JPH0985074A - Liquid mixing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive and miniaturized liquid mixing apparatus simple in structure by providing electromagnetic opening and closing valves on the upstream side of first and second flow rate measuring pipelines and providing a control device controlling a timer so as to open the respective electromagnetic opening and closing valves for a predetermined time. SOLUTION: For example, when a first liquid A and a second liquid B are desired to be mixed in a ratio of 1:1, if the flow rate of the first liquid A is 1l/min and the flow rate of the second liquid B is 5l/min, the flow rate ratio of both liquids A, B becomes 1:5. Therefore, the opening time of an electromagnetic opening and closing valve 23 by the timer T of a control device 26 may be set to twice the opening time of an electromagnetic opening and closing valve 22 by the timer T1 . If the setting time of the timer T1 is set to 5min and the setting time of the timer T2 is set to 10min, 5l of the first liquid A and 50l of the second liquid B are supplied after the elapse of 10min. These liquids are mixed in a mixing liquid tank 2 and a mixed liquid A+B is obtained in a mixing ratio of 1:10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing device for mixing two types of liquids, and more particularly to a liquid mixing device used when mixing both liquids in a relatively rough ratio.

[0002]

2. Description of the Related Art For example, a cutting oil generally used for machine tools, that is, a coolant is a mixture of water and water-soluble oil at a mixing ratio of about 10: 1. In this case, if the desired mixing ratio is 10: 1, there is almost no problem in using the coolant even if the actually mixed ratio is 9: 1 or 11: 1.

However, in order to manufacture the above-mentioned coolant, an automatic mixing apparatus which can mix two kinds of liquids in an accurate ratio by using a sophisticated device such as an automatic flow meter has been conventionally used. However, the production cost is very high, and the size of the entire device is large, which requires a large installation space.

In view of the above problems, it is an object of the present invention to provide a mixing device which has a simple structure and can be manufactured at low cost, and which can be downsized.

[0005]

A liquid mixing apparatus according to claim 1 of the present invention is a mixing apparatus for mixing a first liquid A and a second liquid B, and a first liquid A is stored. A liquid tank 1 and a mixed liquid tank 2 for storing the mixed liquids A and B of the first liquid A and the second liquid B are provided, and the first liquid tank 1 is provided with a first pump 3 for sucking the liquid inside the tank. In addition to providing the discharge port of the pump 3 and the mixed liquid tank 2,
A second pump 6 for sucking the internal liquid is provided in the mixed liquid tank 2 by a pipe line 4, and a mixed liquid discharge pipe line 7 is connected to the discharge port of the pump 6, and one end of the second liquid is The other end of the second pipeline 12 connected to the pressure supply unit is connected to the mixed liquid tank 2, and the first pipeline 4 and the second pipeline 12 are connected.
From the mixed liquid tank 2 side, a first fluid flow rate measuring conduit 16 with an opening / closing valve 14 and a second opening / closing valve 15
The fluid flow rate measuring pipe line 17 is branched so that the flow rate measuring pipes 18, 17 are respectively provided at the outlet sides of the flow rate measuring pipe lines 18, 17.
19, and opening / closing valves 20 and 21 are provided in the first conduit 4 and the second conduit 12 below the branch points of the flow rate measuring conduits 16 and 17, respectively, and the first conduit 4 is further provided. Of the electromagnetic on-off valve 2 on the upper side of the flow rate measuring pipeline 16 and on the second side of the second pipeline 12 than the flow rate measuring pipeline 17.
2 and 23 are provided, and a control device 26 that controls the solenoids 22 and 23 by a timer to open them for a predetermined time is provided.

In the use of the liquid mixing apparatus constructed as described above, first of all, the first and second pipe lines 4, 1
The solenoid on-off valves 22 and 23 of 2 are opened, and the on-off valves 20 and 21 are opened.
Closed, and the first and second fluid flow rate measuring pipe lines 16, 1
The on-off valves 14 and 15 of No. 7 are opened, and from this state, the first
The pump 3 is operated to cause the first liquid A in the first liquid tank 1 to flow from the first conduit 4 to the first fluid flow rate measuring conduit 16, and to supply the second liquid B to the second liquid pressurizing supply unit. Through the second conduit 12 to the second fluid flow rate measuring conduit 17, and the flow rate measuring containers 18 and 19 measure the respective flow rates of the first liquid A and the second liquid B. Further, the flow rate ratio between the first liquid A and the second liquid B is obtained from the measured value.

