JP2593082B2 - Two-liquid mixing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a two-liquid mixing apparatus for mixing and discharging a first liquid and a second liquid at a fixed ratio, and relates to water and water used in plant cultivation. It is used for producing a disinfecting solution with a chemical solution or for producing gasoline mixed with gasoline and lubricating oil.

[Conventional technology]

Conventionally, as a device that mixes two liquids at a fixed ratio, a device generally used is a first liquid that sucks and discharges a first liquid.
A liquid pump and a second liquid pump for sucking and discharging the second liquid are provided, respectively, and the first and second liquid pumps are driven by respective driving sources.

Specifically, there are those using an electromagnetic device that electrically drives each drive source, those using pulsating negative pressure of an internal combustion engine, and those using rotation from the output shaft of the engine, The drive source of each liquid pump is selected from among them.

[Problems to be solved by the invention]

Such a conventional two-liquid mixing apparatus has the following problems.

The driving source of each liquid pump is prepared for each pump, and it is difficult to always obtain a mixed liquid having a constant mixing ratio.

For example, in an internal combustion engine, a driving source as a first liquid pump for gasoline uses a pulsating pressure generated in the engine, and an output shaft of the rotation of the engine is used as a driving source as a second liquid pump for lubricating oil. .

According to this, the discharge amount of the first liquid pump is determined by the pulsating pressure of the engine, the discharge amount of the second liquid pump is determined by the output of the engine, and the mixing ratio of the two liquid pumps is determined by the driving device of each liquid pump. Related to

That is, regardless of the actual discharge amount of the first liquid pump, the second
Since the discharge amount of the liquid pump is determined, it is difficult to obtain a constant mixing ratio.

As described above, it is necessary to separately prepare the drive sources of the respective pumps, which undesirably increases the cost of the entire apparatus.

[Means to solve the problem]

The two-liquid mixing apparatus according to the present invention has been made in view of the above-mentioned problems, and an object thereof is to provide the above-described apparatus which can always mix two liquids at a constant mixing ratio. In order to achieve the purpose, it is as follows.

That is, a partition that divides the device main body into a sealed first air chamber and a second air chamber; a reciprocating rod that operates synchronously with the partition; and an opening in a valve chamber that is bored in the device main body. When the first liquid inflow path and the first air chamber communicate with each other, the first state in which the first liquid discharge path and the second air chamber communicate with each other, and when the first liquid inflow path communicates with the second air chamber, A switching valve device that instantaneously switches between a first state in which the first liquid discharge path communicates with the first air chamber to one of the states when the partition moves by a predetermined stroke; and a second liquid that is reciprocated by a reciprocating rod. A second liquid pump that sucks and discharges the first liquid. The first liquid discharge path is connected to a suction side of the first liquid pump that sucks and discharges the first liquid, and a second liquid discharge of the second liquid pump. The passage is connected to the liquid passage of the first liquid pump.

[Action]

When the first liquid pump operates and the liquid negative pressure of the first liquid pump acts on the first liquid discharge path, the negative pressure is introduced into the second air chamber via the switching valve device, while the first air chamber is It is connected with the 1st liquid inflow way via a switching valve device. According to this, the partition body moves toward the second air chamber due to the pressure difference between the first air chamber and the second air chamber. Therefore, the reciprocating operating rod moves to one side. According to this, the pump chamber of the second liquid pump is compressed and discharges the second liquid in the pump chamber to the fluid flow path of the first liquid pump.

Then, when the reciprocating operating rod moves to one side of the fixed stroke, the switching valve device is instantaneously operated, and the first liquid discharge path is communicated with the first air chamber by the switching valve device.
On the other hand, the first liquid suction passage is connected to the second air chamber.

According to this, the partition moves to the first air chamber side due to the pressure difference between the first air chamber and the second air chamber, and the reciprocating rod also moves to the other side. According to this, the pump chamber of the second liquid pump expands and sucks the second liquid into the pump chamber to prepare for the next discharge.

Thereafter, by repeating this, the first liquid pump,
The second liquid pump is operated so that the first liquid and the second liquid can be mixed at a certain ratio.

〔Example〕

Hereinafter, an embodiment of the two-liquid mixing apparatus according to the present invention will be described with reference to the drawings.

1 is an apparatus body provided with a concave portion 2 at one end thereof,
A partition 4 such as a diaphragm is disposed between the cover 3 and the cover 3 disposed on the concave portion 2. The partition 4 and the cover 3 form a closed first air chamber 5, and the partition 4 and the recess 2 form a closed second air chamber 6.

A reciprocating operating rod 7 is integrally attached to a substantially central portion of the partitioning body 4. A part of the reciprocating operating rod 7 is slidably supported by the apparatus main body 1, and its end is used as an output shaft. It protrudes from the apparatus main body 1. Further, by providing a small diameter portion on the reciprocating rod 7, pressing step portions 7A and 7B are provided.

A hole A is drilled on the outer periphery of the reciprocating rod 7 in the apparatus main body 1 so as to be concentric with the reciprocating rod 7. A seal member 8 that holds and seals the hole A hermetically is arranged, thereby forming the hole A as a valve chamber 9. Then, the next flow path opens in the valve chamber 9.

That is, reference numerals 10A and 10B denote first liquid inflow paths, which are respectively opened at both ends of the valve chamber 9 on the respective seal member 8 side. In this example, one first liquid inflow path 10A is
The liquid inflow path 10B branches.

Then, a first flow path 11 and a second flow path 12 are opened in the valve chamber 9 inward from the first liquid inflow paths 10A and 10B, respectively, and the other end of the first flow path 11 is connected to the first air chamber 5. And the second flow path 12 is connected to the second
It is opened to communicate with the air chamber 6.

Further, a first liquid discharge path 14 is opened on the center side of the opening of the first flow path 11 and the second flow path 12 to the valve chamber 9.

A valve 13 guided by the reciprocating rod 7 is disposed in the valve chamber 9. The valve 13 will be described below.

That is, the inner diameter of the valve body 13 is the larger diameter of the reciprocating operating rod 7.
Small holes 13A, 13A in which 7C is slidably held, and large holes 13B having a diameter larger than the small holes 13A, 13A and 13B.
Are continuously provided at the locking step 13C.

Therefore, the large hole 13B of the valve body 13 and the small-diameter portion 7
An annular gap B is formed between D and D.

On the other hand, at both ends of the outer periphery of the valve body 13, valve portions 13D, 13D that are in sliding contact with the inner wall of the valve chamber 9 are arranged, and both the valve portions 13D are provided.
13D is connected to the first cam portion 13E having a smaller diameter than the valve portion 13D. Therefore, a gap is always formed between the outer periphery of the first cam portion 13E and the valve chamber 9. The first cam portion 13E has a large-diameter portion 13F at an intermediate portion thereof, and small-diameter portions 13G are connected to both ends thereof by inclined locking step portions 13H, 13H. And the valve body 13
The switching of each flow path by the valve portions 13D, 13D is performed as follows.

That is, the first liquid discharge passage 14 opens in the gap B at any position of the valve body 13 and the first liquid inflow passage
Not communicated with 10B, 10A. When the valve element 13 is at one end of the valve chamber 9, the first liquid inflow path 10A is connected to the first flow path 11 via the valve chamber 9, and the first liquid discharge path 14 is formed into an annular gap B.
Is connected to the second flow path 12 via the (First liquid inflow passage 10
B is a first liquid inflow path 10A, a first liquid discharge path 14, a first flow path 1
1. Not communicated with the second flow path 12. On the other hand, when the valve element 13 is at the other end of the valve chamber 9, the first liquid inflow path 10B is connected to the second flow path 12 via the valve chamber 9, and the liquid discharge path 14 is connected via the annular gap B. To the first flow path 11. (The first liquid inflow path 10A is not connected to the first liquid inflow path 10B, the first liquid discharge path 14, the first flow path 11, and the second flow path 12.) A spring 15 is provided in the annular gap B. At both ends of the spring 15, seat plates 16, 16 that slide on the small-diameter portion 7D of the reciprocating rod 7 are arranged, and the seat plates 16, 16 are valve bodies. It comes into contact with the 13 locking step 13C.

