JPH11267486A - Dilution tank device for chemical dosing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent a level switch float from moving up and down due to a liquid level wave and a liquid flow in a dilution tank, and to prevent a level switch from malfunctioning. SOLUTION: A dilution tank 1 into which dilution water and a drug stock solution are injected, and a stirring blade 5c for stirring the dilution water and the drug stock solution.
And whether or not the liquid surface 8 is at a predetermined position
a and a level switch 6 formed by disposing a float 6b on the a, and a waving prevention which is disposed in the dilution tank 1 and forms a communication portion 7 at a lower portion so as to shield the vicinity of the level switch 6 from the vicinity of the stirring blade 5c. And a plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dilution tank device for a chemical injection device.

[0002]

2. Description of the Related Art With respect to a conventional dilution tank for a chemical injection device,
This will be described with reference to FIG. Conventional dilution tank 1 shown in FIG.
Comprises a stock drug solution inlet 3 for injecting stock drug solution, a dilution water inlet 4 for injecting dilution water, a stirring device 5 for stirring the stock drug solution and dilution water, and a stock drug solution and dilution water. A level switch 6 for detecting whether the liquid level is at a predetermined position is provided.

[0003] The stirring device 5 includes a motor 5a provided at an upper portion of the dilution tank 1, a shaft 5b having an upper end connected to the motor 5a and a lower portion inserted into the dilution tank 1.
The propeller 5c is provided at the lower end of the shaft 5b. The rotation of the propeller 5c stirs the liquid in the dilution tank 1, generates a vortex flow, and undulates the liquid surface 8.

The level switch 6 has a vertically movable guide pipe 6a provided in the dilution tank 1 and a vertically movable float 6b.
A limit switch (not shown) is actuated by the vertical movement of b to detect whether the liquid level 8 is at a predetermined position.

[0005]

In a conventional dilution tank for a chemical injection device, the liquid surface is wavy when a stock solution and dilution water are injected into the dilution tank, and a swirling flow is generated during a stirring operation. At the same time, the liquid surface undulates.

The liquid flow generated in the liquid or the wave generated on the wave front may cause the float of the level switch to move up and down, thereby causing the level switch to malfunction. The present invention seeks to solve the above problems.

[0007]

According to a first aspect of the present invention, there is provided a dilution tank device for a chemical injection device, comprising: a dilution tank into which dilution water and an undiluted chemical solution are injected; And a stirring blade for stirring the stock solution, a level switch formed by providing a vertically moving float on a guide pipe disposed vertically near the inner side wall of the dilution tank, and a level switch near the stirring blade to near the level switch. It is characterized by comprising a wavy preventing plate which is vertically disposed in the dilution tank so as to be shielded and which forms a communication part at a lower part.

In the above, when diluting water and a drug stock solution are injected into the dilution tank, a wave is generated on the liquid surface in the dilution tank, and when the stirring blade is rotated to stir the liquid, A wave is generated on the surface and a flow occurs in the liquid.

In the present invention, an anti-waving plate is provided to shield the vicinity of the level switch from the vicinity of the stirring blade. This plate attenuates the wave on the liquid surface propagating to the level switch and suppresses the flow in the liquid. The vertical movement of the float can be prevented, and the malfunction of the level switch can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dilution tank device for a chemical injection device according to an embodiment of the present invention will be described with reference to FIG.

In the present embodiment shown in FIG. 1, a cylindrical dilution tank 1 having a chemical stock solution inlet 3 and a dilution water inlet 4 provided at an upper portion thereof, and a stirring device 5 having a propeller 5c provided inside the tank 1 are provided. And a dilution tank device for a drug injection device including a level switch 6 in which a float 6b guided by a guide pipe 6a is provided in the dilution tank 1, the level switch 6 in the dilution tank 1 is provided. A wavy preventing plate 2 is provided which partitions a portion and other portions and forms a communicating portion 7 at a lower portion of the partition.

The agitating device 5 is a device in which a propeller 5c provided in the dilution tank 1 is connected to a motor 5a provided in the upper portion of the dilution tank 1 by a shaft 5b. A limit switch (not shown) is operated by the vertical movement of the float 6b.

In the above, when a chemical stock solution and dilution water are injected into the dilution tank 1 via the chemical stock solution inlet 3 and the dilution water inlet 4, a wave is generated on the liquid level 8 in the dilution tank 1 and When the stirring device 5 is operated, a swirl flow is generated in the liquid in the dilution tank 1 and a wave is generated on the liquid surface 8.

In this embodiment, the level switch 6
Since the anti-waving plate 2 is provided so as to cover the liquid, the wave generated on the liquid surface 8 and propagated to the level switch can be attenuated by this, and the flow in the liquid can be suppressed. 6b can be prevented from moving up and down, and malfunction of the level switch 6 can be prevented.

[0015]

According to the present invention, a dilution tank device for a chemical injection device is provided.
A dilution tank into which dilution water and a drug stock solution are injected, a stirring blade for stirring the dilution water and the drug stock solution, and a level formed by arranging a float on a guide pipe by detecting whether or not the liquid surface is at a predetermined position. A switch and a wave preventing plate disposed in the dilution tank so as to shield the vicinity of the level switch from the vicinity of the stirring blade and forming a communication portion at a lower portion, and the wave preventing plate is provided with the dilution tank. Attenuating or suppressing the propagation of waves generated in the liquid surface and flow generated in the liquid to the level switch, it is possible to prevent the float from moving up and down due to these, and to prevent malfunction of the level switch. Become.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a dilution tank device for a chemical injection device according to one embodiment of the present invention.

FIG. 2 is an explanatory view of a conventional dilution tank device for a chemical injection device.

[Explanation of Signs] 1 Dilution tank 2 Anti-wavy plate 3 Chemical stock solution inlet 4 Dilution water inlet 5 Stirrer 5a Motor 5b Shaft 5c Propeller 6 Level switch 6a Guide pipe 6b Float 7 Communication part 8 Liquid level

Claims (1)

[Claims] 1. A dilution tank into which dilution water and a drug stock solution are injected, a stirring blade disposed near the center of the inside of the tank and agitating the dilution water and the drug stock solution, and vertically near the inner side wall of the dilution tank. A level switch formed by providing a vertically moving float on the disposed guide pipe, and a communication portion formed vertically in the dilution tank so as to shield the vicinity of the level switch from the vicinity of the stirring blade and the lower portion. A dilution tank device for a chemical dosing device, comprising: a waving preventing plate.