JPH1091245A - Liquid injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily and securely discharge an air bubble formed in a liquid feed pipe, extending from a discharge port to a liquid injection place, to the atmosphere. SOLUTION: This liquid injection device includes an intermittent operation type pump 1 which has a suction port 4 connected to a liquid storage tank at its lower part and a discharge port 5 at its upper part and is equipped with a main piping part 11 which has its lower end connected to the discharge port 5 when liquid in the liquid storage tank is supplied to the liquid injection place below the discharge port from the discharge port 5 through the liquid feed pipe 9 and has a 1st on/off valve 20 on the upper end side, a branch pipe part 12 which branches from an intermediate part of the main piping part 11 and where the liquid feed pipe 9 is connected, and a 2nd on-off valve 30 which is provided to the branch pipe part 12 or liquid feed pipe 9. Then the 2nd on-off valve 30 is closed and the 1st on-off valve 20 is opened to place the pump 1 in operation, thereby discharging air bubbles B in the main piping part 11 to the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid injection device, and more particularly, to a liquid injection device suitable for supplying a predetermined electrolytic solution to each element in a manufacturing process of a capacitor, a battery, and the like. It is.

[0002]

2. Description of the Related Art For example, an aluminum electrolytic capacitor or an electric double layer capacitor will be described. For this, a liquid injection device called a dispenser is used, an example of which is shown in FIG.

According to this, a plunger pump 1 capable of controlling a single discharge amount to a minute amount (for example, on the order of 0.005 ml) is used as a pump. As is well known, this type of plunger pump 1 has a pump body 3 in which a cylinder chamber 2 is formed. In this case, a suction port 4 is provided below the pump body 3 and a discharge port 5 is provided. Is provided on the upper part of the pump body 3.

In the suction port 4 and the discharge port 5,
Check valves 4a and 5a are provided to prevent backflow from the discharge port 5 side to the suction port 4 side. The suction port 4 is connected to an electrolyte storage tank (not shown) via the suction pipe 8, and the discharge port 5 supplies liquid to a liquid injection point (not shown) (for example, a metal case containing a capacitor element). The pipe 9 is connected.

[0005] The plunger 6 in the cylinder chamber 2 is reciprocated by a driving means 7 such as a solenoid, for example, so that a predetermined amount of electrolysis is performed from the nozzle at the tip of the plunger to the injection point via the liquid supply pipe 9. The liquid is supplied intermittently. That is, in FIG. 3, when the plunger 6 moves leftward, the electrolyte is sucked into the cylinder chamber 2 from the suction port 4, and when the plunger 6 moves rightward, an amount of the electrolyte corresponding to the movement stroke is discharged from the discharge port 5. Is done.

[0006]

In this case, the plunger pump 1 is disposed at a position higher than the injection point because the electrolytic solution is dropped into the metal case of the capacitor. Accordingly, a part of the liquid supply pipe 9 is bent in an inverted U-shape accordingly.

[0007] By the way, not only the electrolytic solution but also a slight difference in the liquid, the air is dissolved, and when the liquid is sent through a pipe, if the above-mentioned inverted U-shaped portion exists, Air appears as air bubbles in the part. In FIG. 3, the bubble is indicated by reference numeral B. When the bubble B grows, even if the plunger pump 1 operates normally, the discharge amount to the injection point is not constant, causing a characteristic change for a capacitor or a battery. Will be.

For this reason, conventionally, when the bubble B grows to some extent, the worker stops the process and then operates the plunger pump 1 at a high speed to discharge a large amount of the electrolyte so that the bubble B is forcibly forced. It is driven out of the liquid supply pipe 9. However, this takes not only a considerable amount of time but also wasteful consumption of the electrolytic solution, and an improvement in this regard has been desired.

In order to prevent this, the suction port 4 is provided on the upper part of the pump body 3 and the discharge port 5 is provided on the lower part of the pump body 3, and an inverted U-shaped part is However, even if the discharge port 5 is provided at the lower portion of the pump body 3 as described above,
This time, bubbles will accumulate near the discharge port 5, and the problem cannot be solved.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to quickly and surely discharge air bubbles generated in a liquid supply pipe from a discharge port to a liquid injection point to the atmosphere. It is an object of the present invention to provide a liquid injection device.

