JPS598058Y2 - Gas cock with automatic shutoff valve - Google Patents

Description

[Detailed description of the invention] The present invention is an improvement of a gas cock with an automatic shutoff valve that is installed in a gas supply pipe to a gas appliance and can prevent abnormal release of gas that occurs in the event of an abnormality in the gas supply pipe. Regarding.

Generally, this type of gas cock is
No., Utility Model No. 54-19331, Utility Model No. 54-1933
As proposed in publications such as No. 2, a cock body having a gas passage, and a closure that is installed airtightly and rotatably in the inner hole of the cock body and opens and closes the gas passage by rotating operation. , an operating mechanism that is assembled to the cock body and rotates the closure, and a ball-shaped valve body that is installed in the gas passage on the upstream side of the closure and floats up due to excess gas flow and seats on the valve seat to close the gas passage. Equipped with an automatic shut-off valve.

For this reason, in this type of gas cock, when the operating mechanism is rotated (opened), the closure rotates and the gas passage opens, and gas is supplied to the gas appliance through the connected rubber pipe, for example. to reversely rotate the operating mechanism (
When the closing operation is performed, the closing member rotates in the opposite direction, closing the gas passage and stopping the gas supply to the gas appliance.

On the other hand, if an abnormality occurs such as the rubber tube falling off or being damaged during gas supply, the valve body of the automatic shutoff valve will float up due to the large pressure of excess gas flowing through the gas passage in the cock body, causing the valve body to float to the gas passage. The gas valve is seated on a valve seat provided in the valve seat and closes the gas passage to prevent abnormal gas release.

However, in this gas cock, the closing member can be stopped at any position within the range from fully closed to fully open by rotating the operating mechanism, so the degree of opening of the gas passage can also change each time.

Therefore, the gas pressure that acts to float the valve body during an abnormality also varies accordingly.

Therefore, it is important to set the valve body so that it floats up properly regardless of the gas action force generated in the gas passage at any opening degree, but this is practically difficult, and the automatic shutoff valve There is a possibility that it may not operate properly depending on the opening state.

The present invention was developed to address such problems, and its main purpose is to be able to reliably maintain the opening degree of the gas passage of this type of gas cock at either full open or fully closed. To provide a gas cock with an automatic shutoff valve that can operate properly.

In order to achieve this object, the present invention provides a gas cock with an automatic closing valve of this type, in which a torsion spring is interposed between the cock body and the closing member to bias the closing member in the direction of closing operation. The element is installed between the element and the operating mechanism so as to be movable in the radial direction of the upper part of the element and is biased radially outwardly by a spring, so that the tip of the element is elastically attached to the circumferential surface of the inner hole of the cock body. a locking plate portion that abuts and rotates integrally with the closing member; and a locking plate portion that is provided integrally with the locking plate portion and that engages with a portion of the operating mechanism and moves radially outward. A locking member having an arm portion for returning the plate portion to its original position by the closing operation of the operating mechanism is interposed, and a locking plate portion of the locking member is provided on the circumferential surface of the inner hole of the cock body. A locking groove into which the tip can be elastically inserted and engaged is provided, and the tip of the locking plate portion of the locking member engages with the locking groove at the end of the opening operation of the operating mechanism. The feature lies in that the engagement is released at the initial movement of the closing operation of the operating mechanism.

As a result, in the present invention, when the operating mechanism is opened and the closing member rotates against the torsion spring and reaches the fully open position, the locking plate portion of the locking member rotates integrally with the closing member. The distal end thereof faces the locking groove, and the locking plate portion moves radially outward so that the distal end thereof engages with the locking groove.

Therefore, when the operation of the operating mechanism is stopped, the closing member is prevented from rotating in the opposite direction by the locking member and is reliably held at its fully open position.

On the other hand, when the operating mechanism is closed in this state, the locking member moves radially inward with its arm and returns to its initial position, so the tip of the locking plate and the locking groove are protected. The connection is canceled.

For this reason, it goes without saying that you can close the door by closing the operating mechanism.
Even if the closing operation is stopped, the biasing force of the torsion spring will cause the valve to rotate in the opposite direction and reliably return to the fully closed position.

Therefore, according to the present invention, the gas cock can always be kept either fully closed or fully open, so that the opening degree of the gas passage is constant, and the automatic shutoff valve can be properly operated. .

Further, in the present invention, the above-mentioned torsion spring, locking member, locking groove, etc. can all be housed inside the cock body, and such a useful gas cock can be provided in a small size without increasing the size.

