JP7343318B2 - fire power control valve - Google Patents

fire power control valve Download PDF

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JP7343318B2
JP7343318B2 JP2019131447A JP2019131447A JP7343318B2 JP 7343318 B2 JP7343318 B2 JP 7343318B2 JP 2019131447 A JP2019131447 A JP 2019131447A JP 2019131447 A JP2019131447 A JP 2019131447A JP 7343318 B2 JP7343318 B2 JP 7343318B2
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recess
hole
control valve
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JP2020193796A (en
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聖也 加藤
秀幸 近藤
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Rinnai Corp
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Description

本発明は、ガスバーナへのガス供給路に介設される、固定ディスクと、固定ディスクに密着した状態で回転可能な回転ディスクとを備える火力調節弁に関する。 The present invention relates to a thermal power control valve that is provided in a gas supply path to a gas burner and includes a fixed disk and a rotary disk that is rotatable in close contact with the fixed disk.

従来、この種の火力調節弁として、特許文献１により、固定ディスクと回転ディスクとに互いに同一半径の配置円上に位置させて連通孔が形成され、固定ディスクと回転ディスクとの一方のディスクの連通孔は、周方向一方に向かって径方向断面積が次第に小さくなる不等断面積形状に形成され、固定ディスクと回転ディスクとの他方のディスクの連通孔に重なる不等断面積形状の連通孔の部分の位置が回転ディスクの回転により連続的に変化して、ガスバーナへのガス供給量が連続的に可変調節されるようにしたものが知られている。 Conventionally, in this type of thermal power control valve, according to Patent Document 1, a communication hole is formed in a fixed disk and a rotating disk by locating them on a circle having the same radius, The communication hole is formed in an unequal cross-sectional area shape in which the radial cross-sectional area gradually decreases toward one side in the circumferential direction, and has an unequal cross-sectional area shape that overlaps the communication hole in the other disk between the fixed disk and the rotating disk. It is known that the position of the part is continuously changed by the rotation of a rotating disk, so that the amount of gas supplied to the gas burner is continuously and variably adjusted.

ところで、一般的には、固定ディスクに回転ディスクを潤滑剤を介して密着させている。然し、上記特許文献１に記載のものにおいて、潤滑剤を用いると、不等断面積形状の連通孔の径方向断面積の小さい部分が潤滑剤により目詰まりし、ガスバーナへのガス供給量が弱火側で設定量より減少し、ガス供給量の調節精度が悪くなってしまうことがある。 By the way, generally, a rotating disk is closely attached to a fixed disk via a lubricant. However, in the device described in Patent Document 1, if a lubricant is used, the portion of the communication hole having an unequal cross-sectional area shape with a small radial cross-sectional area is clogged with the lubricant, and the amount of gas supplied to the gas burner is reduced to low heat. The gas supply amount may decrease from the set amount on the side, resulting in poor adjustment accuracy of the gas supply amount.

そこで、特許文献１に記載のものでは、固定ディスクと回転ディスクとの当接面に表面処理を施し、固定ディスクに対する回転ディスクの密着性を潤滑剤を用いずに確保できるようにしている。然し、このように表面処理を施したのでは、潤滑剤を用いる場合に比しコストがかなり高くなってしまう。 Therefore, in the device described in Patent Document 1, a surface treatment is applied to the contact surfaces of the fixed disk and the rotating disk, so that the adhesion of the rotating disk to the fixed disk can be ensured without using a lubricant. However, performing surface treatment in this manner results in considerably higher costs than when using a lubricant.

特開２０１４－８１１０８号公報Japanese Patent Application Publication No. 2014-81108

本発明は、以上の点に鑑み、固定ディスクと回転ディスクとの密着のために潤滑剤を用いるにも拘らず、ガス供給量の調節精度を確保できるようにした火力調節弁を提供することをその課題としている。 In view of the above points, it is an object of the present invention to provide a thermal power control valve that can ensure the accuracy of adjusting the amount of gas supplied even though a lubricant is used to bring the fixed disk and rotating disk into close contact. This is the issue.

