CA1162820A - Quick repair check valve - Google Patents
Quick repair check valveInfo
- Publication number
- CA1162820A CA1162820A CA000377559A CA377559A CA1162820A CA 1162820 A CA1162820 A CA 1162820A CA 000377559 A CA000377559 A CA 000377559A CA 377559 A CA377559 A CA 377559A CA 1162820 A CA1162820 A CA 1162820A
- Authority
- CA
- Canada
- Prior art keywords
- coupling
- valve seat
- flap
- flat annular
- 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.)
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
-
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
Abstract
ABSTRACT
Flow control devices, particularly heavy duty valve assemblies, in which the valve seat and the valve means can be replaced without dislocating the pipes leading to and away from the valve and which can easily be installed into an existing pipe line.
Flow control devices, particularly heavy duty valve assemblies, in which the valve seat and the valve means can be replaced without dislocating the pipes leading to and away from the valve and which can easily be installed into an existing pipe line.
Description
1~L6ZE~2~
This invention relates to flow control devices particularly to heavy duty valve assemblies in which the valve seat and the valve means, such as a flap or ball valve, can easily be replaced.
Flow control devices such as flap vàlve and`ball valve assemblies are well known in the art. However, they either are not well suited for heavy duty use such as, for example, for use in the oil fields, or their wearing parts cannot be repaired or replaced without moving or replacing a portion of the pipe in which the device is mounted.
This tends to make repairs difficult and costly and can give rise to excessive equipment down-time. Representative of the known devices of this type are those described in Canadian patents 38,790 and 822,459.
The present invention seeks to overcome these and other disadvantages of the known flow control devices.
It is an ob~ect of the present invention to provide flow control devices in which the valve seat and the valve means can be replaced without dislocating the pipes leading to and away from the valve.
It is a further object of this invention to provide flow control devices which have a housing which is easy to remove and insert in a pipeline and into which either a flap valve and seat, a ball valve and seat or other suitable flow control device can be removably inserted.
~62B~
It is a further object of the invention to provide heavy duty flow control devices which are easy to install into an existing pipe line.
The flow control device according to the pxesent invention comprises:
a) a pair of coupling sleeves;
b) a hollow body having an inlet and an outlet, said inlet and said outlet each abut~ing a respective one of said coupling sleeves;
c) a coupling means engageable with said body and said coupling sleeves so as to connect said body with said coupling sleeves, said coupling means being removable in directions away from said body so as to allow the body to be removed laterally without dislocation o~ the coupling sleeves as when the latter are connected in a pipe line;
d) a valve assembly including a valve seat removably disposed within said body, the valve assembly being adapted to control the passage of fluid through the axial flow passage of the body.
In a further aspect of the invention there is provided a check valve adapted to be installed in a pipeline of a given internal diameter comprising in combination:
a~ a pair of identical coupling sleeves each having an axial flow passage therethrough, the flow passage having an internal diameter substantially equal to the given diameter, one axial end of each of the coupling sleeves being threadably engageable with the end portion of a respective pipe and the opposite end of each of the coupling sleeves having a flat annular end surface;
b~ an integral generally tubular body having an axial flow passage therethrough in communication with an inlet and an outlet end, a coaxial counter bore being provided in the inlet end of the body, the counter bore extending from the inlet end to an annular radially in-wardly directed shoulder and having an internal diameter -2a-larger than the given diameter of the pipe, the inlet and outlet end each having a flat annular face thereon which is adapted to come ir.to close juxtaposition with the flat annular surface of a respective one of the coupling sleeves with the flow passages communicating with one another and being generally aligned;
c) valve means for controlling the passage of fluid through the axial flow passage of the body, the valve means including a generally annular valve seat having an internal diameter generally equal to the given diameter and a substantially circular flap connected to the valve seat, the valve seat and flap being slidingly disposed within the counter bore in the body and being axially removable from the inlet end of the body, the upstream end of the valve seat having a flat annular face thereon which, when the valve seat and flap are disposed within the body, is flush with the flat annular face of the inlet end of the body and the downstream end of the valve seat having a flat radial face thereon from the periphery of which extends an annular flange in axial direction, the annular flange abutting the annular shoulder in the body, the flap being provided with a hinge tangentially secured to its periphery, the hinge being received in a recess in the annular flange and cooperating with a transversely oriented hinge pin fixedly anchored in the annular flange to pivotally connect the flap to the downstream end of the valve seat for movement between a closed position in which the flap is sealingly received on the radial face and an open position in which the flap is extended downstream of the valve seat within the body, and the flap having a diameter larger than the given diameter such that, when the flap is dis-connected from the valve seat, the flap is prevented from entering the flow passage through the coupling sleeves and pipeline;
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-2b-d) a pair of coupling nuts for connecting the body with the coupling sleeves, each of the coupling nuts fitting over and being threadably engageable with a respec-tive oppos;te end portion of the body such that, when the coupling nuts are tightened, the nuts urge the flat annular end surface of one coupling sleeve axially into close juxtaposition with the flat annular faces on the inlet end of the body and on the valve seat and the flat annular end surface of the other coupling sleeve axially into close juxtaposition with the flat annular face on the outlet end of the body so as to effect sealing con-nection therebetween, and when the coupling nuts are loosened, the nuts are movable in directions away from the body so as to allow the body to be removed laterally from between the coupling sleeves without dislocation of the coupling sleeves as when the latter are connected in a pipeline;
the body being shaped that, in use, when the valve seat and flap are disposed within the body and the flap is in the open position, the diameter of the flow passage through the body is at least as great as the diameter of the flow passage through the coupling sleeve so as to provide substantially unobstructed fluid flow between the two coupling sleeves and to allow passage of pipeline cleaning implements through the body.
