JPH0331884Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention cuts off the gas supply if gas leaks into the atmosphere without any equipment connected due to disconnection or rupture of the gas pipe. This relates to technology used in gas tanks equipped with safety devices.

[Prior art] In recent years, when a gas pipe in a gas tank comes loose and gas leaks into the atmosphere without any equipment being connected, the overflow of gas caused by this leak causes gas pressure to rise. A safety shutoff valve that closes is provided to prevent gas from escaping if the gas pipe is accidentally or intentionally removed. By the way, in a gas tank, it is mandatory to provide an opening/closing means that opens and closes the flow of gas by rotating the operating knob, but with this kind of opening/closing means, there is a gap between fully open and fully closed. The gas flow rate can be reduced with . For this reason, if the gas pipe comes off with the closure fully open, the safety shutoff valve will be closed due to excessive gas flow, but if the gas flow rate is restricted between fully open and fully closed, the gas flow will be interrupted. If the amount is too small, the safety shutoff valve may not close, which is dangerous.

In addition, there is no safety shutoff valve that shuts off the gas in case of overflow, but gas can only flow when the closure is fully open. There is one disclosed in Publication No. 53-16662.

[Problems to be solved by the invention] In any case, the conventional technology does not have a gas tank equipped with both a safety shutoff valve that shuts off when gas overflows and a valve that closes when the closure is not fully open. There was a problem with safety. Further, when a safety shutoff valve is provided, it is necessary to reset the safety shutoff valve after it has been activated, but there is no mechanism for easily performing this reset. Furthermore, in Japanese Utility Model Publication No. 37-31696 and Japanese Utility Model Publication No. 53-16662, the mechanism that opens only when the closure is fully open and closes at other times opens and closes the gas flow passage according to the rotation of the operating section that opens and closes the closure. The mechanism is to open and close the valve, and a mechanism for interlocking the valve and the operation part is required outside the gas flow path, which results in a problem that the structure of the gas tank becomes complicated and large.

The present invention was developed in view of the above points, and the purpose of the present invention is to ensure that gas flows only when the closure is fully open, and that gas does not flow out when the gas pipe is disconnected or the gas pipe is ruptured. If overflow occurs, the safety shut-off valve will surely shut off the flow, and it can be easily reset after the safety shut-off valve is activated.Furthermore, even if there is a valve body that opens only when fully open, the structure of the gas tank will not be complicated and can be made compact. We provide gas stoves with safety devices.

