KR20010049743A - A gas cock - Google Patents

Abstract

PURPOSE: A gas cock is provided to eliminate the need of the rotational fitting of a shut-off unit with a valve casing, to compact structure by using a cylindrical shut-off unit, to keep the airtightness between the shut-off unit and the valve casing, to close a gas passage, and to reduce production costs. CONSTITUTION: A gas cock has a shut-off unit(3) having three ring type grooves(33). O-rings(34) are mounted on the grooves. A valve member is installed on a push rod(4) penetrating through the shut-off unit. If an operating rod(5) is released after the ignition of gas, a pin(7) of the operating rod is guided into a cam groove(60) by the restoring force of a spring(54) for rebounding a flange(53) of the operating rod. An O-ring(43) in the front of the push rod retracts a small diameter portion(36) of the shut-off unit to a closing position and contacts with the inner face of the small diameter portion. Thus, the supply of gas to a pilot gas outlet(15) is stopped. Unless a main burner is turned off, a valve body(21) of an electronic safety valve(2) is kept in an open state according to the excitation of an electromagnet even if the push rod doesn't push the safety valve.

Description

A gas cock

The present invention relates to a gas scotch for use in a gas appliance such as a gas stove.

Conventionally, this kind of gas scotch is known, for example, in which the chamber of the valve casing is formed in a tapered shape, and in which the tapered shape of the gas chamber is rotatably provided. (See Japanese Utility Model No. 61-37986). In addition, the processing of the valve casing and the closing opening becomes complicated, and when the closing opening is attached to the valve casing, it is necessary to rotate to ensure airtightness between the valve casing and the closing opening. In addition, when igniting the main burner using a pilot burner, it is necessary to shut off the fuel gas supply to the pilot burner after the ignition operation, and for this purpose, an opening is provided on the outer circumferential surface before and after the pilot gas outlet at the inner circumferential surface of the closing opening. The O-ring was disposed through a spacer, and a bottleneck was formed in the push rod, and the supply of fuel gas to the pilot gas outlet was controlled by the position of the bottleneck, so that the push rod was complicated to process.

Further, a cylindrical closure formed by integrally forming a push rod penetrating the internal gas passage is housed in a valve casing having an inner surface corresponding thereto, and the closure is rotated in the accommodation chamber and perturbable in the front-rear direction. Gascoque is known (see Japanese Patent No. 9-170669). This eliminates the need for a backing operation and eliminates the need for complex pressing rods.

However, when closing or valve casing processing, if the outer circumference of the closure or the inner circumference of the valve casing does not become a perfect circle or does not go straight, the gas passageway of the closure is always open. Is left open, there is a risk of fuel gas leaking out of the valve casing through the valve opening of the closure or through the gap between the closure outer peripheral surface and the valve casing inner peripheral surface. For this reason, it is necessary to process a closing opening and a valve casing at high density, and to ensure airtightness, but rather a high production cost. In addition, when fuel gas flowing out from the valve port of the closing port leaks out of the valve casing along the outer circumference of the closing port when the closing port is rotated and moved in the axial direction, in particular, the main burner is ignited using a pilot burner. Since gas fires of the type described above control the fire power by closing the closing port or moving in the axial direction after the end of the ignition operation, fuel gas may leak out of the valve casing through the pilot gas outlet.

In addition, since the electronic safety valve is configured to open the electronic safety valve when the operating rod is pushed as far as possible, the electronic safety valve opens when the user, such as a gas appliance, accidentally presses the operating rod. Therefore, there is a risk that fuel gas leaks out of the fuel gas valve casing.

The problem of the present invention is that when the cylindrical closure is used in order to avoid the need for the above-described alignment operation and to simplify the structure of the gas cock itself, the outer peripheral surface of the closure and the valve casing It is possible to secure the airtightness between the closing port and the valve casing without highly precise machining of the inner circumferential surface, and to further reduce the cost by simplifying the structure of the push rod and the like. In the case where the electronic safety valve malfunctions to open the valve or when the closing power is adjusted after the ignition operation is finished, the gas stalk can be prevented from leaking to the outside of the valve casing. .

Furthermore, the gas safety device provides a gas scoop that does not open when the user of the gas appliance accidentally presses the operating rod.

Fig. 1A is a cross-sectional view showing the gas cock 1 of the present invention in the extinguishing position,

1B is a cross-sectional view taken along the line A-A of FIG. 1A;

1C is a cross-sectional view taken along the line B-B in FIG. 1A,

Fig. 2 shows the gas stalk 1 of the present invention showing a state in which the operation rod is pressed.

Flaming section,

3 shows the present invention showing a state in which the operation rod is pressed and rotated to the open side.