In a typical embodiment of the invention, the coupling sleeves are threaded over the ends of the pipe into which the valve is mounted. The body fits between the two coupling sleeves such that each end of the body is flush with the end of a respective one of the coupling sleeves. Inserted into the body from the inlet side is a suitable flow control means such as a flap valve and seat or a ball valve and seat. The valve seat is preferably situated such that it ends flush with the inlet side of the body and is engaged and held in position by an associated one of the coupling ~ ~., .~.
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-2c sleeves. The coupling means comprise a pair of coupling nuts each of which has a flange engaging a shoulder on the respective coupling sleeve and is threaded over one end of the body, thus tightly connecting the body with the coupling sleeves.
1~ii2~
In a valve assembly the parts which usually wear out and need to be replaced first are the valve means and the valve seat. Valves with replaceable valve means such as replaceable flaps etc. are known. However, the valve seat is also sub]ect to excessive wear, particularly when placed in heavy duty lines, such as lines used for the transport of raw oil or the like. Consequently, it is important that not only the valve itself but also the valve seat can easily be replaced.
In the flow control device according to the present invention the valve means and valve seat can be repaired or exchanged without dislocating or replacing the pipes leading to and away from the valve assembly. To remove the valve seat and valve means the coupling nuts are un-screwed and slid away from the body to rest on the coupling sleeves. The body is then removed laterally from between the coupling sleeves. The dama~ed valve seat and valve means is removed from the body and replaced with a new set. The body is reinserted between the coupling sleeves and the coupling nuts are tightened.
The fact that valve seat and valve means are separate from the body of the valve assembly have the urther advantage that these parts can be made of expensive wear resistant material without the necessity of having to make the whole body or flow control device of the same expensive material.
The flow control device according to the invention can also be installed into an existing pipe line, should the need arise. For this purpose a piece is cut out of the pipe, the pipe ends are threaded, a coupling nut is slid over each of the pipe ends, the coupling sleeves are screwed to the pipe ends, the body with the appropriate valve means ancl seat is inserted and the coupling nuts screwed onto the ends of the body.
B:~3 The flap valve assembly according to the invention may be constructed so that when the flap is pushed open by fluid entering from the inlet side of the body the cross-section of free flow within the flow control device is nowhere smaller than the cross-section of the pipe line.
In this way friction and turbulence within the flow control device are kept to a minimum. This also allows the unrestricted passage of cleaning implements, such as a rubber ball or the like, through the flow control device.
These balls are pushed through the line under pressure to remove deposits in the line. Such balls, also called "pigs", are frequently used in oil lines to clear the lines from wax deposits and the like.
The present invention will now be described in more detail with reference to the accompanying drawings which illustrate, by way of example, several embodiments of the invention, and in which:
Figure 1 is a perspective view of a valve assembly according to the invention;
Figure 2 is an exploded view of an embodiment of a flap valve assembly according to the invention;
Figure 3 is a schematic longitudinal cross-sectional view of the embodiment shown in Figure 2;
Figure 4 is a schematic longitudinal cross-sectional view of an embodiment of a ball valve assembly according to the invention.
Referring to Figure 1 valve assembly 1 comprises a pair of couplins sleeves 10, a pair of coupling nuts 15 and a hollow body 20. Body 20 can hold a flap valve assembly (shown in Figures 2 and 3) a ball valve assembly (shown in Figure 4) or another suitable valve assembly. Coupling sleeves 10, coupling nuts 15 and body 20 have an annular cross-section.
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Coupling sleeves 10 are each provided with an interior thread 11 so as to enable them to fit over and engage with respective threaded pipe ends ~shown in dashed lines in Fig. 3). At the end which faces body 20 each coupling sleeve 10 has a flat annular end surface 12 with an annular groove to hold sealing O-ring 13. The outside of each coupling sleeve 10 is provided with an annular shoulder 14 disposed immediately adjacent end surface 12.
The internal diameter of body 20 is largest at the inlet side. About one quarter way through the length of body 20 in the axial direction (as defined by the flow passage through the body) there is an annular shoulder 21 extending radially inwardly. This shoulder 21 serves as seat for valve seats 41 (Fig. 3) or 51 (Fig. 4). Shoulder 21 has a small recess 22 to provide clearance for the hinge of the flap valve. About halfway through body 20 the diameter of the flow passage becomes progressively smaller until it is, at the outlet end, the same as the interior diameter of the coupling sleeves and the pipe.
The body 20 is provided at its outlet end with a flat end face 20a which will be referred to hereinafter. At both ends body 20 is provided with exterior thr~ads 23. Threads 23 are preferably of the same hand to facilitate tightening of coupling nuts 15 thereon.
