JP2018165540A5

JP2018165540A5 -

Info

Publication number: JP2018165540A5
Application number: JP2017063159A
Authority: JP
Filing date: 2017-03-28
Publication date: 2020-04-09
Anticipated expiration: 2037-03-28

Description

本発明の第一の態様によれば、第一流路と、第二流路と、第一流路と第二流路とを連通する弁室と、を備えるバルブ本体と、弁室内の第一流路側に位置するシートと、弁室内の第二流路側に位置し且つ第一流路及び第二流路を流れる流体の流量を調整するように構成される流量調整シートと、シートと流量調整シートとの間に回動自在に配置され、弁体流路となる貫通孔を有し、第一流路と第二流路とを連通または遮断させるボール弁体と、を備えるボールバルブにおいて、流量調整シートは、環状のシート部と、シート部の内周側に位置する流量調整部と、を備え、シート部は、ボール弁体が摺動し且つ流体を密封するシール面を備え、流量調整部は、第二流路と弁室とを連通する流量調整開口と、シール面に連続的に接続されていてボール弁体から離間するとともに流体を誘導するように構成される誘導面と、を備え、誘導面とボール弁体との隙間が、誘導面の外周縁から流路軸線に近づくにつれて連続的に大きくなり、シール面がボール弁体の半径と同一の半径の球面であり、誘導面がボール弁体の半径よりも小さい半径の球面である、ボールバルブが提供される。 According to the first aspect of the present invention, a valve body including a first flow path, a second flow path, and a valve chamber communicating the first flow path and the second flow path, and a first flow path side in the valve chamber. A flow control sheet positioned on the second flow path side in the valve chamber and configured to adjust the flow rate of the fluid flowing through the first flow path and the second flow path; A ball valve, which is rotatably disposed therebetween and has a through hole serving as a valve body flow path, and a ball valve body that communicates or shuts off the first flow path and the second flow path. An annular seat portion, and a flow rate adjusting portion located on the inner peripheral side of the seat portion, the seat portion includes a seal surface on which a ball valve element slides and seals fluid, and the flow rate adjusting portion includes A flow control opening that communicates the second flow path with the valve chamber, And a configured guide surface to direct the fluid as well as away from the valve body, the gap between the guide surface and the ball valve body, continuously increases toward the outer circumferential edge of the guide surface in the flow path axis Thus, a ball valve is provided in which the sealing surface is a spherical surface having the same radius as the radius of the ball valve body, and the guiding surface is a spherical surface having a radius smaller than the radius of the ball valve body .

すなわち、本発明の第一の態様では、流量調整シートの誘導面がシール面に連続的に接続されるとともに、ボール弁体から離間している。また、誘導面とボール弁体との隙間は誘導面の外周縁から流路軸線に近づくにつれて連続的に大きくなっている。この態様により、ボール弁体が回動するときにボール弁体と流量調整部とを非接触にできるので、ボール弁体が流量調整部に接触して摺動することがなく、流量調整シートの摩耗や摺動による異物の発生を低減することができる。さらに、弁体流路を流れる流体が誘導面に沿って誘導面の外周縁から中心に向かって流れやすくなるので、誘導面とボール弁体との隙間に滞留部が発生しにくくなり、隙間を効果的にフラッシングでき、隙間に異物が堆積したり、雑菌が発生したりするのを抑えられる。また、誘導面が第二流路に向かって膨らむ球面となるので、弁体流路を流れる流体がより誘導面の外周縁に沿って流れやすくなり、誘導面の外周縁をより効果的にフラッシングできる。 That is, in the first aspect of the present invention, the guide surface of the flow rate adjusting sheet is continuously connected to the sealing surface and is separated from the ball valve body. In addition, the gap between the guide surface and the ball valve body continuously increases from the outer peripheral edge of the guide surface toward the flow path axis. According to this aspect, when the ball valve element rotates, the ball valve element and the flow rate adjusting section can be brought into non-contact with each other. The generation of foreign matter due to wear and sliding can be reduced. Furthermore, since the fluid flowing through the valve body flow path easily flows from the outer peripheral edge of the guide surface toward the center along the guide surface, a stagnant portion is less likely to be generated in a gap between the guide surface and the ball valve body, and the gap is reduced. Flushing can be performed effectively, and the accumulation of foreign substances in the gaps and the generation of various bacteria can be suppressed. Further, since the guide surface is a spherical surface that expands toward the second flow path, the fluid flowing through the valve body flow path is more likely to flow along the outer peripheral edge of the guide surface, and the outer peripheral edge of the guide surface is more effectively flushed. it can.

