阅读说明：本技术 用于lf炉集尘罩的密封阀 (Sealing valve for LF furnace dust collecting hood ) 是由 陈靖 崔栋 黄震 刘玉德 于 2019-03-06 设计创作，主要内容包括：本发明涉及添加处理剂去除杂质的熔融铁类合金领域,具体为一种用于LF炉集尘罩的密封阀。一种用于LF炉集尘罩的密封阀,包括基座框架(1),基座框架(1)固定在集尘罩电极吊装孔的外缘上,其特征是：还包括导轨(2)、驱动装置(3)和阀体装置(4),两根导轨(2)分别固定在基座框架(1)的两侧,驱动装置(3)的壳体固定在基座框架(1)上,阀体装置(4)的两侧分别可移动地设于一根导轨(2)上,驱动装置(3)的移动端连接阀体装置(4)。本发明结构简单,安装方便,易于维护,安全可靠。(The invention relates to the field of molten iron alloy with a treating agent added to remove impurities, in particular to a sealing valve for a dust hood of an LF (ladle furnace). The sealing valve for the LF furnace dust hood comprises a base frame (1), wherein the base frame (1) is fixed on the outer edge of an electrode hoisting hole of the dust hood, and is characterized in that: the valve body device is characterized by further comprising guide rails (2), a driving device (3) and a valve body device (4), wherein the two guide rails (2) are fixed on two sides of the base frame (1) respectively, a shell of the driving device (3) is fixed on the base frame (1), two sides of the valve body device (4) are movably arranged on one guide rail (2) respectively, and the moving end of the driving device (3) is connected with the valve body device (4). The invention has simple structure, convenient installation, easy maintenance, safety and reliability.)

1. The sealing valve for the LF furnace dust hood comprises a base frame (1), wherein the base frame (1) is fixed on the outer edge of an electrode hoisting hole of the dust hood, and is characterized in that: the valve body device is characterized by further comprising guide rails (2), a driving device (3) and a valve body device (4), wherein the two guide rails (2) are respectively fixed on two sides of the base frame (1), a shell of the driving device (3) is fixed on the base frame (1), two sides of the valve body device (4) are respectively movably arranged on one guide rail (2), the moving end of the driving device (3) is connected with the valve body device (4), when the moving end of the driving device (3) retracts inwards to completely pull back the valve body device (4), the hoisting hole on the top end face of the conical section cover body (23) is opened, the valve body device (4) is in an open state, when the moving end of the driving device (3) extends outwards to push the valve body device (4) out completely, the hoisting hole on the top end face of the conical section cover body (23) is closed, the valve body device (4) is in a closed state, and the driving device (3) selects an electro-hydraulic push rod or an electric cylinder.

2. A sealing valve for an LF furnace dust cage according to claim 1, characterized in that: the guide rail (2) comprises a rail mounting plate (21), fastening bolts (22), a bottom rail plate (23), side rail plates (24) and a top rail plate (25), wherein the two sides of the base frame (1) are respectively fixed with one rail mounting plate (21), the bottom rail plate (23) is fixed on the rail mounting plate (21) through the fastening bolts (22), the bottom of the side rail plate (24) is fixed at one end of the bottom rail plate (23), one end of the top rail plate (25) is fixed at the top of the side rail plate (24), and the bottom rail plate (23), the side rail plate (24) and the top rail plate (25) form a T-shaped guide wheel groove (26);

the valve body device (4) comprises a guide wheel (41), a stop block (42), a guide wheel mounting plate (43), a valve body frame (44), a valve body panel (45), a fixed pressing plate (46), a connecting bolt (47), a rubber sealing plate (48) and a movable pressing plate (49), wherein the guide wheel (41) is rotatably arranged on one side of the guide wheel mounting plate (43) through a wheel shaft, the stop block (42) is arranged right above the guide wheel (41) on the guide wheel mounting plate (43), the two sides of the valve body frame (44) are respectively fixed on the other side of the guide wheel mounting plate (43), the valve body panel (45) is attached to the body frame (44), the four fixed pressing plates (46) are sequentially connected end to form a rectangular frame and are welded and fixed below the valve body panel (45), the rubber sealing plate (48) and the movable pressing plate (49) are sequentially attached to the outer side surface of the fixed pressing plate (46), The rubber sealing plate (48) and the movable pressing plate (49) are fixed by a connecting bolt (47);

the guide wheel (41) is embedded in the guide wheel groove (26) and rolls along the guide wheel groove (26), and a gap which is not more than 2mm is reserved between the bottom surface of the rubber sealing plate (48) and the top surface of the base frame (1).

Technical Field

The invention relates to the field of molten iron alloy with a treating agent added to remove impurities, in particular to a sealing valve for a dust hood of an LF (ladle furnace).

Background

The upper cover body of the dust collection cover of the LF furnace is integrally assembled on the wheel traveling mechanism, and the upper cover body is driven by the motor to move so as to leave the processing position and expose the refractory material in the center of the furnace cover, thereby meeting the requirements of online hoisting and electrode connection of a travelling crane.

The integral movement of the upper part of the smoke hood has the following disadvantages:

1. the upper part of the dust collection cover moves integrally to enable the electrode hole of the refractory piece in the center of the furnace cover to be exposed completely, the stroke of the upper cover body is large, the occupied space is large, and the implementation is difficult in a workshop with compact site.

2. The dust collecting pipe is arranged and moves along with the upper cover body, and the joint of the dust collecting pipe and a factory dust collecting pipeline is not easy to seal. Because the mounting precision and the positioning precision of the travelling mechanism of the dust hood are not high, a larger gap is usually reserved, and thus, more ineffective wild wind is drawn in the main pipeline in the working process of the dust removal system.