上記課題を解決するために、本発明は、ガスバーナへのガス供給路に介設される、固定ディスクと、固定ディスクに潤滑剤を介して密着した状態で回転可能な回転ディスクとを備える火力調節弁であって、固定ディスクと回転ディスクとに互いに同一半径の配置円上に位置させて連通孔が形成され、固定ディスクと回転ディスクとの一方のディスクの連通孔は、周方向一方に向かって径方向断面積が次第に小さくなる不等断面積形状に形成され、固定ディスクと回転ディスクとの他方のディスクの連通孔に重なる不等断面積形状の連通孔の部分の位置が回転ディスクの回転により連続的に変化して、ガスバーナへのガス供給量が連続的に可変調節されるようにしたものにおいて、前記一方のディスクに、前記配置円上で前記不等断面積形状の連通孔から離れた部分に位置させて、前記他方のディスクに対する当接面から窪んだ第１凹部が形成されることを特徴とする。 In order to solve the above-mentioned problems, the present invention provides a thermal power adjustment system that includes a fixed disk, which is interposed in a gas supply path to a gas burner, and a rotary disk that is rotatable while being in close contact with the fixed disk via a lubricant. In the valve, a communicating hole is formed in a fixed disk and a rotating disk so as to be located on a circle having the same radius, and the communicating hole in one of the fixed disk and the rotating disk is formed toward one side in the circumferential direction. The radial cross-sectional area is formed in an unequal cross-sectional area shape that gradually becomes smaller, and the position of the portion of the communicating hole with the unequal cross-sectional area shape that overlaps the communicating hole of the other disk between the fixed disk and the rotating disk is changed by the rotation of the rotating disk. In the device in which the amount of gas supplied to the gas burner is continuously and variably adjusted, the one disk has a hole spaced apart from the communicating hole having an uneven cross-sectional area shape on the arrangement circle. A first recessed portion is formed at the portion of the disc, the first recess being recessed from the abutment surface for the other disk.

本発明において、例えば、回転ディスクに不等断面積形状の連通孔と第１凹部とを形成した場合は、火力調節弁の組立完了後に、回転ディスクを不等断面積形状の連通孔の周方向一方の端部、即ち、径方向断面積の小さい先端部から第１凹部に向かう方向に回転させる。これによれば、余分な潤滑剤が第１凹部に入って除去され、第１凹部が通過して余分な潤滑剤が除去された固定ディスクの部分を不等断面積形状の連通孔の径方向断面積の小さい先端部が通過することになる。また、固定ディスクに不等断面積形状の連通孔と第１凹部とを形成した場合は、火力調節弁の組立完了後に、回転ディスクを第１凹部から不等断面積形状の連通孔の径方向断面積の小さい先端部に向かう方向に回転させる。これによれば、第１凹部で余分な潤滑剤が除去された回転ディスクの部分が不等断面積形状の連通孔の先端部を通過することになる。そのため、不等断面積形状の連通孔の径方向断面積の小さい部分の潤滑剤による目詰まりは生じない。従って、固定ディスクと回転ディスクとの密着のために潤滑剤を用いているにも拘わらず、ガス供給量の調節精度を確保できる。 In the present invention, for example, when the rotating disk is formed with a communicating hole having a shape of unequal cross-sectional area and a first recess, after the assembly of the thermal power control valve is completed, the rotating disk is moved in the circumferential direction of the communicating hole having a shape of unequal cross-sectional area. It is rotated from one end, that is, the tip having a small radial cross-sectional area, in a direction toward the first recess. According to this, excess lubricant enters the first recess and is removed, and the part of the fixed disk through which the first recess passes and the excess lubricant is removed is moved in the radial direction of the communicating hole having an unequal cross-sectional area. The tip with a small cross-sectional area will pass through. In addition, when the fixed disk has a communication hole with an unequal cross-sectional area shape and a first recess, after the assembly of the thermal power control valve is completed, the rotating disk is moved from the first recess in the radial direction of the communication hole with an unequal cross-sectional area shape. Rotate in the direction toward the tip with the smaller cross-sectional area. According to this, the portion of the rotating disk from which excess lubricant has been removed in the first recess passes through the tip of the communicating hole having an unequal cross-sectional area shape. Therefore, clogging by the lubricant does not occur in the portion of the communication hole having a shape of unequal cross-sectional area where the radial cross-sectional area is small. Therefore, even though a lubricant is used to bring the stationary disk and rotating disk into close contact with each other, the accuracy of adjusting the gas supply amount can be ensured.

