CA1193588A - Ball valve - Google Patents
Ball valveInfo
- Publication number
- CA1193588A CA1193588A CA000407552A CA407552A CA1193588A CA 1193588 A CA1193588 A CA 1193588A CA 000407552 A CA000407552 A CA 000407552A CA 407552 A CA407552 A CA 407552A CA 1193588 A CA1193588 A CA 1193588A
- Authority
- CA
- Canada
- Prior art keywords
- ball
- valve
- coil spring
- annular
- valve body
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- External Artificial Organs (AREA)
Abstract
A BALL VALVE
ABSTRACT OF THE DISCLOSURE
A ball valve wherein a ball is pivotally mounted to a valve body via a stem in contact with annular valve seats arranged between the ball and the valve body. An inclined coil spring whose loops are inclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, and which is elastically distorted without changing its entire length when it is compressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, is fitted in each annular space between the valve body and the annular valve seat in the distorted form so as to bias the annular valve seat onto the ball.
ABSTRACT OF THE DISCLOSURE
A ball valve wherein a ball is pivotally mounted to a valve body via a stem in contact with annular valve seats arranged between the ball and the valve body. An inclined coil spring whose loops are inclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, and which is elastically distorted without changing its entire length when it is compressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, is fitted in each annular space between the valve body and the annular valve seat in the distorted form so as to bias the annular valve seat onto the ball.
Description
1~358~
BACKGROUND OF THE INVENTION
This invention relates to an improvement of a ball valve.
In a conventional ball valve, a valve seat is pushed to contact with a ball by a seat retainer which retains the valve seat and is biased by an annular plate spring or a plurality of coil springs (ten or scores number) to push the valve seat to the ball, which are arranged between the seat retainer and a valve body at a certain interval around the periphery of the seat retainer, and one ends of which are inserted in holes formed in the inner surface of the valve body.
However, when the plate spring is used, it is difficult to manu~acture them, and since the processing cost is high, the manufacturing cost becomes very high especially when a . high-grade or costly material is used. Further, different sizes of such members are required depending on diameter sizes of the ball valve. When the coil springs are used, it is diEficult to manufacture the valve body, and a plurality of coil springs are required. Further, their assembling operation requires a lot oE time and trouble, and thus high cost.
SUMM~Y OF T~IE INVENTION
i It is an object of the present invention to provide a ball valve free from the aforementioned disadvantages, which is compact and simple in construction, and which is capable of being manufactured at low cost.
According to the present iven-tion there is provided a ball valve wherein a ball is pivotally mounted to a valve body via a stem in contact with annular valve seats arranged between the ball and the valve body, the improvement comprising inclined coil springs, loops of each being inclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, and each being elastically ; distorted without changing its entire length when it is com-pressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, which are fitted in annular spaces between the valve body and the annular valve seats in the distor-ted forms so as to bias the annular valve seats onto the ball.
BRIEF DESCRIPTION OF DRAWI~GS
In order that the present invention may be better understood a preferred embodiment thereof will be described with reEerence to the accompanying drawings, in which:
~'ig. 1 is a central longitudinal cross-section of one embodiment of a ball valve according to the present invention;
E'ig. 2 is an enlarged view of the part A of Fig. l; and 9 ~5~ 51 Fig. 3 is an extension view, seen along the line III - III of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENT
. ~
Referring to the drawings there is shown in Fig. l a ball valve according to the present invention.
.., A valve body l comprises a body cap la and a body member lb which are coupled by boLts 2. A ball 3 pivotally mounted to the body member lb via vertical stem 4.
A pair of seat retainers 5 are movably fitted in annular concaves 6 cut on the inner surface o the valve body in connection portions of left and right side parts of a valve chamber lc and left and right fluid paths ld and le of the valve body l.
i Each seat retainer 5 is provided with an annular groove 7 in its inner side, facing the ball 3, in which a valve seat 8 is fitted. A thin cylinder member 5a having the same coaxial diameter as the fluid paths ld and le is integrally connected to the outer end of the seat retainer 5, and extends outwards horizontally.
An inclined coil spring 9 comprises one coil spring ~ 5~
; whose loops are i.nclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, in a form of saw's teeth, as clearly shown in Fig. 3. There-fore, when it is compressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, it is elastically distorted .,.
or flattened wihtout changing its entire length, and its bias force depends on its length.
The inclined coil springs 9 having a proper length are fitted in an annular space 10 of the annular concave 6 which is surrounded by the valve body 1 and the seat retainer 5 so as to bias the valve seat 3 onto the ball 3. Spacers 11 are arranged between the ends of the inclined coil springs 9.
It is readily understood from the above description that, since the seat retainers 5 are biased by the inclined ~i coil springs 9 described above, the desired bias force can readily be obtained by varying the number of the inclined coi]. springs 9 and the sum of their lengths.
Therefore, the same kincl of inclined coil spring can be employed by properly cutting it for various ball valves having different diameters and seat retainer to be biased by the desired bias force depending on the different pressures of the fluid to be flown and the different materi.als of the ; valve seat.
