KR101247591B1 - Appartus for buffering wind force causing shock in screen - Google Patents

Abstract

PURPOSE: A device for buffering air volume impact to a screen is provided to reduce environmental contamination by scattering dusts and to reduce work load for dust removal by relieving the change of air volume when a screen is being operated. CONSTITUTION: A device for buffering air volume impact to a screen comprises a buffer part(100) and a driving part(200). The buffer part is installed at the external wall of a dust collection hood for connecting a ventilation hole and an entrance and comprises bellows which relieves the change of air volume due to the vibration of the screen. The driving part is operated by the generated vibration when the screen is operated and extends and compresses the bellows. The bellows is fixed to the pipe using a pipe clamp in the status which the entrance is inserted at the fixed pipe to connect the ventilation hole at the external wall of the dust collection hood. The driving part comprises a vibration delivery unit which is connected to the screen; and an amplification unit which extends and compresses the bellows with the amplified amplitude by amplifying the amplitude of the vibration through the vibration delivery unit during the operation of the screen. The vibration delivery unit comprises a buffering support(211) which is coupled between side plates of the both sides of the screen; and a sleeve which controls the limit position of the shaft for preventing breakaway of the shaft from the opening.

Description

Shock air volume buffering device of screen {APPARTUS FOR BUFFERING WIND FORCE CAUSING SHOCK IN SCREEN}

The present invention relates to a device for buffering the impact air volume of a screen, and more particularly, to cushion shock impact air volume changes generated during operation of a screen, thereby preventing dust scattering due to the air volume change, and thus damaging and sealing of the screen and dust collecting hood. An impact air volume buffering device of a screen for preventing premature wear.

In general, when the blast furnace operation charges a layer of iron ore and fuel coke from the upper part of the blast furnace and blows hot air from a hot stove through the tuyere from the lower part of the blast furnace, Iron ore is reduced and dissolved to produce molten iron and slag.

Iron ore used in such blast furnace operations usually refers to ores containing 30 to 70% of iron. Since iron ore in its natural state varies in quality, composition, and shape according to its origin, it is sintered in the sintering process to equalize the quality and produce iron ore powder to a certain size before entering the blast furnace, and then enter the blast furnace through a charging facility. .

The ore sintered in the sintering process is temporarily stored in the storage bin (1) and discharged to the screen (2), as shown in FIG. 1 and separated into lumps and spectroscopy according to the particle size in the screen (2) The silver is weighed into the weighing hopper 3 and charged into the blast furnace 5 through the charging belt conveyor 4, and the spectra are transferred to the sintering process through the SF-1 belt conveyor 6 and sintered again.

The screen (2) is to separate the ore by the particle size to ensure the ventilation in the blast furnace to maintain a stable aging, as shown in Figure 2 bin chute (bin chute, 1A) installed at the bottom of the storage bin (1) The ore discharged through the light is separated into a lump having a particle size larger than the hole size and a spectrometer having a particle size smaller than the hole size by using the mat 2A having a plurality of holes perforated in the screen 2. It is discharged to the weighing hopper 3 and the spectra are discharged to the SF-1 belt conveyor 6 through the lower powder chute 2B.

As shown in FIG. 3 for smooth flow and shorter uptime, the screen 2 is basically roughly positioned such that the empty chute 1A side into which the ore flows is located higher than the side of the wading hopper 3 through which the ore is discharged. It has an inclination of 5 to 10 degrees and vibrates in a direction of approximately 45 degrees by the vibrator 2C. It is easy to control the flow of the ore by vibrating action at this time, but the shock flow rate change occurs due to the characteristics of the screen 2, which vibrates more than 11 times per second and a large amount of ore moves and the sound pressure and the positive pressure change instantaneously. Due to the scattering of the spectroscopic particles contained in the ore, a large amount of dust is generated to pollute the surrounding environment.

