JPH066844U - Stop valve for gas cock - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A fuse cock equipped with a knob-locking reset mechanism and having a built-in overflow safety mechanism and intermediate opening / closing use prevention mechanism inside the shut-off valve. There is provided a shut-off valve that always rotates with a constant low torque regardless of the frequency of use. [Structure] A peripheral surface of a shut-off valve having a built-in over-flow safety mechanism and an intermediate opening / closing prevention mechanism is surrounded by at least one of upper and lower valve seats of a gas passage hole provided in the shut-off valve. Form a groove.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a closing valve in a gas cock (hereinafter referred to as “fuse cock”) having a structure in which an overflow safety mechanism and an intermediate opening / closing prevention mechanism are built inside the closing valve of the gas cock.

[0002]

[Prior art]

 Conventionally, there are various types of gas cocks provided with an overflow safety mechanism. The most prevalent one among them is a structure in which a spherical valve, a diaphragm valve, or the like closes the gas passage hole to block the outflow of gas when the outflow of gas occurs. This type of gas cock generally shuts off the knob of the cock after completely shutting off the gas outflow, taking appropriate measures such as when the gas hose comes off, and then using the gas again. It is equipped with a reset mechanism that can return the spherical valve and the like from the gas passage hole to return to the normal use state by returning to the state of “”.

As described above, as a method of completely shutting off the gas and then returning it to the used state, a protruding ridge body, a plate, a spring, a cam, a lever, etc. for resetting interlocking with the knob of the cock are provided, or It is common to separate the spherical valve from the gas passage hole by making the gas inlet of the shutoff valve eccentric from the rotation axis.

However, in the reset mechanism of the knob interlocking type, although the reuse is simplified, such a reset mechanism allows the gas shut-off function at the time of over-flow which is the original function of the gas cock with the over-flow safety mechanism. There was a flaw that made it completely incompetent. In other words, the structure is such that the spherical valve etc. that is fitted into the valve seat is pushed out by the reset rod etc. interlocking with the rotation of the closing valve, so when the closing valve is in the half open state, the reset rod etc. obstructs the spherical This is because the valve, etc. did not fit securely into the valve seat and the outflow of gas could not be prevented. In other words, in order to use the conventional gas cock with overflow safety mechanism in an appropriate state, it is necessary to turn the closing valve, that is, the knob to the fully open position, and only at this time can the spherical valve etc. securely contact the valve seat. It is possible to do so.

Therefore, in a gas cock with an overflow safety mechanism equipped with a knob-linked reset mechanism, a mechanism in which the gas flow path does not open unless the stop valve is turned to the fully open position (intermediate opening / closing prevention mechanism: ON -OFF type) was installed in the shutoff valve to develop a fuse cock with a so-called intermediate opening / closing prevention mechanism that is designed so that the gas cock with overflow safety mechanism cannot be used unless it is in proper condition. Became commonly used.

[0006]

[Problems to be solved by the device]

 However, as shown in FIG. 5, the conventional fuse cock 20 has a structure in which the intermediate opening / closing use preventing mechanism 22 is built in the shutoff valve 23 together with the overflow safety mechanism 21, and therefore the shutoff valve 23 has a length that is long. As the length increases, the outer diameter also increases, and as a result, the contact area with the valve seat 24 increases, resulting in an excessive rotational torque for rotating the closing valve.

[0007]

[Means for Solving the Problems]

 Therefore, the present inventor has completed the present invention as a result of earnest research in view of the above problems, and is characterized in that an overflow occurs inside the stop valve of the gas cock, which is equipped with a knob-linked reset mechanism. In a gas cock with a built-in safety mechanism and an intermediate opening / closing prevention mechanism, connect at least one of the upper and lower sides of the gas passage hole provided in the peripheral surface of the shutoff valve with the valve seat that keeps the airtight state. This is due to the provision of a peripheral groove on the peripheral surface part to be hit.

Here, the “fuse cock” referred to in the present specification is configured to prevent the outflow of gas by closing the gas passage hole with a spherical valve or the like when the gas is excessively outflowed, such as when the gas hose is removed. A gas cock with a built-in shutoff valve that has an over-flow safety mechanism and an intermediate opening / closing prevention mechanism that shuts off the outflow of gas when the shutoff valve is half-open. In this case, the meaning of built-in does not mean that the overflow prevention mechanism and the intermediate open / close use prevention mechanism are all housed inside the shutoff valve, but at least a part of the overflow prevention mechanism and the intermediate open / close use prevention mechanism is closed. Anything existing inside the valve may be used. The overflow prevention mechanism consists of an overflow shutoff valve and a cylinder that has the overflow shutoff valve in the valve seat for overflow shutoff.The reset mechanism is a reset body that rotates the knob in the closing direction. It is common to move the overflow shutoff valve from the shutoff valve seat to a position where it is separated. The intermediate opening / closing use prevention mechanism is a so-called ON-OFF type structure in which the gas flow passage is opened only at the fully open position to prevent malfunction of the overflow shutoff valve when the shutoff valve is half open. is there.