5~38 Aceording to the present invention it is empirically found that two kinds of inelined coil springs having two different loop diameters fully cover the ball valves having the diameters of 5 - 50 eentimeter.
Sinee the inclined coil spring has a very strong elastic restitution foree, the inelined eoil spring can be made by a finer coil material than a usual coil spring and be manufactured easily at low eost even when the high-grade material is used.
Further, in this embodiment, the proeessing of the valve body is easy and the spaees oeeupied by the inelined coil springs are small enough to make a compact valve body, which means low manufaeturing eost.
Aeeording to the present invention one or a plurality r'~ of inelined eoil springs compose an annular form without using any spacer 11.
Although the present invention has been deseribed in some cletai.l by way of illustration and example for purposes of elarity oE understanding, it will, of eourse, be understood that various ehanges and modifications may be made in the form, details, and arrangements of the parts wlthout departing from the seope of the invention as set forth in the following elaims.
BACKGROUND OF THE INVENTION
This invention relates to an improvement of a ball valve.
In a conventional ball valve, a valve seat is pushed to contact with a ball by a seat retainer which retains the valve seat and is biased by an annular plate spring or a plurality of coil springs (ten or scores number) to push the valve seat to the ball, which are arranged between the seat retainer and a valve body at a certain interval around the periphery of the seat retainer, and one ends of which are inserted in holes formed in the inner surface of the valve body.
However, when the plate spring is used, it is difficult to manu~acture them, and since the processing cost is high, the manufacturing cost becomes very high especially when a . high-grade or costly material is used. Further, different sizes of such members are required depending on diameter sizes of the ball valve. When the coil springs are used, it is diEficult to manufacture the valve body, and a plurality of coil springs are required. Further, their assembling operation requires a lot oE time and trouble, and thus high cost.
SUMM~Y OF T~IE INVENTION
i It is an object of the present invention to provide a ball valve free from the aforementioned disadvantages, which is compact and simple in construction, and which is capable of being manufactured at low cost.
According to the present iven-tion there is provided a ball valve wherein a ball is pivotally mounted to a valve body via a stem in contact with annular valve seats arranged between the ball and the valve body, the improvement comprising inclined coil springs, loops of each being inclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, and each being elastically ; distorted without changing its entire length when it is com-pressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, which are fitted in annular spaces between the valve body and the annular valve seats in the distor-ted forms so as to bias the annular valve seats onto the ball.
BRIEF DESCRIPTION OF DRAWI~GS
In order that the present invention may be better understood a preferred embodiment thereof will be described with reEerence to the accompanying drawings, in which:
~'ig. 1 is a central longitudinal cross-section of one embodiment of a ball valve according to the present invention;
E'ig. 2 is an enlarged view of the part A of Fig. l; and 9 ~5~ 51 Fig. 3 is an extension view, seen along the line III - III of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENT
. ~
Referring to the drawings there is shown in Fig. l a ball valve according to the present invention.
.., A valve body l comprises a body cap la and a body member lb which are coupled by boLts 2. A ball 3 pivotally mounted to the body member lb via vertical stem 4.
A pair of seat retainers 5 are movably fitted in annular concaves 6 cut on the inner surface o the valve body in connection portions of left and right side parts of a valve chamber lc and left and right fluid paths ld and le of the valve body l.
i Each seat retainer 5 is provided with an annular groove 7 in its inner side, facing the ball 3, in which a valve seat 8 is fitted. A thin cylinder member 5a having the same coaxial diameter as the fluid paths ld and le is integrally connected to the outer end of the seat retainer 5, and extends outwards horizontally.
An inclined coil spring 9 comprises one coil spring ~ 5~
; whose loops are i.nclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, in a form of saw's teeth, as clearly shown in Fig. 3. There-fore, when it is compressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, it is elastically distorted .,.
or flattened wihtout changing its entire length, and its bias force depends on its length.
The inclined coil springs 9 having a proper length are fitted in an annular space 10 of the annular concave 6 which is surrounded by the valve body 1 and the seat retainer 5 so as to bias the valve seat 3 onto the ball 3. Spacers 11 are arranged between the ends of the inclined coil springs 9.
It is readily understood from the above description that, since the seat retainers 5 are biased by the inclined ~i coil springs 9 described above, the desired bias force can readily be obtained by varying the number of the inclined coi]. springs 9 and the sum of their lengths.
Therefore, the same kincl of inclined coil spring can be employed by properly cutting it for various ball valves having different diameters and seat retainer to be biased by the desired bias force depending on the different pressures of the fluid to be flown and the different materi.als of the ; valve seat.
5~38 Aceording to the present invention it is empirically found that two kinds of inelined coil springs having two different loop diameters fully cover the ball valves having the diameters of 5 - 50 eentimeter.
Sinee the inclined coil spring has a very strong elastic restitution foree, the inelined eoil spring can be made by a finer coil material than a usual coil spring and be manufactured easily at low eost even when the high-grade material is used.
