JP2000154976A - Sealing structure of opening, heat exchanger and method for sealing opening of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacture a sealing structure of an opening by sequentially screw-clamping a cylinder and a cover for covering the one opening of the cylinder through a sealing member. SOLUTION: Heat transfer tubes 2 are coaxially disposed in a shell 1 of a cylindrical container, and tube plates 3, 4 are respectively mounted at both ends of the shell 1. An inlet 7 and an outlet 8 of a secondary fluid are formed at an upper portion of the shell 1. Further, covers 40, 41 are respectively mounted at the plates 3, 4 in opening of both the ends of the shell 1. An inlet 5 and an outlet 6 of a primary fluid are formed at the cover 40. In the case of mounting the cover 40 at the shell 1, the cylinder and the cover are sequentially mounted at the plate 3 with packings 44, 45. That is, the packing 44, the cylinder, the packing 45 and the cover are sequentially screw-clamped at the plate 3. Meanwhile, in the case of the cover 41, the packing 46, the cylinder, the packing 47 and the cover 41b are sequentially screw-clamped at the plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing structure for an opening, such as a shell-and-tube heat exchanger, in which an end is sealed by a lid, and a heat exchanger provided with such a sealing structure. And a method for sealing an opening of a heat exchanger.

[0002]

2. Description of the Related Art Conventionally, as a heat exchanger, a large number of heat transfer tubes are coaxially arranged in the body of a horizontally arranged cylindrical container,
It is known that heat is exchanged by flowing two fluids in the heat transfer tube and the body. FIG. 4 shows an example of a conventional heat exchanger. In FIG. 4, a large number of heat transfer tubes 2, 2,... Are provided coaxially in a body 1 of the heat exchanger. The ends of the heat transfer tubes 2, 2,... Are fixed to tube plates 3, 4 attached to both ends of the body 1, respectively. A primary fluid (for example, cooling water in the case of a heat exchanger of a refrigeration system) flows through these heat transfer tubes 2, 2,. This primary fluid is supplied to a primary fluid inlet 5 provided at one end of the cylinder 1.
, And after passing through the heat transfer tubes 2, 2,.

On the other hand, a fluid to be heated or cooled by a heat exchanger (eg, a gas refrigerant in the case of a heat exchanger of a refrigeration system) is
After flowing into the body 1 from a secondary fluid inlet 7 provided at the upper part of the body 1, heat is exchanged by the heat transfer tubes 2, 2, and then flows out from the secondary fluid outlet 8.

[0004] Further, lids (hereinafter referred to as covers) 9 and 10 are attached to the tube sheets 3 and 4 at openings at both ends of the body 1 respectively. The covers 9, 10 are, for example, curved surfaces having cover flanges 11, 12 around them, and therefore spaces 13, 14 are formed between the covers 9, 10 and the tubesheets 3, 4.

FIG. 5 is a sectional view of the cover 9 on the primary fluid inlet 5 and primary fluid outlet 6 side. FIG. 5B shows an AA ′ cross section of FIG. As shown in this figure, a partition plate 15 is provided on the cover 9 to thereby partition the space 13 into upper and lower spaces 13a and 13b. Also, the primary fluid outlet 6 is provided on the curved surface 9a of the cover 9.
And a primary fluid inlet 5 are formed.
Fluid flows into the lower space 13b from the upper space 13b.
The fluid a flows out from the primary fluid outlet 6. This prevents the inflowing primary fluid and the outflowing primary fluid from mixing.

FIG. 6 shows another example of a conventional heat exchanger. The heat exchanger shown in this figure has a plurality of cylinders 21a, 2
1b are connected in series, and an intermediate flange 22 is arranged between them. These trunks 21a, 21b
(Hereinafter, a combination of these is referred to as a cylinder 21) is provided with a secondary fluid inlet 24 at an upper portion and a secondary fluid outlet 25 at a lower portion.

In the case of the heat exchanger shown in FIG.
Covers 2 attached to tube plates 3 and 4 at both ends of 1
8, 29 have a cylindrical shape and a disk-shaped lid 28.
a, 29a, and cylindrical members 28b, 29b whose diameters are smaller than the diameters of the lids 28a, 29a, respectively. The cover 28 is provided with the primary fluid inlet 5 and the primary fluid outlet 6. Here, FIG. 7 shows a cross-sectional view of the cover 28. FIG. 7 (b) is a cross-sectional view of FIG.
The B 'section is shown. As shown in this figure, the cover 28 is provided with a partition plate 32, which
A space 33 formed between the tube and the tube sheet 3 (FIG. 6) is divided into upper and lower spaces 33a and 33b. Also, the cover member 2
8a, a primary fluid outlet 6 and a primary fluid inlet 5 are formed.

