JP3435657B2 - Metering suction and discharge device for simultaneous metering and discharging of multiple liquids - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metering suction / discharge device. More specifically, the present invention relates to a device having a function of measuring a plurality of liquids or fluids in different amounts or the same amount and discharging them simultaneously.

[0002]

2. Description of the Related Art In general, a metering intake / discharge device for a liquid or a fluid is often composed of a combination of a rotary valve (1) and a metering piston (2) as shown in FIG. In order to suck and discharge a plurality of liquids or fluids simultaneously, it is necessary to prepare a plurality of sets of these devices or perform suction and discharge sequentially by switching valves. Therefore, the number of weighing increases, the error is accumulated,
There was a problem that the filling amount of the final product could be different. Therefore, the applicant has already filed Japanese Patent Application No. 4-1851.
No. 80 has applied for a new weighing device. This device is composed of a valve and a piston pump, and comprehensively measures the second and third objects to be measured by the first metering device. By using this device, the problem of large measurement error could be solved.

However, when the metering and filling operation is performed by the piston via the rotary valve, the fluid is left inside the valve due to the switching operation of the rotary valve, and the fluid is mixed when the next fluid is metered. There is. That is, as shown in the schematic diagram of the state of each shot when the liquid is switched using the rotary valve in FIG. 9 to measure and fill, the liquid is exchanged between shots at each discharge. This is a problem because it is not possible to fill a metered (counted) product in each metering shot unit particularly in a discontinuous fluid in which a liquid contains a solid substance. Furthermore, as the number of types of objects to be weighed increases, switching of the valve of the stored solution equipped with a rotary valve leads to an extension of the weighing time when weighing each. Japanese Unexamined Patent Publication No. 60-77807 discloses a metering / discharging device in which a rotary valve and a piston are combined, and Japanese Unexamined Patent Publication No. 63-6752.
Japanese Patent Publication No. 4 discloses a device for supplying a liquid to a mixing head having two cylinders. These inventions have not solved the above problems.

[0004]

[Problems to be Solved by the Invention]
A device for measuring and discharging a plurality of liquids or fluids, and a device for measuring and sucking and discharging a plurality of liquids by switching a rotary valve is not always satisfactory. In particular, when a plurality of liquids are metered out, a problem is that a plurality of liquids or fluids are mixed in the valve. The present invention is a metering suction / discharge device equipped with such a rotary valve, capable of metering and discharging a plurality of objects to be measured in a short time, and moreover, the amount of liquid or fluid that remains in the rotary valve is different. The purpose is to obtain a device that does not cause the measurement error of.

[0005]

The present invention provides the following apparatus in order to achieve the above objects. That is, a storage container for storing the metered discharge, a first metering suction / discharge device configured by a switching valve connected to the discharge port of the storage container and pump means, and a configuration similar to this metering suction / discharge device are provided. Other measuring suction and discharge device that has
A metering intake / discharge device connected to a discharge pipe following the discharge port of the first metering intake / discharge device, wherein the driving of the pump means connected to each storage container and the operation of the switching valve are interlocked, and The measuring and sucking / discharging device that discharges and stacks the measured and discharged substances in a discharge pipe following the discharge port of the first measuring and sucking and discharging device, and measures and discharges the stacked measuring and discharging substances by the discharging operation of the first measuring and sucking and discharging device. In such a device, the measuring operation of the other measuring suction / discharge device communicating with the discharge pipe of the first measuring suction / discharge device is arbitrarily changed, and the change amount is replenished by the first measuring discharge device, It constantly discharges a fixed amount,
Further, the metering operation of another metering intake / discharger communicating with the discharge pipe of the first metering intake / discharger is arbitrarily changed by a signal from a counting sensor installed in this metering intake / discharger.

