KR20170010265A

KR20170010265A - Dust hood

Info

Publication number: KR20170010265A
Application number: KR1020150101725A
Authority: KR
Inventors: 김진현; 백정동; 김완주
Original assignee: 주식회사 포스코
Priority date: 2015-07-17
Filing date: 2015-07-17
Publication date: 2017-01-26

Abstract

The dust-collecting hood according to the present invention comprises: a pipe through which dust-mixed air is conveyed; And a control unit for controlling the cross-sectional area of the upper area of the pipe inside the pipe so as to locally improve the speed of the air delivered in the lower area of the pipe, Lt; / RTI >

Description

Dust hood {DUST HOOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dust collecting hood, and more particularly, to a dust collecting hood capable of removing accumulated dust on the bottom of a duct for transferring dust-mixed air to a dust collector.

Generally, since the fine powder such as coke pulverized coal or sludge causes environmental pollution, a separate dust collecting device is installed to filter the contaminated air and discharge it to the outside.

For this purpose, air is sucked by a pump or the like. When a bent portion is formed in a hood, which is a path through which dust is passed, a flow of air slows at the corresponding portion and dust accumulates.

Figs. 1 and 2 show a state in which dust D is deposited on the conventional dust collecting hood 1 as described above. Particularly, deposition is concentrated at a position immediately before the upward bent portion shown on the right side of FIG. 2, and a structure for preventing this deposition concentration portion is necessary.

If the dust is deposited intensively on a specific site in the hood, the cross-sectional area of the dust collecting hood may be narrowed due to adhesion of the dust, or fire may occur if the dust is an ignitable substance such as pulverized coal.

Conventionally, a dust collecting prevention device (Korean Patent Laid-Open Publication No. 10-2013-0062630 (June 23, 2013)), a dust accumulation prevention device in a low dust collecting duct (Korean Patent Laid-Open No. 10-2001-0061568 ) "Is known as a technique for removing dust deposited in the dust collecting hood.

However, the apparatus for preventing clogging of the dust path can reduce the particle diameter of the dust by the crushing action through the shaft and the gear, but there is a problem that they can not be prevented from being deposited on the floor inside the hood.

In addition, the dust accumulation prevention device in the low dust-collecting duct can prevent dust accumulation by forcibly transferring dust and air by installing a fan in the middle of the duct and rotating the fan. However, since the fan is fixedly installed, Due to the intervening nature of the structure, the fan has to be continuously rotated to maintain the flow rate, which is a waste of energy. In addition, since the dust can not be removed when the dust is deposited on the fan itself, there is also a problem that the dust can close the pipe around the fan.

Therefore, there is a demand for a dust-collecting hood having an eliminating function that does not act as a nucleus where dust is accumulated without effectively narrowing down the diameter of the tube while effectively removing dust accumulated in the inside of the hood.

Korean Patent Publication No. 10-2013-0062630 (June 23, 2013) Korean Patent Publication No. 10-2001-0061568 (Jul.

SUMMARY OF THE INVENTION The present invention has been conceived to solve such a problem, and an object of the present invention is to provide a dust collecting hood capable of temporarily narrowing the diameter of a pipe to increase a flow velocity and thereby scatter accumulated dust.

According to an aspect of the present invention, there is provided a dust-collecting hood comprising: a pipe through which a gas containing at least dust is delivered; Sectional area of the inside of the pipe installed in the pipe so as to locally increase the velocity of the gas transported in at least the lower region of the pipe so as to scatter dust deposited on the bottom of the pipe or to prevent deposition of dust. And an interrupting unit for controlling the interrupting unit.

The blocking unit includes a blocking plate that is rotatably installed on an upper surface of the inside of the pipe and adjusts a cross-sectional area of an upper region of the pipe, and a driving unit that rotates the blocking plate.

The blocking plate is inserted into a seating groove formed on an upper surface of the pipe when the pipe is completely opened, and is not interfered with air conveyed into the pipe.

Wherein the one end of the blocking plate is hinged to the inner upper surface of the pipe, and the driving unit includes: a cylinder provided on the upper side of the pipe; a cylinder connected to the cylinder and passing through the upper side of the pipe, And a load.

And guide grooves are formed on the upper surface of the blocking plate so that the ends of the rod are inserted and slid forward and backward.

Further comprising an extension portion rotatably coupled to an end of the rod and formed to be wider than the diameter of the rod and inserted into the guide groove, wherein the guide groove has a cross-sectional shape corresponding to the shape of the extension portion and the rod And when the blocking plate is rotated, the extension is fixed so as not to be detached.

A plurality of differential pressure gauges disposed apart from each other along the longitudinal direction of the pipe to measure the atmospheric pressure at each position, the blocking unit being disposed therebetween; And a control unit for receiving the atmospheric pressure information from the differential pressure gauge to determine whether the dust is deposited, and activating the blocking unit when dust is deposited.

Wherein the shielding units are disposed in a spaced relation to each other along the longitudinal direction of the pipe, the shielding unit and the differential pressure gauge are alternately arranged, and the control unit controls the shielding unit located behind the dust deposition- Thereby raising the air flow velocity at the position where the dust deposition is generated and scattering the dust.

