JP2012002294A - Gas valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive gas valve device including a gas cock, a flow passage block having a flange jointed to a flange of a cock body, a solenoid valve for opening and blocking a gas flow passage within the flow passage block and an orifice member interposed in a side passage in parallel with the solenoid valve and eliminating the necessity of drilling processing for forming a side passage.SOLUTION: First and second gas outflow ports 23, 24 are opened in the flange 21 of the cock body 2, and a first plug hole 41 making gas flow in the first gas outflow port 23 and a second plug hole 42 making gas flow in the second gas outflow port 24 are formed in a plug 4. A first connection port 52a serving as a portion of a gas flow passage on the solenoid valve upstream side and a second connection port 52d making the second gas outflow port 24 communicate with a portion of a gas flow passage on the solenoid valve downstream side are opened on the flange 51 of the flow passage block 5. The orifice member 7 is fitted to the second gas outflow port 24 or the second connection port 52d.

Description

  The present invention relates to a gas valve device used in a gas appliance such as a gas stove.

  Conventionally, as this type of gas valve device, a gas cock that houses a rotatable closing member in the cock body, and a flow path block having a flange portion that joins a flange portion that opens a gas outlet on the outer surface of the cock body, And a solenoid valve that opens and shuts off a gas flow channel in a flow channel block that communicates with a gas outlet, and an orifice member that has an orifice hole provided in a side passage in parallel with the electromagnetic valve (see FIG. For example, see Patent Documents 1 and 2). In this case, the electromagnetic valve is closed when the temperature of the heated object heated by the burner of the gas appliance exceeds a predetermined set temperature. When the solenoid valve is closed, gas flows only in the side passage, the amount of gas supplied to the burner is limited to a predetermined small flow rate set by the orifice hole, and the temperature of the object to be heated is lowered.

  By the way, conventionally, a first hole that reaches the valve hole of the solenoid valve from the outer surface thereof and a second hole that reaches the first hole from the valve chamber of the solenoid valve are formed in the flow path block. A side path is constituted by the first hole and the second hole, and an orifice member is mounted in the first hole. And in the thing of patent document 1, the 2nd hole for a side passage is formed in the valve seat which faces the valve chamber of a solenoid valve in parallel with a valve hole. In this case, the second hole can be formed by punching in the same manner as the valve chamber and the valve hole when the flow path block is die-cast. However, in this case, it is necessary to ensure a relatively wide space between the two holes in order to ensure the hot water supply to the valve seat portion between the valve hole and the second hole during die casting. become. As a result, the diameter of the valve chamber must be increased, and the flow path block is increased in size.

  On the other hand, in the thing of patent document 2, the 2nd hole is diagonally formed in the outer edge part of the valve seat, According to this, it is not necessary to enlarge a valve chamber. However, in this case, the second hole cannot be formed by die-cutting at the time of die-casting the flow path block, and drilling of the second hole after die-casting is necessary. Therefore, there is a problem that the number of processing steps increases and the cost increases.

Japanese Patent Laid-Open No. 7-119846 (FIG. 8) Japanese Patent Laid-Open No. 10-300077 (FIG. 3)

  In view of the above points, the present invention provides a low-cost gas valve device that does not require an increase in the size of a flow path block and that does not require drilling to form a side path. It is said.

  In order to solve the above-described problems, the present invention provides a gas cock that houses a rotatable closing member in a cock body made of a die-cast product, and a flange that is joined to a flange portion in which a gas outlet on the outer surface of the cock body is opened. A flow path block made of a die-cast product having a portion, a solenoid valve for opening and closing the gas flow path in the flow path block communicating with the gas outlet, and an orifice hole provided in a side path in parallel with the solenoid valve In a gas valve device including an orifice member, first and second gas outlets are opened in a flange portion of a cock body, and the first gas flow is closed in a predetermined rotation range of the closing member. A first closing hole for flowing gas to the outlet and a second closing hole for flowing gas to the second gas outlet are formed, and the flange portion of the flow path block communicates with the first gas outlet. The first gas channel part on the upstream side A connection port, a second connection port that communicates the second gas outlet and the portion of the gas flow path on the downstream side of the solenoid valve are established, and a side path is configured by the second outlet and the second connection port. In addition, an orifice member is attached to the second outlet or the second connection port.