[0006]

In the discharge pipe of the first metering suction / discharge device, which is composed of the storage container for storing the metered discharge, the switching valve connected to the discharge port of the storage container, and the pump means, the first metering device is provided. The discharge ports of other measuring suction / discharge devices having the same structure as the suction / discharging device are connected, and the driving of the pump means of each storage container and the operation of the switching valve are interlocked with each other to measure the measured discharge amount in each storage container. The first measuring suction and discharge device is configured to discharge and stack in the discharge pipe, and the stacked measuring and discharging substances are measured and discharged by the discharging operation of the first measuring suction and discharge device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is to drive a pump means connected to each storage container by connecting the discharge port of another metering intake / discharger to the discharge pipe serving as a storage part of the metering discharge liquid of the first metering intake / discharger. The object to be filled (measured discharge) in each storage container can be stacked in the discharge pipe in conjunction with the operation of the switching valve, and the stacked measured discharge is stored in the first measuring suction / discharge device. It is characterized in that it is discharged by the discharging operation of. In order to better understand the present invention, the embodiment exemplifies a device for metering and discharging two kinds of liquids,
I will explain. An apparatus for metering and discharging two kinds of liquid has a configuration shown in FIG. (7) is a portion for stacking and storing the measured liquid to be filled, which may be a pipeline or a container, but has a capacity for storing the measured liquid discharged by another measuring device. is necessary. One end of (7) is connected to the switching valve of (5), and the switching valve (5) is connected to the pump means of (6) and the storage container (4) containing the liquid A to be measured. . The pump means of (6) has a mechanism for measuring and discharging the liquid A to be measured in the storage container of (4), and performs the main discharging operation. A second switching valve (10) is provided in the pipeline (1) at the portion for storing the measured discharge liquid of (7).
3), and the storage container (9) for the second liquid B to be measured and the second pump means (11) are connected to the switching valve (10).

If necessary, various sensors (12) can be installed in the pipeline (13) connected to the switching valve (10) and the storage container (9). For example, if the liquid to be measured is a mixture of solids and liquids, a counting sensor that counts the number of solids can be installed to perform counting. As such a sensor, an optical sensor, a pressure sensor and the like are typical, but other sensors can also be used. For such a sensor, the method already filed by the present inventor as Japanese Patent Application No. 5-194451 can be used. The method allows a fluid containing a solid substance to pass through a pipe that is deformable, has a restoring force, and has an inner diameter smaller than the short diameter of the solid substance, and detects the deformation of the pipe due to the solid substance during the passage. This is a method of identifying solids in the fluid. In this way, the measured discharge liquid storage site (7)
A storage container for measuring a plurality of liquids to be measured, a measuring piston, and a switching valve can be connected to the. By installing a combination of a plurality of storage containers, a metering piston, and a switching valve, it becomes possible to meter and discharge a plurality of liquids to be measured simultaneously.

The movement of the rotary valve as the switching valve and the absorption and discharge movement of the piston are controlled so as to be interlocked with each other in accordance with the target amount of the measuring liquid. Even in this case, it is possible to perform accurate weighing. In addition, each can be pre-programmed for sequence control. The movement of the rotary valve and the suction / discharge movement of the piston may be controlled by using a cam or air control.
Such valves and pistons can be freely used to construct the present invention as long as they are commercially available devices. A discharge valve (8) is provided at one end of the measured discharge liquid storage part (7), and after the suction measurement of the target liquid is completed, the discharge port is opened by the operation of the valve (8),
The main metering piston pumps and discharges the metered liquid in the storage part.

The operation of the present invention is specifically shown in FIGS. Although the drawing shows a case where two kinds of liquids are sucked and discharged, the same operation is performed even when two or more kinds of liquids are filled. Liquid A in the storage container (4) of FIG. 1 is added to liquid B10 in the storage container (9).
A case will be described in which ml is weighed and discharged so that the total amount becomes 100 ml. (Standby State) FIG. 1 shows a standby state before the start of weighing. Switching valve (5)
Is connected to the pump means (6) and the storage site (7),
The pump means (11) sucks the liquid B in the storage container (9) and puts the liquid B in the storage container (9) into the pipeline (13).
Has been satisfied. (Measurement start) At the same time when the switching valve (5) rotates and the pump means (6) starts suction (measurement) of the set amount (100 ml),
The pump means of (11) supplies the liquid B in the storage container (9) to 10
The liquid B moves so as to push out, and the liquid B is pressure-fed to the measured discharge liquid storage site (7) and moves. The state of FIG. 2 shows the position of the valve, valve and piston in this starting state.