また、本発明においては、前記他方のディスクに、前記配置円上で、当該ディスクの連通孔から周方向他方に離れた部分に位置させて、前記一方のディスクに対する当接面から窪んだ第２凹部を形成し、或いは、前記一方のディスクに、前記配置円上で、不等断面積形状の連通孔から周方向一方に離れた部分に位置させて、前記他方のディスクに対する当接面から窪んだ第２凹部を形成し、これら第２凹部の底部に、ガスバーナへのガス供給量の最小量を規定するオリフィス孔を形成することが望ましい。これによれば、第２凹部内の空間に潤滑剤を溜めて、オリフィス孔の潤滑剤による目詰まりを防止し、ガスバーナへのガス供給量の最小量を正確に決めることができる。 Further, in the present invention, a second disk is provided on the other disk, located on the arrangement circle at a part remote from the communicating hole of the disk in the other circumferential direction, and recessed from the contact surface with respect to the one disk. A recess is formed in the one disk, or the recess is located in a part of the one disk on the arrangement circle that is remote from the communicating hole having an unequal cross-sectional area shape in one direction in the circumferential direction, and is recessed from the abutment surface for the other disk. It is desirable to form second recesses, and to form orifice holes at the bottoms of these second recesses, which define the minimum amount of gas supplied to the gas burner. According to this, it is possible to store the lubricant in the space within the second recess, prevent clogging of the orifice hole with the lubricant, and accurately determine the minimum amount of gas to be supplied to the gas burner.

本発明の実施形態の火力調節弁の切断側面図。FIG. 1 is a cutaway side view of a thermal power control valve according to an embodiment of the present invention. 実施形態の火力調節弁の固定ディスクと回転ディスクの斜め上方から見た斜視図。FIG. 2 is a perspective view of a fixed disk and a rotating disk of the thermal power control valve according to the embodiment, as seen diagonally from above. 実施形態の火力調節弁の固定ディスクの斜め下方から見た斜視図。FIG. 3 is a perspective view of the fixed disk of the firepower control valve according to the embodiment, as seen diagonally from below.

図１を参照して、本発明の実施形態の火力調節弁は、ガスバーナＢへのガス供給路の一部となる弁室１１が内部に形成されたバルブケース１を備えている。弁室１１は、バルブケース１の上面に開口している。そして、バルブケース１の上面に、弁室１１を覆うようにして固定ディスク２を締結し、固定ディスク２の上に、ガスバーナＢに連なるガス供給路の下流側部分Ｇを接続する流出側ジョイント部材１２を締結している。 Referring to FIG. 1, the thermal power control valve according to the embodiment of the present invention includes a valve case 1 in which a valve chamber 11 that becomes part of a gas supply path to a gas burner B is formed. The valve chamber 11 is open on the upper surface of the valve case 1. A fixed disk 2 is fastened to the upper surface of the valve case 1 so as to cover the valve chamber 11, and on the fixed disk 2 is an outflow side joint member that connects the downstream part G of the gas supply path connected to the gas burner B. 12 have been concluded.

弁室１１内には、固定ディスク２に対向する回転ディスク３が配置されている。回転ディスク３は、ステッピングモータ等の電動モータ４の出力軸４１に連結子４２を介して連結され、電動モータ４の作動で回転駆動される。また、連結子４２と回転ディスク３との間にバネ５を介設し、このバネ５で回転ディスク３を固定ディスク２側（上方）に付勢している。そして、固定ディスク２と回転ディスク３との当接面に潤滑剤（グリスやオイル等）を塗布し、回転ディスク３が固定ディスク２に潤滑剤を介して密着した状態で回転するようにしている。 A rotary disk 3 facing the fixed disk 2 is arranged within the valve chamber 11 . The rotating disk 3 is connected to an output shaft 41 of an electric motor 4 such as a stepping motor via a connector 42, and is rotationally driven by the operation of the electric motor 4. Further, a spring 5 is interposed between the connector 42 and the rotating disk 3, and the spring 5 urges the rotating disk 3 toward the fixed disk 2 (upward). Then, a lubricant (grease, oil, etc.) is applied to the contact surfaces between the fixed disk 2 and the rotating disk 3, so that the rotating disk 3 rotates while being in close contact with the fixed disk 2 via the lubricant. .

