JPH0744562U - Electromagnetic safety valve device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent sliding of the contact point between the lever and the electromagnetic safety valve as much as possible from the time of closing the electromagnetic safety valve to the end of opening. [Structure] An end portion 2 of a lever 2 which is swingable around a fulcrum 1.
b to the pressing portion 5a of the electromagnetic safety valve so as to face the lever 2
Then, the pressing portion 5a of the electromagnetic safety valve 5 is pressed to open. The end 2a of the lever 2 is formed into an arcuate surface 2b2. The pressing surface 5e of the pressing portion 5a of the electromagnetic safety valve 5 is configured to be a surface orthogonal to the opening / closing direction of the electromagnetic safety valve 5, and while the electromagnetic safety valve 5 is pressed and opened by the lever 2, the arc-shaped surface 2b2 of the lever 2 and the pressing portion The displacement of the contact point of 5a with the pushing surface 5a is made to be the same in the arcuate surface 2b2 and the pushing surface 5e.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic safety valve device installed in a fuel supply passage of a gas water heater, a gas stove, and other combustors.

[0002]

[Prior art]

 As a conventional electromagnetic safety valve device, as shown in FIGS. 3 and 4, an end portion e of a lever b swingable around a fulcrum a is arranged so as to face a pressing portion h of an electromagnetic safety valve g. It is known that the electromagnetic safety valve g is opened by pressing (Japanese Utility Model Publication Sho 63-1 01748). In the figure, d is an operating rod for pushing one end c, x is an arcuate surface of the end e of the lever b, i is a sealing surface, y is a pressing surface of the pressing portion h, g-1 is an adsorbent, g-2. Is an electromagnet, F is a push button, and G is a heart cam.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional one, the contact point between the arcuate surface x of the end portion e of the lever b and the pressing surface y of the pressing portion of the electromagnetic safety valve g from the start of the opening of the electromagnetic safety valve g to the end of the opening. The shift direction is opposite. That is, the contact point is displaced leftward on the arcuate surface x, but is displaced rightward on the pressing surface y. As a result, the arcuate surface x and the pressing surface y slide against each other, which produces metal powder, which adheres to the sealing surface i of the electromagnetic safety valve g and deteriorates the sealing performance.

An object of the present invention is to obtain an electromagnetic safety valve device that does not have such a problem.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention is such that an end portion of a lever swingable around a fulcrum is arranged to face a pressing portion of an electromagnetic safety valve, and the lever is used to press and open the electromagnetic safety valve. The end portion of the lever is formed into an arcuate surface, and the pressing surface of the pressing portion of the electromagnetic safety valve is formed into a surface orthogonal to the opening / closing direction of the electromagnetic safety valve, and the lever is used to press and open the electromagnetic safety valve. In the meantime, the displacement of the contact point between the arc-shaped surface of the lever and the pressing surface of the pressing portion is set to be in the same direction on the arc-shaped surface and the pressing surface.

[0006]

[Action]

 According to the electromagnetic safety valve device having the above-described configuration, the arcuate surface 2b2 and the pressing surface 5e of the electromagnetic safety valve 5 are pressed while the electromagnetic safety valve 5 is pressed and opened by the lever 2, that is, from the start of opening the valve to the end of opening the valve. Since the displacement of the contact point with and is in the same direction, that is, as shown in FIG. 2, for example, the displacement of the contact point between the arcuate surface 2b2 and the pushing surface 5e of the electromagnetic safety valve 5 is both leftward. As a result, the arcuate surface 2b2 moves substantially on the pressing surface 5e of the pressing portion 5a so as to roll.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

In the drawing, reference numeral 6 shows an electromagnetic safety valve device for a gas water heater, for example. In a gas passage 7 provided in the electromagnetic safety valve device 6, the electromagnetic safety valve 5 and a lever swingable around a fulcrum 1 are provided. 2 is provided, and the pressing portion 5a of the electromagnetic safety valve 5 is provided so as to face the end portion 2b of the lever 2. To further explain this, the swingable lever 2 pivotally supports the middle in the gas passage 7 and has an operating rod 3 at one end 2a thereof which is pressed by a push button F inserted in a front operation panel. The rear end 3a is arranged to face each other with a gap, and the other end 2b is made to face the metal pressing portion 5a provided at the center of the electromagnetic safety valve 5. In this embodiment, a separate push pin 2b1 having an arcuate surface 2b2 is attached to the end 2b of the lever 2. The pressing surface 5e of the pressing portion 5a is orthogonal to the opening / closing direction of the electromagnetic safety valve 5, and the pressing surface 5e is pressed by the arcuate surface 2b2 of the lever 2.