Further, in this embodiment, the proeessing of the valve body is easy and the spaees oeeupied by the inelined coil springs are small enough to make a compact valve body, which means low manufaeturing eost.
Aeeording to the present invention one or a plurality r'~ of inelined eoil springs compose an annular form without using any spacer 11.
Although the present invention has been deseribed in some cletai.l by way of illustration and example for purposes of elarity oE understanding, it will, of eourse, be understood that various ehanges and modifications may be made in the form, details, and arrangements of the parts wlthout departing from the seope of the invention as set forth in the following elaims.
Claims (4)
1. A ball valve wherein a ball is pivotally mounted to a valve body via a stem in contact with annular valve seats arranged between the ball and the valve body, the improvement comprising inclined coil springs, loops of each being inclined to the same direction with respect to planes perpendicular to the central axis of the coil spring, and each being elastically compressed from its opposite longitudinal sides in the direction of the planes perpendicular to the central axis of the coil spring, which are fitted in annular spaces between the valve body and the annular valve seats in the distorted forms so as to bias the annular valve seats onto the ball.
2. A ball valve as defined in claim 1, wherein each inclined coil spring comprises a plurality of spring pieces divided.
3. A ball valve as defined in claim 1, wherein each inclined coil spring comprises one endless inclined coil spring.
4. A ball valve as defined in claims 1, 2 or 3, wherein each valve seat is biased into the ball via an annular seat retainer which retains the valve seat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56153287A JPS5854276A (en) | 1981-09-28 | 1981-09-28 | Ball valve |
| JP56-153287 | 1981-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1193588A true CA1193588A (en) | 1985-09-17 |
Family
ID=15559174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000407552A Expired CA1193588A (en) | 1981-09-28 | 1982-07-19 | Ball valve |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5854276A (en) |
| AU (1) | AU8840082A (en) |
| CA (1) | CA1193588A (en) |
| DE (1) | DE3205617A1 (en) |
| FR (1) | FR2513725A1 (en) |
| GB (1) | GB2107025B (en) |
| IT (2) | IT1140408B (en) |
| NO (1) | NO823256L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5288054A (en) * | 1993-06-28 | 1994-02-22 | M&Fc Holding Company, Inc. | Globe valve and method for making same |
| CN102705526A (en) * | 2012-07-02 | 2012-10-03 | 苏州道森阀门有限公司 | Self-adjusting valve seat type upper-mounted ball valve |
| CN103307302B (en) * | 2013-06-28 | 2016-04-13 | 苏州纽威阀门股份有限公司 | Dress formula low temperature floating ball valve in one |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1683697A (en) * | 1926-05-14 | 1928-09-11 | David P Rankin | Spirally-wound metallic belt |
| US1867723A (en) * | 1928-10-20 | 1932-07-19 | Troy Laundry Machinery Co | Convoluted spring |
| US2610846A (en) * | 1949-12-02 | 1952-09-16 | Hanna Engineering Works | Packing ring |
| US3166291A (en) * | 1962-04-25 | 1965-01-19 | M & J Engineering Co | Valve construction and method |
| US3445087A (en) * | 1966-09-30 | 1969-05-20 | Hills Mccanna Co | High pressure ball valve |
| US4111393A (en) * | 1977-07-20 | 1978-09-05 | Acf Industries, Incorporated | Ball valve seat assembly having a removably mounted face seal insert |
| DE2804429C3 (en) * | 1978-02-02 | 1980-09-04 | Goetze Ag, 5093 Burscheid | Sealing ring, especially an oil control piston ring |
| US4272057A (en) * | 1979-03-28 | 1981-06-09 | Delta Dynamics Corporation | Valve and fastener therefor |
-
1981
- 1981-09-28 JP JP56153287A patent/JPS5854276A/en active Pending
- 1981-11-27 GB GB08135830A patent/GB2107025B/en not_active Expired
- 1981-12-29 IT IT25888/81A patent/IT1140408B/en active
- 1981-12-29 IT IT8123922U patent/IT8123922V0/en unknown
-
1982
- 1982-02-12 FR FR8202332A patent/FR2513725A1/en active Granted
- 1982-02-17 DE DE19823205617 patent/DE3205617A1/en active Granted
- 1982-07-19 CA CA000407552A patent/CA1193588A/en not_active Expired
- 1982-09-15 AU AU88400/82A patent/AU8840082A/en not_active Abandoned
- 1982-09-27 NO NO823256A patent/NO823256L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU8840082A (en) | 1983-04-14 |
| DE3205617C2 (en) | 1988-11-17 |
| JPS5854276A (en) | 1983-03-31 |
| NO823256L (en) | 1983-03-29 |
| IT8123922V0 (en) | 1981-12-29 |
| DE3205617A1 (en) | 1983-04-21 |
| IT1140408B (en) | 1986-09-24 |
| GB2107025B (en) | 1985-08-14 |
| FR2513725A1 (en) | 1983-04-01 |
| IT8125888A0 (en) | 1981-12-29 |
| GB2107025A (en) | 1983-04-20 |
| FR2513725B1 (en) | 1984-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |