JPH03163286A - Dew preventing device of butterfly valve - Google Patents
Dew preventing device of butterfly valveInfo
- Publication number
- JPH03163286A JPH03163286A JP30152089A JP30152089A JPH03163286A JP H03163286 A JPH03163286 A JP H03163286A JP 30152089 A JP30152089 A JP 30152089A JP 30152089 A JP30152089 A JP 30152089A JP H03163286 A JPH03163286 A JP H03163286A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- insulating cover
- shaft cylinder
- actuator
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 230000002265 prevention Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 description 14
- 239000012530 fluid Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 238000009428 plumbing Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、バタフライ弁の防露装置に関し、更に詳し
くは管路を流過する流体と大気との温度差に基因して、
バタフライ弁の大気中に露出した部分に結露が生じて来
るのを防止するようにしたバタフライ弁の防露装置に関
する．
（従来の技術〉
従来、冷房や冷凍用配管の如き低温流体が流過する管路
は、流遇する流体と大気との温度差によって、大気中の
水分が管路外周面に結露して来るため、管路外周面を断
熱性のカバーで被覆し結露を防止する対策が採られてい
る．
このような断熱性のカバーにより、管路に取り付けられ
たバタフライ弁も、その弁本体を含む弁軸筒の一部は被
覆される．しかしながら、管路に対して直交して延び出
す弁軸筒並びに該弁軸筒の外端に連結されるアクチュエ
ータ等は、その形状が複雑であると共に、管路とは方向
性が異なり、断然被覆が困難であるため、断熱被覆する
ことなくそのまま大気中に露出されているのが現状であ
る．このため露出した弁軸筒やアクチュエータ外面が結
露した水滴で腐触したり，滴下した水滴で床面が汚れる
という問題があった。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to a dew prevention device for a butterfly valve.
This invention relates to a condensation prevention device for a butterfly valve that prevents condensation from forming on the part of the butterfly valve exposed to the atmosphere. (Conventional technology) Conventionally, in pipes through which low-temperature fluid flows, such as pipes for air conditioning and refrigeration, moisture in the atmosphere condenses on the outer circumferential surface of the pipe due to the temperature difference between the flowing fluid and the atmosphere. Therefore, measures are taken to prevent condensation by covering the outer circumferential surface of the pipeline with an insulating cover.Such an insulating cover protects the butterfly valve installed in the pipeline, including its valve body. A part of the stem tube is covered. However, the valve stem tube that extends perpendicularly to the pipe line and the actuator connected to the outer end of the valve stem tube have a complicated shape and are difficult to cover. The directionality is different from that of the actuator, making it difficult to cover it, so it is currently exposed to the atmosphere without any heat insulating coating.As a result, the exposed valve stem cylinder and the outer surface of the actuator are exposed to condensed water droplets. There were problems with corrosion and floor surfaces becoming dirty with dripping water droplets.
