JPH0595639U - Stirrer - Google Patents

Abstract

(57) [Summary] [Purpose] When bubbles are generated from the liquid in the stirring tank, they are eliminated early to shorten the time required for stirring work. [Structure] The lid 4 has an introducing portion 21 extending into the stirring tank 1.
A, the lead-out portion 21B, and the lead-in portion 21A and the lead-out portion 21B, which are connected between the lead-in portion 21A and the lead-out portion 21B and are provided on the inner peripheral side.
A plurality of bypass pipes 24A to 24 that connect to the side by bridging
A defoamer 21 including a loop portion 21D provided with F is provided.
It is arranged horizontally in the stirring tank 1 with respect to 1. Introductory part 21A
Hot water is supplied from the loop portion 21D and the bypass pipe 2
By causing 4A to 24F to generate heat, the bubbles in contact with the defoamer 21 are expanded and destroyed by the heat of the defoamer 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stirrer for manufacturing a kneaded product or an emulsion (hereinafter referred to as an emulsion) by stirring raw materials such as cosmetics, medicines, foods (hereinafter referred to as cosmetics), for example.

[0002]

[Prior Art]

 FIG. 3 shows a stirring device according to the prior art.

In the figure, reference numeral 1 denotes a stirring tank having an opening 1A at the upper end, a cylindrical body 1B located in the middle, and a hemispherical bottom 1C formed at the lower end. A fitting hole 2 for fitting a cock 14, which will be described later, is formed in the center of the bottom portion 1C of 1. Further, an annular jacket 3 for heating or cooling the raw material A as a liquid charged in the stirring tank 1 is attached to the outside of the body portion 1B of the stirring tank 1, and inside the jacket 3. Steam or cooling water is selectively supplied.

Reference numeral 4 denotes a lid provided on the stirring tank 1 to cover the opening 1A of the stirring tank 1, and the lid 4 is a suitable attaching / detaching means such as a hook or a tightening lever (not shown). And is detachably attached to the opening portion 1A of the stirring tank 1 via the (1).

Reference numeral 5 denotes a tubular support member that is fixedly inserted through the center of the lid 4, and 6 is a hollow tubular rotary shaft that is rotatably inserted through the tubular support member 5 through a bearing 7. One end of the tubular rotary shaft 6 projects outside the lid 4 and is connected to a rotation source (not shown) such as a motor, and the other end projects into the stirring tank 1.

Reference numeral 8 denotes a gate mixer serving as an outer stirring blade fixed to the other end of the tubular rotary shaft 6, and the gate mixer 8 extends along the inner peripheral surface of the body 1B of the stirring tank 1 toward the opening 1A side. A plurality of substantially L-shaped trunks 8A, 8A, ... Which extend to the bottom 1C side and are fixed to the outer circumference of the other end of the tubular rotary shaft 6 at one end, and the stirring tank 1 from each trunk 8A. , And a plurality of stirring blades 8B, 8B, ...

Reference numeral 9 denotes a hollow support shaft that is inserted into the tubular rotary shaft 6 to support a stator 12A of a homomixer 12 to be described later, and one end side of the support shaft 9 projects outside the lid 4 and is not shown. It is fixed to a mounting member so that the support shaft 9 does not rotate relative to the stirring tank 1. On the other hand, the other end of the support shaft 9 projects toward the bottom portion 1C of the stirring tank 1, and a disc-shaped commutation plate 10 is inserted on the outer peripheral surface of the support shaft 9 and is located above the gate mixer 8. The raw material A that is fixed and stirred in the stirring tank 1 is made to flow from the center side to the outer peripheral side. Further, a plurality of fixed blades 11, 11, ... Are located between the stirring blades 8B, 8B, ... Of the gate mixer 8 and radially protrude from the outer peripheral surface of the support shaft 9 on the other end side.

Reference numeral 12 denotes a homomixer which sucks up the raw material A in the stirring tank 1 from the bottom 1C side and stirs it by circulating the raw material A in the stirring tank 1. The homomixer 12 is fixed to the shaft end of the support shaft 9. It comprises a stator 12A and a turbine 12B as an agitating blade inside which is loosely fitted in the stator 12A. The turbine 12B is rotationally driven by an inner rotary shaft 13 inserted in a support shaft 9. ing. The homomixer 12 configured as described above is disposed near the boundary between the body portion 1B and the bottom portion 1C of the stirring tank 1.