The first liquid A and the second liquid B are, for example, 1: 1.
When it is desired to mix at a ratio of 0, if the flow rate of the first liquid A is 5 liters / minute and the flow rate of the second liquid B is 1 liter / minute, the flow rate ratio of both liquids A and B is 5: 1. Therefore, if the opening time of each of the electromagnetic opening / closing valves 22 and 23 by the timers T1 and T2 of the control device 26 is set to be twice the opening time of the electromagnetic opening / closing valve 22 (on the first pipeline 4 side) by the timer T1. Good. Therefore, for example, by setting the set time of the timer T1 to 5 minutes and the set time of the timer T2 to 10 minutes, 5 liters of the first liquid A and 50 liters of the second liquid B are supplied after 10 minutes. Will be done.

The first liquid A and the second liquid B are separately mixed by the first conduit 4 and the second conduit 12, respectively.
Both of the liquids A and B are mixed under pressure in the tank 2, and the mixing ratio is 1:10.
Becomes The mixed liquids A and B in the mixed liquid tank 2 are closed by closing the opening / closing valve 9 of the bypass pipe 10 and opening the opening / closing valve 11 of the mixed liquid discharge pipe 7, and by operating the second pump 6, It is discharged to the outside through 7.

In this mixing device, as described above, before the two liquids A and B are supplied to the mixed liquid tank 2 and mixed, the liquids A and B are externally supplied through the first and second fluid flow rate measuring pipe lines 16 and 17, respectively. Since the first liquid A and the second liquid B are respectively circulated in the first pipe line 4 and the second pipe line 12, it can be directly confirmed by the operator's eyes. Since the respective flow rates of the liquids A and B are measured by the flow rate measuring containers 18 and 19, both liquids A and B are measured.
The flow rate of can be measured reliably.

According to a second aspect of the present invention, in the liquid mixing apparatus according to the first aspect, a bypass pipe line 10 with an opening / closing valve 9 branched from the mixed liquid discharge pipe line 7 and connected to the mixed liquid tank 2 is provided. The discharge pipe 7 is provided with an opening / closing valve 11 on the lower side of the bypass pipe 10.
According to this configuration, while the two liquids A and B are being supplied to the mixed liquid tank 2, the opening / closing valve 11 of the mixed liquid discharge pipe line 7 is closed and the opening / closing valve 9 of the bypass pipe line 10 is opened. By operating the pump 6, both liquids A and B are circulated between the tank 2 and the bypass line 10, and both liquids A and B are circulated.
B can be effectively mixed by stirring.

According to a third aspect of the present invention, in the liquid mixing apparatus according to the second aspect, the fluid from the first pipe line 4, the second pipe line 12 and the bypass pipe line 10 is allowed to join the mixed liquid tank 2. A merging portion 31 that flows into the tank 2 is additionally provided. According to this configuration, the first liquid A from the first conduit 4, the second liquid B from the second conduit 12, and the mixed liquids A and B from the bypass conduit 10 join together at one location. Therefore, both liquids A and B can be more effectively stirred and mixed in a short time.

A fourth aspect of the present invention is the liquid mixing apparatus according to any one of the first to third aspects, wherein the first pipe line 4 and the second pipe line 12 are located on the lower side of the electromagnetic on-off valves 22 and 23. The throttle valves 24 and 25 are provided respectively. With this configuration, the flow rate of the first liquid A flowing through the first pipeline 4 and the flow rate of the second liquid B flowing through the second pipeline 12 can be roughly set in advance, whereby the flow rate measuring container 1
The flow rate measurement of both liquids A and B in 8 and 19 becomes easy.

According to a fifth aspect of the present invention, in the liquid mixing apparatus according to any one of the first to fourth aspects, the mixed liquid tank 2 includes:
An upper limit liquid level sensor 28 and a lower limit liquid level sensor 29 are provided. According to this, the upper limit state and the lower limit state of the mixed liquids A and B in the mixed liquid tank 2 can be confirmed.