かかる弁軸筒やアクチュエータを断熱カバーで被覆する
ことも行われているが、弁軸筒やアクチュ工一夕は管路
と直交した方向に位置しているため、管路を被覆するカ
バーとは別体の断熱カバーが必要となると共に、外形状
が複雑でしかもアクチュエータはバタフライ弁の機能、
用途、使用場所，制御方式等に応じて形状、構造が異な
っているため、１つのバタフライ弁に対して多種類の断
熱カバーを用意しなければならない欠点があった．すな
わち、第１４図に示すように、バタフライ弁（１）は配
管パイプ（２ ）（２ ＞のフランジ（３ ）（３ ’
）間に挟み込まれ締着されており、配管パイプ（２ ）
（２ ＞並びにバタフライ弁（１）の弁本体は断熱カバ
ー（４）（４）で被覆されるが、配管パイプ（２ ）（
２ ’）と直交する方向に延び出す弁軸筒（５）とアク
チュエータ（６）は、該配管パイプ（２ ）（２ ）の
外周面を被覆することが出来ない．そこで、別体の断熱
カノ＜−（７）を用意し、弁軸筒（５）とアクチュエー
タ（６）とを一体に被覆している．
（発明が解決しようとする課題〉
この発明は、管路を直交する方向に延び出す弁軸筒及び
アクチュエータの防露を簡単且確実に達戒可能とぜんと
するものである．
（課題を解決するための手段）
上記課題を解決するために、この発明が採った手段は、
弁軸筒の外端に熱遮断板を介してアクチュエータを取り
付けると共に、弁軸筒の外周面に、内周面を弁軸筒の外
周面形状に做って成形した筒状の断熱カバーを被着し、
該筒状断熱カバーの一端を前記熱遮断板に接すると共に
、他端をバタフライ弁の弁本体外周面を断熱被覆する断
熱カバーに接合したことを特徴とする．
（実施例〉
以下に図面を参照しつつ、この発明の好ましい実施例を
詳細に説明する．図示のバタフライ弁（１）は従来周知
のバタフライ弁と実質的に同一の構造を有するものであ
る．すなわち図におし）で（１０）！よ内部に円筒状の
流体通路ク１１）を貫設した弁本体であり、内部に円板
状の弁体（１２）が回動自在に軸支される．流体通路（
１１）の内周面と弁体（１２）との間には、軟弾性のゴ
ム等からなるシートリング（１３）が介挿され、回動す
る弁体く１２〉の外周縁とシートリング（１３）との接
離により、流体通路（１１）の開放、閉止並びに流量の
制御が行われる．
弁体（１２〉の直径方向対向位置に、該弁体を軸支する
弁棒が取り付けられ、該弁棒の一方（１４）は駆動軸と
して、弁本体く１０〉の外周面から直径方向外方へ突出
した弁軸筒（５〉内を延び出しており、外端に該弁棒（
１４）を駆動するアクチュエータ（６）が連結される．
アクチュエータ（６）は弁軸（５）の外端に固定された
取付板上に取り付けられる．このような構造を有するバ
タフライ弁（１）が、第１３図に示すように配管フラン
ジ（３ ）（３ ）間に挟み込まれ、締付ボルト・ナッ
ト（８〉による締付にて、配管フランジ（３ ）（３
）間に固定、保持される．配管パイプ（２ ）（２ ’
）の外周面は、従来と同学に断熱カバー（４ ）（４
）でフランジ（３ ）（３ ）の部分まで被覆され断熱
される．更に、バタフライ弁（１）、配管フランジ（３
〉並びに弁軸筒（５）の一部が、前記断熱力バー《４〉
とは別体のリング状断熱力バー（９）で被覆され断熱さ
れる．この断熱カバー（９）は従来公知であり、第１４
図に示すアクチュエータ（６）を含んで被覆する断熱力
バー（７）に代って用いられているものである．しかし
ながら、かかるリング状断熱力バー（９）では弁軸筒（
５）の一部が被覆されるのみであり、弁軸筒（５）の残
部とアクチュエータ（６）が外気中へ露出しているため
、流過する流体から伝熱した熱と外気との温度差により
、露出した弁軸筒（５）やアクチュエータ（６）の外面
に水滴が結露して来るのを避けることが出来なかった．
そこで、この発明は、リング状断熱力バー（９〉では被
覆することの出来ない弁軸筒（５）の残りの部分を筒状
断熱カバー（１６）で被覆し、弁軸筒（５）の外周面を
大気と遮断すると共に、弁軸筒（５）の外端の取付板（
１５〉とアクチュエータ（６〉との間に断熱性の熱遮断
板（１７）を介挿して、弁軸筒（５〉とアクチェエータ
（６）との間を熱的に遮断したことを特徴とする．前記
した断熱カバー（４ ）（９ ）（１６）は好しくはポ
リウレタン、ボリプロビレン、ポリエチレン、ボリスチ
レン等の発泡成形体で形成される．かかる材料は優れた
断熱性能を有すると共に、軽く且刃物等による切断や整
形が容易である。The valve stem cylinder and actuator are sometimes covered with a heat insulating cover, but since the valve stem cylinder and actuator are located in a direction perpendicular to the pipe line, it is difficult to use a cover that covers the pipe line. A separate heat insulating cover is required, the external shape is complex, and the actuator has a butterfly valve function.
