JPS6121392A - Vacuum filler for liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application of i/1' Industry 1- The present invention relates to an improvement in a liquid vacuum filling device used for filling brake oil into a hydraulic brake system of an automobile or the like.

2. Description of the Related Art In conventional vacuum filling equipment for brake oil, etc., after vacuum suction is applied to the space to be filled with the liquid in the device to be filled, the brake is applied by a liquid supply circuit having a liquid supply pump that is completely separate from the vacuum suction system. It supplies and fills liquids such as oil.

Problems to be Solved by the Invention The brake oil described above is provided by the manufacturer in a completely sealed container such as a drum filled with nitrogen gas, and is filled into the equipment to be filled using the vacuum filling device described above.
With conventional filling means, while flowing through the liquid supply circuit, it comes into contact with the air remaining in the circuit, absorbs moisture, and contains microbubbles, and after filling, these moisture and air are separated, causing damage to the equipment being filled. may have a serious impact on its functionality.

Means for Solving the Problems As described in the claims, the present invention provides a liquid supply pipe in which a vacuum tank connected to a vacuum pump has a valve that is opened and closed by a first solenoid valve,
It is connected to a liquid container that allows only dry air to be introduced.
The liquid outlet of the vacuum tank is connected to the liquid supply pump by a liquid supply pipe having a valve opened and closed by a second solenoid valve, and is also connected to the vacuum of a liquid supply gun that can be brought into close contact with the filling port of the device to be supplied with liquid. By configuring the suction port to be in communication with the vacuum tank and the liquid inlet of the gun to be in communication with the liquid discharge port of the liquid supply pump, complete defoaming can be achieved without exposing the liquid to air. The container can be filled in a dehumidified state, and the liquid is sucked into the tank by the suction action of the vacuum tank, and the liquid is discharged by the liquid supply pump, thereby eliminating the need for a replenishment pump that pumps out the liquid from the liquid container.

The embodiment and its operational drawings are operational circuit diagrams of one example of implementation, and include a vacuum tank 1.
A vacuum pump 4 is connected by a vacuum line 3 having a separator 2.
is communicated with. Reference numeral 5 is a drive motor for the vacuum pump 4.

The vacuum tank 1 mentioned above is connected to the liquid container 7 by a liquid supply pipe, and the liquid in the liquid container 7 is transferred to the vacuum tank 1.
The suction negative pressure inside the vacuum tank l passes through the liquid supply pipe.
A valve 8, which is opened and closed by a first solenoid valve 5OLI, is inserted into this liquid supply pipe. Further, the solenoid valve 5QLl is inserted into a conduit lO connected to the pressurized air source 9, and opens and closes the valve 8 according to commands from a control device (not shown).

The illustrated liquid container 7 is supplied from the manufacturer in a sealed state filled with liquid and nitrogen gas, and the dry air that has passed through the dehumidifier 11 is sucked into the vacuum tank l as described above. and is supplied into the liquid container 7.

The liquid outlet 12 of the vacuum tank 1 is communicated with a liquid supply pump 15 through a liquid supply pipe 14 having a valve 13 that is opened and closed by a second solenoid valve 5OL2.

The valve 13 mentioned above is connected to a pipe line 16 connected to the pressure air source 9.
The solenoid valve 5OL2 opens and closes the valve 13 according to commands from a control device (not shown).

The liquid supply pump 15 in the illustrated example is a plunger pump,
It is operated by a solenoid valve 5QL3 inserted into a conduit 17 connected to the pressure air source 9 and turned on and off by a control device (not shown).

The liquid supply gun 18, which is in close contact with the filling port of the device to be supplied liquid (not shown), is equipped with a vacuum suction port 19, a liquid injection port 20, and a clamper 21 for the filling port. The port 19 communicates with the vacuum tank l through a vacuum line 22, the liquid inlet 20 communicates with the liquid discharge port 24 of the liquid supply pump 15 through a liquid supply pipe 23, and the liquid inlet 20 communicates with the liquid discharge port 24 of the liquid supply pump 15 through a liquid supply pipe 23.
1 is communicated with a conduit 26 which communicates with a pressure air source 25.

A valve 27 that is opened and closed by a solenoid valve 5QL4 is inserted into the vacuum pipe line 22 mentioned above.
The valve 27 is opened and closed in response to commands from a control device (not shown) inserted into the valve.

The above-mentioned liquid supply pipe 23 includes a solenoid valve 5OL5.
A solenoid valve 5OL5 is inserted into a conduit 30 connected to the pressure air source 25, and is opened and closed by a control device (not shown).
) Rev 29.

Open and close.

Further, a solenoid valve 5OL6 is inserted into the conduit 26 of the clamper 21, and the crank 21 is actuated by a command from a control device (not shown).

A vacuum conduit 32 in which a valve 31 is inserted communicates between the valve 29 of the liquid supply pipe 23 and the liquid inlet 2α, and the conduit 32 communicates with the vacuum tank 1. This valve 31 is connected to a pipe line 3 connected to the pressure air source 25.
The solenoid valve 5QL7 opens and closes the valve 31 according to a command from a control device (not shown).

1- The downstream region of the vacuum pipe 32 from the valve 31 is connected to a pressure switch 35 through a vacuum pipe 34. As will be described later, this pressure switch 35 detects when the device to be supplied with liquid is filled with liquid and a predetermined pressure is applied to the vacuum pipe line 34, and sends a detection signal to a control device (not shown). Enter.

Further, a vacuum switch 36 is inserted into the vacuum pipe line 22, and is configured to input a signal to a control device (not shown) when a predetermined degree of vacuum is reached.

Note that the reference numeral 37 in the figure is a pressure reducing valve.

The liquid vacuum filling device constructed as described above operates as described below.

That is, the vacuum pump 4 is activated, the vacuum tank 1 is brought to a predetermined degree of vacuum, and a certain amount of liquid is sucked and stored from the liquid container 7, and the plunger of the liquid supply pump 15 retreats into the cylinder. A certain amount of liquid is injected, each solenoid valve is set to 0FI7, and valve 8
is OFF, valve 13 is ON, valve 27, 29°31
is kept OFF and pressurized air is being supplied to the pressurized air source 9゜25, the liquid supply gun 18 is brought into contact with the filling port of the device to be supplied with liquid, and the solenoid valve 5OL6 is turned ON.
Then, the clamper 21 is operated to bring the liquid supply gun 18 into close contact with the filling port and fix it.

Next, turn on the solenoid valve 5QL4.

Turn on the valve 27. Air within the device to be supplied with liquid is sucked into the vacuum tank l from the vacuum suction port 19 via the vacuum pipe line 22.

The vacuum switch 36 detects that the predetermined degree of vacuum has been reached in the device to be supplied with liquid, inputs the information to the control device, confirms that the vacuum is maintained for a certain period of time, and then closes the solenoid valve 5Q.
Turn off L4 and turn off valve 27.

At the same time, solenoid valve 5OL2 is turned on/Help 13 is turned off, 5OL5 is turned on to turn on valve 29 in the liquid supply pipe 23 that reaches the liquid inlet 20, and solenoid valve 5OL3 is turned on to operate liquid supply pump 15. Then, the liquid is filled into the device to be supplied via the liquid supply pipe 23 and the liquid inlet 20. Utilizing the increase in internal pressure near the filling port of the liquid-receiving device as filling progresses, the pressure switch 35 detects the completion of filling and inputs it to the control device.

” Based on the input of a series of filling completion signals, solenoid 7 valve 5OL5 is turned OFF, valve 29 is turned OFF and F, solenoid 7 help S-〇L2 is turned OFF, valve 13 is turned ON, and solenoid valve 5Q is turned OFF.
L3 is turned OFF and the plunger of the liquid supply pump 15 is moved back.

By retracting the plunger, the liquid supply pump 15 is filled with the amount of liquid to be filled next time.

Simultaneously with the above action, the solenoid valve 5QL7 is turned ON for a certain period of time.1. <Lube 31 is turned ON to suck up excess liquid at the filling port of the device to be supplied with liquid, adjust the liquid level, and after a certain period of time has passed, solenoid valve 5OL7 is turned OFF, and valve 31 is turned OFF.

” By repeating the two series of actions, the liquid in the vacuum tank 1 decreases and falls to a predetermined position in the lower part of the tank.
When the liquid level is detected, solenoid valve 5OLI is turned on, B) rev 8 is turned on, and vacuum tank 1 is turned on.
The liquid is sucked and supplied from the liquid container 7 by the negative pressure inside, and when it is stored to a predetermined level, the solenoid valve 5O
LI is turned off, and valve 8 is also turned off.

1. As is clear from the above-mentioned action, the liquid is sucked from the liquid container into the vacuum tank and then stored, and then filled without coming into contact with air. Since the tank is dehumidified and degassed, and the negative pressure inside the vacuum tack is used to suck and supply the liquid into the tank, a pump for replenishing the liquid is not used.

Effects of the Invention The present invention has the effect of configuration 1 described in L, and the liquid can be stored in a vacuum tank and filled from there into the equipment to be supplied with the liquid, so the liquid can be filled without exposing it to air. , complete defoaming and dehumidification can be performed while stored in the vacuum tank, which has the effect of significantly improving filling efficiency.

Furthermore, since the liquid is replenished into the vacuum tank by the vacuum suction of the tank, it also has the effect of eliminating the need for a replenishment pump.

[Brief explanation of the drawing]

The drawing is an operational circuit diagram of one example of implementation. l: Vacuum tank, 4: Vacuum pump, 6: Liquid supply pipe, 7
:Liquid/body container, 8 valves, 12: Liquid outlet, 13: Valve, 14: Liquid supply pipe, 15 + liquid supply pump, 18: Liquid supply gun, 19: Vacuum suction port, 20: Liquid inlet, 5OL
I: first solenoid valve, 5OL2: second solenoid valve.

Claims (1)

[Claims] A vacuum tank connected to a vacuum pump is connected to a liquid container into which only dry air can be introduced through a liquid supply pipe having a valve opened and closed by a first solenoid valve, and a liquid outlet of the vacuum tank is connected to a liquid supply pipe having a valve opened and closed by a first solenoid valve. A liquid supply pipe having a valve opened and closed by a second solenoid valve is connected to the liquid supply pump, and a vacuum suction port of a liquid supply gun that can be brought into close contact with a filling port of a device to be supplied liquid is communicated with the vacuum tank. . A liquid vacuum filling device, wherein a liquid inlet of the gun is communicated with a liquid discharge port of the liquid supply pump.