JPS6148031B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) This invention is installed, for example, in a kettle that connects a rubber pipe to a gas appliance or a lead-in stopper, and detects abnormal release of gas due to falling off or breakage of the rubber pipe, This invention relates to a device for resetting an activated safety valve to its original state in preparation for reuse in a safety valve device that automatically operates to stop abnormal discharge and prevent unexpected disasters.

(Prior Art) This invention has been made in order to focus on the following prior art and to eliminate the drawbacks inherent in these.

First, as a reset device of this kind, there is a technique disclosed in Japanese Patent Publication No. 51296/1983, which was previously proposed by the inventors of the present invention. As shown in FIG. 5, this structure includes a casing 5 having a gas inflow path 1, an outflow path 2, and a relay chamber 4 for installing an overflow prevention valve 3 in the middle between the two. A button 6 is provided and a cover 7 is placed over the button 6. This operation is performed when an abnormal flow rate of gas occurs in the gas inflow path 1, the spherical valve body V of the prevention valve 3 is activated and presses against the valve seat 8, blocking the gas flow path and preventing an unexpected situation. When the occurrence is prevented and the abnormal gas flow subsides, the reset button 6 is pressed from above the cover 7 or after removing the cover to return the spherical valve body V, which is in pressure contact with the valve seat 8, to its original state in preparation for reuse. This is how it was done. Although this structure works reliably, the biggest drawback is that the reset device must be installed at a location separate from the gas stopper. This naturally requires high installation costs, such as the need for plumbing for the reset device, requires the user to know how to operate the reset device at all times, and also requires that the reset device be reset without closing the tap. By operating the device, there is a risk of erroneous gas release in the event of misfire. In short, it is impractical to provide this type of reset device separately from the stopcock, and is unsuitable for actual use. In order to solve this drawback, the inventors of the present invention proposed a technique disclosed in Japanese Patent Application Laid-open No. 42824/1983. In this structure, as shown in FIG. 6, the main body 9 is formed into a substantially L-shaped longitudinal section consisting of a vertical passage 10 and a horizontal passage 11, an overflow prevention valve 12 is installed in the vertical passage 10, and the horizontal passage 11 is A closing member 13 is provided in the closing member 13, a hollow portion 14 is provided below the closing member 13, and the hollow portion 14 is connected to the partition wall 15.
It is made to face the vertical passage 10 on both sides. An eccentric pin 16 protruding from the bottom surface of the closure 13 in the cavity 14, a reset pin 17 pushed by the eccentric pin 16 and protruding from the partition wall 15 into the vertical passage 10, and a return spring 18 for returning the reset pin 17 to its original state.
Due to the abnormal outflow of gas, the excessive outflow prevention valve 12 is activated, and the spherical valve body V floats up and comes into pressure contact with the valve seat 19, and even though the abnormal situation has subsided, the spherical valve body V closes on the valve seat. 19, by rotating the opening/closing knob 20,
3 blocks the horizontal passage 11, and an eccentric pin 16 that rotates together with the eccentric pin 16 and a reset pin 17 that is pushed by this protrude deep into the vertical passage 10 and press the spherical body V to reset it to its original position. There is. With this structure, by rotating the opening/closing knob, the gas passage is shut off by the closure 13, and the reset device is automatically activated, returning the overflow prevention valve to its original state in preparation for reuse. As mentioned above, there is no need to install the reset device separately from the gas stopper or to operate it separately, which makes it more practical. The piping work is troublesome because the gas inflow passage and outflow passage must be formed in different directions, and furthermore, a space for installing the reset device must be provided separately from the gas passage. In addition, it becomes larger and requires processing such as installing an eccentric pin protruding from the bottom of the closure, and furthermore, the lid body 21 must be screwed in order to assemble these parts into the cavity 14. However, it has the disadvantage that it is troublesome to produce and very expensive.

In order to avoid this complicated structure, for example, an overflow prevention valve is installed in the gas passage close to the closure.
It is conceivable that a structure in which a spherical valve body pressed against a valve seat is directly pushed by a closing member by rotating the closing member to reset the valve body to its original state is conceivable. However, for an older technology that is relatively similar to this, see Publication No. 4337 of the Utility Model Registration Application published in 1944).This type of gas valve kettle differs from the water supply kettle in that it has a smooth closing mechanism and In order to maintain airtightness, sticky lubricating oil such as grease is attached to the outer circumferential surface of the closure, and when an overflow prevention valve is installed close to this closure, the lubricating oil flows into the spherical valve of the prevention valve. There is a risk that it may adhere to the body and interfere with the operation of the prevention valve, so this direct connection type reset device cannot be used in gas valves.

(Technical Problem) Therefore, in this invention, the overflow prevention valve can be installed in the gas valve socket without changing the structure of the conventional valve socket or with minimal changes. The technical challenge is to install a reset device.

(Technical Means) In order to solve the above technical problem, the present invention provides a gas inflow path 31 with a closure 30 that can be freely opened and closed.
A cylindrical valve body 34 is attached coaxially with the gas inflow passage 31 to the gas inflow passage 31 of the plug body 33 having a gas inflow passage 32 and a cylindrical valve body 3.
A spherical valve body V is accommodated in 4, and the gas inflow path 3 is normally
1 flows into the gas outlet passage 32 through the valve hole 35 of the cylindrical valve body 34, and when a gas amount exceeding the normal gas consumption appears on the gas inlet side, the abnormal gas flow pressure In the overflow prevention valve 37, which is pressed by the spherical valve body V to press against the valve seat 36 and cut off the gas flow path, there is a gap at one end between the closure 30 and the cylindrical valve body 34. A valve body pressing piece 40a is provided at the center and guide pieces 40b, 40b are provided at both ends thereof.
The reset plate 40, which has spring seats 40c, 40c formed at the intermediate portion thereof and an arcuate portion 40d at the other end thereof, is fitted into guide grooves 49, 49 formed on the inner wall of the gas passage 48. The reset plate 40 is interposed so as to be movable only in the axial direction.
The spring 38 is compressed by pressing one end against the spring seats 40c, 40c and the other end against the cylindrical valve body 34.
The arc-shaped portion 40d is always in contact with the closing member 30 due to the biasing force, and when the closing member 30 is in the closed state, it is pushed by the closing member 30 and moves, and the valve body pressing piece 40a presses the spherical valve body V. It is configured to be pressed.

(effect) The above technical means works as follows.

As shown in FIGS. 1 and 2, under normal conditions, the spherical valve body V rests on a large diameter portion of the cylindrical valve body 34, and the gas inflow path 3
and the outflow path 32 are opened in a coaxial state, and gas flows therethrough, but an abnormally high flow rate of gas occurs in the gas inflow path 31 due to, for example, a rubber tube connected to the gas outflow path 32 falling off. , the spherical valve body V moves within the valve body 34 due to this gas flow pressure, and the valve seat 36
When the valve hole 35 is closed by pressure contact with the spherical valve body V, the third
As shown in the figure, when the opening/closing knob 41 is rotated to close the closing member 30, the arcuate portion 40d is pushed by the closing member 30, and the reset plate 40 is moved toward the cylindrical valve body 34 side against the spring 38. Move to the valve body pressing piece 40
a presses the spherical valve body V exposed from the valve hole 35 of the cylindrical valve body 34 and returns it to the majority of the diameter of the cylindrical valve body 34. Since the reset plate 40 is interposed between the spherical valve body V and the closure 30, no lubricating oil such as grease from the closure 30 will adhere to the spherical valve body V, and the reset plate 40 Since they fit into the guide grooves 49, 49 and move only in the axial direction, they hardly affect the gas flow.

Therefore, when the reset device operates,
Since the closure member 30 is in the closed state and the gas flow path is blocked, the return of the spherical valve body V to its original state is not inhibited by the gas flow pressure.

In addition, the reset plate 40 has an arcuate portion 4 during normal operation.
0d fits into the plug hole 39 of the closure 30 and is held in that position, and at the time of operation, it is pushed against the outer surface of the closure 30 and moves, so that the closure does not move against the reset plate. It acts as a kind of cam, and the vicinity of the plug hole is in the valley of the cam.

(Effect of the invention) This invention has the following unique effects.

Since the reset device is installed in the gas flow path of the gas stopcock, the entire device can be stored compactly.

Piping work is easy because the gas inflow and outflow channels of the gas valve can be placed coaxially.

No special processing is required for the closure of the conventional structure, and no or minimal processing is required for the stopper body itself, resulting in extremely low manufacturing costs.

Since the spherical valve body is pressed in a straight line direction on the same axis by the valve body pressing piece of the reset plate, the spherical valve body is returned to its original position.
Operation is reliable and there is no risk of failure.

Since the reset device can be assembled by sequentially inserting the reset plate, spring and cylindrical valve body into the stopper body, assembly and disassembly are simple and maintenance is easy.