Since the shapes and structures differ depending on the purpose, place of use, control method, etc., there is a drawback that many types of insulation covers must be prepared for one butterfly valve. That is, as shown in Fig. 14, the butterfly valve (1) connects the flange (3) (3') of the piping pipe (2)
) is sandwiched and tightened between the plumbing pipes (2).
(2) and the valve body of the butterfly valve (1) are covered with a heat insulating cover (4) (4), but the piping pipe (2) (
The valve stem cylinder (5) and actuator (6) extending in a direction perpendicular to the piping (2') cannot cover the outer circumferential surface of the piping (2) (2). Therefore, a separate heat insulating cover (7) is prepared to integrally cover the valve stem cylinder (5) and the actuator (6). (Problems to be Solved by the Invention) This invention makes it possible to easily and reliably prevent condensation of the valve stem cylinder and actuator that extend in a direction perpendicular to the pipe line. Means for solving the above problem) The means taken by this invention are as follows.
The actuator is attached to the outer end of the valve stem cylinder via a heat shield plate, and the outer peripheral surface of the valve stem cylinder is covered with a cylindrical heat insulating cover whose inner circumferential surface is shaped to match the shape of the outer peripheral surface of the valve stem cylinder. Arrived,
One end of the cylindrical heat insulating cover is in contact with the heat shielding plate, and the other end is joined to a heat insulating cover that heats and covers the outer peripheral surface of the valve body of the butterfly valve. (Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the drawings.The illustrated butterfly valve (1) has substantially the same structure as a conventionally known butterfly valve. In other words, (10)! The valve body has a cylindrical fluid passage (11) running through it, and a disc-shaped valve body (12) is rotatably supported inside. Fluid passage (
A seat ring (13) made of soft elastic rubber or the like is inserted between the inner circumferential surface of the valve body (11) and the valve body (12). 13), the fluid passage (11) is opened and closed, and the flow rate is controlled. A valve stem that pivotally supports the valve body (12) is attached to a position facing the valve body (12) in the diametrical direction, and one of the valve stems (14) serves as a drive shaft that extends diametrically outward from the outer peripheral surface of the valve body (10). It extends inside the valve stem cylinder (5〉) that protrudes toward the outside, and the valve stem (5〉
14) is connected to the actuator (6).
The actuator (6) is mounted on a mounting plate fixed to the outer end of the valve stem (5). The butterfly valve (1) having such a structure is sandwiched between the piping flanges (3) (3) as shown in Fig. 13, and is tightened with tightening bolts and nuts (8>) to tighten the piping flanges (3). 3)(3
) is fixed and maintained between. Plumbing pipe (2) (2'
) is covered with a heat insulating cover (4) (4
) to cover and insulate the flange (3) (3). Furthermore, butterfly valve (1), piping flange (3)
〉 and a part of the valve stem cylinder (5)
It is covered and insulated with a separate ring-shaped insulation bar (9). This heat insulating cover (9) is conventionally known and is
This is used in place of the insulation bar (7) that covers and covers the actuator (6) shown in the figure. However, in such a ring-shaped adiabatic force bar (9), the valve stem cylinder (
5) is only partially covered, and the rest of the valve stem (5) and actuator (6) are exposed to the outside air, so the temperature between the heat transferred from the flowing fluid and the outside air is high. Due to the difference, it was not possible to avoid condensation of water droplets on the exposed outer surface of the valve stem cylinder (5) and actuator (6). Therefore, the present invention covers the remaining part of the valve stem cylinder (5) that cannot be covered with the ring-shaped heat insulating force bar (9) with a cylindrical heat insulating cover (16), and In addition to isolating the outer peripheral surface from the atmosphere, a mounting plate (
The valve stem cylinder (5) and the actuator (6) are thermally isolated by inserting an insulating heat shield plate (17) between the valve stem cylinder (5) and the actuator (6). The above-mentioned heat insulating covers (4), (9), and (16) are preferably formed from a foam molded product such as polyurethane, polypropylene, polyethylene, polystyrene, etc. Such materials have excellent heat insulating performance, are lightweight, and are easy to cut, etc. Easy to cut and shape.
また、熱遮断板（１７）は前記発泡材料で形成しても良
いが、アクチュエータ（６）の取付けに伴う締付力が負
荷され、変形するので、塩化ビニールシ一ト又は石綿板
等が好しいであろう．
断熱カバー（４ ）（９ ）は直径方向に２つ割りの形
状に形成され、配管パイプ（２）やバタフライ弁（１）
の半径方向側方から被嵌され、粘着テープを巻き付けた
り、或は接合面に塗布した接着剤による接着等の適宜の
手段で接合される．
弁軸筒（５）の残部を被覆する筒状の断熱カバー（１６
）は、内周面を弁軸筒（５）の外周面と同一形状に型成
形され、一端を熱遮断板（１７）に接し、他端をリング
状断熱カバー（９）に接合するに充分な長さを有してい
る．又、該筒状断熱カバー（１６）は好しくは第２図に
示すように直径方向に２つ割り形状に形成されると共に
、少なくとも下部外面は好しくは断面方形に形成される
．２つ割りの筒状断熱つカバーク１６）は、弁軸筒〈５
〉にその半径方向側方から被着し、接合面を接着剤によ
る接着、若しくは粘着テープを巻き付け等の適宜の手段
で接合して、弁軸筒（５）の外周面に被覆させる．又、
下部外面（１６ａ）を断面正方形若しくは長方形の方形
に形戒することにより、第８図に示すように、リング状
断熱カバー（９）に、筒状断熱カバー（１６）の下部を
挿入して接合する際、リング状断熱力バー（９〉に形成
する接合口（１８）の形成が容易となる．すなわち、リ
ング状断熱カバー（９〉に接合口（１８）を形成する際
、形状が方形であれば、接合口（１８）が直線的である
ため、リング状断熱力バー〈９）をカッターナイフ等の
刃物で切断して接合口（１８）を容易に形成することが
可能となる．
第１０〜１２図は筒状断熱カバー（１６）の変形例、特
に弁軸筒への被着と接合とを容易にした例を示す、第１
０図の筒状断熱カバー（１６〉は、２つ割りにした断熱
カバー（１６〉の外周面に装飾のための薄いフィルム（
１９〉を被覆し、該フィルム（１９）の端部を延出して
、その内面に接着剤を塗布し、接合後フィルム（１９）
の延出片（１９ａ）で２つ割りした断熱カバー（１６〉
を接合するようにしたものである．第１１図は前記装飾
フィルム（１９）で２つ割りした断熱カバーを蝶番状に
連結し、且端部を前記第１０図と同様に延出し、その延
出片（１９ａ）の内面に接着剤を塗布したものである．
第１２図は筒状断熱カバー（１６）を２つ割りとするこ
となく、半径方向一方のみを切断して拡開自在とすると
共に、外周面を被覆する装飾フィルム（１９）の一端部
を前記と同様に延出して延出片（１９ａ）とし、該延出
片（１９ａ）の内面に接着剤を塗布したものである．（
作 用）
配管パイプ（２）、フランジ（３）並びにバタフライ弁
（１）の弁本体（１０）を断熱カバー（４ ）（９ ）
で被覆すると共に、弁軸筒（５〉の外端に熱遮断板（１
７）を介してアクチュエータ（６）を取り付け、弁本体
（１０）を被覆するリング状断熱力バー（９）と前記熱
遮断板（１７）との間．の弁軸筒外周面を半径方向側方
から被着される少なくとも半径方向の一方を長手方向に
切断した筒状断熱カバー（１６）で被覆し、該筒状断熱
力バー（１６〉の一端を前記弁本体を被覆するリング状
断熱力バー（９〉に接合し、他端を前記熱遮断板（１７
〉に接してあるので、弁軸筒（５〉が外気に露出される
ことがないと共に、アクチュエータ（６〉は熱遮断板（
１７）により弁軸筒（５）と熱的に遮断されているため
、弁軸筒（５）やアクチュエータに大気中の水滴が結露
して来ることがなくなる．（発明の効果）
この発明によれば、従来断熱被覆が困難なため露出され
たままになっていた弁軸筒外周面を断熱カバーできわめ
て容易且確実に被覆し、外気から遮断することが出来る
と共に、アクチュエータは弁軸筒と熱的に遮断されるた
め、弁軸筒やアクチュエータの外周面に大気中の水滴が
結露して来るおそれがなくなる．又弁軸筒やアクチュエ
ータから熱の放散がないため、エネルギーロスを防止す
ることも出来る．The heat shielding plate (17) may be formed of the foamed material, but since it will deform due to the clamping force applied when the actuator (6) is attached, it is preferable to use a vinyl chloride sheet or an asbestos plate. It would be nice. The heat insulating covers (4) (9) are formed into two halves in the diameter direction, and are designed to protect against plumbing pipes (2) and butterfly valves (1).
They are fitted from the sides in the radial direction and joined by any appropriate means, such as wrapping adhesive tape or adhering with adhesive applied to the joint surfaces. A cylindrical heat insulating cover (16) that covers the remainder of the valve stem cylinder (5)
) is molded so that its inner circumferential surface has the same shape as the outer circumferential surface of the valve stem cylinder (5), and has one end in contact with the heat shielding plate (17), and the other end is sufficient to be joined to the ring-shaped heat insulating cover (9). It has a length of Further, the cylindrical heat insulating cover (16) is preferably formed into two parts in the diameter direction as shown in FIG. 2, and at least the outer surface of the lower part is preferably formed to have a rectangular cross section. The two-part cylindrical heat insulating tube cover 16) is a valve stem tube <5
) from the sides in the radial direction, and the joint surfaces are joined by an appropriate means such as adhesion with adhesive or wrapping with adhesive tape to cover the outer circumferential surface of the valve stem cylinder (5). or,
By shaping the lower outer surface (16a) into a square or rectangular cross section, the lower part of the cylindrical heat insulating cover (16) can be inserted and joined to the ring-shaped heat insulating cover (9) as shown in Fig. 8. When forming the joint opening (18) on the ring-shaped insulation bar (9>), it becomes easier to form the joint opening (18) on the ring-shaped insulation cover (9>). If there is, since the joint opening (18) is straight, it becomes possible to easily form the joint opening (18) by cutting the ring-shaped heat insulating force bar <9) with a cutting tool such as a cutter knife. Figures 10 to 12 show modified examples of the cylindrical heat insulating cover (16), particularly examples that facilitate attachment and joining to the valve stem cylinder.
The cylindrical heat insulating cover (16) in Figure 0 is a thin film for decoration (
19>, the end of the film (19) is extended, an adhesive is applied to the inner surface, and after bonding, the film (19)
Heat insulation cover (16) divided into two by the extension piece (19a)
It is designed to join. Fig. 11 shows a heat insulating cover divided into two pieces connected in a hinge shape using the decorative film (19), and the end portions are extended in the same manner as in Fig. 10, and adhesive is applied to the inner surface of the extending piece (19a). It is coated with
Fig. 12 shows that the cylindrical heat insulating cover (16) is not divided into two, but only one side is cut in the radial direction so that it can be expanded freely, and one end of the decorative film (19) covering the outer peripheral surface is In the same manner as above, it is extended to form an extension piece (19a), and an adhesive is applied to the inner surface of the extension piece (19a). (
Function) Insulating covers (4) (9) for the piping pipe (2), flange (3), and valve body (10) of the butterfly valve (1).
