JPS6134031Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a vacuum stirring deaerator, in particular, the vacuum tank can be easily separated into an upper tank and a lower tank, making cleaning and inspection inside the tank easy, and increasing the operating rate. The present invention relates to a vacuum stirring defoaming machine that can be used.

BACKGROUND ART Conventionally, as a device for removing air bubbles contained in a viscous liquid, a defoaming machine as shown in FIG. 1, for example, has been proposed.

This deaerator has a cylindrical lifting pipe 7 in a vacuum tank 1.
An umbrella-shaped liquid flow plate 8 is fixed to the upper end of the liquid lift pipe 7, and a screw pump 1 is installed in the liquid lift pipe 7.
1 is provided to raise the liquid in the liquid lifting tube 7, and to cause the liquid to flow in a thin film form on the flow liquid plate 8, thereby sucking out air bubbles in the liquid and defoaming.

However, in such a conventional deaerator, since the vacuum tank 1 and the liquid pumping pipe 7 are integrally constructed, it is extremely inconvenient to clean and inspect the inside of the tank.For example, when changing the color of the synthetic resin, There were drawbacks such as color transfer and changing the color tone of the product resin.

Therefore, the present invention solves these conventional drawbacks, and the vacuum tank can be easily separated into an upper and a lower tank, so inspection and cleaning are easy.
The combination of a plurality of lower tanks and one upper tank has the advantage that the operating rate of the deaerator can be increased.

In other words, the present invention includes a vacuum chamber, a cylindrical liquid lifting tube installed vertically within the vacuum chamber, and a flowing liquid that is fixed to the upper end of the liquid lifting tube and spreads out in an umbrella shape toward the side wall of the vacuum chamber. In a vacuum stirring deaerator consisting of a plate, the vacuum chamber is divided into two parts: an upper tank having a large-diameter upper flange on the lower periphery, and a lower tank having a lower flange with a smaller diameter than the upper flange on the upper periphery.
The upper tank is installed on the machine frame via a bracket protruding from the middle of the outer peripheral surface of the upper tank,
A group of bolts formed between the upper flange and the lower flange and passing through the three flanges via an intermediate flange having the same diameter as the upper flange, which is formed on the periphery of a support member for supporting the liquid pumping pipe. This vacuum stirring deaerator is characterized in that it is fastened together with a group of bolts that penetrate only two flanges.

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

Fig. 2 is a sectional view of the vacuum stirring deaerator of the present invention, and Fig. 3 is a plan view taken along the line A-A. 1A and a lower tank 1B having a lower flange 6 on the upper periphery, the upper tank 1A has a bracket 2 protruding from its outside, and this bracket 2 is connected to the machine frame, that is, a channel provided on the periphery of the upper tank 1A. 3 and legs 4.
A cylindrical liquid lift pipe 7 is installed vertically in the vacuum chamber 1, and both upper and lower ends of the liquid lift pipe 7 are open, and an umbrella-shaped liquid flow plate 8 is fixed to the upper end. , the lower end is located above the bottom of the vacuum chamber 1. Further, the liquid lift pipe 7 is connected to the intermediate flange 10 via the support member 9.
The intermediate flange 10 is fastened between the upper flange 5 and the lower flange 6. The liquid flow plate 8 is inclined from the center to the periphery, and it is preferable that the periphery extends close to the inner wall of the vacuum chamber 1.

On the other hand, there is a screw pump 11 in the liquid lift pipe 7.
is provided, and by rotating the motor 12, the liquid can rise in the liquid lift pipe 7.

Also, at the tip of the screw pump 11 is a vacuum chamber 1.
It is preferable to provide an agitation blade 13 along the bottom surface of the liquid, and as the motor 12 rotates, the agitation blade 113 rotates to scrape the bottom, promoting agitation of the liquid.

The mixing and defoaming machine of the present invention basically includes the above-mentioned vacuum tank 1, liquid pumping pipe 7, support member 9, intermediate flange 10,
Although it is composed of a liquid flow plate 8 and a screw pump 11, preferably a stirring blade 13 is provided as in this embodiment, and the vacuum chamber 1 is further provided with a jacket 14 for heat retention or cooling, and a liquid pumping pipe 7. A jacket 15 is provided on the flow plate 8. The heat retaining medium in the jacket 14 enters through an inlet 16 and exits to an outlet 17, and in the jacket 15 it enters through an inlet 18 and exits to an outlet 19.

Next, an example of the fastened state of the flange in the present invention will be explained based on FIGS. 4 and 5. Fourth
The figure is a partially enlarged sectional view of the vicinity of the lower part of the bracket 2 according to the present invention, and FIG. 5 is a plan view thereof. During foam operation, the first bolt group 20 is fastened. However, the first bolt group 20 may be omitted.

On the other hand, the lower flange 6 is a flange having a smaller diameter than the upper flange 5 or the intermediate flange 10, and is connected to the upper flange 5 with the intermediate flange 10 interposed.
are fastened to each other by a second group of bolts 21.
By making the upper flange 5, intermediate flange 10, and lower flange 6 into such a structure, the upper flange 5 can be removed before removing the second bolt group 21.
If the intermediate flange 10 is fixed with the first bolt group 20, only the lower tank 1B can be removed. In addition, the upper flange 5 and the intermediate flange 1
0 may be provided with a corresponding bolt hole, or the upper flange 5 may be provided with a long hole 20A.
6 and 7 show a second structural example near the bottom of the bracket 2, with FIG. 5 being a partially enlarged sectional view and FIG. 6 being a plan view thereof.