Thus, a dust collecting hood 7 is provided on the upper portion of the screen 2 for dust collection. The dust suspended in the upper part can be discharged through the dust collection hood 7, but the gap between the screen 2 and the surrounding fixed structures (dust collection hood, bin suit, dust chute, etc.), wetting as shown in FIG. The dust emitted through the gap between the hopper 3 and the dust collection hood 7 could not be prevented.

The dust emitted through the gap is not only surrounding structures such as the dust collection hood 7 and the wading hopper 3, but also the side plate 2D and the support of the screen 2 itself as shown in FIGS. 5A and 5B. 2E, bottom plates 2F, 2G, vibrating side plates 2H, etc., generate cracks and vibrate to peripheral decks.

Sealing devices are installed in the gaps in order to prevent dust emissions through the gaps, and these sealing devices have been developed in various forms such as curtain type sealing devices, hermetic sealing devices, and removable sealing devices.

However, the sealing device is only a temporary measure to prevent the dust from being blown out of the screen 2, and between the screen 2 and the dust collection hood 7 in which dust scattered by the shocking air volume change is sealed by the sealing device. Hitting the screen 2, the dust collection hood 7 and the sealing device in the inner space of the shortening of the life of the screen 2 and the dust collection hood 7 there was a problem that the sealing device is worn early.

The present invention has been made to solve the above problems, to cushion the shock flow rate changes generated during the operation of the screen to prevent dust scattering due to the change of the air flow rate and resulting damage to the screen and dust collection hood, to prevent premature wear of the sealing device It is an object of the present invention to provide a buffer device for shock volume of a screen.

According to an aspect of the present invention, an impact air volume buffering device for a screen may include a screen for separating and discharging ore according to a particle size while being vibrated by a vibrator, and a dust collecting hood installed on the screen to collect dust and having a vent and an opening. In the screen device comprising: a buffer unit consisting of a bellows is installed on the outer wall of the dust collection hood is connected to the inlet to the ventilation opening and extends and compresses to mitigate the air volume change due to the vibration of the screen, and occurs when the screen is in operation And a drive that is actuated by vibrating vibration to extend and compress the bellows.

The bellows is fixed to the pipe using a pipe clamp in the state in which the inlet is inserted into the pipe fixed to the outer wall of the dust collection hood to be connected to the vent.

The driving unit includes a vibration transmission unit connected to the screen, and an amplification unit for extending and compressing the bellows with an amplified amplitude by amplifying the amplitude of the vibration transmitted through the vibration transmission unit when the screen is operated. do.

The vibration transmission unit may include a buffering support fastened between side plates on both sides of the screen, and a rear end of which a front end is connected to the buffering support and faces the front end through an opening of the dust collecting hood to protrude out of the dust collecting hood. A shaft having a hollow cylindrical shape, a base fixed to the dust collecting hood outer wall so as to be connected to the opening, and a limit position of the shaft so as not to be detached from the opening by being fitted to the shaft protruding out of the dust collecting hood. It is characterized in that it comprises a sleeve for interrupting.

The base further includes a lubricant inlet passage, further comprising a paper feed line connected to the lubricant inlet passage to supply lubricant to the sleeve.

The amplifying unit, the buffering plate is attached to the rear end of the bellows, the buffering plate is connected between the buffering plate and the vibration transmission unit and amplifies the amplitude of the vibration transmitted through the vibration transmission unit to amplify the buffering plate with an amplified amplitude It characterized in that it comprises a bellows amplifier to advance back and forth.

The buffering plate is characterized in that attached to the rear end of the bellows using an adhesive.