[0011]

According to the present invention, there is provided an intermittently operated pump having a suction port connected to a liquid storage tank at a lower portion and a discharge port at an upper portion. In a liquid injection device that intermittently supplies the liquid in the liquid storage tank to a liquid injection point located below the discharge port from the discharge port via a liquid supply pipe, a lower end is connected to the discharge port, and an upper end is connected to the discharge port. A main pipe part having a first on-off valve on the side, a branch pipe part branched from an intermediate part of the main pipe part and connected to the liquid supply pipe, and a branch pipe part or the liquid supply pipe. A second on-off valve provided, the second on-off valve is closed, the first on-off valve is opened, and the pump is operated to release the air stored in the main pipe portion to the atmosphere. It can be released to .

According to this, bubbles generated in the piping system from the discharge port to the liquid injection point stay at the upper end of the main piping portion at the highest position in the piping system. Therefore, by closing the second on-off valve and opening the first on-off valve to operate the pump, the air stored in the main pipe portion is immediately released to the atmosphere. After the release, the second on-off valve is opened, the first on-off valve is closed, and the pump is operated, so that normal liquid injection can be performed.

In this case, a liquid level sensor for monitoring the amount of accumulated air bubbles is provided at a position above the branch pipe section of the main pipe section, and the first on-off valve is an electromagnetic valve, and the first liquid level sensor is used for the first liquid level sensor. On-off valves can also be controlled.

The first opening / closing valve may be an electromagnetic valve, and the opening / closing of the electromagnetic valve may be controlled at predetermined intervals by a timer. In any case, when the first on-off valve is automatically controlled in this way, a check valve for preventing a backflow of the liquid in the liquid supply pipe is used as the second on-off valve.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, in order to better understand the technical concept of the present invention, a first embodiment of FIG. 1 and a second embodiment of FIG. 2 will be described. In each of these embodiments, the same plunger pump 1 as the conventional example of FIG. 3 described above is used.

First, in the first embodiment shown in FIG. 1, a main pipe portion 11 is provided which is connected to the discharge port 5 of the plunger pump 1, for example, in an upright state. This main piping section 1
Reference numeral 1 denotes a pipe member having a predetermined length, preferably a see-through pipe member, and a first on-off valve 20 is provided at an upper end side thereof.

According to this embodiment, the first opening / closing valve 20 is of a manual type, and the discharge port 2 communicating with the main pipe portion 11 is provided.
1 and a valve element 22 for opening and closing the discharge hole 21. In this case, the valve body 22 is composed of a rod slidably inserted into a through hole orthogonal to the discharge hole 21, and a part of the rod is provided at a predetermined sliding position of the rod.
A valve hole 22a is coaxially positioned. The valve body 22 is a normally-closed valve, and is urged rightward in FIG. 1 by a compression coil spring 23 so that the valve hole 22a is displaced from the discharge hole 21 in a normal state.

The main pipe section 11 has a branch pipe section 12 branched from an intermediate portion thereof. A liquid supply pipe 9 leading to a liquid injection point (not shown) is connected to the branch pipe section 12. In this case, a second opening / closing valve 30 is provided at a predetermined portion of the liquid supply pipe 9. In this embodiment, the second on-off valve 30 is a rotary cock commonly used. Note that the second on-off valve 30 may be a valve having the same configuration as that of the first on-off valve 20, but in this case, it is a normally open type.

In the above configuration, in order to inject an electrolyte into a liquid injection point, for example, a metal case in which a capacitor element is housed, the first opening / closing valve 20 is normally closed in this embodiment. , The plunger pump 1 is operated. As a result, an amount of the electrolytic solution corresponding to the movement stroke of the plunger 6 is intermittently supplied from the nozzle at the tip of the liquid supply pipe 9 to the capacitor element in the metal case.

In this case, in the piping system from the discharge port 5 to the injection point, the upper end of the main piping section 11 is at the highest position. It will collect at the top.

In the first embodiment, to remove the bubble B, the second on-off valve 30 is closed (cock is closed) and the valve body 22 of the first on-off valve 20 is compressed by the compression coil spring 2.
After the first opening / closing valve 20 is opened by sliding the valve hole 22a to the discharge hole 21 against the left side of FIG.

As a result, the air bubble B is transferred to the plunger pump 1
Is released into the atmosphere by the electrolytic solution pumped from the reactor.
In this case, the operating time of the plunger pump 1 is determined by the amount of one discharge. However, since it is sufficient to push out the air bubbles B, the operation time is extremely short as compared with the related art, and the waste of the electrolytic solution is reduced. Consumption can be minimized. Thereafter, in order to restart the injection of the electrolytic solution into the capacitor element, the first open / close valve 20 is closed and the second open / close valve 30 is opened to operate the plunger pump 1.

