JPS5853686A - Fluid pressure drive type constant quantity pump - Google Patents

Abstract

PURPOSE:To obtain a simple pump requiring no power supply for its operation by generating a predetermined fluid pressure when a main fluid system is connected to feed the fluid and by converting the fluid pressure into a reciprocating motion through piston mechanisms utilizing a diaphragm. CONSTITUTION:A fluid pressure control section 10 generating a predetermined fluid pressure, a fluid pressure drive mechanism section 12 provided with a pressure chamber 26 converting the fluid pressure into a reciprocating motion and piston mechanisms 30, 32, and a pump section 14 arranged with the piston mechanisms in a pump chamber 36 are provided. Then, a predetermined fluid pressure is generated and it is converted into a reciprocating motion. For instance, when the fluid flows into the control section 10, the flowed fluid pressure is increased under the action of a flow regulating valve 22, thus affecting the pressure chamber 26. Then, the piston 30 constituted in one body with a diaphragm 28 is displaced against a spring 34, and the piston 42 of the pump section 14 is proceeded into the pump chamber 36. In this case, if a predetermined in the chamber 36, the chemicals corresponding to the volume change in the pump chamber 36 due to the piston 42 is discharged through a discharge port 40 and is flowed into a liquid conveyance system.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention performs pump operation using the fluid pressure of a predetermined fluid transfer system in chemical plants, water and sewage facilities, food additives, etc. Other liquids (
This relates to an fc metering pump that injects #I & liquid, etc.).

Conventionally, as a device for injecting a fixed amount of chemical liquid etc. into a predetermined fluid transfer system, a metering pump such as a diaphragm type or a plunger type is used to measure the flow rate of the fluid transfer system and use a fixed amount injection pump such as a diaphragm type or plunger type based on the obtained 9ft lid control signal. Various devices are known that are configured to operate intermittently.

In addition, by combining a rotary flow meter and a magnetic drive control type switching valve device, it is attached to the body transfer system of the previous rotary nine-cap meter tH, and the flow M detection output shaft of this flow rate needle is The magnetic drive mechanism PC of the distribution valve device is connected, and the rotational movement of the t4tIIk detection output shaft is directly applied as the main force of the magnetic drive #jJJ mechanism, and the switching valve device is activated based on the appropriate ftt detection of the fluid transfer system. The switching operation is carried out without power supply, and the power is also 1 d.
In response to the switching operation of the pi-cut valve device, a diaphragm-operated bifurcated heavy pump that increases the fluid pressure of the main fluid transfer system is driven, thereby pumping the chemical liquid, etc. to the desired location without power supply. - A metering pump mechanism with proportional flow rate has been proposed.

The pump structure of this building is designed to reduce the amount of chemical liquid etc. compared to the predetermined flow rate when the fluid is in a continuous flow in the main fluid transfer system or when the fluid transfer time is long even if it is intermittent. It is extremely effective when performing injections. However, when the fluid in the main fluid transfer system is in an interrupted Id flow and the fluid transfer time is short, it is necessary to inject a predetermined amount of chemical liquid or the like each time the fluid is transferred. In particular, when the intermittent time is irregular and extends for a long time, such a demand increases. Therefore, the conventional pump mechanism described above is not effective in satisfying all of these requirements.

Therefore, the author, Akiyoshihiro, has conducted various studies in order to overcome the problems of the conventional devices mentioned above, as well as to create a metering pump that is simple and can operate without a power supply. It is simple if a predetermined fluid pressure is generated at the time of supply, this fluid pressure is converted into a forward J motion through a piston mechanism using a diaphragm, and a metering pump operation is performed under the fake action of the piston dA. (with a configuration of L)
We have also found that it is possible to obtain a fluid pressure-driven metering pump that performs reliable metering pump operation.

Therefore, the purpose of this book is to simplify the structure tζ, divide the intermittent fluid transfer of the main fluid transfer system, and maintain the appropriate flow rate for each predetermined amount of fluid transfer. An object of the present invention is to provide a fluid pressure-driven metering pump that can pump and supply a required fluid at a source.

In order to achieve the above-mentioned purpose, the present invention includes a fluid pressure control section that has a flow path connected to the main flow system and generates a certain amount of fluid pressure, and a fluid pressure control section that generates [7] the fluid pressure in this fluid pressure control section. It is characterized in that it is composed of a fluid pressure drive mechanism section that includes a pressure chamber that converts into reciprocating motion and a piston mechanism, and a pump section in which the piston +IAm is inserted into the pump chamber so that it can be freely encountered.

In the metering pump described above, the fluid pressure control section 91 includes a fluid inlet and a fluid outlet, and a flow rate regulating valve t-
In addition, it is preferable to provide a passage communicating with the pressure chamber of the fluid pressure drive mechanism between the flow rate regulating valve and the fluid inlet.

