JP2001088894A - Tank apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability of a tank apparatus, simplify a structure and reduce a cost. SOLUTION: The tank apparatus has a tank internal plate 52, a jacket plate 53 forming a jacket 54 between the tank internal plate 52 and itself, a medium supply port 56 formed at a predetermined height position on the jacket plate 53, a medium discharge port 57 formed at a predetermined height position on the jacket plate 53, an overflow port 61 formed at a predetermined height position on the jacket plate 53, a level detecting means for detecting a level of a medium, a medium flow control means for pressure-feeding the medium discharged from the medium discharge port 57, and a controller for driving the medium flow control means according to the level of the medium in the jacket 54. A medium reservoir 64 can be formed inside the jacket 54, eliminating need for a collection tank of the medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a tank device.

[0002]

2. Description of the Related Art Conventionally, in a tank device, when cooling, heating, or keeping the temperature of a liquid contained in a tank inner plate, a refrigerant, a jacket, formed outside the tank inner plate, A medium such as a heat medium is circulated to perform heat exchange between the medium and the liquid.

[0003] The jackets are classified into a closed jacket in which a flow path through which a medium is circulated in the jacket is closed, and an open jacket in which the flow path is opened to the atmosphere. It is classified into a jacket and a dimple-type closed jacket. The circulation method of the medium is classified into a forced circulation method in which the medium is circulated from below to above in the jacket, and a natural circulation method in which the medium is circulated from above to below in the jacket by natural fall. .

FIG. 2 is a view showing a conventional tank device provided with a spiral circulation type jacket of a forced circulation type.

[0005] In the drawing, reference numeral 11 denotes a tank device, 12 denotes a tank inner plate for storing liquid, and 13 denotes a jacket plate disposed at a predetermined distance outside the tank inner plate 12. A jacket for circulating the medium is formed between the jacket 12 and the jacket plate 13. In this case, the jacket plate 13 extends from a lower end of the tank inner plate 12 to a predetermined height position above, and an upper end portion of the tank inner plate 12 is exposed. Reference numeral 15 denotes a reinforcing plate that connects the tank inner plate 12 and the jacket plate 13 and prevents the jacket plate 13 from being deformed by pressure, external force, and the like in the jacket. The reinforcing plate 15
By spirally extending and joining both edges to the tank inner plate 12 and the jacket plate 13 by welding or the like, a spiral sealed flow path 14 is formed in the jacket. Therefore, the medium can be forcibly circulated along the flow path 14 in the jacket, and heat exchange between the medium and the liquid can be performed.

A liquid supply / discharge port 18 is formed at the lower end of the tank inner plate 12, and the liquid is supplied into the tank inner plate 12 through the liquid supply / discharge port 18 in the direction of the arrow. 12 can be discharged in the direction of the arrow. The medium supply port 2 is provided at the lower end of the jacket plate 13.
0, a medium outlet 22 is formed at the upper end of the jacket plate 13, and the medium is supplied to the jacket through the medium supply port 20 in the arrow direction, or the medium is fed from the jacket through the medium outlet 22 in the arrow direction. And can be discharged.

FIG. 3 is a view showing a conventional tank apparatus provided with a dimple-type closed jacket of a forced circulation system.

In FIG. 1, reference numeral 21 denotes a tank device, 12 denotes a tank inner plate for containing a liquid, and 23 denotes a jacket plate provided outside the tank inner plate 12.
When the jacket plate 23 is joined to the tank inner plate 12 by welding or the like, a medium is formed between the tank inner plate 12 and the jacket plate 23 by welding or the like. A closed flow path 24 for circulating is formed. Therefore, the medium can be forcibly circulated along the flow path 24 to perform heat exchange between the medium and the liquid.

In this case, the jacket plate 23 extends from a predetermined lower position on the tank inner plate 12 to a predetermined upper position on the tank inner plate 12, and a lower end portion and an upper end portion of the tank inner plate 12 are exposed. Can be

A liquid supply / discharge port 18 is formed at the lower end of the tank inner plate 12 to supply a liquid into the tank inner plate 12 through the liquid supply / discharge port 18 in the direction of the arrow. 12 can be discharged in the direction of the arrow. A medium supply port 3 is provided at the lower end of the jacket plate 23.
1, a medium discharge port 32 is formed at the upper end of the jacket plate 13, and the medium is supplied to the jacket through the medium supply port 31 in the arrow direction or from the jacket through the medium discharge port 32 in the arrow direction. And can be discharged.

However, in the tank device 11 (FIG. 2), both edges of the reinforcing plate 15 are joined to the tank inner plate 12 and the jacket plate 13 by welding or the like. When a temperature difference occurs between the tank inner plate 12 and the jacket plate 13, the tank inner plate 12
And a difference in the amount of expansion and contraction between the jacket plate 13. In that case, stress is generated at a joint between the both edges of the reinforcing plate 15 and the tank inner plate 12 and the jacket plate 13, and the joint may be damaged.

