JPS6145181A - Liquid discharge valve device - Google Patents

Abstract

PURPOSE:To provide a liquid discharge valve device which can have a pump action and a stop valve action by fixing a valve body to a diaphragm for demarcating a pump chamber and driving the diaphragm. CONSTITUTION:When a solenoid coil is urged, a diaphragm device 21 is drawn upward to interrupt the interception of a passage by a valve body 19, so that water is introduced in a pump chamber 18 through the first one way valve 14. On stopping urging to the coil, water in the pump chamber 18 is drained off through the second one way valve 15 by a spring 22. When the drainage is completed, and oscillator 26 stops the supply of power to the solenoid coil, and the diaphragm device 21 is biased downward by the spring to keep the interception of the passage.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a liquid discharge valve device, particularly a liquid discharge valve device having a pump function.For example, the present invention relates to a liquid discharge valve device having a pump function. Or it is suitable to be used for draining oil to the outside.

[Prior art]

This type of valve device has been commonly used in the fuel supply system of diesel engines. Diesel fuel contains relatively more water than gasoline, etc., so
If used as is, there were problems such as rust forming inside the engine, and the performance of the lubricating oil on the sliding parts deteriorated, causing things to get stuck, so-called sticking. Therefore, conventionally, instead of a normal fuel filter, a water separation type fuel filter with a moisture+m function has been used, or a sedimenter has been installed in front of the normal fuel filter to separate water and coarse foreign matter by sedimentation. . The separated water stored in the water separator fuel filter or settler is discharged before reaching the overflow level. In order to perform this discharge automatically and reliably, a conventional drainage system has been used that uses a solenoid valve and a level sensor, or in the case of forced discharge, a solenoid valve, a level sensor, a pump, and a control device that operates and controls these. A drainage system using In particular, drainage devices using pumps are highly reliable for drainage.

〔problem〕

However, since a drainage device using a pump has a large number of component devices, it cannot be downsized and costs are high. In addition, the wiring and piping between each component becomes complicated,
Operational stability decreases and breakdowns are more likely to occur.

[Means for solving problems]

Therefore, an object of the present invention is to provide a discharge valve device that solves the above-mentioned problems.

In order to achieve this objective, in the discharge valve device according to the present invention, the pump function and the valve function are integrated in one place.

That is, a valve body is attached to a diaphragm that defines the pump space, and the diaphragm is driven to perform a pump action and a closing valve action.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 2 shows a fuel tank 1, a water separation type fuel filter 2,
The fuel supply system of a diesel engine is shown, including an injection pump 3 and an injection nozzle 4. Fuel (F) is sent from a fuel tank 1 through a filter 2 to an injection pump 3 via piping and is injected from an injection nozzle 4. A portion of the fuel is returned to the fuel tank 1 through a return pipe. Water separated from the fuel (F) accumulates at the bottom of the filter 2. In order to drain this accumulated water before it overflows, a drain valve system @5, which is an embodiment of the present invention, is used. Filter 2 for drainage
This is done through a drain boat (D)" uF water pipe 6 formed at the bottom of the drain valve device 5, a flow path in the drain valve device 5, and a drain pipe 7.

Details of the drain valve device 5 of FIG. 2 are shown in FIG.

The main body 8 of the drain valve device 5 is formed with two flow path portions 9.10 constituting a flow path.

Each channel section 9.10 extends from the end of the body 8 towards a central recess and opens there. Union joints 11, 12 are screwed into each end of the flow path. Filter 2 through inlet side union joint 11 (D)
It communicates with the bottom of the.

By screwing in the joint 11, the filter mesh 13 and the first one-way valve 14 are fixed within the flow path portion using the shoulder (SH) of the flow path portion 9. Naturally, the first one-way valve 14 is arranged in such a direction that it freely passes the waste water from the inlet side union joint 11, but does not allow the flow from the opposite direction to pass therethrough, and the filter mesh 3 is connected to the first one-way valve. 14 on the upstream side. The outlet side union joint 12 is connected to the drain pipe 7. The second one-way valve 15 is arranged in such a direction as to freely allow the flow of waste water to the outlet side union joint 12, but not to allow flow from the opposite direction. Therefore, the waste water can flow in the flow path from the inlet union joint to the outlet union joint.

The central recess of the main body 8 is closed by a diaphragm 16, and the peripheral edge of the diaphragm 16 is fixed to the main body 8 by a casing 17. A ribbon chamber 18 is defined by the diaphragm 16 and the two one-way valves 14.15.

One end of the valve body 19 is screwed into one end of the stem 20 through the central opening of the diaphragm 16 so as to sandwich the diaphragm 16 therebetween. As a result, the diaphragm device 21 is deflected downward in the figure by the restoring force of the spring 22, which is a bias device formed by the diaphragm device 21 that moves integrally. At this time, the diaphragm device 21 and the opening of the flow path portion 9 are positioned such that the valve body 19 closes the opening of the flow path portion 9 and blocks the flow path.

Further, an annular solenoid coil 23 is mounted on the casing 17 surrounding the stem 20.

When this solenoid coil 23 is energized, the stem 2
0, that is, the entire diaphragm device 21 is connected to the spring 2
It has a capacity capable of generating an electromagnetic force having a magnitude and direction sufficient to oppose the deflection force of 2 and move it upward in the figure. Therefore, when the solenoid coil 23 is energized, the opening of the flow path portion 9 is opened and the flow path is communicated.

Next, the operation of the drain valve device 5 will be explained.

