JP2728646B2 - Manufacturing method and structure of cylindrical body in refrigeration / cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing and a structure of a cylindrical body in a tunnel type freezing / cooling apparatus for continuously freezing or cooling while transferring articles such as food.
It is about.

[0002]

2. Description of the Related Art As shown in FIG. 15A, a tunnel type refrigeration / cooling apparatus 70 has a long tubular body 71 installed in a state of being laid on its side. The outlet of the article is opened at the other end of the article, and a transport conveyor 72 extending from the inlet to the outlet is provided inside the main body 71, and a cooler 73 for circulating a refrigerant is provided above the transport conveyor 72. It is arranged so that the article A is frozen while being transported by the transport conveyor 72.

The main body 71 of the conventional apparatus 70 is
Is manufactured by a rectangular heat insulating panel 74 in which a plate-like heat insulating material 74a is wrapped by a metal plate 74b, and a large number of heat insulating panels 74 are combined in a square to form a joint between adjacent heat insulating panels 74. It was formed into a rectangular tube shape by welding.

[0004]

By the way, in the apparatus 70 of this type, since the inside of the main body 71 is cooled down to about 45 degrees below zero, the water inside the main body 71 is completely frozen. However, in the conventional structure of the main body 71, it is difficult as a practical problem to completely close the joints of the adjacent heat insulating panels 74 by welding.
As shown by the arrow C in (B), the phenomenon that the washing water or the like seeps into the gap between the joint portions of the heat insulating panel 74 when the operation is stopped and the water freezes during the operation is repeated.

[0005] Since the volume of water expands when it freezes,
While the operation and the stop of the operation are repeated, there is a problem that the gap at the joint of the heat insulating panel 74 gradually increases, and the water leakage becomes serious. Further, since the metal plate 74b constituting each heat insulating panel 74 is continuous inside and outside the main body 71, the cold heat in the main body 71 is transmitted to the outside through the metal plate 74b, and there is a problem that the heat insulating effect is low. Was.

Further, in addition to the remarkable dissipation of cold heat at the joint of the heat insulating panel 74, water leaks from the joint of the heat insulating panel 74 as described above.
There is also a problem in that a phenomenon occurs in which frost adheres tightly along the joint portion of the heat insulating panel 74 on the outer surface of the heat insulating panel 74. An object of the present invention is to solve these problems.

[0007]

In order to achieve this object, the present invention relates to a cylindrical main body which is installed in a state of being laid on its side.
2 , inside the cooler 9 for freezing or cooling the articles
In the provided said body on one end surface of 2 to an inlet 3 of the article, refrigeration and cooling unit 1 formed by an outlet 4 of the article to the other end face of the body 2, the main body 2, " Book
Inside the outer cylinder 11 made of a metal plate constituting the outer surface of the body 2, a book
The inner cylinder 12 made of a metal plate constituting the inner surface of the body 2 is
Arranged so that there is a gap between cylinder 11 and inner cylinder 12
And the outer cylinder 11 is located below the axis thereof.
At the bottom, a support nut 2 opened inside and outside the outer cylinder 11
8 and a support bolt screwed into the support nut 28
To support the inner cylinder 12 so that it cannot move downward.
Thus, the inner cylinder 12 is supported concentrically with the outer cylinder 11,
In the space between the outer cylinder 11 and the inner cylinder 12,
The heat insulating layer 13 is formed by injecting fat and foaming and solidifying.
Is formed " .

[0008]

With this configuration, the heat insulating layer is formed integrally so as to extend continuously over the entire circumference and the entire length of the main body. Is completely separated over the entire circumference, thus significantly improving the heat insulation performance compared to the past.
(I.e. by reducing heat loss), Ru can be reduced operating costs of the refrigeration and cooling system.

