CN221279934U - Electric arc furnace capable of automatically opening and closing sand filling port - Google Patents

Abstract

The utility model relates to an electric arc furnace capable of automatically opening and closing a sand filling port, wherein a sand filling port, a guide sliding rail and a sliding plate which is in sliding fit with the guide sliding rail are arranged on a furnace shell in an eccentric region of the electric arc furnace, a sand filling port cover is arranged at the front end of the sliding plate, and a sliding driving mechanism is arranged on the sliding plate, so that the sand filling port cover is provided with an online position for plugging the sand filling port and an offline position far away from the sand filling port, and the guide direction of the guide sliding rail is obliquely upward. The utility model adopts the mode that the sand filling port cover slides to open and close the sand filling port, thus the required operation space is small, and the interference to related equipment above the sand filling port cover is avoided; the guide slide rail is obliquely designed, when the sand filling port cover runs from an online position to an offline position, the sand filling port cover can be separated from the surface of the furnace shell around the sand filling port in real time, so that the sand filling port cover can be effectively protected, and the service life of the sand filling port cover is prolonged; when the sand filling port cover runs from an offline position to an online position, the sand filling port cover can be pressed on the sand filling port from the upper part, so that the blocking effect is ensured.

Description

Electric arc furnace capable of automatically opening and closing sand filling port

Technical Field

The utility model belongs to the technical field of electric arc furnace production, and particularly relates to an electric arc furnace capable of automatically opening and closing a sand filling port.

Background

Most of the existing electric arc furnaces adopt a eccentric bottom tapping mode, and a sand filling mechanism is required to block a tapping hole before steel is discharged and steelmaking is performed again. At present, sand is filled at a sand filling hole right above a steel tapping hole, so that sand falls into the steel tapping hole; the sand filling port cover is generally arranged, so that the sand filling port can be plugged during smelting, and the escape of smoke, dust and the like is avoided. Considerable steel works still adopt manual sand filling operation, and the opening and closing operation of a sand filling cover is completed manually, so that the labor intensity is high, and safety accidents are easy to occur; in addition, for opening and closing the sand filling port, a mode of turning over the sand filling port cover is generally adopted, and the operation space required by the mode is relatively large, so that interference with field devices such as a sand filling device is easy to occur.

Disclosure of utility model

The utility model relates to an electric arc furnace capable of automatically opening and closing a sand filling port, which at least can solve part of defects in the prior art.

The utility model relates to an electric arc furnace capable of automatically opening and closing a sand filling port, wherein the sand filling port is arranged on a furnace shell of an eccentric zone, a guide sliding rail and a sliding plate which is in sliding fit with the guide sliding rail are arranged on the furnace shell of the eccentric zone, a sand filling port cover is arranged at the front end of the sliding plate, and a sliding driving mechanism is configured on the sliding plate, so that the sand filling port cover has an online position for blocking the sand filling port and an offline position far away from the sand filling port, and the guide direction of the guide sliding rail is in an inclined upper direction from the offline position to the online position.

As one of the implementation modes, the sliding plate is provided with a sand filling hopper; when the sand filling port cover is in an off-line position, the blanking port of the sand filling hopper is opposite to the sand filling port.

As one of the embodiments, the electric arc furnace further comprises a sand storage hopper, wherein the sand storage hopper is positioned above the sand filling hopper, and the sand storage hopper is fixedly arranged right above the sand filling port or is provided with a sand storage hopper driving unit for driving the sand storage hopper to be close to or far away from the sand filling port.

As one embodiment, the capacity of the sand storage hopper is N times of the sand amount required by a single sand filling operation, and N is more than 1.

As one embodiment, the sand storage hopper is fixed on the furnace cover lifting device.

As one embodiment, the slide driving mechanism includes a slide driving unit and a protective cover that covers the slide driving unit inside.

As one embodiment, the slide driving unit employs a cylinder or a hydraulic cylinder.

The utility model has at least the following beneficial effects:

In the utility model, the sand filling port cover slides to open and close the sand filling port, so that the required operation space is small, and interference to related equipment above the sand filling port cover is avoided. The guide slide rail is obliquely designed, when the sand filling port cover runs from an online position to an offline position, the sand filling port cover can be separated from the surface of the furnace shell around the sand filling port in real time, so that the sand filling port cover can be effectively protected, and the service life of the sand filling port cover is prolonged; when the sand filling port cover runs from an offline position to an online position, the sand filling port cover can be pressed on the sand filling port from the upper part, so that the blocking effect is ensured.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic layout view of an automatic sand filling device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the structure of FIG. 1;

FIG. 3 is a front view of an automatic sand filling device according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of an automatic sand filling device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing the sand filling hopper in the waiting position and the sand filling position.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, an embodiment of the present utility model provides an arc furnace with an automatic sand filling opening, wherein a sand filling opening is provided on a furnace shell 100 in an eccentric area, a guide sliding rail 210 and a sliding plate 215 slidingly matched with the guide sliding rail 210 are provided on the furnace shell 100 in the eccentric area, a sand filling cover 203 is provided at a front end of the sliding plate 215, and the sliding plate 215 is provided with a sliding driving mechanism, so that the sand filling cover 203 has an on-line position for blocking the sand filling opening and an off-line position far away from the sand filling opening.

