JPS6242729A - Fluid agitator - Google Patents

Abstract

PURPOSE:To easily agitate a fluid at elevated pressures and temps. by composing the titled agitator of a liq. feeder to supply the fluid for rotating a turbine blade, a gear for transmitting the rotation of the turbine blade and an agitating body connected to the rotation transmitting gear. CONSTITUTION:A turbine blade 2 free to horizontally rotate is mounted in a turbine chamber 1. A small-bore spray nozzle 3 to supply a fluid for rotating the turbine blade 2 is provided to the turbine chamber 1. The spray nozzle 30 is furnished to the side periphery of the turbine chamber 1 and connected to an introduction 32 through a through-hole 31 piercing through the main body A. A discharge port 35 is formed on the bottom surface of the turbine chamber 1 and connected to a discharge pipe 36. The pipe 36 is pierced through the wall of a vessel X and communicated with the outside of the vessel. The fluid is discharged from the pipe 36 through a control valve 37.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for stirring a fluid such as gas or liquid in a closed container.

<Prior Art> It is often necessary to stir a fluid under increased or reduced pressure or at high temperature.

Examples include reaction tanks used in composite material production, autoclaves, rubber vulcanizate heat treatment tanks, electric furnaces, heat treatment furnaces, culture tanks, and the like.

This is to quickly equalize the distribution of temperature and humidity in closed containers such as tanks and furnaces.

Stirring is performed to promote the reaction of the reaction fluid.

This stirring device is usually equipped with a power source such as an electric motor outside the closed container, and is configured so that a rotating shaft passes through the container and a stirring blade or the like is attached inside the container to perform stirring.

<Problems to be Solved by the Invention> However, in the conventional stirring device described above, since the rotating shaft penetrates the container, there is a problem in that the rotating shaft of the penetrating portion must be sealed. This sealing is usually achieved by a shaft sealing device such as a mechanical seal, labyrinth seal, oil seal, or gland packing, but as is well known, these shaft sealing devices cannot always completely prevent leakage.

In particular, when the inside of the sealed container is at high temperature and pressure, or when the stirring blade rotates quickly, the sealing performance cannot be maintained sufficiently, resulting in a problem that the reliability of the apparatus is significantly reduced.

Also when using a double mechanical seal.

There have also been accidents where the lubricating and cooling oil in the P3 leaked out and came into contact with the high temperature, high pressure fluid in the container and spontaneously ignited.

For this reason, in the past, even when stirring was required, sufficient stirring was not performed, and although it is advantageous to perform stirring in a high-temperature, cavity-pressure steam curing can for lightweight cellular concrete, in reality, it is not possible to stir There were many areas where internal stirring operations were not performed.

Therefore, if a device that can reliably stir without leaking 1 m or causing fire accidents under conditions such as high temperature and high pressure can be developed, it can be said to have extremely great industrial applicability.

Means for Solving the Problems> The present invention has been made based on the above-mentioned viewpoints, and there is no need to penetrate the rotating shaft into the agitated fluid closed container, and stirring can be reliably performed even in high temperature and high pressure closed containers. The object of the present invention is to provide a stirring device that obtains the desired results.

The stirring device of the present invention first has a turbine chamber installed in a sealed container of a fluid to be stirred, such as gas or liquid. Here, the turbine chamber does not have to be a completely sealed space, and there is no need for leakage to an extent that is permissible with current technology; It is desirable to minimize the outflow to the

The turbine chamber is equipped with a turbine blade, and a fluid supply device is provided for introducing fluid into the turbine chamber from outside the container to rotate the turbine blade. The fluid used to rotate the turbine blades may be discharged to the outside of the closed container by providing an appropriate discharge device, or may be allowed to leak into the closed container if there is no problem. The turbine blades are connected to a rotation transmission device that transmits this rotation to the outside of the turbine room,
A stirring body such as a stirring blade is connected to the transmission device outside the turbine room.

As the fluid for rotationally driving the turbine blades, air, an inert gas such as N2, Ar, etc., or a gas or liquid such as steam can be used.

This fluid for driving the rotation of the turbine blades may be supplied completely separately, but in some cases, gas or steam may be used to pressurize and heat the closed container. In other words, these gases and steam are normally reduced to a specified value from a high-pressure source tank through a pressure reducing valve, but they are directly introduced into the turbine chamber from the high-pressure source tank without going through this pressure reducing valve to drive the turbine blade rotation. It is also possible to provide The discharged portion after being subjected to rotational driving may be leaked into a closed container and used for pressurization and heating, or may be taken out of the system and used for separate pressurization and heating. With this configuration, driving costs can be reduced.

Function> In the above configuration, when fluid is supplied into the turbine chamber from outside the container and the turbine blades are rotated, this rotation is transmitted to the stirring body by the rotation transmission device, causing the stirring body to rotate.

As a result, the fluid to be stirred in the closed container is stirred.

In addition, since there is no need to penetrate the container with a rotating shaft, there is no need to take precautions such as shaft sealing, and there is no risk of leakage even when the inside of the container is high temperature or pressure, or the stirring body rotation speed is high, ensuring reliable stirring. It can be performed.

<Example> An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, a main body (A) of a stirring device according to the present invention is placed in a closed container (X) for a fluid to be stirred. This main body (A) has a cylindrical shape.

The lower half is a turbine chamber (1), and the upper half is a rotation space for a stirring blade (5), which will be described later.

A turbine i (2) is installed in the turbine chamber (11) so as to be horizontally rotatable. Also, this turbine room (
1) is provided with a small-diameter jet nozzle (7) for supplying fluid for rotating the turbine blade (2). This ejection nozzle (g) is provided on the side periphery of the turbine chamber (1), and passes through the main body (rA) 9 through the through hole (3).
1) Connected to the introduction pipe (32) via yi. The introduction pipe (32) penetrates the wall of the container (X) and leads out of the container, and is connected to a fluid source (not shown) through a control valve (33) and a compressor, blower, pump, etc. (34)'P. It is connected.

The control valve (33) is controlled by a pressure control device (7) which will be described later. These nozzles (g).

Conduction hole (31), introduction pipe (32), control valve (3
3), a fluid supply device (with a pump etc. (34) and a fluid source)
3).

Further, in this embodiment, the fluid used for the rotation of the turbine blades (2) is discharged from the turbine chamber (1) to the outside of the container (X). That is, a discharge hole (35) is formed in the bottom of the turbine chamber (1), to which a discharge pipe (36) is connected, and this pipe (36) penetrates the wall of the container (X) and exits the container. The control valve (37) is also controlled by a control device (7), which will be described later.

The inlet pipe (32) and the outlet pipe (36) through the container (X)M are easily sealed because these pipes do not rotate like shafts.

Moreover, no leakage occurs.

The turbine blade (2) is rotatably supported by a rotating shaft (4). This rotating shaft (4) passes through the turbine chamber (1) at the top and bottom, and bears bearings (61() at the top and bottom ends of the main body (A).
It is supported by 61. Bearing/shaft seal devices (4o) (40) are formed in the upper and lower rotating shaft penetration parts of the turbine chamber (1) to improve the sealing performance of the turbine chamber (1). Bearing and shaft sealing device (any suitable device can be used as 4)
This embodiment uses a bushing type labyrinth seal. In this case, if the temperature inside the closed container is high.

It is desirable to use a material with solid lubricity such as carbon or ceramic.

A stirring blade (5) is attached to the upper end of the rotating shaft (4), and transmits the rotation of the turbine blade (2) to the stirring blade (5).

That is, the rotating shaft (4) serves as a rotation transmission device that directly transmits the rotation of the turbine blade (2). The stirring blade (5) is configured to rotate horizontally in the rotation space (50) in the upper half of the main body (A). An inlet (51) for flowing the fluid to be stirred into the rotating space (50) is formed on the upper end surface of the main body (A), and an outlet (52) is formed on the side periphery of the upper half.
) is formed, and the rotation of the stirring blade (5) produces a flow in the direction of the arrow, and this flow K stirs the fluid to be stirred in the closed container. The position, size, quantity, etc. of the inlet (51) and outlet (52) may be appropriately determined depending on the required stirring flow rate, the position of the main body (A) in the container (X), etc.

