Refractory filling device for furnace construction

Abstract

To provide a refractory filling device for furnace construction capable of efficiently and easily filling a back lining material into a cylindrical space or the like in a short time and without any hassle upon a furnace construction operation.SOLUTION: A refractory filling device 1 for furnace construction is assembled with: a fixed frame 2 to be fixed to a furnace body; a frame 5 for mounting tools 13, 13; vibration generation means 4 for vertically moving the frame 5; a housing 3 for storing the frame 5 and the vibration generation means 4; a motor 6 for rotating the housing 3 to the fixed frame 2; a thrust bearing 7 for making the housing 3 rotatable to the fixed frame 2; a V-belt 11 for transmitting the rotary power of the motor 6 to the housing 3; a coil spring 12 for relaxing the impact of the vertical movement of the frame 5 by the vibration generation means 4; or the like.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a filling device for filling a powdered refractory material (backlining material) into a cylindrical space formed between a furnace body and a sleeve when constructing an induction furnace or the like. [Background technology]

[0002] As a type of electric furnace, an induction furnace is known that utilizes heat generated by eddy currents due to electromagnetic induction. When constructing (constructing) such an induction furnace, it is necessary to fill the gap (cylindrical space) between the concave part (approximately cylindrical concave part) of the furnace body of the induction furnace and the cylindrical sleeve with a backlining material (castable or other unshaped refractory material), and then degas (mix to remove air bubbles inside) and press the backlining material. Conventionally, such degassing and pressing work of the backlining material was performed by multiple workers, but in order to perform the work efficiently, as shown in Patent Document 1, a furnace construction device has been developed in which a vibrator having a pressing tool is attached to each end of a frame branched into three, and the frame is rotatably installed relative to a frame fixed to the furnace body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 55-37401 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional furnace construction equipment such as that in Patent Document 1, the vibrators fixed to the frame separately degas and press the backlining material, making it difficult to degas and press the backlining material evenly (i.e., uniformly without causing differences in compression hardness depending on the location). In addition, since multiple vibrators are required, it is difficult to manufacture the equipment at low cost, and there is also the problem that the noise level during operation is high. In addition, when changing the degassing and pressing position of the backlining material during operation, the furnace construction equipment in Patent Document 1 requires the frame on which the three vibrators are installed to be pulled up by an air cylinder and rotated (manually), making the operation cumbersome.

[0005] The object of the present invention is to provide a refractory filling device for furnace construction that can easily fill a backlining material (unshaped refractory material such as castable) into a cylindrical space or the like during furnace construction work efficiently and without hassle in a short time (i.e., degas and press the backlining material), in order to solve the problems associated with the above-mentioned conventional furnace construction devices. [Means for solving the problem]

[0006] The present invention, as described in claim 1, is a filling device for filling a cylindrical space with powdered unshaped refractory material during construction of a furnace, and for degassing and pressing the material. The filling device comprises a fixed frame for fixing the device to the furnace body, a frame on which multiple tools for stirring and / or pressing can be attached, and a vibration generating means for moving the frame up and down. The vibration generating means and the disk body of the frame are housed in a cylindrical housing, and the housing is rotatable relative to the fixed frame. It is characterized by the above.

[0007] The invention as recited in claim 2 is characterized in that, in the invention as recited in claim 1, a rotation drive device is provided for rotating the frame relative to the fixed frame.

[0008] The invention described in claim 3 is the invention described in claim 1 or claim 2, characterized in that the frame has the tools attached in a hanging manner to the tips of a plurality of arms extending radially from the center of a disk body, and the upper surface of the disk body is fixed to the lower end of the operating shaft of the vibration generating means.

