JPH11337223A - Casing structure of dome-shaped regenerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which facilitates the assembling, mounting, repairing and replacement by eliminating the need for welding and soldering in a casing of a dome-shaped regenerator used for a direct fire type absorption refrigerating machine or the like. SOLUTION: In a casing structure which is surrounded by an outermost shell 2 or a casing 6 of a dome-shaped regenerator 1 and has a combustion gas exhaust path D formed between the outermost shell 2 and the casing 6, the casing 6 is divided in two into an upper casing part 14 containing a top plate 14a and a lower casing part 15 containing a bottom plate 15a. Stud bolts 16 are erected in a ceiling wall 4a of a shell body 2 and the upper part 14 and the lower part 15 are detachably interlined by an engagement between a notch 14c or a recessed part formed at any one of both the casings 14 and 15 and a protrusion 15b formed at the other thereof. The notch 14c is an L- shaped notch and is formed by cutting an end rim on the side of the engaged part off any one casing part and the protrusion forms an end cut pawl 15b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing structure of a dome-type regenerator used in a direct-fire absorption refrigerator or the like, and more particularly to a casing structure of a dome-type regenerator which is easy to assemble, install, repair and replace. .

[0002]

2. Description of the Related Art Conventionally, there is a dome type regenerator as a regenerator used in a direct fire type absorption refrigerator or a direct fire type absorption chiller / heater. A regenerator of this type is disclosed in, for example,
As described in Japanese Unexamined Patent Publication No. 256537, a single-body dome-type regenerator, which is a single-body dome-type regenerator 01 as shown in FIG. Inverted bottomed inner cylinder portion 03 having a ceiling wall 03a, and an inverted bottomed outer cylinder portion 04 surrounding the inverted bottomed inner cylinder portion 03 and having a ceiling wall 04a.
And an annular connecting wall portion 05 that integrally connects the inverted bottomed inner cylinder portion 03 and the inverted bottomed outer cylinder portion 04 at a lower portion, and a dome-shaped space A ′ in the inverted bottomed inner cylinder portion 03. Is a combustion chamber,
The space between the outer periphery of the single cylinder 02 (the outer periphery of the inverted bottomed outer cylinder portion 04) and the casing 06 of the regenerator 01 is an exhaust gas passage D ',
On the ceiling wall 04a of the inverted bottomed outer cylinder part 04, an outlet port for the concentrated absorbent and an outlet port for the refrigerant vapor 07 are provided. At the bottom of the single cylinder 02, the diluted absorbent is supplied from outside by the diluted absorbent supply 08. It is supposed to be. Reference numeral 09 denotes a fin fixed to the outer periphery of the inverted bottomed outer cylinder portion 04.

Therefore, the combustion gas generated by the operation of the burner 010 transfers radiant heat to the heat transfer wall surface of the inverted bottomed inner cylinder portion 03 facing the combustion chamber A 'in the combustion chamber A'. Absorbent 01 contained in single body 02 via heat transfer wall
Heat 2

[0004] Next, the combustion gas that has emitted the radiant heat in the combustion chamber A 'enters the passage B' between the combustion tube 011 of the burner 010 and the inverted bottomed inner cylinder portion 03, and enters the inverted bottomed inner cylinder portion. 03
The convection heat is transferred to the heat transfer wall surface of the outer cylinder portion 04 while the convection heat is transferred to the heat transfer wall surface of the outer cylinder portion 04 through the lower communication passage C ′ of the single body 02 and the passage D ′. Most of the remaining convective heat is transferred to the exhaust pipe 013 and released to the atmosphere.

During this time, the absorbing liquid 012 in the single cylinder 02 is heated by the heat transfer from the heat transfer wall surfaces of the inverted bottomed inner cylinder portion 03 and the inverted bottomed outer cylinder portion 04, and is absorbed therein. The refrigerant liquid is evaporated and separated. The refrigerant vapor evaporated and separated in this way and the concentrated absorbent remaining afterwards become a gas-liquid mixture, and a rectifier (see FIG. Not sent). Then, the refrigerant vapor is separated into the refrigerant vapor and the concentrated absorption liquid, and the refrigerant vapor is sent to the next-stage condenser and the concentrated absorption liquid is sent to the next-stage absorber.