Further, a passage communicating with the outside may be provided in a part of the ft passage of the fluid pressure control section 04.

- 10,000, the fluid pressure section IIh mechanism section connects the pressure chamber to I! through the diaphragm. One four parts of the connecting rod are fixed to this diaphragm via a piston, and the other four parts of the connecting rod are fixed to the pump piston via a diaphragm. It is advantageous if a helical compression spring is provided.

Furthermore, a passage may be provided that communicates with the outside and a pressure chamber opposite to the unit on which the fluid pressure acts, which is defined by the diaphragm of the fluid pressure drive mechanism.

Further, it is preferable that the pump section includes a fluid suction port and a fluid discharge port, and a member that partially defines the volume of the pump chamber is provided in a portion of the pump chamber.

Next, the implementation of the present Shimei VCS fluid pressure driven metering pump will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a sectional view of essential parts showing an embodiment of a metering pump according to the present invention. In the embodiment shown in FIG. 1, the Hongenmei metering pump is composed of a fluid pressure control section 10, a fluid pressure drive mechanism section 12, and a pump section 14.

The fluid pressure control unit #10 includes a flow path 16 for connecting to a predetermined fluid transfer system, and this flow w! One end of 116 is configured as a fluid inlet 18 and the other end is configured as a fluid outlet 20. A flow rate regulating valve 22 consisting of a needle valve or the like is provided in a part of the flow path 16.
will be established. This tfLjtal regulating valve 22 and fluid inlet 1
In the wave path 16 between the
A passage 24fr communicating with a fluid pressure chamber of 2G' is provided.

- 10,000, the fluid pressure drive mechanism section 12 has a pressure fi26 in the center
A pump-driving diaphragm 28 is provided within this pressure chamber 26. −@ of the pump driving diaphragm 28
A pressure chamber formed on the surface is provided in the -ml fluid pressure control unit 10 and communicates with the fC passage 24, and is connected to the -ml diaphragm 28.
A piston 30 is attached to the other side, and a connecting rod 32 is fixed to be connected to a pump piston provided in the pump section 14, which will be described later. In addition, on the outer periphery of the front ml connecting rod 32,
A compression coil spring 34 is inserted between the piston 30 and the inner surface of the pressure chamber 26, and the pump driving diaphragm 28 is configured so that return elasticity acts on the pressure chamber side where fluid pressure always acts. 14 includes a pump chamber 36 and a fluid suction port 38 and a fluid discharge port 4 that communicate with the pump chamber 36, respectively.
0 is provided. A piston 42 is disposed in the pump chamber 66 so as to be movable forward and backward. This piston 42 has a pump chamber 56@
It is fixed to a diaphragm 44 provided for liquid-tightly sealing the pressure chamber 26 side and the pressure chamber 26 side, and also fixed to a connecting rod 32 provided in the front ml fluid pressure driven valve part 12. In addition, pump chamber 3
6 is provided with an adjusting member 46 for adjusting the volume of the pump chamber, ie, the pump discharge amount. Note that connecting members 48 and 50 are detachably attached to the fluid suction port 38 and the fluid discharge port 40 for communicating and connecting with an external system as appropriate, and a port valve is connected to these connecting members 48 and 50. Check valves 52 and 54 are provided, respectively.

In addition, in the above-mentioned embodiment, the fluid pressure tooth section 10, the fluid pressure section d diagonal section 12, and the pump section 14 are manufactured separately from the manufacturing constraints 1. ! L and others are fixed together.

Next, the operation of the pump constructed as described above will be explained.

First, the flow vF inlet 18 and the fluid outlet 20 of the fluid pressure # part 10 are connected to a predetermined fluid transfer system, and the fluid suction port 68 of the pump part 14 is connected to the chemical supply system, so that the fluid is supplied to the tool. Outlet 40! It shall be connected in communication with a part of the fluid transfer system.

Now, assuming that fluid flows into the fluid inlet port 18 of the fluid pressure control #s10, the inflow fluid pressure increases in the fluid Vi channel 16 under the action of the flow rate regulating valve 220. Therefore, a pressure chamber m (positive pressure) is generated in the channel 16 VC, and this pressure fluctuation acts on the pressure chamber 26 via the passage 24.