Further, since the inner cylinder and the outer cylinder are manufactured in advance in a cylindrical shape, the washing water and the like do not leak to the outside of the main body when the operation is stopped. Furthermore, since there is no leakage of cold or water from the outer peripheral surface of the main body, it is possible to prevent or significantly reduce frost from adhering to the outer peripheral surface of the main body during operation as in the conventional case. In addition, after inserting the inner cylinder into the outer cylinder, the body is manufactured by a simple operation of injecting a liquid foamable resin between the two cylinders and foaming and solidifying.
Or some et al., It can also improve the efficiency of assembling work as compared conventional manner a large number of insulation panels to the manufacturing method of joining by welding.

[0010] Also, in the state of supporting the inner cylinder to the outer cylinder concentrically by supporting lifting bolts, or is intended to form an insulating layer by injecting a foaming resin between the outer cylinder and the inner cylinder
Therefore, even in the case of a long body, the thickness of the heat insulating layer can be equalized, and after the foaming resin has been foamed and solidified, the support bolt is pulled out, so that cold heat is transmitted to the outer cylinder through the bolt. This can be prevented, and the heat insulating effect can be further improved by the synergistic effect of these two. Special
In addition, when it is configured as in claim 2, the inner cylinder is kept stable.
There are sustainable benefits.

[0011] Still in the configuration of claim 3, it is intended for fastening the leg to the body using the nuts for holding the inner tube in the outer tube and concentrically in the molding of the insulating layer, in other words ,
Supporting the inner cylinder when manufacturing the main body and after manufacturing
Since the same nut can be used for fastening the legs for supporting the main body, there is an advantage that the processing time can be reduced even though the main body has legs with improved heat insulation.

[0012]

[Embodiment of the Invention Next, an embodiment of the present invention will be described with reference to FIGS. 1-14. Among these figures, FIG. 1 (A)
2 is a perspective view of the refrigeration / cooling apparatus 1, FIG. 2B is a partial perspective view of the refrigeration / cooling apparatus 1 viewed from the direction of arrow B in FIG.
FIG. 3 is a vertical front view of the right half of the cooling device 1, and FIG. 3 is a vertical front view of the right half of the cooling / refrigeration device 1.

The refrigeration / cooling apparatus 1 has a main body 2 formed in a cylindrical shape. Both end surfaces of the main body 2 are end plates 2a,
2b are provided, and one end plate 2a has an entrance 3 for the article A, and the other end plate 2b has an exit 4 for the article A. The inlet 3 and the outlet 4 are each formed to be horizontally long, and the end of the supply conveyor 5 enters the inlet 3. On the other hand, a discharge chute 6 is provided at the outlet 4 in an inclined shape.

A shutter 7 for closing the entrance 3 and the exit 4 is mounted on both end plates 2a and 2b of the main body 2 so as to be vertically movable. As shown in FIGS. 2 and 3, a transport conveyor 8 for transporting the article A from the entrance 3 to the exit 4 is disposed inside the main body 2.
A cooler 9 and a fan 10 are arranged above the space.
The articles on the supply conveyor 5 are transferred to the transport conveyor 8, and are frozen or cooled in the course of the transfer on the transport conveyor 8, and then taken out from the discharge chute 6.

Next, details of each part will be described. The main body 2 includes a cylindrical outer cylinder 11, an inner cylinder 12 concentrically arranged inside the outer cylinder 11 at a distance, and an outer cylinder 11 and an inner cylinder 1.
2 and a heat insulating layer 13 made of a foamable material and filled in a space between the two. The outer cylinder 11 and the inner cylinder 12 are both integrally made of a metal plate such as a steel plate. Partition plates 14 are provided at the left and right ends of the inner cylinder 12 in order to suppress cool air from being diffused from the inlet 3 and the outlet 4.

The outer cylinder 11 and the inner cylinder 12 each have a structure in which they are manufactured in a state of being divided into two pieces, and are connected to one piece. doing. The outer cylinder 11 and the inner cylinder 12 are shown in FIG.
6 are connected together by means shown in FIG.
Is a sectional view taken along line IV-IV of FIGS. 2, 3, and 5, and FIG.
-V sectional view, FIG. 6 is an enlarged view of a main part of FIG. 5).