Hereinafter, the present invention will be explained based on the drawings. FIGS. 1 and 3 show an example of a gas cock with an automatic shutoff valve according to the present invention.

This gas cock includes a cock body 10 having a gas passage, a closure 20 assembled into the cock body 10, an automatic shutoff valve 30 interposed in the upstream gas passage of the closure 20, and a closure 20.
It is controlled by an operating mechanism 40 that rotates the .

The cock body 10 includes a lower cylindrical member 11 having a stepped inner hole 111 and airtightly connected to a gas pipe or the like installed indoors;
It consists of an upper cylindrical member 12 airtightly attached to the upper surface of a lower cylindrical member 11, and the upper cylindrical member 12 has a tapered portion 12a having a tapered inner hole 121, and is in communication with the inner hole 121. The cylindrical portion 12b has a large diameter inner hole 122.

Further, on the outside of the tapered portion 12a of the upper cylindrical member 12,
A connecting pipe portion 12C having an inner hole 123 communicating with the inner hole 121 is provided, and two locking grooves 124 are formed at the upper end of the cylindrical portion 12b.

As shown in FIG. 1, FIG. 3, FIG. 5, and FIG.
1, and a cylindrical part 22 which extends to the lower end of the tapered part 21 and has a smaller diameter, and has an inner hole 23 opening to the lower end and the outside.

Further, an operating mechanism 40 is provided at the upper end of the tapered portion 21 of the closure 20.
Two large concave grooves 211 into which the rotor 41, which will be described later as a component or component, are assembled are provided with an interval of 180 degrees, and a locking component which is a component or component of the main part of the present invention is provided. Member 50
Each groove 211 has two small grooves 212 into which it is assembled.
They are provided at an interval of 180° at an intermediate position.

This closure 20 is connected to a tapered inner hole 121 of the cock body 10.
The outer opening 231 of the inner hole 23 of the closure 20 is positioned to face the inner hole 123 of the connecting pipe portion 12C of the cock body 10.

As a result, inside the cock body 10, a stepped inner hole 111,
Inner hole 23 of the closure 20 and inner hole 123 of the connecting pipe portion 12C
A gas passage is formed by the rotation of the closing member 20 in forward and reverse directions 90' to open and close the gas passage.

The automatic shut-off valve device 30 (hereinafter referred to as a shut-off valve device) is a first
As shown in FIGS. 3 and 3, a guide tube 31 is screwed onto the step 112 in the lower cylindrical member 11 of the cock body 10 in an airtight manner, and an annular guide tube 31 is provided inside the upper end of the guide tube 31. A ball-shaped valve body 32 that can be seated on a valve seat 311 and a guide tube 3
1 and a receiving pin 33 that is attached to the lower end of the valve body 32 and prevents the valve body 32 from coming off from the guide cylinder 31.

A plurality of through holes 312 are formed approximately at the center of the outer periphery of the guide tube 31 to allow gas to flow out.

The valve body 32 has a spherical shape slightly smaller than the inner diameter of the guide cylinder 31, and its weight is set as follows.

That is, the valve body 32 is supported by the receiving pin 33 when the gas cock is fully open, the connection with the gas appliance is normal, and the downstream side of the gas passage is at a predetermined gas pressure. When an abnormality occurs in the connection state, for example, when the rubber tube connected to the connecting pipe section 12C of the Kotuku main body 10 falls off or breaks and the gas pressure drops abnormally, the gas pressure on the upstream side of the gas passage surface, third
It is set to be seated on the valve seat 311 as shown by the imaginary line in the figure.

Therefore, when an abnormality occurs on the downstream side of the gas passage, the valve body 32 closes the gas passage to prevent abnormal release of gas.

As shown in FIGS. 1 and 3, the operating mechanism 40 includes a rotor 41 attached to the closure 20, and a rotor 41 that is elastically attached to the rotor 41 via a spring 42 and slides in the axial direction. A cock shaft 4 that is movable and rotatable integrally with the rotor 41
3, each locking protrusion 441 is fitted into the locking groove 124 of the cylindrical portion 12b of the cock body 10 to prevent the cock shaft 43 from coming off, and when the closing member 20 is in the closed state, the cock shaft A support member 44 that supports 43 in a slidable manner
and an operating knob 45 that is assembled to the tip of the cock shaft 43 and integrally pushes and rotates the cock shaft 43.

