KR20210019183A - Cover apparatus for a melt metallurgic furnace - Google Patents

Abstract

The present invention provides an ascending cover apparatus of a metal melting furnace which can reduce manufacturing costs of a metal melting furnace. The ascending cover apparatus of a metal melting furnace including a cover support installed on an upper portion of a metal melting furnace body on which a crucible is installed and a cover mounted on an upper portion of the cover support comprises: a plurality of support bodies installed on the upper surface of the cover support at prescribed intervals, and provided with a bearing installed therein; a plurality of screw shafts of which one end is axially installed on the support bodies to be perpendicularly installed with respect to the upper surface of the cover support; a medium plate having a shaft penetration hole through which each screw shaft is installed, and a plurality of connection bars installed at prescribed intervals and connected to the cover to lift and lower the cover; and a power transfer unit allowing the other end of each screw shaft to be bearing-fixed thereon, and including a sprocket wheel or a pulley installed on the other end of each screw shaft, a chain or a belt connecting the sprocket wheel or the pulley, and a motor power-connected to at least one screw shaft to transfer driving power such that each screw shaft receives power by the sprocket wheel or the pulley to rotate forwards and backwards.

Description

Elevating cover device for metal melting furnace{COVER APPARATUS FOR A MELT METALLURGIC FURNACE}

The present invention relates to an elevating cover device, and more particularly, without separately installing a locking means, as in the prior art, by raising and lowering the cover from the cover support seated on the upper part of the metal melting furnace body, thereby reducing the manufacturing cost of the metal melting furnace. The present invention relates to an elevating cover device for a metal melting furnace that can reduce savings and improve space utilization efficiency.

In general, metal melting furnaces with relatively low melting capacity include a crucible, a reflection furnace, an electric furnace, a cupola, and the like. Is divided. The aluminum melting furnace, which is a kind of metal melting furnace, heats and keeps aluminum melted by heating and dissolving aluminum and using a heating means such as electricity as an auxiliary furnace for the melting and maintaining complex function to keep the molten metal warm. There is a maintenance-only warming furnace to maintain.

Here, metal melting furnaces including conventional aluminum melting furnaces are changing from a burner type melting furnace that heats a crucible using diesel as a heat source to an electric melting furnace (heat retention furnace). In the electric metal melting furnace, a crucible for melting and storing the molten metal is built inside the melting furnace where insulation and refractory materials are overlapped to form multiple walls. At this time, in order to evenly heat the crucible and at the same time to prevent damage due to leaked molten metal when the crucible is damaged, a heating wire heating device that generates high temperature heat by applying power to the inner wall spaced a predetermined distance around the crucible is embedded. Has a configuration of heating the crucible to dissolve the metal or to maintain the dissolved molten metal at a constant temperature.

1 is a cross-sectional view showing a typical example of a conventional metal melting furnace.

Referring to FIG. 1, a cover 200 provided with an opening and closing means for opening and closing a conventional metal melting furnace, a body 100 in which a side wall and a floor are formed in multiple layers by overlapping an insulating material and a fireproof material, and the body ( It is configured to include a crucible 300 that is built in 100) to melt and store the molten metal, and a heating device 400 installed on the outer periphery of the crucible 300.

At this time, the cover 200 is configured to be warm while maintaining the temperature by filling the insulation 23 inside the cover 200, an opening and closing means for opening and closing is provided at the top. The opening and closing means is composed of a hinge-link type traction device 210 operated by an operation lever 220 on one side of the upper end of the body 100 so that the upper portion of the body 100 can be opened and closed as necessary.

However, the conventional cover 200 has considerable difficulty in opening and closing operations by the operation lever 220 and the traction device 210 which are opening and closing means. In other words, in the related art, after operating the operation lever 220 in an open state to open the cover 200, the operation of moving the cover 200 to the open position by the traction device must be performed, and in the reverse order of the opening operation. Since the sealing operation must be performed, there is considerable difficulty in the opening and closing operation. In particular, the metal melting furnace frequently performs the operation of discharging the molten metal in the crucible 300 and the operation of dissolving the molten metal in the crucible 300 by inserting the metal, at which time the cover 200 is opened and closed in the same manner as described above. As a result, there is another problem in that the work efficiency is deteriorated and heat loss of the molten metal occurs due to frequent opening of the cover.

