JPS6335266Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spiral heat exchanger, and an object of the present invention is to enable easy air and drain removal when used in horizontal installation.

Conventionally, when performing heat exchange between two fluids, a spiral heat exchanger is used, which performs desired heat exchange through a partition wall between spiral channels through which one or both fluids flow. This type of heat exchanger consists of two metal plates wound together in a spiral shape with a space between them to form a flow path.The side edges of each plate are bent in alternating directions, and the bent ends are connected to the adjacent plate. The two channels are made completely independent by contact welding to the side surfaces of the plate, and the gasket, lining, and cover are sequentially abutted on both sides of the spirally wound plate to form an integral unit. Therefore, the desired heat exchange can be performed through the partition wall by allowing two fluids to exchange heat with each other to flow down into this heat exchanger. However, when this spiral heat exchanger is used vertically, the air sealed inside the heat exchanger is initially drained by the fluid circulation, that is, by gradually filling each flow path with fluid. The air that has entered the tank is pushed up by the fluid and is naturally exhausted from the air vent hole provided at the top, and the drain is also exhausted from the drain hole provided at the bottom. However, depending on the type of fluid, heat exchange method, etc., the heat exchanger may be used in a horizontally installed state. In the horizontal installation method, air is stored in each spiral part of the spiral flow path, and the fluid is
Air cannot be discharged unless the flow rate is at a high speed of 1.5 m/sec or more, and when used at a flow rate of 1.5 m/sec or less, it is impossible to completely discharge the air under highly viscous fluid. If air remains in each spiral flow path, that area becomes a dead space where heat exchange does not take place, reducing the efficiency of the heat exchanger. Not suitable. Similarly, the drain is not completely discharged, but remains trapped in each spiral flow path.

The present invention was developed in view of this, and is a heat exchanger in which metal plates are wound up in a spiral shape at a required interval to form two independent flow paths in a spiral shape. When the heat exchanger is placed horizontally at the end, a gasket with elongated air vent and drain slots arranged in a straight line is placed at the top and bottom of the hole to which the nozzle is connected, and this gasket is placed on the outside. The gist is that a cover is provided for the

The present invention will be explained below based on the illustrated embodiments.

In the figure, 1 and 2 are band-shaped metal plates for forming a spiral flow path, and the material may be stainless steel, titanium, Hastelloy, etc. depending on the application and the properties of the fluid.
Nickel, Monel, mild steel, etc. are appropriately selected and used, and distance pieces are protruded from one or both of the plates 1 or 2 at predetermined intervals, or by other methods, a predetermined flow path is formed between the two plates. The metal plates 1 and 2 are stacked at a certain interval and wound up in a spiral shape.The edges on both sides of the metal plates 1 and 2 are either bent to close the channel side ends, or they are spirally wound as shown in the figure. Covers 3 and 4 are brought into contact with both end surfaces of the mold, that is, two metal plates wound in a spiral shape, in order to separate each flow passage in a watertight manner.
By stacking the covers 3 and 4 and pressing the opposite covers 3 and 4, the side edges of the metal plates 1 and 2 are brought into strong pressure contact with the gasket 5, and one fluid is allowed to flow into or out of one cover. Nozzle 6
A nozzle 7 is provided on the other cover to allow the other fluid to flow in or out, respectively, and these nozzles 6 and 7 are brought into communication with the center side of each flow path A and B, and are connected to the outer periphery of each flow path A and B. Nozzles 8 and 9 are provided on the sides so that fluids flowing through channels A and B, respectively, flow in from one nozzle and flow out from the other.

The gasket 5 is disc-shaped as shown in FIG. 2, and has a hole 5 in the center for protruding the nozzle 6 or 7.
A is bored and an air vent slot 5b and a drain slot 5c are provided at the ends of the spiral channels A and B so as to be electrically conductive. And this slot 5
b and 5c are provided above and below in the vertical direction passing through the center of the gasket when the spiral heat exchanger is placed horizontally, and air vents provided at the top of the covers 3 and 4 are provided at the upper end of the slot 5b. The slot 5c is designed to be electrically conductive to a drain provided at the bottom of the cover.

Also, the gasket 5 is connected to the slot 5 as shown in FIG.
If b and 5c are straight, some of the fluids flowing down channels A and B may mix with each other, so if mixing of two fluids must be avoided, avoid mixing different fluids. A gasket having a structure as shown in FIG. 3 is used to allow air and drain to be removed. That is, in the figure, the gasket 5 is at least 2
The gaskets 5X are used in a stacked manner, and one gasket 5X is a perforated plate with one hole per turn for each turn of each channel A and B, and the other gasket 5Y is a perforated plate with slots. . The gasket 5X has an air vent hole and a drain hole above and below the hole 5a, respectively, on a straight line connecting the hole 5a of the center nozzle attachment part and the outer periphery, and in a substantially vertical direction when the heat exchanger is placed horizontally. perforate.
This is done by drilling hole rows a and b in a straight line so that each turn of channel A has one or two holes 5l and 5m, respectively, and a hole row in a straight line different from this hole row. Similarly, one or two holes 5n and 5o are drilled on each turn of the other channel B on c and a, respectively.
The flow paths A and B are formed independently by the staggered air vent holes and drain holes so as not to be electrically connected to each other, and the gasket Y is connected to the gasket 5.
The slot holes 5p, 5q, 5r, and 5s are provided in the same manner as shown in FIG. It is. Therefore, when these two gaskets are used in a stacked manner, each flow path is drained and air vented independently, and it is possible to prevent the fluids in both flow paths from being mixed with each other.

According to the present invention, when a heat exchanger is placed horizontally at one or both ends of two spiral channels formed through a partition wall, long hole-shaped air vents and drains are installed in the vertical direction. Since the gasket is in contact with the gasket provided with the groove, it has the advantage that the air and drain remaining in the conventional flow path can be reliably discharged.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway external view, and FIGS. 2 and 3 are front views of the gasket. 1, 2...metal plate, 3, 4...cover, 5...
Gasket, 6, 7, 8, 9... Nozzle, A, B
...Flow path.

Claims (1)

[Scope of utility model registration request] In a heat exchanger in which metal plates are wound in a spiral shape at required intervals to form two independent flow paths in a spiral shape, when the heat exchanger is placed horizontally at the end of the flow path. A spiral heat exchanger in which a gasket with elongated air vent and drain slots arranged in a straight line is in contact with the upper and lower parts of the hole to which the nozzle is connected, and a cover is provided on the outside of the gasket.