[0010] Claim 4 The invention described in Claims 1-3 In the invention described in any one of the above, an elastic member is provided on the lower surface of the disk body for absorbing the impact of vibrations generated by the vibration generating means. Effect of the Invention

[0011] The refractory filling device for furnace construction described in claim 1 is fixed to the furnace body by a fixing frame during furnace construction work, and multiple stirring and pressing tools attached to the frame are inserted into a cylindrical space formed in the furnace body (for example, the gap between the concave part of the furnace body and a cylindrical sleeve), and are moved up and down at the same time (synchronously and simultaneously) by a vibration generating means, thereby making it possible to degas and press (i.e., fill) backlining material such as castable refractory efficiently and easily within a short time without any hassle. In addition, in the furnace construction refractory filling device described in claim 1, the cylindrical housing containing the vibration generating means and the central part of the frame is rotatable relative to the fixed frame, so that the frame can be rotated smoothly in a horizontal plane without rattling up and down, and noise during the refractory filling operation can be reduced.

[0012] The refractory material filling device for furnace construction described in claim 2 can change the degassing and pressing position of the backlining material by rotating (pivoting) a frame equipped with multiple stirring and pressing tools relative to a fixed frame using a rotary drive device, so that the backlining material in the gap between the furnace body and the sleeve can be degassed and pressed very easily.

[0013] According to the furnace construction refractory material filling device described in claim 3, the vibration generated by the vibration generating means can be transmitted equally to each tool attached to each arm of the frame, so that the backlining material can be filled evenly into the gap between the furnace body and the sleeve (i.e., uniformly without causing differences in compression hardness, etc. depending on the location).

[0015] Claim 4 The refractory filling device for furnace construction described above is less susceptible to damage and can be used for a long period of time because the elastic member absorbs the impact of excessive vibrations caused by the vibration generating means, and it can effectively prevent destruction of the wall surface of the furnace body. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is an explanatory diagram (front view) showing a furnace construction refractory filling device. [Diagram 2] FIG. 2 is an explanatory diagram (plan view) showing a furnace construction refractory filling device. [Diagram 3] FIG. 2 is an explanatory diagram showing a furnace construction refractory packing device (a cross-sectional view taken along line AA in FIG. 1). [Figure 4] FIG. 3 is an explanatory diagram showing a furnace construction refractory packing device (a cross-sectional view taken along line BB in FIG. 2). [Diagram 5] FIG. 2 is an explanatory diagram showing a state in which the furnace construction refractory filling device is used. [Figure 6] FIG. 2 is an explanatory diagram showing a state in which the furnace construction refractory filling device is used. [Figure 7] FIG. 13 is an explanatory diagram showing a modified example of the furnace construction refractory filling device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a furnace construction refractory filling device (hereinafter simply referred to as a filling device) according to the present invention will be described in detail with reference to the drawings.

[0018] <Structure of the filling device> Figures 1 to 4 show an example of a filling device according to the present invention, and the filling device 1 is constructed by assembling a fixed frame 2 for fixing it to the furnace body, a frame 5 for mounting rod-shaped tools 13, 13, etc., a vibration generating means (cylinder) 4 for moving the frame 5 up and down, a housing 3 for accommodating the frame 5 and the vibration generating means 4, a motor 6 which is a rotary drive device for rotating (pivoting) the housing 3 relative to the fixed frame 2, a thrust bearing 7 for enabling the housing 3 to rotate relative to the fixed frame 2, a V-belt 11 for transmitting the rotational force of the motor 6 to the housing 3, and a coil spring 12 which is an elastic member for absorbing the impact of the up and down movement of the frame 5 by the vibration generating means 4.

[0019] The fixed frame 2 has a shape in which the base ends of four support arms 17, 17... formed in a substantially cylindrical shape are fixed to an annular thrust bearing 7, and each support arm 17, 17... protrudes in the front-rear and left-right directions from the center of the annular thrust bearing 7. The base end side of each support arm 17, 17... is arranged horizontally, and the tip side is bent in the vertical direction. A large diameter part 25 for fixing to the furnace body is provided at the tip of each support arm 17, 17.... In addition, adjacent two of each support arm 17, 17... are respectively connected to installation frames 23, 23 so as to be perpendicular to each other horizontally, and the motor 6 is attached using these installation frames 23, 23.