Note that various materials can be used for the turbine blade (2), the bearing/shaft sealing device (40), etc.

In this embodiment, carbon material is used. When carbon material is used, the turbine blade can be made lightweight, and the bearing/shaft seal device can be an oil-free bearing. Similar effects can be obtained using materials other than carbon materials, such as organic materials, inorganic materials, metal materials, or composite materials thereof, which are lightweight and have oil-free lubricity.

In addition, when the fluid to be stirred is a liquid, the fluid that turns the turbine is gaseous, and the fluid that rotates the turbine is made to leak into the fluid to be stirred in the shaft sealing device (actively from the container C In addition to the stirring by the blades (5), the structure may be such that stirring is performed by gas bubbles.

The pressure p1. P2. A pressure measuring device (70X 71X 72) is provided for measuring p3 and the pressure value P1 % P! % P3 is the pressure control device (
7), where control valves (33) (37)
'e is controlled so that h P1 = pg + ΔP. This ΔP is approximately several atmospheres.

It can be determined according to the required rotational speed of the turbine blades1゜Also, P2 and P3 are controlled to almost the same pressure, and the agitated fluid flows in through the turbine chamber (1) K bearing/shaft seal device (40), and vice versa. The rotational drive fluid is in a closed container (X)
Make sure it doesn't leak inside.

Next, the bearing (6) will be explained based on the enlarged view shown in FIG.

Here, a conventional general pivot bearing is not used, but a specially constructed bearing is used that requires no lubrication and can withstand high heat and high rotation. That is, a plurality of balls (61) are placed on the saucer (60) as shown in FIGS. 3 and 4, and a single ball (61') is placed on top of the ball (61).
61') is fitted into a bowl-shaped groove (41) formed at the tip of the rotating shaft (4) to support the shaft (4). As the material for Bono p61), it is desirable to use materials with high contact resistance and wear resistance such as carbon%SiC, cemented carbide, sapphire, and ceramics, which do not require lubricating oil, depending on the properties and temperature of the fluid to be stirred. .

The number of balls (61) and the number of stacked stages can be increased or decreased as appropriate.5 For example, as shown in Fig.
0) 4 balls (60), each saucer (60) has a plurality of balls (6
1) It is also possible to configure three stages by interposing one ball (61') between every nine balls.

Note that the lower saucer (60) is supported by a spring (62) and is movable in the vertical direction, and has a structure capable of absorbing thermal expansion of the one-rotation shaft (4), etc.

According to the bearing having the above structure, the amount of sliding of the balls (61) is reduced compared to conventional pivot bearings, so that no oil is required and wear is reduced. Therefore, it can maintain a high pv value even in a high-temperature atmosphere or in a liquid, and can withstand high-speed rotation of the rotating shaft (4 inches).

In the above configuration, when fluid such as air is sent from the fluid supply device (3), the turbine (2) rotates, and the stirring blade (5) rotates accordingly. As a result, a flow is generated in the fluid to be stirred, and stirring is performed.

In addition, with this configuration, there is no need for the rotating shaft or the like to penetrate the container ('X), so that leakage from the closed container to the outside of the machine does not occur.

<Effects of the Invention> As explained above, the stirring device of the present invention has the effect of being able to perform reliable stirring regardless of environmental conditions without causing leakage to the outside of the closed container.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of the stirring device of the present invention;
FIG. 2 is an enlarged sectional view of the bearing part, FIGS. 3 and 4 are arrangement diagrams of balls, and FIG. 5 is an enlarged sectional view showing another example of the bearing. (11...Turbine chamber, (2...Turbine blade, (
3)...Fluid supply device, (4)...Rotating shaft, (5)
... Stirring blade, (6) ... Bearing, ke) ... Pressure control device! .

Claims (1)

[Claims] a turbine chamber installed in an agitated fluid sealed container; a turbine blade provided in the turbine chamber; a fluid supply device that supplies fluid for rotating the turbine blade into the turbine chamber from outside the container; A fluid stirring device comprising: a rotation transmission device that transmits the rotation of a turbine blade to the outside of the turbine room; and an agitation body connected to the rotation transmission device outside the turbine room.