  According to the present invention, a side path is formed by the second outlet and the second connection port separated and independent from the valve chamber of the solenoid valve, and the diameter of the valve chamber is not increased for forming the side path. It will end. Further, the flange portion of the cock body and the flange portion of the flow channel block are originally formed to be large in order to ensure the strength of attachment of the flow channel block to the cock main body. Therefore, even if these flange portions are not particularly enlarged, the first outflow port and the second outflow port can be formed without difficulty in the flange portion during die casting of the cock body, and the first connection port and the second connection port The connection port can also be formed without difficulty in the flange portion when die-casting the flow path block. Therefore, according to the present invention, an increase in the size of the flow path block can be avoided, and it is not necessary to perform drilling processing for the side path after die casting, thereby reducing the number of steps and reducing costs. .

  By the way, it is necessary to provide packing between the flange portion of the cock body and the flange portion of the flow path block in order to prevent gas leakage from the communication portion between the first outlet and the first connection port. . In this case, if the seal is integrally formed on the packing so as to contact the end surface of the orifice member, a seal member dedicated to the orifice member becomes unnecessary, the number of parts can be reduced, and the cost can be further reduced. it can. In the above conventional example, a packing is interposed between the flange portion of the cock body and the flange portion of the flow path block, and the orifice member is attached to the outer peripheral surface of the orifice member attached to the first hole. The O-ring which is the seal member is attached, and the number of parts increases, resulting in an increase in cost.

  Further, in the present invention, the rotation range of the closing member through which the gas flows to the second gas outlet through the second closing hole is a closed range in which the gas flows to the first gas outflow passage through the first closing hole. It is desirable that the width is set to be wider in the direction of rotation toward the closing side of the closing element than the rotation range of the closing element. According to this, even if the gas supply through the first closing hole is interrupted by the rotation of the closing element toward the closing side, the gas supply to the side passage through the second closing hole is continued. The gas flows at a predetermined small flow rate set by the orifice member. Therefore, the narrowing operation to the minimum heating power can be easily performed without causing the burner to misfire.

The perspective view of the gas valve apparatus of embodiment of this invention. The cutting | disconnection side view of the gas valve apparatus of embodiment. The perspective view of the closing element provided in the gas valve apparatus of embodiment.

  1 and 2 show a gas valve device according to an embodiment of the present invention provided in a gas appliance such as a gas stove. The gas valve device stores an electromagnetic safety valve 3 at a rear end portion of a cock body 2 made of an aluminum die-cast product that is long in the front-rear direction, and a rotatable cock 4 at an intermediate portion of the cock body 2. 1 and the flow passage block 5 made of an aluminum die-cast product having a flange portion 51 joined to the flange portion 21 formed on the outer surface of the intermediate portion of the cock main body 2 and the gas flow passage 52 in the flow passage block 5 are cut off. And an electromagnetic valve 6.

  The cock body 2 includes a gas inlet 22 communicating with the storage space of the electromagnetic safety valve 3, first and second gas outlets 23 and 24 communicating with the storage space of the closing member 4, and the electromagnetic safety valve 3. A valve hole 25 between the storage space and the storage space of the closing member 4 is formed. Both the first and second gas outlets 23 and 24 are opened in the flange portion 21 of the cock body 2. The gas inlet 22, the first gas outlet 23, the second gas outlet 24 and the valve hole 25 are formed by die cutting when the cock body 2 is die-casted.

  The electromagnetic safety valve 3 includes a valve body 32 biased by a spring 31 to a closed position that closes the valve hole 25, a magnetic piece 34 attached to the rear end of the valve shaft 33 extending backward from the valve body 32, and a magnetic piece 34. And an electromagnet 35 opposed to each other. The valve body 32 is pushed by a later-described pressing rod 29 to a position where the magnetic piece 34 comes into contact with the electromagnet 35. By energizing the electromagnet 35 in this state, the electromagnetic safety valve 3 is attracted and held in the open state.

