CN214781931U - Elbow uniform air inlet device for air inlet system in furnace - Google Patents

Abstract

The utility model discloses an even hot blast blowpipe apparatus of elbow for air inlet system in stove, including the return bend, the return bend comprises exhaust pipe and air-supply line jointly, and the bottom of exhaust pipe and the one end fixed connection of air-supply line, the one end rotation that the bottom of air-supply line inner wall is close to the exhaust pipe is connected with the buffer board, the utility model discloses the beneficial effect who reaches is: the utility model discloses compact structure, easy operation is convenient, therefore, the clothes hanger is strong in practicability, kneck through at the elbow sets up the buffer board, can cushion the inside wind regime of entering the elbow, thereby avoid its direct striking at the elbow kneck, simultaneously through setting up even water conservancy diversion mechanism, can carry out even water conservancy diversion to the wind regime through the elbow, thereby make the air inlet even, very big improvement the air inlet and smelt the effect, simultaneously through setting up clearance mechanism in one side of filter screen, can clear up the dust that is infected with on the filter screen, thereby very big improvement the result of use of equipment.

Description

Elbow uniform air inlet device for air inlet system in furnace

Technical Field

The utility model belongs to the air inlet device field specifically is an even air inlet device of elbow for air inlet system in stove.

Background

In the existing life, a blast furnace uses a steel plate as a furnace shell, a refractory brick lining is built in the shell, a blast furnace body is divided into a furnace throat, a furnace body, a furnace waist, a furnace belly and a furnace hearth 5 from top to bottom, the blast furnace ironmaking technology has the advantages of good economic indexes, simple process, large production capacity, high labor production efficiency, low energy consumption and the like, and the inside of the blast furnace is often provided with an air inlet system for ventilating the interior of the blast furnace.

But the elbow that traditional stove interior air inlet system used is when using, its inside mostly does not set up hot blast blowpipe apparatus, thereby the wind that leads to getting into the elbow directly blows on the inner wall of elbow, not only cause the elbow to take place to damage easily, but also cause the air inlet inadequately even easily, thereby serious influence the air inlet effect, and then reduce and smelt the quality, the elbow is when using for the air inlet system in present stove simultaneously, mostly only carry out filterable through setting up the impurity that the filter screen contains in the external wind source, after long-term the use, cause the filter screen to block up easily, be not convenient for clear up, lead to the result of use relatively poor, be unfavorable for actual use.

The utility model has the following contents:

the utility model aims at providing an even hot blast blowpipe apparatus of elbow for air inlet system in stove in order to solve above-mentioned problem, solved the problem of mentioning in the background art.

In order to solve the above problem, the utility model provides a technical scheme:

an elbow uniform air inlet device for an air inlet system in a furnace comprises a bent pipe, wherein the bent pipe is composed of an exhaust pipe and an air inlet pipe, the bottom of the exhaust pipe is fixedly connected with one end of the air inlet pipe, one end, close to the exhaust pipe, of the bottom of the inner wall of the air inlet pipe is rotatably connected with a buffer plate, the bottom of the inner wall of the air inlet pipe is fixedly connected with a fixed plate on one side of the buffer plate, a first slide bar is fixedly connected between the fixed plate and the inner wall of the exhaust pipe, a slide block is slidably connected to the outer side of the first slide bar, a return spring is sleeved between the outer side of the first slide bar and the inner wall of the exhaust pipe, one end, far away from the slide block, of the return spring is fixedly connected with the inner wall of the exhaust pipe, one end, far away from the inner wall of the exhaust pipe, of the return spring is fixedly connected with the slide block, a support rod is rotatably connected to the outer side of the slide block, one end, far away from the support rod is rotatably connected with the bottom of the buffer plate, the outside of exhaust pipe and the top that is located the buffer board are provided with even water conservancy diversion mechanism, the one end fixedly connected with filter that the exhaust pipe was kept away from to the air-supply line, the filtration hole has been seted up to the outside equidistance of filter, the inside of air-supply line and the one side that is located the filter are provided with clearance mechanism.