3. Because the travel in the walking direction is large, the cover body has large span in the direction perpendicular to the walking direction, the cover body has enough strength and rigidity, and the steel structure quantity is large; meanwhile, the running mechanism and the corresponding electrical control are complex, and the equipment investment and maintenance amount are large.

4. The upper cover body has high running position and large stroke, and has safety risk.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides auxiliary iron smelting equipment which is simple in structure, convenient to install, easy to maintain, safe and reliable.

The invention achieves the purpose by the following technical scheme:

the utility model provides a seal valve for LF stove dust cage, includes the base frame, and the base frame is fixed on the outer fringe of dust cage electrode hole for hoist, characterized by: the valve body device is in an open state, when the moving end of the driving device extends outwards to completely push the valve body device out, the lifting hole at the top end face of the cone section cover body is sealed, the valve body device is in a closed state, and the driving device selects an electro-hydraulic push rod or an electric cylinder.

The sealing valve for the LF furnace dust hood is characterized in that: the guide rail comprises a rail mounting plate, fastening bolts, a bottom rail plate, a side rail plate and a top rail plate, wherein two sides of the base frame are respectively fixed with one rail mounting plate;

the valve body device comprises a guide wheel, a stop block, a guide wheel mounting plate, a valve body frame, a valve body panel, a fixed pressing plate, a connecting bolt, a rubber sealing plate and a movable pressing plate, wherein the guide wheel is rotatably arranged on one side of the guide wheel mounting plate through a wheel shaft, the stop block is arranged right above the guide wheel on the guide wheel mounting plate, two sides of the valve body frame are respectively fixed on the other side of the guide wheel mounting plate, the valve body panel is attached to the valve body frame, the four fixed pressing plates are sequentially connected end to form a rectangular frame and are welded and fixed below the valve body panel, the rubber sealing plate and the movable pressing plate are sequentially attached to the outer side surface of the fixed pressing plate from inside to outside, and the;

the guide wheel is embedded in the guide wheel groove and rolls along the guide wheel groove, and a gap not larger than 2mm is reserved between the bottom surface of the rubber sealing plate and the top surface of the base frame.

The invention is arranged on the LF furnace dust collection cover and is used for opening and closing the electrode continuous hoisting hole above the LF furnace dust collection cover.

The invention has the main technical characteristics that:

1. the base frame is formed by welding profile steel according to the size of a dust hood electrode hoisting hole, and other components of the sealing valve are all arranged on the base.

2. The guide rails are C-shaped, are formed by splicing and welding steel plates and then are machined and symmetrically arranged;

the top rail plate, the bottom rail plate and the side rail plate are welded into a whole and are fixedly connected with the rail mounting plate through bolts.

3. The valve body device consists of guide wheels, stop blocks, a guide wheel mounting plate, a valve body frame, a valve body panel, a fixed pressing plate, connecting bolts, a rubber sealing plate and a movable pressing plate, wherein the guide wheels adopt 4 bidirectional combined type roller bearings and are fixedly mounted at four corners of the valve body frame through the guide wheel mounting plate; the stop block is welded on the guide wheel mounting plate after the position of the guide wheel is accurately adjusted; the valve body is formed by welding a valve body frame and a valve body panel, and the guide wheel mounting plates are welded at four corners of the valve body and used for mounting and fixing guide wheel assembly parts; the valve body sealing part consists of a fixed pressing plate, a connecting bolt, a rubber sealing plate and a movable pressing plate, wherein the fixed pressing plate is surrounded into a circle at four sides and is welded and fixed on a valve body panel, and a row of threaded holes are formed in the middle of the fixed pressing plate and are used for threaded connection and fixation of the bolt; the middle of the movable pressing plate is provided with 1 row of through holes for penetrating bolts and pressing the sealing plate; 4 rubber seal boards surround the fixed pressing board to form a circle, and 1 row of waist-shaped holes are formed in the middle of each seal board and used for adjusting the distance (which can be adjusted to be less than or equal to 2 mm) between the seal surface between each seal board and the base frame after the seal boards are installed.

4. The driving device adopts an electric cylinder or an electro-hydraulic push rod to drive the valve body to move in the guide rail; the connecting position of the rod head is arranged at the far end of the valve body as far as possible.

The invention has the following beneficial effects:

1. all components of the sealing valve are mounted on the base frame as a whole, and the sealing valve is convenient to install and maintain on site.

2. The guide wheel and the guide rail are designed to be guided in an upper direction, a lower direction and a side direction, so that the valve body can be prevented from being blocked in the opening and closing operation process.

3. The guide wheel mounting plate is provided with the stop block, so that the shearing force of the guide wheel assembly part connecting bolt can be reduced, and meanwhile, a positioning reference is provided for overhauling and reinstalling.

4. The movable pressing plate and the rubber sealing plate are movable, so that the sealing surface clearance of the sealing rubber plate can be adjusted, maintained and replaced conveniently.

5. The driving device adopts an electric cylinder or an electro-hydraulic push rod, and the action form is simple and reliable; the connection position of the rod head is close to the far end of the valve body as much as possible, so that the length of the basic frame can be effectively reduced, and the valve is compact.

Drawings

FIG. 1 is a schematic view of the valve body assembly of the present invention in an open position;

FIG. 2 is a schematic structural view of a valve body assembly of the present invention in a closed state;

FIG. 3 is a front view of the present invention;

FIG. 4 is an enlarged view of a portion of area A of FIG. 3;

fig. 5 is an isometric view of a valve body assembly of the present invention.

Detailed Description

The invention is further illustrated by the following specific examples.