In FIG. 1, 5b is a sealing surface of the electromagnetic safety valve 5, 5c is an adsorbent of the electromagnetic safety valve 5, and 5d is an electromagnet that adsorbs the adsorbent 5c.

The lever 2 is swingable around an intermediate fulcrum 1, and the operating rod 3 is movable forward and backward. Further, a shutoff valve 8 that is opened and held at an intermediate position of the push button F is fixed to the operating rod 3, and an ignition valve 9 composed of a small diameter portion that is opened before the end position of the push button F. Is formed.

Thus, when the push button F is pressed from the starting end position, the shutoff valve 8 is opened before the intermediate position via the operating rod 3 that moves rearward, and the ignition valve is opened before the end position. Nine open valves are given. The electromagnetic safety valve 5 is designed to be held open at the end position where the adsorbent 5c abuts the electromagnet 5d via the operation 3 and the swinging lever 2.

Although the above-mentioned structure is not particularly different from the push-push type using the conventional heart cam G, in the present embodiment, it passes through the fulcrum 1 of the lever 2 at right angles to the opening / closing direction of the electromagnetic safety valve 5. A line A is a line segment D connecting the contact point B between the pressing portion 5a of the electromagnetic safety valve 5 and the push pin 2b1 at the start of valve opening and the fulcrum _1, and the pressing portion 5a and the push pin at the end of valve opening. It is designed to be a bisector which divides the included angle θ formed by a line segment E connecting the contact point C of the nozzle 2b1 and the fulcrum 1 into substantially equal parts.

In doing so, in particular, as shown in FIG. 2, the opening and closing direction of the electromagnetic safety valve 5 from the start of valve opening when the electromagnetic safety valve 5 is pushed open by the push pin 2b1 to the end of the valve opening. Since the vector of the pressing force of the lever 2 that acts on the electromagnetic safety valve 5 can be made to substantially coincide with each other, it is possible to eliminate prying when opening the electromagnetic safety valve 5, and also from the start of opening the valve to the end of opening the valve. The pressing force effectively works until time, and a small force is sufficient, and the operating force of the operating rod 3 can be reduced.

Then, the displacement of the contact point between the push pin 2b1 and the pressing portion 5a of the electromagnetic safety valve 5 from the start of the opening of the electromagnetic safety valve 5 to the end of the opening is an arc shape on the side of the push pin 2b1. Since the surface 2b2 and the pressing surface 5e side of the pressing portion 5a of the electromagnetic safety valve 5 are substantially equal in the same direction, that is, in the left direction in FIG. 2, the push pin 2b1 rolls on the pressing surface 5e. That is, as shown in FIG. 2, when the contact point between the arcuate surface 2b2 and the pressing surface 5e of the pressing portion 5a passes through the fulcrum 1 and is parallel to the pressing direction when viewed in the pressing direction of the electromagnetic safety valve 5. The lever 2 is pushed in a direction in which the contact point is gradually away from X, and the opening of the electromagnetic safety valve 5 is finished before the contact point reaches the position farthest from the line X. did.

In this case, when the electromagnetic safety valve 5 is pushed open, the contact points between the arcuate surface 2b2 and the pressing surface 5e are indicated by B, C, K, as shown by the chain line from the state shown by the solid line in FIG. To the left. That is, the contact points of the two are displaced in the same direction, and the arcuate surface 2b2 moves so as to substantially roll on the pressing surface 5e on the pressing portion 5a, and when sliding, metal powder is generated by the sliding, and electromagnetic waves are generated. It does not adhere to the sealing surface 5b of the safety valve 5 and deteriorate the sealing performance.

It should be noted that the contact point L in FIG. 2 shows a bad case in which the opening of the electromagnetic safety valve 5 ends after reaching the position farthest from the line X.