[0006]

The conventional dome type regenerator 01 has a simple structure and is excellent in mass productivity and quality irrespective of a single-body type or a double-body type. casing
The top plate 06a, the bottom plate 06b, and the body 06c are divided into three parts, or only the top plate 06a is divided into two parts as separate bodies.
b is divided into two parts as separate bodies (in the case of the illustrated example), or is divided into an upper casing part including the top plate 06a and a lower casing part including the bottom plate 06b. It is formed by being integrated by.

Moreover, the dome type regenerator 01 of the casing 06
When attaching to the body, the mounting hole formed in the center of the top plate 06a is connected to the concentrated absorbent outlet and refrigerant vapor outlet.
07 is assembled and welded to the abutting portion by welding 019 or joined (in the case of the example shown), or the top plate 06a is attached to the dome type regenerator 01.
The casing 06 is attached to the ceiling wall 04a of the fuselage portion by welding and the contact portion is welded to form a dome-type regenerator 01.
Was attached to the torso.

For this reason, a large number of welding steps are required to form the casing 06 and to attach the dome-shaped regenerator 01 to the body, and the operation is complicated. Originally, the casing 06 surrounds the outermost body of the body of the dome type regenerator 01,
At the same time, it is provided to define the low-temperature exhaust gas passage D ', and there is no problem with some gas leakage, and the fins 09 are fixed to the outer periphery of the inverted bottomed outer cylinder portion 04. There is a degree of freedom in the formation and arrangement of the casing 06.

The invention of the present application solves such problems in the conventional dome type regenerator, and facilitates formation (assembly) of the casing and attachment of the dome type regenerator to the body portion. To provide a dome-type regenerator casing structure that is easy to repair and replace

[0010]

SUMMARY OF THE INVENTION The present invention relates to a casing structure of a dome-type regenerator which solves the above-mentioned problems.
In a casing structure of a dome-type regenerator in which an outermost body of a dome-type regenerator is surrounded by a casing, and an exhaust passage for combustion gas is formed between the outermost body and the casing, the casing has a top surface. Divided into an upper casing part including a plate and a lower casing part including a bottom plate,
On the ceiling wall of the body of the dome-type regenerator, stud bolts are implanted, the upper casing portion is inserted through the stud bolts, and fastened with nuts, and the upper casing portion and the lower casing portion are A dome which is detachably connected by engagement of a notch or a recess formed in one of the upper casing portion and the lower casing portion with a projection formed on the other. It is a casing structure of a mold regenerator.

According to the first aspect of the present invention, the casing of the dome type regenerator is divided into an upper casing portion including a top plate and a lower casing portion including a bottom plate. A stud bolt is planted on the ceiling wall of the body of the dome-type regenerator, the upper casing portion is inserted into the stud bolt and fastened with a nut, and the upper casing portion and the lower casing portion are A notch or recess formed in one of the upper casing portion and the lower casing portion,
It is detachably connected by engagement with a projection formed on one of the other.

As a result, formation (assembly) of the casing
Engages a notch or recess formed in one of the upper casing portion and the lower casing portion with a projection formed on the other, thereby integrating the upper casing portion and the lower casing portion. In addition, the casing is attached to the body of the dome-shaped regenerator by inserting the upper casing into stud bolts planted on the ceiling wall of the body of the dome-shaped regenerator, and tightening with a nut. Therefore, no welding or brazing is required, and the operation is not complicated.

Since no welding or brazing is required, no thermal stress is generated in the casing and the body of the dome type regenerator, and the structure is firmly maintained. Further, since it is not affected by weldability or brazing properties, the range of material selection is widened, and a resin material can be used as long as the temperature conditions are satisfied.

Even if the casing is subject to high-temperature corrosion or corrosion due to drainage, if the stud bolt and the nut are disengaged and the notch or recess is disengaged from the projection, it can be easily removed. The entire casing or either the upper casing part or the lower casing part can be replaced, and the casing can be easily repaired.