That is, a radially outward flange 15 is fixed by welding to the abutting portion of the left and right members constituting the inner cylinder 12, and this flange 15 is provided with bolts 16 arranged at appropriate intervals along the circumferential direction. Fastened with nuts. Also,
An annular bracket 17 is fixed to the outer peripheral surface of the inner cylinder 12 and the inner peripheral surface of the outer cylinder 11, and the two brackets 17 penetrate through a synthetic resin spacer 18 arranged at appropriate intervals along the circumferential direction. The gap between the outer cylinder 11 and the inner cylinder 12 is kept constant by fastening with the bolts 19 and nuts 20 that have been set.

In this case, as shown in an enlarged view in FIG. 6, both ends of the spacer 18 are formed in a tapered shape with a taper. When formed in this manner, the spacers 18 can be elastically deformed so that the length of the spacers 18 is changed by screwing in the bolts 19, so that even if there are errors in the dimensions and mounting positions of the two brackets 17, the connection can be made reliably. One bracket 17 is fitted with a bush 21 made of a synthetic resin for preventing the bolt 19 and the nut 20 from contacting the one bracket 17. This is to prevent heat from being transmitted from the inner cylinder 12 to the outer cylinder 11 through the metal bolts 19 and nuts 20 having high thermal conductivity, thereby improving heat insulation.

The outer cylinder 11 and the inner cylinder 12 are divided into right and left, but the heat insulating layer 13 is formed as a whole and continuously continuous without being divided. 1 and 4 and 5
As shown in the figure, the space formed between the outer cylinders 11 divided into right and left is closed from the outside by a ring-shaped cover plate 22 made of a metal plate. As shown in FIG. 1 to FIG. 3 and FIG.
Is VII-VII view enlarged view of FIG. 2), the four positions sites along the inner axial direction of the outer cylinder 11, the leg 24 of each pair are connected by lateral bars 26, the outer tube 11 Viewed from the axis direction
And are fixed in a state of being symmetrically arranged. these
Each leg 24 is formed in a square pipe shape, high at the lower end
That have screwed the adjustment of the adjuster bolt 25 is.

A reinforcing plate 27 is fixed by welding to the inner surface of the outer cylinder 11 where the leg 24 is attached.
7 the inner surface of the support nut 28 so as to open the inner outer sides of the reinforcing plate 27 fixed by welding, the outer tube of the leg 24 by concluding bolt 29 which is screwed to the support nut 28 11 is fixed. In this case, the fastening bolt 29
Is set to a short length so as not to contact the inner cylinder 12. Note that the support nut 28 is not limited to be provided by welding, and the outer cylinder 11 or the reinforcing plate 27 may be burred in a cylindrical shape, and a female screw may be formed on the inner peripheral surface with a tap.

An arcuate reinforcing plate 30 is fixed to the outer surface of the inner cylinder 12 at a portion corresponding to each leg 24 by welding. FIG. 8 is an enlarged view of the right end portion of FIG. 2, and FIG. 9 is a sectional view taken along line IX-IX of FIG. As shown in these figures, the transport conveyor 8 is configured as a bar conveyor in which a round bar 32 is mounted between a pair of front and rear endless chains 31, and a drive shaft 33 and a driven shaft 34 (see FIG. 3) is rotatably supported by a pair of front and rear bearings 35 attached to the inner cylinder 12.

One end of the drive shaft 33 protrudes outside the main body 2, and power is transmitted to this one end via a chain 37 from a motor 36 attached to the outer surface of the main body 2. In this case, the outer cylinder 11 and the inner cylinder 12 are held in a non-contact state at one end of the drive shaft 33, and are wrapped with a heat-insulating sealing material 38 such as a synthetic resin.
Prevents cooling heat from dissipating inside.

As shown in an enlarged manner in FIG.
At a plurality of locations along the axial direction on the top surface of
An injection port 40 for forming 3 is provided. As shown in FIG. 2, the main body 2 is inclined at a gentle angle θ with respect to a horizontal plane so that the location of the entrance 3 is low and the location of the exit 4 is high. A drain port 42 is provided on the lower surface.

As shown in FIG. 9, the drain port 42 extends obliquely in a direction perpendicular to the axis. The tip of the drain port 42 is closed by a detachable cover 43, and the drain port 4
A downward drain pipe 43 is connected to the distal end of the pipe 2. The drain pipe 43 partially enters a bucket 45 storing water. The bucket 45 is formed so as to maintain a constant water depth. Water overflowing from the bucket 45 is discharged to a drain or the like. Although not shown, cover 4
Numeral 3 is configured to contact the tip of the drain port 42 via a heat insulating material.

FIG. 10 is a sectional view taken along the line XX of FIG. 1. As shown in FIGS. 1 and 10, on both sides of the left and right ends of the main body 2, a person enters the main body 2 to perform an assembling operation. A manhole hole 47 provided with a lid 46 is opened for inspection and inspection. As shown in FIG.
Is mounted on the outer cylinder 11 so as to be rotatable horizontally, and a handle 49 having a lock mechanism is provided at a free end thereof. The inside of the lid 46 is also filled with a heat insulating material 50.

In this case, in order to improve the heat insulation, the cover 46 is used.
A heat insulating member 51 is sandwiched between the joints between the inner plate 46a and the outer plate 46b, and a heat insulator 52 is also sandwiched between the side plate 47a of the manhole 47 and the outer cylinder 11. Further, a heat-insulating member 53 such as a tube is sandwiched between a contact point between the opening edge of the manhole hole 47 and the lid 46.

As shown in FIGS. 2 and 3, the fan 10 is covered with a cover 10a. A refrigerant passage is formed in a zigzag shape inside the cooler 9, and as shown in FIG.
And the discharge pipe 57 are connected. In passing the inflow pipe 56 and the discharge pipe 57 through the main body 2, the inner cylinder 12
A pipe 58 having a larger diameter than the inflow pipe 56 and the discharge pipe 57.
And a pair of upper and lower gunmetal bushes 59 and 60 are screwed into female screws 58a formed at the upper end of the pipe 58, and are formed in grooves formed on the inner peripheral surface of the connection portion between the upper and lower bushes 59 and 60. The O-ring 61 is fitted, and the inflow pipe 56 and the discharge pipe 57 are tightened from the outside of the radius by the O-ring 61, so that the inflow pipe 56 and the discharge pipe 5 can be flexibly provided.
7 is supported.

The outer cylinder 11 is provided with a cylindrical portion 62 surrounding the pipe 58. By interposing the heat insulating layer 13 between the cylindrical portion 62 and the pipe 58,
The insulation is improved. Inflow pipe 56 and discharge pipe 57
Is covered with a heat insulating tube 63. As shown in FIGS. 2 and 3, a shower pipe 64 that sprays a detergent or cleaning water downward is mounted above the left and right coolers 9 so as to extend in the axial direction. A water supply pipe 65 is attached to the shower pipe 64.
Are connected.

A steam injection port 66 for sterilization is provided below the center of both coolers 9 in the lower portion of the main body 2. When the operation is stopped, the shutters 7 at both ends are closed, and detergent and washing water are used. After cleaning, sterilization is performed by ejecting high-temperature steam from the steam injection port 66 for a predetermined time. In this case, since the main body 2 is inclined, the cleaning water or the steam that has been heated flows into the discharge port 4 and is discharged to the outside.

Next, an outline of an assembling procedure (manufacturing method) of the main body 2 in the refrigeration / cooling apparatus 1 will be described with reference to FIG. First, the outer cylinder 11 and the inner cylinder 12 are manufactured in a state of being divided into halves, respectively, and then, as shown in (A), the halves of the inner cylinder 12 are fitted into the halves of the outer cylinder 11 respectively. The outer cylinder 11 and the inner cylinder 12 are joined as shown in FIG. Before this joining, the internal members such as the cooler 9, the fan 10, and the conveyor 8 are put in the inner cylinder 12.
Those that can be attached in advance should be attached. The outer cylinder 11 is held horizontally by a receiving stand (not shown).

