JPH073702U - Rotating blade type defoaming device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention changes the liquid quality with respect to foam generated on the liquid surface of a tank used for foaming cooling liquid used for machine tools or other general foaming liquid. First, it is an object of the present invention to provide a device in which the effervescent liquid can be used without anxiety, because the device is made compact or the bubbles are broken and gradually defoamed without adversely affecting the environment. [Structure] The rotary vane type defoaming device of the present invention floats a swastika type rotary vane 5 that follows in a constant floating state on the liquid surface of a tank used for foaming liquid, for example, a variable speed integrated speed reducer. The low speed rotation of the electric motor 11 etc. is transmitted to the vertical rotary drive plate 7 through the coupling 9 and the joint 8, and this rotary drive plate 7 is perpendicular to the center of the swastika rotary blade 5 and has a rectangular cross section. 6. The defoaming device is characterized in that the swirl-shaped rotary vane 5 is slowly rotated by allowing 6 to pass therethrough, and the foam 4 on the liquid surface is bent and taken into the vane by the vane 12 and gradually broken. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention does not change the liquid quality of the foaming cooling liquid used for machine tools or foam generated on the liquid surface of the tank used for other general foaming liquids, makes the device compact, or It is a device that can use the effervescent liquid with peace of mind because it can be defoamed gradually without degrading the environment and gradually defoaming.

[0002]

[Prior art]

 As a defoaming method, conventionally, a method of chemically adding an antifoaming agent, or a heating (electric heater) 22, forced filtration 24 by a pump 23, etc. are shown as a partial example in FIG. Physical methods such as radiation irradiation, high frequency vibration, and spark were generally known. However, neither of these methods had any adverse effects and could not be eliminated.

[0003]

[Problems to be solved by the device]

 Machine tool cooling fluids are mixed with additives that increase permeability to improve processability, and general foaming fluids, such as those related to fermentation, generate more foam and more. It is becoming tougher and it is becoming more difficult to break it. As a result, a foam layer floating on the surface of the liquid accumulated, causing frequent problems such as overflowing from the tank and soiling the floor. In addition, unlike liquid level detection, there are few suitable sensors for detecting these bubbles, and even if there are expensive sensors, there is no suitable and low-cost sensor, and it is becoming increasingly difficult to break the bubbles. . Therefore, as the defoaming means, a chemical defoaming agent may be considered first, but in this case, the liquid is deteriorated, and in the next physical defoaming, the actual condition in terms of cost, space, environment, etc. There were many problems and problems that could not be met.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above-mentioned problems, and rotates slowly on the liquid surface of a tank used for a foaming cooling liquid used for machine tools or other general foaming liquids. The stirring rotary blade is floated, and the rotary blade is made to follow the vertical movement of the liquid surface at a constant floating state, and it is possible to easily change the rotation speed to an appropriate speed and to take in bubbles between the blade phases. It is a rotary vane type defoaming device.

[0005]

[Work]

 For example, a swastika-shaped rotary blade floating on the cooling liquid surface has a hole with a rectangular cross section in the center, and a belt-shaped rotary drive plate with the same cross-section that penetrates this hole with a margin is inserted vertically. The upper end of this rotary drive plate is connected to a rotary drive body such as a DC motor or an inverter motor (hereinafter referred to as a variable speed motor) that can be decelerated and easily changed to an appropriate rotational speed. Therefore, when a slow rotational drive is given to the swastika rotary vane from this driver, the swastika rotary vane always follows the fluctuation of the cooling liquid level in a constant floating state at a low speed. Rotate with stirring.

Therefore, the foam group floating between the mutual blades of the swirl-shaped rotary blade is slowly and appropriately set to rotate the swirl-shaped blade, and each blade is curved so as to take in the foam. Due to the blade, most of the bubbles stayed between the curved blades due to the surface tension of the foam, and the front surface of the blade was broken by pressing, and the rear surface of the blade adhered to the curved blade surface with the same surface tension as above. A thing is pulled by a foam group that has been compressed and contracted by the trailing blades and is torn, and if such a bubble breaks in, the surrounding bubbles will also enter, and these phenomena continue to be repeated. Bubbles are gradually defoamed in the meantime.