[Means for Solving the Problems] In order to achieve the above object, the gas tank equipped with a safety device of the present invention has a gas tank equipped with a safety device that opens and closes the flow of gas by rotating the operating knob 1 and rotating the closing member 2. Gas flow direction and closure 2 in flow path 3
Closer 2 is arranged so that the axial direction of
A valve seat 5 is formed in the gas flow passage 3 so as to face the end face of the closure 2, and a valve body 6 capable of opening and closing the valve seat 5 is arranged on the closure 2 side of the valve seat 5, so that the closure 2 and the valve A valve body drive mechanism B that separates the valve body 6 from the valve seat 5 only when the body 6 is fully opened is operated by an interlocking element 7 that rotates together with the closing body 2, and an interlocking element 7 that rotates together with the closing body 2. A cylindrical actuator 8 is actuated by the rotation of the actuator 8, an outer cylinder 9 guides the movement of the valve body 6, and an interlocking element 7 which is interposed between the outer cylinder 9 and the actuator 8. It is composed of an actuator biasing spring 10 that biases the valve body toward the side, and a valve body bias spring 11 that is interposed between the valve body 6 and the interlocking element 7 and biases the valve body 6 toward the valve seat 5. , the actuator 8 is attached to the surface of the interlocking element 7 on the actuator 8 side.
A driving protrusion 7b protruding to the side is provided, and a fitting recess 8a in which the driving protrusion 7b fits into the surface of the actuator 8 facing the interlocking element 7 when the closing element 2 is in the open state and a fitting recess 8a in which the closing element 2 is in the closed state. A flat surface 8b is provided on which the tip of the driving protrusion 7b comes into contact, and when the closing member 2 rotates from the closed state to the open state, the tip of the driving protrusion 7b is engaged and the interlocking element 7 and the actuator 8 are kept constant. The small locking protrusion 8c is connected to the flat surface 8b of the actuator 8 and the fitting recess 8 so that they rotate at the same angle.
a and the cylindrical part 6 on the closing member 2 side of the valve body 2.
d is arranged on the inner periphery of the actuator 8, and the positional relationship between the valve body lifting protrusion 8f protruding from the inner periphery of the actuator 8 and the lifted protrusion 6e protruding from the outer periphery of the cylindrical portion 6d of the valve body 2. , when the actuator 8 is pushed toward the valve body 6 by the driving protrusion 7b of the interlocking element 7, the valve body lifting protrusion 8
f is located closer to the valve seat 5 than the lifted projection 6e, and the actuator 8 is connected to the valve body 2 by the driving projection 7b of the interlocking element 7.
When not pushed to the side, the lifted projection 6e is located closer to the valve seat 5 than the valve body lifting projection 8f, and the closing member 2
The valve body lifting protrusion 8f is opened only when the drive protrusion 7b of the interlocking element 7 is fitted into the fitting recess 8a when the valve body is fully opened.
The circumferential position of the lifted protrusion 6e is made to correspond to the position of the lifted protrusion 6e, and the valve body 6 is separated from the valve seat 5 only when the valve body lifting protrusion 8f and the lifted protrusion 6e are engaged, thereby preventing overflow of gas. The valve of the safety shutoff valve 4, which is closed by gas pressure at times, is constituted by a rolling valve ball 28, and the valve ball 28 is arranged on the opposite side of the valve body 6 of the valve seat 5, so that the valve ball 28 closes when overflow occurs. When the valve body 6 closes the valve seat 5 with the valve ball 28 closed, the valve ball 28 is separated from the valve seat 27.

[Function] In conjunction with the closure 2, the valve body 6 separates from the valve seat 5 only when fully opened, allowing gas to flow, and the safety shutoff valve 4 operates reliably in the event of gas leakage due to gas pipe disconnection or rupture, etc. The combination of the closing member 2, interlocking element 7, actuator 8, outer cylinder 9, actuator biasing spring 10, valve body biasing spring 11, and valve body 6 has a simple structure so that the valve body 6 opens only when fully opened. Furthermore, the safety shutoff valve 4 is activated and the valve ball 2 is closed.
8 closes the valve seat 27, the valve body 6 can be used to remove the valve ball 28 and reset by simply closing the closure 2.