The dust collecting hood according to the present invention has the following effects.

First, the dust can be smoothly transferred to the dust collector to improve the dust collecting efficiency.

Second, it is possible to prevent pressure drop, fire, clogging, and the like caused by deposition of dust on the dust collecting hood.

Third, if dust removal is not necessary, it does not interfere with the air flowing inside the pipe and does not impede the flow of air.

Fourth, since dust removal is performed only when a pressure rise due to dust deposition occurs, the burden on the pump for air flow is minimized.

1 is a front sectional view showing a state in which dust is deposited on a dust collecting hood,
Fig. 2 is a side sectional view showing a state in which dust is deposited on the upward bent portion of the dust collecting hood,
3 is a side sectional view showing a state of the dust-collecting hood in an opened state according to an embodiment of the present invention,
FIG. 4 is a side sectional view showing a state of the dust collecting hood in a closed state according to an embodiment of the present invention, FIG.
5 is a plan view of a shield plate according to an embodiment of the present invention,
6 is a perspective view illustrating a shielding unit according to an embodiment of the present invention,
7 is a simplified view showing a state in which a blocking unit and a differential pressure gauge are alternately installed in a dust collecting hood,
8 is a cross-sectional view illustrating a state in which a rod and an extension according to an embodiment of the present invention are inserted into a guide groove.

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.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Hereinafter, a dust collecting hood according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention comprises a tubular pipe 1 which can be seen as a main body of the dust collecting hood and a shielding unit 100 provided on the pipe 1 and capable of removing the accumulated dust D therefrom.

The pipe 1 is a path for conveying a mixture of gas and dust to a dust collector (not shown). In this embodiment, the pipe 1 is formed in a cylindrical shape having a circular inner diameter. Of course, the present invention is not necessarily limited to this, but it is also possible to apply the apparatus of the present invention even in the form of a rectangular duct in the form of a cross section, and the pipe may be replaced with, for example, a duct structure.

The gas may be ordinary air or various gases. That is, the type of the gas flowing inside can be changed depending on the environment in which it is used. In the present embodiment, the air is set as the air.

The blocking unit 100 locally increases the velocity of air delivered in the lower region inside the pipe 1 because it accumulates in the lower portion of the channel by gravity when the dust D is deposited. That is, when the flow rate of the air flowing to the lower portion of the pipeline is increased, the deposited dust D is scattered, and the deposited dust D is prevented from being deposited by the dust collector.

To this end, the blocking unit 100 is preferably operated to adjust the cross-sectional area of the upper region inside the pipe 1. [ More specifically, by cutting off the upper area inside the pipe 1, the cross-sectional area thereof is reduced.

More specifically, the blocking unit 100 includes a blocking plate 110 rotatably installed on the upper surface of the pipe 1 to adjust the sectional area of the upper area of the pipe, And a driving unit 120.

One side of the blocking plate 110 is coupled to the upper surface of the inside of the pipe 1 and is preferably coupled using a hinge shaft 111 so as to be rotatable.

The state in which the blocking plate 110 is disposed in parallel with the flow direction of air is referred to as an open position. When the blocking plate 110 is positioned at the open position, interference with air flowing inside the pipe 1 must be minimized. For this effect, it is preferable to form a concave groove having a shape corresponding to the shield plate 110 on the upper surface of the pipe 1. This will be referred to as a seating groove 300 for convenience.

3, when the blocking plate 110 is inserted into the seating groove 300, the air flowing into the pipe 1 flows on the surface of the blocking plate 110, It will not interfere.

The driving unit 120 includes a cylinder 121 provided on the upper side of the pipe 1 and a rod 122 connected to the cylinder 121 and passing through the upper side of the pipe 1 and contacting the upper surface of the blocking plate 110 .

As the rod 122 connected to the cylinder 121 and the cylinder 121 moves up and down, the blocking plate 110 contacting the end of the rod 122 moves up and down. At this time, since one end of the blocking plate 110 is coupled to the upper surface of the inside of the pipe 1, the other end of the blocking plate 110 moves around the one end of the blocking plate 110 while drawing a circle.

When the other end of the blocking plate 110 is lowered, the upper side of the pipe 1 is closed so that the air flows only to the lower side of the pipe 1. Since the flow velocity of the air flowing in the pipe 1 is inversely proportional to the cross-sectional area of the space through which the air passes, the velocity of the air flowing only to the lower side of the pipe 1 becomes higher. By accelerating the flow of air in this way, the dust D deposited on the bottom of the pipe 1 can be strongly scattered, and the scattered dust moves to the dust collector according to the flow of the air and is filtered.

That is, the deposition of the dust D inside the pipe 1 is prevented by the blocking plate 110 closing the upper side of the pipe 1.

A guide groove 112 is formed on an upper surface of the blocking plate 110 so that the end of the rod 122 is inserted and slid forward and backward. At this time, the extension 123 formed at the end of the rod 122 is inserted into the guide groove 112 As shown in FIG.