Coupling nuts 15 are each provided with a thread 16 on the inside thereof. ~ach of the threads16 cooperates with one of the threads 23. The interior diameter of coupling nuts 15 is large enough to allow the coupling nuts to be slid over coupling sleeves 10. At the end which is remote from body 20 each coupling nut 15 is provided with an annular flange 17 which,in use, abuts against a respective one of the shoulders 14 of each coupling sleeve 10 as shown in Figures 3 and 4. Thus, when the coupling nuts 15 are ti~htened, the coupling sleeves are drawn axially toward the opposing ends of body 20.
.
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The flap valve assembly 2 shown in Figures 2 and 3 further comprises an annular valve seat 41 which seats in a bore 41a in the end o~ body 20 against the shoulder 21. A groove holding an o-ring 42 is provided in the peripheral surface of valve seat 41 to prevent leakage of fluid between seat 41 and bore 41a. Valve seat 41 also includes an annular flange 48 wllich extends in the a~ial direction to make contact with the shoulder 21 whereby to axially locate the seat 41. A groove in radial surface 44 of valve seat 41 holds O-ring 43. A flap 45 is hingedly mounted to flange 48. Hinge 46 is integral with flap 45 and hinge pin 47 is anchored in flange 48. Flap 45 has a diameter larger than the diameter of the central aperture defined by the annular valve seat 41. When flap 45 is in the closed position O-ring 43 provides the seal between the flat sealing face of flap 45 and valve seat 41.
It will be noted that the outer annular face 41b is substantially flush with the associated end of body 20.
Hence when body 20 is moved laterally into position and coupling nuts 15 are tightened, the associated coupling sleeve comes into sealing contact with the valve seat 41 and also secures it in place. No additional means are required to secure the valve seat 41 in position and the latter can be easily removed from body 20 for repair or replacement.
The ball valve assembly 3 shown in Figure 4 comprises in addition to coupling sleeves 10, coupling - nuts 15 and body 20,an annular ball seat 51 with groove and O-ring 52, a ball 55, a spring 56 resiliently biasing ball 55 against ball seat 51, and a cage 60 containing ball 55 when the valve is in the open position.
The valve assembly 1 is installed by sliding coupling nuts 15 over the pipe ends and screwing coupling sleeves 10 onto the threaded parts of the pipe ends. Following this flap 45 and valve seat 41 are inserted into body 20 from the inlet side. O-ring 42 provides a tight seal between the ~Z~2~
valve seat and the body. Valve seat 41 with flap 45 are placed such that flange 48 abuts shoulder 21 and the center of hinge 47 coincides with recess 22 in shoulder 21. Body 20 containing the valve assembly is inserted between the two coupling sleeves 10 such that the valve opens under normal flow conditions and closes when the direction of flow is interrupted or reversed. Coupling nuts 15 are screwed onto body 20 until their flanges 17 abut the shoulders and press coupling sleeves 10 against body 20 and O-rings 13 against flat outer face 41b of valve seat 41 and the flat annular outlet end face 20a of body 20, respectively. In this way tight seals between body 20 and coupling sleeves 10 are established.
In place of flap 45 and valve seat 41 cage 60, spring 56, ball 55 and ball seat 51 can be inserted from the inlet side into body 20.
In operation, fluid flowing in the direction of arrow 5 enters the flow control device. In valve assembly
This invention relates to flow control devices particularly to heavy duty valve assemblies in which the valve seat and the valve means, such as a flap or ball valve, can easily be replaced.
Flow control devices such as flap vàlve and`ball valve assemblies are well known in the art. However, they either are not well suited for heavy duty use such as, for example, for use in the oil fields, or their wearing parts cannot be repaired or replaced without moving or replacing a portion of the pipe in which the device is mounted.
This tends to make repairs difficult and costly and can give rise to excessive equipment down-time. Representative of the known devices of this type are those described in Canadian patents 38,790 and 822,459.
The present invention seeks to overcome these and other disadvantages of the known flow control devices.
It is an ob~ect of the present invention to provide flow control devices in which the valve seat and the valve means can be replaced without dislocating the pipes leading to and away from the valve.
It is a further object of this invention to provide flow control devices which have a housing which is easy to remove and insert in a pipeline and into which either a flap valve and seat, a ball valve and seat or other suitable flow control device can be removably inserted.
~62B~
It is a further object of the invention to provide heavy duty flow control devices which are easy to install into an existing pipe line.
The flow control device according to the pxesent invention comprises:
a) a pair of coupling sleeves;
b) a hollow body having an inlet and an outlet, said inlet and said outlet each abut~ing a respective one of said coupling sleeves;
c) a coupling means engageable with said body and said coupling sleeves so as to connect said body with said coupling sleeves, said coupling means being removable in directions away from said body so as to allow the body to be removed laterally without dislocation o~ the coupling sleeves as when the latter are connected in a pipe line;
d) a valve assembly including a valve seat removably disposed within said body, the valve assembly being adapted to control the passage of fluid through the axial flow passage of the body.