Preferably, the uniform flow guide mechanism comprises a mounting box, the mounting box is fixedly connected to the outer side of the exhaust pipe and above the buffer plate, heat dissipation holes are formed in the bottom of the mounting box at equal intervals, a first servo motor is fixedly mounted on one side, far away from the exhaust pipe, of the inner wall of the mounting box, a driving gear is fixedly connected to an output shaft of the first servo motor, a rotating shaft is rotatably connected to the inner wall of the mounting box and above the first servo motor, a driven gear is fixedly connected to the outer side of the rotating shaft, a first fixing rod is fixedly connected to the inner wall of the mounting box and between the first servo motor and the rotating shaft, a second fixing rod is fixedly connected to one side, far away from the exhaust pipe, of the top of the driven gear, a torsion spring is sleeved on one side, far away from the driven gear, of the outer side of the rotating shaft, and one end, far away from the driven gear, of the torsion spring is lapped outside the first fixing rod, torsion spring keeps away from the one end overlap joint in the outside of second dead lever of first dead lever, the one end that the axis of rotation is close to the exhaust pipe extends to the inside and the fixedly connected with guide plate of exhaust pipe, the guiding gutter has been seted up to one side equidistance that the axis of rotation was kept away from to the guide plate.

Preferably, the cleaning mechanism comprises a chute, the top and the bottom of the inner wall of the air inlet pipe and one side of the filter plate are both provided with a chute, the inside of the chute is both connected with a second slide bar in a sliding manner, a cleaning frame is connected between the two second slide bars in a sliding manner, the cleaning frame is connected with the chute in a sliding manner, both ends of the inside of the cleaning frame are both fixedly connected with a first connecting rod, the inside of the cleaning frame and one side of the two first connecting rods are fixedly connected with a second connecting rod, the first connecting rod and one side of the second connecting rod, which is close to the filter plate, are both equidistantly fixedly connected with a cleaning needle, the bottom of the inner wall of the air inlet pipe and one side of the chute are rotatably connected with a first rotating rod, the top of the inner wall of the air inlet pipe and one side of the chute are rotatably connected with a second rotating rod, and the top of the air inlet pipe and one side of the second rotating rod are fixedly provided with a second servo motor, the output shaft of second servo motor extends to the inside of air-supply line and with second dwang fixed connection, fixedly connected with knee between second dwang and the first dwang, the outside of knee is rotated and is connected with the catch bar, the one end that the knee was kept away from to the catch bar is rotated with the outside of second connecting rod and is connected.

Preferably, the bottom of the air inlet pipe and one side of the filter plate are fixedly connected with a cleaning pipe, the top of the cleaning pipe extends to the inside of the air inlet pipe, and the outer side of the cleaning pipe is fixedly provided with a flashboard.

Preferably, teeth are arranged at one half part of the outer side of the driving gear, the teeth part of the outer side of the driving gear is meshed with the driven gear, and the diameter ratio of the driving gear to the driven gear is one to two.

Preferably, the size of each cleaning needle is smaller than that of each filtering hole, and the cleaning needles are located on one side of the corresponding filtering holes.

Preferably, the first servo motor and the second servo motor are electrically connected with an external control box.

The utility model discloses the beneficial effect who reaches is: the utility model discloses compact structure, easy operation is convenient, therefore, the clothes hanger is strong in practicability, kneck through at the elbow sets up the buffer board, can cushion the inside wind regime of entering the elbow, thereby avoid its direct striking at the elbow kneck, simultaneously through setting up even water conservancy diversion mechanism, can carry out even water conservancy diversion to the wind regime through the elbow, thereby make the air inlet even, very big improvement the air inlet and smelt the effect, simultaneously through setting up clearance mechanism in one side of filter screen, can clear up the dust that is infected with on the filter screen, thereby very big improvement the result of use of equipment.

Description of the drawings:

the accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic view of the structure of the baffle of the present invention;

FIG. 4 is a schematic view of the cleaning frame of the present invention;

fig. 5 is an enlarged view at B in fig. 1.