The bellows amplifier may include a first and a second link bar connected to the rear end of the shaft by a connecting pin in a state in which an intermediate part is rotatably coupled to each other by a link, and one end of each of the first and second link bars is connected to the shaft. Third and fourth link bars coupled to the front end and connected to the base by connecting pins in a state in which the other ends are rotatably coupled to each other by a link, and one end of each of the rear ends of the first and second link bars. And fifth and sixth link bars coupled to the buffering plate by connecting pins in a state in which the other end is rotatably coupled to each other by a link, wherein the first and second link bars are separated from the intermediate portion. It is characterized in that the length L2 to the rear end is configured to be longer than the length L1 from the middle to the front end.

The third and fourth link bars may have the same length as the length L1 from the middle portion to the tip portion of the first and second link bars, and the fifth and sixth link bars may have the first and second links. It is characterized by consisting of the same length as the length (L2) from the middle portion of the bar to the rear end.

According to the present invention, the change in the amount of air generated during screen operation is alleviated to reduce dust scattering. Therefore, it is possible to reduce environmental pollution due to dust scattering, and to reduce the workload due to dust removal. In addition, damage to the screen and dust collection hood caused by scattered dust, early wear of the sealing device is prevented to improve the life of the equipment can reduce the cost and work load due to equipment repair.

1 is a view illustrating a flow of fuel and raw materials in a typical blast furnace installation.
2 is a perspective view of a typical screen.
3 is an installation diagram of a screen and a dust collecting hood.
FIG. 4 is a view showing the change of amplitude according to the dust emission state and the screen vibration through the gap in the screen.
FIG. 5A is a cross-sectional view illustrating each part of a screen to explain a crack occurrence situation of the screen.
5B is a longitudinal sectional view showing each part of the screen in order to explain the crack occurrence situation of the screen.
6 is an installation diagram of the impact air volume buffering device of the screen according to an embodiment of the present invention.
7 is an exploded view of the impact air volume buffering device of the screen according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating a connection structure of the bellows amplifier of FIG. 7.
9a and 9b is a view showing the impact air volume buffering action according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 4 again, as a result of measuring the vibrating action of the screen during screen operation, the average value was derived. As a result, a moving width of 16 mm in the 45 degree direction, 11.4 mm in the front, rear, and top and bottom was formed. As a result of calculating the volume of the screen moved between the screen amplitude lower limit (A) and the screen amplitude upper limit (B), except for the back bottom plate, which is not greatly influenced by the inclination angle, as shown in Table 1 below, on average, 187,679,625mm ^It was confirmed that the volume reached ³ vibrated with yin and yang more than 11 times per second.

Part Name direction Width (mm) Length (mm) Area (mm ² ) Volume (mm ³ ) Front bottom plate level 2,485 4,400 10,934,000 24,647,600 Back cover
level 2,485 555 1,379,175 15,722,595 Perpendicular 2,485 560 1,391,600 15,864,240 Door plate Perpendicular 2,485 1,100 2,758,350 31,445,190 187,679,625

The impact air volume buffering device 10 of the screen according to the present invention is to alleviate the impact air volume change generated during the operation of the screen by providing an alternative space corresponding to the screen vibration volume, as shown in Figures 6 and 7 The buffer unit 100 and the driving unit 200 are included.

In order to install the apparatus 10 of the present invention, the dust collecting hood 7 is provided with a ventilation opening 7A and an opening 7B.

The buffer unit 100 is installed on the outer wall of the dust collecting hood 7 to be connected to the vent hole 7A to mitigate the change in the air volume caused by the vibration of the screen 2, and the buffer unit 100 is the vent hole 7A. The inlet is connected to and consists of a bellows 110 which is extensible and compressible.

In order to install the bellows 110 on the outer wall of the dust collecting hood 7, a pipe 120 having an inner diameter having a size equal to or slightly larger than the diameter of the vent 7A is provided on the outer wall of the dust collecting hood 7. 7A, the pipe clamp 130 is fastened to the inlet of the bellows 110 while the inlet of the bellows 110 is inserted into the pipe 120.

The driving unit 200 is operated by the vibration of the operating screen 2 to expand and compress the bellows 110, and the driving unit 200 includes a vibration transmission unit 210 and an amplification unit 220. do.