A sixth aspect of the present invention is the liquid mixing apparatus according to any one of the first to fifth aspects, wherein the water supply 13 is used as the second liquid pressurizing and supplying section. According to this, when one of the two liquids A and B to be mixed is water, a tank for storing water and a device for pressurizing the water in this tank are unnecessary, so that the equipment of the mixing device is very important. It will be easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall external view of a mixing apparatus used for producing a coolant, and a detailed piping diagram thereof is shown in FIG. In these figures, 1 is a first liquid tank for storing a first liquid (water-soluble oil) A, and 2 is a first liquid tank.
A mixed liquid tank for storing mixed liquids A and B of a liquid A and a second liquid (water) B. As shown in FIG. 1, the first liquid tank 1 and the mixed liquid tank 2 are vertically spaced from each other. It is arranged.

The first liquid tank 1 is provided with a first pump 3 for sucking the first liquid A inside the tank, and the discharge port of the first pump 3 and the mixed liquid tank 2 are connected by a first conduit 4. An on-off valve 5 is provided near the discharge port of the first pump 3, which is connected to the first conduit 4. Mixed liquid tank 2
Is provided with a second pump 6 for sucking the liquid inside,
In addition, a mixed liquid discharge pipeline 7 is connected to the discharge port of the second pump 6, and the tip side of the mixed liquid discharge pipeline 7 is connected to a nozzle device 8 arranged near the cutting portion of the machine tool. Connected. Further, a bypass pipe 10 with an on-off valve 9 that branches from a position close to the second pump 6 and is connected to the mixed liquid tank 2 is connected to the mixed liquid discharge pipe 7, and the mixed liquid discharge pipe 7 is also connected. An on-off valve 11 is provided at 7 on the lower side of the branch point with the bypass line 10.

One end of the second conduit 12 is connected to the faucet 13a of the water supply 13 serving as the second liquid pressurizing and supplying section, and the second
The other end of the conduit 12 is connected to the mixed liquid tank 2. A first fluid flow rate measuring pipeline 16 with an opening / closing valve 14 and a second fluid flow rate measuring pipeline 17 with an opening / closing valve 15 are branched from the mixed liquid tank 2 side of each of the first pipeline 4 and the second pipeline 12. The flow rate measuring containers 18 and 19 are provided on the outlet sides of the flow rate measuring pipes 16 and 17, respectively. As the flow rate measuring containers 18 and 19, transparent containers with measuring scales are used.

Further, on-off valves 20 and 21 are provided in the first pipeline 4 and the second pipeline 12 below the branch points of the flow rate measuring pipelines 16 and 17, respectively, and the first pipeline is provided. Electromagnetic on-off valves 22 and 23 are provided on the upstream side of the flow rate measuring pipeline 16 of 4 and on the upstream side of the flow rate measuring pipeline 17 of the second pipeline 12, respectively. Then, the throttle valve 2 is provided on the lower side of each of the electromagnetic opening / closing valves 22 and 23.
4, 25 are provided. Each of these solenoid on-off valves 22,
A control device 26 is provided to control the timer 23 so that the timers T1 and T2 are opened for a predetermined time. In addition, each solenoid on-off valve 22, 23 is closed in the non-energized state,
It is designed to open when energized, but by operating the control device 26 when necessary, each electromagnetic on-off valve 22,
23 can be opened for a predetermined time by timers T1 and T2, respectively.

A lower limit liquid level sensor 2 is provided in the first liquid tank 1.
7 is provided, and the mixed liquid tank 2 is provided with an upper limit liquid level sensor 28 and a lower limit liquid level sensor 29. Each of the sensors 27 to 29 is, for example, a float switch, and when each liquid level is detected, an alarm is issued by the detection signal. Further, as shown in FIG. 1, an operation panel 30 for operating the control device 26 and the like is attached to the mixed liquid tank 2 side. Further, the mixed liquid tank 2 is further provided with a merging portion 31 which merges the fluids from the first pipeline 4, the second pipeline 12, and the bypass pipeline 10 and flows into the tank 2.