Next, a second embodiment of FIG. 2 will be described. In the second embodiment, when the bubble B has grown to some extent, the bubble is automatically removed.
1 and the branch pipe section 12 are made of, for example, a transparent synthetic resin block 40.
The synthetic resin block 40 is mounted on the upper portion of the plunger pump 1 so that the main piping section 11 and the discharge port 5 communicate with each other.

On the upper surface of the synthetic resin block 40, an electromagnetic valve 25 as a first on-off valve is provided. Solenoid valve 2
Reference numeral 5 denotes a valve element 27 which is reciprocally slid between an open position and a closed position by a driving means 26 such as a solenoid. The valve element 27 has a valve hole 27 communicating with the main pipe portion 11 at the open position.
a is drilled. FIG. 2 shows a state where the valve body 27 is in the closed position.

In the second embodiment, a check valve 31 is used as a second on-off valve, and the check valve 31 is
The electrolyte is provided so that the electrolyte in the liquid supply pipe 9 does not flow backward to the main pipe section 11 side. In the synthetic resin block 40, a liquid level sensor 50 for detecting the liquid level is provided above the branch point of the branch pipe section 12 of the main pipe section 11. The liquid level sensor 50 includes, for example, a light emitting element 50a and a light receiving element 50b, and may detect the liquid level based on the difference between the amount of light passing through the electrolyte and the amount of light passing through the bubbles B.

Also in the second embodiment, when liquid is injected into a capacitor element (not shown), the solenoid valve 25 is closed, and bubbles B accumulate at the upper end of the main pipe portion 11. When the liquid level of the liquid drops and is detected by the liquid level sensor 50, the electromagnetic valve 25 is controlled by the detection signal, and the valve body 27 slides to the open position (the left position in FIG. 2).

As a result, the main pipe portion 11 is opened to the atmosphere through the valve hole 27a, and the bubbles B are discharged into the atmosphere by the electrolyte fed from the plunger pump 1. Then, when the electrolytic solution in the main pipe section 11 rises and the liquid level is detected by the liquid level sensor 50, the solenoid valve 25 is returned to the closed position again by the liquid level detection signal, and Infusion will be resumed.

In each of the above embodiments, the electrolytic solution is injected into the capacitor element, but the present invention is not limited to this. Further, although the plunger pump is used as the intermittent operation type pump, other types of pumps may be used.

[0029]

As described above, according to the present invention,
For example, when injecting electrolyte into a capacitor element,
Bubbles generated in the piping system from the discharge port of the pump to the injection point (condenser element) are reliably discharged to the atmosphere in a short period of time while minimizing waste of the injected substance (electrolyte). can do.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a first embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a second embodiment of the present invention.

FIG. 3 is a cross-sectional view schematically showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plunger pump 2 Cylinder chamber 4 Intake port 5 Discharge port 6 Plunger 11 Main piping part 12 Branch pipe part 20, 25 First on-off valve 30, 31 Second on-off valve

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshihiko Yamazaki 2-2-1 Tsujido Shinmachi, Fujisawa City, Kanagawa Prefecture

Claims (4)

[Claims] 1. An intermittent operation type pump having a suction port connected to a liquid storage tank at a lower portion and a discharge port at an upper portion, and a lower portion than the discharge port via the liquid supply pipe from the discharge port. In a liquid injection device for intermittently supplying the liquid in the liquid storage tank to a liquid injection point located at a position, a main pipe portion having a lower end connected to the discharge port and having a first open / close valve on an upper end side; A branch pipe section branched from an intermediate portion of the main pipe section and connected to the liquid supply pipe, and a second on-off valve provided in the branch pipe section or the liquid supply pipe; A liquid injection device, wherein the on-off valve is closed, the first on-off valve is opened, and the pump is operated to release air stored in the main pipe portion to the atmosphere. 2. A liquid level sensor for detecting a liquid level in the main pipe portion at a position above the branch pipe portion of the main pipe portion, and the first on-off valve is provided with a liquid level sensor. The liquid injection device according to claim 1, comprising an electromagnetic valve controlled by: 3. The liquid injection device according to claim 1, wherein the first on-off valve comprises an electromagnetic valve whose opening and closing are controlled at predetermined time intervals by a timer. 4. The liquid injection device according to claim 1, wherein the second on-off valve comprises a check valve for preventing a backflow of the liquid in the liquid supply pipe.