On the other hand, in order to solve the above problems, in Korean Patent Application Publication No. 2014-0026183, as an opening and closing means for opening and closing the cover by lifting the cover up and down, a base, a post vertically erected on the base, and one end rotated vertically. The arm has the other end hingedly connected to the upper end of the post, the connection bar connecting one end of the arm and the upper part of the cover, and one end of the cylinder body or the cylinder rod is hinged to the post, and the cylinder body or cylinder One end of the other of the rods is hinged to the arm, and a'melting furnace device for nonferrous metals' has been proposed, provided with a cylinder that rotates the arm up and down with the appearance of the cylinder rod.

However, the above Korean Patent Publication No. 2014-0026183 has an opening and closing means separate from the body containing the molten metal in order to implement a method of lifting the cover in the up, down or left and right directions, thereby increasing the manufacturing cost of the melting furnace. In addition to acting as a factor, in order to separately install the body containing the molten metal and the opening/closing means, there is a problem in that space utilization efficiency is deteriorated because a large installation area must be secured compared to the existing one. In addition, in order to move the cover in the left and right direction, there is an inconvenience of manually moving the arm hinged on the upper end of the post.

In particular, in the Korean Patent Application Publication No. 2014-0026183, an outlet through which a ladle-shaped ladle for taking out the molten metal is inserted is formed in the cover so that the molten metal can be taken out without opening the cover, and heat dissipation through the outlet is minimized. Outlet to

An outlet plug can be installed in the ladle, and a configuration in which the outlet plug is opened only when the molten metal is taken out by a ladle is disclosed.

However, in the case of forming the outlet on the cover as described above, it is obvious that heat is released through the outlet, and unnecessary energy loss due to this heat loss, for example, occurs when the heating means must be continuously operated to maintain the molten metal at a constant temperature. There is a problem in that energy loss is caused. In addition, in the case of installing an outlet plug to prevent heat from being discharged, the outlet plug must be opened and closed in the same manner as described above every time the operation to discharge the molten metal, which is performed frequently, as a result, there is a problem of lowering the work efficiency.

Thus, the present invention is invented to solve the general problems of the conventional metal melting furnace cover device,

The problem to be solved by the present invention is to reduce the manufacturing cost of the metal melting furnace by allowing the cover to rise and fall from the cover support seated on the upper part of the metal melting furnace body without installing a separate locking means as in the prior art. It is to provide an elevating cover device for a metal melting furnace that can also improve efficiency.

Another problem to be solved by the present invention is a minimum space in which the raw material of the molten metal can be input or a ladle for removing the molten metal can be input, and only all or part of the cover is raised or lowered, but all or part of the cover is opened and closed. It is to provide an elevating cover device for a metal melting furnace that can improve thermal efficiency and improve work efficiency by eliminating manual work in the process.

As a specific means of the present invention for solving the above problems;

In the cover apparatus for a metal melting furnace comprising a cover support installed on an upper portion of a metal melting furnace body in which a crucible is installed, and a cover seated on the upper part of the cover support,

A plurality of supports are installed at predetermined intervals on the upper surface of the cover support, and bearings are installed;

A plurality of screw shafts each and one end of each shaft are fixed to the support and vertically installed with respect to an upper surface of the cover support;

An intermediate plate provided with a shaft through hole through which each of the screw shafts is installed, and a plurality of connecting rods connected to the cover to lift and lower the cover are installed at predetermined intervals; And

The other end of each screw shaft is fixed with a bearing, and a sprocket wheel or pulley installed at the other end of each screw shaft, a chain or belt connecting the sprocket wheel or pulley, and at least one screw shaft are power-connected to each screw shaft A power transmission unit including a motor for transmitting driving force to rotate forward and reverse by receiving power by the sprocket wheel or pulley; It is provided with an elevating cover device of the metal melting furnace, characterized in that configured to include.