図２を参照して、固定ディスク２と回転ディスク３とには、互いに同一半径の配置円２ａ，３ａ上に位置させて連通孔が形成されている。ここで、固定ディスク２には、径方向幅が等幅で周方向にのびる通常の連通孔６が形成され、回転ディスク３には、周方向一方（上方から見て時計方向）に向かって径方向断面積が次第に小さくなる不等断面積形状の連通孔７が形成されている。そして、固定ディスク２の連通孔６に重なる不等断面積形状の連通孔７の部分の位置が回転ディスク３の回転により連続的に変化して、ガスバーナＢへのガス供給量が連続的に可変調節されるようにしている。 Referring to FIG. 2, communication holes are formed in fixed disk 2 and rotary disk 3 so as to be located on arrangement circles 2a and 3a having the same radius. Here, a normal communication hole 6 is formed in the fixed disk 2 and extends in the circumferential direction with equal width in the radial direction, and in the rotating disk 3, the hole 6 has a diameter extending toward one side in the circumferential direction (clockwise when viewed from above). The communication hole 7 is formed in an unequal cross-sectional area shape in which the cross-sectional area in the direction becomes gradually smaller. The position of the communicating hole 7 having an unequal cross-sectional area that overlaps the communicating hole 6 of the fixed disk 2 changes continuously as the rotating disk 3 rotates, and the amount of gas supplied to the gas burner B is continuously varied. I'm trying to adjust it.

ここで、不等断面積形状の連通孔７の周方向他方寄りの部分は、ディスク板厚方向に貫通する貫通孔７１で構成され、貫通孔７１から周方向一方にのびる不等断面積形状の連通孔７の部分は、ディスク板厚方向に貫通しない凹溝７２で構成されると共に、径方向幅が次第に狭くなっている。尚、凹溝７２は、溝深さが周方向一方に向けて次第に浅くなっているが、溝深さを一定にしてもよい。また、ディスク板厚が大きく、溝深さを大きく変化させることができるなら、貫通孔７１から周方向一方にのびる不等断面積形状の連通孔７の部分を、径方向幅が一定で、溝深さが次第に浅くなる凹溝で構成することも可能であり、更に、不等断面積形状の連通孔７を、径方向幅が周方向一方に向けて次第に狭くなる、周方向全長に亘る貫通孔で構成することも可能である。 Here, the other side circumferentially of the communicating hole 7 having an unequal cross-sectional area is constituted by a through-hole 71 that penetrates in the disk thickness direction, and has an unequal cross-sectional area extending from the through-hole 71 to one side in the circumferential direction. The communication hole 7 portion is constituted by a concave groove 72 that does not penetrate in the disk thickness direction, and has a radial width that gradually becomes narrower. Although the groove depth of the groove 72 gradually becomes shallower toward one side in the circumferential direction, the groove depth may be constant. Furthermore, if the disk thickness is large and the groove depth can be changed greatly, the portion of the communicating hole 7 extending from the through hole 71 in one direction in the circumferential direction and having an unequal cross-sectional area shape may be formed into a groove with a constant width in the radial direction. It is also possible to configure the communication hole 7 with a concave groove whose depth gradually becomes shallower, and furthermore, the communication hole 7 having an unequal cross-sectional area can be formed by penetrating the communication hole 7 over the entire length in the circumferential direction, with the radial width gradually narrowing toward one side in the circumferential direction. It is also possible to consist of holes.

ところで、不等断面積形状の連通孔７を形成した場合、固定ディスク２と回転ディスク３との密着のために潤滑剤を用いると、不等断面積形状の連通孔７の径方向断面積の小さい部分が潤滑剤により目詰まりすることがある。そして、ガスバーナＢへのガス供給量が弱火側で設定量より減少し、ガス供給量の調節精度が悪くなってしまうことがある。 By the way, when the communicating hole 7 having an unequal cross-sectional area shape is formed, if a lubricant is used to bring the fixed disk 2 and the rotating disk 3 into close contact, the radial cross-sectional area of the communicating hole 7 having an unequal cross-sectional area shape will be reduced. Small parts may become clogged with lubricant. Then, the amount of gas supplied to the gas burner B may decrease from the set amount on the low flame side, and the accuracy of adjusting the amount of gas supplied may deteriorate.