Further, in the tank device 21, the flat (spring) portion 25 and the tank inner plate 12 are joined by welding or the like. When a temperature difference occurs between the jacket plate 23 and the jacket plate 23, a difference in the amount of expansion and contraction occurs between the tank inner plate 12 and the jacket plate 23. In this case, stress is generated at the joint between the flat portion 25 and the tank inner plate 12, and the joint may be damaged. Therefore, the durability of the tank devices 11 and 21 is reduced.

Therefore, it is conceivable to use a tank device provided with an open jacket of a natural circulation system.

FIG. 4 is a first view showing a conventional tank apparatus provided with an open jacket of a natural circulation system.

In FIG. 1, reference numeral 41 denotes a tank device, 12 denotes a tank inner plate for containing a liquid, and 33 denotes a jacket plate disposed at a predetermined distance outside the tank inner plate 12. A jacket 34 is formed between the jacket 12 and the jacket plate 33, and the jacket 34 serves as a flow path open to the atmosphere for circulating the medium. In this case, the jacket plate 33 is extended from a lower end of the tank inner plate 12 to a predetermined height position above, and an upper end portion of the tank inner plate 12 is exposed.

A liquid supply / drain port 18 is formed at the lower end of the tank inner plate 12 to supply a liquid into the tank inner plate 12 through the liquid supply / drain port 18 in the direction of the arrow. 12 can be discharged in the direction of the arrow. The medium supply port 3 is provided at the upper end of the jacket plate 33.
6, a medium outlet 37 is formed at the lower end of the jacket plate 33. The medium is supplied to the jacket 34 through the medium supply port 36 in the direction of the arrow, or the medium outlet 37 is formed.
Through the jacket 34 in the direction of the arrow.

In this case, since the jacket 34 is open to the atmosphere, the pressure in the jacket 34 becomes approximately atmospheric pressure. Therefore, the reinforcing plate as shown in FIG. Then, the medium supplied to the jacket 34 via the medium supply port 36 naturally falls along the surface of the tank inner plate 12 in the jacket 34, and is accumulated in the lower part.

FIG. 5 is a second view showing a conventional tank apparatus having an open jacket of a natural circulation system. In addition, about what has the same structure as the tank apparatus 41 shown in FIG. 4, the description is abbreviate | omitted by attaching | subjecting the same code | symbol.

In the drawing, reference numeral 43 denotes a recovery tank for storing and recovering the medium discharged from the jacket 34 through the medium discharge port 37, and reference numeral 44 denotes the medium recovered in the recovery tank 43 via a heat exchanger (not shown). This is a pump that feeds the medium to the medium supply port 36.

[0020]

However, in the conventional tank device 41, the medium is covered with the jacket 34.
Since the recovery tank 43 is required to supply the water to the tank, not only the structure of the tank device 41 becomes complicated, but also the cost increases.

The present invention solves the above-mentioned problems of the conventional tank device, and provides a tank device capable of improving the durability, simplifying the structure and reducing the cost. The purpose is to:

[0022]

For this purpose, in the tank device of the present invention, a tank inner plate for containing a liquid and a tank inner plate arranged at a predetermined distance outside the tank inner plate are provided. A jacket plate forming a jacket for circulating the medium, a medium supply port formed at a predetermined height position in the jacket plate to supply a medium to the jacket, A medium discharge port for discharging a medium from the jacket, an overflow port formed at a predetermined height position on the jacket plate, for overflowing the medium from the jacket, and the jacket. Level detecting means for detecting the level of the medium in the medium, medium flow controlling means for pressure-feeding the medium discharged from the medium discharge port, and Tsu to correspond to the level of the medium in bets and a control device for driving the medium flow control means.

In another tank device of the present invention, the upper end of the jacket plate and the tank inner plate are not fixed.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a view showing a tank apparatus having a natural circulation type open jacket according to a first embodiment of the present invention, and FIG. 6 is a natural circulation type open jacket according to the first embodiment of the present invention. It is principal part sectional drawing of the tank apparatus provided with.

In the drawing, reference numeral 51 denotes a tank device; 52, a tank inner plate for containing a liquid; 53, a jacket plate disposed at a predetermined distance outside the tank inner plate 52; 52 and a jacket plate 53, a jacket 54 is formed.
It is a flow path open to the atmosphere for circulating a medium such as a heat medium. In this case, the jacket plate 53 extends from a lower end of the tank inner plate 52 to a predetermined height position above, and an upper end portion of the tank inner plate 52 is exposed.