Next, the case where the coolant is mixed and manufactured by using the mixing device having the above-mentioned structure will be described. In this case, the first liquid A (oil) and the second liquid B
The mixing ratio with (water) is about 1:10. In advance, the first liquid A (water-soluble oil) is stored in the first liquid tank 1 to the maximum extent, and one end of the second pipeline 12 has a water supply 13
Connect to the tap 13a.

First, the throttle valves 24 and 25 are adjusted so that the first
A rough flow rate setting for each of the pipeline 4 and the second pipeline 12 is performed. For example, since the consumption of the first liquid A (oil) is small, the flow rate of the first pipeline 4 is set to be small, and the consumption of the second liquid B (water) is large, the flow rate of the second pipeline 12 is relatively small. Set larger. Further, the opening / closing valve 5 and the electromagnetic opening / closing valve 22 of the first conduit 4 are opened, the opening / closing valve 20 is closed, the electromagnetic opening / closing valve 22 of the second conduit 12 is opened, the opening / closing valve 21 is closed, and the first and the second Open / close valves 14, 15 of second fluid flow rate measuring pipes 16, 17
Leave open.

From this state, the first pump 3 is operated to move the first liquid A in the first liquid tank 1 from the first pipe line 4 to the first position.
The water is supplied to the pipe 16 for measuring the fluid flow rate,
The tap 13 is opened to allow tap water to flow from the second conduit 12 to the second fluid flow rate measuring conduit 17, and the flow rate measuring containers 18 and 19 cause the first liquid A and the second liquid B respectively. The flow rate of is measured manually. Also, from the measured value,
The flow rate ratio between the first liquid A and the second liquid B is calculated. For example, if the flow rate of the first liquid A is 5 liters / minute and the flow rate of the second liquid B is 1 liter / minute, the flow rate ratio between the two liquids A and B, that is, water and the coolant is 5: 1. .

In this way, when the flow rates of the first liquid A and the second liquid B are measured and the flow rate ratio between them is determined, the electromagnetic on-off valves 22 and 23 by the timers T1 and T2 of the controller 26 in the operation panel 30 are respectively determined. Set the opening time. In this case, since the mixing ratio of the first liquid A (oil) and the second liquid B (water) is 1:10, if the flow ratio of both liquids A and B is 5: 1, the electromagnetic wave generated by the timer T2 is The opening time of the opening / closing valve 23 (second pipe line 12 side) may be set to be twice the opening time of the electromagnetic opening / closing valve 22 (first pipe line 4 side) by the timer T1. After the time setting of the timers T1 and T2 is completed, the control device 26 is operated and the first pipeline 4 and the second pipeline 1 are operated.
By opening the on-off valves 20 and 21 of No. 2, the first pipeline 4
Further, the first liquid A and the second liquid B are supplied into the mixed liquid tank 2 from the second conduit 12 and the second conduit 12, respectively.

For example, if the capacity of the mixed liquid tank 2 is 100
If the volume is 1 liter, the flow rate of the first liquid A is 5 liters /
If the flow rate of the second liquid B is 1 liter / minute, the setting time of the timer T1 is set to 5 minutes and the setting time of the timer T2 is set to 10 minutes. Liquid A and 50 liters of second liquid B,
It is supplied to the mixed liquid tank 2 up to about half. Alternatively, the set time of the timer T1 is 8 minutes and the set time of the timer T2 is
If the setting time of is set to 16 minutes, it will be 8 after 16 minutes.
The first liquid A of liter and the second liquid B of 80 liter are supplied into the mixed liquid tank 2 to the full state.

First liquid A from first conduit 4 and second conduit 1
The second liquid B from 2 is merged at the merging portion 31 attached to the mixed liquid tank 2 and is supplied into the mixed liquid tank 2. During the supply, the on-off valve of the first pipeline 4 is opened. 1
By operating the second pump 6 with 1 closed and the open / close valve 9 of the bypass line 10 opened, the mixed liquids A and B supplied into the mixed liquid tank 2 are sucked into the second pump 6. From the bypass line 10 to the confluence part 31
Flow into the first conduit 4 from the first conduit 4.
The liquid A, the second liquid B from the second conduit 12, and the mixed liquids A and B from the bypass conduit 10 are supplied into the tank 2 in a combined state, and particularly, the mixed liquid tank The liquids A and B in 2 will circulate through the bypass line 10, whereby the first liquid A and the second liquid B will be effectively stirred and mixed.

If the bypass line 10 is provided, both liquids A and B, which are being supplied into the mixed liquid tank 2, are circulated through the bypass line 10 even if the merging portion 31 is not provided. Liquids A and B are thoroughly mixed. However, by providing the merging portion 31, the first
Since the first liquid A from the pipe line 4, the second liquid B from the second pipe line 12, and the mixed liquids A and B from the bypass pipe line 10 merge at one location, both liquids A and B are combined. Can be stirred and mixed effectively in a short time. Further, even when the bypass line 10 is not provided, the first liquid A from the first line 4 and the second liquid B from the second line 12 are pressurized in the mixed liquid tank 2 respectively. It is possible to mix both liquids A and B because they are supplied to the liquid. As described above, the first liquid A from the first conduit 4 and the second liquid B from the second conduit 12 are supplied into the mixed liquid tank 2 and mixed and stirred. When the mixed liquids A and B reach the upper limit position of the mixed liquid tank 2, the upper limit liquid level sensor 28 operates and issues an alarm.

When a predetermined amount of the mixed liquid A, B is accumulated in the mixed liquid tank 2, the opening / closing valve 9 of the bypass line 10 is opened.
Closed and the open / close valve 11 of the mixed liquid discharge conduit 7 is opened, the mixed liquids A and B in the mixed liquid tank 2 are discharged by the second pump 6 through the second conduit 12 and supplied to the nozzle device 8. It By the supply to the nozzle device 8, the mixed liquids A and B in the mixed liquid tank 2 are gradually decreased, and when the liquid level reaches the lower limit position, the lower limit liquid level sensor 29 is activated and an alarm is issued to mix the liquid. It informs that the mixed liquids A and B in the liquid tank 2 are running low. Therefore, by closing the opening / closing valve 11 of the mixed liquid discharge pipeline 7, opening the opening / closing valve 9 of the bypass pipeline 10, and reactivating the control device 26, the first pipeline 4 and the second pipeline 12 are separated. The first liquid A and the second liquid B are supplied into the mixed liquid tank 2 for a predetermined time set by the timers T1 and T2, and mixed.

When the first liquid A in the first liquid tank 1 reaches its lower limit position, the lower limit liquid level sensor 27 is activated and an alarm is issued to inform that the second liquid B is running low. At this time, the first liquid A is stored in the first liquid tank 1.
Should be replenished.

In the mixing apparatus of the above-mentioned embodiment, the tap water 13 is used as the second liquid pressurizing and supplying section, but a second liquid tank having a required height is provided, and the lower end side of the second liquid tank is provided. It is also possible to connect the end portion of the second pipeline 12 to and to supply the second liquid under pressure through the second pipeline 12 by the hydraulic pressure of the tank. However, as in this embodiment, by using the water supply 13 as the second liquid pressurizing and supplying unit, a large tank is not required, and there are troublesome problems such as rust and water leakage which are likely to occur in the case of a metal tank. Disappear.

[0030]

The mixing apparatus according to the first aspect of the present invention does not use an elaborate and complicated device such as an automatic flow meter,
Since it has a simple structure including an on-off valve that can be manually operated and a flow rate measuring container, it can be manufactured at low cost, has few failures, and the entire device can be made small and compact, saving space during installation. Moreover, in this mixing device, before supplying two kinds of liquids to the mixed liquid tank,
And the second fluid flow rate measuring pipes are taken out to the outside, respectively. Therefore, it is directly visible to the operator that the first liquid and the second liquid are flowing in the first pipe and the second pipe, respectively. It can be confirmed, and since the respective flow rates of both liquids are actually measured by the flow rate measuring container, the flow rates of both liquids can be reliably measured.

According to the mixing apparatus of the second aspect, while the both liquids are being supplied to the mixed liquid tank, the opening / closing valve of the mixed liquid discharge pipeline is closed and the opening / closing valve of the bypass pipeline is opened. By operating the two pumps, both liquids can be circulated between the tank and the bypass pipe, so that both liquids can be effectively stirred and mixed.