The “knob interlocking type” means that when an overflow occurs, the overflow cutoff valve comes into contact with the valve seat of the gas passage hole (valve seat for overflow cutoff) to cut off the gas. A type of reset mechanism that separates the shutoff valve from the valve seat. In other words, it has a structure that separates the overflow shutoff valve from the overflow shutoff valve seat by a reset body that operates in response to the rotation of the stop valve that interlocks with the knob.

The “circumferential groove” refers to a groove provided on the peripheral surface portion of the shutoff valve. This groove is a portion that is in contact with the valve seat of the closing valve above, below, or above and below the gas passage hole of the closing valve, and is provided in the same circumferential direction as the rotation direction of the closing valve. Although the size of the groove is not particularly limited, it is about 0.5 to 2.0 mm in width and 0.5 to 1.5 mm in depth. The number of circumferential grooves differs depending on the structure and size of the shutoff valve, and one or more circumferential grooves may be provided at one of the upper and lower portions of the gas passage hole. The valve seat that holds the shutoff valve in an airtight state is not particularly limited, and may be made of rubber or metal, for example. The circumferential groove is covered with this valve seat. The lubricant to be interposed between the shutoff valve and the valve seat is, for example, silicone oil when the valve seat is rubber and grease when the valve seat is metal.

[0011]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 shows an example of a shutoff valve 1 according to the present invention, in which a circumferential groove 3 is provided in a circumferential surface portion above a gas passage hole 2 provided in a circumferential surface portion of the shutoff valve 1. is there. The stop valve 1 is mounted on a valve seat 5 provided on the cock body 4 as shown in FIG. At this time, the circumferential groove 3 provided in the stop valve 1 is covered with the valve seat 5. By providing the circumferential groove 3, the silicon oil 10 interposed between the shutoff valve 1 and the valve seat 5 is accumulated in the circumferential groove 3. Therefore, by storing a large amount of silicone oil 10 in the circumferential groove 3 provided over the entire circumference of the shutoff valve 1, the silicone oil 10 can always be interposed between the shutoff valve 1 and the valve seat 5. Therefore, a constant low torque can always be maintained.

The purpose of providing the circumferential groove 3 in the shutoff valve 1 is mainly to retain the lubricant therein. However, when the circumferential groove 3 is loaded in the valve seat 5 formed of an elastic material such as rubber, the circumferential groove 3 is mainly used. The structural effect due to the provision of 3 can also be created. This is because when the closing valve 1 is pressed against the valve seat 5 with a large pressure in order to increase the airtightness between the closing valve 1 and the valve seat 5 as shown in FIG. This is because when the operation is not performed, the presence of the circumferential groove 3 serves as a space for escaping the strain of the valve seat 5 which is an elastic body. Therefore, it is possible to always apply a pressing force for maintaining the airtightness in an appropriate state, and it is possible to promote the effect of reducing the rotational torque of the stop valve 1. The shut-off valve 1 shown in this example is provided with one circumferential groove 3 above the gas passage hole 2 and one circumferential groove 3 below the gas passage hole 2. However, the above-mentioned effect is not limited to this example, and the circumferential valve 3 is not limited to this example. It suffices that the groove 3 exists on any part of the peripheral surface of the stop valve 1.

FIG. 4 shows an example of the fuse cock 6 using the shutoff valve 1 according to the present invention. The fuse cock 6 has an overflow safety mechanism 7 and an intermediate opening / closing prevention mechanism 8 built in the shutoff valve 1. The shut-off valve 1 shown in this example has a diameter of 18.8 mm at the upper end and 17.3 mm at the lower end. On the other hand, in the case of a general shutoff valve for a gas cock with an overflow safety mechanism that does not include the conventional intermediate opening / closing prevention mechanism, the upper end is 14.6 mm, the lower end is 12.6 mm, and the diameter is It will have to grow. However, by providing the circumferential groove 3 and using it as a lubricant reservoir, the diameter is large and the contact area with the valve seat 5 is large, but it is almost the same as the conventional gas cock with overflow safety mechanism. It is possible to open and close the stop valve 1 with a constant rotation torque.

The overflow safety mechanism 7 is a cylindrical cylinder 71 fixed to the cock body 4, and a ball valve 72 for shutting off the overflow is housed inside the cylinder 71. It has a structure in which the ball valve 72 is fitted into an overflow shutoff valve seat 73 provided on the upper end surface. When the ball valve 72 is fitted into the valve seat 73 due to overflow, the reset body 74 for resetting the ball valve 72 is lowered by rotating the stop valve 1 in the closing direction. The ball valve 72 is pushed and separated from the valve seat 73.

Further, the intermediate opening / closing use preventing mechanism 8 is a so-called ON-OFF type in which the opening and closing of the gas flow path is instantaneously performed. This is a mechanism for blocking the outflow of gas when the shutoff valve 1 is not located in the fully open position, and the overflow safety mechanism 7 malfunctions when the shutoff valve 1 is in the half open state. Is to prevent. In the intermediate opening / closing use preventing mechanism 8 shown in this example, a ring-shaped magnet 81 is arranged in a lower portion of a cylinder 71, and two legs 83 are extended downward on a disk 82 having a reset body 74 provided on a lower surface thereof. It has a structure in which a shield 85 in which the lower end portion of the leg 83 is provided with an actuating magnet 84 is externally fitted to the cylinder 71, and is provided at the upper end portion of the cylinder 71 for half-open shutoff. The disk 82 descends from the valve seat 86 and comes into contact with the disk seat 86, thereby interrupting the flow of gas during half-opening. In this case, the ball valve 72 is also reset at the same time.

The portion of the shield 85 on which the actuating magnet 84 is provided is fitted into the guide groove 87 provided at the lower end of the shutoff valve 1, rotates together with the shutoff valve 1, and moves along the guide groove 87. Move up and down. As for the operating state of this, when the closing valve 1 is rotated by the knob 9 from the closed position to the open position shown in the figure, the operating magnet 84 of the shield 85 which has been rotated to that position and the operating magnet 84 arranged at that position. Then, the actuating magnet 84 and the magnet 81 having the same polarity are repelled, the shield 85 rises, and the gas flows. A magnet 81 having a polarity different from that of the actuating magnet 84 is arranged in a portion other than the fully open position. When the shutoff valve 1 is in a half-opened state, the shield 85 is sucked downward without rising and the cylinder 71 is in a half-opened state. The flow of gas is blocked between the shutoff valve seat 86 and the lower surface of the disc 82. As described above, in the fuse cock 6 in which not only the closing valve 1 but also the shield 85 needs to be rotated at the same time, it is more significant to provide the circumferential groove 3 in the closing valve 1 in order to stably reduce the rotation torque. growing. Of course, the structure of the intermediate opening / closing use preventing mechanism 8 is not limited to this example, and any structure may be used as long as it has a structure for instantaneously opening / closing the gas passage.

[0018]

[Effect of device]

 As described above, the shutoff valve for a gas cock according to the present invention is a fuse cock in which the overflow safety mechanism for preventing the excessive outflow of gas and the intermediate opening / closing use prevention mechanism are built in the shutoff valve. Since it is configured to always rotate with a constant low torque regardless of the frequency of use, the operation of the safety mechanism is practically more reliable, the user is relieved, and the operation of closing the cock is recommended. It has a very beneficial effect in practice that it can be encouraged.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a stop valve for a gas cock according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which a stop valve is mounted on a valve seat.

FIG. 3 is a cross-sectional view showing a state in which a stop valve is mounted on a valve seat.

FIG. 4 is a sectional view showing an example of a fuse cock using the shutoff valve according to the present invention.

FIG. 5 is a sectional view showing an example of a fuse cock using a conventional shutoff valve.

[Explanation of symbols]

1 Stop valve 8 Intermediate open / close use prevention mechanism 2 Gas passage hole 81 Magnet 3 Circumferential groove 82 Disc 4 Cock body 83 Leg 5 Valve seat 84 Actuating magnet 6 Fuse cock 85 Shield 7 Overflow safety mechanism 86 Half open shutoff valve seat 71 Cylinder 87 Guide Groove 72 Ball Valve 9 Knob 73 Overflow Shutoff Valve Seat 10 Silicon Oil 74 Reset Body

Claims (1)

[Scope of utility model registration request] 1. A gas cock provided with a reset mechanism of a knob interlocking type having a structure in which an overflow safety mechanism and an intermediate opening / closing use preventing mechanism are built in a shutoff valve of the gas cock, the gas being provided on a peripheral surface portion of the shutoff valve. A stop valve for a gas cock, characterized in that a peripheral groove is provided on a peripheral surface portion that abuts a valve seat for keeping at least one of the upper and lower stop valves of the passage hole in an airtight state.