As shown in FIGS. 1, 3, 5, and 6, the rotor 41 is provided with two L-shaped locking protrusions 41a on its outer side. One end of each leg portion 411 is loosely fitted into each groove 211 of the closure 20.

Each leg portion 411 is formed to be extremely thin compared to the width of each groove 211, and has a required degree of freedom in a loosely fitted state.

Furthermore, two locking protrusions 4 are provided on the outside of the lower end of the cock shaft 43.
31 are formed with an interval of 180 degrees, and when the gas cock is in the closed state, each locking protrusion 431 is held at the lower end of the support member 44 by the elastic force of the spring 42, as shown in FIG. It fits into two locking grooves 442 provided in the.

As a result, in the gas cock, the operation knob 4
5, the cock shaft 43 is pushed down and its locking protrusion 431 is disengaged from the locking groove 442 of the support member 44.
The operating knob 45 and the cock shaft 43 become rotatable.

When the operating knob 45 is rotated 90 degrees counterclockwise in this state (opening operation), the cock shaft 43, the rotor 41, and the closing member 20 rotate integrally.

As a result, the outer opening 231 of the closure 20 and the cock body 10
The inner hole 123 of the connecting pipe portion 12C faces the gas cock, and the gas cock is in an open state as shown in FIG.

Note that the reference numeral 46 shown in FIGS. 1 and 3 is a spring that urges the closure 20 downward, and the reference numeral 47 is a spring receiver placed on the upper peripheral edge of the closure 20.

Therefore, a locking member 50 is provided between the closure 20 and the rotor 41.
is interposed.

As shown in FIGS. 5 and 6, the locking member 50 is composed of two locking plates 51 having the same shape.

Each locking plate 51 includes a locking plate portion 511 having a recess 51a at the center of the lower end, an arm portion 512 extending outward and upward from the upper end side of the locking plate portion 511, and a portion of the recess 51a. It is shaped by a receiving piece 513 fixed to the end face at a substantially right angle.

Each locking plate 51 is fitted with a ring spring 61 supported between each receiving piece 513 in its recess 51a in a close symmetrical manner with respect to the center point, and the locking plate portion 511 is fitted. It is inserted into each groove 212 of the closure 20 and assembled.

The outer diameter of the ring spring 61 is equal to the recess 51 of the locking plate 51.
The shape is larger than the length of a, and the locking plate portion 5
11 has a length that can come into contact with the circumferential surface of the tapered inner hole 121 of the cock body 10.

Therefore, in this state, the ring spring 61 is bent and fitted between the receiving pieces 513 in a reduced diameter state, and its repulsive force forces the tip of each locking plate portion 511 into the tapered inner hole 121. It is designed to come into elastic contact with the circumferential surface of.

On the other hand, on the upper peripheral surface of the tapered inner hole 121 of the cock body 10, there are grooves that face the grooves 211 of the closure 20 when the gas cock is in the leap state, and which are opposed to the grooves 211 of the closure 20 when the gas cock is in the open state. Two locking grooves 62 are formed opposite to the locking grooves 212 into which the tips of the locking plate portions 511 can be fitted.

Moreover, between the cylindrical part 22 of the closure 20 and the cock body 10,
A torsion spring 63 is interposed to bias the closing member 20 in the direction of the closing operation.

In the gas cock configured in this manner, the closed state is as shown in FIGS. 1 and 2, and when the operating knob 45 is pushed and rotated to open, the closing member 20
rotates against the torsion spring 63, and when rotated 90 degrees, the gas cock becomes fully open as shown in FIGS. 3 and 4.

Thus, when the closure 20 rotates, each locking plate 51 is integrated with the closure 20 with the tip of the locking plate portion 511 elastically abutting against the circumferential surface of the tapered inner hole 121. Rotate to 9
When each concave groove 212 of the closure 20 faces each locking groove 62 after rotating by 0°, each locking plate 51 slides outward in opposite directions due to the elastic force (returning force) of the ring spring 61. It moves and is elastically fitted into and engaged with each of the locking grooves 62.

As a result, the rotation of the closure 20 is restricted, and the gas cock becomes fully open.

In this state, the closing element 20 is biased in the direction of the closing operation by the torsion spring 63, and each leg 411 of the rotor 41 is in the state shown in FIG. are in contact with each other.

On the other hand, when the operating knob 45 is slightly closed (clockwise) with the gas cock in the fully open state, the rotor 41
is rotated by the required amount corresponding to the width of the concave groove 211 of the closure 20,
At this time, each leg 411 of the rotor 41 comes into contact with each arm 512 of each locking plate 51 and pushes them inwardly by a required amount.