According to the third aspect of the mixing apparatus, the first liquid from the first conduit, the second liquid from the second conduit, and the mixed liquid from the bypass conduit are combined into one in the confluence section. Since the liquids can be combined at a place, both liquids can be more effectively stirred and mixed in a short time.

According to the mixing device of the fourth aspect, the flow rate of the first liquid flowing through the first pipeline and the flow rate of the second liquid flowing through the second pipeline can be roughly set in advance. It is possible to easily measure the flow rates of both liquids in the measuring container.

According to the mixing apparatus of the fifth aspect, the upper limit state and the lower limit state of the mixed liquid in the mixed liquid tank can be confirmed.

According to the mixing device of the sixth aspect, when one of the two liquids to be mixed is water, a tank for storing water and a device for pressurizing the water in the tank are not required. The equipment of the mixing device becomes very simple.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an example of a mixing device according to the present invention.

FIG. 2 is an explanatory view showing a detailed structure of the above mixing device.

[Explanation of symbols]

 1 1st liquid tank 2 mixed liquid tank 3 1st pump 4 1st pipeline 5 opening / closing valve 6 2nd pump 7 mixed liquid discharge pipeline 9 opening / closing valve 10 bypass pipeline 11 opening / closing valve 12 2nd pipeline 13 water supply 14 opening / closing Valve 15 Open / close valve 16 First fluid flow rate measuring conduit 17 Second fluid flow rate measuring conduit 18 Flow rate measuring container 19 Flow rate measuring container 20 Open / close valve 21 Open / close valve 22 Electromagnetic open / close valve 23 Electromagnetic open / close valve 24 Throttle valve 25 Throttle valve 26 Control device 27 Lower limit liquid level sensor for first liquid tank 28 Upper limit liquid level sensor for mixed liquid tank 29 Lower limit liquid level sensor for mixed liquid tank 31 Confluence section

Claims (6)

[Claims] 1. A mixing device for mixing a first liquid and a second liquid, the first liquid tank storing the first liquid, and the mixing storing the mixed liquid of the first liquid and the second liquid. A liquid tank, the first liquid tank is provided with a first pump for sucking the liquid inside the tank, and the discharge port of the pump and the mixed liquid tank are connected by a first pipe line; A second pump for sucking the internal liquid is provided, a mixed liquid discharge pipeline is connected to the discharge port of the pump, and one end of the second pipeline is connected to the second liquid pressurizing and supplying section. Is connected to the mixed liquid tank, and the first pipe and the second pipe are provided with an opening / closing valve from the mixed liquid tank side, respectively.
The fluid flow rate measuring pipeline and the second fluid flow rate measuring pipeline with an opening / closing valve are branched, and a flow rate measuring container is provided at the outlet side of each flow rate measuring pipeline. An on-off valve is provided on each of the channels below the branch point of the flow rate measuring pipeline, and further on the upstream side of the flow rate measuring pipeline of the first pipeline and the flow rate measuring pipeline of the second pipeline. A liquid mixing device comprising electromagnetic control valves provided on the upstream side of the passage, and a control device which controls each electromagnetic control valve to open for a predetermined time. 2. A bypass pipe with an on-off valve, which branches from the discharge pipe and is connected to a mixed liquid tank, is provided, and an on-off valve is provided on the discharge pipe below the bypass pipe. Item 2. The liquid mixing apparatus according to item 1. 3. The mixed liquid tank is further provided with a confluence portion for confluence of fluids from the first pipeline, the second pipeline and the bypass pipeline and flowing into the tank. Liquid mixing equipment. 4. The liquid mixing apparatus according to claim 1, wherein a throttle valve is provided on each of the first pipeline and the second pipeline on a lower side of the electromagnetic opening / closing valve. 5. The liquid mixing apparatus according to claim 1, wherein the mixed liquid tank is provided with an upper limit liquid level sensor and a lower limit liquid level sensor. 6. The liquid mixing apparatus according to claim 1, wherein tap water is used as the second liquid pressure supply unit.