In a further aspect of the invention there is provided a check valve adapted to be installed in a pipeline of a given internal diameter comprising in combination:
a~ a pair of identical coupling sleeves each having an axial flow passage therethrough, the flow passage having an internal diameter substantially equal to the given diameter, one axial end of each of the coupling sleeves being threadably engageable with the end portion of a respective pipe and the opposite end of each of the coupling sleeves having a flat annular end surface;
b~ an integral generally tubular body having an axial flow passage therethrough in communication with an inlet and an outlet end, a coaxial counter bore being provided in the inlet end of the body, the counter bore extending from the inlet end to an annular radially in-wardly directed shoulder and having an internal diameter -2a-larger than the given diameter of the pipe, the inlet and outlet end each having a flat annular face thereon which is adapted to come ir.to close juxtaposition with the flat annular surface of a respective one of the coupling sleeves with the flow passages communicating with one another and being generally aligned;
c) valve means for controlling the passage of fluid through the axial flow passage of the body, the valve means including a generally annular valve seat having an internal diameter generally equal to the given diameter and a substantially circular flap connected to the valve seat, the valve seat and flap being slidingly disposed within the counter bore in the body and being axially removable from the inlet end of the body, the upstream end of the valve seat having a flat annular face thereon which, when the valve seat and flap are disposed within the body, is flush with the flat annular face of the inlet end of the body and the downstream end of the valve seat having a flat radial face thereon from the periphery of which extends an annular flange in axial direction, the annular flange abutting the annular shoulder in the body, the flap being provided with a hinge tangentially secured to its periphery, the hinge being received in a recess in the annular flange and cooperating with a transversely oriented hinge pin fixedly anchored in the annular flange to pivotally connect the flap to the downstream end of the valve seat for movement between a closed position in which the flap is sealingly received on the radial face and an open position in which the flap is extended downstream of the valve seat within the body, and the flap having a diameter larger than the given diameter such that, when the flap is dis-connected from the valve seat, the flap is prevented from entering the flow passage through the coupling sleeves and pipeline;
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-2b-d) a pair of coupling nuts for connecting the body with the coupling sleeves, each of the coupling nuts fitting over and being threadably engageable with a respec-tive oppos;te end portion of the body such that, when the coupling nuts are tightened, the nuts urge the flat annular end surface of one coupling sleeve axially into close juxtaposition with the flat annular faces on the inlet end of the body and on the valve seat and the flat annular end surface of the other coupling sleeve axially into close juxtaposition with the flat annular face on the outlet end of the body so as to effect sealing con-nection therebetween, and when the coupling nuts are loosened, the nuts are movable in directions away from the body so as to allow the body to be removed laterally from between the coupling sleeves without dislocation of the coupling sleeves as when the latter are connected in a pipeline;
the body being shaped that, in use, when the valve seat and flap are disposed within the body and the flap is in the open position, the diameter of the flow passage through the body is at least as great as the diameter of the flow passage through the coupling sleeve so as to provide substantially unobstructed fluid flow between the two coupling sleeves and to allow passage of pipeline cleaning implements through the body.
In a typical embodiment of the invention, the coupling sleeves are threaded over the ends of the pipe into which the valve is mounted. The body fits between the two coupling sleeves such that each end of the body is flush with the end of a respective one of the coupling sleeves. Inserted into the body from the inlet side is a suitable flow control means such as a flap valve and seat or a ball valve and seat. The valve seat is preferably situated such that it ends flush with the inlet side of the body and is engaged and held in position by an associated one of the coupling ~ ~., .~.
~L6~2~
-2c sleeves. The coupling means comprise a pair of coupling nuts each of which has a flange engaging a shoulder on the respective coupling sleeve and is threaded over one end of the body, thus tightly connecting the body with the coupling sleeves.
1~ii2~
In a valve assembly the parts which usually wear out and need to be replaced first are the valve means and the valve seat. Valves with replaceable valve means such as replaceable flaps etc. are known. However, the valve seat is also sub]ect to excessive wear, particularly when placed in heavy duty lines, such as lines used for the transport of raw oil or the like. Consequently, it is important that not only the valve itself but also the valve seat can easily be replaced.
In the flow control device according to the present invention the valve means and valve seat can be repaired or exchanged without dislocating or replacing the pipes leading to and away from the valve assembly. To remove the valve seat and valve means the coupling nuts are un-screwed and slid away from the body to rest on the coupling sleeves. The body is then removed laterally from between the coupling sleeves. The dama~ed valve seat and valve means is removed from the body and replaced with a new set. The body is reinserted between the coupling sleeves and the coupling nuts are tightened.
The fact that valve seat and valve means are separate from the body of the valve assembly have the urther advantage that these parts can be made of expensive wear resistant material without the necessity of having to make the whole body or flow control device of the same expensive material.
The flow control device according to the invention can also be installed into an existing pipe line, should the need arise. For this purpose a piece is cut out of the pipe, the pipe ends are threaded, a coupling nut is slid over each of the pipe ends, the coupling sleeves are screwed to the pipe ends, the body with the appropriate valve means ancl seat is inserted and the coupling nuts screwed onto the ends of the body.
B:~3 The flap valve assembly according to the invention may be constructed so that when the flap is pushed open by fluid entering from the inlet side of the body the cross-section of free flow within the flow control device is nowhere smaller than the cross-section of the pipe line.
In this way friction and turbulence within the flow control device are kept to a minimum. This also allows the unrestricted passage of cleaning implements, such as a rubber ball or the like, through the flow control device.