Reference numeral 14 is a cock fitted in the fitting hole 2 of the stirring tank 1, and is configured to be opened by screwing a stopper 14B screwed into the stopper mounting hole 14A of the cock 14. There is.

Reference numeral 15 is an exhaust port formed in the lid 4, 16 is one end connected to a vacuum pump (not shown) as a pressure reducing means, and the other end is connected to the exhaust port 15 of the lid 4 for defoaming. In the flexible pipe 16, the flexible pipe 16 sucks the air in the stirring tank 1 by a vacuum pump to reduce the pressure, and prevents bubbles from being mixed into the raw material A being stirred.

Reference numeral 17 denotes a bubble detector attached to the lid 4, the bubble detector 17 being provided at a position lower than the exhaust port 15 and, for example, a liquid of the raw material A based on a change in electric conductivity. The bubbles generated on the top of the surface A1 are detected. The bubble detector 17 is connected to a controller (not shown), and this controller starts and stops the vacuum pump connected to the flexible pipe 16 based on the detection signal from the bubble detector 17. ing.

When the raw material A such as cosmetics is stirred using the conventional stirring device configured as described above, the raw material A is placed in the stirring tank 1 at a liquid level A1 shown by a dotted line in FIG. Insert to the position. Next, the inside of the stirring tank 1 is decompressed by a vacuum pump through the flexible pipe 16 to remove bubbles from the raw material A, and steam is supplied into the jacket 3 to heat the raw material A from the outside of the stirring tank 1. To do. Then, the gate mixer 8 is rotated in a predetermined direction to cause the raw material A to flow from the upper side of the agitation tank 1 to the bottom 1C side and agitated between the fixed blades 11. On the other hand, when the turbine 12B of the homomixer 12 rotates, the raw material A is sucked up from the bottom 1C side and collides with the commutation plate 10 to flow to the outer peripheral side. As a result, the raw material A is agitated while circulating in the stirring tank 1. It

When the foam generated from the raw material A rises to the position of the foam detector 17, the control device stops the vacuum pump based on the detection signal from the foam detector 17, and the foam of the raw material A is detected. It is prevented from being sucked into the vacuum pump through the exhaust port 15. Then, when the bubbles generated on the liquid surface A1 of the raw material A spontaneously disappear and the level of the bubbles becomes lower than that of the bubble detector 17, the controller detects a vacuum based on the detection signal from the bubble detector 17. The "degassing step" for restarting the operation of the pump is repeated to prevent bubbles from being mixed in the raw material A. When the raw material A is in a sufficiently agitated state, cooling water is supplied into the jacket 3 instead of steam as needed, and the agitation tank 1 is cooled to complete the agitation of the raw material A.

[0014]

By the way, in the above-mentioned conventional stirring apparatus, the gate mixer 8 and the homomixer 12 are rotationally driven, and at the same time, the vacuum pump is operated to reduce the pressure in the stirring tank 1 and the raw material A When the bubbles generated on the liquid surface A1 of the raw material A reach the level of the bubble detector 17, the vacuum pump is stopped and the bubbles of the raw material A are sucked into the vacuum pump from the exhaust port 15. It is designed to prevent

However, in the prior art, since the bubbles are spontaneously extinguished until the vacuum pump is operated again after the vacuum pump is once stopped, the operation of the vacuum pump is interrupted. There is a problem that the foaming process takes extra time.

When the raw material A is apt to generate bubbles, there is a time delay until the vacuum pump is stopped by the control device after the bubbles are detected by the bubble detector 17, and the bubbles of the raw material A 1 are generated. It may be sucked into the vacuum pump side, causing problems such as damage to the vacuum pump and the need to change the oil in the vacuum pump.

The present invention has been made in view of the above-mentioned problems of the prior art. The present invention is capable of quickly defoaming and removing bubbles when they occur on the liquid in the stirring tank. It is an object of the present invention to provide a stirrer capable of reliably preventing the bubbles generated on the liquid surface from being sucked from the exhaust port to the pressure reducing means side.

[0018]

[Means for Solving the Problems]

 The feature of the configuration adopted by the present invention to solve the above-mentioned problems is that the liquid in the agitation tank is disposed at a predetermined height position in the agitation tank in the lid, and the heat medium is circulated inside the lid. There is a tubular defoamer that defoams the bubbles generated from inside.

[0019]

[Action]

 With the above configuration, if a heat medium is circulated in the defoamer to keep the defoamer in a high temperature state, even if foam is generated on the liquid in the stirring tank, this foam contacts the defoamer. When this happens, the bubbles will expand due to thermal expansion, and the bubbles can be effectively removed in a short time.

[0020]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the embodiments, the same components as those of the above-mentioned conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 21 denotes a defoamer which is inserted into the stirring tank 1 through two mounting holes 22 (only one is shown) provided in the lid body 4 and welded and fixed to the lid body 4, The defoamer 21 is formed of a metal tube having high corrosion resistance such as stainless steel as shown in FIG. 2, and has an inlet 21A and outlet 21B extending vertically in the stirring tank 1. A loop portion 21D is formed between the introduction portion 21A and the lead-out portion 21B so as to be bent in an annular shape through a bent portion 21C that bends in the horizontal direction, and is arranged in the stirring tank 1 coaxially with the body portion 1B. It is roughly composed. Here, the defoamer 21 is arranged such that the loop portion 21D is located between the foam detector 17 and the liquid surface A1 of the raw material A. For example, in the introduction portion 21A, the valve 23 is provided outside the lid 4. A boiler (not shown) is connected via. Then, hot water or water vapor (hereinafter referred to as hot water) as a heat medium of 80 ° C. or higher is circulated from the boiler in the defoamer 21, and the loop portion 21D and the like are kept in a high temperature state. There is.

24A, 24A, 24B, ..., 24F form a part of the defoamer 21, and are connected to the inner peripheral side of the loop portion 21D so as to bridge the introduction portion 21A side and the extraction portion 21B side. A pipe (generally referred to as a bypass pipe 24) is shown. The bypass pipe 24 is arranged in parallel in the order of the bypass pipes 24A, 24B, ..., 24F from the bent portion 21C side, and the inner portion thereof is the same as the loop portion 21D. Hot water flows. Here, the bypass pipes 24C and 24D are largely separated from each other as shown in FIG. 2, and the tubular rotary shaft 6 is inserted between them. Further, the bypass pipes 24A to 24F are sequentially formed to have large diameters in the order of, for example, the bypass pipes 24A, 24B, ... Also, the flow resistance when hot water flows through each of the bypass pipes 24A to 24F is configured to be equal.

When the hot water is supplied from the introduction part 21A, the hot water flows to the outlet part 21B side through the loop part 21D, and a part of the hot water is supplied to each of the bypass pipes 24A to 24A. The defoamer 21 flows through the inside of 24F toward the outlet 21B, and at this time, the defoamer 21 is configured to generate heat almost uniformly based on the amount of heat of the hot water flowing through the loop 21D and the bypass pipes 24A to 24F. ing.

The stirrer according to the present embodiment has the above-mentioned configuration, and its basic operation is not different from that according to the prior art.

However, in this embodiment, the introduction portion 21A and the lead-out portion 21B extending in the vertical direction in the stirring tank 1, and an annular bend formed between the introduction portion 21A and the lead-out portion 21B, the inner peripheral side The defoamer 21 is composed of a loop portion 21D provided with a plurality of bypass pipes 24A to 24F connected to each other by bridging the introduction portion 21A side and the derivation portion 21B side. And the liquid surface A1 of the raw material A are fixedly provided to the lid body 4 so as to be horizontal, and the hot water supplied from the introducing portion 21A is led to the outlet portion 21B side via the loop portion 21D and the bypass pipe 24. Since the loop portion 21D of the defoamer 21 and the bypass pipe 24 are configured to generate heat substantially uniformly by being circulated, the following effects are obtained.

That is, when the gate mixer 8 and the homomixer 12 are rotationally driven and at the same time the vacuum pump is operated to reduce the pressure in the stirring tank 1 to perform stirring, bubbles generated on the liquid surface A1 of the raw material A disappears. When the foam is contacted with the foamer 21, the heat from the foamer 21 expands the internal gas, or the foam film evaporates and is quickly destroyed and defoamed. It is possible to reliably prevent the level of the bubble detector 17 from being exceeded beyond 21. Therefore, it is not necessary to stop the vacuum pump during the stirring work, and the defoaming step can be quickly completed.

Further, even if foam is generated from the raw material A, the foam can be quickly defoamed by the defoaming device 21, so that the foam of the raw material A is removed from the flexible pipe 16 through the exhaust port 15. Accidents that may be sucked into the empty pump and damage the vacuum pump can be prevented, maintainability can be improved, and the time required to maintain the required vacuum degree in the stirring tank 1 can be shortened. The overall workability can be greatly improved.

In the above-described embodiment, the defoamer 21 is formed by introducing the introduction portion 21A and the extraction portion 21B, and bending it in an annular shape between the introduction portions 21A and the extraction portion 21B. However, the present invention is not limited to this, and the present invention is not limited to this, and the loop portion 21D is provided with a plurality of bypass pipes 24A to 24F that bridge and connect the lead portion 21B side. May be formed into a spiral shape by using a metal tube, or may be configured by a continuous metal tube that horizontally extends back and forth in the body portion 1B of the stirring tank 1. In this case, The bypass pipes 24A to 24F can be omitted.

Further, in the above-mentioned embodiment, the gate mixer 8 is fixedly provided to the tubular rotary shaft 6 inserted from the upper side into the stirring tank 1 through the lid body 4, and the upper side of the stirring tank 1 is provided by the rotary shaft 6. Although the present invention is not limited to this, the present invention is not limited to this. For example, instead of the tubular rotary shaft 6, another rotary shaft is inserted upward from the bottom portion 1C into the stirring tank 1, and the rotary shaft is rotated. A gate mixer may be fixedly provided on the shaft, and the rotation shaft may drive the gate mixer from the lower side of the stirring tank 1. In this case, the gate mixer and the homomixer 12 face each other at the upper side and the lower side. It can be provided.

[0030]

[Effect of the device]

 As described above in detail, according to the present invention, the lid body is disposed at a predetermined height position in the stirring tank, and the heat medium is circulated inside the lid, so that the liquid is generated from the liquid in the stirring tank. Since a tubular defoamer for defoaming air bubbles was installed, if a heat medium is circulated in the defoamer to keep the defoamer at a high temperature, bubbles will be generated in the liquid in the stirring tank. Even if the bubbles touch the defoamer, the bubbles can be surely extinguished, and it is possible to prevent the bubbles of the liquid from overflowing to the exhaust port and being sucked into the decompression unit side. The time for decompressing the inside can be surely shortened, and the workability of the whole stirring work can be greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a stirring device according to an embodiment of the present invention.

2 is an enlarged perspective view showing the defoamer in FIG. 1. FIG.

FIG. 3 is a vertical sectional view showing a stirring device according to the prior art.

[Explanation of symbols]

 1 Stirring tank 1A Opening 1B Body 1C Bottom 4 Lid 8 Gate mixer (stirring blade) 12 Homomixer 12B Turbine (stirring blade) 15 Exhaust port 21 Defoamer 21A Introducing part 21B Deriving part 21D Loop part 23 Valve 24A-24F Bypass Tube A Raw material (liquid)

Claims (1)

[Scope of utility model registration request] 1. A stirring tank having an opening on one side and a bottom on the other side, and a lid body detachably attached to the opening of the stirring tank to cover the opening of the stirring tank. A stirring blade provided inside the stirring tank for stirring the liquid in the stirring tank by being rotationally driven; and an exhaust port provided to the lid and connected to a pressure reducing means for reducing the pressure inside the stirring tank. In the stirrer consisting of, the lid body is disposed at a predetermined height position in the stirring tank, and a heat medium is circulated therein to eliminate bubbles generated from the liquid in the stirring tank. A stirrer provided with a tubular defoamer.