[0008]

By the way, in the above-mentioned conventional heat exchanger, the covers 9 and 10 and the covers 28 and 2 are not provided.
No. 9 was manufactured as a casting or by welding each member. For example, in the case of the cover 9 shown in FIG. 5, the curved surface portion 9a, the cover flange 11, and the partition plate 15 are separately formed and assembled by welding them.
That is, the members are joined by welding at the welded portions W, W,. In the case of the cover 28 shown in FIG. 7, the lid 28a, the cylindrical portion 28b, and the partition plate 3
2 were prepared separately, and they were joined by welding at the welds W, W,. In the case of the cover 10, the curved surface portion 10a, the cover flange 12, the cover 2
In the case of No. 9, the lid portion 29a and the cylindrical portion 29b were each assembled by welding. Then, the covers 9, 10, 28, 29 manufactured as described above are attached to the packings 34, 35.
(FIG. 4) and screws 36 and 37 (FIG. 6) were screwed to the tube sheets 3 and 4, respectively.

As described above, since the cover is assembled by welding, there is a problem that the production of the heat exchanger itself is troublesome. In addition, there is a problem that it is impossible to disassemble the cover and perform cleaning or the like once it is manufactured, either in the case of welding or in the case of manufacturing as a casting.

[0010] The present invention has been proposed to solve the problems of the prior art as described above.
An object of the present invention is to provide a sealing structure of an opening which is easy to manufacture by using a cover that does not require welding and can be disassembled, and a heat exchanger including the same.

[0011]

According to the first aspect of the present invention,
In a sealing structure of an opening for sealing an opening by a lid having a space and a partition plate for partitioning the space inside, a tube obtained by cutting out a plate material having a thickness corresponding to the space and integrally processing the partition plate. A part and a lid that covers one opening of the cylindrical part are sequentially screwed to the opening via a sealing member.

According to a second aspect of the present invention, there is provided a heat exchanger in which an end portion of a cylindrical body is sealed by a lid having a space and a partition plate for partitioning the space inside, and a thickness corresponding to the space is provided. A cylindrical portion formed by cutting out a plate material having a thickness and integrally processing the partition plate, a lid portion covering one opening of the cylindrical portion, and a second portion disposed between an end portion of the body and the cylindrical portion. 1 seal member, and a second seal member disposed between the cylindrical portion and the lid portion, wherein the first seal member, the cylindrical portion, the second seal member, and the lid The parts are sequentially screwed.

According to a third aspect of the present invention, there is provided a method of sealing an opening of a heat exchanger, wherein an end of a cylindrical body of the heat exchanger is sealed with a lid having a space and a partition plate for partitioning the space. In the above, a tubular portion formed by cutting out a plate material having a thickness corresponding to the space and integrally processing the partition plate, and a lid portion that covers one opening portion of the tubular portion are formed, and the tubular portion and the lid portion are formed. Are sequentially screwed to the end of the body via a sealing member.

According to the first, second or third aspect of the present invention, a lid portion and a cylindrical portion obtained by cutting a plate material and integrally processing a partition plate are formed, and these are screwed into an opening portion by a sealing member. No welding is required to stop. Therefore, manufacture is easy and disassembly becomes possible.

A fourth aspect of the present invention is characterized in that, in the third aspect of the present invention, the cylindrical portion is processed by a thermal cutting method including gas cutting, laser cutting, and plasma cutting. According to the fourth aspect of the present invention, it is possible to process a thick plate, so that even if the space formed inside the lid is large, the plate can be cut out correspondingly.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The same members as those described in the above-described related art are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 shows a heat exchanger according to an embodiment of the present invention. The heat exchanger according to the present embodiment includes, similarly to the conventional heat exchanger shown in FIG. 4, a cylindrical vessel body 1 arranged horizontally, and heat transfer tubes 2, 2 arranged coaxially inside thereof.
Tube plates 3 and 4 attached to both ends of the body 1 are provided. Further, a secondary fluid inlet 7 and a secondary fluid outlet 8 are formed in the upper part of the body 1 in the same manner as the heat exchanger shown in FIG. Further, covers 40 and 41 are attached to the tube sheets 3 and 4 at openings at both ends of the body 1, respectively. The cover 40 has a primary fluid inlet 5 and a primary fluid outlet 6 formed therein.

FIG. 2 is an exploded sectional view of the cover 40. As shown in FIG. As shown in this figure, the cover 40 is
a and the cylindrical portion 40b. Further, a primary fluid inlet 5 and a primary fluid outlet 6 are formed in the lid 40a. The cylindrical portion 40b has a horizontal length L.
Is, for example, 20 to 100 mm. FIG. 3A is a cross-sectional view of the lid 40a taken along the line CC ′, and FIG. 3B is a cross-sectional view of the cylindrical portion 40b taken along the line DD ′.