In this way, when a constant fluid pressure acts on the pressure chamber 26, the piston 3, which is integrally formed with the diaphragm 28,
0 is displaced against the elasticity of the compression coil spring 34, and causes the piston 42 of the pump section 14 to enter the pump chamber 66 via the connecting rod 32. In this case, when the piston 42 is in the retracted state, if a chemical liquid with a constant flow of f9r is held in the pump 'j
A predetermined amount of chemical liquid is injected into the fluid transfer system. In this case, a branch passage 56 that communicates with the outside is provided in a part of the passage 16 that communicates with the fluid outlet 20 of the fluid pressure control unit 10, and this passage 56 and the front a! 2 Fluid discharge port 4 of pump section 14
0 and 0, it becomes easy to ensure that the chemical solution is injected into the fluid transfer system.

Next, when the fluid supply to the fluid pressure part 10 is cut off, the predetermined fluid pressure acting on the pressure chamber 26 is forced, so the diaphragm 2B is caused by the cMM return force of the compression coil spring 34. It returns to the predetermined position together with the piston 30. When the piston 426 located in the pump chamber 66 moves back to its normal position, the pump chamber 3
6 through the fluid suction port 38,
It leans toward the next discharge.

In this way, intermittently P) for the fluid pressure part 10
A metering pump operation is performed in the tjiinso part 14 on the basis of which one foot of fluid is applied. Also, this pump operation can be operated without electricity by using fluid pressure.The redundant pressure applied to this -H1 pressure wealth 26 is the same as that of the flow valve. 22 allows the moat fa14Ji. Also, foot-pump action 'f: Hombo part 14 to perform
The pump discharge certificate can be installed by changing the volume of the pump chamber 66 using the adjusting member 46.

In the case of Aj14, tAe system decoration part 10
Although the case has been described in which the fluid transfer thread is connected to a predetermined fluid transfer thread as part of the flow path of the fluid transfer thread, the fluid inlet 18 is closed and only the +5ie body outlet 20 is connected to the predetermined fluid transfer system. It is also possible to configure the pressure chamber 26 so that a predetermined pressure fluctuation (positive pressure) is applied to the pressure chamber 26 by communicating with a part of the pressure chamber 26 . In addition, the fluid inlet 18 and the fluid outlet 20 are all closed, and the pressure fluctuation (positive pressure) described above is
A passage 58 communicating with a chamber on the opposite side of the pressure chamber 26 where
(indicated by a broken line) and by communicating this passage 56 with a portion of a predetermined fluid transfer system that causes negative pressure fluctuations, the pressure fluctuations (negative pressure) of the fluid transport system can be handled similarly to the embodiment described above. A metering pump operation can be performed. In this case, the flow path 16 of the fluid pressure part 10 communicates with the atmosphere via the through hole 56 and is maintained at atmospheric pressure.

As is clear from the foregoing, the fluid pressure-driven metering pump of the present invention performs pump operation using pressure fluctuations in the fluid transfer system, and moreover, injects liquid medicine, etc. into the liquid transfer system that creates the pressure chamber wJ. Therefore, in order to properly operate the pump against pressure fluctuations, it is necessary to satisfy the following conditions.

When the pressure fluctuation (positive pressure) is Pl-, PxA>(BxP)+C...1 (1) When the pressure fluctuation (negative pressure) is ΔP1-, ΔP XA> (ΔP xB) −〇 −*−
* (2) Based on the pressure fluctuation, the cocoon 5 self-expression (1
), (It is preferable to allow the VC main pump to satisfy 2J'.

Next, let's look at the book-16, which has the complicated operating characteristics mentioned above.
Application example 4C of the clear fluid pressure driven metering pump will be explained.

FIG. 2 shows a main tAL body transfer thread t (1) which is transferred from a water storage tank 60 via a pump 62 and a metering pump 64 is installed on the discharge side of the main tAL body transfer thread t (1. It is.

That is, in this example, the fluid pressure control section of the metering pump 64 is configured as a part of the main fluid transfer system, and the metering pump 64 performs metering pump operation by the operation of the pump 62 that is intermittently driven, and the liquid medicine storage tank is From 66, a predetermined amount of drug solution can be injected into the main fluid transfer system.

The metering pump 64 of the present invention is connected to the main fluid transfer system similar to that shown in FIG. Fluid inlet 18
The pump 62 of the main fluid transfer system is connected to the fluid outlet 20 by blocking the
The structure is such that the discharge fluid acts on the discharge fluid. By configuring in this way, 1! A drug solution can be injected into the main fluid transfer system in the same way as in the example shown in Figure X2.

Figure 4 shows a main flow fluid transfer system similar to Figure 2, in which a metering pump 64 of the present invention is connected to the suction side of the pump 62. In this case, the fluid inlet 18 and fluid outlet 20 that serve as the fluid pressure control section of the metering pump 64 are closed, and the main fluid transfer system pump 62 is connected to the passage 58 communicating with the pressure chamber of the fluid pressure drive unit 04. Apply the suction fluid of 5
It weighed 41g. in this way? #K to accomplish
Therefore, the chemical solution can be injected into the main fluid transfer system similarly to the example shown in gzeg. In this case, the chemical solution is injected through the pump 62 of the main fluid transfer system.