At the same time, a heat shield plate (1) is placed on the outer end of the valve stem cylinder (5)
7) between the ring-shaped insulation bar (9) that covers the valve body (10) and the heat shield plate (17). The outer circumferential surface of the valve stem cylinder is covered with a cylindrical heat insulating cover (16) which is applied from the radial side and has at least one radial end cut in the longitudinal direction, and one end of the cylindrical heat insulating power bar (16) is It is joined to the ring-shaped heat insulation bar (9) that covers the valve body, and the other end is connected to the heat shield plate (17).
〉, the valve stem cylinder (5〉) is not exposed to the outside air, and the actuator (6〉) is in contact with the heat shield plate (
Since it is thermally isolated from the valve stem cylinder (5) by 17), water droplets in the atmosphere will not condense on the valve stem cylinder (5) or the actuator. (Effects of the Invention) According to the present invention, the outer circumferential surface of the valve stem cylinder, which was conventionally left exposed because it was difficult to cover it with heat insulation, can be covered with a heat insulation cover very easily and reliably, and can be isolated from the outside air. At the same time, since the actuator is thermally isolated from the valve stem cylinder, there is no risk of water droplets in the atmosphere condensing on the outer peripheral surface of the valve stem cylinder or actuator. Also, since no heat is dissipated from the valve stem or actuator, energy loss can be prevented.
第１図はこの発明に係るバタフライ弁の外観斜視図、第
２図は同分解斜視図、第３図は正面図、第４図は側面図
、第５図は第４図Ｖ−■線に沿った横断面図、第６図は
筒状断熱カバーの斜視図、第７図は同カバーの接合前の
状態を示す斜視図、第８、９図は筒状断熱カバーをリン
グ状断熱カバーの接合状態を示す斜視図、第１０．１１
、１２図は筒状断熱カバーの他の例を示す斜視図、第１
３図はこの発明により断熱被覆された状態を示す断面図
、第１４図は従来の断熱被覆状態の一例を示す断面図で
ある．
（１）・・・バタフライ弁 （２）・・・配管パイプ（
３）・・・フランジ （４〉・・・断熱カバー（５
）・・・弁軸筒 （６）・・・アクチュエータ（
７〉・・・断熱カバー （８）・・・締付ボルト・ナ
ット（９）・・・リング状断熱カバー
（ｌＯ）・・・弁本体 （１１）・・・流体通路
（１２）・・・弁 体
（１４）・・・弁 棒
（１６）・・・筒状断熱力
（１８）・・・接合口
（１３）・・・シートリング
（１５〉・・・取付板
バー（１７〉・・・熱遮断板
（１９）・・・装飾フイルムFig. 1 is an external perspective view of a butterfly valve according to the present invention, Fig. 2 is an exploded perspective view, Fig. 3 is a front view, Fig. 4 is a side view, and Fig. 5 is taken along the line V-■ in Fig. 4. Fig. 6 is a perspective view of the cylindrical heat insulating cover, Fig. 7 is a perspective view showing the cover before joining, and Figs. 8 and 9 show the cylindrical heat insulating cover attached to the ring-shaped heat insulating cover. Perspective view showing bonded state, No. 10.11
, 12 is a perspective view showing another example of the cylindrical heat insulating cover, the first
FIG. 3 is a sectional view showing a state in which a heat insulating coating is applied according to the present invention, and FIG. 14 is a sectional view showing an example of a state in which a conventional heat insulating coating is applied. (1)...Butterfly valve (2)...Plumbing pipe (
3)...Flange (4>...Insulation cover (5)
)...Valve stem cylinder (6)...Actuator (
7>...Heat insulation cover (8)...Tightening bolt/nut (9)...Ring-shaped heat insulation cover (lO)...Valve body (11)...Fluid passage (12)... Valve body (14)...Valve rod (16)...Cylindrical insulation (18)...Joint (13)...Seat ring (15>...Mounting plate bar (17>)・Heat shield plate (19)...decorative film