Reference numeral 17 denotes a guide hole formed substantially in the same direction as the longitudinal axis of the reciprocating rod 7, in which the control rod 18 is movably disposed. The control rod 18 is integrally attached to a stay 19 extending from one end of the reciprocating operation rod 7, and has a large diameter portion 18A and small diameter portions 18B, 18C at both ends on the outer periphery of the control rod 18.
A second cam portion 19 is formed, which is formed with inclined stepped portions 18D and 18E connecting the large diameter portion 18A and the small diameter portions 18B and 18C.

Reference numeral 20 denotes a holding hole that connects the valve chamber 9 and the guide hole 17, and a ball 21 is rotatably disposed in the holding hole.
The diameter of the ball 21 is equal to the diameter of the large diameter portion 13 of the second cam portion 19.
When the ball 21 is arranged on the locking step 13H of the first cam portion 13E and F, it is determined that the ball 21 can urge a desired pressing force with respect to the valve body 13 in relation to the spring 15. You.

The switching valve device V is formed by the reciprocating operation rod 7, the valve body 13, the ball 21, and the control rod 18 described above. And
The first liquid discharge passage 14 is connected to the first suction side of the liquid pump P _1. The first liquid pump P ₁ is conventional, a motor which is commonly used, the engine of the pulsation pressure, driven by the output shaft.

The first liquid inflow passage 10A is connected to a first liquid storage tank T ₁ (for example, a gasoline tank) and the first liquid pump P
Is discharged from the discharge path C. Further, P ₂ is a second liquid pump, comprises the following arrangement.

That is, reference numeral 20 denotes a pump body, in which a cylinder chamber 21 'is bored, and a pump plunger 22 for increasing or decreasing the volume of the chamber is slidably disposed in the cylinder chamber 21'. Pump plunger 22 is reciprocating rod 7
Are integrally formed at the end of the. Also, the cylinder chamber 21 '
A second liquid inflow path 23 and a second liquid discharge path 24 are opened therein, and the second liquid inflow path 23 is provided in the second liquid storage tank T _2.
(For example, a lubricating oil tank), and the second liquid discharge path 24 is connected to the first liquid discharge path 14.

Incidentally, reference numeral 25 denotes a suction side check valve arranged in the second liquid inflow passage 23, and reference numeral 26 denotes a discharge side check valve arranged in the second liquid discharge passage 24.

 Next, the operation will be described.

FIG. 1 shows the original position where the reciprocating operating rod 7 has moved to the left end. In this state, the first liquid pump P ₁ , the second liquid pump P ₂ , the first air chamber 5, the second air chamber 6, The first and second flow paths 11 and 12, the valve chamber 9, the first liquid inflow paths 10A and 10B, the first liquid discharge path 14, and the second liquid inflow and discharge paths 23 and 24 are filled with respective liquids. You. These are the first and second liquid pumps P ₁ , P ₂
Of are those empty operation can be achieved by performing several times, in particular appreciated by second operation of the liquid pump P ₂ will be described later.

In this state, the output of the first liquid pump P ₁ is an external engine, when operated by pressure pulsation, the first liquid pump P ₁
A negative liquid pressure is generated by the flow of the first liquid on the suction side. This negative pressure is introduced into the second air chamber 6 through the first liquid discharge path 14, the annular gap B, and the second flow path 12.

On the other hand, the first liquid inflow path 10A is connected to the first air chamber 5 via the valve chamber 9 and the first flow path 11, and in this embodiment,
The first liquid inflow channel 10A is intended to be connected to the first liquid reservoir T _1, such as occurred in the first liquid discharge passage 14, a large becomes liquid negative pressure is not generated. (Usually, the upper part of the storage tank is open to the atmosphere.) Therefore, the first air chamber 5 and the second air chamber 6 sandwiching the partition body 4
And a pressure difference occurs. The first liquid inflow passage 10B is connected to the other first and second fluid passages by a valve portion 13D of the main valve body 13 that opens into the valve chamber 9.
Second flow paths 11, 12 and first liquid inflow path 10A, first liquid discharge path
Not connected to 14.

Therefore, the partition body 4 is located on the second air chamber 6 side (right side in the figure).
Start moving to. According to this, the reciprocating operating rod 7 and
The control rod 18 moves to the right in synchronization with the partition 4. Focusing on the control rod 18, the ball 21 is engaged with the small-diameter portion 18C of the second cam portion 19 and the locking step 18D of the control rod 18 in the state shown in FIG. By moving the rod 18 to the right, the ball 21 is moved to the large diameter portion 18 of the second cam portion 19.
Placed on A. At this time, the ball 21 is
Of the large-diameter portion 18A and the radius of the small-diameter portion 18C toward the valve chamber 9 due to the movement of the small-diameter portion 13G of the first cam portion 13E of the valve body 13. And the locking step 13H on the right side of the figure is pressed.

On the other hand, in the reciprocating operation rod 7, first, the pressing force is transmitted to the valve body 13 by the pressing step portion 7A pressing the seat plate 16 rightward. According to this, the second
As shown in the drawing, the ball 21 abuts on the locking step 13H of the first cam portion 13E in the initial rightward movement of the reciprocating rod 7 (moving about 2 mm in FIG. 1) from the state shown in FIG. During this time, the valve body 13 slightly moves to the right.

However, after this, even if the reciprocating lever 7 moves further rightward, the ball 21 is still in the second position.
Since it is on the large diameter portion 18A of the cam portion 19, it presses the right locking step 13H with a strong pressing force. On the other hand, the reciprocating operating rod 7
Is further moved rightward by the negative pressure in the second air chamber 6 irrespective of the pressing force.
Is transmitted from the pressing step 17A to the seat plate 16, and is achieved by the seat plate 16 pressing only the spring 15 to the right.

 Such a state is shown in FIG.

When the seat plate 16 presses the spring 15 and the valve body 13 does not move, the rightward pressing force of the spring generated by the pressing of the spring 15 is caused by the ball 21.
This is because the pressing force of the ball 21 on the locking step 13H is still large in relation to the pressing force on the locking step 13H.

In the state shown in FIG. 2, the valve chamber 9 of the valve 13
The opening and closing of the flow path that opens inside still retains the original state of FIG.

And, as described above, the movement of the valve body 13 is
Is temporarily stopped due to the spring force of the above, but the partition body 4 moves linearly rightward, and according to this, the first liquid in the second air chamber 6 is The valve chamber 9 is sucked into the first liquid pump P ₁ from the first liquid discharge passage 14, while the first air chamber 5 has the partition body 4 increasing the chamber volume, so that the first liquid storage tank T _{1 has} the first liquid storage tank T ₁ . One liquid is sucked into the first air chamber 5 via the first liquid inflow path 10A, the valve chamber 9, and the first flow path 11, to prepare for the next discharge step. (The first air chamber 5 is a pump suction step.) In the second liquid pump P ₂ , the pump plunger 22 compresses the cylinder chamber 21 ′ by the rightward movement of the reciprocating rod 7, According to this, the second liquid in the cylinder chamber 21 is supplied to the first liquid discharge path 14 through the second liquid discharge path 24.
To be discharged.

Thus since it is mixed in the vicinity of the first liquid pump P ₁ liquid first liquid discharge passage 14 to be supplied to the first discharge path C from the first liquid pump P ₁ mixture of the second liquid is supplied And this mixture is used in the equipment.

Next, when the partition 4 further moves, the second
The ball 21 is arranged in the small diameter portion 18B of the cam portion 19. According to this, the pressing force against the locking step 13H on the right side of the ball 21 is released.
The valve body 13 moves to the right at a stretch by the spring force of 15. The state immediately after moving to the right side of the valve body 13 is shown in FIG. In this state, the reciprocating operating rod 7, the second liquid pump
The time of the maximum stroke of the pump plunger 22 of the P _2.

Looking at the path switching state of the valve body 13 in this state, the first liquid discharge path 14 is connected to the first air chamber 5 via the annular gap B and the first flow path 11, and the first liquid inflow path 10B The second air chamber 6 is communicated via the valve chamber 9 and the second flow path 12.

According to this, the liquid negative pressure in the first liquid discharge path 14
The second air chamber 6 is introduced into the air chamber 5 and the first liquid inflow path 10
B, the valve chamber 9, a relatively weak negative pressure than the second flow passage 12 within the second liquid reservoir T ₂ is introduced.

Therefore, the partition body 4 starts moving from the right position in the figure to the first air chamber 5 side (left side). Then, the right pressing end portion 7B of the reciprocating rod 7 presses the seat plate 16, and applies a leftward pressing force to the valve body 13 via the spring 15.

In the initial stage of the movement of the reciprocating operating rod 7 to the left,
The ball 21 abuts on the left locking step 13H of the valve body 13 and is disposed on the large diameter portion 18A of the second cam portion 19 of the control rod 18. According to this, since the locking step 13H on the left side of the valve body 13 is regulated by the ball 21, the valve body 13 is held in the state shown in FIG. The reciprocating rod 7 moves to the left while pressing the seat plate 16, while the large diameter portion 18A of the control rod 18 moves to the left on the ball 21.

In such a state, the first liquid in the first gas chamber 5, the first passage 11, the valve chamber 9 and is sucked from the first liquid discharge passage 14 to the first liquid pump P _1. On the other hand, the second liquid reservoir by the pump plunger 22 is increased the volume of the cylinder chamber 21 by movement of the left direction of the reciprocating rod 7 in the second liquid pump P ₂
The second liquid in the T ₂ and sucked into the cylinder chamber 21 'in preparation for the next discharge step.

Further, in the second air chamber 6, the chamber volume of the second air chamber 6 is increased by the movement of the left of the partition body 4, whereby the first liquid in the first liquid storage tank T ₁ is The first liquid is sucked into the second air chamber 6 via the first liquid inflow path 10B, the valve chamber 9, and the second flow path 12 to prepare for the next discharge.

During this operation, the second liquid pump
The liquid is not ejected into the first liquid ejection path 14 and the second liquid is ejected once per reciprocating cycle of the reciprocating rod 7. However, since this cycle is relatively short, the liquid is ejected in the flow path. First
The second liquid is a sufficiently mixed liquid, which is not a problem.

 Such a situation is best illustrated in FIG.

When the partition 4 further moves to the left, the ball 21
Is disposed on the small diameter portion 18C of the second cam portion 19 of the control rod 18, and in this state, the valve 13
The lock of the first cam portion 13E with respect to the left locking step 13H is released, so that the valve body 13 moves at once to the left by the spring force of the spring 15 and returns to the original position shown in FIG. I do.

Reciprocating rod 7 reciprocated and second cycle of the liquid pump P ₂ is finished with a higher, since are those repeating this operation, the second liquid pump P ₂ is operated by the first driving liquid pump P ₁ Thus, mixing of the two liquids can be achieved. The moving speed of the reciprocating rod 7 from the original position to the second position and the returning speed from the second position to the original position, that is, the pumping action of the second liquid pump is a negative pressure generated by the suction of the fluid of the first liquid pump. Is determined by

Therefore, in the first small flow rate when the liquid pump P _1, second
The discharge of the liquid pump P ₂ also has a small flow rate, and the first liquid pump P ₂
At the time of large flow rate are those that can be also discharge of the second liquid pump P ₂ becomes a large flow rate, the first liquid with, the mixing ratio of the second liquid always constant.

That is, the discharge amount of the first liquid per one first liquid pump P ₁ is an amount that is discharged from the air chamber on one side by a one-way stroke of the partition body 4 to the first liquid pump P _1, second discharge rate of the second liquid per one liquid pump P ₂ is a pump plunger having the same stroke and the stroke of the partition body 4
22 is the amount discharged from the cylinder chamber 21 'by one-way stroke, and is always
Since the movement amount and the movement stroke with the liquid 22 are synchronized and the same, the mixing of the first and second liquids can be kept constant.

In the embodiment shown in FIG. 5, a plurality of pump chambers 30A and 30B are provided before and after the pump plunger 22 by a pump plunger 22 disposed in the cylinder chamber 21, and a second liquid inflow passage 23 is provided in each pump chamber. And the second liquid discharge passage 24 is opened. According to such a structure, the first liquid is supplied from the pump chambers 30A and 30B to the first liquid in response to the respective discharge steps of the first and second air chambers 5 and 6. It can be mixed in a liquid, and can further mix two liquids.

Also, the first discharge portion of the liquid in the second liquid by the second liquid pump P _2, may be open to any part of the channel in which the first liquid flows, but the first suction liquid pump P ₁ Side or the first liquid discharge path 14, the first liquid pump P ₁
Since the mixing of the two liquids is promoted in the inside, a uniform mixed liquid can be obtained.

Furthermore, when contacting the first liquid inflow passages 10A and 10B,
Valve chamber 9, first and second flow paths 11, 12 formed in the apparatus main body,
Since the first and second air chambers 5 and 6 are mixed in the first liquid discharge passage 14, the mixing state can be improved, and when lubricating oil is used for the second liquid, the reciprocating operation in the apparatus is performed. The self-lubrication of the mechanical contact portions of the rod 7, the valve body 13, and the control rod 18 has been achieved, and the durability has been significantly improved.

Although the partition body of the present embodiment is a diaphragm, the effective receiving pressure can be increased by using a piston,
The device can be compactly assembled.

〔The invention's effect〕

As described above, according to the two-liquid mixing apparatus of the present invention, the amount of the first liquid fed to the first liquid pump is determined by the volume change of each air chamber due to the operation of the partition, and the first liquid is supplied from the second liquid pump to the first liquid pump. Since the amount of the second liquid supplied to the liquid is determined by the operation of the pump plunger by the operation of the partition, it is always possible to accurately supply a mixed liquid having a constant mixing ratio. Since it is determined only by the first liquid pump, the partition body and the second liquid pump can be operated synchronously in proportion to the operation of the first liquid pump, and the discharge amount of the first liquid and the second liquid pump The discharge amount can be completely synchronized. Furthermore, the second
Since the operating source of the liquid pump uses the fluid pressure of the first liquid pump, there is no need to provide a driving source for the second liquid pump, and the entire apparatus can be made compact and inexpensive.

[Brief description of the drawings]

1 to 4 are longitudinal sectional views showing the state of each operation of an embodiment of the two-liquid mixing apparatus according to the present invention, and FIG.
It is a principal part longitudinal cross-sectional view which shows the other Example of a liquid pump. DESCRIPTION OF SYMBOLS 1 ... Device body, 5 ... 1st air chamber 6 ... 2nd air chamber, 7 ... Reciprocating operating rod 9 ... Valve chamber 10A, 10B ... 1st liquid inflow path 11 ... 1st flow path, 12 second flow path 13 valve element 14 first liquid discharge path 15 spring 18 control rod 21 ball V V switching valve device P ₁ first liquid pump P ₂ … Second liquid pump 21 ′… Cylinder chamber 22… Pump plunger 23… Second liquid inflow path 24… Second liquid discharge path T ₁ … First liquid storage tank T ₂ … 2 liquid storage tank

Claims (8)

