link 52 seesaw around the hinge shaft 53 and the inner tip of the second link 52 moves downward. Therefore, the inner stopper member 42 provided at the inner front end of the second link 52 is moved downward within the opening 110. The clamping state closing the tip of the old pressure pipe 22 is released as the inner stopper member 42 protruding into the opening 110 moves into the space 46 from the opening 110. [ Accordingly, the old pressure pipe 22 can move into the blast furnace at the opening 110, and can be pushed by the pressure of the new pressure pipe 24 to move into the blast furnace.

The old pressure pipe 22 pushed by the moved new pressure pipe 24 is removed from the opening 110 to the inside of the blast furnace and removed and the new pressure pipe 24 is newly installed in the opening 110. When the new pressure pipe 24 is completely inserted into the opening 110 through the inner stopper member 42, the inner stopper member 42 pressed by the new pressure pipe 24 is moved upward and protruded into the opening 110 The outer end of the new pressure pipe 24 is fixed by being hooked. The inner stopper member 42 is also protruded into the opening 110 while the old pressure tube 22 is completely pushed out of the opening 110 and dropped inside the blast furnace to fix the inner tip of the new pressure pipe 24 by hanging.

As described above, the inner stopper member 42 and the outer stopper member 44 are fixed by sealing both ends of the newly installed new pressure pipe 24 to prevent the flow of the newly installed new pressure pipe 24 in the opening 110 The fixed state can be stably maintained.

Hereinafter, the operation of the apparatus for eliminating the clogging of the pressure pipe will be described.

In the normal operating condition, the pressure tube is not blocked and the gas flows smoothly and the pressure measurement is normally performed.

In this state, when the pressure tube is clogged by pulverized coal or a low melting point material in the blast furnace, the apparatus is operated to remove the clogged pressure tube immediately after the operating state and insert a new pressure tube so as to immediately solve the clogging phenomenon.

The supply pipe 32 is installed at the outer end of the housing 10 in order to remove the old pressure pipe 22 installed in the opening 110 and install the new pressure pipe 24. [ The shutoff valve provided in the housing 10 is closed before the supply pipe 32 is installed. Then, nitrogen gas is supplied through a supply port 36 provided in the supply pipe 32 to fill the inside of the supply pipe 32 with nitrogen gas. In this state, the shutoff valve is opened and the drive cylinder 34 is extended to push the new pressure pipe 24 provided in the supply pipe 32 into the opening 110.

The piston rod 35 is moved in accordance with the extension operation of the drive cylinder 34 and the new pressure tube 24 is pushed by the opening 110 and moved. 3, the old pressure pipe 22 installed in the opening 110 is pushed by the new pressure pipe 24 as the new pressure pipe 24 is moved, . As the new pressure pipe 24 moves, the outer stopper member 44 protruding into the opening 110 is lowered and the first link 50 and the connecting link 54 And the second link 52, so that the inner stopper member 42 is also lowered. Thus, the engagement state of the old pressure pipe 22 is released, so that the old pressure pipe 22 can be pushed by the new pressure pipe 24 to move inside the blast furnace.

As the new pressure pipe 24 continues to be pushed into the opening 110, the old pressure pipe 22 is continuously pushed into the blast furnace and eventually falls into the blast furnace 110 from the opening 110. Then, the new pressure pipe 24 is completely inserted into the opening 110 to replace the old pressure pipe 22.

When the insertion of the new pressure tube 24 is completed, the drive cylinder 34 contracts again, and the replacement tube can be removed from the housing 10 to complete the replacement operation.

As described above, the pressure tube closed by the pipe is immediately removed and the new pressure tube is quickly replaced, so that the clogging of the pressure tube can be easily solved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

10: housing 14: shut-off valve
22: Old pressure tube 24: New pressure tube
30: supply part 32: supply pipe
34: drive cylinder 35: piston rod
36: supply port 38: gas supply source
40: fixing part 42: inner stopper member
44: outer stopper member 46: space
48: slope 50: first link
51, 53: hinge shaft 52: second link
54: connection link

Claims (7)

A pressure tube for pressure measurement which is inserted into an opening formed through the wall of the furnace wall,
A housing installed outside the blind hole and connected to the opening,
A supply part selectively coupled to the front end of the housing to remove an existing pressure pipe and supply a new pressure pipe through the opening,
And a fixing portion provided in the opening to fix the pressure tube to the opening,
An inner stopper member protruding into the opening to allow the inner end of the pressure tube to be caught; an outer stopper member protruding into the inner surface of the opening to hook the outer end of the pressure pipe; And a releasing section for selectively releasing the state. The method according to claim 1,
Wherein the supply portion includes a supply pipe coupled to an outer end of the housing and having a new pressure pipe therein, and a drive cylinder installed in the supply pipe to push a new pressure pipe into the opening. 3. The method of claim 2,
Wherein the supply unit further includes a supply port connected to one side of the supply pipe for supplying an inert gas into the housing through the supply pipe, and a gas supply source connected to the supply port to supply the inert gas. The method of claim 3,
And a shutoff valve installed at an outer end of the housing to shut off the housing. delete 5. The method according to any one of claims 1 to 4,
Wherein the release portion comprises a first link which is provided so as to be seetable in a space formed in the outer periphery of the opening and in which the outer stopper member is provided at a front end thereof and a second link And a connecting link connecting between adjacent free ends of the first link and the second link. The method according to claim 6,
Wherein the outer stopper member has a wedge-shaped inclined surface whose thickness gradually decreases toward the outside.

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