When the outer cylinder 11 and the inner cylinder 12 are joined to one piece, respectively, as shown in FIGS.
A support bolt 67 is screwed from the outside into each support nut 28 for mounting the inner cylinder 4, and the inner cylinder 12 is supported by the support bolt 67, so that the inner cylinder 12 is held concentrically with the outer cylinder 11. deep. Next, as shown in (C) and (D), a nozzle 68 is attached to the injection port 3 provided on the outer surface of the outer cylinder 11, and a foamable resin liquid such as urethane foam resin or styrene foam resin is injected from the nozzle 68. By foaming and solidifying this, the heat insulating layer 13 in a state in which the space between the outer cylinder 11 and the inner cylinder 12 is filled without gaps is integrally formed, thereby completing the main body 2.

In this case, as shown in FIG. 14, when the space between the outer cylinder 11 and the inner cylinder 12 is open to the outside, for example, at the insertion point of the refrigerant inflow pipe 56, the opening May be closed with an adhesive tape 69 made of cloth, paper, or the like, and the adhesive tape 69 may be peeled off after the heat insulating layer 13 is formed (since the injection pressure of the resin liquid to be the heat insulating layer 13 is not high,
Even if the opening is closed with the adhesive tape 69, the resin liquid does not leak.)

After inserting the inner cylinder 12 into the outer cylinder 11 manufactured in a state of being cut in half, the heat insulating layer 13 is kept in that state.
Then, after the outer cylinder 11 and the inner cylinder 12 are joined together, the space at the joint may be filled with a heat insulating layer. Et the body 2 is produced, the refrigerant inflow pipe 56
And wiring to the fan 10 such as the discharge pipe 57 and the like, mounting of the cover 46 of the manhole 47, mounting of the conveying bay 8, etc.
Various attachment members are mounted, and after this, the support bolt 66 is removed, and the leg 24 is fixed to the outer cylinder 11 with the fastening bolt 29.

As described above, in the present invention, since the outer cylinder 11 and the inner cylinder 12 of the main body 2 are shut off over the entire circumference by the heat insulating layer 13, the main body is manufactured by joining the heat insulating panels as in the conventional case. It is possible to remarkably improve the heat insulating property as compared with the case where the heat is applied, and to prevent or significantly reduce the formation of frost on the outer peripheral surface of the main body. Further, since the inner cylinder 12 is integrally manufactured in a tubular shape, there is no leakage of cleaning water or the like during non-operation.

Further, the inner cylinder 12 is connected to the outer cylinder 1 with the support bolt 66.
1 and because while supporting concentrically and performs injection of the foamable resin, while the length of the elongate body 2, than it is possible to equalize the thickness of the sectional heat layer 13, also,
After the heat insulating layer 13 is foamed and solidified, the support bolts 66 are extracted, so that no cooling heat is transmitted to the outer cylinder 11 through the support bolts 66, and thus the heat insulation can be further improved.

Furthermore, when fastening the leg 24 using a support nut 28 is screwed a supporting lifting bolts 66, can be further improved thermal insulation without complicating the structure. If the main body 2 is installed at an angle and the drain port 4 is provided at the lower end as in the embodiment, there is an advantage that drainage of cleaning water, sterilizing steam and the like can be performed without trouble. When the downward drain pipe 44 provided at the outlet 4 is immersed in the water in the bucket 45 as in the embodiment, the drain pipe 44 can be easily sealed by drainage (the inside of the main body 2 is heated with high-temperature steam). In the case of disinfection, the hot water in which steam condenses accumulates in the bucket 45 and the drain pipe 44 is sealed by the hot water, so that the heat of the steam is prevented from escaping to the outside, which is particularly beneficial.

Further, as in the embodiment, the outer cylinder 11 and the inner cylinder 1
When the body 2 is manufactured after being divided into a plurality of pieces and connected, even if both ends of the main body 2 are closed by end plates 2a and 2b ,
There is an advantage that the internal members can be easily incorporated at the time of assembly. In the above embodiment, a bar conveyor is used as the transport conveyor, but it goes without saying that other types of conveyors such as a net conveyor and a chain conveyor may be used.