FIG. 5 shows a modified application example of the metering pump 64 of the present invention, in which the water supply system is connected to a water tank 70tlC through an automatic valve 68, and the stored water is appropriately discharged from the water tank 70 through a pump 72. In the constructed main fluid transfer system, a metering pump 64 according to the present invention is connected between the automatic valve 68 and the water storage tank 70. In this example, the main fluid transfer system is connected to the metering pump 64 as in the example shown in FIG. When performing this, a drug solution can be injected into the main fluid transfer system.

Figure 'Mbd shows a further modified example of application of the metering pump 64 of the present invention, in which water is pumped from a water storage tank 76 configured to always store a predetermined amount of water via an automatic valve or a manual valve 78 by a head. The tiger main fluid transfer system is configured to supply water,
A metering pump 64 according to the present invention is connected thereto. With this configuration as well, it is possible to inject the medicinal liquid into the main fluid transfer system in the same way as the example shown in FIG.

As is clear from the various application examples described above, the fluid pressure-driven metering pump according to the present invention operates the metering pump by the action of fluid pressure for each intermittent flow in a main fluid transfer system that generates various types of intermittent flows. This allows for reliable injection of chemical solutions, etc. Therefore, the metering pump of the present invention can be suitably applied as a chemical liquid injection mechanism in floor-standing processing equipment such as trains and ships, flush kneading processing equipment, automatic dishwashing systems, various beverage vending machines, etc.

In particular, the metering pump of the present invention has a simple structure, so it can be manufactured at low cost, and since it operates without a power source, there is no need for maintenance, and the metering pump can operate with high precision over a long period of time. It has many advantages, such as being able to hold it in a strange and feminine manner.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts showing one embodiment of a fluid pressure driven metering pump according to the present invention, and FIGS. 2 to 6 are system diagrams showing various application examples of the metering pump of the present invention. DESCRIPTION OF SYMBOLS 10...Fluid pressure control part 12...Fluid pressure drive mechanism part 14...Pump part 16...Flow path 18...Fluid inlet 20...Fluid outlet 22...Flow rate #I4
Valve 24... Passage 26... Pressure chamber 28... Pump drive diaphragm 30... Piston 32... Connection rod 34...
Compression coil spring 36... Pump chamber 38...
・Fluid suction port 40...Fluid discharge port 42...Piston 44...Diaphragm 46...Adjustment member 48.50...Universal connection part 52.54...Check valve
56... Passage 58... Passage 60.70.76... Water tank 62.72... Pump Pro 4... Metering pump of the present invention 66... Chemical solution storage 9 6B... Automatic valve 74...
Level switch 78... Valve patent supplier Z Kogyo Co., Ltd. FIG, 1 FIG, 3 FIG, 4 FIG, 6

Claims (4)

[Claims] (1) Predetermined θ1 with flow path t connected to the main flow system
t, a fluid pressure control unit that generates body pressure; a body pressure sliding mechanism unit that includes a pressure chamber and a piston mechanism that converts the fluid pressure generated in the body pressure control unit into reciprocating motion; A fluid pressure-driven metering pump comprising a pump section in which a piston mechanism is inserted into a pump chamber so as to be movable forward and backward. (2) The fluid pressure control section # is equipped with a fluid inlet and a fluid outlet, and a flow rate regulating valve is provided in a part of the wave path.
! 141g1 The ridge fluid pressure movable metering pump according to claim 1, wherein a passage communicating with the pressure chamber of the fluid pressure part excitation mechanism is provided between the tIt path between the valve and the fluid inlet. (3) The fluid pressure part dynamic metering pump according to claim 1 or 2, wherein a passage communicating with the outside is provided in a part of the fluid pressure control part. (4) fK, the body pressure drive mechanism section defines a pressure chamber through a diaphragm, and fixes one end of a connecting rod to this diaphragm through a piston, and fixes the other end of the connecting rod through the diaphragm. Fluid pressure driven metering pump e5) Fluid pressure drive mechanism section, in which a pump piston is fixed, and a compression coil spring is provided on the outer periphery of the connecting rod to act in repulsion with fluid pressure. 4. A fluid pressure-dynamic metering pump with ml ridges as claimed in claim 4, further comprising a passage communicating between the pressure chamber defined by the diaphragm and the pressure chamber opposite to the side on which fluid pressure acts, and the outside. The fluid pressure-driven metering device according to claim 1fA, wherein the pump portion includes a fluid suction port and a fluid discharge port, and includes a member that defines a pump chamber volume in a part of the pump chamber. pump.