JPH0131824Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a proportional solenoid valve, which performs quantitative control despite changes in the applied power during proportional control of the gas controlled by the proportional solenoid valve. This is a proportional solenoid valve.

(Conventional technology) The conventionally known technology is
The solenoid valve shown in No. 17141 has a pressure loss adjustment body installed in a part of the opening of the bypass passage, and the pressure loss is reset from the outside according to the type of fuel. , the gas amount changes (fully open - fully closed). Also, in 1987-
The gas proportional valve shown in No. 8226 is known to perform gas conversion by moving a gas conversion valve seat forward and backward relative to a fixed valve seat.

(Problem that the invention attempts to solve) In the conventional type, the power is not fully opened due to changes in the applied power.
The flow rate does not change proportionally between the fully closed state and the problem of ignition errors and explosive ignition.

(Means for Solving the Problem) The valve 2 provided at one end of the plunger 1 that penetrates the hollow part of the electromagnetic coil 4 is energized by a spring member 5 so as to close the opening 6, and the valve 2 is energized to the electromagnetic coil 4. According to this, the valve 2 is a proportional solenoid valve that opens proportionally in accordance with the applied power against a spring member 5, and even when the valve 2 is closed, the gas flows branching from the gas fluid inlet 10. A bypass 7 is provided opposite to the other end of the plunger 1, and a minimum opening is established through a gap between the control unit 3 provided at the other end of the plunger 1 and a bypass valve 8 having a smaller diameter than the opening of the bypass 7, which is always energized to open. Bypass valve 8 is driven by plunger 1 via control section 3 to maintain the above-mentioned valve 2, and the bypass valve 8 opens and closes in the opposite direction to that of valve 2.

(Function) Until the control unit 3 closes the bypass valve 8, the valve 2 gradually opens the opening 6, while the bypass 7 closes the valve 8.
Not affected by (Figure 3a) Also, exit 11
The flow rate changes as shown in part a of FIG. 4.

While the plunger 1 moves further to move the bypass valve 8 against the spring 9 to the position shown by the dashed line in FIG. 2, the bypass valve 8 gradually closes the bypass 7 and the flow rate therethrough is reduced (3 4b), even if the valve 2 opens the opening 6 and the flow rate through the opening 6 increases, it is canceled out and the flow rate from the outlet 11 does not change as shown in FIG. 4b.

Furthermore, even if the plunger 1 moves upward and moves the bypass valve 8 upward, the gap between the opening 7 and the bypass valve 8, which has a diameter smaller than that of the opening 7, does not change, so the flow rate does not change (Fig. 3c). 2 opens the opening 6 even more widely, so the flow rate from the outlet 11 changes as shown in FIG. 4c.

As described above, in the present invention, the flow rate changes in proportion to the power applied to the electromagnetic coil, making it possible to perform proportional gas control.

(Example) An example of the present invention will be explained with reference to a drawing.
A plunger 1 penetrates the hollow part of the electromagnetic coil 4, and has a valve 2 at one end and a control section 3 at the other end. Numeral 5 is a spring member that serves to keep the plunger 1 in the hollow part of the electromagnetic coil 4 and bias the valve 2 in the direction of closing the opening 6. When the electromagnetic coil 4 is not energized, the spring member 5 closes the valve 2. 6 is closed and when energization is performed, the valve 2 opens the opening 6 in proportion to the energized power.

7 is a bypass 7 through which gas flows even when the opening 6 is closed, and this bypass 7 is provided with a bypass valve 8. The bypass valve 8 is biased in the direction of opening the bypass 7 by a spring member 9, but if the control section 3 is moved through a gap between the control section 3 of the plunger 1 and the bypass valve 8, the bypass valve 8 will open. is moved against the spring 9 in a direction to close the bypass 7.

That is, as shown in detail in FIG. 2, the bypass 7 is fully open until the control section 3 moves the bypass valve 8, and when the control section 3 begins to close the bypass valve 8, the bypass 7 is gradually closed until it reaches a point. The bypass valve 8 is closed by the control unit 3 while maintaining the minimum opening from the position shown by the chain line. At this time, the valve 2 is being operated to open the opening 6.

10 is a fluid inlet, and 11 is a fluid outlet.

Since the present invention is constructed as described above, when the electromagnetic coil 4 is energized, the valve 2 is proportional to the energized power.
opens the opening 6 and the gas passes through the opening 6 and the bypass 7 and exits through the outlet 11.

(Effects) In the present invention, the flow rate changes in proportion to the power applied to the electromagnetic coil, making it possible to perform proportional gas control. Ignition can also be controlled by gas. Regarding ignition, in order to ignite with a gas amount that does not cause ignition errors due to too little gas amount or explosive ignition due to too much gas amount, the applied power is changed during proportional gas amount control. Nevertheless, since the gas amount is not changed, ignition can be carried out reliably even if there is a slight difference in the applied power, which is advantageous.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the proposed proportional solenoid valve, Figure 2 is a partially enlarged view, Figure 3 is a characteristic diagram showing the relationship between flow rate and energization in the bypass, and Figure 4 is the flow rate at the outlet. FIG. DESCRIPTION OF SYMBOLS 1... Plunger, 2... Valve, 4... Electromagnetic coil, 5... Spring member, 6... Opening, 7... Bypass, 8... Bypass valve, 9... Spring member.

Claims (1)

[Scope of utility model registration request] A valve 2 provided at one end of the plunger 1 passing through the hollow part of the electromagnetic coil 4 is biased by a spring member 5 to close an opening 6, and when the electromagnetic coil 4 is energized, the valve 2 is biased by the spring member 5. In a proportional solenoid valve that opens proportionally in accordance with the applied power, a bypass 7, through which gas branches off from the gas fluid inlet 10 and flows even when the valve 2 is closed, is connected to the other end of the plunger 1. A clearance is provided between the control unit 3 provided at the other end of the plunger 1 and a bypass valve 8 having a smaller opening diameter than that of the bypass 7 which is always energized to open, so that the bypass valve 8 maintains the minimum opening of the plunger 1. A proportional solenoid valve characterized in that the bypass valve 8 opens and closes in the opposite direction to the valve 2.