A liquid supply / drain port 58 is formed at a predetermined height position below the tank inner plate 52, for example, at the lower end.
2 can be supplied in the direction of the arrow or discharged from the tank inner plate 52 in the direction of the arrow. Also, a predetermined height position above the jacket plate 53, for example,
A medium supply port 56 is formed at the upper end, and a predetermined height position below the jacket plate 53, for example, a medium discharge port 57 is formed at the lower end, and the medium is supplied to the jacket 54 through the medium supply port 56 in the arrow direction. It can be supplied or discharged from the jacket 54 through the medium discharge port 57 in the direction of the arrow. In addition, at the upper end of the jacket 54, an injection nozzle 63 formed of an annular tube and having an injection port (not shown) formed at a plurality of positions in the circumferential direction is disposed, and the injection nozzle 63, the medium supply port 56, Is connected. Further, the injection port is formed so that its axis is inclined toward the tank inner plate 52 so that the medium can be jetted in the direction of the arrow toward the tank inner plate 52.

In this case, since the jacket 54 is open to the atmosphere, the pressure in the jacket 54 becomes approximately atmospheric pressure. Therefore, the reinforcing plate as shown in FIG. Then, the medium supplied to the jacket 54 via the medium supply port 56 naturally falls along the surface of the tank inner plate 52 in the jacket 54 and is stored in a lower part.

An overflow port 61 is formed at a predetermined height on the jacket plate 53 between the medium supply port 56 and the medium discharge port 57, and the jacket 5
4, a medium reservoir 64 below the overflow port 61.
Is formed. When the medium stored in the medium storage 64 is discharged through the medium discharge port 57, the medium is controlled by the pump 62 as a medium flow control unit toward the medium supply port 56 through a heat exchanger (not shown) in the direction indicated by an arrow. To be pumped. The pump 62 is selectively driven by a control device (not shown).

To this end, the lower limit level L _L is above the lower end of the jacket 54 by a predetermined distance.
Upper limit level L _H above predetermined distance d from _L are respectively set, a pair of level sensors (not shown) as a level detecting means to the lower limit level L _L and the upper limit level L _H is disposed, the upper limit level L _H The overflow port 61 is formed above a predetermined distance. The level of the medium in the jacket 54 is detected by each of the level sensors.

In this case, the drive control means of the control device drives the pump 62 in accordance with the level of the medium detected by the level sensor. For example, when the level of the medium becomes lower than the lower limit level L _L , the driving of the pump 62 is stopped. Accordingly, the medium outlet 5
When the level of the medium detected by the level sensor becomes _{equal to} or higher than the upper limit level LH, the pump 62 is driven again. Therefore, it is possible to maintain the level of the medium in the jacket 54 between the lower limit level L _L and the upper limit level L _H. Further, when the level of the medium exceeds the upper limit level L _H prescribed above, the medium in the jacket 54 is discharged through the overflow opening 61. In the present embodiment, the pump 62 is selectively driven in accordance with the level of the medium detected by the level sensor, but the discharge capacity of the pump 62 is changed in accordance with the level of the medium. It can be changed.

As described above, since the level of the medium in the jacket 54 can be maintained between the lower limit level L _L and the upper limit level L _H , the medium reservoir 64 always contains a predetermined amount of medium. Will be. Therefore, a desired amount of the medium is pumped to the medium supply port 56 by the pump 62,
It can be supplied to the jacket 54 stably.

In the tank device 51, since no reinforcing plate is used, the tank inner plate 52 and the jacket plate 53
And a temperature difference is generated between the tank inner plate 5 and the temperature difference.
Even if there is a difference in the amount of expansion and contraction between
No stress is generated at the joints with the tank inner plate 52 at various places. Therefore, since the joining portion is not damaged, the durability of the tank device 51 can be improved.

Since the collection tank is not required, the structure of the tank device 51 can be simplified and the cost can be reduced. Further, since a large space below the tank device 51 can be ensured, maintenance of peripheral devices can be easily performed. Moreover, not only is the floor on which the tank device 51 is installed easy to clean, but also sanitary.

As shown in FIG. 6, the jacket plate 53 has an upper end 53 opposed to the tank inner plate 52.
a, the end portion 53a is not fixed to the tank inner plate 52, and a slight gap (gap) δ is formed between the end portion 53a and the tank inner plate 52. Therefore, the jacket 54
The temperature difference between the tank inner plate 52 and the jacket plate 53 occurs as the medium is circulated through the medium, and the difference in the amount of expansion and contraction between the tank inner plate 52 and the jacket plate 53 occurs. The generation of stress at the joint portion with the tank inner plate 52 is further reduced. As a result, the joint portion is not damaged, so that the durability of the tank device 51 can be further improved.

Next, a second embodiment of the present invention will be described. In addition, about what has the same structure as 1st Embodiment, the description is abbreviate | omitted by attaching the same code | symbol.

FIG. 7 is a view showing a tank device having a natural circulation type open jacket according to a second embodiment of the present invention.

