JPH0321812Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is based on pressurizing the molten metal in a heat insulating furnace to the outside of the heat insulating furnace, or transferring a solid with a constant volume into the heat insulating furnace. This invention relates to a hot water supply pipe used in a hot water supply furnace that supplies hot water by volume replacement with molten metal by inserting objects.

[Prior art and its problems] Conventionally, a predetermined amount of molten metal in an insulating furnace that holds molten metal is transferred to the outside of the insulating furnace by pressurizing the insulating furnace or by inserting a solid material having a certain volume into the insulating furnace. Various shapes of hot water pipes are known for use in hot water furnaces that supply hot water.

Among these, the hot water supply pipe shown in FIG. 5 is used in a hot water supply furnace of the type shown in FIG. 4 which pressurizes the inside of the heat retention furnace.

In Fig. 5, the tip of the ceramic tube 2 is constricted to ensure the accuracy of each hot water supply in the case of a hot water supply furnace that pressurizes the inside of the heat retention furnace, and in the case of volume replacement. does not require aperture.

However, in the case of a hot water supply pipe as shown in FIG. 5, in the state where the hot water supply pipe 12 is set in the ceramic tube 2 shown in FIG. A small amount of oxide and metal thin film is generated on the part of the metal holder consisting of the part 1 and the gutter-like molten metal outflow part 19 that is in contact with the gutter 11, and grows little by little each time the melt is supplied. The drawback is that unless the grown oxide and metal thin film are removed in a constant cycle, it will eventually become impossible to supply hot water at all.

It is known that one method to overcome this drawback is to extensively heat the area around the hot water pipes, but this has another drawback in that several kilowatts of electricity and other large amounts of heat sources are used just for this purpose. This is inconvenient in terms of energy balance.

[Purpose of the invention] This invention was made in view of the above circumstances.
A hot water pipe that is inexpensive, simple, reliable, can minimize energy loss, suppresses the generation and growth of oxide and metal thin films, and extends the cycle for removing grown oxide thin films. The purpose is to provide.

[Means for Solving the Problems] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1) FIG. 1a is a sectional view of an embodiment related to the claims of the present invention.

Moreover, FIG. 1b is a plan view.

The ceramic tube 2 is fixed to a metal holder consisting of a hollow inverted truncated round main part 1 and a trough-like molten metal outflow part 19 by an undefined refractory 3. A heater 7 for supplying heat for heating the ceramic tube 2 via an amorphous refractory 3 is embedded inside and connected to a heater lead wire 6. A heater lead wire 6 for supplying electricity to the heater 7 is connected from a power source (not shown) via a power regulator (also not shown).

Here, as long as the heater 7 has a sheathed type structure that does not cause electrical problems such as leakage and shorts, the material and heat generation principle of the heater itself do not matter.

The hot water supply pipe with a built-in heater in this embodiment is attached to a predetermined position of the heat retention furnace 10 via a heat-resistant gasket 4, similar to the hot water supply pipe 12 shown in FIG.

The molten metal 13 pushed up from the heat insulating furnace 10 by pressurization or volume displacement in the heat insulating furnace rises inside the ceramic tube 2 and is supplied to the outside. After the constant supply, the pressure or volume displacement is released and the ceramic It descends inside the manufactured tube 2.

At this time, since the ceramic tube 2 is heated to near the melting point of the molten metal 13 by the heat supplied from the heater 7, the generation and growth of oxides and metal thin films are extremely reduced.

(2) FIG. 2a is a sectional view of an embodiment related to the claims of the present invention, and FIG. 2b is a plan view.

The edge structure ceramic tube 21 has a main part 1 having a hollow inverted truncated round shape and a trough-like molten metal outflow part 1.
It is fixed to a metal holder composed of 9 and 9 with an undefined refractory 3.

The fourth tube 21 made of edge structure ceramics
When attached to a predetermined position of the heat-retaining furnace 10 in the figure through the heat-resistant gasket 4, the tip which is on the outside of the heat-retaining furnace 10 has an acute edge structure.

The molten metal 13 pushed up from the heat insulating furnace 10 by pressurization or volume displacement in the heat insulating furnace rises inside the ceramic tube 2 and is supplied to the outside. After the constant supply, the pressure or volume displacement is released and the ceramic It descends inside the manufactured tube 2.

At this time, the edge portion of the edge structure ceramic tube 21 is attached to the heat insulating furnace 10 as shown in FIG. 2c.
The molten metal supplied to the outside is separated from the edge-structured ceramic tube 21 very quickly, and is also quickly cut and separated by utilizing the shrinkage force accompanying the solidification of the oxide and metal thin film that is generated. The molten metal, oxides, and metal thin film products must be removed in the edge structure ceramic tube 21 by promoting the flow out of the heat preservation furnace 10 and return into the heat preservation furnace 10 through the edge structure ceramic tube 21. The removal cycle can be extended by suppressing the growth of undesired oxide and metal film products.

(3) FIG. 3a is a sectional view of an embodiment related to the claims of the present invention, and FIG. 3b is a plan view.

The ceramic tube 2 is fixed to a metal holder consisting of a hollow inverted truncated round main part 1 and a trough-like molten metal outflow part 19 by an undefined refractory 3. A heater 7 for supplying heat for heating the ceramic tube 2 via an amorphous refractory 3 is embedded inside and connected to a heater lead wire 6. A heater lead wire 6 for supplying electricity to the heater 7 is connected from a power source (not shown) via a power regulator (also not shown). A ceramic heat insulating material 5 is attached to cover the monolithic refractory 3 and the heater 7 to prevent heat dissipation from the upper outer surface of the monolithic refractory 3.

Here, as long as the heater 7 has a sheathed type structure that does not cause electrical problems such as leakage and shorts, the material and heat generation principle of the heater itself do not matter.

The hot water pipe with a built-in heat retention enhanced heater in this embodiment has a heat-resistant gasket 4 similar to the hot water pipe 12 in FIG.
It is attached to a predetermined position of the heat retention furnace 10 via.

The molten metal 13 pushed up from the heat insulating furnace 10 by pressurization or volume displacement in the heat insulating furnace rises inside the ceramic tube 2 and is supplied to the outside. After the constant supply, the pressure or volume displacement is released and the ceramic It descends inside the manufactured tube 2.

At this time, the ceramic tube 2 is heated to near the melting point of the molten metal 13 by the heat supplied from the heater 7, and the heat dissipation through the upper surface of the monolithic refractory 3 is caused by the ceramic heat insulating material 5. Since this is prevented, the generation and growth of oxides and metal thin films are less than in the case of the claims, although it requires extra manufacturing effort.

In the above embodiment, the ceramic tube 2
Or edge structure ceramic tube 21
The reason why the tip is constricted is to ensure the accuracy of each hot water supply in the case of a hot water supply furnace that pressurizes the inside of the heat retention furnace 10, and the constriction is not necessary in the case of volume replacement. .

[Effects of the invention] As explained above, the invention is inexpensive, simple, reliable, and can minimize energy balance loss, suppressing the generation and growth of oxide and metal thin films. , by pressurizing the inside of the insulating furnace to move the molten metal in the insulating furnace out of the insulating furnace, which can extend the cycle of removing the grown oxide thin film, or by inserting a solid material with a certain volume into the insulating furnace. Therefore, users who use hot water furnaces should select hot water pipes for hot water heating furnaces that supply hot water by volume replacement with molten metal, while comparing the effect of extending the cycle of removing the thin oxide film that has grown and the purchase cost of the hot water pipes. It became even possible to do so.

[Brief explanation of the drawing]

FIG. 1a is a cross-sectional view of an embodiment related to the claims of the present invention, and FIG. 1b is a plan view. Figure 2a
2 is a sectional view of an embodiment related to the claims of the present invention, FIG. 2b is a plan view, and FIG. 2c is a correlation diagram when the molten metal flows out. FIG. 3a is a cross-sectional view of an embodiment related to the claims of the present invention, and FIG. 3b
is a plan view. FIG. 4 is a sectional view showing the structure of a hot water supply furnace that supplies molten metal to the outside of the furnace by pressurizing the inside of the heat retention furnace. FIG. 5 is a sectional view showing the structure of a conventional hot water supply pipe attached to the hot water supply furnace shown in FIG. 1... The main part of the hollow inverted truncated round shape, 2...
Ceramics tube, 21... Edge structure ceramics tube, 3... Monolithic refractory, 4
...Heat-resistant gasket, 5...Ceramics heat insulating material, 6...Heater lead wire, 7...Heater,
10... Heat retention furnace, 11... Gutter, 12... Hot water pipe,
13... Molten metal, 14... In-furnace pressure tube, 15... In-furnace pressure detection conduit, 16... In-furnace pressure discharge pipe, 17
... Refractory material, 18 ... Heat-retaining furnace cover, 19 ... Gutter-shaped molten metal outflow section. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] A ceramic tube is arranged in the hollow core position of a metal holder consisting of a hollow inverted truncated circular main part and a trough-like molten metal outflow part. In order to fix the ceramic tube in the holder at the above arrangement position, an amorphous refractory is solidified between the metal holder and the ceramic tube, and the metal in the solidified amorphous refractory is solidified. Starting from the center line of the trough-like molten metal outflow part between the main part of the hollow inverted truncated conical shape of the hollow inverted truncated conical holder and the ceramic tube. A hot water pipe with a built-in heater, characterized in that it is composed of a built-in heater at an angle of 60 degrees and a heater lead wire for supplying electricity to the heater. An edge structure ceramic tube is placed in the hollow center of a metal holder consisting of a hollow inverted truncated circular main part and a trough-like molten metal outflow part, and the edge structure ceramic tube is placed in the metal holder. An edge structure molten metal pipe characterized in that an amorphous refractory is solidified between the metal holder and the ceramic tube to fix the ceramic tube in the position. A ceramic tube is arranged at the hollow center of a metal holder, which is composed of a hollow inverted truncated circular main part and a trough-like molten metal outflow part, and the ceramic tube is placed in the metal holder at the center of the metal holder. solidifying an amorphous refractory between said metal holder and said ceramic tube to fix in position a hollow inverted truncated portion of said metal holder within said solidified amorphous refractory; Built-in at an angular position of 60° from the center line of the trough-like molten metal outflow part at a mid-distance between the main part of the concave shape and the ceramic tube with the hollow center of the hollow inverted truncated conical shape as a starting point. a heater lead wire for supplying electricity to the heater, and a heater lead wire arranged on the upper part of the monolithic refractory to prevent the heat from the built-in heater from dissipating from the surface of the monolithic refractory. A water supply pipe with a built-in heater that strengthens heat retention and is characterized by being composed of a ceramic heat insulating material.