[0020] Meanwhile, the housing 3 has a shape in which a hollow truncated cone-shaped tapered portion 16 is connected to the lower side of a cylindrical portion 15, and accommodates the vibration generating means 4, the center portion of the frame 5, and the coil spring 12 inside. A flat columnar pulley (V pulley) 10 is fixed to the upper end of the cylindrical portion 15. A V-belt 11 is suspended between the pulley 10 and a gear 14 fixed to the tip of the rotating shaft of the motor 6 fixed to the fixed frame 2.

[0021] A top plate 27 is fixed to the upper end of the cylindrical portion 15 of the housing 3, and a rectangular flat engaging piece 22 for lifting the filling device 1 with a hoist crane or the like is provided on the top plate 27 so as to protrude upward, and an engaging hole is drilled at the upper end of the engaging piece 22 for engaging with a hook of a hoist crane or the like. Furthermore, slightly above the center of the cylindrical portion 15 of the housing 3, an upper lock nut 8 and a lower lock nut 9 are formed in a flange shape so as to protrude outward from the outer periphery of the housing 3, and the upper lock nut 8 and the lower lock nut 9 sandwich a thrust bearing 7 fixed to the fixed frame 2. In addition, three long holes 24, 24... for protruding a part of the frame 5 to the outside are drilled at equal intervals (at 120° intervals with respect to the central axis) in the outer periphery direction at the lower end of the cylindrical portion 15 of the housing 3. Meanwhile, a bottom plate 26 is fixed to the lower end of the tapered portion 16 of the housing 3.

[0022] The frame 5 has three holding arms 20, 20... protruding outward at equal intervals (120° intervals) in the radial direction from a disk body 18 located in the center. A rod-shaped tool 13, 13... is attached to the tip of each holding arm 20, 20... in a hanging manner (attached so as to be freely attached and detached). Each tool 13, 13... is a cylindrical shaft having a predetermined diameter and a fork with a sharp tip attached to the tip. In addition, support pieces 21, 21... are fixed to the lower side of the tip of each holding arm 20, 20..., and these support pieces 21, 21... support the tool 13, 13....

[0023] The frame 5 is stored below the vibration generating means 4 in the housing 3 with the base end portions of the holding arms 20, 20... protruding from long holes 24, 24... drilled near the lower end of the cylindrical portion 15 of the housing 3. The center of the disk body 18 of the frame 5 is fixed to the piston (operating shaft) 19 of the vibration generating means 4, and the coil spring 12 is interposed between the lower surface of the disk body 18 and the upper surface of the bottom plate 26 of the housing 3.

[0024] <How to use the filling device> 5 shows an example of a method of using the filling device 1 configured as described above. When an operator uses the filling device 1 to fill a gap G between a concave portion (approximately cylindrical concave portion) C of a furnace body B of an induction furnace I and a cylindrical sleeve S with a backlining material (unshaped refractory such as castable refractory) M, the operator engages a hook F fixed to the tip of a wire W of a hoist crane H with an engagement hole of an engagement piece 22 of the filling device 1, and in this state, lifts the filling device 1 with the hoist crane H. Then, the filling device 1 thus lifted is positioned above the furnace body B, and the hoist crane H is lowered to guide each tool 13, 13, of the filling device 1 into the gap G between the concave portion C of the induction furnace I and the sleeve S, and the housing 3 is placed on the upper iron plate T of the sleeve S so that the bottom plate 26 of the housing 3 abuts against the upper iron plate T of the sleeve S. In this state, the large diameter portions 25, 25·· at the tips of the support arms 17, 17·· of the fixed frame 2 are fixed to the furnace body B.