(Measurement) The pump means (6) measures 10 m of the liquid B in the storage container (9).
l and liquid A in the remaining storage container (4) are combined to 100 m
Weigh until it reaches 1. The switching valve (10) is the liquid B.
After the completion of the extrusion of 10 ml, it is rotated to the side of the storage container (9) to prepare for the measurement of the liquid B. This is shown in FIG. (Measurement complete) FIG. 4 shows a state in which all the measurements are completed. (Discharge) The switching valve (5) is rotated, the discharge valve (8) is opened, the pump means (6) is moved, and the metered liquid stored in the metered discharge storage part (7) is pushed out. Further, during this step, the pump means (11) is sucked, and the liquid B in the storage container (9) is sucked (FIG. 5). The movements of a series of valves, valves and pistons are interlocked in advance according to the amount to be measured.

An example in which the yogurt with pulp of whole strawberries is metered out using the apparatus of the present invention is shown below. The yogurt containing the whole strawberry pulp was thoroughly mixed so as not to damage the strawberry pulp to prepare a final blended product. next,
Although not shown in the figure, a yogurt containing pulp is separated by using a separating device (using a solid content adjusting device described in Japanese Patent Application No. 4-219833), only 50 parts of the liquid portion and the remaining portion containing the pulp. Separated into 50 parts. Using the apparatus shown in FIG. 1, the liquid portion was placed in the storage container (4) and the remaining portion containing pulp was placed in the storage container (9). A total of 150 ml of yogurt with pulp is filled in a container. From the storage container of (9), the solids counting sensor of (12) (Japanese Patent Application No.
(Using the sensor described in 194451), the pump means (11) was set to stop when the number of pulp reached 5. The pump means (11) instantaneously stops the supply according to a command from the counting sensor (12), and when the set number is not counted within a predetermined time, the supply amount of the pump means (11) is stopped at 150 ml, I tried to give an alarm. At this time, the suction amount of the pump means (6) is entirely measured by the pump means (11) of the storage container (9). When counting and feeding solids, as in the case of yogurt with pulp, pump means (1
The amount of the fluid extruded from 1) changes depending on the distribution of the solid matter, and therefore does not become a constant amount and always changes. In such a case, the fluid to be filled, which is stacked on the discharged matter storage portion (7), needs to be discharged (filled) in the same shot. As shown in FIG. 6A, the filling target fluid stacked in the discharge storage part (7) is filled with a total amount of 150 ml by the pump means (6) in the discharging (filling) step.
It is pushed out by the minute. At this time, since the filling target fluid pushed out in the previous discharging step remains between the confluence point (a) of the fluid measured by another measuring suction and discharge device and the discharge valve (8), the discharge bellb From (8), the fluid to be filled previously is discharged (filled) first. Therefore, unless the internal volume between the confluence point (a) and the discharge valve (8) is multiplied by the total filling amount integer n (n = 0, 1, 2, ...),
As shown in b of FIG. 6, the filling target fluid stacked in the discharge storage part (7) is divided into front and back shots. Therefore, when the filling target fluid contains solids and the like, the counting was performed. It is not preferable because the number of solids causes variation.
Most preferably, the inner volume between the confluence point (a) and the discharge valve (8) is set to zero. When the internal volume of the device cannot be set to 0 due to restrictions such as installation location, it is preferable to make it an integral multiple of the total filling amount. In the case of FIG. 6 and a in the figure, the internal volume between the confluence point (a) and the discharge valve (8) is 150 ml, which is an integer (n = 1) times the total filling amount, and is measured (counted).
The shot and discharge (filling) shot match. In the case of b, the internal volume between the confluence point (a) and the discharge valve (8) is 50 ml, which is not an integral multiple of the total filling amount.
Even in the case of the same example of the distribution of solids as in the above case, the number of solids is 2 because the measurement shot and the discharge shot are misaligned.
There are 8 variations. The yogurt containing pulp was continuously filled into 100 containers by the apparatus of the present invention, and then the filling volume and the amount of pulp were measured, but all were correctly filled. FIG. 7 shows the movement state of the valve and the piston cylinder when the continuous metering and discharging operation is performed. The operation is performed in the same manner as described above, and is performed in the order of a to f.