そこで、本実施形態では、回転ディスク３に、上記配置円３ａ上で不等断面積形状の連通孔７から離れた部分に位置させて、固定ディスク２に対する当接面たる上面から窪んだ第１凹部８を形成している。第１凹部８は、不等断面積形状の連通孔７の周方向一方の端部寄りの所定部分の径方向幅よりも大径である。尚、この所定部分は、径方向断面積がここより小さくなると潤滑剤による目詰まりを生ずる可能性がある部分に設定される。そして、火力調節弁の組立完了後に、回転ディスク３を、不等断面積形状の連通孔７の周方向一方の端部、即ち、径方向断面積の小さい先端部から第1凹部８に向かう方向（上方から見て時計方向）に回転させる。 Therefore, in the present embodiment, a first recessed portion of the rotary disk 3 is located on the arrangement circle 3a at a portion away from the communication hole 7 having an unequal cross-sectional area shape , and is recessed from the upper surface that is the contact surface for the fixed disk 2. A recess 8 is formed. The first recess 8 has a diameter larger than the radial width of a predetermined portion of the communicating hole 7 having an unequal cross-sectional area near one end in the circumferential direction. Note that this predetermined portion is set at a portion where clogging due to lubricant may occur if the radial cross-sectional area is smaller than this. After the assembly of the thermal power control valve is completed, the rotary disk 3 is moved in the direction toward the first recess 8 from one end in the circumferential direction of the communication hole 7 having an unequal cross-sectional area, that is, from the tip having a small radial cross-sectional area. (clockwise when viewed from above).

これによれば、余分な潤滑剤が第１凹部８に入って除去され、第１凹部８が通過して余分な潤滑剤が除去された固定ディスク２の部分を不等断面積形状の連通孔７の径方向断面積の小さい先端部が通ることになる。回転ディスク３を５～２０回回転させれば、余分な潤滑剤は全て第１凹部８に入り、以後どのように回転ディスク３を回転させても、不等断面積形状の連通孔７の径方向断面積の小さい部分の潤滑剤による目詰まりは生じない。従って、固定ディスク２と回転ディスク３との密着のために潤滑剤を用いているにも拘わらず、ガス供給量の調節精度を確保できる。 According to this, the excess lubricant enters the first recess 8 and is removed, and the portion of the fixed disk 2 through which the first recess 8 passes and the excess lubricant is removed is connected to the communicating hole having an unequal cross-sectional area. The tip portion of No. 7 having a small radial cross-sectional area passes through. If the rotating disk 3 is rotated 5 to 20 times, all the excess lubricant will enter the first recess 8, and no matter how the rotating disk 3 is rotated from then on, the diameter of the communicating hole 7 with an unequal cross-sectional area will remain constant. Clogging due to lubricant does not occur in portions with small directional cross-sectional areas. Therefore, even though a lubricant is used to bring the stationary disk 2 and the rotating disk 3 into close contact, the accuracy of adjusting the gas supply amount can be ensured.

また、本実施形態では、固定ディスク２と回転ディスク３とのうち不等断面積形状の連通孔７を形成したディスクとは異なるディスク、即ち、固定ディスク２に、図３に示す如く、上記配置円２ａ上で、固定ディスク２の連通孔６から周方向他方（上方から見て反時計方向、下方から見て時計方向）に離れた部分に位置させて、回転ディスク３に対する当接面たる下面から窪んだ第２凹部９を形成している。そして、第２凹部９の底部に、ガスバーナＢへのガス供給量の最小量を規定するオリフィス孔９１を形成している。 In addition, in this embodiment, the above-mentioned arrangement is made in the fixed disk 2, which is different from the disk in which the communication hole 7 having an unequal cross-sectional area shape is formed between the fixed disk 2 and the rotary disk 3, that is, the fixed disk 2, as shown in FIG. A lower surface, which is a contact surface for the rotating disk 3, is located on the circle 2a at a part remote from the communication hole 6 of the fixed disk 2 in the other circumferential direction (counterclockwise when viewed from above, clockwise when viewed from below). A second recess 9 is formed. An orifice hole 91 is formed at the bottom of the second recess 9 to define the minimum amount of gas supplied to the gas burner B.

これによれば、回転ディスク３を不等断面積形状の連通孔７が連通孔６に重ならずに第２凹部９のみに重なる位置に回転させたときに、オリフィス孔９１で規定される最小量のガスがガスバーナＢに供給される。そして、第２凹部９内の空間に潤滑剤を溜めることができるため、オリフィス孔９１の潤滑剤による目詰まりを防止し、ガスバーナＢへのガス供給量の最小量を正確に決めることができる。 According to this, when the rotating disk 3 is rotated to a position where the communicating hole 7 having an unequal cross-sectional area does not overlap the communicating hole 6 but overlaps only the second recess 9, the minimum value defined by the orifice hole 91 is amount of gas is supplied to gas burner B. Since the lubricant can be stored in the space within the second recess 9, clogging of the orifice hole 91 with the lubricant can be prevented, and the minimum amount of gas supplied to the gas burner B can be accurately determined.

尚、本実施形態では、固定ディスク２の上面に、オリフィス孔９１が開口する凹部９２を形成しているが、この凹部９２を省略し、固定ディスク２のフラットな上面にオリフィス孔９１を開口させるようにしてもよい。 In this embodiment, a recess 92 in which the orifice hole 91 opens is formed on the upper surface of the fixed disk 2, but this recess 92 is omitted and the orifice hole 91 is opened on the flat upper surface of the fixed disk 2. You can do it like this.

また、図２に仮想線で示す如く、不等断面積形状の連通孔７を形成したディスクである回転ディスク３に、上記配置円３ａ上で、不等断面積形状の連通孔７から周方向一方（上方から見て時計方向）に離れた部分に位置させて、固定ディスク２に対する当接面たる上面から窪んだ第２凹部９を形成し、この第２凹部９の底部に、ガスバーナＢへのガス供給量の最小量を規定するオリフィス孔９１を形成してもよい。このものでは、回転ディスク３を、第２凹部９のみが固定ディスク２の連通孔６に重なる位置に回転させたときに、オリフィス孔９１で規定される最小量のガスがガスバーナＢに供給される。更に、上記と同様にオリフィス孔９１の潤滑剤による目詰まりを防止できる。 Further, as shown by the imaginary lines in FIG. 2, the rotary disk 3, which is a disk in which a communication hole 7 having an unequal cross-sectional area shape is formed, is placed on the arrangement circle 3a from the communication hole 7 having an unequal cross-sectional area shape in a circumferential direction. A second recess 9 recessed from the upper surface, which is the abutting surface for the fixed disk 2, is formed at a part away from one side (clockwise when viewed from above), and a gas burner B is connected to the bottom of the second recess 9. An orifice hole 91 may be formed to define the minimum amount of gas supplied. In this case, when the rotating disk 3 is rotated to a position where only the second recess 9 overlaps the communication hole 6 of the fixed disk 2, the minimum amount of gas defined by the orifice hole 91 is supplied to the gas burner B. . Furthermore, as described above, clogging of the orifice hole 91 due to lubricant can be prevented.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、不等断面積形状の連通孔７と第１凹部８とを固定ディスク２に形成し、回転ディスク３には通常の連通孔６を形成してもよい。この場合は、火力調節弁の組立完了後に、回転ディスク３を第１凹部８から不等断面積形状の連通孔７の径方向断面積の小さな先端部に向かう方向に回転させる。これによれば、第１凹部８で余分な潤滑剤が除去された回転ディスク３の部分が不等断面積形状の連通孔７の径方向断面積の小さな先端部を通過することになる。そのため、上記実施形態と同様に不等断面積形状の連通孔７の径方向断面積の小さな部分の潤滑剤による目詰まりを防止することができる。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, the communication hole 7 and the first recess 8 having an unequal cross-sectional area shape may be formed in the fixed disk 2, and the normal communication hole 6 may be formed in the rotating disk 3. In this case, after the assembly of the thermal power control valve is completed, the rotary disk 3 is rotated in a direction from the first recess 8 toward the tip portion of the communication hole 7 having an unequal cross-sectional area shape and having a small radial cross-sectional area. According to this, the portion of the rotary disk 3 from which excess lubricant has been removed in the first recess 8 passes through the tip portion of the communication hole 7 having an unequal cross-sectional area shape and having a small radial cross-sectional area. Therefore, similarly to the embodiment described above, it is possible to prevent clogging of the portion of the communication hole 7 having an unequal cross-sectional area with a small radial cross-sectional area due to the lubricant.