In a preferred embodiment, the connecting rod has one end screwed to a screw fastener provided on the cover, and the other end coupled to the intermediate plate is screwed by a fixing nut to be separated from the cover, and the cover Any one of a disc-shaped, half-moon, and center-separated cover can be applied.

As a specific other means of the present invention for solving the above problems;

In the cover apparatus for a metal melting furnace comprising a cover support installed on an upper portion of a metal melting furnace body in which a crucible is installed, and a cover seated on the upper part of the cover support,

At least one pneumatic cylinder or hydraulic cylinder is installed on the upper side of the body;

An intermediate plate having one end connected to the piston rod of the pneumatic cylinder or the hydraulic cylinder and to which a guide rod for guiding the lifting and lowering operations is connected; And

A plurality of connecting rods having one end connected to the intermediate plate and the other end connected to the cover in order to raise and lower the cover; It includes, wherein the connecting rod is one end screwed to a screw fastener provided on the cover, the other end coupled to the intermediate plate is screwed by a fixing nut, characterized in that the metal configured to be separated from the cover Equipped with an elevating cover device of the melting furnace.

The elevating cover device for a metal melting furnace according to the present invention is provided on the cover at the cover support seated on the upper part of the metal melting furnace body, so that the cover is raised and lowered, so that it is not necessary to separately install a locking means as in the prior art. There is an effect of reducing unit cost and improving space utilization efficiency. In addition, only all or part of the cover is raised or lowered, but by excluding manual work from the cover opening and closing operation, a quick opening and closing operation can be performed, thereby improving thermal efficiency and improving work efficiency.

1 is a cross-sectional view showing a typical example of a conventional metal melting furnace.
2A and 2B are perspective views for explaining a first embodiment of an elevating cover device for a metal melting furnace according to the present invention.
3 is a combined cross-sectional view for explaining a first embodiment of the elevating cover device for a metal melting furnace according to the present invention.
Figure 4 is a cross-sectional view for explaining the operating state of the first embodiment of the elevating cover device for a metal melting furnace according to the present invention.
FIG. 5A is a schematic diagram illustrating an exemplary configuration of an elevating cover device for a metal melting furnace according to the present invention. FIG.
5B is a schematic diagram illustrating a configuration of a main part for explaining another embodiment of the cover in the first embodiment of the elevating cover device for a metal melting furnace according to the present invention.
6 is a cross-sectional view for explaining a second embodiment of the elevating cover device for a metal melting furnace according to the present invention.
7 is an operational state diagram for explaining the operational state of the second embodiment of the elevating cover device for a metal melting furnace according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, the metal melting furnace applied to the present invention is an electric metal melting furnace, for example, an electric metal melting furnace in which a crucible for melting and storing the molten metal is embedded inside a body (melting furnace) in which a wall is formed in multiple layers by overlapping insulation and refractory materials. At this time, the main body (melting furnace) is a structure in which the heating wire heating device is installed on the inner wall, and as a whole, it is composed of a cylindrical body or a square body and a polygonal body that only the upper part where the cover device is installed is opened.In the present invention, The main body will be described as a preferred embodiment.

<First Example>

2A, 2B, and 3, the lifting and lowering cover device 1 according to the first embodiment of the present invention includes a cover support 30 mounted on the upper part of the main body 20 of the metal melting furnace 10. ) And the cover (40), and includes a support (2), a screw shaft (3), an intermediate plate (4), and a power transmission unit (5).