These balls are pushed through the line under pressure to remove deposits in the line. Such balls, also called "pigs", are frequently used in oil lines to clear the lines from wax deposits and the like.
The present invention will now be described in more detail with reference to the accompanying drawings which illustrate, by way of example, several embodiments of the invention, and in which:
Figure 1 is a perspective view of a valve assembly according to the invention;
Figure 2 is an exploded view of an embodiment of a flap valve assembly according to the invention;
Figure 3 is a schematic longitudinal cross-sectional view of the embodiment shown in Figure 2;
Figure 4 is a schematic longitudinal cross-sectional view of an embodiment of a ball valve assembly according to the invention.
Referring to Figure 1 valve assembly 1 comprises a pair of couplins sleeves 10, a pair of coupling nuts 15 and a hollow body 20. Body 20 can hold a flap valve assembly (shown in Figures 2 and 3) a ball valve assembly (shown in Figure 4) or another suitable valve assembly. Coupling sleeves 10, coupling nuts 15 and body 20 have an annular cross-section.
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Coupling sleeves 10 are each provided with an interior thread 11 so as to enable them to fit over and engage with respective threaded pipe ends ~shown in dashed lines in Fig. 3). At the end which faces body 20 each coupling sleeve 10 has a flat annular end surface 12 with an annular groove to hold sealing O-ring 13. The outside of each coupling sleeve 10 is provided with an annular shoulder 14 disposed immediately adjacent end surface 12.
The internal diameter of body 20 is largest at the inlet side. About one quarter way through the length of body 20 in the axial direction (as defined by the flow passage through the body) there is an annular shoulder 21 extending radially inwardly. This shoulder 21 serves as seat for valve seats 41 (Fig. 3) or 51 (Fig. 4). Shoulder 21 has a small recess 22 to provide clearance for the hinge of the flap valve. About halfway through body 20 the diameter of the flow passage becomes progressively smaller until it is, at the outlet end, the same as the interior diameter of the coupling sleeves and the pipe.
The body 20 is provided at its outlet end with a flat end face 20a which will be referred to hereinafter. At both ends body 20 is provided with exterior thr~ads 23. Threads 23 are preferably of the same hand to facilitate tightening of coupling nuts 15 thereon.
Coupling nuts 15 are each provided with a thread 16 on the inside thereof. ~ach of the threads16 cooperates with one of the threads 23. The interior diameter of coupling nuts 15 is large enough to allow the coupling nuts to be slid over coupling sleeves 10. At the end which is remote from body 20 each coupling nut 15 is provided with an annular flange 17 which,in use, abuts against a respective one of the shoulders 14 of each coupling sleeve 10 as shown in Figures 3 and 4. Thus, when the coupling nuts 15 are ti~htened, the coupling sleeves are drawn axially toward the opposing ends of body 20.
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The flap valve assembly 2 shown in Figures 2 and 3 further comprises an annular valve seat 41 which seats in a bore 41a in the end o~ body 20 against the shoulder 21. A groove holding an o-ring 42 is provided in the peripheral surface of valve seat 41 to prevent leakage of fluid between seat 41 and bore 41a. Valve seat 41 also includes an annular flange 48 wllich extends in the a~ial direction to make contact with the shoulder 21 whereby to axially locate the seat 41. A groove in radial surface 44 of valve seat 41 holds O-ring 43. A flap 45 is hingedly mounted to flange 48. Hinge 46 is integral with flap 45 and hinge pin 47 is anchored in flange 48. Flap 45 has a diameter larger than the diameter of the central aperture defined by the annular valve seat 41. When flap 45 is in the closed position O-ring 43 provides the seal between the flat sealing face of flap 45 and valve seat 41.
It will be noted that the outer annular face 41b is substantially flush with the associated end of body 20.
Hence when body 20 is moved laterally into position and coupling nuts 15 are tightened, the associated coupling sleeve comes into sealing contact with the valve seat 41 and also secures it in place. No additional means are required to secure the valve seat 41 in position and the latter can be easily removed from body 20 for repair or replacement.
The ball valve assembly 3 shown in Figure 4 comprises in addition to coupling sleeves 10, coupling - nuts 15 and body 20,an annular ball seat 51 with groove and O-ring 52, a ball 55, a spring 56 resiliently biasing ball 55 against ball seat 51, and a cage 60 containing ball 55 when the valve is in the open position.
The valve assembly 1 is installed by sliding coupling nuts 15 over the pipe ends and screwing coupling sleeves 10 onto the threaded parts of the pipe ends. Following this flap 45 and valve seat 41 are inserted into body 20 from the inlet side. O-ring 42 provides a tight seal between the ~Z~2~
valve seat and the body. Valve seat 41 with flap 45 are placed such that flange 48 abuts shoulder 21 and the center of hinge 47 coincides with recess 22 in shoulder 21. Body 20 containing the valve assembly is inserted between the two coupling sleeves 10 such that the valve opens under normal flow conditions and closes when the direction of flow is interrupted or reversed. Coupling nuts 15 are screwed onto body 20 until their flanges 17 abut the shoulders and press coupling sleeves 10 against body 20 and O-rings 13 against flat outer face 41b of valve seat 41 and the flat annular outlet end face 20a of body 20, respectively. In this way tight seals between body 20 and coupling sleeves 10 are established.
In place of flap 45 and valve seat 41 cage 60, spring 56, ball 55 and ball seat 51 can be inserted from the inlet side into body 20.
In operation, fluid flowing in the direction of arrow 5 enters the flow control device. In valve assembly
2 flap 45 opens and is pressed against the top of the interior surface of body 20. In this way the diameter of free flow 8 is nowhere smaller than the diameter of the pipe. In valve assembly 3 ball 55 is pushed away from ball seat 51 allowing the fluid to pass through cage 60.
In valve assembly 2 interruption of the fluid flow allows the flap to shut and any flow in the reverse direction will press flap 45 against O-ring 43, thus preventing fluid from escaping. In valve assembly 3 interruption or reversal of the fluid flow removes any pressure on the ball from the inlet side of the body and allows spring 66 to pressball 55 ~ightly against ball seat 51.
The diameter of flap 45 in valve assembly 2 is larger than the diameter of the coupling sleeves and the pipe. Therefore, should the hinge break or the flap get otherwise disconnected, the flap cannot escape down the ~i~ZB2~
line and cause damage to other ~alves, but is trapped within the valve assemblyO
From the foregoing description further modifications and embodiments will be apparent to those skilled in the art and the embodiments disclosed are intended only to illustrate the invention without limiting -the scope thereof.
In valve assembly 2 interruption of the fluid flow allows the flap to shut and any flow in the reverse direction will press flap 45 against O-ring 43, thus preventing fluid from escaping. In valve assembly 3 interruption or reversal of the fluid flow removes any pressure on the ball from the inlet side of the body and allows spring 66 to pressball 55 ~ightly against ball seat 51.
The diameter of flap 45 in valve assembly 2 is larger than the diameter of the coupling sleeves and the pipe. Therefore, should the hinge break or the flap get otherwise disconnected, the flap cannot escape down the ~i~ZB2~
line and cause damage to other ~alves, but is trapped within the valve assemblyO
From the foregoing description further modifications and embodiments will be apparent to those skilled in the art and the embodiments disclosed are intended only to illustrate the invention without limiting -the scope thereof.
Claims (12)
1. A check valve adapted to be installed in an oil pipeline comprising in combination:
a) a pair of coupling sleeves each having an axial flow passage therethrough;
b) a hollow body having an axial flow passage therethrough in communication with an inlet end and an outlet end, said inlet end and said outlet end each abutting a respective one of said coupling sleeves with said flow passages communicating with one another and being generally aligned;
c) coupling means for connecting said body with said coupling sleeves, said coupling means being removable in directions away from said body so as to allow the body to be removed laterally without dislocation of the coupling sleeves as when the latter are connected in a pipe line;
d) a valve assembly adapted to control the passage of fluid through the axial flow passage of the body, said valve assembly including a valve seat and a circular flap, said valve seat and flap being disposed within said body and axially removable from one of said ends thereof, said flap being pivotally connected to the valve seat for movement between a closed position and an open position in which said flap is extended downstream of said valve seat within said body, so that in use, when the valve assembly is in the open position, the cross section of the flow passage through said body is at least as great as the cross section of the flow passage through said coupling sleeves so as to provide substantially unobstructed fluid flow between the two coupling sleeves and to allow passage of pipe line cleaning implements through said body.
a) a pair of coupling sleeves each having an axial flow passage therethrough;
b) a hollow body having an axial flow passage therethrough in communication with an inlet end and an outlet end, said inlet end and said outlet end each abutting a respective one of said coupling sleeves with said flow passages communicating with one another and being generally aligned;
c) coupling means for connecting said body with said coupling sleeves, said coupling means being removable in directions away from said body so as to allow the body to be removed laterally without dislocation of the coupling sleeves as when the latter are connected in a pipe line;
d) a valve assembly adapted to control the passage of fluid through the axial flow passage of the body, said valve assembly including a valve seat and a circular flap, said valve seat and flap being disposed within said body and axially removable from one of said ends thereof, said flap being pivotally connected to the valve seat for movement between a closed position and an open position in which said flap is extended downstream of said valve seat within said body, so that in use, when the valve assembly is in the open position, the cross section of the flow passage through said body is at least as great as the cross section of the flow passage through said coupling sleeves so as to provide substantially unobstructed fluid flow between the two coupling sleeves and to allow passage of pipe line cleaning implements through said body.
2. The check valve of claim 1 wherein each of said coupling sleeves has a flat annular end surface which, when said coupling means connects said body and said coupling sleeves, is disposed in close juxtaposition to a respective end of said body.
3. The check valve of claim 2, wherein the inlet end and the outlet end of said body each has a flat annular face thereon and said removable valve seat has a flat annular face which, when the valve seat is disposed within the body, is generally flush with the flat annular face of the inlet end of said body such that, when said coupling means connects said body and said coupling sleeves, the flat annular end surface of one coupling sleeve comes into close juxtaposition with the flat annular faces on the inlet end and the valve seat and the flat annular end surface of the other coupling sleeve comes into close juxtaposition with the flat annular face on the outlet end.