The rod 122 and the extension 123 are coupled in a T-shape. Likewise, the cross-section of the guide groove 112 is also formed in a T-shape so that the extension is inserted therein. The extended portion 123 is engaged with the guide groove 112 so that the blocking plate 110 can move up and down as the rod 122 moves up and down.

The extension part 123 connected to the end of the rod 122 can be integrally formed or detachably coupled. In the case of the integral type, the extended part 123 is inserted in the longitudinal direction of the guide groove 112, The rod 122 may be connected to the extended portion 123 inserted in the guide groove 112 in advance.

When the guide plate 110 is used without the guide groove 112 and the extension 123, it is also possible to return the blocking plate 110 to the open position by using an elastic body connecting the other end of the blocking plate 110 and the inner upper surface of the pipe 1 have.

In addition, a plurality of differential pressure gauges 200 and differential pressure gauges 200 are disposed apart from each other along the longitudinal direction of the pipe 1 to measure the atmospheric pressure at each position, And a controller (not shown) for operating the blocking unit 100 when it is determined that the dust is deposited.

The differential pressure gauge 200 is a kind of barometer, which is capable of measuring the atmospheric pressure at various positions and comparing the difference. The differential pressure gauge 200 is arranged before and after the blocking unit 100, that is, the longitudinal direction of the pipe, and the blocking unit 100 is disposed between the differential pressure gauges 200 to compare the front and rear air pressures of the blocking unit 100 .

If the front air pressure of the blocking unit 100 is higher than the rear air pressure, it can be deduced that dust is deposited in front of the blocking unit 100 and the sectional area of the pipe 1 is reduced. If it is determined that dust is deposited on the pipe 1, the control unit activates the blocking unit 100. More specifically, the cylinder 121 of the driving unit 120 is operated to close the upper side of the pipe 1 by the blocking plate 110. As the blocking unit 100 operates in this way, the speed of the air flowing down the pipe 1 becomes faster, and the dust D accumulated in front of the blocking unit 100 is scattered and removed.

At this time, a plurality of blocking units 100 may also be installed. In this case, the blocking unit 100 and the differential pressure gauge 200 may be arranged alternately.

That is, when the blocking unit 100 located behind the differential pressure gauge 200 senses that the atmospheric pressure is increased, the flow rate of the dust D is increased and the dust D accumulated at the corresponding position is scattered It can be removed.

Also, the dust-collecting hood according to the present invention may be integrally formed, but as shown in FIG. 7, various configurations may be continuously connected. In the case of the integral type, there is an advantage that the outflow of air can be minimized. However, it is difficult to manufacture and install, and there is a disadvantage in terms of maintenance of the facility. Therefore, for simpler manufacture, installation, and maintenance, it is possible to provide a configuration in which the shielding unit 100 and the differential pressure gauge 200 are set as one set. For the connection of these structures, a flange type as shown in the drawing or a conventionally known pipe connection type can be used.

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, You will understand.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

1: pipe 100: breaking unit
110: blocking plate 111: hinge shaft
112: guide groove 120:
121: cylinder 122: rod
123: extension part 200: differential pressure gauge
300: seat groove D: dust

Claims

A pipe through which at least a gas containing dust is transferred;
Sectional area of the inside of the pipe installed in the pipe so as to locally increase the velocity of the gas transported in at least the lower region of the pipe so as to scatter dust accumulated on the bottom of the pipe or to prevent deposition of dust. And a shut-off unit for controlling the shutoff unit.

The method according to claim 1,
Wherein the blocking unit includes a blocking plate rotatably installed on an upper surface of the pipe to adjust a cross-sectional area of an upper region of the pipe, and a driving unit that rotates the blocking plate.

The method of claim 2,
Wherein the blocking plate is inserted into a seating groove formed in an upper surface of the pipe when the pipe is fully opened, and is not interfered with a gas conveyed into the pipe.

The method of claim 2,
Wherein one end of the blocking plate is hinged to an inner upper surface of the pipe,
Wherein the driving unit includes a cylinder provided on the upper side of the pipe and a rod connected to the cylinder and passing through the upper side of the pipe and contacting the upper surface of the blocking plate.

The method of claim 4,
Wherein a guide groove is formed on an upper surface of the blocking plate so that an end of the rod is inserted and slid forward and backward.

The method of claim 5,
Further comprising an extension portion rotatably coupled to an end of the rod and formed to be wider than the diameter of the rod and inserted into the guide groove,
Wherein the guide groove is formed to have a cross-sectional shape corresponding to the shape of the extension portion and the rod so that the extension portion is fixed so as not to come off when the shield plate is rotated.

The method according to claim 1,
A plurality of differential pressure gauges disposed apart from each other along the longitudinal direction of the pipe to measure the atmospheric pressure at each position, And a control unit for receiving the atmospheric pressure information from the differential pressure meter to determine whether or not dust is deposited, and operating the blocking unit when dust is deposited.

The method of claim 7,
Wherein a plurality of the blocking units are provided along the longitudinal direction of the pipe,
The blocking unit and the differential pressure gauge are alternately arranged,
Wherein the control unit operates the blocking unit located behind the position where the dust deposition is generated to raise the gas flow rate at the position where the dust deposition has occurred and disperse the dust.