In the figure: 1. bending the pipe; 2. an exhaust duct; 3. an air inlet pipe; 4. a buffer plate; 5. a fixing plate; 6. a first slide bar; 7. a slider; 8. a return spring; 9. a support bar; 10. a uniform flow guide mechanism; 101. mounting a box; 102. heat dissipation holes; 103. a first servo motor; 104. a driving gear; 105. a rotating shaft; 106. A first fixing lever; 107. a driven gear; 108. a torsion spring; 109. a second fixing bar; 1010. a baffle; 1011. a diversion trench; 11. a cleaning mechanism; 111. a chute; 112. a second slide bar; 113. cleaning the frame; 114. a first connecting rod; 115. a second connecting rod; 116. cleaning the needle; 117. a first rotating lever; 118. a second servo motor; 119. a second rotating lever; 1110. bending a rod; 1111. a push rod; 12. A filter plate; 13. a filtration pore; 14. cleaning the pipe; 15. a gate plate.

The specific implementation mode is as follows:

the preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention. Example (b):

as shown in fig. 1-5, the utility model provides an elbow uniform air intake device for an air intake system in a furnace, which comprises a bent pipe 1, wherein the bent pipe 1 is composed of an exhaust pipe 2 and an air intake pipe 3, and the bottom of the exhaust pipe 2 is fixedly connected with one end of the air intake pipe 3, so that the exhaust pipe 2 is convenient for better discharging air source; the bottom of the inner wall of the air inlet pipe 3 is rotatably connected with a buffer plate 4 near one end of the exhaust pipe 2, the bottom of the inner wall of the air inlet pipe 3 is fixedly connected with a fixed plate 5 at one side of the buffer plate 4, a first slide bar 6 is fixedly connected between the fixed plate 5 and the inner wall of the exhaust pipe 2, a slide block 7 is slidably connected with the outer side of the first slide bar 6, a return spring 8 is sleeved between the slide block 7 and the inner wall of the exhaust pipe 2 at the outer side of the first slide bar 6, one end of the return spring 8 far away from the slide block 7 is fixedly connected with the inner wall of the exhaust pipe 2, one end of the return spring 8 far away from the inner wall of the exhaust pipe 2 is fixedly connected with the slide block 7, a support rod 9 is rotatably connected with the outer side of the slide block 7, one end of the support rod 9 far away from the slide block 7 is rotatably connected with the bottom of the buffer plate 4, when an air source enters the interior of the equipment through the air inlet pipe 3, the air source is directly blown to the outer side of the buffer plate 4 to push the buffer plate 4 to rotate, thereby pushing the supporting rod 9 to rotate, pushing the sliding block 7 to move outside the first sliding rod 6 through the supporting rod 9, simultaneously extruding the return spring 8, and buffering the movement of the sliding block 7 through the elastic action of the return spring 8, thereby better buffering the rotation of the buffer plate 4; an even flow guide mechanism 10 is arranged on the outer side of the exhaust pipe 2 and above the buffer plate 4, one end of the air inlet pipe 3, which is far away from the exhaust pipe 2, is fixedly connected with a filter plate 12, and filter holes 13 are formed in the outer side of the filter plate 12 at equal intervals, so that an air source entering the air inlet pipe 3 can be better filtered through the filter holes 13; a cleaning mechanism 11 is arranged inside the air inlet pipe 3 and on one side of the filter plate 12.

Further, the uniform diversion mechanism 10 includes a mounting box 101, the mounting box 101 is fixedly connected to the outer side of the exhaust pipe 2 and above the buffer plate 4, heat dissipation holes 102 are equidistantly formed in the bottom of the mounting box 101, a first servo motor 103 is fixedly mounted on the side, away from the exhaust pipe 2, of the inner wall of the mounting box 101, an output shaft of the first servo motor 103 is fixedly connected with a driving gear 104, a rotating shaft 105 is rotatably connected to the inner wall of the mounting box 101 and above the first servo motor 103, a driven gear 107 is fixedly connected to the outer side of the rotating shaft 105, a first fixing rod 106 is fixedly connected to the inner wall of the mounting box 101 and between the first servo motor 103 and the rotating shaft 105, a second fixing rod 109 is fixedly connected to the side, away from the exhaust pipe 2, of the top of the driven gear 107, a torsion spring 108 is sleeved on the side, away from the driven gear 107, and one end, away from the driven gear 107, of the torsion spring 108 is lapped on the outer side of the first fixing rod 106, torsion spring 108 keeps away from the one end overlap joint of first dead lever 106 in the outside of second dead lever 109, the one end that axis of rotation 105 is close to exhaust pipe 2 extends to the inside and the fixedly connected with guide plate 1010 of exhaust pipe 2, guide plate 1010 keeps away from one side equidistance of axis of rotation 105 and has seted up guiding gutter 1011, be convenient for better carry out even water conservancy diversion to the wind regime after buffer board 4 cushions through setting up even water conservancy diversion mechanism 10, thereby make the air inlet even, very big improvement the air inlet and smelt the effect.

Further, the cleaning mechanism 11 includes a chute 111, the top and the bottom of the inner wall of the air inlet duct 3 and one side of the filter plate 12 are both provided with the chute 111, the inside of the chute 111 is both slidably connected with a second slide bar 112, a cleaning frame 113 is slidably connected between the two second slide bars 112, the cleaning frame 113 is slidably connected with the chute 111, both ends inside the cleaning frame 113 are both fixedly connected with a first connecting rod 114, the inside of the cleaning frame 113 and one side of the two first connecting rods 114 are fixedly connected with a second connecting rod 115, one side of the first connecting rod 114 and one side of the second connecting rod 115 close to the filter plate 12 are both fixedly connected with a cleaning needle 116 at equal intervals, the bottom of the inner wall of the air inlet duct 3 and one side of the chute 111 are rotatably connected with a first rotating rod 117, the top of the inner wall of the air inlet duct 3 and one side of the chute 111 are rotatably connected with a second rotating rod 119, the top of the air inlet duct 3 and the top of the second rotating rod 119 are fixedly provided with a second servo motor 118, an output shaft of the second servo motor 118 extends into the air inlet pipe 3 and is fixedly connected with the second rotating rod 119, a bent rod 1110 is fixedly connected between the second rotating rod 119 and the first rotating rod 117, and the bent rod 1110 is of a U-shaped structure, so that better transmission is facilitated; the outside of curved bar 1110 is rotated and is connected with catch bar 1111, and the one end that catch bar 1111 kept away from curved bar 1110 rotates with the outside of second connecting rod 115 to be connected, through setting up clearance mechanism 11, is convenient for better to the filter 12 outside filter the inside dust in hole 13 clear up.

Further, the bottom of the air inlet pipe 3 is fixedly connected with a cleaning pipe 14 on one side of the filter plate 12, the top of the cleaning pipe 14 extends to the inside of the air inlet pipe 3, a flashboard 15 is fixedly mounted on the outer side of the cleaning pipe 14, the cleaning pipe 14 is convenient to clean dust inside the air inlet pipe 3 better, and the cleaning pipe 14 can be opened and closed better through the flashboard 15.

Furthermore, the half part outside the driving gear 104 is provided with the tooth, and the tooth position outside the driving gear 104 is connected with driven gear 107 meshing, and the diameter ratio of driving gear 104 and driven gear 107 is one to two, and the better cooperation torsion spring 108 of being convenient for uses to drive guide plate 1010 and make a round trip to reciprocate to swing.

Further, the size of clearance needle 116 all is less than the size of filtration pore 13, and clearance needle 116 all is located the one side of the filtration pore 13 that corresponds, is convenient for better the dust to filtration pore 13 inside clear up through clearance needle 116.

Furthermore, first servo motor 103, second servo motor 118 all with external control box electric connection, be convenient for better control the equipment is whole through external control box.