In the figure, reference numeral 71 denotes a tank device, and 73 denotes a jacket plate provided at a predetermined distance outside the tank inner plate 52. A jacket 74 is provided between the tank inner plate 52 and the jacket plate 73. Is formed, and the jacket 74 becomes a flow path open to the atmosphere for circulating a medium such as a refrigerant or a heat medium. In this case, the jacket plate 73 is extended from the lower end of the tank inner plate 52 and surrounds the upper end of the tank inner plate 52.

A medium supply port 76 is formed at the upper end of the jacket plate 73, and the medium can be supplied to the jacket 74 through the medium supply port 76. At the upper end of the jacket 74, an injection nozzle 84 made of an annular tube and having injection ports (not shown) formed at a plurality of positions in the circumferential direction is provided.
4 and the medium supply port 76 are connected.

The present invention is not limited to the above embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0041]

As described above in detail, according to the present invention, in a tank device, a tank inner plate for containing a liquid and a predetermined distance outside the tank inner plate are arranged. Between the tank inner plate, a jacket plate forming a jacket for circulating the medium, formed at a predetermined height position in the jacket plate, a medium supply port for supplying a medium to the jacket, A media outlet formed at a predetermined height position on the jacket plate for discharging the medium from the jacket; and an overflow port formed at a predetermined height position on the jacket plate for overflowing the medium from the jacket. A level detecting means for detecting a level of the medium in the jacket; and a medium flow control means for pressure-feeding the medium discharged from the medium discharge port. When, and a control device so as to correspond to the level of the medium in the jacket to drive the medium flow control means.

In this case, since a medium reservoir can be formed in the jacket, a collection tank becomes unnecessary. Therefore, not only can the structure of the tank device be simplified, but also the cost can be reduced. And since the space below the tank device can be widely secured, maintenance of the peripheral equipment can be easily performed. In addition, the floor on which the tank device is installed is not only easily cleaned, but also sanitary.

Further, since the level of the medium in the jacket can be maintained between the lower limit level and the upper limit level, a predetermined amount of medium is always stored in the jacket. Therefore, a desired amount of medium can be supplied to the jacket.

In another tank device of the present invention, the upper end of the jacket plate and the tank inner plate are not fixed.

In this case, since the reinforcing plate is not used, a temperature difference occurs between the tank inner plate and the jacket plate as the medium is circulated through the jacket, and the temperature difference causes the tank inner plate and the jacket plate to be separated from each other. Even if there is a difference in the amount of expansion and contraction between them, no stress is generated at the joints with the tank inner plate at various places. Therefore, since the joining portion is not damaged, the durability of the tank device can be improved.

Further, as the medium is circulated in the jacket, a temperature difference occurs between the tank inner plate and the jacket plate, and a difference in the amount of expansion and contraction occurs between the tank inner plate and the jacket plate. In addition, stress does not occur at the joints with the tank inner plate at various places. Therefore, since the joining portion is not damaged, the durability of the tank device can be further improved.

[Brief description of the drawings]

FIG. 1 is a view showing a tank device having a natural circulation type open jacket according to a first embodiment of the present invention.

FIG. 2 is a view showing a conventional tank device provided with a forced-circulation type spirally-sealed jacket.

FIG. 3 is a view showing a conventional tank apparatus provided with a dimple-type closed jacket of a forced circulation system.

FIG. 4 is a first view showing a conventional tank device provided with an open jacket of a natural circulation system.

FIG. 5 is a second view showing a conventional tank device provided with an open jacket of a natural circulation system.

FIG. 6 is a cross-sectional view of a main part of a tank device having a natural circulation type open jacket according to the first embodiment of the present invention.

FIG. 7 is a view showing a tank device having a natural circulation type open jacket according to a second embodiment of the present invention.

[Explanation of symbols]

 51, 71 Tank device 52 Tank inner plate 53, 73 Jacket plate 54, 74 Jacket 56, 76 Medium supply port 57 Medium discharge port 61 Overflow port 62 Pump δ Gap

Claims (2)

[Claims] 1. A tank inner plate for containing a liquid,
(B) a jacket plate that is disposed outside the tank inner plate at a predetermined distance and forms a jacket for circulating a medium between the tank inner plate and (c) a predetermined plate on the jacket plate. (D) a medium supply port formed at a predetermined height position on the jacket plate and configured to discharge a medium from the jacket; And (e)
Formed at a predetermined height position in the jacket plate,
An overflow port for causing a medium to overflow from the jacket; (f) level detecting means for detecting a level of the medium in the jacket; and (g) a medium flow control means for pressure-feeding the medium discharged from the medium discharge port. When,
(H) a control device for driving the medium flow control means in accordance with the level of the medium in the jacket. 2. The tank device according to claim 1, wherein the upper end of the jacket plate and the tank inner plate are not fixed.