JP3328899B2 - Rotary gas valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary gas valve device used for gas appliances such as a gas table.

[0002]

BACKGROUND OF THE INVENTION Conventionally, for example, Japanese Utility Model Publication No. 61-37986
As seen in the publication, a rotatable closing member made of brass material is provided in a valve casing made of aluminum die-casting,
A rotary type that houses an electromagnetic safety valve and rotates the closure to the open side during ignition operation, and presses and opens the electromagnetic safety valve via an axially movable operating rod provided in the valve casing. Gas valve devices are known.

[0003] In this device, a closing accommodating chamber in a valve casing is formed in a tapered shape, and a tapered closing member is rotatably housed therein, and an operation is performed such that the closing member penetrates in the axial direction. A rod is provided.

[0004]

In the above conventional example, since the tapered closing member is used, the inner peripheral surface of the closing chamber and the outer peripheral surface of the closing member are rubbed with each other to improve the airtightness between the two. Need to secure. This rubbing must be performed while deciding the set of the valve casing and the closet and checking the contact condition between the two. A lot of man-hours are required for the rubbing work, and the rubbing with the other closet is required. Yield is poor due to incompatibility.

In addition, an operating rod is provided separately from the closing rod, but in this case, an O-ring for preventing gas leakage from the rod through hole of the closing element is also required, and the number of parts increases. The cost is high in combination with the above-mentioned rubbing.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to eliminate the need for sliding and reduce the number of components, thereby reducing the cost of a rotary gas valve device.

[0007]

Means for Solving the Problems In order to solve the above problems,
The present invention relates to an operation rod that accommodates a rotatable closure and an electromagnetic safety valve in a valve casing, rotates the closure to an open side during ignition operation, and is movable in an axial direction provided in the valve casing. In a rotary gas valve device that opens and closes the electromagnetic safety valve through a valve, the outer peripheral surface of the closing member is formed in a cylindrical shape, and the closing member is slidable in the axial direction with respect to the valve casing. At the time of ignition operation, the operation rod is fixed to the closing element, and at the time of the ignition operation, the closing element is rotated to the open side and advanced in the axial direction to push the electromagnetic safety valve to open, and at the end of the ignition operation, the closing element is retracted in the axial direction. To release the pressing of the electromagnetic safety valve.

When the outer peripheral surface of the closet is formed in a cylindrical shape as described above, rubbing with the valve casing becomes unnecessary, and the gas valve can be assembled with a small number of steps. Further, the axial movement of the closing element, which is impossible with the tapered closing element, becomes possible. The operation rod is fixed to the closing element, and the electromagnetic safety valve can be pressed and opened by the axial movement of the closing element. Therefore, unlike the conventional example, it is not necessary to slidably penetrate the operation rod through the closing member, and the O-ring for sealing the rod through hole is not required. Further, the operation rod can be integrally formed with the closing member. Thus, the number of parts can be reduced. Thus, according to the present invention,
By reducing the number of assembly steps and the number of parts, the cost of the rotary gas valve device can be reduced.

When the main burner is ignited by a pilot burner, it is necessary to extinguish the pilot burner at the end of the ignition operation. In this case, the main gas outlet for the main burner and the pilot gas outlet for the pilot burner communicating with the storage chamber of the closer are formed in the valve casing so as to be separated from each other in the axial direction. If the main valve hole that can communicate with the main gas outlet in any of the retracted position and the pilot valve hole that can communicate with the pilot gas outlet only in the forward position of the closing member is formed, the valve can be closed by the ignition operation. When moved to the forward position and turned to the open side, the main valve hole communicates with the main gas outlet and the pilot valve hole communicates with the pilot gas valve port, and the pilot burner is transferred from the pilot burner to the main burner and ignited, When the closing element moves to the retracted position at the end of the ignition operation, only the communication between the pilot gas outlet and the pilot valve hole is cut off, and the pilot burner is extinguished. According to this, there is no need to separately provide a valve for the pilot burner, and the structure can be simplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 (a), reference numeral 1 denotes a valve casing made of aluminum die-cast which is long in the front-rear direction. An electromagnetic safety valve 2 is provided at a front portion of the casing 1 and a cold forging is provided at a rear portion. And a closing member 3 made of brass material formed by the above method. Electromagnetic safety valve 2 formed in valve casing 1
The storage chamber 10 and the storage chamber 11 for the closure 3 are partitioned via a valve seat 12 for the electromagnetic safety valve 2 formed in the valve casing 1. A gas inlet 13 communicating with the storage chamber 10 is opened in the peripheral wall of the valve casing 1, and a main gas outlet 14 for the main burner and a pilot gas outlet 1 for the pilot burner communicating with the storage chamber 11.
5 is opened in the axial direction, that is, in the front-back direction by a distance L1.