Further, according to the second aspect of the present invention, the notch is formed as an L-shaped notch, and the L-shaped notch is connected to one of the casing portions. The protrusions are formed by cutting off the edges on the engaging portion side, and the protrusions are cut and raised, so that their formation is facilitated and the engagement work thereof is extremely facilitated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claims 1 and 2 of the present application shown in FIGS. 1 and 2 will be described below. FIG. 1 is a longitudinal sectional view of a dome type regenerator to which the casing structure according to the present embodiment is applied, and FIG. 2 is an exploded perspective view of the casing structure of FIG.

In FIG. 1, a dome-type regenerator 1 to which a casing structure according to the present embodiment is applied is a single-drum dome-type regenerator. Dome-shaped ceiling wall 3
a, a bottomed inner cylinder part 3 surrounding the inverted bottomed inner cylinder part 3 and an inverted bottomed outer cylinder part 4 having a ceiling wall 4a; An annular connecting wall portion 5 integrally connects the cylindrical portion 4 and the lower portion.

A dome-shaped space A in the inverted bottomed inner cylinder portion 3 is used as a combustion chamber, and is formed between the outer periphery of the single cylinder 2 (outer periphery of the inverted bottomed outer cylinder portion 4) and the casing 6 of the regenerator 1. The space between them is an exhaust gas passage D, and a supply port 7 for the dilute absorbent and a discharge port 7 for the refrigerant vapor are provided at the center of the ceiling wall 4a of the inverted bottomed outer cylindrical portion 4. The concentrated absorption liquid is discharged from the concentrated absorption liquid outlet pipe 8
Is derived outside. Fins 9 are fixed to the outer periphery of the inverted bottomed outer cylinder portion 4.

In this embodiment, the rare absorbing liquid is supplied into the single body 2 from the rare absorbing liquid supply port / refrigerant vapor outlet 7, and the concentrated absorbing liquid is supplied to the outside by the concentrated absorbing liquid outlet pipe 8. In this respect, the structure is different from that shown in FIG. 3 of the conventional example, but this is not related to the gist of each invention of the present application.

Therefore, the combustion gas generated by the operation of the burner 10 transmits radiant heat to the heat transfer wall surface of the inverted bottomed inner cylinder portion 3 facing the combustion chamber A in the combustion chamber A, and The absorption liquid 12 contained in the single cylinder 2 is heated via the wall surface.

Next, the combustion gas that has emitted the radiant heat in the combustion chamber A enters a passage B between the combustion cylinder 11 of the burner 10 and the inverted bottomed inner cylinder portion 3, While transmitting convective heat to the heat transfer wall surface, it enters the passage D through the lower communication passage C of the single cylinder 2, rises along the fins 9, and remains on the heat transfer wall surface of the inverted bottomed outer cylinder portion 4. Most of the convective heat is transferred and released from the exhaust stack 13 into the atmosphere.

During this time, the absorbing liquid 12 in the single cylinder 2 is heated by the heat transfer from the heat transfer wall surfaces of the inverted bottomed inner cylinder portion 3 and the inverted bottomed outer cylinder portion 4, and is absorbed therein. The refrigerant liquid is evaporated and separated. The refrigerant vapor evaporated and separated in this manner is sent from the diluted absorption liquid supply port / refrigerant vapor outlet 7 to the next stage condenser.

On the other hand, the absorption liquid after the refrigerant liquid has been evaporated and separated becomes a concentrated absorption liquid, which is accumulated at the bottom of the single cylinder 2 and the concentrated absorption liquid is disposed such that its tip faces the bottom. The liquid is led out to the outside by the liquid lead-out pipe 8 and supplied to the next-stage absorber.

Next, the structure and assembly of the casing 6 and its attachment to the body of the single-body dome-type regenerator 1 will be described. 2, the casing 6 includes an upper casing portion 14 including a top plate 14a.
And a lower casing portion 15 including a bottom plate 15a.

A plurality of stud bolts 16 are circumferentially provided on the ceiling wall 4a of the inverted bottomed outer cylinder portion 4 of the single body 2 forming the body of the single body dome type regenerator 1. In the illustrated example, It is fixed by welding or brazing at six places and is planted.
The upper casing portion 14 is inserted into the stud bolt 16 at the positions of the six mounting holes 14b formed in the top plate 14a and fastened by the nuts 17, and thus the upper casing portion 14 is secured. , Single body dome type regenerator 1
To be attached to the torso.