(Embodiment) FIGS. 1 to 4 show an embodiment of the present invention, in which reference numeral 33 is a stopper body, and the inner periphery of one end forming the gas inflow passage 31 is threaded with a tapered screw. 42 is carved, a gas pipe is connected to this, and the gas outlet passage 32 at the other end is
On the outer periphery of the other end forming a step 4 for connecting a rubber pipe.
3 is formed. 30 is a closure having a plug hole 39 and is rotated to open and close by an opening/closing knob 41. A cylindrical valve body 34 of an overflow prevention valve 37 is coaxially attached to the gas inflow path 31 of the stopcock body 33 via a packing 44 by screws or press-fitting, and the valve body 34 is made of brass or non-ferrous metal. A valve hole 35 and a valve seat 36 are provided at one end, a valve body receiving pin 45 is provided at the other end, and an opening 46 for gas circulation is provided at the middle of the valve body. A valve body stationary step portion 47 is provided, and a spherical valve body V made of synthetic resin, specifically nylon (particularly nylon 66), or stainless steel is made to rest on the large-diameter inner periphery on the side of the valve body receiving pin. It's getting old. A pair of guide grooves 49, 49 are formed in the inner wall of the gas passage 48 between the closure 30 and the cylindrical valve body 34, as shown in FIGS. 1 and 2. Between 49 and 49, synthetic resin board,
Alternatively, a reset plate 40 made of a brass plate or a stainless steel plate is movably fitted, and a pressure spring 3 is inserted between the reset plate 40 and the cylindrical valve body 34.
8 is interposed, and the reset plate 40 is urged by the pressing spring 38 and is always in contact with the closing member 30. As shown in FIG. 4, the reset plate 40 is formed into a substantially comb-shape, and one edge of the reset plate 40 is formed into a comb-like shape, and one edge of the reset plate 40 is connected to a valve pressing piece 40a in the center, guide pieces 40b, 40b at both ends, and a spring seat in the middle between these pieces. 40c, 40c, and the other end edge is formed into an arcuate portion 40d.

Therefore, as shown in FIGS. 1 and 2, when the plug hole 39 of the closure 30, the gas inflow path 31, and the outflow path 32 are in a coaxial state, the arcuate edge 40d of the reset plate 40 is aligned with the plug hole 39. The reset plate 40 is held in a state where it is bitten into the closure 30, and by rotating the closure 30 from this state, the arcuate portion 40d of the reset plate 40 is removed from the plug hole 39. It moves so as to come out, and presses the spherical valve element V by the valve element pressing piece 40a.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of one embodiment that best represents the present invention, Fig. 2 is a transverse plan view of the same, Fig. 3 is a transverse plan view showing the same operating state, and Fig. 4 is a perspective view of the main parts. , FIG. 5, and FIG. 6 are longitudinal sectional front views showing the prior art, respectively. 30... Closer, 31... Gas inflow path, 32...
Gas outlet passage, 33... Plug body, 34... Cylindrical valve body, 35... Valve hole, 36... Valve seat, V...
Spherical valve body, 37... Overflow prevention valve, 38... Spring, 39... Bung hole, 40... Reset plate, 40a
...Valve body pressing piece, 40b...Guide piece, 40c...
...Spring seat, 40d...Circular part, 48...Gas passage, 49...Guide groove.

Claims (1)

[Claims] 1 Gas inflow path 31 across a closure 30 that can be opened and closed
A cylindrical valve body 34 is attached coaxially with the gas inflow passage 31 to the gas inflow passage 31 of the plug body 33 having a gas inflow passage 32 and a cylindrical valve body 3.
A spherical valve body V is accommodated in 4, and the gas inflow path 3 is normally
1 flows into the gas outlet passage 32 through the valve hole 35 of the cylindrical valve body 34, and when a gas amount exceeding the normal gas consumption appears on the gas inlet side, the abnormal gas flow pressure In the overflow prevention valve 37, which is pressed by the spherical valve body V to press against the valve seat 36 and cut off the gas flow path, there is a gap at one end between the closure 30 and the cylindrical valve body 34. A valve body pressing piece 40a is provided at the center and guide pieces 40b, 40b are provided at both ends thereof.
The reset plate 40, which has spring seats 40c, 40c formed at the intermediate portion thereof and an arcuate portion 40d at the other end thereof, is fitted into guide grooves 49, 49 formed on the inner wall of the gas passage 48. The reset plate 40 is interposed so as to be movable only in the axial direction.
The spring 38 is compressed by pressing one end against the spring seats 40c, 40c and the other end against the cylindrical valve body 34.
The arc-shaped portion 40d is always in contact with the closing member 30 due to the biasing force, and when the closing member 30 is in the closed state, it is pushed by the closing member 30 and moves, and the valve body pressing piece 40a presses the spherical valve body V. A valve body reset device for an overflow prevention valve configured to be pressed.