JPS60166024A - Closed type stirring device - Google Patents

Abstract

PURPOSE:To prevent leakage and scattering of reaction product from a reaction vessel by holding a stirring blade for stirring a reactant in a chemical reaction vessel freely rotatably and providing a sealing means for shielding an opening of a cover plate covering the opening part of a vessel from outside air. CONSTITUTION:An opening is bored at almost central part of a cover plate 24 for covering an opening part of a vessel 12 liquid tightly, and a stirring means 14 inserted into the vessel 12 through the opening is held freely rotatably to the vessel 12 by engaging shaft supporting means 20, 22 formed integrally with the means 14 freely pivotally to supporting means 30, 32 provided adjacently to said opening of the cover plate. Further, a driving means 42 is attached to an extended part of the stirring means 14 protruding to the outside of the vessel 12, and the stirring means is caused to rotate in the vessel by the driving means, and a flexible sealing means 40 for shielding the opening of the cover plate 24 from outside air is provided between the external surface of the cover plate and the stirring means. As the result, scattering and leakage of the reaction product from the reaction vessel are completely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention generally relates to a stirring device, and more particularly, to a stirring device for rotatably holding and driving stirring blades for stirring reactants in a chemical reaction vessel, and for stirring blades for stirring reactants in a chemical reaction vessel. This invention relates to a closed type stirring device designed to prevent leakage and scattering of reactants. Furthermore, the closed stirring apparatus according to the present invention is suitable for stirring highly viscous reactants, particularly under high temperature conditions.

Conventionally, various types of stirring devices have been used in chemical reaction containers to stir the reactants within the container, and the principle of such stirring devices is as shown in FIG. 1. That is, the stirring blade 2 is provided inside the reaction vessel 1, the stirring blade drive shaft 4 protrudes outside the reaction vessel, is connected to the drive motor M, and the stirring blade 2 is rotated by energizing the drive motor M. The structure was such that the reactant R in the container was stirred. or,
If it is desired to prevent the reactant R in the reaction container 1 from scattering or leaking out of the container as much as possible, a removable lid 6 can be attached to the reaction container 1 as schematically shown in FIG. The stirring blade drive shaft 4 was inserted through the lid 6. Normally, the stirring blade drive shaft 4 is supported by a bearing 8 attached to the lid 6, but in this configuration, the stirring blade drive shaft 4 is supported by a bearing 8 via the bearing 8. @R leakage occurred and it is still not sufficient. In order to compensate for such drawbacks, various shaft sealing devices are attached to the bearing 8, but shaft sealing devices such as seals or puffing devices not only increase the load on the drive motor but also reduce the sliding of the rotating shaft and the seal. There were also problems in terms of leakage of reactants and the lifespan of the device. For this reason, mechanical seals have recently been used as shaft sealing devices, which has greatly reduced the problem of leakage, but has the problem of being complicated in structure and difficult to operate and maintain.

In addition, in some cases, the reaction vessel, etc. may be required to have no leakage, to be able to be used under high temperature conditions, to have a shaft sealing device,
In particular, when mechanical seals are used, extremely strict usage conditions and specifications are required, such as ensuring that the sealing liquid does not leak into the reaction vessel, but it is impossible for current shaft seal devices to satisfy all of these requirements. Possible or extremely difficult.

Therefore, the present invention provides a closed type stirring apparatus which solves the drawbacks of the conventional stirring apparatus described above, has an extremely simple structure, and can completely prevent scattering and leakage of reactants from a reaction vessel. Another object of the present invention is to provide a rotatable stirring blade that does not significantly increase the driving force, is durable and therefore reliable, and minimizes the need for maintenance. Another object of the present invention is to provide a closed stirring device that can be driven.

Another object of the present invention is to provide a closed type stirring apparatus which can stir very effectively under high temperature conditions and even when reactants have high viscosity.

Next, the i-closed stirring device according to the present invention will be explained in detail with reference to the drawings.

Referring to FIG. 6, a closed stirring device 10 according to the present invention
One embodiment of is illustrated. In this embodiment, a case where the closed stirring device 10 is applied to a chemical reaction container 12 will be described.