On the other hand, facing the edge of the lower portion of the upper casing portion 14 on the side of the engaging portion with the lower casing portion 15, there are a plurality of L-shaped cutouts 14c in the circumferential direction, in the example shown in FIG. The L-shaped notch 14c has an L-shaped cutout portion 14d on one side of the L-shape, which is formed along the axial direction of the upper casing portion 14 by cutting off the edge, and is formed on the other side. The notch portion 14e is bent at a right angle to the notch portion 14d on one side and formed along the circumferential direction of the upper casing portion 14.

A connection port 14f of the exhaust pipe 13 is formed at one location above the body of the upper casing portion 14,
The exhaust pipe 13 is connected to the connection port 14f by welding or brazing.

On the other hand, the upper portion of the lower casing portion 15 is close to the edge of the upper casing portion 14 on the side of the engagement portion, and the wall surface of the body portion of the lower casing portion 15 is cut and raised.
15b are formed at a plurality of positions in the circumferential direction, in the illustrated example, at four positions, and the cut-and-raised claws 15b are formed at a lower portion of the upper casing portion 14 as described later in detail. It engages with the L-shaped notch 14c.

At the center opening of the bottom plate 15a of the lower casing portion 15, the combustion tube 11 of the burner 10 is integrally formed. The lower casing portion 15 having such a combustion tube 11 and the bottom plate 15a integrally is However, it is also possible to form the combustion cylinder 11 as a separate body and later connect it to the central opening of the bottom plate 15a of the lower casing portion 15 by welding or the like.

The casing 6 thus divided is attached to the body of the single-drum dome type regenerator 1 as follows. First, the mounting hole 14b of the upper casing portion 14 is inserted into a stud bolt 16 planted in the ceiling wall 4a of the inverted bottomed outer cylinder portion 4 of the single body 2 forming the body of the single body dome type regenerator 1. Then, a nut 17 is screwed from above and tightened. In this way, the upper casing portion 14 is tightened to the body of the single-drum dome-type regenerator 1.

Next, the assembly of the body and the upper casing portion 14 of the single-drum dome-type regenerator 1 obtained in this manner is supported by a jig, so that the assembly is located below the lower inner side of the upper casing portion 14. The casing part 15 is applied, the raised tab 15b of the lower casing part 15 is passed through the notch part 14d of the L-shaped notch 14c of the upper casing part 14, and then the lower casing part 15 and the upper casing part 14 Are rotated relative to each other, and the cut-and-raised claws 15b are
Engage with the notch 14e of c.

The engagement between the cut-and-raised claw 15b and the notch portion 14e is firmly performed to such an extent that the engagement can be released. For this reason, no other means for firmly connecting the lower casing part 15 to the upper casing part 14 are required.

Since the present embodiment is configured as described above, the following effects can be obtained. The casing 6 of the single-drum dome type regenerator 1 is divided into an upper casing portion 14 including a top plate 14a and a lower casing portion 15 including a bottom plate 15a. The upper casing portion 14 and the lower casing portion 15 The L-shaped notch 14c formed in the upper casing portion 14 and the cut-and-raised claw 15b formed in the lower casing portion 15 are detachably connected to each other.

The attachment of the casing 6 to the body of the single-body dome-type regenerator 1 is carried out by mounting the casing 6 on the ceiling of the inverted bottomed outer cylinder portion 4 of the single-body 2 forming the body of the single-body dome-type regenerator 1. Wall 4a
The stud bolt 16 is implanted in the upper casing part
The mounting holes 14b of 14 are inserted into the stud bolts 16 and nuts 17 are screwed from above and tightened, so that the upper casing part
14 is fastened to the body of the single-drum dome type regenerator 1.

As a result, the casing 6 is formed (assembled).
Is an L-shaped notch 14 formed in the upper casing portion 14.
c and the cut-and-raised claw 15 formed in the lower casing part 15
b and the upper casing part 14 and the lower casing part 15 are integrated, and the attachment of the casing 6 to the body of the single-body dome-type regenerator 1 is performed by stud bolts. Using 16 and nut 17,
Since this is performed by fastening the upper casing portion 14 to the body of the single-drum dome-type regenerator 1, no welding or brazing is required, and the operation is not complicated.