[Example] A is a gasket housing, and the first housing A ₁ ,
It is composed of a second casing A ₂ and a third casing A ₃ , which are integrated by being connected with screws 12 .
An operating knob 1 is rotatably mounted on the outer surface of the first housing _A1 , and a bevel gear 14 is mounted on a knob shaft 13 that is integrally provided with the operating knob 1. In addition, the first housing A ₁ has an interlocking shaft 1 orthogonal to the knob shaft 13.
5 is rotatably mounted, and the bevel gear 16 provided on the interlocking shaft 15 and the bevel gear 14 are meshed. The end of the interlocking shaft 15 on the second casing _A2 side protrudes from the first casing _A1 , and a split groove-shaped closure locking groove 17 is provided at this end. The second housing _A2 has a plug 1 that can be detachably connected to a gas socket.
8 is provided protrudingly, and the plug 18 and the second housing A ₂
The inner gas flow passage 3 communicates orthogonally. A closure 2 is rotatably attached to a portion where the plug 18 and the gas flow passage 3 intersect at right angles so that its axial direction is parallel to the gas flow passage 3, and the closure 2 is closed by rotating the closure 2. They communicate through the communication hole 19 of the child 2 or are closed by the closure 2. A locking protrusion 20 is provided on the end surface of the closure 2 on the side of the first housing A ₁ to lock the first housing A ₁ and the second housing A ₂ in an integrated state. The protrusion 20 is engaged with the closure locking groove 17 of the interlocking shaft 15, so that the interlocking shaft 15 and the closure 2 are interlocked.
However, when operating knob 1 is rotated, knob shaft 1
3. The closure 2 is configured to rotate via the bevel gear 14, the bevel gear 16, and the interlocking shaft 15. Here 2
Reference numeral 1 denotes a sealing spring interposed between the closure 2 and the interlocking shaft 15, which biases the closure 2 so that it comes into airtight contact with the closure rotation hole 22. A pair of locking protrusions 23 are provided on the end surface of the closure 2 opposite to the locking protrusion 20. The second gas flow passage 3 in the third housing A ₃
A valve hole 25 is bored at the end of the housing _A2 ,
A safety shutoff valve 4 is provided in the third casing _A3 , which is closed due to overflow of gas. The main body of the safety cutoff valve 4 includes a guide cylinder 26, a valve seat 27, and a valve ball 28 that closes the valve seat 27. Valve hole 25
The third housing A ₃ side surface is a valve seat 27, a guide cylinder 26 is integrally extended from around the valve seat 27, and a valve ball 28 is rotatably housed inside the guide cylinder 26. A small protrusion 29 is provided in the guide cylinder 26 to prevent the valve ball 28 from coming off and to prevent the valve ball 28 from moving toward the valve seat 27 under normal pressure. However, gas flow passage 3
When the gas flowing through exceeds a certain level, the valve ball 28 is pushed by the gas pressure, and the valve ball 28 comes into contact with the valve seat 27, closing the valve hole 25 and cutting off the gas flow. When the valve ball 28 comes into contact with the valve seat 27, the valve ball 28 enters the valve hole 25, and the second housing of the valve hole 25 is closed.
The valve ball 28 slightly protrudes from the valve seat 5 on the _A2 side. A valve body 6 is arranged so as to face the valve seat 5 on the _second housing A2 side, and the valve body 6 can freely come into contact with and separate from the valve seat 5. The valve body 6 is composed of a valve body 6a and a rubber contact plate 6b. A valve element drive mechanism B is installed between the valve body 6 and the closure 2 to open the valve body 6 only when the closure 2 is fully opened. This valve body drive mechanism B is mainly composed of a valve body 6, an interlocking element 7, an actuator 8, an outer cylinder 9, an actuator biasing spring 10, and a valve body biasing spring 11.
The interlocking element 7 is formed into a substantially disk shape, and a pair of locking recesses 7a are provided on one side. The locking protrusion 23 of the closing member 2 is locked in this locking recess 7a, so that the interlocking member 7 rotates together with the closing member 2. On the other side of the interlocking element 7, four chevron-shaped drive protrusions 7b are provided at equal intervals in the circumferential direction. The actuator 8 is formed in a cylindrical shape, and four fitting recesses 8a into which the drive protrusions 7b can fit are provided at equal intervals in the circumferential direction on one end surface of the actuator 8. A flat surface 8b is formed between the portions 8a, and a small locking projection 8c is provided at one end of the flat surface 8b. A pair of regulating protrusions 8d are protruded from the outer peripheral surface of the actuator 8, and a spring receiving step 8e is disposed around the other end of the regulating protrusions 8d. Four valve body lifting protrusions 8f are provided on the inner periphery of the actuator 8 so as to correspond to the fitting recesses 8a. The outer cylinder 9 is formed into a substantially cylindrical shape, and has a pair of symmetrical notches 9a protruding from one end thereof, and a pair of positioning protrusions 9b protruding from the outer periphery of the other end. A spring receiving step 9c is provided on the inner periphery of the outer cylinder 9 on the side where the positioning protrusion 9b is provided.
A sliding groove 9d is bored in the axial direction near c. A pair of sliding protrusions 6c are symmetrically protruded on the outer periphery of the valve body 6a of the valve body 6 on the contact plate 6b side.
Four lifted protrusions 6e are provided on the outer periphery of the cylindrical portion 6d of the valve body 6a at equal intervals in the circumferential direction.
Both the actuator biasing spring 10 and the valve body biasing spring 11 are coil springs, and the spring force of the actuator biasing spring 10 is stronger than that of the valve body biasing spring 11. The outer cylinder 9 is installed inside the gas flow path 3 of the second housing A ₂ with the notch 9a side facing the closing member 2, and the positioning protrusion 9b is fitted into the positioning recess 24 of the second housing A ₂ . The outer cylinder 9 is positioned and placed inside so that it does not rotate. The actuator 8 is housed in the outer cylinder 9 so that the fitting recess 8a side faces the interlocking element 7, and the regulating protrusion 8d of the actuator 8 is positioned within the notch 9a. The valve body 6 is housed within the outer cylinder 9 so that the contact plate 6b faces the valve seat 5, and the sliding protrusion 6c is slidably disposed in the sliding groove 9d. Actuator biasing spring 1
0 is interposed between the spring receiving step portion 8e and the spring receiving step portion 9c. When the closing element 2 is in the fully open state, the driving protrusion 7b of the interlocking element 7 is in contact with the flat surface 8b of the actuating element 8, as shown in FIGS. 8a and 9a, and the valve body 6 is closed by a valve body biasing spring 11. At this time, the valve body lifting protrusion 8 of the actuator 8
f is located closer to the valve body 6 than the lifted protrusion 6e of the valve body 6, and their positions are shifted from each other. Next, when the closing member 2 is rotated in the fully open direction from this state, the drive protrusion 7b slides on the flat surface 8b and engages the small locking protrusion 8c.
to be locked. When the closing element 2 further rotates in the opening direction from this state, the actuating element 8 is moved together with the interlocking element 7 as shown in FIGS. Rotate. In other words, the regulating protrusion 8d rotates by an angle that allows it to move within the notch 9a. Then, with the regulating protrusion 8d in contact with the other side of the notch 9a, the closing member 2 rotates until it is fully opened, and the valve body lifting protrusion 8f of the actuator 8 corresponds to the lifted protrusion 6e of the valve body 6. When the closing member 2 is further rotated from this state to the fully open state, the drive protrusion 7b and the small locking protrusion 8c are disengaged, and the actuator biasing spring 1
With a spring force of 0, the driving protrusion 7b and the fitting recess 8a are fitted into each other as shown in FIGS. 8c and 9c, and the actuator 8 is brought into close contact with the interlocking element 7. When the actuator 8 moves to the interlocking element 7 side, the valve element 6 moves to the actuator 8 side against the valve element biasing spring 11 while the valve element lifting projection 8f and the lifted projection 6e are locked. Valve body 6 is valve seat 5
The valve hole 25 is opened away from the valve. Also, when the closing member 2 is slightly rotated from the fully open state to the closing direction, as shown in Fig. 9d.
As shown, the valve body lifting protrusion 8f and the lifted protrusion 6e
The valve body 6 is disengaged from the valve body 6, and the valve body 6 moves toward the valve seat 5 by the spring force of the valve body biasing spring 11 and comes into contact with the valve seat 5, thereby closing the valve hole 25. When the closing element 2 is rotated in the closing direction from this state, the actuator 8 rotates together with the interlocking element 7, and the rotation of the actuator 8 stops when the regulating protrusion 8d hits the notch 9a on one side edge. When the interlocking element 7 is stopped and the interlocking element 7 further rotates together with the closing element 2, the driving protrusion 7b climbs over the small locking protrusion 8c and reaches the flat surface 8b.
leading to. At this time, the actuator 8 is separated from the interlocking element 8, and the valve body lifting projection 8f is located closer to the valve body 6 than the lifted projection 6e.