Cross-sectional view showing the gas cock 1,

4 is a cross-sectional view showing the gas scope 1 of the present invention after ignition;

5A is a cross-sectional view taken along the line C-C in FIG. 1, and FIG. 5B is a cross-sectional view of the cam member.

Description of the main parts of the drawing

1 gascoque

10 valve casing

2 Electronic safety valve

20 magnet case

3 closures

4 push rod

5 operation rod

6 Cam member

In order to solve this problem, the present invention accommodates a freely rotatable closure port and an electromagnetic safety valve in a valve casing, and the closure port is formed in a cylindrical shape having a gas passage therein, and the gas cylinder is formed on an outer circumferential surface thereof. A gas stalk having a valve port communicating with a furnace, wherein when the operation rod provided at the end of the valve casing is pressed and rotated to ignite, the closing port is rotated to the open side, and the valve rod is connected to the operation rod and the inside of the valve casing is opened. In this configuration, the electronic safety valve is pushed open by advancing the push rod that can move freely in the axial direction. An O-ring close to the inner peripheral surface of the valve casing in the longitudinal direction of the valve casing is provided on the outer peripheral surface of the cylindrical closing port. And the push rod has a valve member which, in the fire position, the valve member cooperates with the closure When the gas passage of the closing port is sealed and the push rod is advanced, the valve member is characterized in that the gas passage is opened. As a result, the O-rings provided before and after the valve port of the closing port are in close contact with the valve casing inner circumferential surface, so that the airtightness between the closing port and the valve casing is secured and the cost is reduced without machining the outer circumferential surface of the closing port and the inner circumferential surface of the valve casing with high density. For example, in the fire-extinguishing position, even when the electronic safety valve is malfunctioned and opened, the airtightness between the valve member provided on the push rod and the valve casing is ensured, and the valve member provided on the push rod is provided. Cooperates with the closure to close the gas passageway of the closure, so that fuel gas does not leak outside the valve casing.

Gas type of ignition main burner using a pilot burner has a valve casing, the main gas outlet for the main burner and the pilot gas outlet for the pilot burner, which communicate with the receiving chamber of the closing port. The inner peripheral surface of the closing opening is formed into an end shape (stepped type) connected from the large diameter part (long part) to the small diameter part (small part) on the solenoid safety valve side. The end is located between the main gas outlet and the pilot gas outlet, and at least one O-ring is provided on the outer circumferential surface of the push rod that moves in the gas passage of the closure, and when the O-ring is ignited, it is located in the large diameter region. The inner circumferential surface of the closure is not in contact, but when the ignition operation is completed and the push rod is retracted, the small diameter portion is disposed to close. As a result, the structure of the push rod can be simplified, and the number of parts can be reduced, and the cost can be reduced. In addition, when the ignition operation is completed and only the pilot burner is extinguished, it can be moved accordingly. Since the O-ring of the push rod closes the gas passage just in front of the pilot valve port, the supply of fuel gas to the pilot gas outlet is stopped, so that fuel gas does not leak outside the valve casing during thermal adjustment.

Furthermore, the present invention is provided with a guide means for partitioning the cam groove at the rear end of the valve casing, the operation member penetrating the inside of the guide means is protruding a pin member that can move in the cam groove, pressing the operation rod, Before the electronic safety valve is opened, the pin member is brought into contact with the cam groove of the guiding means to stop the advancement of the operating rod. However, when the operating rod is rotated from this position, the pin member moves further in the cam groove and is pressed simultaneously. The cam groove is configured such that the rod opens the electronic safety valve. As a result, even if the operating rod is incorrectly pressed, the electronic safety valve does not open.

Embodiment of the invention

1 is a cross-sectional view showing the gas scoping 1 of the present invention in the extinguishing position. This gas scope 1 has two storage chambers 11 and 12. For example, a valve casing 10 made of aluminum die casting is provided. The electronic safety valve 2 is accommodated in one storage chamber 11, and the cylindrical brass closing opening 3 is accommodated in the other storage chamber 12 by cold forging. These storage chambers are partitioned by the valve member 13 for the electromagnetic safety valve 2. Moreover, the main gas outlet 14 for a main burner and the pilot gas outlet 15 for a pilot burner are mutually provided in the accommodating chamber 12 in which the closing opening 3 was accommodated.

The electromagnetic safety valve 2 is provided with a magnet case 20. The magnet case 20 has a flame detecting element such as a thermocouple disposed in the vicinity of the flame port of the gas burner when the burner is ignited. The electromagnet excited and the adsorption piece adsorb | sucked by it based on the signal from this are accommodated, and it is comprised so that the valve opening 22 formed in the valve seat 13 by the valve body 21 connected to the adsorption piece may be opened and closed. The spring 23 serves to hold the electromagnetic safety valve in a valve closed state in a fire extinguishing position.

The closure 3 is formed in a cylindrical shape having a gas passage therein, and is freely rotatable in the storage chamber 12 of the valve casing 10 which is similarly formed in a cylindrical shape. As shown in FIGS. 1B and 1C, on the outer circumferential surface of the closure port 3, the main valve port 31 corresponds to the positions of the main gas outlet 14 and the pilot gas outlet 15 provided in the valve casing 10. And a pilot valve mechanism 32 are formed. In addition, three annular grooves 33 are formed on the outer circumferential surface of the closing opening so as to sandwich the valve openings 31 and 32 in the longitudinal direction of the closing opening. 34) are mounted respectively. Moreover, the inner peripheral surface of the closing opening 3 is formed in the shape of the end part connected from the large diameter part 35 of the electromagnetic safety valve 2 side to the small diameter part 36, and the edge part 37 is connected with the main gas outlet 14, and is shown. It is located almost at the center between the pilot gas outlets 15. The inner diameter of the large diameter part is larger than the outer diameter of the O-ring 43 of the push rod, and the outer diameter of the O-ring 44 of the push rod is in contact with the inner circumferential surface of the small diameter part. It is set to a size that does not interfere with movement in the axial direction.

The push rod 4 which penetrates the inside of the closing opening 3 is moved by the operation rod 5 mentioned later, and serves to open the valve opening 22 of the electromagnetic safety valve 2. The pressing member 4 is provided with a valve member. The valve member is composed of a jaw portion 41 formed on the push rod 4 and an O-ring 42 attached to the outer circumferential surface of the jaw portion. In the extinguishing position, the O-ring 42 is a front end face of the closing opening 3. It is formed to settle in the front. In addition, two annular grooves 45 are formed on the outer circumferential surface of the push rod 4, and O-rings 43 and 44 are attached to the annular grooves, respectively. One O-ring 43 is disposed at a position capable of moving between the large-diameter portion 35 and the small-diameter portion 36 of the closure 3 when the push rod 4 is moved in the axial direction, and the other Even if the push rod is moved, the O-ring 44 is always located downstream of the pilot valve port 15 and is arranged to contact the inner circumferential surface of the small diameter portion 36 of the closing port 3.

The operation rod 5 is connected to the push rod 4 and protrudes from the side opposite to the electromagnetic safety valve 2 of the valve casing 10. The operating rod 5 is rotated on the lid portion 50 attached to the end portion of the valve casing 10 and the U-shaped bracket 51 mounted on the lid portion and moved in the front-rear direction. It is inserted and supported freely. Moreover, the lever 52 for driving the piezoelectric ignition unit (not shown) provided in the cover part 50 is provided in the operation rod 5, This lever 52 and a U-shaped bracket 51 are provided. A spring 54 is provided between the flanges 52 of the operating rod provided on the inner side. This spring 54 serves to force the operation rod 5 in the bracket direction. Near the one end of the operating rod 5, the pin member 7 which guides in the cam groove of the guide means mentioned later protrudes perpendicularly to the longitudinal axis. This operating rod 5 can also be formed integrally with the push rod 4.

Moreover, inside the cover part 50, the guide means 6 is provided in the rear end part of the valve casing 10. As shown in FIG. This guiding means 6 is composed of a cam member which is formed integrally by, for example, injection molding resin, and which is rotatably attached to the rear end of the valve casing. The cam member 6 is formed in a hollow shape so that the operation rod can penetrate the inside thereof, and the cam groove 60 corresponds to the pin member 7 of the operation rod 5 which protrudes perpendicularly to the axial length direction. ) Is formed. As shown in Figs. 5A and 5B, the cam groove 60 is composed of a longitudinal groove 61 in the axial length direction and a transverse groove 62 bent in the circumferential direction in its cross section. Meanwhile, the lateral groove 62 of the cam groove 60 may be formed between the cam member 6 and the protrusion formed on the valve casing 10. The length of the longitudinal groove 61, when the operating rod 5 is pressed in the fire position, the pin member 7 is in contact with the start end surface of the transverse groove 62 connected from the longitudinal groove 61, the pressing rod Is set to stop the advancement of the operating rod just before the electronic safety valve is opened. When the operation rod 5 is rotated at this pushed position, the inclined and curved lateral groove 62 can penetrate into the lateral groove 62 of the cam member. Therefore, the operation rod 5 ) To advance further. As a result, the push rod 4 is advanced to open the electromagnetic safety valve. In addition, when the pin member 7 abuts on the end face of the lateral groove 62, the cam member can be rotated. However, two protrusions 63 are formed on the outer circumference of the cam member 6, and the protrusion is formed. By contacting the stop 16 formed in the valve casing 10, the rotation range of the cam member 6, that is, the operating rod 5 can be limited.

Next, the operation of the gas scotch of the present invention will be described with reference to the drawings.

When the operating rod 5 is pressed in the fire extinguishing position shown in FIG. 1, the pressing rod 4 connected to the operating rod 5 and movable at the same time in the front and rear direction in the closing opening 3 is formed of the spring 8. When the pin member 7 of the operation rod 5 abuts against the start end of the lateral groove 62, it is brought to the state shown in FIG. In this state, the O-ring 42 provided on the jaw portion 41 of the push rod is released from the end of the closing opening 3, and the front side of the two O-rings attached to the push rod 4 is provided. The O-ring 43 is moved to the large diameter portion 35 of the closing port, but the valve body 21 of the electromagnetic safety valve 2 is not open yet.

When the operating rod is rotated from this pressing position, the pin member 7 moves the inclined and curved lateral groove 62 of the cam member 6, so that the operating rod 5 and the pressing rod 4 are further advanced. It will be in the state shown in FIG. In this state, the push rod 4 opens the valve body 21 of the electromagnetic safety valve 2, whereby fuel gas flows into the gas passage inside the closing port 3, and at the same time, the operation rod 5 The closing opening 3 can be rotated by the rotation of), and each valve opening 31, 32 of the closing opening communicates with the main gas outlet 14 and the pilot gas outlet 15. As a result, fuel gas is supplied to the pilot burner and the main burner, whereby the piezoelectric unit is driven by the lever 52 to ignite the pilot burner.

After ignition, when the hand is released from the operation rod 5, the spring 7 of the spring 54 that releases the flange 53 of the operation rod causes the pin 7 of the operation rod to be guided to the cam groove 60 and the longitudinal groove. It retreats to and will be in the state shown in FIG. In this state, the O-ring 43 on the front side of the push rod can be retracted to a position in which the small diameter portion 36 of the closure port 3 is closed and in contact with the inner circumferential surface of the small diameter portion 36, so that the pilot gas outlet The supply of fuel gas to (15) is stopped. In this position, the push rod 4 has not already pushed the solenoid valve 2, but unless the main burner is turned off, the electromagnet of the solenoid valve 2 is excited and kept open.

As can be seen from the above description, the present invention provides a gas shoe which includes a freely rotatable closure port and an electronic safety valve in the valve casing, thereby eliminating the need for a rotary operation of the closure port and the valve casing. At the same time, a cylindrical closure is used to simplify the structure of the gas cylinder itself, and it is possible to secure the airtightness between the closure and the valve casing without high precision machining, and to seal the gas passage. Cost reduction can also be achieved.

Claims (3)

In the valve casing, a freely rotatable closing port and an electromagnetic safety valve are accommodated, and the closing port is formed in a cylindrical shape having a gas passage therein, and a valve opening communicating with the gas passage on the outer circumferential surface thereof. As a gas-coil, when the operation rod installed at the end of the valve casing is rotated and ignited, the push rod which is connected to the operation rod and is freely moved in the valve casing freely in the axial direction is rotated to the opening side. In this configuration, the electronic safety valve is pressed to open. On the outer peripheral surface of the cylindrical closure port, an O-ring contacting the valve casing inner peripheral surface before and after the valve port in the longitudinal direction of the valve casing is mounted, And the pressure rod has a valve member, the valve member cooperates with the closure to close the gas passage of the closure at the extinguishing position, and the valve member opens the gas passage when the pressure rod is advanced. 2. The main casing for the main burner and the pilot gas outlet for the pilot burner communicating with the valve casing in correspondence with the position of the valve port of the closing port, and the inner circumferential surface of the closing port is an electronic safety valve. At least one O-ring is formed on the outer circumferential surface of the push rod, which is formed in an end shape extending from the large diameter portion on the side to the small diameter portion, and the end portion is located between the main gas outlet and the pilot gas outlet. And the O-ring is located in the area of the large diameter portion during the ignition operation and does not contact the inner circumferential surface of the closure, but is disposed to close the small diameter portion when the pressing rod is retracted after the ignition operation is completed. The rear end of the valve casing is provided with a guide means for partitioning a cam groove, and a pin member movable in the cam groove is protruded from an operation rod passing through the guide means. When the rod is pressed, the pin member is brought into contact with the cam groove of the guiding means before the push rod opens the electronic safety valve, and the advancement of the operating rod is stopped. However, when the operating rod is rotated from this position, the pin member further moves inside the cam groove. And the cam groove is configured such that the push rod opens the electronic safety valve while being moved.