The guide rail 210 is preferably directly installed on the water-cooling coil pipe of the eccentric zone furnace shell 100, specifically in the water-cooling coil pipe zone 101 at the top of the eccentric zone furnace shell 100; sand filling ports are also provided in the water cooled coil section 101.

When the sand filling port cover 203 is in an on-line position, the sand filling port can be plugged, so that the escape of smoke, dust and the like can be prevented during the smelting production of the electric arc furnace; when the sand filling port cover 203 is in the off-line position, the sand filling port is correspondingly opened, and at this time, sand filling operation can be performed.

The front end of the sliding plate 215 specifically refers to the end of the sliding plate 215 near the sand filling port when the sand filling port cover 203 is in the offline position.

Preferably, as shown in fig. 3-5, the guide rail 210 is inclined, and has an included angle greater than 0 degrees with the horizontal plane, and specifically, the guide direction of the guide rail 210 is an upward direction from the off-line position to the on-line position. Based on the structure, when the sand filling port cover 203 runs from the online position to the offline position, the sand filling port cover 203 can be separated from the surface of the furnace shell 100 around the sand filling port in real time, so that the sand filling port cover 203 can be effectively protected, and the service life of the sand filling port cover 203 can be prolonged; when the sand filling port cover 203 runs from an off-line position to an on-line position, the sand filling port cover 203 can be pressed on the sand filling port from the upper side, and the blocking effect is ensured.

The slide driving mechanism 211 includes, but is not limited to, a driving device such as an air cylinder or a hydraulic cylinder; preferably, the sliding driving mechanism 211 further includes a protection cover 204 for protecting the driving device from damage caused by high temperature, dust, and the like.

Further preferably, as shown in fig. 1-5, the sliding plate 215 is provided with a sand filling hopper 201; when the sand filling port cover 203 is in an off-line position, the discharging port of the sand filling hopper 201 is opposite to the sand filling port; when the sand filling port cover 203 is in the on-line position, the sand filling hopper 201 is far away from the sand filling port.

Based on the structure, the opening and closing of the sand filling opening and the sand filling operation can be coupled, the response speed is high, the action coordination is high, the sand filling operation efficiency can be effectively improved, and the required driving equipment is reduced.

Under the action of the sliding driving mechanism 211, the sand filling hopper 201 has a sand filling position where the discharge opening is opposite to the sand filling opening and a standby position where the discharge opening is far away from the sand filling opening.

In the sand filling position, the blanking opening of the sand filling hopper 201 is closely adjacent to the sand filling opening, so that the blanking reliability can be ensured, and compared with the existing automatic sand filling equipment, in the embodiment, the blanking opening of the sand filling hopper 201 can correspondingly realize large-caliber design, and the sand filling efficiency can be improved.

Preferably, the guiding sliding rail 210 comprises two rails respectively arranged at two sides of the sand filling opening, and the sliding plate 215 is respectively in sliding fit with the two rails; the sliding plate 215 is provided with a relief hole, the blanking opening of the sand filling hopper 201 can be in butt joint with the top end of the relief hole, or can be flush with the bottom end of the relief hole or positioned below the relief hole, so that the blanking requirement can be met.

Because the eccentric area is small in position, the sand filling hopper 201 cannot be designed to be too large to store the sand for multiple times, therefore, the sand storage hopper 202 is preferably designed above the sand filling hopper 201, the sand storage hopper 202 can be designed to have larger volume to accommodate the sand for multiple times (namely, the capacity of the sand storage hopper 202 is N times of the sand amount required by single sand filling operation, N is more than 1, N can be an integer or a non-integer), and the sand storage can be carried out by directly replenishing the sand bag through the crown block, so that the complex operation of replenishing the sand for multiple times is avoided, and the production efficiency can be effectively improved. Wherein, the sand storage hopper 202 can be fixedly arranged right above the sand filling port, or is provided with a sand storage hopper driving unit for driving the sand storage hopper to be close to or far away from the sand filling port; including but not limited to, securing the sand magazine 202 to the furnace lid lifting device or surrounding areas that do not interfere with the production operation, as the case may be.

Further preferably, as shown in fig. 1 to 5, the sand filling hopper 201 is provided with a blanking control valve 212, and a linkage mechanism for matching the opening and closing actions of the blanking control valve 212 with the station switching actions of the sand filling hopper 201 is configured.