Here, the lifting and lowering cover device 1 of the present invention has a structure in which an insulation material and a refractory brick are multiplely stacked inside a case made of a polygonal body, and a heating wire heating device 20a is installed on the inner wall to constitute a melting furnace. It is configured to include a crucible (50) that is built into the body 20 in a replaceable manner. In addition, the body 20 made of a polygonal body has a cover support 30 at the top that is opened, for example, a cover support 30 configured in a ring shape to support the cover 40, and the cover support 30 ) Is configured to include a disk-shaped cover 40 that is seated.

At this time, the lifting and lowering cover device 1 of the present invention is installed to raise and lower the cover 40 in the cover support 30, as described above, the support 2, the screw shaft 3, and , A medium plate (4) and a power transmission unit (5).

A plurality of the supports 2 are installed on the upper surface of the cover support 30 at predetermined intervals. The support 2 is preferably made of a material that is resistant to heat, that is, a material that can minimize thermal deformation, and is coupled to the cover support 30 in a long, detachable manner, and a bearing B is installed inside. . At this time, in the case of installing the support body 2 at a predetermined interval on the cover support 30, it is preferable to install three at 180° intervals, and in addition, two or four at 90° intervals may be installed.

The screw shaft 3 is a shaft in which a screw is formed at the outer periphery, and one end of each shaft is fixed to the support 2 (shaft fixed by a bearing B). In other words, the screw shaft 3 is installed in the same number as the support body 2, and is vertically installed on the cover support 30 with respect to the upper surface. In this case, the length of the screw shaft 3 is preferably set so as to provide a space for discharging the molten metal by raising and lowering the cover 40 and inserting the ladle into the crucible 50.

The intermediate plate 4 is composed of a triangular body in which a shaft through hole 41 is provided so that the screw shaft 3 to which three is applied is installed through it as shown in FIGS. 2A and 2B. At least three connecting rods 42, that is, a plurality of connecting rods 42 connected to the covers 40 to move up and down the cover 40, are installed in the intermediate plate 4 at predetermined intervals. At this time, the connecting rod 42 has one end screwed to the screw fastener 40a provided on the cover 40, and the other end, that is, the other end coupled to the intermediate plate 4, is screwed by a fixing nut 421. It is fixed and configured to be separated from the cover 40. Here, the connection structure between the cover 40 and the intermediate plate 4 by the connection rod 42 is a structure in which the connection rod 42 can be separated from the cover 40 and the intermediate plate 4 in addition to the screw connection method. Any one can be applied.

The power transmission unit 5 is installed at the other end of each screw shaft 3. In such a power transmission unit 5, the other end of each screw shaft 3 is fixed to a bearing (B) in a triangular body 51, and the other end of each screw shaft 3 located in the body 51 The sprocket wheel 52 is installed or a pulley is installed, respectively. In addition, a chain 53 or a belt is installed on the sprocket wheel 52 or the pulley to be interconnected, and a motor 54 is power-connected to the other end of the at least one screw shaft 3. At this time, the power connection between the screw shaft 3 and the motor 54 is a method of directly connecting the screw shaft 3 to the shaft of the motor 54, and a method of connecting by a power transmission gear (not shown in the drawing). Alternatively, all other methods can be applied. On the other hand, the motor 54 is preferably fixed to the inner wall of the housing 51 for robust installation, and the housing 51 has a structure capable of separating the lid from the top for maintenance and repair. desirable. According to this configuration, the power transmission unit 5 is operated to transmit the driving force of the motor 54 to the respective screw shafts 3 by the sprocket wheel 52 or pulley. Each screw shaft 3 rotates forward and reverse at the same time by the forward and reverse rotation driving.

Accordingly, a working state of the elevating cover device according to the first embodiment of the present invention having the above configuration will be described.

Referring to FIG. 4, in the elevating cover device 1 according to the first embodiment of the present invention, one end of the screw shaft 3 is axially fixed to the support 2 provided in the cover support 30, and the screw shaft With the intermediate plate (4) installed in the center of (3), connect the intermediate plate (4) to the cover (40) by a connecting rod (42), and then to the other end of the screw shaft (3) Assembly is completed by installing 5).