As a result, each of the locking plates 51 is mutually slid inward against the ring spring 61, and the engagement of each of the locking plates with the respective locking grooves 62 is released, and the closing member 20 is moved toward the torsion spring 61. The return force causes the rotor 41, cock shaft 43, and operating knob 45 to return integrally, and the gas cock automatically returns to the fully closed state shown in FIG.

The ring spring 61 is pressed by each receiving piece 513 of each locking plate 51, and in a bent state, its diameter is reduced to the size range of the recess 51a of each locking plate 51, and the ring spring 61 is fitted. do.

In this way, in this gas cock, the closing member 20 is urged in the closing direction by the torsion spring 63, and each of the locking plates 51, which can rotate integrally with the closing member 20, is moved inside the tapered shape by the ring spring 61. Resiliently abut against the circumferential surface of the hole 121, and elastically engage the tip of each locking plate portion 511 with each locking groove 62 at the end of the opening operation of the operating knob 45, Moreover, the engagement is released at the initial movement of the closing operation.

Therefore, it is possible to ensure that the gas cock is fully opened, and when the operation knob 45 is closed and the operation knob 45 is
When the gas cock stops between the fully closed and fully open states, the returning force of the torsion spring 63 automatically returns the gas cock to the fully closed state.

As a result, the gas cock can always be maintained in either the fully closed or fully open state, and if the ball-shaped valve body 32 is set to operate in the event of an abnormality when the gas cock is in the fully open state, the automatic shutoff valve device 30 can be properly operated. It works reliably.

Further, in the gas cock, a locking member 50, a ring spring 61. Since the locking groove 62, torsion spring 63, etc. can all be housed inside the cock body 10,
The gas cock can be provided in a small size.

In the above embodiment, two locking plates 51 are used as locking members, and a ring is used as a means for elastically bringing each locking plate 51 into contact with the circumferential surface of the tapered inner hole 121. Although the example employing the spring 61 has been shown, it goes without saying that the locking plate 51 and the ring spring 61 may be modified as appropriate in the present invention.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an example of a gas cock according to the present invention in a closed state, FIG. 2 is a cross-sectional view taken along line II--II in FIG. 1, excluding the springs 42, 46 and spring receiver 47, and FIG. is a vertical cross-sectional view of the gas cock in the open state shown in FIG. 1, and FIG. 4 is a vertical sectional view of FIG.
FIG. 5 is an exploded perspective view of each structural member showing the essential parts of the present invention, and FIG. 6 is an enlarged perspective view of each structure or member assembled. Explanation of symbols, 10... Cook body, 20...
... Closing valve, 30... Sliding shutoff valve, 40...
...Operating mechanism, 41...Rotor, 51...
...Latching plate, 511...Latching plate part, 512...
...Arm part, 61...Ring spring, 6
2...Latching groove, 63...Torsion spring.

Claims (1)

[Scope of utility model registration request] A cock body having a gas passage; a closing element that is airtightly and rotatably assembled into an inner hole of the cock body and opens and closes the gas passage by rotational movement; and a closing element that is assembled to the cock body and rotates the closing element. a gas cock equipped with an operating mechanism for operation, and an automatic shutoff valve having a ball-shaped valve body that is interposed in the gas passage on the upstream side of the closer and floats due to an excess gas flow and seats on a valve seat to close the gas passage; A torsion spring is interposed between the cock body and the closing member to bias the closing member in the direction of the closing operation, and a torsion spring is provided between the closing member and the operating mechanism on the upper part of the closing member in the radial direction thereof. a locking plate portion that is movable and assembled with a spring biased outward in the radial direction, the tip of which elastically contacts the circumferential surface of the inner hole of the cock body, and rotates integrally with the closing member; an arm that is integrally provided on the locking plate and that engages with a part of the operating mechanism and returns the locking plate that has moved radially outward to its original position by a closing operation of the operating mechanism; A locking member having a locking member is interposed therebetween, and a locking groove is provided on the circumferential surface of the inner hole of the cock body, into which a tip of a locking plate portion of the locking member can be elastically inserted and engaged. The tip of the locking plate portion of the locking member is configured to engage with the locking groove at the end of the opening operation of the operating mechanism, and the engagement is released at the beginning of the closing operation of the operating mechanism. A gas cock with an automatic shutoff valve, which is characterized by: