JPS606738Y2 - Gas meter rotary valve seat - Google Patents

Description

【考案の詳細な説明】 本考案は、ガスメータの回転弁用弁座の改良に係る。[Detailed explanation of the idea] The present invention relates to an improvement of a valve seat for a rotary valve of a gas meter.

ガスメータにおいて、計量膜収容器体の内に張設された
計量膜にのう膜を介して翼軸を取付け、計量室へのガス
の吸入および排気にもとづく計量膜の膨縮による翼軸の
揺動運動を、クランク機構や歯車輪列等の伝達機構を介
して、一方ではメータの積算計機構へ伝達してガスの流
量を積算表示し、他方では計量室へのガスの吸入および
排気を行なう回転弁へ伝達してこの回転弁を弁座上で摺
動回転するように構成されているものが、公知である。In a gas meter, a blade shaft is attached via a membrane to a metering membrane stretched inside a metering membrane housing body, and the blade shaft swings due to expansion and contraction of the metering membrane due to the intake and exhaust of gas into the metering chamber. The dynamic motion is transmitted to the totalizer mechanism of the meter via a transmission mechanism such as a crank mechanism or a gear train, so that the gas flow rate is integrated and displayed, and on the other hand, the gas is sucked into and exhausted from the metering chamber. It is known that the signal is transmitted to a rotary valve so that the rotary valve slides and rotates on a valve seat.

第１図は上記の如き公知のガスメータに使用される回転
弁およびその弁座の一例を示す外観図であり、１は回転
弁、２は回転弁の外側面に形成された溝、３は回転弁の
摺動面に摺接する弁座である。FIG. 1 is an external view showing an example of a rotary valve and its valve seat used in the above-mentioned known gas meter, in which 1 is a rotary valve, 2 is a groove formed on the outer surface of the rotary valve, and 3 is a rotary valve seat. This is a valve seat that comes into sliding contact with the sliding surface of the valve.

また、鎖線で示しである部分４は伝達機構に連結されて
いる回転軸、５は回転軸先端に形成され回転弁１をその
外側から回転自在に保持するピン、６は一端が回転軸４
に固着され他端が回転弁１の溝２に係合しているクラン
クレバーである。Further, a portion 4 indicated by a chain line is a rotating shaft connected to the transmission mechanism, 5 is a pin formed at the tip of the rotating shaft and rotatably holds the rotary valve 1 from the outside, and 6 is a pin whose one end is attached to the rotating shaft 4.
This is a crank lever which is fixed to the rotary valve 1 and whose other end is engaged with the groove 2 of the rotary valve 1.

したがって、クランクレバー６の回転によって回転弁１
が弁座３上で回転駆動される。Therefore, the rotation of the crank lever 6 causes the rotary valve 1 to
is rotated on the valve seat 3.

第２図は第１図の縦断面図であり、７は回転弁１のガス
入口となる扇状通気孔、８は扇状通気孔７と対称の上側
閉止の扇状空間部、９は通気孔７と空間部８との間に位
置して空間部８に連通ずる上側閉止の中央空間部、１０
はピン５が係合される孔、１１および１２は弁座３側の
ガス通路となる通気孔である。FIG. 2 is a vertical cross-sectional view of FIG. 1, with reference numeral 7 representing a fan-shaped vent serving as the gas inlet of the rotary valve 1, 8 a closed fan-shaped space on the upper side symmetrical to the fan-shaped vent 7, and 9 indicating the ventilation hole 7. an upper-closed central space 10 located between the space 8 and communicating with the space 8;
11 and 12 are vent holes that serve as gas passages on the valve seat 3 side.

第３図は回転弁１の底面図であり、ガス入口としての通
気孔７および空間部８，９に連なりガス出口となる通気
孔１３を除く部分１４は平らな摺動面となっている。FIG. 3 is a bottom view of the rotary valve 1, and the portion 14 except for the vent hole 7 serving as a gas inlet and the vent hole 13 connecting to the spaces 8 and 9 and serving as a gas outlet is a flat sliding surface.

第４図は弁座３の平面図であり、円形状の外わく１５と
中央通気孔１２を限定する円形状の内枠１６とで囲んだ
部分が仕切りブ１７により４等分に仕切られ、各々対向
位置に通気孔１１および封じ部１８が形成されている。FIG. 4 is a plan view of the valve seat 3, in which a portion surrounded by a circular outer frame 15 and a circular inner frame 16 that limits the central ventilation hole 12 is partitioned into four equal parts by a partition plate 17. A ventilation hole 11 and a sealing part 18 are formed at opposing positions.

しかして、回転弁１と弁座３とは、第３図および第４図
に示されている面が互に密接し、固定されている弁座３
に対して回転弁１が摺動回転されるものである。Therefore, the rotary valve 1 and the valve seat 3 have their surfaces shown in FIGS. 3 and 4 in close contact with each other, and the valve seat 3 is fixed.
The rotary valve 1 is slidably rotated relative to the rotary valve 1.

ところで、従来の弁座３は第４図に示した如き外わく１
５および内わく１６がともに円形状であり、これら内外
わくの円形状摺接路（上端面）を回転弁１の第３図に示
した如き摺動面１４が摺接しながら回転するものである
ため、回転弁の摺動面はいつも決った部位が弁座の摺接
路を摺動し、その結果回転弁１の摺動面１４は偏って摩
耗し、しかもこの摩耗によって生じた摩耗粉が回転弁の
摺動面と弁座の摺接路との間に滞留してガス中の油分と
粘着状態となり、回転弁の円滑な回転運動を妨げてしま
うなどの不都合があった。By the way, the conventional valve seat 3 has an outer frame 1 as shown in FIG.
5 and the inner frame 16 are both circular in shape, and the rotary valve 1 rotates while the sliding surface 14 as shown in FIG. Therefore, a fixed part of the sliding surface of the rotary valve always slides on the sliding contact path of the valve seat, and as a result, the sliding surface 14 of the rotary valve 1 wears unevenly, and the wear powder generated by this wear is This has been disadvantageous in that it accumulates between the sliding surface of the rotary valve and the sliding contact path of the valve seat and becomes sticky with the oil in the gas, impeding the smooth rotational movement of the rotary valve.

本考案は、このような従来の不都合を解消するためにな
されたものであり、前述した如き回転弁の偏摩耗が特に
回転弁の回転周速度の小さい内側の摺動面部分よりも回
転周速度が大きくなる外側の摺動面部分付近で顕著に発
生することに着目し、この回転弁の外側の摺動面部分に
おける偏摩耗を抑えるようにしたものである。The present invention has been made in order to eliminate such conventional inconveniences, and the uneven wear of the rotary valve as described above occurs particularly when the rotational circumferential speed of the rotary valve is lower than that of the inner sliding surface portion where the rotational circumferential speed is low. Focusing on the fact that frictional wear occurs conspicuously in the vicinity of the outer sliding surface portion where it becomes larger, uneven wear on the outer sliding surface portion of this rotary valve is suppressed.

以下図面を参照して本考案の実施例について詳述する。Embodiments of the present invention will be described in detail below with reference to the drawings.

第５図および第６図に示す如く、ガスメータの回転弁用
弁座３の外わく２５は本考案にしたがって楕円形状（第
５図）又は方円形状（第６図）とされ、その他の部分は
第４図に示した従来の弁座と同一とされている。As shown in FIGS. 5 and 6, the outer frame 25 of the rotary valve seat 3 of the gas meter has an elliptical shape (FIG. 5) or a rectangular shape (FIG. 6) according to the present invention, and the other parts is the same as the conventional valve seat shown in FIG.