The vibration transmission unit 210 is connected to the screen 2 to transmit the vibration of the screen 2 in operation to the amplification unit 220, the buffering support 211, shaft 212, sleeve 213 ) And base 214.

The buffering support 211 has a bar shape and is fastened between side plates 2D on both sides of the screen 2. In order to fix the buffering support 211 to the side plate 2D, brackets 211A and 211B integrally formed with the buffering support 211 are formed at both ends of the buffering support 211. A fastening hole 81 is formed in the brackets 211A and 211B, and is configured to be fastened to the side plate 2D by using the bolt 82, the nut 83, and the washer 84.

The shaft 212 has a bar shape, the leading end 212A of the shaft 212 is connected to the center of the buffering support 211 and the rear end 212B of the shaft 212 is an opening 7B of the dust collection hood 7. It projects through the dust collector hood 7 outside. In order to connect the shaft 212 to the buffering support 211, a bracket 85 is fixed to the center of the buffering support 211. Bracket 85 has a cross-section formed in a 'c' shape and a fastening hole 85A is formed to use the tip portion 212A of the shaft 212, the bolt 86, the nut 87 and the washer 88. It is configured to be fastened to.

Although the present embodiment illustrates and describes only the case where the buffering support 211 and the shaft 212 are bolted to each other via the bracket 85, the present invention is not limited thereto and the buffering support 211 and the shaft 212 are not limited thereto. ) May be joined by welding, or may be molded integrally.

The sleeve 213 fits into the outer periphery of the shaft 212 protruding out of the dust collection hood 7 through the opening 7B of the dust collection hood 7 so that the shaft 212 does not leave the opening 7B. To limit the limit position of the shaft 212. The inner diameter of the sleeve 213 is configured to be slightly larger than the outer diameter of the shaft 212 so that the sleeve 213 is tightly fitted to the shaft 212, and the sleeve 213 does not pass through the opening 7B. The outer diameter of 213 is comprised with the magnitude | size smaller than the diameter of the opening 7B.

The base 214 is formed in a substantially hollow cylindrical shape, and is fixed to the outer wall of the dust collecting hood 7 so as to be connected to the opening 7B. The inner diameter of the base 214 is configured to be larger than the outer diameter of the sleeve 213 to allow the sleeve 213 to enter and exit. In addition, the base 214 is provided with a lubricant inlet passage 214A to supply lubricant to the sleeve 213 which is frequently in and out of the base 214, and a paper feed line 300 is connected to the lubricant inlet passage 214A. The feed line 300 is connected to a feed system (not shown) that controls the injection of lubricant. The paper feeding system is configured to supply lubricant at regular time intervals, for example using a timer (not shown), or before or in operation of the screen 2 in conjunction with the operation of the screen 2. It is configured to supply lubricant for a certain time.

The amplification unit 220 serves to expand and compress the bellows 110 with the amplified amplitude by amplifying the amplitude of the vibration transmitted through the vibration transmission unit 210, which is attached to the rear end of the bellows 110. A bellows amplifier 222 which amplifies the amplitude of the vibration transmitted through the buffering plate 221 and the vibration transmitting unit 210 and advances the buffering plate 221 up and down by the amplified amplitude.

The buffering plate 221 is attached to the rear end of the bellows 110 by using an adhesive. The bellows 110 is stretched and compressed by pulling and pressing the bellows 110 while being advanced up and down by the bellows amplifier 222. Let's do it.

The bellows amplifier 222 has a structure in which three pairs of link bars 91, 92, 93, 94, 95, and 96 having a long and flat shape and having different lengths are folded in a bellows shape, as shown in FIG. 8. Have

The first and second link bars 91 and 92 having the longest lengths are rotatably coupled by the link 97A with the intermediate portions P1 intersecting each other to form an 'X' shape. The third and fourth link bars 93 and 94 having the shortest lengths are rotatably coupled to one ends of the first and second link bars 91 and 92 using the links 97B and 97C, respectively. The other ends P2 of the third and fourth link bars 93 and 94 are rotatably coupled to each other using the link 97D.

The fifth and sixth link bars 95 and 96 having intermediate lengths are rotatably coupled at one end to the rear ends of the first and second link bars 91 and 92 using the links 97E and 97F, respectively. The other ends of the fifth and sixth link bars 95 and 96 are rotatably coupled to each other using the link 97G.

The other ends of the third and fourth link bars 93 and 94 coupled by the link 97D are connected to the base 214 using the connecting pin 97H, and coupled by the link 97A. The first and second link bars 91 and 92 are connected to the rear end 212B of the shaft 212 using the connecting pins 97J and 97K, and the fifth and second links are connected by the link 97G. 6 The other ends of the link bars 95 and 96 are connected to the bushing 211A formed on the buffering plate 221 using the connecting pins 97L and 97M.

Here, the first and second link bars 91 and 92 are configured such that [the length L1 from the middle part to the rear end part] is longer than the [length L2 from the middle part to the tip end part], and the shaft 213 When the length of the straight line from the other end of the third and fourth link bars 93 and 94 to the middle of the first and second link bars 91 and 92 increases, that is, the length of D1 is increased by The length of the straight line from the middle of the first and second link bars 91 and 92 to the other ends of the fifth and sixth link bars 95 and 96, that is, the length of D2 is increased more than the increase of D1. do.

In order to fold the link bars 91, 92, 93, 94, 95, and 96 stably, the third and fourth link bars 93 and 94 have the same length as L2, and the fifth and sixth links. It is preferable to configure the bars 95 and 96 to the same length as L1.

Referring to the operation of the impact air volume buffering device of the screen according to the present invention configured as described above are as follows.

As shown in FIG. 9A, when the screen 2 vibrates in the W direction, the buffering support 211 coupled to the side plates 2D on both sides of the screen 2 and the shaft 212 connected thereto vibrate the screen 2. In the same direction as the W direction, the shaft 212 is advanced out of the dust collection hood (7). As the shaft 213 moves forward, the linear length from the other end of the third and fourth link bars 93 and 94 to the middle part of the first and second link bars 91 and 92, that is, D1 is increased. Accordingly, the straight line length from the middle of the first and second link bars 91 and 92 to the other ends of the fifth and sixth link bars 95 and 96, that is, D2 increases more than the increase of D1. The buffering plate 221 is advanced upward with the increased amplitude, and the bellows 110 is stretched by being pulled by the buffering plate 221 which is swung upward.

As shown in FIG. 9B, when the screen 20 is vibrated in the -W direction, the buffering support 211 fastened to the side plates 2D on both sides of the screen 2 and the shaft 212 connected thereto are connected to the screen 2. As in the vibration direction, the shaft 212 moves backward in the dust collection hood 7. As the shaft 212 reverses, the straight line length D1 from the other end of the third and fourth link bars 93 and 94 to the middle part of the first and second link bars 91 and 92 is reduced, Accordingly, the straight line length D2 from the middle of the first and second link bars 91 and 92 to the other end of the fifth and sixth link bars 95 and 96 is also reduced, so that the buffering plate 221 is lowered. As it is to be reversed, the bellows 110 is compressed by being pressed by the buffering plate 221 retreating downward.

In this manner of operation, the bellows 110 is stretched to the maximum at the upper limit of the amplitude B of the screen 2 and maximally contracted at the lower limit of the screen A as the vibration of the operating screen 2. Synchronization provides a space to replace the variable volume of the screen 2 so that the change in the amount of air generated due to the variable volume of the screen 2 is reduced.