[Brief description of the drawings]

FIG. 1A is a perspective view of an apparatus, and FIG. 1B is a perspective view of FIG.

FIG. 2 is a vertical sectional front view of a substantially right half of FIG. 1 (A).

FIG. 3 is a vertical sectional front view of a substantially left half of FIG. 1 (A).

FIG. 4 is a sectional view taken along line IV-IV of FIGS. 2, 3, and 5;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a partially enlarged view of FIG. 5;

7A is a sectional view taken along line VII-VII of FIG. 2, and FIG. 7B is a partially enlarged view of FIG.

FIG. 8 is an enlarged view of a right end portion of FIG. 2;

9A is a sectional view taken along line IX-IX of FIG. 8, and FIG. 9B is an enlarged view of a resin injection port.

FIG. 10 is a sectional view taken along line XX of FIG. 1;

FIG. 11 is a sectional view taken along line XI-XI of FIG. 2;

FIG. 12 is an enlarged view of a main part of FIG. 11;

FIG. 13 is a view schematically showing a procedure for assembling the apparatus.

FIG. 14 is a view showing a part of the main body in a step of injecting a resin liquid to be a heat insulating layer.

15A is a perspective view of a conventional device, and FIG. 15B is a cross-sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Freezing / cooling apparatus 2 Main body 3 Inlet 4 Outlet 8 Conveyor 9 Cooler 11 Outer cylinder 12 Inner cylinder 13 Heat insulation layer 24 Leg 28 Supporting nut 29 Fastening bolt 40 Resin injection port 66 Supporting bolt

Claims (3)

(57) [Claims] 1. A cooler for freezing or cooling articles inside a cylindrical main body 2 installed in a horizontal state.
9 is provided, said forming an inlet 3 of the article on one end surface of the main body 2, producing side of the main body 2 to the other end surface of the main body 2 in the refrigeration and cooling unit 1 formed by an outlet 4 of the article
Inside the outer cylinder 11 made of a metal plate constituting the outer surface of the main body 2,
The inner cylinder 12 made of a metal plate constituting the inner surface of the main body 2 is
Arranged so that there is a gap between outer cylinder 11 and inner cylinder 12
And the outer cylinder 11 is located below the axis thereof.
At the bottom, a support nut 2 opened inside and outside the outer cylinder 11
8 and a support bolt screwed into the support nut 28
To support the inner cylinder 12 so that it cannot move downward.
Thus, the inner cylinder 12 is supported concentrically with the outer cylinder 11,
In the space between the outer cylinder 11 and the inner cylinder 12,
The heat insulating layer 13 is formed by injecting fat and foaming and solidifying.
Forming a cylindrical body in a refrigeration / cooling apparatus, characterized by forming
Law. 2. The method according to claim 1, wherein a bottom of said outer cylinder is provided.
Of the outer cylinder 11 is substantially symmetrical when viewed from the axial direction of the outer cylinder 11.
The support nut 28 is provided at the position, and these support nuts are provided.
The inner cylinder 12 is moved outward by the support bolt 67 screwed to the
The outer cylinder 11 and the inner cylinder 1 are supported concentrically with the cylinder 11 in that state.
Inject a liquid foamable resin into the space between
The heat insulation layer 13 is formed by
By removing disconnect the lifting bolts 67 from the support nut 28, producing side of the cylindrical main body in the refrigeration and cooling unit, characterized in
Law. 3. The method according to claim 1 or claim 2.
A cylindrical main body 2 in the produced refrigeration / cooling device,
The support nut after removing the support bolt 67
The main body 2 is supported by fastening bolts 29 screwed into
The leg 24 to be held is fixed to the outer surface of the outer cylinder 11 , and
The structure of the cylindrical main body in the refrigeration / cooling device, wherein the fastening bolt 29 is not brought into contact with the inner cylinder 12 .