In this case, the contact point with the pushing surface 5e on the arcuate surface 2b2 shifts to the left as the lever 2 swings, but on the pushing surface 5e, it approaches the line X, that is, to the right. Move. Therefore, the displacement of the contact point between the arcuate surface 2b2 and the pressing surface 5 is opposite.

Further, in the present embodiment, the electromagnetic safety valve 5 serves as a stopper for the operation stroke due to the contact between the adsorbent 5c and the electromagnet 5d, and is pushed at the end of the opening of the electromagnetic safety valve 5 where the operation pressing force is maximized. Since the pin 2b1 presses the center of the electromagnetic safety valve 5, it is possible to prevent the electromagnetic safety valve 5 from being twisted due to an unbalanced load, thereby improving the adsorption performance and durability performance. .

[0019]

[Effect of device]

 As described above, according to the present invention, the displacement of the contact point between the arcuate surface of the electromagnetic safety valve and the pressing surface of the electromagnetic safety valve from the start of opening the valve to the end of opening the valve is in the same direction. The arcuate surface provided on the lever pushes the pressing surface of the pressing portion while moving it on the pressing surface of the pressing portion so that it slides like the conventional example to generate metal powder. However, it does not adhere to the sealing surface of the electromagnetic safety valve and deteriorate the sealing performance.

[Submission date] February 22, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014] The displacement of the contact point between the pressing portion 5a of the push pin 2b 1 and the electromagnetic safety valve 5 from the time of opening the start of the electromagnetic safety valve 5 until the time of valve opening end is arcuate surface of the push pin 2b1 2b2 in the pushing surface 5e side of the pressing portion 5a of the side and the electromagnetic safety valve 5 in the same direction and ing.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

By the way, when the lever 2 is swung clockwise as shown in FIG. 2, the contact point moves in a direction away from the fulcrum 1 side on the arc-shaped surface 2b2 as shown by B, C and K. When the lever 2 is displaced and further moved on the pressing surface 5e in the direction away from the line X as indicated by B, C, and K, and the lever 2 is further swung from the position indicated by K, the displacement is made closer to the line X, When displaced in a direction approaching in the direction of displacement of the contact point on the arcuate surface 2b2 on the pushing surface 5e becomes the opposite. Therefore, as described above, the condition for the displacement of the contact point to be in the same direction is that the contact point between the arcuate surface 2b2 and the pressing surface 5e of the pressing portion 5a is the pressing surface as shown in FIG. 5e, the pressing operation range of the lever 2 is set in a region gradually passing away from the line X passing through the fulcrum 1 and parallel to the pushing direction of the electromagnetic safety valve 5 . As a result, the arcuate surface 2b2 moves in a manner substantially rolling on the pressing surface 5e on the pressing portion 5a, and metal powder is generated as if sliding, and it adheres to the sealing surface 5b of the electromagnetic safety valve 5 and seals. It doesn't hurt the sex.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In FIG. 2, the contact point L is outside the region where the contact point with the pressing surface 5e of the pressing portion 5a is gradually away from the line X passing through the fulcrum 1 and parallel to the pressing direction of the electromagnetic safety valve 5 (in the line X shows the case where bad was pressing the lever 2 until closer rather than area).

[Brief description of drawings]

FIG. 1 is a cutaway front view showing an embodiment of the present invention.

FIG. 2 is an operation explanatory view in which an essential part of FIG. 1 is enlarged.

FIG. 3 is a cutaway front view of a conventional example.

FIG. 4 is an operation explanatory view in which a part of FIG. 3 is enlarged.

[Explanation of symbols]

 1 fulcrum 2 lever 2b end 3 operating rod 5 electromagnetic safety valve 5a pressing part 5e pressing surface

Claims (1)

[Scope of utility model registration request] 1. An end portion of the lever, wherein an end portion of a lever swingable around a fulcrum is arranged to face a pressing portion of an electromagnetic safety valve, and the electromagnetic safety valve is pressed and opened by the lever. Is an arcuate surface, and the pressing surface of the pressing portion of the electromagnetic safety valve is a surface orthogonal to the opening and closing direction of the electromagnetic safety valve, and while the electromagnetic safety valve is pressed and opened by a lever, An electromagnetic safety valve device, wherein the displacement of the contact point of the pressing portion with the pressing surface is in the same direction on the arcuate surface and the pressing surface.