Next, the operation of the gas tank equipped with the safety device of the present invention constructed as described above will be explained. The gas flow path 3 of the third housing A ₃ is connected to the gas source pipe side, and the plug 18 is connected to a socket of a gas hose that communicates with an appliance. When the operating knob 1 is turned here, the closing member 2 rotates and communication through the communication hole 19 of the closing member 2 is opened and closed. Unless the operation knob 1 is set to the fully open position, the valve body 6 is in contact with the valve hole 25 and gas does not flow therethrough. When the operating knob 1 is fully opened, the closing member 2 is fully opened and a large amount of gas flows through the communication hole 19. On the other hand, when the closure 2 is fully open,
The valve body 6 is separated from the valve seat 5 and the valve hole 25 is opened. Then, the gas flow passage 3, the valve hole 25, the closure 2,
Gas is supplied via plug 18. At this time, the safety shutoff valve 4 is open. Next, when the operating knob 1 is slightly turned in the closing direction, the valve body 6 comes into contact with the valve seat 5 and is closed, thereby cutting off the flow of gas. In other words, even if it is not fully closed, just turning it slightly in the closing direction will cut off the gas flow. In other words, gas only flows when it is fully open. On the other hand, when the appliance is in an unloaded state, such as when a gas hose is not connected, when the operating knob 1 is turned to fully open, the valve body 6 separates from the valve seat 5 and gas flows, but there is no In a loaded state, a large amount of gas flows, and the valve ball 28 of the safety shutoff valve 4 is pushed by the gas pressure and comes into contact with the valve seat 27, so that the valve hole 25 is closed and gas does not flow.
In other words, the valve body 6 opens only when the closure 2 is fully open, and even if the closure mechanism of the closure 2 is used, it will not be throttled and gas will not flow, and when there is no load, gas will always overflow and the safety shutoff valve 4 will be closed. is activated. Furthermore, when the operating knob 1 is turned in the closing direction with the safety shutoff valve 4 in operation, the valve body 6 comes into contact with the valve seat 5, and the valve body 6 is brought into contact with the valve seat 5.
The valve ball 28 is pushed, the valve ball 28 separates from the valve seat 27, and the safety shutoff valve 4 returns to its original state.

[Effect of the invention] The present invention is constructed as described above, so that when the operating knob is turned to the fully open state, the valve element separates from the valve hole and gas flows, and the gas flow is stopped by the closure. Gas does not flow when it is throttled (between fully closed and fully open), and if you open the closer when there is no load, such as when the gas hose is not connected to the appliance, gas will always overflow and be safe. It is extremely safe as the shutoff valve operates reliably and gas is shut off reliably, and it is also placed between the closure and the valve body, separating the valve body from the valve seat only when the closure is fully open. The valve body drive mechanism is composed of an interlock that rotates together with the closing element, an actuator that is activated by the rotation of the interlock, an outer cylinder that guides the movement of the valve element, and a combination of the outer cylinder and the actuator. An actuator biasing spring is interposed between the actuator and urges the actuator toward the interlock element, and a valve element bias is interposed between the valve body and the interlock and biases the valve body toward the valve seat. Since it is composed of a spring,
The valve body opens only when fully opened by simply incorporating a valve body drive mechanism consisting of an interlock, an actuator, an outer cylinder, an actuator biasing spring, and a valve body bias spring between the closure and the valve body in the gas flow path. The structure of the parts other than the valve body drive mechanism is not complicated, and the structure of the entire gas tank is not complicated. Moreover, the valve body drive mechanism is incorporated into the gas flow path between the valve body and the closure. The valve body lifting protrusion of the actuator and the lifted protrusion of the interlocking element are locked only when the operating knob is rotated to fully open the closing element. When the valve body is released from the valve seat and the closure is slightly rotated from the fully open state in the closing direction, the valve body lifting protrusion and the lifted protrusion are disengaged, and the valve body is lifted by the spring force of the valve body biasing spring. The valve can close the valve seat and prevent the valve from opening again unless the closure is returned to the fully closed state. It is a safe valve that does not open and does not cause gas leaks even when the gas is overflowing. Furthermore, the safety shutoff valve, which closes with gas pressure when gas overflows, is constructed with a rolling valve ball, so the gas leakage is prevented. When the flow rate exceeds a specified level, the valve ball rolls and closes the valve seat, and even if the gas pipe is disconnected or ruptured anywhere on the gas outlet side from the gas tank, the valve ball will roll and close the valve seat. The safety shutoff valve can shut off the flow of gas in the event of gas overflow, and the valve ball is placed on the opposite side of the valve seat from the valve body so that the valve ball closes the valve in the event of overflow. Since the valve ball is made to move away from the valve seat when the valve body closes the valve seat in The safety shutoff valve is reset when the safety shutoff valve is separated from the valve seat, and the safety shutoff valve is automatically reset and reset with a simple structure.

