CA2054265A1 - Gate valve with two gate members - Google Patents
Gate valve with two gate membersInfo
- Publication number
- CA2054265A1 CA2054265A1 CA 2054265 CA2054265A CA2054265A1 CA 2054265 A1 CA2054265 A1 CA 2054265A1 CA 2054265 CA2054265 CA 2054265 CA 2054265 A CA2054265 A CA 2054265A CA 2054265 A1 CA2054265 A1 CA 2054265A1
- Authority
- CA
- Canada
- Prior art keywords
- gate
- gate member
- valve body
- wedge
- face
- 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.)
- Abandoned
Links
Landscapes
- Sliding Valves (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention generally relates to gate valves and, more particularly, but note by was of limitation, to a gate valve having two gate members with each gate member movable to an opened position and to a closed position.
The present invention generally relates to gate valves and, more particularly, but note by was of limitation, to a gate valve having two gate members with each gate member movable to an opened position and to a closed position.
Description
2~2fi3 Field of the Invention The present invention generally relates to gate valves and, more particularly, but not by way of limitation, to a gate valve having two gate members with each gate member movable to an opened position and to a closed position.
Brief DescriPtion of the Invention The present invention provides a gate valve comprising a valve body having an upper end, a lower end, an upstream end, a downstream end and a flow bore extending axially therethrough intersecting the upstream and the downstream ends thereof, a transverse bore being formed through a portion of the valve body extending about perpendicular to the flow bore and intersecting a portion of the flow bore; a first gate member movably disposed in a portion of the transverse bore generally near the upstream end of the valve body; a second gate member movably disposed in a portion of the transverse bore near the downstream end of the valve body; means connected to the first and the second gate members for moving the first and the second gate members to an opened position wherein the first and the second gate members are disposed in the transverse bore and withdrawn from the flow bore and for moving the first and the second gate members to a closed position wherein the first and the second gate members are disposed in the flow bore for interrupting the flow of fluid through the flow bore between the upstream and the downstream ends of the valve 2 ~ 3 ~
body; seal means for sealing the first gate member to the valve body near the upstream end of the valve body in the closed position of the first gate member: and seal means for sealing the second gate member to the valve body near the downstream end of the valve body in the closed position of the second gate member.
Brief Description of the Drawin~s Figure l is a sectional view taken transversely through a gate valve constructed in accordance with the present invention and showing the gate members in the closed position.
Figure 2 is a sectional view taken axially through the gate valve of Figure 1.
Figure 3 is a partial perspective view of the first gate member used in the gate valve of Figures 1 and 2.
Figure 4 is a partial perspective view of the second gate member used in the gate valve of Figures 1 and 2.
Description of the Preferred Embodiments Shown in Figures 1 and 2 is a gate valve 10 constructed in accordance with the present invention.
The gate valve 10 comprises a valve body 12 having an upper end 14 (Figure 2), a lower end 16, an upstream end 18 (Figure 2) and a downstream end 20 (Figure 2). A
flowbore 22 is formed through the valve body 12. The flowbore 22 extends through the valve body 12 intersecting the upstream end 18 and the downstream end 20.
It should be noted that, although the ends 18 and 20 have been labeled herein as upstream and downstream ends, the gate valve 10 particularly is adapted to accommodate 2o~2fi~
flow in either direction through the flowbore 22 and the terminology "upstream" and downstream" have been used herein merely for the purpose of identifying parts and are not intended to limit the gate valve 10 in any manner to a particular direction of flow through the gate valve 10 .
A transverse bore 24 is formed through the gate valve 10. The transverse bore 24 intersects the upper end 14 of the valve body 12 and extends a distance through the valve body 12 generally perpendicular to the flowbore 22. A lower end of the transverse bore 24 intersects the flowbore 22 at a position generally midway between the upstream end 18 and the downstream end 20 of the valve body 12.
A first gate member 26 (Figures 1, 2 and 3) is movably disposed in a portion of the transverse bore 24 generally near and spaced a distance from the upstream end 18 of the valve body 12. The first gate member 26 has an upstream face 28 and a downstream face 30. The first gate member 26 has an upper portion 32 (Figure 3) which is generally rectangularly shaped and a lower portion 34 (Figure 3) which is generally circular or semicircular shaped with the lower portion 34 extending a distance generally from a midportion of the upper portion 32. A curved edge 36 (Figures 2 and 3) is formed on the lower portion 34 with the curved edge 36 extending generally about the lower portion 34 and being disposed generally between the upstream and the downstream faces 28 and 30.
The first gate member 26 is coated with a corrosion protection coating. Seal member means 38 (Figures 2 and 3) is disposed on the curved edge 36 and the seal member means 38 extends generally over the entire curved edge 36. As shown in Figures 2 and 3, the seal member means 2~542~
38 more particularly comprises a pair of seal members 40 and 42. The seal member means 38 is positioned on the first gate member 26 to sealingly engage a portion of the valve body 12 formed by the flowbore 22 when the first gate member 26 is moved to the closed position.
A semicircular shaped face seal member 44 (Figures 2 and 3) is disposed on the upstream face 28 of the first gate member 26. The face seal member 44 extends in a semicircularly path generally over the upstream face 28 of the first gate member 26. Each end of the face seal member 44 is connected to the respective opposite ends of the seal member means 38 so that the seal member means 38 and the face seal member 44 cooperate to form a generally circularly shaped sealing surface. The face seal member 44 is positioned on the first gate member 26 to sealingly engage a portion of the valve body 12 formed by the transverse bore 22 so that the seal formed by the face seal member 44 and the valve body 12 is disposed generally out of the flowbore 22.
A first side wedge 43 (Figures 1 and 3) is formed on one side of the first gate member 26. The first gate side wedge 43 extends at about a forty-five degree angle.
A second side wedge 45 (Figures 1 and 3) is formed on one side of the first gate member 26, opposite the side having the first side wedge 43 formed thereon. The second side wedge 45 extends at about a forty-five degree angle. The first side wedge 43 is disposed about one hundred-eight degrees from the second side wedge 45.
A second gate member 46 (Figures 2 and 4) is movably disposed in a portion of the transverse bore 24 generally near and spaced a distance from the downstream end 20 of the valve body 12. The second gate member 46 has an upstream face 48 and a downstream face 50 (Figures 2 and 4). The second gate member 46 has an upper portion 52 2 ~ g ~
(Figure 4~ which is generally rectangularly shaped and a lower portion 54 (Figure 4) which is generally circular or semicircular shaped with the lower portion extending a distance generally from a midportion of the upper portion 52. A curved edge 56 (Figures 2 and 4) is formed on the lower portion 54 with the curved edge 56 extending generally about the lower portion 54 and being disposed generally between the upstream and the downstream faces 48 and 50.
The second gate member 46 is coated with a corrosion protection coating. Seal member means 58 (Figures 2 and 4) is disposed on the curved edge 56 and the seal member means 58 extends generally over the entire curved edge 56. As shown in Figures 2 and 4, the seal member means 58 more particularly comprises a pair of seal members 60 and 62. The seal member means 58 is po~itioned on the second gate member 46 to sealingly engage a portion of the valve body 12 formed by the flowbore 22 when the second gate member 46 is moved to the closed position.