First, when water accumulates at the bottom of the filter 2 to an overflow level, the level sensor 24 provided at the bottom senses this and sends a signal (S) to the amplifier 25. A signal (S) from the level sensor 24 is amplified by an amplifier 25 and sent to an oscillator 26 as a command (C). The oscillator 26 operates the solenoid coil 23 while receiving the command <C> from the amplifier 25 or for a predetermined time after receiving the first command (C).
This is an ON-OFF circuit that alternately repeats supplying and stopping power to the terminal. This causes the solenoid coil 23 to be energized intermittently. The oscillator 26 is provided with a control device that changes the ON-OFF period and changes the operating time. These amplifier 25, oscillator 26, and control device act as a controller that controls the energization of the solenoid coil 23. The diaphragm device 21 is operated by a deflection force (downward in the figure) by a spring 22 and a solenoid coil 2.
The receiver reciprocates alternately with the lifting force (upward in the figure) caused by the electromagnetic force in step 3. The reciprocating movement of the diaphragm device 21 causes the diaphragm 16 to deform, and the capacity of the pump chamber also changes. This provides a pumping effect. That is, when the solenoid coil is energized, the diaphragm
is pulled upward against the deflection force of the spring. As a result, the content of the pump seedlings becomes larger, and at the same time,
Since the flow path is interrupted by the valve body 19, the filter 2
Drainage from the bottom of the drain pipe 6, inlet side union joint 11,
The pump chamber 1 through the first one-way valve 14 and the flow path section 9
It will be introduced within the day. At this point, when the energization of the solenoid coil is stopped, the diaphragm device 21 is returned to its original position by the spring 22, and the capacity of the pump v18 is reduced. Drainage from the pump room within one day is drained through the second one-way valve 15, the flow path portion 1o1 outlet side union joint 12, and the drain pipe 7. These operations are repeated alternately until drainage is completed. The completion of drainage is determined by determining that drainage is complete after repeated operations for a certain period of time, or by determining that drainage is complete when a level sensor having two set levels, high and low, indicates a low level.

When drainage is complete, the oscillator 26 stops supplying power to the solenoid coil. Then, the diaphragm device 21
is deflected downward by the spring 22, and the flow path remains blocked.

In this embodiment, the spring 22 is interposed between the end surface of the stem 20 and the casing 17, but the diaphragm 16
It is also possible to form an annular protruding flange or the like between the stem 20 and the casing 17 or at the center of the stem 20, and to interpose a spring between the flange and the casing.

In the embodiment described above, the biasing device spring 22
The configuration is such that the diaphragm device 21 is always biased to block the flow path, and the blocking of the flow path is interrupted by energization of the solenoid coil, but an embodiment in which the bias device and the solenoid coil act in the opposite manner There is also. That is, the bias device acts to keep the diaphragm device open at all times, and while the solenoid coil is energized, it deflects the diaphragm device to block the flow path. In this embodiment, when drainage is not required, the solenoid coil is energized to deflect the diaphragm device to block the flow path, and when drainage is required, the solenoid coil is energized intermittently to move the diaphragm device back and forth. It is something that can be done. In this case as well, the same action and effect as in J above can be obtained.

[Action and effect]

As described above, in the present invention, the diaphragm device does not allow the diaphragm device to flow until the liquid to be discharged (in the case of the above embodiment, water separated by the filter) accumulates in the storage portion to the point where it should be discharged. It acts as a normally closed valve. When the liquid to be discharged reaches a state where it should be discharged, the biasing force of the bias device and the electromagnetic force of the solenoid coil alternately act on the diaphragm device, causing the diaphragm device to reciprocate and exhibit a pumping action.

In this way, the valve device according to the present invention has both the functions of a normal shutoff valve and a pump.

Therefore, it is not necessary to separately provide a solenoid valve and a pump as in the past, so the number of component devices can be reduced.
Cost reduction and miniaturization are possible.

Furthermore, since there is no need for piping or wiring between the two, failures are less likely and repair management becomes easier. In addition, there are no restrictions on the mounting position or mounting condition, and since it can be used by simply connecting it to the liquid storage section to be discharged using piping, etc., it can be easily attached to existing equipment, such as a fuel supply system. Additional mounts can be installed. The pump operation of the valve device according to the present invention is of a self-priming type, and unlike conventional rotary pumps, there is no need to bleed air at the time of startup, so the operation is reliable.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a discharge valve device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a fuel supply system of a diesel engine to which the discharge valve device of FIG. 1 is applied. 9.10...Flow path part: 14.15...One-way valve;
16... diaphragm; 19... valve body; 20...
Stem: 22... Spring: 23... Solenoid coil: 25... Amplifier; 26... Oscillator.

Claims (1)

[Scope of Claims] A channel whose one end communicates with a liquid to be discharged container containing a liquid to be discharged, and a channel configured such that the liquid to be discharged flows from one end of the channel to the other end. two one-way valves arranged in series in the flow path; a diaphragm defining a pump chamber together with the one-way valves and the flow path; and a diaphragm integrally attached to the diaphragm and one of the diaphragms A stem protruding from the side,
a diaphragm device having a valve body integrally attached to the diaphragm and protruding from the other side of the diaphragm and responsive to the stem; a biasing device for biasing the diaphragm device in a predetermined direction; , a solenoid coil that moves and holds the diaphragm device in a direction opposite to the predetermined direction against the biasing force of the bias device; and a signal from a device that senses the state of the liquid to be discharged in the storage portion. a controller that determines and controls energization of the solenoid coil.