本発明の第二の態様によれば、第一の態様において、シート部が第一流路と弁室とを連通する連通溝を有し、ボール弁体が、弁体流路に直交するとともに、弁体流路よりも小さい内径の補助流路を有し、少なくとも全閉状態のときに補助流路が弁体流路と第二流路とを連通する、ボールバルブが提供される。 According to a second aspect of the present invention, Oite the first state-like, sheet portion has a communication groove for communicating the first passage and the valve chamber, the ball valve body is perpendicular to the valve body flow passage A ball valve having an auxiliary flow path having an inner diameter smaller than that of the valve element flow path, and the auxiliary flow path connecting the valve element flow path and the second flow path at least when the valve is fully closed. .

本発明の第三の態様によれば、第二の態様において、補助流路が、ボール弁体の外周側に位置する大径流路と、大径流路と弁体流路とを連通し且つ大径流路よりも小さい内径の小径流路と、を有し、小径流路の長さは大径流路よりも短い、ボールバルブが提供される。 According to the third aspect of the present invention, in the second aspect, the auxiliary flow path communicates with the large-diameter flow path located on the outer peripheral side of the ball valve body, the large-diameter flow path and the valve body flow path, and A small diameter flow path having an inner diameter smaller than the diameter flow path, wherein the length of the small diameter flow path is shorter than that of the large diameter flow path.

本発明の第四の態様によれば、第三の態様において、小径流路の内径が０．１ｍｍ以上１ｍｍ未満である、ボールバルブが提供される。 According to a fourth aspect of the present invention, there is provided the ball valve according to the third aspect, wherein the inside diameter of the small-diameter flow path is 0.1 mm or more and less than 1 mm.

Claims

A first flow path, a second flow path, and a valve body communicating the first flow path and the second flow path, a valve body including:
A sheet located on the first flow path side in the valve chamber;
A flow rate adjustment sheet located on the second flow path side in the valve chamber and configured to adjust a flow rate of a fluid flowing through the first flow path and the second flow path;
A ball valve element that is rotatably disposed between the seat and the flow rate adjustment sheet, has a through-hole serving as a valve element channel, and communicates or shuts off the first channel and the second channel. A ball valve comprising:
The flow rate adjustment sheet includes an annular sheet portion and a flow rate adjustment portion located on an inner peripheral side of the sheet portion,
The seat portion includes a sealing surface on which the ball valve body slides and seals the fluid.
The flow rate adjustment unit is connected to the flow rate adjustment opening that communicates the second flow path and the valve chamber, and is continuously connected to the seal surface so as to separate from the ball valve body and guide the fluid. A guiding surface to be configured,
Clearance between the ball valve member and the guide surface is Ri Na continuously increases toward the passage axis from the outer peripheral edge of the guide surface,
The sealing surface is a spherical surface having the same radius as the radius of the ball valve body,
A ball valve, wherein the guide surface is a spherical surface having a radius smaller than a radius of the ball valve body .

The seat portion has a communication groove communicating the first flow path and the valve chamber,
The ball valve element has an auxiliary flow path that is orthogonal to the valve element flow path and has an inner diameter smaller than the valve element flow path. The ball valve according to claim 1 , wherein the ball valve communicates with the second flow path.

The auxiliary flow path, a large-diameter flow path located on the outer peripheral side of the ball valve element, a small-diameter flow path communicating the large-diameter flow path and the valve element flow path and having an inner diameter smaller than the large-diameter flow path, Has,
The ball valve according to claim 2 , wherein the length of the small-diameter passage is shorter than that of the large-diameter passage.

The ball valve according to claim 3 , wherein an inner diameter of the small-diameter flow path is 0.1 mm or more and less than 1 mm.