このように楕円形状又は方円形状の外わ＜２５を有する
弁座３上を第３図に示した回転弁１が摺動回転する構成
とすることにより、回転弁１の摺動面１４の外側部分は
弁座３の外わく２５上面上をたえずその接触部位を変え
て摺動回転することになり、その結果回転弁１の摺動面
１４の外側部分が偏って摩耗されることが低減され、こ
れにより摩耗粉の発生も減少され、これら摩耗粉がガス
中の油分と粘着して回転弁の円滑な回転運動を妨げると
いう事態も軽減される。By configuring the rotary valve 1 shown in FIG. 3 to slide and rotate on the valve seat 3 having an elliptical or rectangular outer diameter <25, the sliding surface 14 of the rotary valve 1 is The outer portion slides and rotates on the upper surface of the outer frame 25 of the valve seat 3 while constantly changing its contact area, and as a result, uneven wear of the outer portion of the sliding surface 14 of the rotary valve 1 is reduced. As a result, the generation of wear particles is reduced, and the situation where these wear particles stick to oil in the gas and interfere with the smooth rotational movement of the rotary valve is also reduced.

なお、弁座３の内わく１６は従来通り円形状としている
が、その理由は回転弁の回転周速度が小さい内側の摺動
面部分ではそれほど偏って摩耗することもなく、またた
とえ楕円形状又は方円形状にしたとしてもそれほど効果
が期待できないからである。The inner frame 16 of the valve seat 3 has a circular shape as before, but this is because the inner sliding surface portion of the rotary valve, where the peripheral speed of rotation is small, does not wear unevenly, and even if the inner frame 16 has an elliptical shape or This is because even if it is made into a rectangular shape, not much effect can be expected.

また、前述した弁座３はガスメータのダブルロータリー
バルブ用のものであって扇形部１８は封じ部とされてい
るが、これら扇形部も通気孔とされているワンロータリ
ーバルブ用の弁座にも本考案を同様に適用できることは
勿論である。Further, the valve seat 3 mentioned above is for a double rotary valve of a gas meter, and the fan-shaped part 18 is used as a sealing part, but these fan-shaped parts can also be used as a valve seat for a single rotary valve, which is used as a ventilation hole. Of course, the present invention can be similarly applied.

以上述べた如く、本考案によれば、弁座の外わくを楕円
形状又は方円形状にすることにより、回転弁の摺動面の
偏摩耗を有効に低減して回転弁の円滑な回転運動を維持
することができるガスメータの回転弁用弁座が提供され
る。As described above, according to the present invention, by making the outer frame of the valve seat into an elliptical or rectangular shape, uneven wear on the sliding surface of the rotary valve can be effectively reduced and smooth rotational movement of the rotary valve can be achieved. Provided is a valve seat for a rotary valve of a gas meter that can maintain the gas meter's rotary valve seat.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はガスメータの回転弁と弁座の一例を示す側面図
、第２図は第１図の縦断面図、第３図は回転弁の底面図
、第４図は従来の弁座の平面図、第５図および第６図は
本考案による弁座の二列を示す平面図である。 １・・・・・・回転弁、３・・・弁座、１１・・・・・
・通気孔、１２・・・・・・中央通気孔、１６・・・・
・・内わく、１７・・・・・・仕切りブ、１８・・・・
・・封じ部、２５・・・・・・外わく。Figure 1 is a side view showing an example of a rotary valve and valve seat of a gas meter, Figure 2 is a vertical sectional view of Figure 1, Figure 3 is a bottom view of the rotary valve, and Figure 4 is a plan view of a conventional valve seat. 5 and 6 are plan views showing two rows of valve seats according to the present invention. 1...Rotary valve, 3...Valve seat, 11...
・Vent hole, 12...Central ventilation hole, 16...
...Inner frame, 17...Partition, 18...
...Sealing part, 25... Outer frame.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 外わくと円形の中央通気孔を限定する内わくとて囲んだ
部分を仕切りブにより４等分に仕切り、一方の対向位置
に通気孔を形成し、また他方の対向位置に通気孔又は封
じ部を形成してなるガスメータの回転弁用弁座において
、前記外わくを楕円形状又は方円形状としたことを特徴
とするガスメータの回転弁用弁座。The area surrounded by the inner frame that defines the outer frame and the circular central ventilation hole is divided into four equal parts by a partition plate, and a ventilation hole is formed at one opposing position, and a ventilation hole or a sealing part is formed at the other opposing position. 1. A valve seat for a rotary valve of a gas meter, characterized in that the outer frame has an elliptical shape or a rectangular shape.