As shown in FIG. 3B, the cylindrical portion 40b
Is integrally formed with a partition plate 43 for partitioning the internal space into two spaces 42a and 42b. This cylindrical part 4
No. 0b is manufactured by cutting a thick plate material having a thickness of about 20 to 100 mm into a shape of the spaces 42a and 42b by a thermal cutting method such as gas cutting, laser cutting or plasma cutting. In the case of the cover 41 at the other end of the body 1 shown in FIG. 1, it is manufactured by cutting a plate material into a cylindrical shape without the partition plate 43 by the above method.

When the cover 40 is attached to the body 1, the packing 44 and the packing 44 are attached to the tube sheet 3 shown in FIG.
The cylindrical portion 40b and the lid portion 40a are sequentially attached via 45. That is, the packing 44 and the cylindrical portion 40
b, the packing 45 and the lid 40a are sequentially screwed.
On the other hand, in the case of the cover 41, the packing 46,
The cylindrical portion 41a, the packing 47, and the lid portion 41b are sequentially screwed.

The cover 40a corresponds to the cover in the claims, and the cylindrical portion 40b corresponds to the cylinder in the claims. Further, the packings 44 and 45 are provided in the first aspect.
The packing 44 corresponds to the sealing members of FIGS.
The first sealing member and the packing 45 correspond to the second sealing member according to the third aspect.

The opening sealing structure and the heat exchanger of the present invention are not limited to the above-described embodiment, and the specific shapes of the respective members or the mounting positions and methods of the respective members are appropriately changed. It is possible.

For example, the method of cutting the plate material constituting the cylindrical portion is not limited to the above-described method, and any other method may be used if possible according to the thickness of the plate material. Further, the shape of the partition plate is not limited to the above shape as long as the shape partitions the space in the cover. Furthermore, the shape of the body is not limited to a cylindrical shape,
Other cylindrical shapes may be used. In addition, as long as it has a structure in which the opening is sealed by a cover having a partition plate, the present invention can be adopted not only in the heat exchanger but also in other devices such as a pressure vessel.

[0024]

As described above, according to the present invention, according to the present invention, a lid portion and a cylindrical portion formed by cutting a plate material and integrally processing a partition plate are formed, and these are screwed to the opening portion by a sealing member. Because of the configuration, welding is unnecessary, and therefore, it is possible to provide a sealing structure of an opening which can be easily manufactured and disassembled, and a heat exchanger.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a heat exchanger according to an embodiment of the present invention.

FIG. 2 is an exploded sectional view showing a configuration of a cover 40 according to the embodiment.

FIG. 3A is a view showing C- of a lid 40a according to the embodiment;
C 'sectional view, (b) is a cylindrical portion 40b according to the same embodiment.
DD ′ sectional view

FIG. 4 is a cross-sectional view showing a configuration of a conventional heat exchanger.

5A is a cross-sectional view of the cover 9 of the heat exchanger shown in FIG. 4, and FIG. 5B is a cross-sectional view taken along the line AA ′ of FIG.

FIG. 6 is a sectional view showing another configuration of a conventional heat exchanger.

7A is a sectional view of a cover 28 of the heat exchanger shown in FIG. 6, and FIG. 7B is a sectional view taken along the line BB 'of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Heat transfer tube 3, 4 ... Tube plate 5 ... Primary fluid inlet 6 ... Primary fluid outlet 7 ... Secondary fluid inlet 8 ... Secondary fluid outlet 40, 41 ... Cover 40a ... Lid 41b ... Cylindrical part 42a, 42b: Space 43: Partition plate 44, 45, 46, 47: Packing

Claims (4)

[Claims] In a sealing structure of an opening for sealing an opening by a lid having a space and a partition plate for partitioning the space inside, a plate material having a thickness corresponding to the space is cut out to form the partition plate. A sealing structure for an opening, wherein an integrally machined cylindrical portion and a lid covering one opening of the cylindrical portion are sequentially screwed to the opening via a sealing member. 2. A heat exchanger in which an end of a cylindrical body is sealed by a lid having a space and a partition plate for partitioning the space therein, wherein a plate material having a thickness corresponding to the space is cut out. A cylindrical portion integrally processing the partition plate, a lid portion covering one opening of the cylindrical portion, a first seal member disposed between an end portion of the body and the cylindrical portion, A second seal member disposed between the cylindrical portion and the lid portion, wherein the first seal member, the cylindrical portion, the second seal member, and the lid portion are sequentially screwed. A heat exchanger, comprising: 3. A method of sealing an opening of a heat exchanger, wherein an end of a cylindrical body of the heat exchanger is sealed by a lid having a space and a partition plate for partitioning the space inside the body. A cylindrical member formed by cutting out a plate material having a thickness to be processed and integrally forming the partition plate, and a lid portion covering one opening of the cylindrical portion, and forming the cylindrical portion and the lid portion at the end of the body. A method of sealing an opening of a heat exchanger, comprising sequentially screwing a screw to a portion via a sealing member. 4. The method for sealing an opening of a heat exchanger according to claim 3, wherein the cylindrical portion is processed by a thermal cutting method including gas cutting, laser cutting, and plasma cutting.