In the elevating cover device 1 of the first embodiment, which has been assembled as described above, the cover 40 is lifted and opened when the molten metal in the crucible 50 is taken out by a ladle, and after the molten metal is taken out, the cover It performs the function of sealing by lowering (40). In detail, the operator drives the motor 54 when raising and lowering the cover 40, and the operator manipulates a separate operation panel (not shown in the drawings) for smooth control of the motor 54. It is desirable to provide it in an easy position. Thereafter, when the screw shaft 3 connected to the motor 54 rotates by the driving of the motor 54, the screw shaft 3 and the remaining screw shaft 3 connected by a chain 53 or a belt rotate at the same time. And, the intermediate plate 4 screwed to these screw shafts (3) converts the rotational motion of the screw shaft (3) into a linear motion and is operated up and down, and the connecting rod (42) coupled to the intermediate plate (4) ) By the cover 40 is raised and lowered to the open position. At this time, the raising and lowering height of the cover 40 is raised and lowered by a height sufficient to take out the molten metal by putting the ladle into the crucible 50. Thereafter, when the removal of the molten metal by the ladle is completed, the motor 54 is driven to rotate the screw shafts 3 in reverse, thereby returning the cover 40 to the sealed position by linear motion of the intermediate plate 4. Here, in order to open and seal the cover 40 to an accurate position, it is preferable to install a position sensor (not shown in the drawing) that senses the position of the intermediate plate 4 and controls the driving of the motor 54. However, it is preferable to install such a position sensor on the screw shaft (3).

On the other hand, the elevating cover device 1 according to the first embodiment of the present invention can separate only the cover 40 as necessary as the connecting rod 42 is connected to the cover 40 by screwing as described above. Since the cover device 1 is installed on the cover support 30, if the cover support 30 is separated from the body 20 by melting metal, the cover device 1 can also be separated from the body 20 by melting metal. There is.

Therefore, the elevating cover device 1 according to the first embodiment of the present invention is installed on the top of the cover support 30 and the cover 40 to raise and lower the cover 40, as in the conventional metal melting furnace. Compared to the opening and closing means installed separately from the main body 20, the manufacturing cost can be reduced, and space utilization efficiency can also be improved. In addition, the elevating cover device 1 of the present invention can improve work efficiency because the operator can quickly open and close the cover 40 only by controlling the motor 54 in the process of discharging the molten metal, which is frequently performed. have. In particular, if the cover 40 is quickly opened and sealed, heat loss can be minimized, thereby improving thermal efficiency.

5A and 5B, the cover 40 may have a half-moon type and a center-separable cover in addition to the disk shape as described above, and the elevating cover device of the present invention is also modified to correspond to the structural modification of the cover. This is possible. In other words, in the case of the half-moon-shaped cover 40' in which the half-moon-shaped, that is, the disk-shaped body is divided into two, as in FIG. You can raise or lower. In this case, the connecting rod 42 ′ can be easily connected by further providing an extension bar 43 on the intermediate plate 4. When a detachable cover 40" is provided in the center of the disk-shaped cover as shown in FIG. 5B, a number of connecting rods 42" are connected to the center detachable cover 40". The connecting rod 42 ′ can be easily connected to the intermediate plate 4 by providing an extension bar 43 ′ on the intermediate plate 4 at a position corresponding to the connecting rod 42 ″.

<Second Example>

6 and 7, the elevating cover device 1'according to the second embodiment of the present invention is a pneumatic cylinder or a hydraulic cylinder 6 as a driving means. At least one such pneumatic cylinder or hydraulic cylinder 6 is installed on the upper side of the metal melting furnace body 20. In addition, the intermediate plate 4 has one end connected to the piston rod 61 of the pneumatic or hydraulic cylinder 6 and a guide rod 62 for guiding the lifting and lowering operations. At this time, the development length of the piston rod 61 is sufficient as long as the cover can be opened so that the molten metal can be taken out by the ladle. In addition, the connecting rod 62 has one end connected to the intermediate plate 4 to raise and lower the cover 40, and the other end is connected to the cover 40, and the connecting rod 42 is the cover 40 One end is screwed to the screw fastener 40a provided in ), and the other end coupled to the intermediate plate 4 is screwed by a fixing nut 421 to be separated from the cover 40.