Further, since no welding or brazing is required, no thermal stress occurs in the casing 6 and the body of the single-body dome-type regenerator 1, and the structure is firmly maintained. Further, since it is not affected by weldability or brazing properties, the range of material selection is widened, and a resin material can be used as long as the temperature conditions are satisfied.

Even if the casing 6 is subjected to high-temperature corrosion or corrosion due to drainage, the nut 17 is not fastened to the stud bolt 16, and the L-shaped notch 14c and the raised nail 15b are formed. , The entire casing 6 or the upper casing portion 14 and the lower casing portion 15 can be easily replaced.
Can be easily repaired.

Further, the L-shaped notch 14c and the cut-and-raised claw 15
The formation of b is easy, and the engagement work thereof can be performed very easily by hand.

In this embodiment, the dome type regenerator 1
Is a single-body type, but the present invention is not limited to this, and may be a double-body type. The structure of the dome type regenerator is not limited.

The L-shaped notch 14c is provided in the upper casing portion 14, the cut-and-raised claw 15b is provided in the lower casing portion 15, and
Each was formed, but this was reversed and the L-shaped notch
14 c may be formed on the lower casing portion 15, and the cut-and-raised claws 15 b may be formed on the upper casing portion 14.

Further, instead of the L-shaped notch 14c, a concave portion capable of engaging with the cut-and-raised claw 15b may be provided. in this case,
This recess can be obtained by depressing the casing body wall surface from the inside to the outside.

Further, a projection may be used instead of the cut-and-raised claw 15b. In this case, the protrusion can be obtained by deforming the wall surface of the casing body from the inside toward the outside.

Furthermore, although the lower casing portion 15 is fitted to the upper casing portion 14 from below and inside, the invention is not limited to this, and the lower casing portion 15 may be fitted from below and outside. Good. In this case, the raised claws 15
b can be obtained by cutting and raising the casing body wall from the outside to the inside. Various other modifications are possible without departing from the invention of the present application.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dome type regenerator to which a casing structure according to an embodiment of the invention described in claims 1 and 2 of the present application is applied.

FIG. 2 is an exploded perspective view of the casing structure of FIG.

FIG. 3 is a diagram showing a conventional dome type regenerator.

[Explanation of symbols]

1. Dome type regenerator, 2 ... single body, 3 ... inverted bottomed inner cylinder part,
3a: ceiling wall, 4: inverted bottomed outer cylinder part, 4a: ceiling wall, 5
... annular coupling wall portion, 6 ... casing, 7 ... rare-absorbent liquid supply port / refrigerant vapor outlet, 8 ... concentrated absorbent outlet pipe, 9 ... fin, 10 ... burner, 11 ... combustion cylinder, 12 ... absorbent liquid, 13 ... exhaust cylinder, 14 ... upper casing part, 14a ... top plate, 14b ... mounting hole, 14c ... L-shaped notch, 14d, 14e ... notch part,
14f ... exhaust pipe connection, 15 ... lower casing part, 15a ...
Bottom plate, 15b ... cut and raised claw, 16 ... stud bolt, 17 ... nut, A ... combustion chamber, BD ... exhaust gas passage.

Claims (2)

[Claims] 1. A casing structure of a dome-type regenerator, wherein an outermost body of the dome-type regenerator is surrounded by a casing, and an exhaust passage for combustion gas is formed between the outermost body and the casing. The casing, an upper casing portion including a top plate,
And a lower casing part including a bottom plate. A stud bolt is planted on a ceiling wall of a body of the dome type regenerator, and the upper casing part is inserted into the stud bolt and fastened by a nut. The upper casing portion and the lower casing portion are formed by engaging a notch or a concave portion formed on one of the upper casing portion and the lower casing portion with a projection formed on the other. A casing structure for a dome type regenerator, which is detachably connected. 2. The notch is an L-shaped notch, and the L-shaped notch is formed by cutting off an edge of the one of the casing portions on the engaging portion side. 2. The casing structure for a dome-type regenerator according to claim 1, wherein the projection is formed by cutting and raising.