[Brief explanation of the drawing]

Figure 1 is a perspective view of one embodiment of the present invention, Figure 2 is a sectional view of the same, Figure 3 is an exploded perspective view of the same, and Figure 4 is an exploded perspective view of the same.
The figure is a partially cutaway perspective view of the third casing, Figure 5a,
b, c, d are the front view and left side view of the same actuator,
Right side view and sectional view; Figures 6a, b, c, and d are front views, top views, left side views, and right side views of the outer cylinder as above; Figures 7a, b, and c are the valve body as above. 8a, b, c, and d are plan views showing the operation of the valve body drive mechanism, and FIGS. 9a, 9b are
b, c, and d are cross-sectional views of FIG. 6 is the valve body, 6d
is a cylindrical part, 6e is a lifted projection, 7 is an interlocking element, 7
b is a driving protrusion, 8 is an actuator, 8a is a fitting recess, 8
b is a flat surface, 8c is a small locking projection, 8f is a valve body lifting projection, 9 is an outer cylinder, 10 is an actuator biasing spring, 11
28 is a valve ball, and B is a valve drive mechanism.

Claims (1)

[Scope of utility model registration request] In a gas tank where a closure is rotated by rotating an operating knob to open and close gas flow, the closure is arranged in the gas flow path so that the gas flow direction and the axial direction of the closure are parallel to each other, A valve seat is formed in the gas flow passage so as to face the end face of the closure, a valve element capable of opening and closing the valve seat is arranged on the closure side of the valve seat, and the valve element is arranged between the closure and the valve element. The valve body drive mechanism that separates the valve body from the valve seat only when the closure is fully opened is composed of an interlock that rotates together with the closure, a cylindrical actuator that is activated by the rotation of the interlock, and the valve body. an outer cylinder that guides the movement of the valve; an actuator urging spring that is interposed between the outer cylinder and the actuator to urge the actuator toward the interlock element; and an actuator biasing spring that is interposed between the valve body and the interlock element. and a valve body biasing spring that urges the valve body toward the valve seat, and a driving protrusion that protrudes toward the actuator side is provided on the actuator side surface of the interlocking element, and the actuator's interlocking element and A fitting recess into which the drive protrusion fits when the closure is in the open state and a flat surface against which the tip of the drive protrusion comes into contact when the closure is in the closed state are provided on opposing surfaces, and the closure is rotated from the closed state to the open state. A small locking protrusion is formed between the flat surface of the actuator and the fitting recess so that the tip of the drive protrusion locks when the actuator moves, allowing the interlocking element and the actuator to rotate together at a certain angle. The cylindrical part on the closing side of the valve body is arranged on the inner periphery of the actuator, and the valve body lifting protrusion protrudes from the inner periphery of the actuator and the lifted object protrudes from the outer periphery of the cylindrical part of the valve body. The positional relationship with the protrusions is such that when the actuator is pushed toward the valve body by the drive protrusion of the interlocking element, the valve body lifting protrusion is located closer to the valve seat than the lifted protrusion, and the actuator is pushed by the drive protrusion of the interlocking element. The valve body is lifted only when the protrusion to be lifted is located closer to the valve seat than the valve body lifting protrusion when it is not pushed toward the valve body, and the drive protrusion of the interlocking element fits into the fitting recess with the closure fully open. The lifting protrusion and the lifted protrusion are arranged so that their circumferential positions correspond to each other, and the valve body is separated from the valve seat only when the valve body lifting protrusion and the lifted protrusion are engaged,
A safety shutoff valve that closes with gas pressure when gas overflows is configured with a rolling valve ball, and the valve ball is arranged on the opposite side of the valve seat from the valve body, so that the valve ball closes when there is overflow. A gas tank equipped with a safety device, in which the valve ball is separated from the valve seat when the valve body closes the valve seat in a state where the valve ball is closed.