As is clear from these figures, the upper flange 5
and a rectangular protrusion 22 on the intermediate flange 10;
23 are formed respectively, and these rectangular protrusions 22 and 23 are fastened by a first group of bolts 20. On the other hand, the lower flange 6 does not have such a rectangular protrusion, and is fixed together with the upper flange 5 and the intermediate flange 10 by the second group of bolts 21.

The flange structure shown in FIGS. 5 and 6 also makes it possible to separate only the lower tank 1B. Alternatively, in place of the bolts 20 in FIGS. 4 to 7, the upper flange 5 and the intermediate flange 10 may be held in a vise or a U-shaped member, or may be fixed by operating a handle. In short, in the present invention, the upper flange 5, the intermediate flange 10, and the lower flange 6 are fastened together under normal operating conditions, and only when the lower tank 1B is removed, the upper flange 5, the middle flange 10, and the lower flange 6 are 5 and the intermediate flange 10 are fastened together.

Next, the functions of the vacuum stirring deaerator of the present invention will be explained based on FIG. 2. A high viscosity liquid to be degassed or a powder and liquid to be mixed are introduced from the raw material supply port 24, and the motor 12 is rotated while heating or cooling the jackets 14 and 15 by passing steam or cold salt water thereinto. The contents are stirred by the stirring blade 13, raised in the liquid lifting pipe 7 by the screw pump 11, and flowed down from the upper end on the surface of the liquid flow plate 8 in the form of a thin film. Since the inside of the vacuum chamber 1 is reduced in pressure from the pressure reduction port 25, air bubbles in the thin film liquid flowing on the liquid flow plate 8 are destroyed and defoaming is performed. Liquid flow plate 8
The liquid flowing down from the edge of the liquid flow plate 8 quietly flows down the inner wall of the vacuum chamber. Once the mixing and defoaming is complete, release the vacuum, open the valve 26,
The contents are collected from the outlet 27.

After completing one batch of operations in this way, the second bolt group 21 (FIG. 4) is removed to separate the lower tank 1B from the upper tank 1A. As mentioned above, the liquid lift pipe 7 is supported by the intermediate flange 10 via the support member 9, and the screw pump 11 is supported by the upper tank 1A, so that it will not fall. Next, a second lower tank prepared in advance and filled with the high viscosity liquid to be defoamed is fixed with the second bolt group 21 in place of the previously removed lower tank 1B, and the defoaming operation described above is repeated. During this operation, the next high viscosity liquid to be degassed is charged into the lower tank 1B which was previously removed. If a high viscosity liquid to be degassed with a different color tone is to be charged, first clean the inside of the vacuum chamber 1 with a solvent, for example, with the lower tank 1B attached, and then remove the lower tank 1B and thoroughly clean the contaminated area. Wash.

According to the present invention, the upper flange and the intermediate flange of the vacuum chamber can be fastened together and only the lower chamber can be separated, making inspection and cleaning inside the vacuum chamber extremely easy. Conventional deaerators have a one-piece structure and no consideration was given to dividing the tank, which often caused problems in inspecting and cleaning the inside of the tank, but this invention easily solves these problems. can do. Particularly when treating objects to be defoamed with different color tones, if cleaning is insufficient, the color of the previously treated object to be defoamed will transfer to the object to be degassed next, ie, so-called color transfer.

However, with the present invention, the upper tank and lower tank can be separated, so parts such as the inside of the pumping pipe where defoamed substances tend to remain can be thoroughly cleaned while visually checking, and color transfer can be prevented. . Further, according to the present invention, it is possible to combine a plurality of lower tanks with one upper tank. For example, during a defoaming operation using the first lower tank, the material to be degassed is charged into the second lower tank. , further after degassing treatment from the third lower tank,
For example, it is now possible to inject resin into molds,
Therefore, the operating rate of the defoaming machine can be significantly improved.

Furthermore, according to the present invention, since the liquid lift pipe is supported by the support member, the liquid lift pipe can be clearly positioned, and the support member is also used as a passage for the heating and cooling medium. be able to.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an outline of a conventional defoaming machine, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 3 is a plan view of the A-A arrow, and Fig. 4 is a flange in the present invention. FIG. 5 is a partially enlarged cross-sectional view showing one example of the structure of the flange portion, FIG. 5 is a plan view thereof, FIG. 6 is a partially enlarged cross-sectional view showing another example of the structure of the flange portion, and FIG. 7 is a plan view thereof. 1...Vacuum tank, 1A...Upper tank, 1B...Lower tank, 2...Bracket, 5...Upper flange, 6
... lower flange, 7 ... liquid lift pipe, 8 ... liquid flow plate, 9 ... support member, 10 ... middle flange, 2
0...first bolt group, 21...second bolt group.

Claims (1)

[Scope of utility model registration request] A vacuum consisting of a vacuum chamber, a cylindrical liquid lifting tube installed vertically within the vacuum chamber, and a liquid flow plate fixed to the upper end of the liquid lifting tube and spreading out in an umbrella shape toward the side wall of the vacuum chamber. In the agitating deaerator, the vacuum tank is composed of two tanks: an upper tank having a large-diameter upper flange on the lower periphery and a lower tank having a lower flange with a smaller diameter than the upper flange on the upper periphery; The tank is installed on the machine frame via a bracket protruding from the middle of its outer circumferential surface, and between the upper flange and the lower flange, the tank is formed on the periphery of a support member for supporting the liquid pumping pipe. A vacuum stirring deaerator characterized in that the vacuum stirring deaerator is fastened by a group of bolts passing through three flanges and a group of bolts penetrating only two flanges via an intermediate flange having the same diameter as the upper flange.