JPH0144909Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil amount regulator that supplies a small amount of flow at the start-up of combustion in an oil stove or the like or at the time of pilot combustion.

Conventionally, oil level regulators for kerosene stoves, etc. are shown in Figure 1a.
As shown in FIG. 2, there is an outflow valve 20 inside the oil amount regulator main body 10 in which liquid fuel B is stored, and the outflow valve 20 includes a valve body 21 for controlling the outflow amount, a valve seat 22, and the valve body 21. A spring 23 that constantly urges the
This is adjusted by the adjustment knob 30 to the protruding rod 3.
1 is moved up and down, and the opening 24 of the valve body 21 is opened and closed to allow the liquid fuel B to flow out. However, in this case, a large amount of liquid fuel B is supplied when the adjustment knob 30 is turned to the maximum flow rate when only a constant and small amount of liquid fuel B is required, such as at the start-up of combustion or during pilot combustion. This causes the inconvenience of Therefore, in order to supply a small amount of liquid fuel B at the start-up of combustion, the following ideas have been proposed.

That is, the response plate 40 has a part of the lower plate 42 engaged with the valve body 21 at a locking portion 44 and a base portion supported by a shaft 43 so as to be movable up and down at a position lateral to the valve body 21.
A guide screw 51 is screwed into the lid 10a of the oil amount regulator main body 10, and a pin 53 having a retaining ring 52 is attached inside the guide screw 53 so as to be movable up and down.
a lever 60 that is pressed downward to ensure a minute flow rate of the outflow valve 20; and a solenoid 70 that releases the pressure on the lever 60 to ensure the maximum flow rate.
The lower end of the pin 53 is located between the locking portion 44 and the shaft 43 and comes into contact with the upper plate 41 of the response plate 40, thereby limiting the upward rotation range of the response plate 40. This is an oil amount regulator.

In the conventional oil amount regulator configured as described above, when the adjustment knob 30 is rotated, for example, to the left, the protruding rod 31 moves upward, and together with this, the valve body 21 moves upward, and liquid flows into the opening 24. Fuel B flows in and flows out from the outlet 25 to an oil stove (not shown). However, at this time, the response plate 40 also rotates upward and the upper surface of the upper plate 41 comes into contact with the tip 53a of the pin 53 pressed by the lever 60, so the valve body 21 moves upward only by a distance corresponding to the predetermined interval. do not. Therefore, the opening 24 of the valve body 21 is only slightly opened, and a minute flow rate of the liquid fuel B can be obtained. When the solenoid 70 is energized after the start of combustion has finished, the lever 60 attracts the solenoid 70 and rotates upward, so the pin 53 moves upward, and the valve body 21 moves upward, causing the liquid fuel B This results in a maximum flow rate of .

However, in the conventional setting of such a small flow rate, the guide screw 51 is rotated to change the length from the lid 10a to the lower end 53a of the pin 53 as shown in FIG. The length up to the upper end 53b is also changed, resulting in the following inconvenience.

That is, in general, the oil flow regulator main body 10 is required to _be applicable to several types of models with different minute flow rates and maximum flow rates. The stroke of the model is located below S ₂
If so, even if the strokes of S ₁ and S ₂ are the same, the maximum flow rate of S _{1 and}
Only the lever 60 and solenoid 70 can be applied, which have an operating range that can cover the stroke of S ₃ that satisfies the minute flow rate of S _2.The more models there are, the larger the overall stroke will be, so the lever 60 must be used. There was a drawback that the solenoid 70 for adsorption had to be made large.

Additionally, when the temperature of liquid fuel B decreases, the viscosity increases and the amount of outflow decreases, while when the temperature increases, the viscosity decreases and the amount of outflow increases, but this situation can be avoided with conventional oil volume regulators. It also had the drawback of not having any so-called temperature correction mechanism.

In view of the above-mentioned drawbacks of the conventional ones, the present invention can be used in various types of kerosene heaters with different minute flow rates and maximum flow rates without increasing the size of the solenoid that attracts the lever. It is an object of the present invention to provide an oil amount regulator that also has a temperature correction mechanism that prevents minute changes in flow rate due to decreases and increases in temperature. The following will explain based on the drawings.

FIGS. 2a and 2b and FIG. 3 show an embodiment of the present invention, and the same components as in the conventional example are denoted by the same reference numerals. Reference numeral 20 denotes an outflow valve, which is provided inside the oil amount regulator main body 10 in which liquid fuel B is stored. The outflow valve 20 includes a valve body 21 that controls the outflow amount of the liquid fuel B, a valve seat 22, and a spring 23 that always urges the valve body 21 upward.
The valve seat 22 is provided with a through hole 26 through which liquid fuel B flows into the opening 24. 27 is an outlet with a notch 28 at its upper end, and the liquid fuel B flows through the notch 2.
8, through the through hole 26 and the opening 24, and flows out to a kerosene stove (not shown). Numeral 30 is a knob for adjusting the flow rate of liquid fuel B, and by rotating this knob, the protruding rod 31 moves up and down.

A response plate 80 is attached to the back surface of the lid 10a, and has a horizontal upper plate 81 and a lower plate 82, and is attached to rotate up and down about a shaft 83 as a fulcrum. The lower plate 82 is longer than the upper plate 81, and its distal end is engaged between the upper end of the valve body 21 of the outflow valve 20 and the lower end of the protruding rod 31. Further, a flow stop pin 90 is brought into contact with the upper surface near the tip of the upper plate 81, and when an earthquake occurs, the flow stop pin 90 is pushed down, and the lower plate 8
The valve body 21 that comes into contact with the opening 2 moves downward and closes the opening 2.
4 will be closed.

Reference numeral 100 designates a minute flow rate regulator that is provided through the lid 10a so that its lower end is located between the locking portion 84 and the shaft 83 and can abut the upper plate 81 of the response plate 80, and that it moves up and down. Cylindrical pilot pin 1
01 and the adjustment screw 10 attached to the inner lower part
It consists of 2. The pilot pin 101 is made of a resin that expands and contracts sensitively to temperature changes, and has a flange portion 103 extending in the circumferential direction at its upper end to be engaged with the lid 10a, and a flange portion 103 at its lower end with a cross section of approximately 0.5 mm. A locking portion 104 projecting outward in the shape of a letter is provided to prevent the pilot pin 101 from coming off the lid 10a, and to maintain a constant stroke in which the pilot pin 101 can move up and down. Further, the adjusting screw 102 moves in the vertical direction by its rotation, and its lower end 102a is located on the upper plate 81 of the responsive plate 80 with a slight distance therebetween. That is, screw 1
This interval is provided so that when the lower end 102a of the valve 02 comes into contact with the upper surface of the upper plate 81, a minute flow rate applicable to that model flows out from the opening 24 of the valve body 21. Reference numeral 60 denotes a magnetically attractive lever consisting of a horizontal piece 61 and a vertical piece 62, which rotates about a shaft 63 as a fulcrum. The horizontal piece 61 is pressed against the upper end of the pilot pin 101 by a spring 65 attached to a protrusion 64 at the tip of the vertical piece 62. A solenoid 70 attracts the vertical piece 62 of the lever 60 when energized.

Since the present invention is constructed as described above, when the knob 30 of the oil amount regulator body 10 is rotated and the protruding rod 31 is moved upward to ignite the kerosene stove, the valve body is biased by the spring 23. 21 moves upward, and the response plate 80 rotates upward. When the upper plate 81 of the response plate 80 comes into contact with the lower end 102a of the screw 102 of the minute flow rate regulator 100, the upward movement of the valve body 21 is stopped, and the opening 24 is inserted into the through hole provided in the valve seat 22. It is located in the lower part of 26 in communication. This allows opening 2
4, a small amount of liquid fuel B is supplied to the kerosene stove through the outlet 27. After the start-up of combustion is completed, the solenoid 70 is energized, and the vertical piece 62 of the lever 60 is attracted to the solenoid 70 and rotated clockwise, thereby releasing the horizontal piece 61 from pressing on the pilot pin 101. When the knob 30 is set to the maximum scale, the spring 23 of the outflow valve 20 moves the valve body 21 further upwards, and the opening 24 communicates with the entire through hole 26 to obtain the maximum flow rate.

In this way, in order to supply a small amount of liquid fuel B at the start of combustion in a kerosene stove, etc., the horizontal piece 61 of the lever 60 is pressed against the upper end of the pilot pin 101 by the spring 65, and the lower end 102a of the adjustment screw 102 is moved to the maximum position. Since it is in the lower position, the minute flow rate for each model can be set to a desired amount by adjusting the vertical movement of the adjusting screw 102. On the other hand, when the start-up of combustion is completed as described above, the pressing action of the lever 60 on the pilot pin 101 is released;
Since the upward movement stroke of the pilot pin 101 is constant, the upper end of the pilot pin 101 is stopped at a predetermined position, as shown in FIG. 2b. Therefore, if the amount of movement (strokes S ₄ , S ₅ ) of the pilot pin 101 from the minute flow rate to the maximum flow rate is the same, even if the models have different minute flow rates and maximum flow rates, the stroke S of the lever 60 will be the same. ₆
are the same as the strokes S ₄ and S ₅ of the pilot pin 101, and the stroke of the lever bar 60 does not become large as in the conventional case.

Furthermore, as shown in Figure 3, the amount Q of outflow from the oil volume regulator has the relationship Q=α×A×√2 according to Bernoulli's theorem. Here, α is the flow coefficient, A is the opening area of the opening 24 of the outflow valve 20, and H is the height of the liquid level of the liquid fuel B with respect to the opening 24. In the above equation, if α, A, and H are constant, the outflow amount will also be constant. However, as the temperature decreases, the viscosity of liquid fuel B increases, so the flow rate coefficient α decreases, resulting in a decrease in the outflow amount Q. When the temperature rises, the viscosity decreases, so the flow rate coefficient α increases, and the outflow amount Q increases. do.

However, the present invention does not include the pilot pin 101.
is made of resin that expands and contracts sensitively to temperature changes, so when the temperature is low, pilot pin 1
01 contracts and the locking portion 10 of the pilot pin 101
Since the distance from 3a to the lower end 102a of the screw 102 becomes shorter, the opening 24 of the valve body 21 moves further upward and the opening area A becomes wider. On the other hand, when the temperature is high, the pilot pin 101 expands and the opening area A of the opening 24 becomes narrower. This also provides a function to correct the outflow amount Q due to temperature changes.

In addition, the amount of contraction of the pilot pin 101 is Δ,
The lower end 102 of the screw 102 from the shaft 83 of the response plate 80
If the distance from the shaft 83 to the outflow valve 20 is L ₁ and the distance from the shaft 83 to the axis of the outflow valve 20 is L ₂ , the amount of rise of the valve body 21 is Δ
It is determined as ×L ₂ /L ₁ . At this time, since the minute flow rate regulator 100 is located between the locking part 84 of the response plate 80 where the valve body 21 is engaged and the shaft 83 of the response plate 80, L ₂ >L ₁ and the minute flow rate is Adjuster 100
Even if the amount of displacement is small, this response plate 80
The amount of displacement of the valve body 21 increases depending on the lever ratio. Therefore, the range in which the minute flow rate can be adjusted by the adjustment screw 102 can be widened, and even if the pilot pin 101 is only slightly displaced with respect to temperature, the valve body 21 can not be moved up and down significantly. Therefore, the outflow amount can be corrected appropriately.

As explained above, according to the present invention, minute flow rate adjustment and maximum flow rate adjustment are performed by vertical movement of the adjustment screw without moving the position of the pilot pin, and the movement stroke of the pilot pin is constant. Even when this oil flow regulator is used for models with different minute flow rates and maximum flow rates, the stroke of the lever is always constant, and it has the advantage that the means for controlling it, such as a solenoid, does not need to be enlarged as in the past. .

In addition, since the lower end of the adjustment screw is located between the locking part of the response plate and the axis of the response plate, even when the displacement of the minute flow rate regulator is small, the displacement of the valve body is small. This has the advantage that the adjustment range of the minute flow rate can be increased, and the outflow amount can be corrected appropriately.

[Brief explanation of the drawing]

The drawings are for explaining the present invention and are shown in Figure 1a.
is a sectional view of a conventional oil amount regulator, FIG. 1b is a sectional view showing the main parts of a conventional oil amount regulator, and FIG. b is a sectional view showing the main parts of the oil amount regulator according to the present invention, and FIG. 3 is a sectional view illustrating the temperature correction mechanism of the oil amount regulator according to the present invention. In the figure, 10... Oil amount regulator main body, 20... Outflow valve, 40, 80... Response plate, 60... Lever, 7
0... Solenoid, 100... Minute flow rate regulator,
101...Pilot pin, 102...Adjustment screw.

Claims (1)

[Claims for Utility Model Registration] An outflow valve having a valve body that moves up and down in conjunction with an oil volume control knob to control the amount of liquid fuel flowing out; A response plate pivotably supported to be vertically movable at a lateral position; a pilot pin made of resin that expands and contracts sensitively to temperature changes and movable vertically over a predetermined stroke; It consists of an adjustment screw that is screwed into a pin and whose position can be adjusted up and down, and the lower end of the adjustment screw is located between the locking part of the response plate and the axis of the response plate, and is in contact with the response plate. a minute flow rate regulator that restricts the upward rotation range of the response plate by contacting the lever; a lever that presses the pilot pin of the minute flow rate regulator downward to ensure a minute flow rate of the outflow valve; An oil flow regulator consisting of a control means that releases pressure and ensures maximum flow rate.