The electromagnetic safety valve 2 has a magnet case 20, in which an electromagnet that is excited when a burner is ignited by a flame detecting element such as a thermocouple and a suction piece adsorbed by the magnet are housed. The valve 21 formed in the valve seat 12 is opened and closed by a valve body 21 connected thereto, and is normally biased and held in a closed state by a spring 23.

An outer peripheral surface 30 of the closing member 3 is formed in a cylindrical shape, and an inner peripheral surface of the closing accommodating chamber 11 is also formed in a cylindrical shape. It is slidable back and forth. Airtightness between the outer peripheral surface 30 of the closet 3 and the inner peripheral surface of the closet storage chamber 11 is ensured by grease. In addition, a cavity 31 that opens toward the front is formed in the closing member 3, and an operation rod 32 that is formed integrally with the closing member 3 and that extends forward in the cavity 31 is provided. The closing element 3 is urged rearward by a spring 33 contracted between the closing element 3 and the valve seat 12.

A main valve hole 34 and a pilot valve hole 35 communicating with the cavity 31 as shown in FIGS. 1 (b) and 1 (c) are formed on the outer peripheral surface 30 of the closing member 3 in the front-rear direction as shown in FIG. At a distance L2. The distance L2 is set longer than the distance L1 by the distance L3, and is shown in FIG.
In the retracted position of the closing member 3 shown in FIG. 5, the position of the main valve hole 34 coincides with the position of the main gas outlet 14 in the front-rear direction (see FIG. 7). Just shift. In addition, each valve hole 3
As shown in FIG. 2, the pilot valve holes 35 have a constant width, while the main valve hole 34 has a wide portion 34a and a narrow portion 34b. The narrow portion 34b facilitates adjustment of the heating power on the low-fire side.

An operating shaft 4 projecting rearward of the valve casing 1 is fitted to the rear end of the closing member 3 so as to be relatively non-rotatable. The operating shaft 4 is provided with a cover plate 16 at the rear end of the valve casing 1.
And a gate-shaped bracket 17 attached thereto, and are supported so as to be rotatable and movable in the front-rear direction. Operation axis 4
A lever 40 provided on the cover plate 16 for driving a piezoelectric ignition unit (not shown);
A stopper plate 42, which is urged rearward by 1 and is slidably engaged with the operation shaft 4 while being prevented from rotating, is attached. As shown in FIG. 3, a notch 42a is formed in the peripheral edge of the stopper plate 42. When the operation shaft 4 is turned to the fire extinguishing position, the notch 42a engages with the projection 17a provided on the portal bracket 17 in the notch 42a. At the same time, the operation shaft 4 is locked at the fire extinguishing position. At the time of the ignition operation, the operating shaft 4 is pushed forward, and the stepped portion 43 of the operating shaft 4 stops the stopper plate 42.
Is pushed to disengage from the projection 17a, and in this state, the operation shaft 4 is rotated to the ignition position (see FIG. 6A).

A cylindrical cam member 5 is rotatably housed at the rear end of the valve casing 1. As shown in FIG. 5, a substantially L-shaped cam groove 50 having a longitudinal groove 50a in the front-rear direction and a slanted lateral groove 50b bent in the circumferential direction at the front end thereof is formed on the inner peripheral surface of the cam member 5, as shown in FIG. The pin 44 attached to the operation shaft 4 is engaged with the cam groove 50.
A protrusion 51 is provided on the outer periphery of the cam member 5 as shown in FIG.
When the projection 51 comes into contact with the stopper portion 18 formed on the valve casing 1, the cam member 5, and therefore, the rotation range of the operating shaft 4 engaged with the cam member 5 via the pin 44 is extinguished. The position is controlled between the ignition position and the ignition position.

When the operating shaft 4 is pushed at the fire extinguishing position, the closing piece 3 is pushed to the forward position as shown in FIG. 6A, and the electromagnetic safety valve 2 is pushed and opened via the operating rod 32. In this state, the pilot gas outlet 15
And the position of the pilot valve hole 35 coincides with the position of the main gas outlet 14, and the main valve hole 34 partially overlaps with the position of the main gas outlet 14. When the operating shaft 14 is turned to the ignition position, the main valve hole 34 and the pilot valve hole 35
(B) As shown in (c), the main gas outlet 14 and the pilot gas outlet 15 communicate with each other to supply gas to the pilot burner and the main burner, and the lever 40 drives the piezoelectric ignition unit to drive the pilot burner. And the main burner is ignited via the pilot burner. When the operation shaft 4 rotates, the pin 44 moves to the lateral groove portion 50b of the cam groove 50, and the closer 3 is held at the forward position even if the pressing force applied to the operation shaft 4 is weakened.

After the ignition, when the hand is released from the operation shaft 4, the closing
The pin 44 is guided by the inclined edge of the horizontal groove 50b of the cam groove 50 by the urging force of the spring 33 acting through the vertical groove 50a.
The operation shaft 4 is retracted, and the closing member 3 returns to the retracted position as shown in FIG. In this state, the pressing of the electromagnetic safety valve 2 is released, but as long as the main burner does not misfire, the safety valve 2 is attracted and held in the open state by the electromagnetic force. Further, the pilot valve hole 35 is disengaged from the pilot gas outlet 15, and the pilot burner is extinguished. When the operating shaft 4 is turned from the ignition position to the fire-extinguishing position, the opening degree of communication between the main valve hole 34 and the main gas outlet 14 decreases, and the amount of gas supplied to the main burner decreases. Adjustments are made.

When the operating shaft 4 is returned to the fire extinguishing position, the main burner is extinguished and the notch 42a
Coincides with the projection 17a, the stopper plate 42 retreats by the urging force of the spring 41, the projection 17a engages with the notch 42a, and the operation shaft 4 is locked at the fire extinguishing position.

In the above embodiment, the airtightness between the closing member 3 and the inner peripheral surface of the casing is ensured by the grease. However, as shown in FIG. A resin or rubber seal collar 6 can be fitted and fixed to one of the inner peripheral surfaces to ensure airtightness between them, and furthermore, the closure 3 itself or the valve casing can be provided. 1 itself may be made of resin.

Further, the operating rod 32 may be fixed to the closing member 3 by screwing or the like as a separate body from the closing member 3, but if the operating rod 32 is integrally formed with the closing member 3 as described above, This is advantageous because the number of parts can be further reduced. When the operating rod 32 is formed separately, the material thereof may be the same as or different from that of the closing member 3.

In the above embodiment, the cam member 5 is provided, and after the operating shaft 4 is pushed in at the fire extinguishing position, the pushing force required for turning to the ignition position can be reduced. It is also possible to omit the cam member 5 and perform the ignition operation by pushing and turning the operation shaft 4.

[Brief description of the drawings]

1A is a longitudinal sectional view showing a state when a valve is closed according to a first embodiment of the present invention, FIG. 1B is a transverse sectional view taken along the line BB of FIG. 1A, and FIG. ) Line CC

FIG. 2 is a side view of the closure.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 shows a cam groove of a cam member.

6A is a longitudinal sectional view showing a state at the time of ignition according to the first embodiment, FIG. 6B is a transverse sectional view taken along line BB of FIG. 6A,
(C) Cross-sectional view taken along line CC of FIG.

FIG. 7 is a longitudinal sectional view showing a state at the end of the ignition operation according to the first embodiment.

FIG. 8 is a longitudinal sectional view showing a state when a valve is closed according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Valve casing 11 Closed storage room 14 Main gas outlet 15 Pilot gas outlet 2 Electromagnetic safety valve 3 Closer 30 Outer peripheral surface 32 Operation rod 34 Main valve hole 35 Pilot valve hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 5/00-5/22 F16K 31/44 F16K 31/524 F16K 31/06 385 F16K 31/06 380 F23Q 9/14

Claims (3)

(57) [Claims] 1. An operation in which a rotatable closing member and an electromagnetic safety valve are housed in a valve casing, and the closing member is turned to an open side during an ignition operation and is movable in an axial direction provided in the valve casing. In a rotary gas valve device in which an electromagnetic safety valve is pressed and opened via a rod, an outer peripheral surface of a closing member is formed in a cylindrical shape, and the closing member is slidable in an axial direction with respect to a valve casing. At the time of ignition operation, the operation rod is fixed to the closing element, and at the time of the ignition operation, the closing element is rotated to the open side and advanced in the axial direction to push and open the electromagnetic safety valve, and at the end of the ignition operation, the closing element is retracted in the axial direction. And releasing the pressure of the electromagnetic safety valve. 2. The rotary gas valve device according to claim 1, wherein the operating rod is formed integrally with the closing member. 3. A valve casing having a main gas outlet for a main burner and a pilot gas outlet for a pilot burner, which are communicated with a storage chamber for the closure, are formed in the valve casing so as to be spaced apart from each other in the axial direction. A main valve hole capable of communicating with the main gas outlet at any of the forward position and the retreat position, and a pilot valve hole capable of communicating with the pilot gas outlet only at the closed forward position. 3. The rotary gas valve device according to 1 or 2.