4. The check valve of claim 1 wherein said coupling means comprises a pair of coupling nuts each threadably engageable with respective opposite end portions of said body and adapted, when tightened, to urge said coupling sleeves axially toward said opposite end portions of the body to effect connection therebetween.
5. The check valve of claim 4, wherein each of said coupling sleeves has a flat annular end surface which, when said coupling nuts are tightened, is disposed in close juxtaposition to a respective end of said body.
6. The check valve of claim 5 wherein the inlet end and the outlet end of said body each has a flat annular face thereon and said removable valve seat has a flat annular face which, when the valve seat is thus disposed within the body, is generally flush with the flat annular face of the inlet end of said body such that, when the coupling nuts are tightened, the flat annular end surface of one coupling sleeve comes into close juxtaposition with the flat annular faces on the inlet end and the valve seat and the flat annular end surface of the other coupling sleeve comes into close juxtaposition with the flat annular face on the outlet end.
7. The check valve of claim 1, 3 or 6 wherein said valve seat and flap are slidable outwardly of said inlet end of the body after the latter has been removed laterally from between said coupling sleeves.
8. The check valve of claim 3 or 6 wherein said valve seat and flap are slidable outwardly of said inlet end of the body after the latter has been removed laterally from between said coupling sleeves and which includes resilient sealing means between the juxtaposed flat annular surfaces and between said valve seat and the body to substantially prevent fluid leakage therebetween.
9. The check valve of claim 1, 3 or 6 wherein said valve seat and flap are slidable outwardly of said inlet end of the body after the latter has been removed laterally from between said coupling sleeves and wherein, in use, said valve seat is held in place within said body between an annular ledge provided in the body and the respective coupling sleeve.
10. The check valve of claim 1, 3 or 6 wherein said valve seat and flap are slidable outwardly of said inlet end of the body after the latter has been removed laterally from between said coupling sleeves and dimensions of said flap are such that, when disconnected from said valve seat, said flap is prevented from entering the flow passage through said coupling sleeves.
11. A check valve adapted to be installed in a :. .
pipeline of a given internal diameter comprising in combination:
a) a pair of identical coupling sleeves each having an axial flow passage therethrough, said flow passage having an internal diameter substantially equal to the given diameter, one axial end of each of said coupling sleeves being threadably engageable with the end portion of a respective pipe and the opposite end of each of said coupling sleeves having a flat annular end surface;
b) an integral generally tubular body having an axial flow passage therethrough in communication with an inlet and an outlet end, a coaxial counter bore being provided in the inlet end of said body, said counter bore extending from the inlet end to an annular radially inwardly directed shoulder and having an internal diameter larger than the given diameter of the pipe, said inlet end and said outlet end each having a flat annular face thereon which is adapted to come into close juxtaposition with the flat annular surface of a respective one of said coupling sleeves with said flow passages communicating with one another and being generally aligned;
c) valve means for controlling the passage of fluid through the axial flow passage of the body, said valve means including a generally annular valve seat having an internal diameter generally equal to the given diameter and a substantially circular flap connected to said valve seat, said valve seat and flap being slidingly disposed within said counter bore in said body and being axially removable from the inlet end of the body, the upstream end of said valve seat having a flat annular face thereon which, when the valve seat and flap (claim 11 cont'd) are disposed within said body, is flush with the flat annular face of the inlet end of said body and the downstream end of said valve seat having a flat radial face thereon from the periphery of which extends an annular flange in axial direction, said annular flange abutting said annular shoulder in said body, said flap being provided with a hinge tangentially secured to its periphery, said hinge being received in a recess in said annular flange and cooperating with a transversely oriented hinge pin fixedly anchored in said annular flange to pivotally connect said flap to said downstream end of said valve seat for movement between a closed position in which said flap is sealingly received on said radial face and an open position in which said flap is extended downstream of said valve seat within said body, and said flap having a diameter larger than the given diameter such that, when the flap is disconnected from said valve seat, said flap is prevented from entering the flow passage through said coupling sleeves and pipeline;
d) a pair of coupling nuts for connecting said body with said coupling sleeves, each of said coupling nuts fitting over and being threadably engageable with a respective opposite end portion of said body such that, when the coupling nuts are tightened, said nuts urge the flat annular end surface of one coupling sleeve axially into close juxtaposition with the flat annular faces on the inlet end of the body and on the valve seat and the flat annular end surface of the other coupling sleeve axially into close juxtaposition with the flat annular face on the outlet end of the body so as to effect sealing (claim 11 cont'd) connection therebetween, and, when the coupling nuts are loosened, said nuts are movable in directions away from said body so as to allow the body to be removed laterally from between said coupling sleeves without dislocation of the coupling sleeves as when the latter are connected in a pipeline;
said body being shaped that, in use, when the valve seat and flap are disposed within the body and the flap is in the open position, the diameter of the flow passage through said body is at least as great as the diameter of the flow passage through said coupling sleeve so as to provide substantially unobstructed fluid flow between the two coupling sleeves and to allow passage of pipeline cleaning implements through said body.