Specifically, the method comprises the following steps: firstly, the equipment is installed at a specified position, then the first servo motor 103 and the second servo motor 118 are respectively electrically connected with an external control box, then the equipment is electrified, an external air source is introduced into the equipment through the air inlet pipe 3, the air source is firstly filtered through the filter plate 12, dust stays at one side of the filter plate 12, the air source enters the air inlet pipe 3 through the filter holes 13, and then the air source is directly blown to the outer side of the buffer plate 4 to push the buffer plate 4 to rotate, so that the support rod 9 is pushed to rotate, the slide block 7 is pushed to move on the outer side of the first slide rod 6 through the support rod 9, meanwhile, the return spring 8 is extruded, the movement of the slide block 7 is buffered through the elastic action of the return spring 8, so that the rotation of the buffer plate 4 is better buffered, the air source passing through the buffer plate 4 is blown to the outer side of the guide plate 1010, and is shunted through the diversion grooves 1011 outside the guide plate 1010, meanwhile, the external control box controls the first servo motor 103 to work to drive the driving gear 104 to rotate, so as to drive the driven gear 107 and the rotating shaft 105 to rotate through the teeth on the outer side of the driving gear 104, when the rotating shaft 105 rotates, the torsion spring 108 is extruded through the matching of the first fixing rod 106 and the second fixing rod 109, when the teeth on the outer side of the driving gear 104 are not meshed with the driven gear 107, the rotating shaft 105 is driven to reversely return under the action of the torsion spring 108, the operation is continuously repeated, so as to complete the reciprocating swing operation of the guide plate 1010, and further perform uniform flow guiding operation on a wind source, after long-term use, dust is accumulated on the outer side of the filter plate 12, when the filter hole 13 is blocked, the external control box controls the second servo motor 118 to rotate, so as to drive the first rotating rod 117, the second rotating rod 119 and the bent rod 1110 to rotate, and then promote clearance frame 113 through the effect of catch 1111 and carry out reciprocating motion, drive clearance needle 116 through the removal of clearance frame 113 and remove, run through corresponding filtration hole 13 through clearance needle 116, can dredge filtration hole 13, then can open flashboard 15, clear up the dust that drops through clearance pipe 14.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a even air inlet unit of elbow for air inlet system in stove, includes return bend (1), its characterized in that, return bend (1) comprises exhaust pipe (2) and air-supply line (3) jointly, just the bottom of exhaust pipe (2) and the one end fixed connection of air-supply line (3), the one end rotation that the bottom of air-supply line (3) inner wall is close to exhaust pipe (2) is connected with buffer board (4), the bottom of air-supply line (3) inner wall just is located one side fixedly connected with fixed plate (5) of buffer board (4), fixedly connected with first slide bar (6) between the inner wall of fixed plate (5) and exhaust pipe (2), the outside sliding connection of first slide bar (6) has slider (7), the outside of first slide bar (6) just is located the cover and has return spring (8) between the inner wall of slider (7) and exhaust pipe (2), inner wall fixed connection of the one end of slider (7) and exhaust pipe (2) is kept away from in return spring (8), the one end and slider (7) fixed connection of exhaust pipe (2) inner wall are kept away from in return spring (8), the outside of slider (7) is rotated and is connected with bracing piece (9), the one end that slider (7) were kept away from in bracing piece (9) is rotated with the bottom of buffer board (4) and is connected, the outside of exhaust pipe (2) and the top that is located buffer board (4) are provided with even water conservancy diversion mechanism (10), the one end fixedly connected with filter (12) of exhaust pipe (2) are kept away from in air-supply line (3), filtration hole (13) have been seted up to the outside equidistance of filter (12), the inside of air-supply line (3) and the one side that is located filter (12) are provided with clearance mechanism (11).