[0025] As described above, after the fixed frame 2 is fixed to the furnace body B, an external power source is supplied to the vibration generating means 4 via a lead wire (not shown) to vibrate the vibration generating means 4. When the vibration generating means 4 starts vibrating in this way, the vibration is transmitted to the disk body 18 of the frame 5 via the piston 19 of the vibration generating means 4, and the disk body 18 moves up and down as shown in Figures 6(a) and 6(b), and the three holding arms 20, 20... move up and down in the long holes 24, 24... at the lower end of the housing 3. When the holding arms 20, 20... move up and down in this way, the tools 13, 13... provided at the tip of each holding arm 20, 20... move up and down, so that the backlining material M put into the gap G between the furnace body B and the sleeve S is deaerated and pressed. Furthermore, when the vibration generating means 4 vibrates, as the disk body 18 moves downward, the coil spring 12 is gradually compressed, as shown in Figure 6 (b), thereby preventing the frame 5 from being hit downward with excessive force.

[0026] In addition, as described above, when degassing and pressing the backlining material M in the gap G between the furnace body B and the sleeve S, the motor 6 is driven to rotate (pivot) the housing 3 relative to the fixed frame 2, and the position where the backlining material M is degassed and pressed by the tools 13, 13... can be automatically changed. That is, when power is supplied to the motor 6, the rotational force of the rotating shaft of the motor 6 is transmitted to the pulley 10 at the upper part of the housing 3 via the V-belt 11, and the entire housing 3 rotates (pivots) together with the pulley 10 relative to the fixed frame 2. Then, when the housing 3 rotates in this way, the tools 13, 13... attached to the tip of each holding arm 20, 20... of the frame 5 rotate, and the position where the backlining material M is degassed and pressed is automatically changed. Therefore, it is possible to degas and press the backlining material M in the entire gap G between the furnace body B and the sleeve S uniformly and without unevenness. Then, after the back lining material M that has been filled to fill the gap G between the furnace body B and the sleeve S has been sufficiently degassed and pressed, the filling device 1 is lifted using a hoist crane H and transported to the outside of the induction furnace I and stored in a designated place.

[0027] <Effects of refractory filling equipment for furnace construction> As described above, the filling device 1 has the fixed frame 2 for fixing to the furnace body B, the frame 5 on which multiple tools 13, 13... for stirring and pressing can be attached, and the vibration generating means 4 for moving the frame 5 up and down. Therefore, during furnace construction work, the backlining material M can be degassed and pressed (i.e., filled) efficiently and easily within a short period of time without any hassle by fixing the device to the furnace body B by the fixed frame 2 and inserting the tools 13, 13... attached to the frame 5 into the gap G between the furnace body B and the sleeve S, and then moved up and down at once (synchronously and simultaneously) by the vibration generating means 4.

[0028] In addition, the filling device 1 is provided with a motor 6 which is a rotary drive device for rotating the frame 5 relative to the fixed frame 2. By using the motor 6 to rotate (pivot) the frame 5, to which the tools 13, 13, etc. are attached, relative to the fixed frame 2, the degassing and pressing position of the backlining material M can be automatically changed, so that the backlining material M in the gap G between the furnace body B and the sleeve S can be degassed and pressed (i.e., filled) extremely efficiently and very easily.

[0029] Furthermore, in the filling device 1, the frame 5 has tools 13, 13... attached hanging down to the tips of multiple holding arms 20, 20... that protrude radially from the center of the disc body 18, and the upper surface of the disc body 18 is fixed to the lower end of the piston 19 of the vibration generating means 4, so that the vibration from the vibration generating means 4 can be transmitted equally to each of the tools 13, 13... attached to each holding arm 20, 20... of the frame 5, and therefore the backlining material M can be filled evenly into the gap G between the furnace body B and the sleeve S (i.e., uniformly without causing differences in compression hardness, etc. depending on the location).

[0030] In addition, in the filling device 1, the vibration generating means 4 and the disk body 18 of the frame 5 are housed within a cylindrical housing 3, and the housing 3 is rotatable relative to the fixed frame 2, so that the frame 5 can be rotated smoothly in a horizontal plane without rattling up and down, and noise during the filling operation of the backlining material M can be reduced.

[0031] In addition, the filling device 1 has a coil spring (elastic member) 12 installed on the underside of the disc body 18 to absorb the impact of vibrations caused by the vibration generating means 4. Since the elastic member 12 absorbs the impact of excessive vibrations caused by the vibration generating means 4, the filling device 1 is less likely to be damaged and can be used for a long period of time, and furthermore, destruction of the wall surface of the furnace body B can be effectively prevented.

[0032] <Example of modification of filling device> The filling device of the present invention is not limited in any way to the above-described embodiment, and the shape, structure, and other configurations of the fixed frame, housing, vibration generating means, frame, rotational drive device, tools, etc. can be appropriately modified as necessary within the scope of the spirit of the present invention.

[0033] For example, the filling device according to the present invention is not limited to a fixed frame having four support arms as in the above embodiment, but may be modified to a fixed frame having three or five or more support arms.Furthermore, the filling device according to the present invention is not limited to a frame having three holding arms for mounting and holding tools as in the above embodiment, but may be modified to a frame having two or four or more holding arms.

[0034] Moreover, the filling device according to the present invention is not limited to a device in which the rotational force of the rotation shaft of the rotary drive device is transmitted to the housing (vibration generating means and frame) by a V-belt as in the above embodiment, but may be modified to a device in which the rotational force of the rotation shaft of the rotary drive device is transmitted to the housing (vibration generating means and frame) by a gear or other gears. Furthermore, the filling device according to the present invention is not limited to a device in which the rotary drive device is provided outside the housing as in the above embodiment, but may be a device in which the rotary drive device is stored inside the housing. In addition, the tool attached to the tip of the holding arm of the frame is not limited to a device in which a fork with a sharp tip is connected to the tip of a cylindrical shaft having a predetermined diameter as in the above embodiment, but may be a device in which a disk-shaped pressing body is provided at the tip of the shaft (orthogonal to the axis of the shaft) or a device in which a disk-shaped pressing body with a protrusion on the lower surface is provided at the tip of the shaft as in FIG. 7. Meanwhile, the filling device according to the present invention is not limited to a device in which the vibration generating means receives power from an external power source as in the above embodiment, but may be modified to a device in which the vibration generating device receives power from a battery built into the housing, or the like. [Industrial Applicability]

[0035] Since the filling device of the present invention has the excellent effects as described above, it can be suitably used as a tool for filling the gap between the concave portion of the furnace body and the cylindrical sleeve with backlining material (i.e., for degassing and pressing the backlining material) during furnace construction. [Explanation of symbols]

[0036] 1...Filling device 2. Fixed frame 3. Housing 4. Vibration generating means 5. Frame 6. Motor (rotary drive device) 13,13'...Tools I··Induction furnace B...Furnace body C.Concave part S··Sleeve G Gap M··Back lining material

Claims

1. A filling device for filling a cylindrical space with powdered unshaped refractory material during furnace construction, and degassing and pressing the material, A fixing frame for fixing to the furnace body; A frame capable of mounting a plurality of tools for stirring and / or pressing; and a vibration generating means for vertically moving the frame. A refractory filling device for furnace construction, characterized in that the vibration generating means and the disk body of the frame are contained within a cylindrical housing, and the housing is rotatable relative to the fixed frame.

2. 2. The refractory material filling device according to claim 1, further comprising a rotation drive device for rotating the frame relative to the fixed frame.

3. 3. A refractory material filling device for furnace construction as described in claim 1 or 2, characterized in that the frame has the tools attached in a hanging manner to the tips of a plurality of arms extending radially from the center of a circular plate, and the upper surface of the circular plate is fixed to the lower end of the operating shaft of the vibration generating means.

4. A refractory filling device for furnace construction as described in any one of claims 1 to 3, characterized in that an elastic member is provided on the underside of the disk body to absorb the impact of vibration generated by the vibration generating means.

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