Ｂ…ガスバーナ、２…固定ディスク、３…回転ディスク、２ａ，３ａ…配置円、６…連通孔、７…不等断面積形状の連通孔、７１…貫通孔、７２…凹溝、８…第１凹部、９…第２凹部、９１…オリフィス孔。
B... Gas burner, 2... Fixed disk, 3... Rotating disk, 2a, 3a... Arrangement circle, 6... Communication hole, 7... Communication hole with unequal cross-sectional area shape, 71... Through hole, 72... Concave groove, 8... No. 1 recess, 9...second recess, 91...orifice hole.

Claims (3)

ガスバーナへのガス供給路に介設される、固定ディスクと、固定ディスクに潤滑剤を介して密着した状態で回転可能な回転ディスクとを備える火力調節弁であって、固定ディスクと回転ディスクとに互いに同一半径の配置円上に位置させて連通孔が形成され、固定ディスクと回転ディスクとの一方のディスクの連通孔は、周方向一方に向かって径方向断面積が次第に小さくなる不等断面積形状に形成され、固定ディスクと回転ディスクとの他方のディスクの連通孔に重なる不等断面積形状の連通孔の部分の位置が回転ディスクの回転により連続的に変化して、ガスバーナへのガス供給量が連続的に可変調節されるようにしたものにおいて、
前記一方のディスクに、前記配置円上で前記不等断面積形状の連通孔から離れた部分に位置させて、前記他方のディスクに対する当接面から窪んだ第１凹部が形成されることを特徴とする火力調節弁。 A thermal power control valve that is provided in a gas supply path to a gas burner and includes a fixed disk and a rotary disk that can rotate while being in close contact with the fixed disk via a lubricant, the fixed disk and the rotating disk comprising: Communicating holes are formed so that they are located on a circle with the same radius, and the communicating hole of one of the fixed disks and the rotating disk has an unequal cross-sectional area in which the radial cross-sectional area gradually decreases toward one side in the circumferential direction. The position of the communicating hole of the fixed disk and the rotating disk, which overlaps the communicating hole of the other disk and has an unequal cross-sectional area shape, changes continuously as the rotating disk rotates, thereby supplying gas to the gas burner. In a device in which the amount is continuously and variably adjusted,
A first recess is formed in the one disk, the first recess being recessed from the contact surface with respect to the other disk, located on the arrangement circle at a portion away from the communication hole having an unequal cross-sectional area shape. Fire power control valve. 前記他方のディスクに、前記配置円上で、当該ディスクの連通孔から周方向他方に離れた部分に位置させて、前記一方のディスクに対する当接面から窪んだ第２凹部が形成され、第２凹部の底部に、ガスバーナへのガス供給量の最小量を規定するオリフィス孔が形成されることを特徴とする請求項１記載の火力調節弁。 A second recess is formed in the other disk, located on the arrangement circle at a part remote from the communication hole of the disk in the other circumferential direction, and recessed from the abutment surface for the one disk, 2. The thermal power control valve according to claim 1, wherein an orifice hole is formed at the bottom of the recess to define a minimum amount of gas to be supplied to the gas burner. 前記一方のディスクに、前記配置円上で、前記不等断面積形状の連通孔から周方向一方に離れた部分に位置させて、前記他方のディスクに対する当接面から窪んだ第２凹部が形成され、第２凹部の底部に、ガスバーナへのガス供給量の最小量を規定するオリフィス孔が形成されることを特徴とする請求項１記載の火力調節弁。 A second recess is formed in the one disk, the second recess being recessed from the contact surface with respect to the other disk, located on the arrangement circle at a part circumferentially away from the communication hole having the unequal cross-sectional area shape. 2. The thermal power control valve according to claim 1, wherein an orifice hole is formed at the bottom of the second recess to define a minimum amount of gas to be supplied to the gas burner.
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