(57) [Claims] 1. A partition for dividing an apparatus main body into a sealed first air chamber and a second air chamber; a reciprocating rod which operates synchronously with the partition; a valve formed in the apparatus main body. A first state in which the first liquid discharge path and the second air chamber communicate with each other when the first liquid inflow path opening into the chamber and the first air chamber communicate with each other; and a first state in which the first liquid inflow path communicates with the second air chamber. A switching valve device for instantaneously switching between the first liquid discharge path and the second state in which the first air chamber communicates with the first air chamber during communication by a constant stroke of the partition body, and a switching valve device; A second liquid pump for sucking and discharging the second liquid; connecting the first liquid discharge path to a suction side of the first liquid pump for sucking and discharging the first liquid;
A two-liquid mixing device in which a second liquid discharge path of a liquid pump is connected to a fluid flow path through which a first liquid flows. 2. The two-liquid mixing device according to claim 1, wherein a second liquid discharge passage of the second liquid pump is connected to a flow path on a suction side of the first liquid pump. 3. The two-liquid mixing device according to claim 1, wherein the second liquid discharge path of the second liquid pump is connected to the first liquid inflow path. 4. The two-liquid mixing device according to claim 1, wherein said partition is formed as a diaphragm. 5. The two-liquid mixing apparatus according to claim 1, wherein said partition is a piston. 6. The two-liquid mixing device according to claim 1, wherein a pump plunger of said second liquid pump is formed integrally with a reciprocating rod. 7. A partition 4 disposed between an end of the apparatus main body 1 and the cover 3 and divided into a hermetically sealed first air chamber 5 and a second air chamber 6; A reciprocating operating rod 7 which operates integrally with the apparatus main body 1 and is movably supported by the apparatus main body 1; and a valve chamber which is concentrically formed on the outer circumference of the reciprocating operating rod 7 with a gap therebetween and hermetically sealed in the apparatus main body 1. 9; first liquid inflow passages respectively opened near both ends of the valve chamber 9;
10A, 10B; a first liquid discharge passage 14 in the valve chamber 9 which is opened at a substantially intermediate position between the first liquid inflow passages 10A, 10B; A first flow path 11; a second flow path 12 connecting the valve chamber 9 and the second air chamber 6; a first liquid inflow path 10A which is arranged on the outer periphery of the reciprocating operating rod 7 and is inside the valve chamber 9; A first state in which the first liquid discharge path 14 and the second flow path 12 communicate with each other at the time of communication between the first liquid discharge path 14 and the first flow path 11;
At the time of communication between the first liquid inflow path 10B and the second flow path 12, the state is switched to one of the second states in which the first liquid discharge path 14 and the first flow path 11 are communicated, and Sliding contact valve part 13D,
13D is provided on the outer periphery of both ends thereof, and the valve portions 13D, 13D are further provided.
The outer diameter of the middle part of the valve part 13D, smaller diameter than 13D,
A valve body 13 having a first cam portion 13E in which a large diameter portion 13F and a small diameter portion 13G are connected via locking step portions 13H, 13H, respectively; a cylindrical large hole 13B of the valve body 13; In the annular gap B with the outer periphery of the small-diameter portion 7D of which the both ends correspond to the locking steps 13C, 13C provided in the annular gap B of the valve body 13 and the reciprocating operation rod 7 A spring 15 which is made movable and is contracted via seat plates 16, 16 respectively corresponding to the pressing steps 7A, 7A of the reciprocating operating rod 7; It moves synchronously with the operating rod 7 and has a large-diameter portion 18A and a small-diameter portion 1 on its outer periphery.
A control rod 18 having a second cam portion 19 for connecting each of the control rods 8C with respective locking step portions 18D and 18E, between a first cam portion 13E of the valve body 13 and a second cam portion 19 of the control rod 18; A switching valve device V comprising a ball 21 arranged so as to prevent the reciprocating rod 7 from moving in the reciprocating direction, and a cylinder chamber 21 slidably disposed in the cylinder chamber 21 '.
A pump plunger 22 for increasing or decreasing the volume inside 21 'is integrally disposed at the end of the reciprocating rod 7, and the second liquid inflow passage 23 and the second liquid discharge passage 24 are opened in the cylinder chamber 21'. a second liquid pump P _2; be more, said first liquid discharge passage inlet of the first fluid, with connecting to the first suction side of the liquid pump P ₁ for discharging, the second liquid pump P ₂ second liquid The discharge path 24 is connected to the first liquid pump P ₁
Two-liquid mixing device connected to the liquid flow path of the present invention. 8. The second liquid pump is connected to a cylinder chamber 21 '.
The pump plunger 22 placed inside the cylinder chamber
21 ′ is provided with a plurality of pump chambers 30 before and after the pump plunger 22.
The two-liquid mixing device according to claim 7, wherein each of the pump chambers (30A, 30B) has a second liquid inflow path (23) and a second liquid discharge path (24) formed therein.