Accordingly, the elevating cover device 1'according to the second embodiment of the present invention as described above operates the pneumatic or hydraulic cylinder 6 by a separate operation panel to expand the piston rod 61, the intermediate plate ( 4) is interlocked and lifted, and the cover 40 connected to the intermediate plate 4 by the connecting rod 42 is lifted and opened. Thereafter, when the dispensing operation of the molten metal is finished, the expanded piston rod 61 is contracted to lower the intermediate plate 4 and the cover 40 to seal the cover 40.

Accordingly, the elevating cover device 1'according to the second embodiment of the present invention raises and lowers the intermediate plate 4 by a pneumatic or hydraulic cylinder 6 integrally installed in the body 20 of a metal melting furnace. Accordingly, compared to the opening and closing means separately installed from the metal melting furnace body 20 as in the prior art, manufacturing cost can be reduced, and space utilization efficiency can also be improved. In addition, the elevating cover device 1 ′ of the present invention improves work efficiency because the operator can quickly open and close the cover only by controlling the pneumatic or hydraulic cylinder 6 in the process of discharging the molten metal which is frequently performed. I can. In particular, if the cover 40 is quickly opened and sealed, heat loss can be minimized, thereby improving thermal efficiency.

In addition, the elevating cover device 1'according to the second embodiment of the present invention can be applied to a half-moon type and a center-separable cover in addition to the disk-shaped cover as described above, and corresponding to the structural modification of the cover, The elevating cover device can also be modified.

Meanwhile, the above-described embodiments are merely specific examples so that those skilled in the art can easily understand and implement the present invention, and are not intended to limit the scope of the present invention. Therefore, it should be noted that various modifications or changes can be made to the above-described embodiments. In principle, the scope of the present invention is determined by the claims to be described later.

1,1': elevating cover device 2: support
3: screw shaft 4: medium plate
5: power transmission unit 6: pneumatic cylinder or hydraulic cylinder
10: metal melting furnace 20: main body
30: cover support 40, 40', 40": cover
50: crucible 20a: heating wire heating device
40a: screw fastener 41: shaft through hole
42,42',42": connecting rod 43,43': extension bar
51: housing 52: sprocket wheel
53: chain 54: motor
61: piston rod 62: guide rod
421: fixing nut B: bearing

Claims (1)

A cover device for a metal melting furnace comprising a cover support installed on an upper part of the main body of the metal melting furnace in which a crucible is installed, and a cover seated on the upper surface of the cover support, and a plurality of them are installed at predetermined intervals on the upper surface of the cover support , A support on which the bearing is installed; A plurality of screw shafts each and one end of each shaft are fixed to the support and vertically installed with respect to an upper surface of the cover support; An intermediate plate having a shaft through hole through which each of the screw shafts is installed, and a plurality of connecting rods connected to the cover to lift and lower the cover are installed at predetermined intervals; And a sprocket wheel or pulley installed at the other end of each screw shaft, and the other end of each screw shaft is fixed to the bearing, and a chain or belt connecting the sprocket wheel or pulley, and is power-connected to at least one screw shaft to each screw. A power transmission unit including a motor for transmitting a driving force so that the shaft rotates forward or backward by receiving power by the sprocket wheel or pulley; In the elevating cover device for a metal melting furnace comprising a,
The connecting rod is configured such that one end is screwed to a screw fastener provided in the cover, the other end coupled to the intermediate plate is screwed by a fixing nut to be separated from the cover, and the cover is a disk-shaped, half-moon-shaped, Elevating cover device of a metal melting furnace, characterized in that any one of the center-separable cover is applied.

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