The closed stirring device 10 is inserted into the reaction vessel 12,
A stirring means 14 is provided for stirring the reactants in the reaction vessel. The stirring means 14 consists of an elongated shaft 16, with one end 1
6g is placed inside the reaction vessel, and the other end 16b protrudes outside the reaction vessel.

Stirring means 16 are preferably provided at the end 16a within the reaction vessel.
In order to facilitate the stirring action, a plurality of annular protrusions 18 are formed as shown.

Further, such annular projection 1B can also be configured in a spiral shape,
Alternatively, it could also be a plurality of blades.

The intermediate portion of the shaft 16 is provided with bearing means, for example in the form of annular projections 20 and 22 spaced a predetermined distance apart. The annular protrusions 20 and 22 can be formed integrally with the shaft 16, but alternatively, the annular discs are formed separately and can be brazed, screwed, etc. at arbitrary positions on the shaft 16 depending on the location. It can also be fixed to the shaft 16 with. The bearing means are not limited to the shapes described above, but could take various forms.

A lid plate 24 is disposed above the opening of the reaction vessel 12, and is detachably fixed to the flange 26 of the reaction vessel 12 in a sealed manner, for example, with bolts (not shown). Lid plate 24
An opening 2 through which the shaft 16 of the stirring means 14 passes is provided in the center of the
8 is formed.

Furthermore, a pair of support plates 3a1fC and 62 are disposed on the side of the lid plate 24 facing the inside of the reaction vessel 12, that is, on the inner surface, so as to face each other in the diametrical direction of the opening 2B (see also FIG. 4). ), are attached to the inner surface of the cover plate 24 with screws 34 and 36. Opposing ends 50a of each support plate 3o and 32
, l and 52* are formed in an arc shape and positioned around the outer periphery of the shaft 16. The imaginary diameter defined by the end arcuate surfaces 30a and 52a of the support plates 30 and 32 is greater than the outer diameter of the shaft 16, but smaller than the outer diameter of the annular projections 20 and 22. Also, as illustrated,
At least the arcuate ends 30a and 52 steps of the support plates 30B and 32 are disposed between the annular protrusions 20 and 22 of the shaft 16, and therefore the thickness of the arcuate ends is smaller than the distance between the protrusions 20 and 22. l) to be cut.

With the above configuration, the stirring means 14 includes the annular projections 20 and 22 of the shaft 16 and the support plate 6 provided on the cover plate 24.
It will be appreciated that the lid plate 24, ie, the reaction vessel 12, is rotatably supported by 0 and 52.

Additionally, flexible sealing means, such as a bellows 40, are arranged over a portion of the outwardly projecting portion 16b of the shaft 16. One end 40m of the bellows 40 has an opening 2B on the outer surface of the cover plate 24.
The other end 40b is attached to the shaft 16 in a sealed manner surrounding the shaft 16.
It is also attached in a sealed manner to a flange 16c provided integrally with the flange 16c. With this configuration, the interior of the reaction vessel 12 is completely isolated from the outside air, ie, the outside atmosphere. The bellows 40 can be made of various materials, such as synthetic rubber, and its form is not limited to that shown.

The tip i6d of the extension of the shaft 16 that protrudes further outward from the flexible sealing means 40 is pivotally connected to a drive plate 42 provided on the drive shaft of the drive motor M. That is, the shaft 16
The tip 16d of the hole 4 is eccentrically arranged in the drive plate 42.
2a, it is pivotally attached. At this time, the rotation axes of the drive motor M and the drive plate 42 approximately coincide with the longitudinal axis of the reaction vessel 11, and the annular projection 2a of the shaft 16
and 22 are coincident with the longitudinal axis of the reaction vessel 12. In other words, the annular protrusions 20 and 22, which are supporting portions of the stirring means 140 and the reaction vessel 12, are located on the rotation axis of the drive motor M7 and the drive plate 42.

It will therefore be appreciated that the longitudinal axis of the stirring means 14, ie the shaft 16, is inclined at an angle θ with respect to the longitudinal axis of the reaction vessel 12, as shown in FIG. This inclination angle θ can be adjusted by forming a plurality of holes 41 in the drive plate 42 and selecting and using appropriate holes 41.

In the above configuration, when the drive motor M is energized, the stirring means 14, i.e. the shaft 16, pivots about the annular protrusions 20 and 22, which are pivotally supported by the support plates 50 and 32. Misosuri) Exercise. By interlocking the rotation of the stirring means 14, the reactants in the reaction vessel will be suitably stirred. Furthermore, since the stirring means 14 is firmly held in the reaction vessel by the engagement of the support plates 50 and 32 and the annular protrusions 20 and 22, the stirring means 14 can sufficiently stir the reactant even if the viscosity of the reactant is high. can do. Furthermore, in the present invention, as described above, in the stirring means, the entire shaft 16 protruding into the reaction vessel from the annular protrusions 20 and 22 rotates in conjunction with each other, as shown in FIGS. 1 and 2. The stirring effect is considerably superior compared to the conventional stirring device which performs the stirring action only by the rotating blades.In addition, in the stirring device according to the present invention, the upper opening of the reaction vessel 12 is It is closed by the lid plate 24, and the central opening 28 of the lid plate 24 is isolated from the outside air by a flexible sealing means 40, so that even if the reaction vessel 12 is vigorously stirred, the reactants will not escape from the reaction vessel. No scattering or leakage.

Furthermore, the shaft 16 of the stirring means 14 is supported by the engagement of the support plates 50 and 62 and the annular projections 20 and 22 as described above, in other words, the dry bearing method is used in the present invention. This solves the problem of leakage of sealing liquid from the bearing into the reaction vessel. Further, in the present invention, the support plates 30 and 32 are made of a material having excellent bearing properties such as chemical resistance and heat resistance, such as Teflon (trademark).
A good bearing can be provided by making the bearing from a resin such as, and therefore, it has the advantage of not requiring special lubricating oil and being able to operate even under high temperature conditions.

Since the closed stirring device according to the present invention is configured as described above, when it is applied to a reaction container or other container', the reactant in the container may scatter out of the container during stirring operation. This has the effect of completely preventing leakage. The device also has the advantages of simple structure, high durability and reliability, and low maintenance requirements.

Furthermore, the present apparatus can very effectively achieve stirring of highly viscous reactants under high temperature conditions.

[Brief explanation of the drawing]

1 and 2 are schematic diagrams of conventional stirring devices. FIG. 3 is a schematic vertical sectional view showing one embodiment of the closed stirring device according to the present invention. FIG. 4 is a cross-sectional view of the group taken along the line rule of FIG. 6. Support plate 40; Flexible sealing means 42: Drive plate 36 Fourth eye

Claims (1)

[Claims] 1) Providing a lid plate for covering the opening of the container in a liquid-tight manner,
An opening is formed in the lid plate approximately in the center, and a stirring means is inserted into the container through the opening. The stirring means is rotatably held relative to the container by pivotably engaging bearing means integrally formed with the stirring means with support means disposed adjacent to the lid opening; An extension portion of the stirring means protruding outside the container is attached to a driving means, and the driving means causes the stirring means to make a rotational movement within the container, and further, for blocking the opening of the lid plate from outside air. A closed type stirring device characterized in that a flexible sealing means is disposed between the outer surface of the lid plate and the stirring means. 2) The stirring means is an elongated shaft, the bearing means is composed of a pair of annular protrusions integrally formed on the shaft and spaced apart by a predetermined distance, and the support means is composed of a pair of annular protrusions whose tips are attached to the pair of annular protrusions. The device according to claim 1, which is a pair of support plates positioned between the annular protrusions. 3) A flexible sealing means surrounds a portion of the shaft extension projecting outwardly from the annular projection, and has one end attached around the opening in the lid plate and the other end to the shaft extension. 3. The device of claim 2, wherein the device is a generally cylindrical bellows secured at any location on the extension.