The blanking control valve 212 includes, but is not limited to, a flap valve, and the center of the circular flap is located on the axis of the sand filling hopper 201; preferably, when the circular turning plate is in a horizontal position (the plate surface is parallel to the horizontal plane), the sand filling hopper 201 is in a sand storage state, and when the circular turning plate rotates, discharging can be realized.

The linkage mechanism is used for enabling the opening and closing actions of the blanking control valve 212 to be matched with the station switching actions of the sand filling hopper 201, namely:

when the sand filling hopper 201 is at the standby position, the blanking control valve 212 is in a closed state;

When the sand filling hopper 201 is positioned at the sand filling position, the blanking control valve 212 is in an opened state;

Preferably, when the sand filling hopper 201 is at the sand filling position, the blanking control valve 212 is opened to the maximum opening; for this case, preferably, during the process of running the sand filling hopper 201 from the standby position to the sand filling position, when the blanking port is just completely located right above the sand filling port, the blanking control valve 212 starts to open, and when the blanking port is coaxial with the sand filling port, the blanking control valve 212 opens to the maximum opening.

In one embodiment, as shown in fig. 1-3 and fig. 5, the linkage mechanism includes a rotary actuating rod 206 for driving the blanking control valve 212 to open and close, a follower assembly fixedly connected to the rotary actuating rod 206, and an energizing structure capable of enabling the follower assembly to drive the rotary actuating rod 206 to rotate, where the energizing structure is disposed on the guide sliding rail 210.

Taking a flap valve as an example of the blanking control valve 212, the rotary actuating rod 206 is connected with the circular flap, and can drive the circular flap to turn over.

The above-mentioned energizing structure mainly drives the follower assembly to rotate, and further drives the rotation actuating rod 206 to rotate. The energizing structure can adopt an active energizing mode or a passive energizing mode; wherein the interaction of the follower assembly with the energizing structure is preferably achieved by sliding movement of the sand hopper 201, which saves driving equipment, is highly reliable, and saves costs, e.g. the follower assembly is interfered by the energizing structure during operation of the sand hopper 201, resulting in interaction of the two.

In one embodiment, as shown in fig. 3 and 5, the follower assembly includes a V-shaped bracket 207 and two follower rollers 209, wherein the angular ends of the V-shaped bracket 207 are connected to the rotation actuating rod 206, the two follower rollers 209 are respectively disposed at two leg ends of the V-shaped bracket 207, and the axis of the follower rollers 209 is parallel to the axis of the rotation actuating rod 206.

The leg ends of the V-shaped bracket 207 are preferably positioned below the corner ends.

The angular ends of the V-shaped brackets 207 are preferably connected to the ends of the rotary actuator rod 206 to achieve a high torque.

Wherein the biasing structure preferably urges the follower assembly to rotate by interference with the follower roller 209. Preferably, as shown in fig. 1-5, the energizing structure includes a baffle 205 protruding on the guide rail 210, where the baffle 205 is located so as to interfere with the follower roller 209 on the front side; defining two follower rollers 209 as a first roller 2091 and a second roller 2092, the first roller 2091 being connected to a first strut and the second roller 2092 being connected to a second strut; when the sand hopper 201 is in the standby position, the second roller 2092 is located between the first roller 2091 and the baffle 205, and the baffle 205 is located so as to interfere with the second roller 2092. That is, the set position of the shutter 205 satisfies: when the sand filling hopper 201 is positioned at the waiting position, the distance between the sand filling hopper 201 and the sand filling position is larger than the distance between the baffle 205 and the adjacent follow-up roller 209; more specifically, the distance of travel of the sand filling hopper 201 from the standby position to the sand filling position is d1, and the distance between the second roller 2092 and the baffle 205 when the sand filling hopper 201 is at the standby position is d2, where d1 > d2.

In the process that the sand filling hopper 201 moves from the standby position to the sand filling position, the second roller 2092 is firstly contacted with the baffle 205, and along with the further forward movement of the sand filling hopper 201, the second roller 2092 rolls on the baffle 205, and meanwhile, the interaction force between the second roller 2092 and the baffle 205 makes the V-shaped bracket 207 rotate, so that the rotation actuating rod 206 is driven to rotate.

Further preferably, as shown in fig. 1-3 and fig. 5, the guide rail 210 is further provided with a retaining plate 208 for the follower roller 209 to walk, and an upper surface of the retaining plate 208 is parallel to a guiding direction of the guide rail 210; from the standby position to the sand filling position, the retaining plate 208 is located upstream of the energizing structure, for example, the retaining plate 208 is located on the side of the baffle 205 near the standby position.

Wherein, during the process of the sand filling hopper 201 moving from the standby position to the sand filling position, the follower rollers 209 roll on the holding plate 208, and the two follower rollers 209 form a bidirectional support, so that the rotation of the rotary execution rod 206 can be prevented; when the second roller 2092 interferes with the shutter 205, the first roller 2091 contacts the retaining plate 208, and the V-bracket 207 swings upward instead of downward, and the second roller 2092 then rolls upward on the shutter 205 and further swings the V-bracket 207 upward.

The height of the baffle 205 should meet the requirement of the maximum opening of the blanking control valve 212, that is, it should be avoided that the blanking control valve 212 cannot be opened to the maximum opening due to interference of the baffle 205 to rotation of the second support rod, which can be determined and adjusted according to factors such as the swing angle of the V-shaped bracket 207, the length of the second support rod, the included angle between the second support rod and the horizontal plane when the second roller 2092 contacts the baffle 205, and the movement stroke of the sand filling hopper 201 when the blanking control valve 212 is opened to the maximum opening; including but not limited to: when the sand hopper 201 is operated to the sand filling position, the second roller 2092 rolls just to the top of the baffle 205.

Preferably, as shown in fig. 3, a certain distance is provided between the retaining plate 208 and the baffle 205, so that the smoothness of rotation of the second roller 2092, the second strut and the V-shaped bracket 207 can be ensured.

Preferably, the guide rail 210 includes a rail seat and a rail disposed in the rail seat; the retaining plate 208, the baffle 205 may be mounted on the rail seat.

Further preferably, the linkage mechanism further comprises a reset structure for resetting the follower assembly after rotation. The reset structure includes, but is not limited to, the use of a weight that may be mounted at the corner of the V-bracket 207, on the first bracket, etc.

Based on the above scheme, the V-shaped bracket 207 with the follow-up roller 209 is matched with the baffle 205, so that the rotary actuating rod 206 can be driven to rotate to realize the opening and closing of the blanking control valve 212, the structure is simple, and the pure mechanical structure has very high working reliability.

In one embodiment, as shown in fig. 4, the sliding plate 215 is further provided with a visualization unit 213, and in the sand filling position, the visualization unit 213 is located directly above the sand filling hole, which can clearly observe the sand filling condition of the steel tapping hole in the electric arc furnace, and ensure the reliability, accuracy and safety of the sand filling operation. The above-mentioned visualization unit 213 includes, but is not limited to, employing an industrial camera or the like; the visualization unit 213 is communicated with the control center, and can automatically judge whether sand filling is needed to be continued or not directly through an image recognition mode, and can judge whether sand filling is completed or not through manually checking image information returned by the visualization unit 213.

Further, in order to ensure good visual effect and protect the visualization unit 213 from high temperature, a blowing pipe 214 may be provided beside to cool the apparatus and keep the visualization unit 213 clean by blowing cooling gas; the lance 214 may be normally open.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (7)

1. An electric arc furnace capable of automatically opening and closing a sand filling port is characterized in that the sand filling port is arranged on a furnace shell of an eccentric zone of the electric arc furnace, and the electric arc furnace is characterized in that: the eccentric area stove outer covering is equipped with the direction slide rail and with direction slide rail sliding fit's sliding plate, the front end of sliding plate is equipped with the sand filling flap, the sliding plate disposes slide drive mechanism, so that the sand filling flap has shutoff the online position of sand filling opening and keep away from the off-line position of sand filling opening, from off-line position to online position, the direction of direction slide rail is the slant upward direction.

2. The electric arc furnace for automatically opening and closing a sand filling port according to claim 1, wherein: the sliding plate is provided with a sand filling hopper; when the sand filling port cover is in an off-line position, the blanking port of the sand filling hopper is opposite to the sand filling port.

3. The electric arc furnace for automatically opening and closing a sand filling port according to claim 2, wherein: the sand storage device comprises a sand filling port, and is characterized by further comprising a sand storage hopper, wherein the sand storage hopper is positioned above the sand filling hopper, and the sand storage hopper is fixedly arranged right above the sand filling port or is provided with a sand storage hopper driving unit for driving the sand storage hopper to be close to or far away from the sand filling port.

4. An electric arc furnace for automatically opening and closing a sand filling port as claimed in claim 3, wherein: the capacity of the sand storage hopper is N times of the sand amount required by a single sand filling operation, and N is more than 1.

5. An electric arc furnace for automatically opening and closing a sand filling port as claimed in claim 3, wherein: the sand storage hopper is fixed on the furnace cover lifting device.

6. The electric arc furnace for automatically opening and closing a sand filling port according to claim 1, wherein: the sliding drive mechanism comprises a sliding drive unit and a protective cover, wherein the protective cover covers the sliding drive unit.

7. The electric arc furnace for automatically opening and closing a sand filling port according to claim 6, wherein: the sliding driving unit adopts an air cylinder or a hydraulic cylinder.