Although in the embodiment shown in the drawings, only two bellows 110 is shown and described, but the bellows 110 is intended to provide an alternative space corresponding to the variation in volume due to the vibration of the screen (2) The number and capacity of installation of the bellows can be changed according to the variable volume of the screen 2 measured at the actual operation site.

According to the present invention, the change in the amount of air generated during screen operation is alleviated to reduce dust scattering. Therefore, it is possible to reduce environmental pollution due to dust scattering, and to reduce the workload due to dust removal. In addition, damage to the screen, dust collection hood, and premature wear of the sealing device caused by scattered dust is prevented, thereby improving the life of the equipment, thereby reducing the cost and workload of the repair of the equipment.

In the detailed description of the present invention described above with reference to the embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the scope of the present invention described in the claims and It will be appreciated that various modifications and variations can be made in the present invention without departing from the scope of the art.

100: buffer part
110: bellows
200: drive unit
210: vibration transmission unit
211: Buffering Support
212: shaft
213: sleeve
214: base
220: amplification unit
221: buffering plate
222: bellows amplifier

Claims (9)

In the screen device comprising a screen for vibrating by the vibrator and separating the ore according to the size of the particle size and a dust collecting hood installed on the upper screen to collect dust and having a vent and an opening,
A buffer unit installed at an outer wall of the dust collecting hood to be connected to an inlet of the ventilation hole, and configured to have a bellows to reduce a change in air volume due to vibration of the screen while being stretched and compressed; And
And a driving unit operated by vibration generated during operation of the screen to expand and compress the bellows.
The screen of claim 1, wherein the bellows is fixed to the pipe by using a pipe clamp while an inlet is inserted into a pipe fixed to the outer wall of the dust collecting hood. .
According to claim 1, The drive unit Vibration transmission unit connected to the screen; And
And an amplifying unit configured to amplify the amplitude of the vibration transmitted through the vibration transmitting unit when the screen is operated, thereby expanding and compressing the bellows with the amplified amplitude.
According to claim 3, The vibration transmission unit,
A buffering support fastened between side plates on both sides of the screen;
A shaft having a distal end connected to the buffering support and having a rear end facing the distal end passing through an opening of the dust collecting hood to protrude out of the dust collecting hood;
A base having a hollow cylindrical shape and fixed to the dust collecting hood outer wall so as to be connected to the opening; and
And a sleeve fitted to a shaft protruding out of the dust collecting hood to control a limit position of the shaft so that the shaft does not leave the opening.
5. The apparatus of claim 4, wherein the base further comprises a lubricant inlet passage, and further includes a paper feed line connected to the lubricant inlet passage to supply lubricant to the sleeve.
The method of claim 4, wherein the amplification unit,
A buffering plate attached to a rear end of the bellows; And
And a bellows amplifier connected between the buffering plate and the vibration transmission unit and amplifying the amplitude of the vibration transmitted through the vibration transmission unit to advance the buffering plate forward and backward with the amplified amplitude. Buffering device.
7. The apparatus of claim 6, wherein the buffering plate is attached to the rear end of the bellows using an adhesive.
The method of claim 6, wherein the bellows amplifier,
First and second link bars connected to the rear end of the shaft by a connecting pin in a state in which the middle part is rotatably coupled to each other by a link;
Third and fourth link bars connected to the base by connecting pins with one end coupled to a front end of the first and second link bars and the other end rotatably coupled to each other by a link; And
And fifth and sixth link bars connected to the buffering plate by connecting pins with one end coupled to a rear end of the first and second link bars and the other end rotatably coupled to each other by a link. ,
And the first and second link bars have a length (L2) from the middle portion to the rear end portion longer than the length (L1) from the middle portion to the tip portion.
The method of claim 8, wherein the third and fourth link bar has a length equal to the length (L1) from the middle portion to the front end of the first, second link bar, the fifth sixth link bar is The impact air volume buffering device of the screen, characterized in that the length is the same as the length (L2) from the middle portion to the rear end of the first, second link bar.

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