JPH034835B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to the structure of a heating furnace that includes a heated body passage on its central axis.

[Prior Art and Problems] The inside of a casing for a heating furnace is used at a high temperature due to the heating element, so the casing becomes very hot. Therefore, in order to prevent deterioration of the casing and to ensure safety, the casing must have a structure that allows cooling water to circulate.

FIG. 4 illustrates a conventional heating furnace of this kind, and this example will first be explained.

As described later, the casing has a water-cooled structure. An upper insulating material 5 made of carbon and a lower insulating material 6 made of the same material are arranged inside this casing, and an annular carbon heater 4 is arranged inside the casing. is formed.

The casing that encloses the heating element part by the heat insulating materials 5 and 6 consists of a casing lower lid 1, a casing main body 3, and a casing upper lid 2, and the casing lower lid 1 has an internal hollow annular body formed by outer plates 1' and 1''. The casing body 3 is formed as a hollow annular body with outer plates 3' and 3'', and is partitioned in the middle. It is partitioned into two spaces above and below by a plate 15, and a cooling water supply port A and a drain port B are provided respectively. Further, the casing upper lid 2 is constructed as a hollow annular body by outer plates 2' and 2'', and has a cooling water supply port A and a drain port B provided at symmetrical positions.

These casing lower lid 1, casing body 2,
The casing upper lid 3 encloses the heating element portion and is successively integrated by welding J, and the portions of the casing lower lid 1 and the upper lid 3 that serve as passages for the heated body 7 are provided with the purpose of preventing heat dissipation from inside. Perforated presser plate 1
3 is installed.

By the way, if a casing having the above-mentioned structure is manufactured, it is possible to maintain sufficient airtightness between the inside and outside, but the manufacturing cost (material and processing cost) becomes extremely high.

If impurities or the like get into the waterway of the casing, there is a risk of water puddles forming. This makes maintenance within the waterway extremely difficult and requires a lot of cost and time.

[Object of the present invention. Configuration] The present invention provides a heating furnace in which the main body, upper cover, and lower cover of a heating furnace casing are made of square pipes, and the cost is low, maintenance is streamlined, and sufficient airtightness can be maintained between the inside and outside. The idea is to use square pipes, form each square pipe into an annular shape, form a casing by concentrically and overlapping each other, and store the heating element part in this. It is a heating furnace.

Embodiments will be explained below with reference to the embodiments shown in FIG. 1, FIGS. 2A and 2B, and 3A and 3B.

FIG. 1 shows an overall view, FIGS. 2A and 2B are a top view and a sectional view of the upper casing and the lower cover, and FIGS. 3A and 3B are a top view and a sectional view of the casing body.

As shown in FIG. 2, in the present invention, a square pipe 8 is used in a portion having a waterway structure. The material of the square pipe is stainless steel. As mentioned above, this figure shows the upper and lower lids of the casing. A hollow annular body c, which is the innermost part of the square pipe 8, a hollow annular body b, which is in contact with the outside through a packing 9 made of rubber, and a hollow annular body a, which is in contact with the outside through a packing 9, are formed by molding. make.

Both end surfaces of each of the annular bodies a, b, and c are sealed by welding with a partition plate, and face each other with a slight gap left, and the hollow annular bodies a, b, and
Cooling water supply port A and drain port B are located on the outside of c.
They are arranged alternately at c.

Hollow annular bodies a, b, and c are arranged with packings 9 and the portions that form the gaps a, b, and c are arranged in a straight line, and elastic inclusions 14 are provided between the gaps. An annular fixing fitting 12 is fitted around the outer periphery of the annular body a, and the flange portion thereof is tightened with bolts and nuts. Then, each cooling water supply port A and drain port B on the hollow annular bodies a, b, and c are connected with a cooling water hose 11 and a detachable cooling water joint 10.

By tightening the fixing fittings 12, the diameters of the hollow annular bodies a, b, and c are slightly reduced, and the intervening packing 9 maintains airtightness from each other.
The cooling water passage goes around c from the innermost annular body c,
Enters the annular body b, takes a passage in the opposite direction to c,
Further, it enters the annular body a, takes a passage in the opposite direction to b, and reaches the discharge port B after going around it.

Note that by using gaskets to maintain airtightness on the elastic inclusions 14 interposed between both end faces of each of the annular bodies a, b, and c, both end faces of each of the annular bodies a, b, and c are made open. Of course, it is also possible to seal it by tightening the fixing fittings 12.

FIG. 3 shows the casing body, and a hollow annular body d is formed by the same square pipes 8 as the upper and lower lids. The molded end of the hollow annular body d is welded with a partition plate inserted therein, and a cooling water supply port A and a drainage port B are provided in the annular body d in the vicinity of this partition plate, sandwiching this partition plate, and A mounting plate 16, through which bolts are passed through at predetermined positions, is welded to the outer periphery of the annular body d.

The packing 9 is arranged between a plurality of hollow annular bodies d of the same diameter, the partition plates are aligned and overlapped, and the mounting plate 16
Pass a bolt through and tighten with a nut, and connect the supply port A and drain port B of each stage via the cooling water hose 11 and the removable cooling water joint 10 so that there are two flow paths above and below the center. Connecting. Each stage hollow annular body d
The cooling water flow paths in each stage are generally connected in opposite directions to the upper and lower stages. This constitutes the casing body. The reason why the flow path is divided into upper and lower flow paths in the center is to cope with the fact that the furnace temperature particularly rises in this area.

As shown in Fig. 1, a heating element including a carbon heater 4, an upper insulating material 5, and a lower insulating material 6 is arranged on the lower lid, the casing body is arranged, the upper lid is placed on it, and a presser foot made of aluminum is placed. The furnace of the present invention is assembled by attaching the plate 13 and tightening the entire assembly.

[Operation/Effect] As explained above, the present invention is manufactured using the same square pipe, so the manufacturing cost (material cost,
(processing cost) is significantly lower than that of conventional heating furnace casings.

And since the seal is sandwiched between the square pipes, it can be used without any problems with airtightness.

Even if impurities get into the square pipe, maintenance can be easily performed by removing the cooling water hose joint and loosening the fastening bolt of the fixing fitting.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the invention. 2A and 2B are a top view and a sectional view of the upper casing and lower cover of the embodiment shown in FIG. 1. 3A and 3B are a top view and a partially sectional view of the casing body of the embodiment shown in FIG. 1.
FIG. 4 shows a conventional heating furnace. 1...Casing lower cover, 2...Casing upper cover, 3...Casing body, 4...Carbon heater, 5...Upper insulation material, 6...Lower insulation material, 7
... Heated object, 8 ... Square pipe, 9 ... Airtight packing, 10 ... Cooling water joint, 11 ... Cooling water hose, 12 ... Fixing fittings, 13 ... Holding plate,
14...Elastic inclusion, 16...Mounting plate.

Claims (1)

[Claims] 1. A plurality of hollow annular bodies made of square pipes each having a cooling water supply port and a drain port are arranged and fixed concentrically with gaskets in between, and the drain ports and supply ports of adjacent hollow annular bodies are connected to each other. The upper and lower casing lids are connected with rubber hoses via removable cooling water joints, and the hollow annular body of the same diameter, which is made of square pipe and has cooling water supply and drainage ports, is placed between the gaskets. The heat-generating part is housed in a casing with a casing main body that is stacked and fixed, and the drain and supply ports of adjacent hollow annular bodies are connected with a rubber hose via a removable cooling water joint. A heating furnace featuring