A semicircularly shaped face seal member 64 (Figures 2 and 4) is disposed on the downstream face 50 of the second gate member 46. The face seal member 64 extends in a semicircularly path generally over the downstream face 50 of the second gate member 46. Each end of the face seal member 64 is connected to the respective opposite ends of the seal member means 58 so that the seal member means 58 and the face seal member 64 cooperate to form a generally circularly shaped sealing surface. The face seal member 64 is positioned on the second gate member 46 to sealingly engage a portion of the valve body 12 formed by the transverse bore 22 so that the seal formed by the face seal member 64 and the valve body 12 is disposed generally out of the flowbore 22.
2~26~
A first side wedge 63 (Figure 4) is formed on one side of the second gate member 46. The first side wedge 63 extends at about a forty-five degree angle.
A second side wedge 65 (Figure 4~ is formed on one side of the second gate member 46, opposite the side having the first side wedge 63 formed thereon. The`
second side wedge 65 extends at about a forty-five degree angle. The first side wedge 63 is disposed about one hundred eighty degrees from the second side wedge 65.
A first body wedge member 74 (Figures 1 and 2) is formed in a portion of the valve body 12. The first body wedge member 74 is positioned about midway between the upstream and downstream ends 18 and 20. The first body wedge member 74 has a pair of inclined surfaces 73 and 75 (Figure 2). The first body wedge member 74 is disposed in a position out of the flowbore 22.
A second body wedge member 76 (Figure 1) is formed in a portion of the valve body 12. The second body wedge member 76 is positioned about midway between the upstream and downstream ends 18 and 20. The second body wedge member 76 is disposed in the valve body 12 directly opposite the first body wedge member 74. The second body wedge member 76 is constructed exactly like the first body wedge member 74 and includes a pair of inclined surfaces (not shown). The second body wedge member 76 is disposed in a position out of the flowbore 22.
The first side wedge 43 on the gate member 26 is positioned to engage one of the inclined surfaces on the second body wedge member 76 when the first gate member 26 is moved from an opened to a closed position. The second side wedge 45 on the gate member 26 is positioned to engage the inclined surface 73 on the first body wedge member 74 as the first gate member 26 is moved from the opened to the closed position. The first side wedge 63 20~9~
on the second gate member 46 is positioned to engage one of the inclined surfaces on the second body wedge member 76 as the second gate member 46 is moved from the opened to the closed position. The second side wedge 65 on the second gate member 46 is positioned to engage the inclined surface 75 on the first body wedge member 74 as the second gate member 46 is moved to the opened to the closed position.
A slot 80 tFigures 1 and 3) is formed in the first gate member 26. The slot 80 more particularly is formed in the upper portion 32 of the first gate member 26 and disposed generally near an upper end of the first gate member 26.
A slot 82 (Figure 4) is formed in the second gate member 46. The slot 82 more particularly is formed in the upper portion 52 of the second gate member 46 and disposed generally near an upper end of th~ second gate member 46.
The slot 80 includes an inclined surface 84 (Figures 1 and 3) formed in the first gate member 26. The slot 82 includes an inclined surface 86 (Figure 4) formed in the second gate member 46. The purpose and function of the inclined surfaces 84 and 86 will be described in greater detail below.
A hub 88 (Figures 1 and 2) is disposed between the first and the second gate members 26 and 46. The hub 88 has a flange 90 (Figures 1 and 2) which extends circumferentially about the hub 88. The flange 90 has an inclined surface 92 (Figures 1 and 2) formed on a lower portion with the inclined surface 92 extending generally circumferentially about the hub 88. The portion of the flange 90 is disposed in the slot 80 formed in the first gate member 26 and another portion of the flange 90 is disposed in the slot 82 formed in the second gate member ~a~2~3 46. The hub 88 is positioned between the two gate members 26 and 46 so that a portion of the inclined surface 92 on the flange 90 engages and mates with the inclined surface 84 formed in the slot 80 and another portion of the inclined surface 92 on the flange 90 engages and mates with the inclined surface 86 formed in the slot 82.
The hub 88 has an upper end 94 and a lower end 96.
A threaded opening 98 is formed through the hub 88 intersecting upper and lower ends 94 and 96 of the hub 88.
A threaded rod 100 (Figures 1 and 2) having a lower end 102 and an upper end 104 is disposed in the transverse bore 24. The upper end 104 of the threaded rod 100 extends through the upper end 14 of the valve body 12. The lower end 102 of the threaded rod lO0 extends through the threaded opening 98 in the hub 88 and threadedly engages the hub 88 to threadedly connect the threaded rod 100 to the hub 88.
A flange 106 (Figures l and 2) is formed on the threaded rod lO0 generally near the upper end 104. The flange 106 engages a portion of the upper end 14 of the valve body 12 for cooperating to support the threaded rod 100 in the transverse bore 24. The upper end 104 of the threaded rod 100 extends a distance above and beyond the upper end 14 of the valve body 12 the upper end 102 of the threaded rod 100 is adapted to be rotated via hand operated mechanical device in either a direction 108 (Figure 1) or a direction 110 (Figure 1). It should be noted that the threaded rod 100 also can be rotated via a motor and gear arrangement or by ~ay of any other means for rotating a threaded rod 100 if desired in particular application of the gate valve 10.
In the opened position of the first and the second 20~26~
gate members 26 and 46, the first and the second gate members 26 and 46 each are disposed in the transverse bore 24 and each are removed from the flowbore 22 thereby allowing the flow of fluid from the upstream end 18 through the flowbore 22 and out the downstream end 20 or in the reverse direction. When it is desired to close`
the gate valve 10, the threaded rod 100 is rotated in the direction 108. As the threaded rod 100 is rotated in the direction 108, the threaded rod 100 threadingly engages the hub 98 thereby moving the hub 98 and the first and the second gate members 26 and 46 connected thereto in a downward direction 112 (Figure 1). As the threaded rod 100 is rotated in the direction 108, the first and the second gate members 26 and 46 are moved in the downward direction 112 to a position wherein the first side wedge 43 on the first gate member 26 engages the second body wedge member 76 and the second side wedge 45 on the first gate member 26 engages the first body wedge member 74.
Further, as the first and the second gate members 26 and 46 are moved in the downward direction 112, the first side wedge 63 on the second gate member 46 engages the first body wedge member 74 and the second side wedge 65 on the second gate member 46 engages the second body wedge member 76. As the first and the second gate members 26 and 46 continue to be moved in the downward direction 112, the engagement between the first side wedge 43 and the second body wedge member 76 and the engagement between the second side wedge 45 and the first body wedge member 74 causes the first gate member 26 to be moved in a direction 114 ~Figure 2) generally toward the upstream end 18 of the valve body 12. Further, the engagement between the first side wedge 63 and the first body wedge member 74 and the engagement between the second side wedge 65 and the second body wedge member 76 20~26~
causes the second gate member 46 to be moved in a direction 116 (Figure 2) generally toward the downstream end 20 of the valve body 12. As the first and the second gate members 26 and 46 are moved to the alosed position (Figure 2), the engagement between the first side wedge 43 and the second body wedge member 76 and the engagement between the second side wedge 45 and the first body wedge member 74 cause the first gate member 2~ to be moved ~n the direction 114 to a position wherein the face seal member 44 and the first gate member 26 sealingly engages a portion of the valve body 12 and the seal member means 38 engages a portion of the valve body 12 formed by the flowbore 22 thereby forming a circularly shaped seal so that the first gate 26 sealingly closes the flowbore 22.
