JPH07324878A - Throw-in type immersing heater tube - Google Patents

Abstract

PURPOSE:To obtain a throw-in type immersing heater tube which is easy to move without fixing it to a furnace, can be immersed in and taken out from any place at any time when required, repeatedly used by using an insulated container, used as an additional heat source of an existing furnace and allows an existing controller to be used to control the temperature of molten metal. CONSTITUTION:A flange 2 is provided around the upper edge or upper circumference of an opening of a heat-resistant tube 1 with a built-in heating device inside. A setting-carrying device 8 with a handle 15 has a hole 17 through which the tube 1 can be inserted, a contact face with which the downside of the flange 2 comes in contact when the tube 1 is inserted in the hole 17 and a contact face which comes in contact with the upside of the peripheral part of a hole in a support plate provided on a furnace or a container when the tube 1 is inserted into the hole in the support plate. The tube 1 is inserted into the hole 17 of the setting-carrying device 8 from above and the tube 1 and the setting- carrying device 8 are fixed together.

Description

Detailed Description of the Invention

[0001]

This invention relates to aluminum, zinc, lead,
The present invention relates to a throwing type immersion heater tube for use in a non-ferrous metal such as tin or copper, a glass or the like melting furnace, a holding furnace (hereinafter simply referred to as a furnace), a crucible, or a container such as a pot for molten metal.

[0002]

2. Description of the Related Art Conventionally, a heat source is fixed in a furnace such as an immersion furnace, a reverberation furnace, an electric heating furnace, and a gas furnace. Further, in the immersion furnace, an immersion heater tube is used from the inside of the molten metal because of its good thermal efficiency. The immersion heating method of heating is adopted. In that case too, the immersion heater tube is fixed to the furnace.

[0003]

Conventionally, in various furnaces, a heat source is fixedly used in the furnace. In the furnace, problems such as difficulty in raising the temperature of the molten metal and inability to maintain a predetermined temperature often occur. In particular, when the furnace deteriorates and the heat insulation function deteriorates, or the temperature decreases in winter, the heat source equipped in the furnace may be insufficient in capacity. In this case, the temperature can be maintained if there is only a small amount of heat, but since the fixed heat source has no further capacity, a simple gas burner is installed in the suction port of the furnace or inside the furnace to generate heat directly from the molten metal surface. We are supplying. However, applying a flame directly to the surface of the molten metal increases the amount of oxides in the molten metal, absorbs hydrogen gas, makes the temperature distribution non-uniform, and greatly affects the quality of the cast product produced by the molten metal.

In the conventional furnace, a large amount of work is required to remodel the heat source, and a control device for temperature control also needs to be remodeled, resulting in an increase in the equal cost.

The present invention can be easily moved without being fixed in a furnace, and can be immersed and taken out at a necessary place, at a required time, not only in the furnace but also in other containers, and can be kept warm. Since there is no sudden temperature change if a container is used, it can be used repeatedly, therefore it can be used as an additional heat source for the existing furnace, and a simple throw-in type immersion heater tube that can also control the temperature of the molten metal with the existing control device can be used. The purpose is to provide.

[0006]

[MEANS FOR SOLVING THE PROBLEMS] A heat resistant tube is provided with means for installation and transportation. As one concrete configuration,
A surface provided with a flange on the opening edge or the outer periphery of the upper part, which has a heat-resistant tube containing a heating means and a hole into which the tube can be inserted, and which abuts the lower surface of the flange of the tube when the tube is inserted into the hole. And, when inserting the tube into the hole of the support plate provided in the furnace or the container,
It has a surface that comes into contact with the upper surface of the peripheral portion of the hole, and is composed of installation and transportation means provided with a handle, and the tube is inserted into the hole of the installation and transportation means from above to install and transport it. Support the immersion heater tube by means.

[0007]

The means for installation and transportation enables the immersion heater tube to be carried and installed in the furnace or vessel. The hole for the means for installing and carrying the immersion heater tube was inserted into the tube, and the surface of the above means that abuts the lower surface of the tube flange abuts the lower surface of the tube flange, and the above means was lifted by the handle. At times, that surface lifts the flange, thus allowing the immersion heater tube to be lifted and moved. Further, when the immersion heater tube is moved in the above state and the tube is inserted into the hole of the supporting plate provided in the furnace or the container, the surface of the above means is brought into contact with the upper surface of the peripheral portion of the hole, and the immersion heater tube is The tube is supported by the peripheral portion of the hole and the molten metal is heated from the inside by the heating means housed inside the tube. The handle can be carried by removing the immersion heater tube from a support plate provided in a furnace or the like.

[0008]

Embodiments of the present invention will be described with reference to the drawings. The tube 1 has a flange 2 on the opening edge or on the upper circumference. The tube 1 is made of a heat resistant material. The tube 1 is disclosed in JP-A-2-180755 (Japanese Patent Application No. 1-8126).
It is preferable to use the carbon-containing ceramic composite disclosed in 5). This carbon-containing ceramic composite is characterized by containing 100 parts by weight of an aggregate, 5 to 45 parts by weight of phosphorous graphite, and 10 to 40% by weight of the phosphorous graphite of boron carbide. Chemical corrosion resistance,
It excels in durability against mechanical spalling caused by rapid thermal stress, thermal conductivity, and reduction of thermal stress generated due to improvement in thermal conductivity.

A supporting plate 5 having a diameter larger than the inner diameter of the tube 1 in which a terminal 3 is provided on the upper surface and a heating element 4 connected to the terminal 3 is inserted on the lower surface is placed on the flange 2 of the tube 1 to support the plate 5. And the flange 2 are fixed. The fixing may be performed by a known method, and it is preferable to fix it in a detachable manner.

A terminal wire 6 is connected to the terminal 3, an electric wire cord 7 is connected to the terminal wire 6, and a power source is connected. An industrial power source or a household power source can be used as the power source.

The installation / transportation means 8 (hereinafter simply referred to as means 8) is constructed as follows. On the upper edge of the cylinder 9 which is larger than the diameter of the tube 1 and smaller than the tip edge diameter of the flange 2 of the tube 1, a setting flange 10 having a tip end diameter larger than that of the flange 2 of the tube 1 is provided. A cylinder 11 having a height slightly larger than the thickness obtained by stacking the flange 2 and the support plate 5 on the middle circumference is erected and
1, a horizontal step portion 12 is provided, a cylinder 13 having a diameter smaller than the diameter of the cylinder 11 is provided upright on the inner edge of the step portion 12, and a tube is formed by the upper surface of the setting flange 10 and the lower surface of the step portion 12. 1 and the edge of the support 5 are sandwiched between the flange 2
And the support plate 5 are fixed. The top of the cylinder 13 is covered so that the wire cord 7 can be connected to the terminal 3. Cylinders 11 and 13
Covers the flange 2, the support plate 5, the terminal 3, and the terminal wire 6.

A pair of handles 15 having two legs 14 are erected on the setting flange 10 so as to face each other.

When the immersion heater tube of the above embodiment is used, the immersion heater tube is lifted by the handle 15 and a refractory material such as metal or heat-resistant brick, which is provided on the opening of the furnace or the container, has a temperature of 800 ° C. or higher. The tube 1 and the cylinder 9 are inserted into the hole 17 of the support plate 16 made of a refractory material capable of withstanding the diameter larger than the diameter of the cylinder 9 and smaller than the diameter of the setting flange 10 to support the setting flange 10 on the supporting plate. The immersion heater tube is supported by the support plate 16 by placing it on the edge of the hole 17 of 16 and the majority or the tip of the tube 1 is immersed in the molten metal M in the furnace or the container, and the wire cord is used as a power source. Connecting. The heating element 4 is energized to heat the molten metal M around the tube 1 from the inside.

For controlling the temperature of the molten metal, an existing control device for a furnace or the like can be used, but if necessary, a temperature may be controlled by interposing a transformer between the electric wire cord 7 and the power source.

When the heating by the immersion heater tube is no longer necessary, the electric wire cord 7 is disconnected from the power source and the handle 15
Then, the immersion heater tube is lifted, the cylinder 9 and the tube 1 are pulled out from the hole 17 of the support plate 16, and the immersion heater tube is moved to a desired place and stored. For storage, it is preferable to prevent a sharp temperature drop by using a heat insulation container. As the heat retaining container, it is preferable to use the heat retaining / combining moving device described later.

FIG. 3 shows a cross section of an immersion heater tube for gas fuel such as city gas and LPG. The tube 18 contains an inner tube 19, and the inner tube 19 contains a burner 20.
The inner tube 19 is at the upper end above the tube 18 and
An air intake port 21 provided above a flange 23 described later.
And a lower end of the burner 20 opens downward in the tube 18, and the burner 20 has a joint 22 for a pipe for gas fuel provided outside the upper part of the tube 18 at its upper end and above a flange 23 described later. And the burner top 20a is located inside the inner tube 19. Tube 1
A flange 23 is provided on the outer surface of the upper part of the plate 8. An exhaust hole 24 is provided on the flange 23 on the outer surface of the upper portion of the tube 18.

Installation / transportation means 25 (hereinafter simply referred to as means 25)
Means that a setting flange 27 is provided on the upper edge of a cylinder 26 having a diameter slightly larger than the diameter of the tube 18 and smaller than the tip diameter of the flange 23, and the flange 27 has a diameter of 2 mm.
A pair of handles 29 having book legs 28 are provided for each leg 2
The lower part of 8 is fixed to the setting flange 27 by welding or screwing with a nut.

When using this immersion heater tube, insert the tube 18 into the cylinder 26 of the means 25,
When the means 25 is lifted by the handle 29 of the means 25, the means 2
The upper surface of the setting flange 27 of the cylinder 26 of 5 contacts the lower surface of the flange 23 of the tube 18, and the entire immersion heater tube is lifted. Therefore, when the tube 18 and the cylinder 26 are inserted into the hole 17 of the support plate 16 provided on the opening of the furnace or the container and lowered, the lower surface of the setting flange 27 comes into contact with the edge of the hole 17 of the support plate 16. Supported by the molten metal M in the furnace or the container.
Is immersed in.

When a gas pipe is connected to the joint 22 and ignited by the ignition device 41, the gas is burner top 2
At the opening 0a, the air inside the tube 18 is mixed and burned with the fresh air sucked through the air suction port 21, the temperature inside the tube 18 rises, and the molten metal M on the outer circumference of the tube 18 is heated. Exhaust gas is discharged from the exhaust hole 24.

When the heating of the molten metal is stopped, the combustion of the burner 20 is stopped, the gas pipe is removed from the joint 22, the immersion heater tube is lifted by means of the handle 29 via the means 25, and the cylinder 26 and the tube from the hole 17 of the support plate 16 are removed. Remove 18 and transport immersion heater tube to desired location for storage. For storage, it is preferable to prevent a sharp temperature drop by using a heat insulation container. As the heat retaining container, it is preferable to use a heat retaining / combining moving device described later.

The tube 18 of the immersion heater tube is
Any durable refractory material can be used.
For example, silicon nitride-bonded silicon carbide, silicon oxynitride-bonded silicon carbide, aluminate titanate, silicon nitride, silicon carbide, sialon, etc., which have been conventionally used, are disclosed in the above-mentioned JP-A-2-180755. As the carbon-containing ceramics composite thus obtained, graphite silicon carbide, graphite alumina, or the like can be used.

FIG. 4 shows another embodiment of the immersion heater tube according to the present invention installed on a support plate 16 provided in a furnace or the like. The installation / transportation means 38 (hereinafter simply referred to as means 38) has a handle 15 having two legs 14 oppositely provided on a support plate 39 having a hole 40 into which the tube 1 of the immersion heater tube can be inserted. The support plate 39 is provided with a locking tool such as a clamp 42 for fixing the support plate 5 and the flange 2 of the tube 1.

The tube 1 is inserted into the hole 40 of the support plate 39 of the means 38, and the upper surface of the peripheral edge portion of the hole 40 of the support plate 39 is brought into contact with the lower surface of the flange 2 of the tube 1 so that the support plate 5 and the tube 1 are separated from each other. Removably fixed to the flange 2 and the handle 15
Then, the immersion heater tube is lifted and moved, and the tube 1 is inserted into the hole 17 of the support plate 16 provided in the furnace, etc.
When the supporting plate 39 of No. 8 is placed on the peripheral portion of the hole 17 of the supporting plate 16, the supporting plate 16 supports the immersion heater tube.

Although the electrothermal submersion heater tube has been described with reference to FIG. 4, the means 38 is the hole 40 of the support plate 39.
Tube 18 of the immersion heater tube for gas fuel
If the diameter is set so that the tube can be inserted and the flange 23 of the tube 18 is supported by the support plate 39, it can be used as a means for installing and transporting the immersion heater tube for gas fuel.

The planar shape of the support plate 39 may be either circular or polygonal.

FIG. 5 is a partial cross-sectional view of a transfer device 30 that also serves as a heat insulator and is equipped with a throw-in type immersion heater tube. The base 31 is a plane triangle, and a vehicle 32 is provided below the three corners, and a column 33 is provided upright above the three corners.

A heat resistant support plate 34 having a hole 35 into which the cylinder 9 of the means 8 of the immersion heater tube can be inserted is fixed and supported on the upper ends of the three columns 33. The back surface of the support plate 34 penetrates through the hole 35 in a concentric circle with the three columns 3.
A heat-resistant cylindrical body 36 having a diameter that can be inserted between the upper ends of 3 is fixed.

On the outer periphery of the cylindrical body 36, an opening edge portion of a heat insulating flexible bag 37 for keeping the temperature of the immersion heater tube is attached. Instead of the bag 37, a solid container made of a heat insulating material is used, and the opening edge of the container is provided with a cylindrical body 36 or a direct support plate 34.
It may be locked to the lower surface of the device using a locking tool. In addition, it is preferable to provide a heating element for keeping heat in this container, because the immersion heater tube can be quickly reused. Also,
This container may be formed directly from a heat insulating material, or a container made of a heat resistant material such as metal having an inner surface covered with a heat insulating material may be used.

The support plate 34 is preferably provided with a hanger 43 for the electric wire cord of the immersion heater tube.
Further, it is preferable to provide a clamp on the support plate 34 to fix the immersion heater tube.

When this moving device is used, the immersion heater tube is lifted by the handle 15 of the means 8, the tube 1 and the cylinder 9 are inserted into the hole 35 of the support plate 34 from above, and the lower surface of the flange 2 is supported by the support plate 34. When contacted with the upper surface of the peripheral edge of the hole 35, the immersion heater tube moves to the moving device 3
Supported by 0. At this time, the tube 1 is housed in the bag 37 and kept warm.

In the above state, the moving device is moved to the vicinity of the furnace or the container, the immersion heater tube is lifted by the handle 15, the tube 1 and the cylinder 9 are pulled out from the hole 35, and the supporting plate provided in the furnace or the container is used. The tube 1 is supported and used by immersing the tube 1 in the molten metal M. After use, reverse the above procedure and transfer the immersion heater tube to the transfer device again. At this time, the bag 37 prevents the temperature of the tube 1 from dropping sharply and improves the rising of the tube 1 when it is reused.

Although the moving device has been described for the electrothermal type immersion heater tube, the hole 35 of the support plate 34 has a diameter such that the tube 18 of the immersion heater tube for gas fuel and the cylinder 26 of the means 25 can be inserted. For example, it can be used as a transfer device for immersion heater tubes for gas fuel.

The planar shapes of the base 31 and the support plate 34 are
It may be circular, square, triangular or any other polygonal shape. The number of columns 33 is not limited to three, and more columns may be provided. The tubular body 36 on the lower surface of the support plate 34 may be omitted, and the opening edge portion of the bag 37 may be directly attached to the lower surface of the peripheral edge portion of the hole 35 of the support plate 34 by the locking means. The column 33 or the support plate 34 may be provided with a handle for pushing the moving device.

[0034]

[Effect] The throw-in type immersion heater tube according to the present invention can be easily moved and can be used as an additional heat source in a furnace or a container without deteriorating the quality of the melt, thereby controlling the temperature of the melt in the furnace or the container. make it easier.
Immersion in the residual melt of the container allows the residual melt to be used immediately. Also, in furnaces and vessels,
It can also be used to dissolve the material to be melted by stacking the material to be melted around the tube of the immersion heater tube supported by a support plate and heating the tube. By using the immersion heater tube according to the present invention, it is possible to heat up without modifying the furnace.

The immersion heater tube according to the present invention is
If it is stored in a heat insulation container, the temperature of the tube is prevented from dropping sharply, the heat spalling property of the immersion heater tube is mitigated, and the temperature rise in reuse is accelerated.

[Brief description of drawings]

FIG. 1 is a sectional view of a state in which an electrothermal immersion heater tube according to the present invention is installed.

FIG. 2 is a perspective view of an electrothermal immersion heater tube according to the present invention.

FIG. 3 is a sectional view of a gas fuel type immersion heater tube according to the present invention.

FIG. 4 is a cross-sectional view of essential parts in a state in which an electrothermal immersion heater tube according to the present invention is installed.

FIG. 5 is a perspective view in which a part of the immersion heater tube moving device according to the present invention is shown in section.

[Explanation of symbols]

 M Molten metal 1 Tube 2 Flange 3 Terminal 4 Heating element 5 Support plate 6 Terminal wire 7 Electric wire code 8 Means for installation and transportation 9 Cylinder 10 Set flange 11 Cylinder 12 Step 13 Cylinder 14 Leg 15 Handle 16 Support plate 17 Hole 18 Tube 19 Inner pipe 20 Burner 20a Burner top 21 Air intake port 22 Joint 23 Flange 24 Exhaust hole 25 Means for installation and transportation 26 Cylindrical 27 Set flange 28 Leg 29 Handle 30 Moving device 31 Base 32 Car 33 Strut 34 Support plate 35 hole 36 Cylinder 37 Bag 38 Installation / Transportation Means 39 Support Plate 40 Hole 41 Ignition Device 42 Clamp 43 Hanger

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadao Sasaki 6-10 Suenari-cho, Takarazuka-shi, Hyogo (72) Inventor Nishihira Kagura 24-501 Kawanakashin-cho, Daito-shi, Osaka Nishihira Akira (72) Inventor Yuji Morishige 3-13-17 Inada Shinmachi, Higashiosaka City, Osaka Prefecture

Claims (2)

[Claims] 1. A throw-in type immersion heater tube in which a heat-resistant tube is provided with means for installation and transportation. 2. A heat-resistant tube provided with a flange at an opening edge or an outer periphery of an upper part thereof and having a built-in heat generating means, and a hole into which the tube can be inserted, the flange of the tube being inserted into the hole. Installation with a handle that has a surface that contacts the lower surface and that has a surface that contacts the upper surface of the peripheral portion of the hole when the tube is inserted into the hole of the support plate provided in the furnace or container An immersion heater tube of a throwing type, which is formed by inserting the tube into the hole of the installation and transportation means from above.