[0007]

【Example】

 An embodiment in which the rotary vane type defoaming device of the present invention is used in a coolant tank of a machine tool using a coolant will be described with reference to FIG. The cooling liquid 2 is stored in the cooling liquid tank 1, and bubbles 4 are generated on the liquid upper surface 3. On the liquid surface, the swirl-type rotary blade 5 for agitation floats part of the vertical surface of the curved blade 12 above the liquid surface. A hole 6 having a rectangular cross section is vertically penetrated through the swirl-shaped rotary blade 5, and a rotary drive plate 7 is vertically penetrated through the hole 6 with a margin. A soft resin coating is applied to both the inner surface of the rectangular hole 6 of the swastika rotary blade 5 and the surface of the rotary drive plate 7 related to the hole 6. The upper end of the rotary drive plate 7 is connected via a joint 8 and a coupling 9 to a speed reducer-integrated variable speed electric motor 11 mounted on a bracket 10.

Therefore, the low speed rotation of the speed reducer-integrated variable speed electric motor 11 slowly rotates the swastika type rotary blades 5 via the coupling 9, the joint 8 and the rotary drive plate 7. Then, the foam 4 on the liquid upper surface 3 is taken in between the curved blades 12 of the swastika rotary blade 5, and is attached to the vertical surface of the swastika rotary blade 5 due to the surface tension. Is crushed, and a part of the foam 4 is also torn or broken on the opposite side. If such a bubble breaking action proceeds between the curved blades 12, the surrounding bubbles 4 again enter into this and the bubble breaking action similar to the above is repeated and the bubbles are gradually eliminated. In addition, a suitable rotation speed is required for breaking the bubbles depending on the type and state of the foam 4, but the optimum rotation speed is set by the variable speed electric motor 11 integrated with the speed reducer, which corresponds to this. . Also, due to the soft resin coating applied to the inner surface of the rectangular hole 6 of the swirl-shaped rotary blade 5 and the surface of the rotary drive plate 7 related to the hole 6, chips and other foreign matter attached to this, Alternatively, it prevents the swollen rotary blade 5 from being improperly moved due to rusting. Further, the swastika-shaped rotary blade 5 has such a shape that it takes in bubbles by rotation, so that depending on the condition of the tank liquid surface, either forward or reverse rotation can be easily turned over and dealt with.

[0009]

[Effect of device]

 According to the rotary vane type defoaming device of the present invention, deterioration of liquid quality by chemical means using an antifoaming agent for foaming cooling liquid, which has been a problem in the past, or heating, filtration, radiation irradiation, and high frequency vibration Since it is possible to gradually defoam without worrying about the high cost by using physical means such as sparks, the expansion of space, or the adverse effect on the environment, machines and general industrial equipment using the effervescent liquid can be used. It can be operated with confidence.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a rotary vane type defoaming device according to an embodiment of the present invention is applied to a foamed cooling liquid tank.

FIG. 2 is an explanatory view of a partial example of a conventional physical defoaming means.

[Explanation of symbols]

1 ・ ・ Coolant tank 8 ・ ・ Joint 3 ・ ・ Liquid upper surface 9 ・ ・ Coupling 4 ・ ・ Foam 11 ・ ・ Variable speed electric motor integrated with speed reducer 5 ・ ・ Small type rotary blade 12 ・ ・ Bending blade 7 ・ ・Rotary drive plate

Claims (3)

[Scope of utility model registration request] 1. A slowly rotating stirring rotary blade is floated on the liquid surface of a tank used for a foaming cooling liquid used for a machine tool or other general foaming liquid, and this rotating blade is attached to the liquid surface. A rotary vane type defoaming device, characterized in that it is made to follow vertical fluctuations in a constant floating state, can be easily changed to an appropriate rotational speed, and has a shape to take in bubbles between the blades. 2. The rotary vane type defoaming device according to claim 1, wherein the rotary vanes are provided with a soft resin coating on the mutual surfaces of the rotary transmission portions of the vanes. 3. The rotary vane type defoaming device according to claim 1, wherein the rotary vane can be easily turned inside out and can be rotated in either forward or reverse directions.