2. The elbow uniform air inlet device for the air inlet system in the furnace as claimed in claim 1, wherein the uniform flow guiding mechanism (10) comprises a mounting box (101), the mounting box (101) is fixedly connected to the outer side of the exhaust pipe (2) and located above the buffer plate (4), heat dissipation holes (102) are formed in the bottom of the mounting box (101) at equal intervals, a first servo motor (103) is fixedly installed on one side, away from the exhaust pipe (2), of the inner wall of the mounting box (101), a driving gear (104) is fixedly connected to an output shaft of the first servo motor (103), a rotating shaft (105) is rotatably connected to the inner wall of the mounting box (101) and located above the first servo motor (103), a driven gear (107) is fixedly connected to the outer side of the rotating shaft (105), and a first fixing rod (106) is fixedly connected to the inner wall of the mounting box (101) and located between the first servo motor (103) and the rotating shaft (105), one side fixedly connected with second dead lever (109) of exhaust pipe (2) is kept away from at the top of driven gear (107), one side cover that the outside of axis of rotation (105) just is located driven gear (107) has torque spring (108), the one end overlap joint in the outside of first dead lever (106) of driven gear (107) is kept away from in torque spring (108), the one end overlap joint in the outside of second dead lever (109) of first dead lever (106) is kept away from in torque spring (108), the one end that axis of rotation (105) are close to exhaust pipe (2) extends to inside and fixedly connected with guide plate (1010) of exhaust pipe (2), one side equidistance that axis of rotation (105) was kept away from in guide plate (1010) has seted up guiding gutter (1011).

3. The elbow uniform air inlet device for the air inlet system in the furnace according to claim 2, wherein the cleaning mechanism (11) comprises a sliding groove (111), the sliding groove (111) is formed on the top and the bottom of the inner wall of the air inlet pipe (3) and located on one side of the filter plate (12), a second sliding rod (112) is slidably connected inside the sliding groove (111), a cleaning frame (113) is slidably connected between the two second sliding rods (112), the cleaning frame (113) is slidably connected with the sliding groove (111), a first connecting rod (114) is fixedly connected to each end inside the cleaning frame (113), a second connecting rod (115) is fixedly connected inside the cleaning frame (113) and located between the two first connecting rods (114), and cleaning needles (116) are fixedly connected to the first connecting rods (114) and the second connecting rods (115) at equal intervals on the sides close to the filter plate (12), the bottom of air-supply line (3) inner wall just is located one side rotation of spout (111) and is connected with first dwang (117), the top of air-supply line (3) inner wall just is located one side rotation of spout (111) and is connected with second dwang (119), the top fixed mounting that the top of air-supply line (3) just is located second dwang (119) has second servo motor (118), the output shaft of second servo motor (118) extend to the inside of air-supply line (3) and with second dwang (119) fixed connection, fixedly connected with curved bar (1110) between second dwang (119) and first dwang (117), the outside of curved bar (1110) is rotated and is connected with catch bar (1111), the one end that curved bar (1110) were kept away from in catch bar (1111) is rotated and is connected with the outside of second connecting rod (115).

4. The elbow uniform air inlet device for the air inlet system in the furnace as claimed in claim 1, wherein a cleaning pipe (14) is fixedly connected to the bottom of the air inlet pipe (3) and located at one side of the filter plate (12), the top of the cleaning pipe (14) extends to the inside of the air inlet pipe (3), and a shutter plate (15) is fixedly installed on the outer side of the cleaning pipe (14).

5. The elbow uniform air inlet device for the air inlet system in the furnace as claimed in claim 2, wherein teeth are arranged at one half part of the outer side of the driving gear (104), the teeth part of the outer side of the driving gear (104) is in meshed connection with the driven gear (107), and the diameter ratio of the driving gear (104) to the driven gear (107) is one to two.

6. The elbow uniform air inlet device for the air inlet system in the furnace as claimed in claim 3, wherein the size of the cleaning needles (116) is smaller than that of the filter holes (13), and the cleaning needles (116) are located on one side of the corresponding filter holes (13).

7. The elbow uniform air inlet device for the furnace air inlet system according to claim 3, wherein the first servo motor (103) and the second servo motor (118) are electrically connected with an external control box.

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