[0013]

According to the present invention, a pump in which the discharge port of another metering suction / discharger is connected to the discharge pipe of the first metering suction / discharger which serves as a storage part for the metering discharge liquid, and is connected to each storage container. The drive of the means and the operation of the switching valve can be interlocked to stack the objects to be filled in the respective storage containers in the discharge pipe, and the stacked measured discharges of the first measuring suction / discharge device. Since it is designed to be discharged by the discharging operation, a plurality of fluids,
Alternatively, the liquid can be discharged accurately. Further, the drive of the pump means connected to each storage container and the operation of the switching valve can be interlocked to stack the objects to be filled in the respective storage containers in the discharge pipe, so that a plurality of fluids or liquids can be measured. In doing so, it is possible to prevent the movement between shots that has occurred, and it is possible to accurately supply to the filling device regardless of the amount remaining in the switching valve that causes a measurement error. Further, even if the metering operation of another metering intake / discharger is arbitrarily changed due to the existence of the discharge tube serving as a storage part of the metering discharge liquid, the change amount is replenished by the first metering intake / discharger, and the discharge tube is discharged. Therefore, the total amount can be accurately filled even if the liquid containing solid matter, for example, the solid matter of a liquid such as yogurt containing pulp changes every time. However, by providing the rotary valve as the switching valve, it is possible to measure and discharge a plurality of objects to be measured in a short time.

[Brief description of drawings]

FIG. 1 shows a conceptual diagram of the configuration of the present invention.

FIG. 2 is a schematic diagram showing a relationship among a liquid, a valve, a valve, and a piston cylinder during a metering operation by the device of the present invention.

FIG. 3 is a schematic view showing a relationship among a liquid, a valve, a valve, and a piston cylinder at a stage when the measurement of a small amount of a measurement object is completed during the measurement operation of the device of the present invention.

FIG. 4 is a schematic diagram showing a relationship among a liquid, a valve, a valve, and a piston cylinder at a stage when the measurement of the object to be measured is completed during the measurement operation of the device of the present invention.

FIG. 5 is a schematic diagram showing the relationship between the liquid, the valve, and the valve piston cylinder at the discharge stage after the measurement of the measurement object is completed during the measurement operation of the device of the present invention.

FIG. 6 is a schematic diagram showing a discharged state of a filling target fluid of the device of the present invention.

FIG. 7 is a schematic diagram showing the synchronization of a valve and a valve and a piston in continuous operation of the device of the present invention.

FIG. 8 shows a schematic view of a metering and discharging device in which a rotary valve and a piston cylinder are combined.

FIG. 9 is a schematic diagram showing a mixed state of two kinds of liquids when measured and discharged by a measuring and discharging device in which a rotary valve and a piston cylinder are combined.

[Explanation of symbols]

1 rotary valve 2 Measuring piston 3 storage containers 4 Storage container 5 switching valve 6 pumping means 7 Measured waste storage area 8 discharge valve 9 Storage container 10 Switching valve 11 Pumping means 12 sensors

Claims (3)

(57) [Claims] 1. A storage container for storing a metered discharge, a first metering suction / discharger configured by a switching valve connected to a discharge port of the storage container and pump means, and the same as this metering suction / discharger. Other measuring suction and discharge device having the configuration of
A metering intake / discharge device connected to a discharge pipe following the discharge port of the first metering intake / discharge device, wherein the driving of the pump means connected to each storage container and the operation of the switching valve are interlocked, and Of the measured and discharged substances are stacked in a discharge pipe following the discharge port of the first measuring and sucking device, and the stacked measuring and discharging substances are measured and discharged by the discharging operation of the first measuring and sucking device. A metering suction / discharge device characterized by the above. Wherein the first metering suction extraction device of another metering suction extraction device metering operation in communication with the discharge pipe changed arbitrarily, the first meter
Supplemented with the amount of change by an amount suction extraction device, always weighing suction extraction device according to claim 1, wherein the metering discharging a certain amount. 3. The metering operation of another metering intake / discharger communicating with the discharge pipe of the first metering intake / discharger is arbitrarily changed by a signal from a counting sensor installed in the metering intake / discharger. The measuring suction and discharge device according to claim 1 or 2.