  The closing member 4 is formed of a cylindrical body having an outer peripheral surface as a tapered surface. The peripheral wall portion of the closing member 4 is separated in the front-rear direction, and a first closing hole 41 for flowing gas to the first gas outlet 23 and a second closing hole 42 for flowing gas to the second gas outlet 24. And are formed. As shown in FIG. 3, the second closing hole 42 includes a hole 42 a that communicates with the internal space of the closing element 4, and a groove 42 b on the outer periphery of the closing member that extends in the circumferential direction from the hole 42 a. Then, the rotation range of the closing member 4 through which the gas flows to the second gas outlet 24 via the second closing hole 42 is closed, and the closing flow of the gas to the first gas outlet 23 via the first closing hole 41 is performed. The predetermined angle θ is set wider than the rotation range of the child 4 in the rotation direction of the closing member 4 toward the closing side. Therefore, even after the gas supply through the first closing hole 41 is cut off by the rotation of the closing element 4 toward the closing side, the second closing hole until the closing element 4 is rotated by a predetermined angle θ. The gas supply via 42 is continued.

  An operation shaft 27 that is inserted into the cock body 2 through a lid plate 26 attached to the front end of the cock body 2 and a connector 28 that is housed in the front end portion of the cock body 2 are provided. An operation knob (not shown) is attached to the front end portion of the operation shaft 27. At the rear end of the connector 28 is formed a non-circular hole 28a into which the rear end of the operation shaft 27 formed in a non-circular cross section is fitted, and the front-rear direction formed in the front end of the closure 4 A claw piece 28 b that engages with the split groove 43 is projected. Then, the closing member 4 is rotated via the connector 28 by the rotation of the operation shaft 27.

  A longitudinal pressing rod 29 is provided in the front-rear direction penetrating the closing member 4. The pressing rod 29 is in contact with the rear end of the operation shaft 27 by the urging force of the spring 29a. When the operating shaft 27 is pushed, the pressing rod 29 is pushed by the operating shaft 27 and moves forward to the electromagnetic safety valve 3 side. The pressing rod 29 comes into contact with the valve body 32 of the electromagnetic safety valve 3 so that the electromagnetic safety valve 3 is The valve is pressed and opened.

  Hereinafter, the flow path block 5 will be described in detail with the direction from the cock body 2 toward the flow path block 5 as the upper side. In the flow path block 5, a valve chamber 62 for accommodating the valve body 61 of the electromagnetic valve 6 is formed so as to be positioned rearward of the flange portion 51 and open to the rear, and at the front end of the valve chamber 62. A valve hole 64 extending in the front-rear direction is formed in the valve seat 63. The opening end of the valve chamber 62 that opens rearward is closed by a solenoid 65 of the electromagnetic valve 6. The electromagnetic valve 6 is closed when the temperature of the heated object heated by the burner of the gas appliance exceeds the set temperature.

  In the flange portion 51 of the flow path block 5, a first connection port 52 a that communicates with the first gas outlet 23 and becomes a portion of the gas flow path 52 on the upstream side of the electromagnetic valve 6 is opened so as to reach the valve chamber 62. Has been. Further, the flow path block 5 includes an electromagnetic valve 6 including a straight portion 52b extending straight upward from the valve hole 64 of the electromagnetic valve 6 and a bent portion 52c bent in an L shape rearward from the upper end of the straight portion 52b. A portion of the gas flow path 52 on the downstream side is formed.

  Further, in addition to the first connection port 52a, the flange portion 51 of the flow path block 5 is provided with a second connection port 52d that communicates the second gas outlet 24 and the straight portion 52b. The second gas outlet 24 and the second connection port 52d constitute a side path parallel to the solenoid valve 6. The second connection port 52d is formed by die-cutting integrally with the straight portion 52b when the flow path block 5 is die-cast. Further, the first connection port 52a, the bent portion 52c, the valve chamber 62, and the valve hole 64 are also formed by die cutting when the flow path block 5 is die-cast.

  An orifice member 7 having an orifice hole 7 a is attached to the second gas outlet 24. When the solenoid valve 6 is closed due to the temperature rise of the object to be heated, the gas flows only in the side passage so that the amount of gas supplied to the burner is limited to a predetermined small flow rate set by the orifice hole 7a. I have to.

  Further, in order to prevent gas leakage from the communication portion between the first gas outlet 23 and the first connection port 52a between the flange portion 21 of the cock body 2 and the flange portion 51 of the flow path block 5, A packing 8 is interposed. The packing 8 is integrally formed with a seal portion 8 a that contacts the end surface of the orifice member 7.

  According to the embodiment described above, a side path is formed by the second gas outlet 24 and the second connection port 52d separated and independent from the valve chamber 62 of the solenoid valve 6, and the valve is formed for the side path formation. It is not necessary to increase the diameter of the chamber 62. Further, the flange portion 21 of the cock body 2 and the flange portion 51 of the flow path block 5 are originally formed to be large in order to ensure the attachment strength of the flow path block 5 to the cock main body 2. Therefore, the first gas outlet 23 and the second gas outlet 24 can be easily formed in the flange portion 21 by die-cutting when the cock body 2 is die-casted without particularly increasing the flange portions 21 and 51. In addition, the first connection port 52a and the second connection port 52d can also be formed without difficulty in the flange portion 51 during die casting of the flow path block 5. Therefore, the enlargement of the flow path block 5 can be avoided, and it is not necessary to perform a drilling process for the side path after the die casting process, thereby reducing the number of steps and reducing the cost.

  Further, gas leakage from the mounting portion of the orifice member 7 can be prevented by the seal portion 8 a integrated with the packing 8 interposed between the flange portion 21 of the cock body 2 and the flange portion 51 of the flow path block 5. Accordingly, the seal member dedicated to the orifice member 7 is not necessary, and the number of parts can be reduced, thereby further reducing the cost.

  Furthermore, in this embodiment, even if the gas supply through the first closing hole 41 is blocked by the rotation of the closing element 4 toward the closing side, the passage to the side path through the second closing hole 42 is performed. Gas supply is continued and gas flows at a predetermined small flow rate set by the orifice hole 7a. Therefore, the narrowing operation to the minimum heating power can be easily performed without causing misfire of the burner, and the operability is improved.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, although the orifice member 7 is attached to the second gas outlet 24 in the above embodiment, the orifice member 7 may be attached to the second connection port 52d. Further, in the description of the embodiment, the direction from the cock body 2 toward the flow path block 5 is upward, but the vertical direction does not define the direction when the gas valve device is used, and the flow path block 5 is set in the horizontal direction. Also included in the present invention is a gas valve device that is used in a lateral orientation toward the side or a downward orientation in which the flow path block 5 is directed downward.

  DESCRIPTION OF SYMBOLS 1 ... Gas cock, 2 ... Cock main body, 21 ... Flange part of cock main body, 23 ... 1st gas outflow port, 24 ... 2nd gas outflow port, 4 ... Closure, 41 ... 1st closing hole, 42 ... 2nd Closure hole, 5 ... flow path block, 51 ... flange portion of flow path block, 52 ... gas flow path, 52a ... first connection port, 52d ... second connection port, 6 ... solenoid valve, 64 ... valve hole, 7 ... orifice member, 7a ... orifice hole, 8 ... packing, 8a ... sealing part.

Claims (3)

A gas cock containing a rotatable closing member in a cock body made of a die-cast product, and a flow path block made of a die-cast product having a flange portion joined to a flange portion having opened a gas outlet on the outer surface of the cock body; In the gas valve device comprising: an electromagnetic valve that opens and shuts off the gas flow path in the flow path block that communicates with the gas outlet; and an orifice member that has an orifice hole provided in a side path parallel to the electromagnetic valve.
First and second gas outlets are formed in the flange portion of the cock body, and a first closing hole for allowing gas to flow to the first gas outlet in a predetermined range of rotation of the closing member. And a second closing hole for flowing gas to the second gas outlet,
A first connection port that is a portion of a gas flow path upstream of the solenoid valve, communicates with the flange portion of the flow path block, and a gas flow downstream of the second gas flow outlet and the solenoid valve. A second connection port communicating with the portion of the road is established, and a side path is configured by the second outlet and the second connection port,
An orifice member is attached to the second outlet or the second connection port.   The seal part which contact | abuts to the end surface of the said orifice member is integrally formed in the packing interposed between the flange part of the said cock main body, and the flange part of the said flow path block. Gas valve device.   The range of rotation of the closing member through which the gas flows to the second gas outlet through the second closing hole is the closing range of the closing member through which the gas flows into the first gas outflow path through the first closing hole. 3. The gas valve device according to claim 1, wherein the gas valve device is set so as to be wider in a rotation direction toward the closing side of the closing element than in a rotation range.

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