Simultaneously, as the second gate member 46 is moved in the downward direction 112, the second gate member is moved in the direction 116 by the engagement between the first side wedge 63 and the first body wedge member 74 and the engagement between the second side wedge 65 and the second body wedge member 76 to a position wherein the face seal member 64 of the second gate member 46 sealingly engages a portion of the valve body 12 and the seal member means 58 sealingly engages a portion of the valve body 12 formed by the flowbore 22. The seal member means 58 and the face seal 64 cooperate to form a circularly shaped seal between the second gate member 46 and the valve body 12. The side wedge members 43, 45, 63 and 65 cooperate with the first and the second body wedge members 74 and 76 to drive the first and the second gate members 26 and 46 in the respective directions 114 and 116 to effect the sealing engagement between the first and the second gate members 26 and 46 and the valve body 12.
In addition, as the first and the second gate 2 ~
members 26 and 46 are moved in the downward direction 112, the inclined surface 92 on the hub 88 engages the inclined surfaces 84 and 86 formed in the respective first and second gate members 26 and 46 to move the first and the second gate members 26 and 46 and the respective directions 114 and 116 for cooperating to effect the sealing engagement between the face seal members 44 and 64 and the respective portions of the valve body 12.`
When it is desired to move or position the gate valve 10 in the opened position, the threaded rod 100 is rotated in the direction 110 thereby causing the hub 88 and the first and the second gate members 26 and 46 connected thereto to be moved in the upward direction 118 (Figure 1) due to the threaded engagement between the threaded rod 100 and the hub 88. As the first and second gate members 26 and 4Ç are moved in the upward direction 118, the side wedges 43, 45, 63 and 65 gradually become disengaged with the first and the second body wedge members 74 and 76, respectively. As the side wedges 43 and 45 become disengaged with the second and the first body wedge members 76 and 74 respectively, the first gate member 26 is moved in the direction 116. As the side wedges 63 and 65 become disengaged with the first and the second body wedge members 74 and 76, respectively, the second gate member 46 is moved in the direction 114. As the first gate member 26 is moved in the direction 116, the face seal member 44 is disengaged from the valve body 12. As the side wedges 63 and 65 are disengaged with the respective first and the second body wedge members 74 and 76, the face seal member 64 is disengaged from the valve body 12.
Thus, as the first and the second gate members 26 and 46 initially are started to be moved in the upward direction 118, the sealingly engagement between the face 20~2~
members 44 and 64 are disengaged thereby freeing the first and the second gate members 26 and 46 to move in the upward direction 118 without rubbing contact between the face seal members 44 and 64 and the valve body 12.
The first and the second gate members 26 and 46 are continued to be moved in the upward direction 118 to a position wherein the first and the second gate members 26 and 46 each are disposed in the transverse bore 24. In this opened position of the first and the second gate members 26 and 46, the first and the second gate members 26 and 46 each are disposed in the transverse bore 24 and each are disposed out of or removed from the flowbore 22.
Thus, in the opened position fluid may flow through the flowbore 22 in a direction either toward the upstream end 18 or the downstream end 20.
The first gate member 26 includes a pair of reinforcing members 120 and 122 (Figures 2 and 3). The second gate member 46 also includes a pair of reinforcing members 124 and 126 (Figures 2 and 4).
The gate valve 10 particularly is adapted to be used in water distribution lines in a water distribution syste~. For example, the gate valve 10 is used in the lines leading to a water works or leading from a water works in a water distribution system. In a water distribution system, fluid commonly can flow in.either direction through a water distribution line. Thus, the gate valve 10 must be adapted to affect a seal in the closed position of the first and the second gate members 26 and 46 to sealingly close the flowbore 22 to prevent water from passing through the flowbore 22 either from the upstream end 18 or the downstream end 20. The use of the two gate members 26 and 46 and the respective sealing of the first and the second gate members 26 and 46 to the valve body 12 particularly adapts the gate valve 10 to be 2~2fi~
used in such water distribution system where flow may be in either direction through the flowbore 22.
Changes may be made in the construction and the operation of the various components, elements and S assemblies described herein without departing from the spirit and scope of the invention as defined in the following claims.
Brief DescriPtion of the Invention The present invention provides a gate valve comprising a valve body having an upper end, a lower end, an upstream end, a downstream end and a flow bore extending axially therethrough intersecting the upstream and the downstream ends thereof, a transverse bore being formed through a portion of the valve body extending about perpendicular to the flow bore and intersecting a portion of the flow bore; a first gate member movably disposed in a portion of the transverse bore generally near the upstream end of the valve body; a second gate member movably disposed in a portion of the transverse bore near the downstream end of the valve body; means connected to the first and the second gate members for moving the first and the second gate members to an opened position wherein the first and the second gate members are disposed in the transverse bore and withdrawn from the flow bore and for moving the first and the second gate members to a closed position wherein the first and the second gate members are disposed in the flow bore for interrupting the flow of fluid through the flow bore between the upstream and the downstream ends of the valve 2 ~ 3 ~
body; seal means for sealing the first gate member to the valve body near the upstream end of the valve body in the closed position of the first gate member: and seal means for sealing the second gate member to the valve body near the downstream end of the valve body in the closed position of the second gate member.
Brief Description of the Drawin~s Figure l is a sectional view taken transversely through a gate valve constructed in accordance with the present invention and showing the gate members in the closed position.
Figure 2 is a sectional view taken axially through the gate valve of Figure 1.
Figure 3 is a partial perspective view of the first gate member used in the gate valve of Figures 1 and 2.
Figure 4 is a partial perspective view of the second gate member used in the gate valve of Figures 1 and 2.
Description of the Preferred Embodiments Shown in Figures 1 and 2 is a gate valve 10 constructed in accordance with the present invention.
The gate valve 10 comprises a valve body 12 having an upper end 14 (Figure 2), a lower end 16, an upstream end 18 (Figure 2) and a downstream end 20 (Figure 2). A
flowbore 22 is formed through the valve body 12. The flowbore 22 extends through the valve body 12 intersecting the upstream end 18 and the downstream end 20.
It should be noted that, although the ends 18 and 20 have been labeled herein as upstream and downstream ends, the gate valve 10 particularly is adapted to accommodate 2o~2fi~
flow in either direction through the flowbore 22 and the terminology "upstream" and downstream" have been used herein merely for the purpose of identifying parts and are not intended to limit the gate valve 10 in any manner to a particular direction of flow through the gate valve 10 .
A transverse bore 24 is formed through the gate valve 10. The transverse bore 24 intersects the upper end 14 of the valve body 12 and extends a distance through the valve body 12 generally perpendicular to the flowbore 22. A lower end of the transverse bore 24 intersects the flowbore 22 at a position generally midway between the upstream end 18 and the downstream end 20 of the valve body 12.
A first gate member 26 (Figures 1, 2 and 3) is movably disposed in a portion of the transverse bore 24 generally near and spaced a distance from the upstream end 18 of the valve body 12. The first gate member 26 has an upstream face 28 and a downstream face 30. The first gate member 26 has an upper portion 32 (Figure 3) which is generally rectangularly shaped and a lower portion 34 (Figure 3) which is generally circular or semicircular shaped with the lower portion 34 extending a distance generally from a midportion of the upper portion 32. A curved edge 36 (Figures 2 and 3) is formed on the lower portion 34 with the curved edge 36 extending generally about the lower portion 34 and being disposed generally between the upstream and the downstream faces 28 and 30.
The first gate member 26 is coated with a corrosion protection coating. Seal member means 38 (Figures 2 and 3) is disposed on the curved edge 36 and the seal member means 38 extends generally over the entire curved edge 36. As shown in Figures 2 and 3, the seal member means 2~542~
38 more particularly comprises a pair of seal members 40 and 42. The seal member means 38 is positioned on the first gate member 26 to sealingly engage a portion of the valve body 12 formed by the flowbore 22 when the first gate member 26 is moved to the closed position.
A semicircular shaped face seal member 44 (Figures 2 and 3) is disposed on the upstream face 28 of the first gate member 26. The face seal member 44 extends in a semicircularly path generally over the upstream face 28 of the first gate member 26. Each end of the face seal member 44 is connected to the respective opposite ends of the seal member means 38 so that the seal member means 38 and the face seal member 44 cooperate to form a generally circularly shaped sealing surface. The face seal member 44 is positioned on the first gate member 26 to sealingly engage a portion of the valve body 12 formed by the transverse bore 22 so that the seal formed by the face seal member 44 and the valve body 12 is disposed generally out of the flowbore 22.
A first side wedge 43 (Figures 1 and 3) is formed on one side of the first gate member 26. The first gate side wedge 43 extends at about a forty-five degree angle.
A second side wedge 45 (Figures 1 and 3) is formed on one side of the first gate member 26, opposite the side having the first side wedge 43 formed thereon. The second side wedge 45 extends at about a forty-five degree angle. The first side wedge 43 is disposed about one hundred-eight degrees from the second side wedge 45.
A second gate member 46 (Figures 2 and 4) is movably disposed in a portion of the transverse bore 24 generally near and spaced a distance from the downstream end 20 of the valve body 12. The second gate member 46 has an upstream face 48 and a downstream face 50 (Figures 2 and 4). The second gate member 46 has an upper portion 52 2 ~ g ~
(Figure 4~ which is generally rectangularly shaped and a lower portion 54 (Figure 4) which is generally circular or semicircular shaped with the lower portion extending a distance generally from a midportion of the upper portion 52. A curved edge 56 (Figures 2 and 4) is formed on the lower portion 54 with the curved edge 56 extending generally about the lower portion 54 and being disposed generally between the upstream and the downstream faces 48 and 50.
The second gate member 46 is coated with a corrosion protection coating. Seal member means 58 (Figures 2 and 4) is disposed on the curved edge 56 and the seal member means 58 extends generally over the entire curved edge 56. As shown in Figures 2 and 4, the seal member means 58 more particularly comprises a pair of seal members 60 and 62. The seal member means 58 is po~itioned on the second gate member 46 to sealingly engage a portion of the valve body 12 formed by the flowbore 22 when the second gate member 46 is moved to the closed position.
A semicircularly shaped face seal member 64 (Figures 2 and 4) is disposed on the downstream face 50 of the second gate member 46. The face seal member 64 extends in a semicircularly path generally over the downstream face 50 of the second gate member 46. Each end of the face seal member 64 is connected to the respective opposite ends of the seal member means 58 so that the seal member means 58 and the face seal member 64 cooperate to form a generally circularly shaped sealing surface. The face seal member 64 is positioned on the second gate member 46 to sealingly engage a portion of the valve body 12 formed by the transverse bore 22 so that the seal formed by the face seal member 64 and the valve body 12 is disposed generally out of the flowbore 22.
2~26~
A first side wedge 63 (Figure 4) is formed on one side of the second gate member 46. The first side wedge 63 extends at about a forty-five degree angle.
A second side wedge 65 (Figure 4~ is formed on one side of the second gate member 46, opposite the side having the first side wedge 63 formed thereon. The`
second side wedge 65 extends at about a forty-five degree angle. The first side wedge 63 is disposed about one hundred eighty degrees from the second side wedge 65.
A first body wedge member 74 (Figures 1 and 2) is formed in a portion of the valve body 12. The first body wedge member 74 is positioned about midway between the upstream and downstream ends 18 and 20. The first body wedge member 74 has a pair of inclined surfaces 73 and 75 (Figure 2). The first body wedge member 74 is disposed in a position out of the flowbore 22.
A second body wedge member 76 (Figure 1) is formed in a portion of the valve body 12. The second body wedge member 76 is positioned about midway between the upstream and downstream ends 18 and 20. The second body wedge member 76 is disposed in the valve body 12 directly opposite the first body wedge member 74. The second body wedge member 76 is constructed exactly like the first body wedge member 74 and includes a pair of inclined surfaces (not shown). The second body wedge member 76 is disposed in a position out of the flowbore 22.
The first side wedge 43 on the gate member 26 is positioned to engage one of the inclined surfaces on the second body wedge member 76 when the first gate member 26 is moved from an opened to a closed position. The second side wedge 45 on the gate member 26 is positioned to engage the inclined surface 73 on the first body wedge member 74 as the first gate member 26 is moved from the opened to the closed position. The first side wedge 63 20~9~
on the second gate member 46 is positioned to engage one of the inclined surfaces on the second body wedge member 76 as the second gate member 46 is moved from the opened to the closed position. The second side wedge 65 on the second gate member 46 is positioned to engage the inclined surface 75 on the first body wedge member 74 as the second gate member 46 is moved to the opened to the closed position.
A slot 80 tFigures 1 and 3) is formed in the first gate member 26. The slot 80 more particularly is formed in the upper portion 32 of the first gate member 26 and disposed generally near an upper end of the first gate member 26.
A slot 82 (Figure 4) is formed in the second gate member 46. The slot 82 more particularly is formed in the upper portion 52 of the second gate member 46 and disposed generally near an upper end of th~ second gate member 46.
The slot 80 includes an inclined surface 84 (Figures 1 and 3) formed in the first gate member 26. The slot 82 includes an inclined surface 86 (Figure 4) formed in the second gate member 46. The purpose and function of the inclined surfaces 84 and 86 will be described in greater detail below.
A hub 88 (Figures 1 and 2) is disposed between the first and the second gate members 26 and 46. The hub 88 has a flange 90 (Figures 1 and 2) which extends circumferentially about the hub 88. The flange 90 has an inclined surface 92 (Figures 1 and 2) formed on a lower portion with the inclined surface 92 extending generally circumferentially about the hub 88. The portion of the flange 90 is disposed in the slot 80 formed in the first gate member 26 and another portion of the flange 90 is disposed in the slot 82 formed in the second gate member ~a~2~3 46. The hub 88 is positioned between the two gate members 26 and 46 so that a portion of the inclined surface 92 on the flange 90 engages and mates with the inclined surface 84 formed in the slot 80 and another portion of the inclined surface 92 on the flange 90 engages and mates with the inclined surface 86 formed in the slot 82.
The hub 88 has an upper end 94 and a lower end 96.
A threaded opening 98 is formed through the hub 88 intersecting upper and lower ends 94 and 96 of the hub 88.
A threaded rod 100 (Figures 1 and 2) having a lower end 102 and an upper end 104 is disposed in the transverse bore 24. The upper end 104 of the threaded rod 100 extends through the upper end 14 of the valve body 12. The lower end 102 of the threaded rod lO0 extends through the threaded opening 98 in the hub 88 and threadedly engages the hub 88 to threadedly connect the threaded rod 100 to the hub 88.
A flange 106 (Figures l and 2) is formed on the threaded rod lO0 generally near the upper end 104. The flange 106 engages a portion of the upper end 14 of the valve body 12 for cooperating to support the threaded rod 100 in the transverse bore 24. The upper end 104 of the threaded rod 100 extends a distance above and beyond the upper end 14 of the valve body 12 the upper end 102 of the threaded rod 100 is adapted to be rotated via hand operated mechanical device in either a direction 108 (Figure 1) or a direction 110 (Figure 1). It should be noted that the threaded rod 100 also can be rotated via a motor and gear arrangement or by ~ay of any other means for rotating a threaded rod 100 if desired in particular application of the gate valve 10.
In the opened position of the first and the second 20~26~
gate members 26 and 46, the first and the second gate members 26 and 46 each are disposed in the transverse bore 24 and each are removed from the flowbore 22 thereby allowing the flow of fluid from the upstream end 18 through the flowbore 22 and out the downstream end 20 or in the reverse direction. When it is desired to close`
the gate valve 10, the threaded rod 100 is rotated in the direction 108. As the threaded rod 100 is rotated in the direction 108, the threaded rod 100 threadingly engages the hub 98 thereby moving the hub 98 and the first and the second gate members 26 and 46 connected thereto in a downward direction 112 (Figure 1). As the threaded rod 100 is rotated in the direction 108, the first and the second gate members 26 and 46 are moved in the downward direction 112 to a position wherein the first side wedge 43 on the first gate member 26 engages the second body wedge member 76 and the second side wedge 45 on the first gate member 26 engages the first body wedge member 74.
Further, as the first and the second gate members 26 and 46 are moved in the downward direction 112, the first side wedge 63 on the second gate member 46 engages the first body wedge member 74 and the second side wedge 65 on the second gate member 46 engages the second body wedge member 76. As the first and the second gate members 26 and 46 continue to be moved in the downward direction 112, the engagement between the first side wedge 43 and the second body wedge member 76 and the engagement between the second side wedge 45 and the first body wedge member 74 causes the first gate member 26 to be moved in a direction 114 ~Figure 2) generally toward the upstream end 18 of the valve body 12. Further, the engagement between the first side wedge 63 and the first body wedge member 74 and the engagement between the second side wedge 65 and the second body wedge member 76 20~26~
causes the second gate member 46 to be moved in a direction 116 (Figure 2) generally toward the downstream end 20 of the valve body 12. As the first and the second gate members 26 and 46 are moved to the alosed position (Figure 2), the engagement between the first side wedge 43 and the second body wedge member 76 and the engagement between the second side wedge 45 and the first body wedge member 74 cause the first gate member 2~ to be moved ~n the direction 114 to a position wherein the face seal member 44 and the first gate member 26 sealingly engages a portion of the valve body 12 and the seal member means 38 engages a portion of the valve body 12 formed by the flowbore 22 thereby forming a circularly shaped seal so that the first gate 26 sealingly closes the flowbore 22.
Simultaneously, as the second gate member 46 is moved in the downward direction 112, the second gate member is moved in the direction 116 by the engagement between the first side wedge 63 and the first body wedge member 74 and the engagement between the second side wedge 65 and the second body wedge member 76 to a position wherein the face seal member 64 of the second gate member 46 sealingly engages a portion of the valve body 12 and the seal member means 58 sealingly engages a portion of the valve body 12 formed by the flowbore 22. The seal member means 58 and the face seal 64 cooperate to form a circularly shaped seal between the second gate member 46 and the valve body 12. The side wedge members 43, 45, 63 and 65 cooperate with the first and the second body wedge members 74 and 76 to drive the first and the second gate members 26 and 46 in the respective directions 114 and 116 to effect the sealing engagement between the first and the second gate members 26 and 46 and the valve body 12.
In addition, as the first and the second gate 2 ~
members 26 and 46 are moved in the downward direction 112, the inclined surface 92 on the hub 88 engages the inclined surfaces 84 and 86 formed in the respective first and second gate members 26 and 46 to move the first and the second gate members 26 and 46 and the respective directions 114 and 116 for cooperating to effect the sealing engagement between the face seal members 44 and 64 and the respective portions of the valve body 12.`
When it is desired to move or position the gate valve 10 in the opened position, the threaded rod 100 is rotated in the direction 110 thereby causing the hub 88 and the first and the second gate members 26 and 46 connected thereto to be moved in the upward direction 118 (Figure 1) due to the threaded engagement between the threaded rod 100 and the hub 88. As the first and second gate members 26 and 4Ç are moved in the upward direction 118, the side wedges 43, 45, 63 and 65 gradually become disengaged with the first and the second body wedge members 74 and 76, respectively. As the side wedges 43 and 45 become disengaged with the second and the first body wedge members 76 and 74 respectively, the first gate member 26 is moved in the direction 116. As the side wedges 63 and 65 become disengaged with the first and the second body wedge members 74 and 76, respectively, the second gate member 46 is moved in the direction 114. As the first gate member 26 is moved in the direction 116, the face seal member 44 is disengaged from the valve body 12. As the side wedges 63 and 65 are disengaged with the respective first and the second body wedge members 74 and 76, the face seal member 64 is disengaged from the valve body 12.
Thus, as the first and the second gate members 26 and 46 initially are started to be moved in the upward direction 118, the sealingly engagement between the face 20~2~
members 44 and 64 are disengaged thereby freeing the first and the second gate members 26 and 46 to move in the upward direction 118 without rubbing contact between the face seal members 44 and 64 and the valve body 12.
The first and the second gate members 26 and 46 are continued to be moved in the upward direction 118 to a position wherein the first and the second gate members 26 and 46 each are disposed in the transverse bore 24. In this opened position of the first and the second gate members 26 and 46, the first and the second gate members 26 and 46 each are disposed in the transverse bore 24 and each are disposed out of or removed from the flowbore 22.
Thus, in the opened position fluid may flow through the flowbore 22 in a direction either toward the upstream end 18 or the downstream end 20.
The first gate member 26 includes a pair of reinforcing members 120 and 122 (Figures 2 and 3). The second gate member 46 also includes a pair of reinforcing members 124 and 126 (Figures 2 and 4).
The gate valve 10 particularly is adapted to be used in water distribution lines in a water distribution syste~. For example, the gate valve 10 is used in the lines leading to a water works or leading from a water works in a water distribution system. In a water distribution system, fluid commonly can flow in.either direction through a water distribution line. Thus, the gate valve 10 must be adapted to affect a seal in the closed position of the first and the second gate members 26 and 46 to sealingly close the flowbore 22 to prevent water from passing through the flowbore 22 either from the upstream end 18 or the downstream end 20. The use of the two gate members 26 and 46 and the respective sealing of the first and the second gate members 26 and 46 to the valve body 12 particularly adapts the gate valve 10 to be 2~2fi~
used in such water distribution system where flow may be in either direction through the flowbore 22.
Changes may be made in the construction and the operation of the various components, elements and S assemblies described herein without departing from the spirit and scope of the invention as defined in the following claims.
Claims (18)
1. A gate valve comprising:
a valve body having an upper end, a lower end, an upstream end, a downstream end and a flow bore extending axially therethrough intersecting the upstream and the downstream ends thereof, a transverse bore being formed through a portion of the valve body extending about perpendicular to the flow bore and intersecting a portion of the flow bore;
a first gate member movably disposed in a portion of the transverse bore generally near the upstream end of the valve body;
a second gate member movably disposed in a portion of the transverse bore near the downstream end of the valve body;
means connected to the first and the second gate members for moving the first and the second gate members to an opened position wherein the first and the second gate members are disposed in the transverse bore and withdrawn from the flow bore and for moving the first and the second gate members to a closed position wherein the first and the second gate members are disposed in the flow bore for interrupting the flow of fluid through the flow bore between the upstream and the downstream ends of the valve body;
seal means for sealing the first gate member to the valve body near the upstream end of the valve body in the closed position of the first gate member; and seal means for sealing the second gate member to the valve body near the downstream end of the valve body in the closed position of the second gate member.
a valve body having an upper end, a lower end, an upstream end, a downstream end and a flow bore extending axially therethrough intersecting the upstream and the downstream ends thereof, a transverse bore being formed through a portion of the valve body extending about perpendicular to the flow bore and intersecting a portion of the flow bore;
a first gate member movably disposed in a portion of the transverse bore generally near the upstream end of the valve body;
a second gate member movably disposed in a portion of the transverse bore near the downstream end of the valve body;
means connected to the first and the second gate members for moving the first and the second gate members to an opened position wherein the first and the second gate members are disposed in the transverse bore and withdrawn from the flow bore and for moving the first and the second gate members to a closed position wherein the first and the second gate members are disposed in the flow bore for interrupting the flow of fluid through the flow bore between the upstream and the downstream ends of the valve body;
seal means for sealing the first gate member to the valve body near the upstream end of the valve body in the closed position of the first gate member; and seal means for sealing the second gate member to the valve body near the downstream end of the valve body in the closed position of the second gate member.
2. The gate valve of claim 1 wherein the first gate member comprises an upstream face, a downstream face and an outer peripheral surface, and wherein the seal means for sealing the first valve member to the valve body further comprises:
a face seal member disposed on the upstream face of the first gate member; and wherein the gate valve further comprises:
means for biasing the first gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the first gate member in the closed position of the first gate member; and wherein the second gate member comprises an upstream face, a downstream face and an outer peripheral surface, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the downstream face of the second gate member; and wherein the gate valve further comprises:
means for and biasing the second gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the second gate member in the closed position of the second gate member.
a face seal member disposed on the upstream face of the first gate member; and wherein the gate valve further comprises:
means for biasing the first gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the first gate member in the closed position of the first gate member; and wherein the second gate member comprises an upstream face, a downstream face and an outer peripheral surface, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the downstream face of the second gate member; and wherein the gate valve further comprises:
means for and biasing the second gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the second gate member in the closed position of the second gate member.
3. The gate valve of Claim 2 wherein the means for biasing the first gate member and the means for biasing the second gate member further comprises:
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the first gate member and a second side wedge member formed on the opposite side of the first gate member, the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate member is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the`
second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the first gate member and a second side wedge member formed on the opposite side of the first gate member, the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate member is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the`
second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
4. The gate valve of Claim 2 wherein the means for sealing the first gate member to the valve body further comprises further:
seal member means disposed on a portion of the outer peripheral surface of the first gate member for sealingly engaging a portion of the valve body when the first gate member is moved to the closed position; and wherein the means for sealing the second gate member to the valve body further comprises:
seal member means connected a portion of the outer peripheral surface of the second gate member for sealingly engaging a portion of the valve body when the second gate member is moved to the closed position.
seal member means disposed on a portion of the outer peripheral surface of the first gate member for sealingly engaging a portion of the valve body when the first gate member is moved to the closed position; and wherein the means for sealing the second gate member to the valve body further comprises:
seal member means connected a portion of the outer peripheral surface of the second gate member for sealingly engaging a portion of the valve body when the second gate member is moved to the closed position.
5. The gate valve of Claim 1 wherein the first gate member comprises a generally semicircular lower portion and a generally rectangularly shaped upper portion, an upstream face and a downstream face, the lower portion having a generally semicircularly shaped outer peripheral surface disposed generally between the upstream face and the downstream face, and wherein the seal means for sealing the first gate member to the valve body further comprises:
a face seal member disposed on the upstream face of the first gate member, the face seal member extending generally about a portion of the upper portion of the first gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the first gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the first gate member and the valve body when the first gate member is moved to the closed position; and wherein the second gate member comprises a generally semicircular lower portion and a generally rectangularly shaped upper portion, an upstream face and a downstream face, the lower portion having a generally semicircularly shaped outer peripheral surface disposed generally between the upstream face and the downstream face, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the upstream face of the second gate member, the face seal member extending generally about a portion of the upper portion of the second gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the second gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the second gate member and the valve body when the second gate member is moved to the closed position.
a face seal member disposed on the upstream face of the first gate member, the face seal member extending generally about a portion of the upper portion of the first gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the first gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the first gate member and the valve body when the first gate member is moved to the closed position; and wherein the second gate member comprises a generally semicircular lower portion and a generally rectangularly shaped upper portion, an upstream face and a downstream face, the lower portion having a generally semicircularly shaped outer peripheral surface disposed generally between the upstream face and the downstream face, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the upstream face of the second gate member, the face seal member extending generally about a portion of the upper portion of the second gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the second gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the second gate member and the valve body when the second gate member is moved to the closed position.
6. The gate valve of Claim 5 wherein the means for biasing the first gate member and the means for biasing the second gate member further comprises:
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the gate member and a second side wedge member formed on the opposite side of the first gate member, the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate valve is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the gate member and a second side wedge member formed on the opposite side of the first gate member, the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate valve is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
7. The gate valve of Claim 1 wherein the first gate member further comprises a slot formed in the downstream face of the first gate member, and wherein the second gate member further comprises a slot formed in the upstream face of the second gate member, and wherein the means for moving the first and the second gate members to the opened and the closed positions further comprises:
a hub disposed between the first and the second gate members having a flange formed on an outer peripheral surface of the hub and extending generally circumferentially about the hub, a portion of the flange being disposed in the slot and the first gate member and a portion of the flange being disposed in the slot in the second gate member, the hub having an upper end and a lower end and a threaded opening extending through the hub intersecting the upper and the lower ends of the hub;
and a threaded rod having an upper end and a lower end, the threaded rod being threadedly disposed through the threaded opening in the hub, the upper end of the threaded rod extended through the upper end of the valve body and extending a distance beyond the upper end of the valve body, the threaded rod being rotatable in one direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally upwardly direction toward the opened position and the threaded rod being rotatable in one other direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally downwardly direction toward the closed position.
a hub disposed between the first and the second gate members having a flange formed on an outer peripheral surface of the hub and extending generally circumferentially about the hub, a portion of the flange being disposed in the slot and the first gate member and a portion of the flange being disposed in the slot in the second gate member, the hub having an upper end and a lower end and a threaded opening extending through the hub intersecting the upper and the lower ends of the hub;
and a threaded rod having an upper end and a lower end, the threaded rod being threadedly disposed through the threaded opening in the hub, the upper end of the threaded rod extended through the upper end of the valve body and extending a distance beyond the upper end of the valve body, the threaded rod being rotatable in one direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally upwardly direction toward the opened position and the threaded rod being rotatable in one other direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally downwardly direction toward the closed position.
8. The gate valve of Claim 3 wherein the first and the second body wedge members each are positioned in the valve body and the first and the second side wedges are positioned on the first gate member whereby the first and the second side wedges on the first gate member are disengaged from the first and the second body wedge members when the first gate member is moved toward the opened position, and wherein the first and the second side wedges are positioned on the second gate member and the first and the second body wedge members are positioned on the valve body whereby the first and the second side wedges on the second gate member are disengaged from the first and the second body wedge members when the second gate member is moved toward the opened position.
9. The gate valve of Claim 3 wherein the first and the second side wedges on the first gate member are disengaged from the first and the second body wedge members when the first gate member is moved from the closed toward the opened position whereby the face seal member on the first gate member is removed from sealingly engagement with the valve body and wherein the first and the second side wedges on the second gate member are disengaged from the first and the second body wedge members as the second gate member is moved from the closed toward the opened position whereby the face seal member on the second gate member is removed from sealing engagement with the valve body.
10. An improved gate valve for use in a water distribution system having water distribution lines wherein the gate valve comprises a valve body having an upper end, a lower end, an upstream end, downstream end and a flowbore extending axially therethrough intersecting the upstream and the downstream ends thereof, a transverse bore formed through a portion of the valve body extending about perpendicular to the flowbore and intersecting a portion of the flowbore, the improvement comprising:
a first gate member movably disposed in a portion of the transverse bore generally near the upstream end of the valve body;
a second gate member movably disposed in a portion of the transverse bore near the downstream end of the valve body;
means connected to the first and the second gate members for moving the first and the second gate members to an opened position wherein the first and the second gate members are disposed in the transverse bore and withdrawn from the flow bore and for moving the first and the second gate members to a closed position wherein the first and the second gate members are disposed in the flow bore for interrupting the flow of fluid through the flow bore between the upstream and the downstream ends of the valve body:
seal means for sealing the first gate member to the valve body near the upstream end of the valve body in the closed position of the first gate member; and seal means for sealing the second gate member to the valve body near the downstream end of the valve body in the closed position of the second gate member.
a first gate member movably disposed in a portion of the transverse bore generally near the upstream end of the valve body;
a second gate member movably disposed in a portion of the transverse bore near the downstream end of the valve body;
means connected to the first and the second gate members for moving the first and the second gate members to an opened position wherein the first and the second gate members are disposed in the transverse bore and withdrawn from the flow bore and for moving the first and the second gate members to a closed position wherein the first and the second gate members are disposed in the flow bore for interrupting the flow of fluid through the flow bore between the upstream and the downstream ends of the valve body:
seal means for sealing the first gate member to the valve body near the upstream end of the valve body in the closed position of the first gate member; and seal means for sealing the second gate member to the valve body near the downstream end of the valve body in the closed position of the second gate member.
11. The gate valve of Claim 10 wherein the first gate member comprises an upstream face, a downstream face and an outer peripheral surface, and wherein the seal means for sealing the first valve member to the valve body further comprises:
a face seal member disposed on the upstream face of the first gate member; and wherein the gate valve further comprises:
means for biasing the first gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the first gate member in the closed position of the first gate member; and wherein the second gate member comprises an upstream face, a downstream face and an outer peripheral surface, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the downstream face of the second gate member; and wherein the gate valve further comprises:
means for and biasing the second gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the second gate member in the closed position of the second gate member.
a face seal member disposed on the upstream face of the first gate member; and wherein the gate valve further comprises:
means for biasing the first gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the first gate member in the closed position of the first gate member; and wherein the second gate member comprises an upstream face, a downstream face and an outer peripheral surface, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the downstream face of the second gate member; and wherein the gate valve further comprises:
means for and biasing the second gate member to a position wherein the face seal member sealingly engages the valve body and forms a seal between the valve body and the second gate member in the closed position of the second gate member.
12. The gate valve of Claim 11 wherein the means for biasing the first gate member and the means for biasing the second gate member further comprises:
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the first gate member and a second side wedge member formed on the opposite side of the first gate member the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate member is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the first gate member and a second side wedge member formed on the opposite side of the first gate member the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate member is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
13. The gate valve of Claim 11 wherein the means for sealing the first gate member to the valve body further comprises further:
seal member means disposed on a portion of the outer peripheral surface of the first gate member for sealingly engaging a portion of the valve body when the first gate member is moved to the closed position; and wherein the means for sealing the second gate member to the valve body further comprises:
seal member means connected a portion of the outer peripheral surface of the second gate member for sealingly engaging a portion of the valve body when the second gate member is moved to the closed position.
seal member means disposed on a portion of the outer peripheral surface of the first gate member for sealingly engaging a portion of the valve body when the first gate member is moved to the closed position; and wherein the means for sealing the second gate member to the valve body further comprises:
seal member means connected a portion of the outer peripheral surface of the second gate member for sealingly engaging a portion of the valve body when the second gate member is moved to the closed position.
14. The gate valve of Claim 10 wherein the first gate member comprises a generally semicircular lower portion and a generally rectangularly shaped upper portion, an upstream face and a downstream face, the lower portion having a generally semicircularly shaped outer peripheral surface disposed generally between the upstream face and the downstream face, and wherein the seal means for sealing the first gate member to the valve body further comprises: `
a face seal member disposed on the upstream face of the first gate member, the face seal member extending generally about a portion of the upper portion of the first gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the first gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the first gate member and the valve body when the first gate member is moved to the closed position; and wherein the second gate member comprises a generally semicircular lower portion and a generally rectangularly shaped upper portion, an upstream face and a downstream face, the lower portion having a generally semicircularly shaped outer peripheral surface disposed generally between the upstream face and the downstream face, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the upstream face of the second gate member, the face seal member extending generally about a portion of the upper portion of the second gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the second gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the second gate member and the valve body when the second gate member is moved to the closed position.
a face seal member disposed on the upstream face of the first gate member, the face seal member extending generally about a portion of the upper portion of the first gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the first gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the first gate member and the valve body when the first gate member is moved to the closed position; and wherein the second gate member comprises a generally semicircular lower portion and a generally rectangularly shaped upper portion, an upstream face and a downstream face, the lower portion having a generally semicircularly shaped outer peripheral surface disposed generally between the upstream face and the downstream face, and wherein the seal means for sealing the second gate member to the valve body further comprises:
a face seal member disposed on the upstream face of the second gate member, the face seal member extending generally about a portion of the upper portion of the second gate member and being positioned in to engage a portion of the valve body removed from the flowbore; and seal member means disposed on the outer peripheral surface of the lower portion of the second gate member positioned to sealingly engage a portion of the valve body formed by the flowbore, the seal member means cooperating with the face seal member to form a substantially circularly shaped and continuous seal between the upstream face of the second gate member and the valve body when the second gate member is moved to the closed position.
15. The gate valve of Claim 14 wherein the means for biasing the first gate member and the means for biasing the second gate member further comprises:
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the gate member and a second side wedge member formed on the opposite side of the first gate member, the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate valve is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
a first body wedge member connected to the valve body;
a second body wedge member connected to the valve body and disposed generally opposite the first body wedge member;
a first side wedge formed on one side of the gate member and a second side wedge member formed on the opposite side of the first gate member, the first side wedge engaging the second body wedge member and the second side wedge engaging the first body member as the first gate valve is moved from the opened to the closed position for moving the face seal member on the first gate member and to sealingly engagement with the valve body;
a first side wedge formed on one side of the second gate member and a second side wedge formed on the opposite side of the second gate member, the first side wedge engaging the first body wedge member and the second side wedge engaging the second body wedge member as the second gate member is moved from the opened to the closed position for moving the face seal member on the second gate member into sealing engagement with the valve body.
16. The gate valve of Claim 10 wherein the first gate member further comprises a slot formed in the downstream face of the first gate member, and wherein the second gate member further comprises a slot formed in the upstream face of the second gate member, and wherein the means for moving the first and the second gate members to the opened and the closed positions further comprises:
a hub disposed between the first and the second gate members having a flange formed on an outer peripheral surface of the hub and extending generally circumferentially about the hub, a portion of the flange being disposed in the slot and the first gate member and a portion of the flange being disposed in the slot in the second gate member, the hub having an upper end and a lower end and a threaded opening extending through the hub intersecting the upper and the lower ends of the hub;
and a threaded rod having an upper end and a lower end, the threaded rod being threadedly disposed through the threaded opening in the hub, the upper end of the threaded rod extended through the upper end of the valve body and extending a distance beyond the upper end of the valve body, the threaded rod being rotatable in one direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally upwardly direction toward the opened position and the threaded rod being rotatable in one other direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally downwardly direction toward the closed position.
a hub disposed between the first and the second gate members having a flange formed on an outer peripheral surface of the hub and extending generally circumferentially about the hub, a portion of the flange being disposed in the slot and the first gate member and a portion of the flange being disposed in the slot in the second gate member, the hub having an upper end and a lower end and a threaded opening extending through the hub intersecting the upper and the lower ends of the hub;
and a threaded rod having an upper end and a lower end, the threaded rod being threadedly disposed through the threaded opening in the hub, the upper end of the threaded rod extended through the upper end of the valve body and extending a distance beyond the upper end of the valve body, the threaded rod being rotatable in one direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally upwardly direction toward the opened position and the threaded rod being rotatable in one other direction for threadedly engaging the threaded opening in the hub and moving the hub and the first and the second gate members connected thereto in a generally downwardly direction toward the closed position.
17. The gate valve of Claim 12 wherein the first and the second body wedge members each are positioned in the valve body and the first and the second side wedges are positioned on the first gate member whereby the first and the second side wedges on the first gate member are disengaged from the first and the second body wedge members when the first gate member is moved toward the opened position, and wherein the first and the second side wedges are positioned on the second gate member and the first and the second body wedge members are positioned on the valve body whereby the first and the second side wedges on the second gate member are disengaged from the first and the second body wedge members when the second gate member is moved toward the opened position.
18. The gate valve of Claim 12 wherein the first and the second side wedges on the first gate member are disengaged from the first and the second body wedge members when the first gate member is moved from the closed toward the opened position whereby the face seal member on the first gate member is removed from sealingly engagement with the valve body and wherein the first and the second side wedges on the second gate member are disengaged from the first and the second body wedge members as the second gate member is moved from the closed toward the opened position whereby the face seal member on the second gate member is removed from sealing engagement with the valve body.
1s39/epoform.2 or C:\wp51\bevclms\tyler604.714
1s39/epoform.2 or C:\wp51\bevclms\tyler604.714
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60471490A | 1990-10-26 | 1990-10-26 | |
| US604,714 | 1990-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2054265A1 true CA2054265A1 (en) | 1992-04-27 |
Family
ID=24420724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2054265 Abandoned CA2054265A1 (en) | 1990-10-26 | 1991-10-25 | Gate valve with two gate members |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2054265A1 (en) |
-
1991
- 1991-10-25 CA CA 2054265 patent/CA2054265A1/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3662778A (en) | Gate valve structure | |
| US5193573A (en) | Ball valve having replaceable seals under full service pressure | |
| US6267353B1 (en) | Self draining valve | |
| US5285816A (en) | One way valve | |
| US5090450A (en) | Plug valve | |
| JPH0650150B2 (en) | Ball valve | |
| JP2775342B2 (en) | Check valve with low open holding pressure | |
| JPH0222270B2 (en) | ||
| WO1991014891A1 (en) | A ball valve | |
| US5099877A (en) | Swing element valve | |
| DE2236070C2 (en) | Butterfly valve or non-return valve | |
| CA2054265A1 (en) | Gate valve with two gate members | |
| US5899438A (en) | Gate valve having a swingable-slidable valve plate | |
| US6969044B2 (en) | Apparatus for controlling a fluid discharge | |
| US3480254A (en) | Angle seating butterfly valve with skewed disc | |
| US5836336A (en) | Cut-off diaphragm gate valve | |
| US5713556A (en) | Composite-action butterfly valve | |
| EP0836689B1 (en) | Gate valve | |
| US3190611A (en) | Check valve with positive closing means | |
| US4520995A (en) | Dished disc free-disc butterfly valve | |
| JPH027340Y2 (en) | ||
| US6588728B2 (en) | Modified isbester (MI) flow control gate valve | |
| JPH0229328Y2 (en) | ||
| JPH08247332A (en) | Valve device | |
| RU2229648C1 (en) | Straight-way valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |