JPS6048673B2 - Flange with fluid passage and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to flanges used for joints of valves, ducts, etc., furnace body division parts of melting furnaces and waste shaft furnaces, joints of reaction towers and heat exchangers, etc. In particular, it is an object of the present invention to provide a flange having a fluid passage according to a novel manufacturing method.

Conventionally, a combustion furnace, for example, a shaft furnace for waste, has a truncated conical hearth at the bottom of a vertically cylindrical furnace body 1 lined with a refractory T, as shown in Fig. 1a. In the hearth part of the shaft furnace 3 formed by integrally connecting the parts 2, four support frames 4, ..., 4, and a tuyere 5 for blowing oxygen,
Melt discharge port 6 and 13i, 10'■tc place J-゛
4-18J old ■ ['tBiI-11, consideration 1 li is dried in an increasingly high-temperature atmosphere until it is dropped onto the hearth side, and then thermally decomposed in an oxygen-deficient atmosphere. Furthermore, it has been proposed that the molten metal is collided with and separated by support frames 4, . By the way, many of the flanges F used in the above-mentioned furnace body wounds are not provided with cooling fluid passages, and therefore airtightness cannot be maintained due to thermal deformation due to high temperatures, resulting in harmful This allowed gas to leak, creating problems in terms of environmental protection and safety.

For this reason, as in the flange 7 disclosed in Utility Model Application No. 53-102906 (design name: "Cooling Companion Flange for Hot Air Valve") shown in FIG. A method has been proposed in which cooling fluid passages 10, 10 are formed by closing the groove 8 with partition walls 9, 9, but leakage of cooling fluid from welded parts 9a, 9a of partition walls 9, This is completely unavoidable, and especially when a large load is applied to the flange 7, there are problems with strength and an increase in wall thickness. The present invention has been made in view of the above-mentioned problems of the conventional art, and involves welding one or more segments having holes for fluid passage through the wall in the circumferential direction so that the hole openings coincide with each other. The present invention provides a flange having an annular flange, which eliminates the need to form the fluid passage itself by welding, and which has a fluid passage that can maintain sufficient strength.

Another invention according to the present invention provides the most preferable method for manufacturing the flange, in which a long metal plate is provided, and the wall portion of the metal plate is provided with the following:
After penetrating a straight hole for a fluid passage, it is bent to a predetermined curvature to form a segment, and one or more of the segments are welded so that the hole openings coincide with each other to form an annular pipe. It is designed to constitute a flange.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings, in particular embodiments that are most suitable for combustion furnaces that require cooling.

The structure of the combustion furnace is the same as that shown in FIG. 1a, so its explanation will be omitted.

FIG. 2 shows a flange 10 formed by dividing the circumference into three parts (120 degree pitch).

The flange 10 includes a flange 1 as shown in FIG. 3a.
A metal plate 13' is provided as a segment material of 0, and a straight hole 11 for a fluid passage is drilled through the wall of the metal plate 13' over the entire length in the longitudinal direction, and a joint is formed at the hole opening. Piece (described later) Counterbore 12 for fitting
, 12, as shown in FIG. 3b, the flange 10 is bent into an arc shape by hot or cold bending.
A segment 13 having a circumferential length of 113 is constructed.

Then, the three segments 13 are arranged in a circular shape, and the cylindrical joint pieces 14, 14 are fitted into the two opposing counterbores 12, 12, and the joint piece 15 is fitted into the remaining one place. each segment 13,
..., 13 are welded together to form an annular flange 10. In this way, the joint pieces 14, 14, 15 are attached to the wall of the flange 10.
An annular fluid passage 16 (see FIG. 4) is completed, which is connected only at this portion.

As shown in FIGS. 5 and 6, external fluid supply and drainage ports 17 and 18 are provided on both sides of the joint piece 15, respectively, to reach the fluid passage 16 from the outside of the flange 10.

In this way, in the process in which the cooling water supplied from the water supply port 17 passes through the fluid passage 16 and is discharged from the drain port 18, the entire flange 10 is uniformly cooled, and if the flange 10 is for a combustion furnace, thermal deformation It can be used safely for a long period of time without causing any side effects. The flange 10 has mounting holes 19, . . . , 19 for attaching the mating flange.
At the same time, the end of the flange 10 on the back side of the flange is welded to the furnace body 20 of the combustion furnace. Above flange 1
The number of fluid passages 16 at No. 0 does not necessarily have to be one;
You may provide two as shown in Figure a, or three as shown in Figure 7b.
You may also provide a book. In particular, if the flange 10 is of a combustion furnace, the cooling effect will be further improved. Further, the external fluid supply/discharge ports 17 and 18 do not need to be particularly provided on the outer side of the flange 10, and may be provided at the corners of the back surface of the flange as shown in FIG. As shown in Fig. 8b, the wall may be made thicker to ensure the threading length.

Further, the external fluid supply/discharge ports 17 and 18 are located at one of the flange 10.
There is no need to remove the joint pieces 15, . . . from each segment 13, . . . , as shown in FIG.
..., connect with 15, each joint piece 15
, . . . , 15 may be provided with external fluid supply/discharge ports 17 and 18, respectively.

In this case, independent fluid passages 16, . . . , 16 are formed for each segment 13, . Also in this case, if the flange 10 is of a combustion furnace, the cooling effect will be further improved. In the above embodiment, the flange 10 is composed of three segments 13, . . . , 13, but as shown in FIG. You can also do it. In this case, the joint portion 21a is the place to be. Further, the joint portion 13a of the flange 10, the cooling flow path 16, and the water supply/drainage ports 17, 18 may be combined as shown in FIG.

This is an implementation in which the fluid passage holes 11 formed in the flange segment material are not penetrated as shown in the example in Fig. 3, and the fluid passage holes 11, 11 machined from both end faces of the metal plate 13'' are kept at a depth that does not communicate with each other. This is an example, and in this case, each segment joint portion 13a has a cylindrical joint piece 14,...
,14. to communicate the fluid passage holes with the water supply and drainage ports 17 and 18.
This is an example in which they are arranged not on both sides of the joint portion 13a.

Therefore, by combining the embodiments shown in FIGS. 2, 9 and 14, the installation positions and number of the water supply and drainage ports 17 and 18 can be determined according to the required flanges. 11 and 12 show another embodiment of the external fluid supply/discharge ports 17, 18, with small holes on both sides of the flange segment joint 13a reaching the fluid passages 16, . . . , 16 from the flange back surface. Hole 22,...,2
2, and has small holes 23, ..., 23 that match the small holes 22, ..., 22, and communicates with the small holes 23, ..., 23 from the outside side of the flange. A metal member 24 is provided which also serves as a welding backing metal member for the joint portion 13a in which external fluid supply/discharge ports 17 and 18 are bored, and the corresponding metal member 24 is welded and fixed to the back surface of the flange 10.

In this way, the joint portion 13a of the flange 10 will be reinforced. Therefore, the flange 10 is of a combustion furnace,
Even when a large load is applied, a fluid passage with a large cross-sectional area can be secured. Although each of the above embodiments is directed to a circular flange 10, it goes without saying that the flange 10 can also be easily applied to a circular or oval shape.

As is clear from the above description, in the present invention, an annular flange is constructed by welding segments penetrated by holes in a fluid passage, so the fluid passage itself is formed by welding as in the conventional art. This eliminates the need for cooling fluid, completely avoids leakage of cooling fluid, and maintains sufficient strength as a flange with a thin wall thickness. Further, in the method for manufacturing a flange according to the present invention, after a straight hole for a fluid passage is penetrated through a metal plate material, segments are formed by bending the material, and one or more segments are welded to form an annular flange. Therefore, an arcuate fluid passage can be easily formed.

[Brief explanation of the drawing]

Fig. 1a is a longitudinal sectional view of a shaft furnace for waste, Fig. 1b is a sectional view of a conventional flange, Fig. 2 is a plan view of a flange according to the present invention, and Fig. 3a is a perspective view of a metal plate. , Fig. 3b is a plan view of the segment, Fig. 4 is a longitudinal sectional view of the flange showing the fluid passage, Fig. 5 is a longitudinal sectional view of the flange showing the supply/discharge port, and Fig. 6 is a flange showing the supply/discharge part. 7a and 7b are longitudinal sectional views of the flange showing other embodiments of the fluid passage, and FIGS. 8a and 8b show other embodiments of the supply/discharge port, respectively. 9, 10, and 14 are plan views showing other embodiments of the flange, and FIG. 11 is a schematic diagram of the flange showing other embodiments of the supply/discharge portion. 12 is a longitudinal sectional view of FIG. 11,
FIG. 13 is a diagram showing an example of hole machining in the flange segment material of the embodiment shown in FIG. 14. IlO...flange, 11...hole, 1
3'... Metal plate material, 13, 21... Segment, 16... Fluid passage.

Claims (1)

[Claims] 1. An annular flange is constructed by welding one or more segments in which holes for fluid passages are formed in the circumferential direction in the wall portion so that the hole openings coincide with each other. A flange having a characteristic fluid passageway. 2 A long metal plate is provided, straight holes for fluid passages are formed in the wall of the metal plate in the longitudinal direction, and then bent at a predetermined curvature to form segments, one or more A method for manufacturing a flange having a fluid passage, characterized in that the segments are welded so that their hole openings coincide with each other to form an annular flange.