Claims (4)
を取り付けると共に、弁軸筒の外周面に、内周面を弁軸
筒の外周面形状に做つて成形した筒状の断熱カバーを被
着し、該筒状断熱カバーの一端を前記熱遮断板に接する
と共に、他端をバタフライ弁の弁本体外周面を断熱被覆
する断熱カバーに接合したことを特徴とするバタフライ
弁の防露装置。(1) The actuator is attached to the outer end of the valve stem cylinder via a heat shield plate, and a cylindrical heat insulating cover is formed on the outer circumferential surface of the valve stem cylinder with the inner circumferential surface shaped to the outer circumferential shape of the valve stem cylinder. , one end of the cylindrical heat insulating cover is in contact with the heat shielding plate, and the other end is joined to a heat insulating cover that heat-insulatingly covers the outer peripheral surface of the valve body of the butterfly valve. Device.
に形成されていることを特徴とする請求項（１）記載の
防露装置。(2) The dew prevention device according to claim (1), characterized in that the cylindrical heat insulating cover is formed into two parts in the diameter direction.
れ半径方向に拡開自在であることを特徴とする請求項（
１）記載の防露装置。(3) Claim characterized in that the cylindrical heat insulating cover is cut at one side in the diametrical direction and can be freely expanded in the radial direction (
1) The dew protection device described.
されていることを特徴とする請求項（１）（２）又は（
３）記載の防露装置。(4) Claims (1), (2) or (2) characterized in that the outer circumferential surface of one end of the cylindrical heat insulating cover is formed to have a rectangular cross section.
3) Dew protection device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1301520A JPH0678789B2 (en) | 1989-11-20 | 1989-11-20 | Dew-proof device for butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1301520A JPH0678789B2 (en) | 1989-11-20 | 1989-11-20 | Dew-proof device for butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03163286A true JPH03163286A (en) | 1991-07-15 |
| JPH0678789B2 JPH0678789B2 (en) | 1994-10-05 |
Family
ID=17897923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1301520A Expired - Lifetime JPH0678789B2 (en) | 1989-11-20 | 1989-11-20 | Dew-proof device for butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678789B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017506317A (en) * | 2014-02-21 | 2017-03-02 | ビーエスアンドビー イノベーション リミテッド | Rotating pressure relief valve assembly |
| KR20200086559A (en) * | 2019-01-09 | 2020-07-17 | 주식회사 솔브 | Valves to Prevent Axial Bending |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55157180U (en) * | 1979-04-25 | 1980-11-12 | ||
| JPS6224152U (en) * | 1985-07-29 | 1987-02-14 | ||
| JPS6443871A (en) * | 1987-08-12 | 1989-02-16 | Hitachi Ltd | Pcm signal recorder |
-
1989
- 1989-11-20 JP JP1301520A patent/JPH0678789B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55157180U (en) * | 1979-04-25 | 1980-11-12 | ||
| JPS6224152U (en) * | 1985-07-29 | 1987-02-14 | ||
| JPS6443871A (en) * | 1987-08-12 | 1989-02-16 | Hitachi Ltd | Pcm signal recorder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017506317A (en) * | 2014-02-21 | 2017-03-02 | ビーエスアンドビー イノベーション リミテッド | Rotating pressure relief valve assembly |
| KR20200086559A (en) * | 2019-01-09 | 2020-07-17 | 주식회사 솔브 | Valves to Prevent Axial Bending |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0678789B2 (en) | 1994-10-05 |
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