pipeline of a given internal diameter comprising in combination:
a) a pair of identical coupling sleeves each having an axial flow passage therethrough, said flow passage having an internal diameter substantially equal to the given diameter, one axial end of each of said coupling sleeves being threadably engageable with the end portion of a respective pipe and the opposite end of each of said coupling sleeves having a flat annular end surface;
b) an integral generally tubular body having an axial flow passage therethrough in communication with an inlet and an outlet end, a coaxial counter bore being provided in the inlet end of said body, said counter bore extending from the inlet end to an annular radially inwardly directed shoulder and having an internal diameter larger than the given diameter of the pipe, said inlet end and said outlet end each having a flat annular face thereon which is adapted to come into close juxtaposition with the flat annular surface of a respective one of said coupling sleeves with said flow passages communicating with one another and being generally aligned;
c) valve means for controlling the passage of fluid through the axial flow passage of the body, said valve means including a generally annular valve seat having an internal diameter generally equal to the given diameter and a substantially circular flap connected to said valve seat, said valve seat and flap being slidingly disposed within said counter bore in said body and being axially removable from the inlet end of the body, the upstream end of said valve seat having a flat annular face thereon which, when the valve seat and flap (claim 11 cont'd) are disposed within said body, is flush with the flat annular face of the inlet end of said body and the downstream end of said valve seat having a flat radial face thereon from the periphery of which extends an annular flange in axial direction, said annular flange abutting said annular shoulder in said body, said flap being provided with a hinge tangentially secured to its periphery, said hinge being received in a recess in said annular flange and cooperating with a transversely oriented hinge pin fixedly anchored in said annular flange to pivotally connect said flap to said downstream end of said valve seat for movement between a closed position in which said flap is sealingly received on said radial face and an open position in which said flap is extended downstream of said valve seat within said body, and said flap having a diameter larger than the given diameter such that, when the flap is disconnected from said valve seat, said flap is prevented from entering the flow passage through said coupling sleeves and pipeline;
d) a pair of coupling nuts for connecting said body with said coupling sleeves, each of said coupling nuts fitting over and being threadably engageable with a respective opposite end portion of said body such that, when the coupling nuts are tightened, said nuts urge the flat annular end surface of one coupling sleeve axially into close juxtaposition with the flat annular faces on the inlet end of the body and on the valve seat and the flat annular end surface of the other coupling sleeve axially into close juxtaposition with the flat annular face on the outlet end of the body so as to effect sealing (claim 11 cont'd) connection therebetween, and, when the coupling nuts are loosened, said nuts are movable in directions away from said body so as to allow the body to be removed laterally from between said coupling sleeves without dislocation of the coupling sleeves as when the latter are connected in a pipeline;
said body being shaped that, in use, when the valve seat and flap are disposed within the body and the flap is in the open position, the diameter of the flow passage through said body is at least as great as the diameter of the flow passage through said coupling sleeve so as to provide substantially unobstructed fluid flow between the two coupling sleeves and to allow passage of pipeline cleaning implements through said body.
12. The check valve of claim 11 which includes resilient sealing means between juxtaposed flat annular surfaces and between said valve seat and the body to substantially prevent fluid leakage therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000377559A CA1162820A (en) | 1981-05-14 | 1981-05-14 | Quick repair check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000377559A CA1162820A (en) | 1981-05-14 | 1981-05-14 | Quick repair check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1162820A true CA1162820A (en) | 1984-02-28 |
Family
ID=4119944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000377559A Expired CA1162820A (en) | 1981-05-14 | 1981-05-14 | Quick repair check valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1162820A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4809739A (en) * | 1987-03-09 | 1989-03-07 | Scaramucci John P | Check valve |
| US4809738A (en) * | 1987-03-09 | 1989-03-07 | Scaramucci John P | Swing check valve |
| US4872478A (en) * | 1987-03-09 | 1989-10-10 | Scaramucci John P | Swing check valve |
| US4872479A (en) * | 1987-03-09 | 1989-10-10 | Scaramucci John P | Swing check valve |
| US4872477A (en) * | 1987-03-09 | 1989-10-10 | Scaramucci John P | Swing check valve |
| WO2002025148A1 (en) * | 2000-09-21 | 2002-03-28 | Siemens Aktiengesellschaft | Pressure-limiting valve |
| DE102016202709B3 (en) * | 2016-02-22 | 2017-03-09 | Magna Powertrain Bad Homburg GmbH | Valve seat to protect the housing |
-
1981
- 1981-05-14 CA CA000377559A patent/CA1162820A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4809739A (en) * | 1987-03-09 | 1989-03-07 | Scaramucci John P | Check valve |
| US4809738A (en) * | 1987-03-09 | 1989-03-07 | Scaramucci John P | Swing check valve |
| US4872478A (en) * | 1987-03-09 | 1989-10-10 | Scaramucci John P | Swing check valve |
| US4872479A (en) * | 1987-03-09 | 1989-10-10 | Scaramucci John P | Swing check valve |
| US4872477A (en) * | 1987-03-09 | 1989-10-10 | Scaramucci John P | Swing check valve |
| WO2002025148A1 (en) * | 2000-09-21 | 2002-03-28 | Siemens Aktiengesellschaft | Pressure-limiting valve |
| DE102016202709B3 (en) * | 2016-02-22 | 2017-03-09 | Magna Powertrain Bad Homburg GmbH | Valve seat to protect the housing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |