US20180292014A1 - Valve With Removable Seat - Google Patents
Valve With Removable Seat Download PDFInfo
- Publication number
- US20180292014A1 US20180292014A1 US16/006,246 US201816006246A US2018292014A1 US 20180292014 A1 US20180292014 A1 US 20180292014A1 US 201816006246 A US201816006246 A US 201816006246A US 2018292014 A1 US2018292014 A1 US 2018292014A1
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- United States
- Prior art keywords
- valve seat
- valve
- housing
- inlet
- outlet
- 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
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Classifications
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0272—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor permitting easy assembly or disassembly
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- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
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- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- 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
- F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7504—Removable valve head and seat unit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7504—Removable valve head and seat unit
- Y10T137/7668—Retained by bonnet or closure
Definitions
- This invention concerns valves used in high wear environments.
- slurry In hydraulic fluid handling valve applications there are many different fluid media to be considered, including, for example, water, various chemicals, as well as thick, highly abrasive fluids commonly called slurry. Slurries can have different levels of solid content as well as particle sizes. Because slurries have a higher level of solids content than typical hydraulic fluids, they present unique operational difficulties such as increased wear rate of piping and valves in systems transporting slurry.
- Typical valves used in slurry applications are pinch and knife gate valves which are designed specifically for the increased solid content of the fluid and the resultant greater wear on components. In order to service these types of valves it is necessary to remove either the entire valve or significant sections of pipe attached to the valve, resulting in increased down time of the production line and loss of associated revenue.
- the valve comprises a housing having an inlet and an outlet.
- a cavity is positioned within the housing between the inlet and the outlet.
- a first opening in the housing provides access to the cavity.
- a valve seat is positioned within the cavity and sealingly engages the housing. The valve seat is insertable into and removable from the cavity through the first opening.
- a closing member comprising a body rotatably mounted within the valve seat, and the body is rotatably movable between the open and the closed positions.
- a first actuator is mounted on the housing and is engageable with the valve seat for removing the valve seat and the valve closing member from the cavity through the first opening.
- a second actuator is mounted on the housing engaged with the valve closing member for moving the valve closing member between the open and the closed positions.
- the valve closing member in this embodiment comprises a disk.
- the cavity may be defined by first and second walls positioned within the housing and oriented transversely to a flow axis extending from the inlet to the outlet.
- the first and second walls are in spaced relation to one another, each wall having a surface facing toward and sealingly engaged with the valve seat.
- the housing comprises a first segment defining the first opening and a second segment attached to the first segment.
- the first and second segments are attached to one another end to end and define the inlet and the outlet and a flow axis extending therebetween.
- each of the first and second segments comprises first and second lugs projecting outwardly from opposite ends thereof. The lugs each have at least one hole for receiving a fastener for attaching the segments to one another.
- each of the first and second segments comprises first and second arcuate projections positioned on opposite sides of the segments.
- the first and second arcuate projections surround the flow axis and extending radially there toward.
- each of the first and second segments comprises first and second grooves positioned on opposite sides of the segments, each of the grooves facing the flow axis.
- First and second gaskets are respectively positioned within the first and second grooves.
- the first and second grooves extend over interfacing surfaces of the first and second lugs of the first and second segments.
- the first and second gaskets also extend along the first and second grooves in the lugs.
- the inlet has an inner diameter and the valve seat defines an aperture having an inner diameter smaller than the inner diameter of the inlet thereby defining a sealing surface facing the inlet.
- the sealing surface may comprise at least one projection extending toward the inlet.
- the outlet may have an inner diameter and the valve seat may define an aperture having an inner diameter smaller than the inner diameter of the outlet thereby defining a sealing surface facing the outlet.
- the sealing surface comprises at least one projection extending toward the outlet.
- FIG. 1 shows an isometric view of an example valve embodiment according to the invention
- FIGS. 2 and 3 show longitudinal sectional views of a portion of the valve shown in FIG. 1 ;
- FIGS. 2A and 2B show portions of the valve of FIG. 1 in isolation
- FIG. 4 shows a cross sectional view taken at lines 4 - 4 of FIG. 2 ;
- FIGS. 5 and 6 are isometric views showing example embodiments of portions of valves according to the invention.
- FIGS. 7-9 are partial sectional isometric views illustrating an example method of replacing a valve seat according to the invention.
- FIG. 10 is a partial isometric sectional view of an example embodiment of a valve seat according to the invention.
- FIG. 11 is a partial isometric sectional view of an example embodiment of a valve seat and valve closing member according to the invention.
- FIG. 1 shows an example embodiment of a valve 10 according to the invention.
- Valve 10 comprises a housing 12 having an inlet 14 and an outlet 16 .
- Housing 12 may be formed from a metal such as ductile iron, cast iron or steel, composites such as fiberglass, and polymers such as PVC (polyvinylchloride).
- Housing 12 comprises a first segment 18 and a second segment 20 attached to one another end to end and thereby define the inlet 14 , the outlet 16 , and a flow axis 22 extending between them.
- the segments 18 and 20 have projecting lugs 24 each having one or more aligned holes 26 that receive fasteners 28 for attaching the segments to one another.
- the segments will have arcuate projections 30 (also known as “keys”) positioned on opposite sides 32 and 34 of the segments 18 and 20 .
- the arcuate projections 30 surround and face the flow axis 22 and extend radially toward it, allowing them to engage circumferential grooves within the pipe elements and provide mechanical engagement to retain the pipe elements to the valve 10 .
- a cavity 36 is positioned within the housing 12 between the inlet 14 and the outlet 16 .
- a first opening 38 within the first segment 18 provides access to cavity 36 .
- a valve seat 40 is positioned within the cavity 36 .
- Valve seat 40 may be advantageously formed from a resilient, flexible material such as a rubber compound or urethane.
- the valve seat is insertable into the cavity 36 through the opening 38 and sealingly engages the housing.
- sealing engagement between seat 40 and housing 12 is effected through contact between oppositely facing surfaces 42 and 44 of the valve seat respectively engaging first and second housing walls 46 and 48 .
- Walls 46 and 48 are oriented transversely to the flow axis 22 and are in spaced relation from one another to define the cavity 36 .
- valve seat 40 Upon insertion into cavity 36 , the valve seat 40 is compressed between the walls 46 and 48 to effect a seal at the engaging surfaces. Note that it may be advantageous to position projections 50 on the surfaces 42 and 44 to ensure a uniform compression, and hence, a fluid tight seal, between valve seat 40 and housing 12 .
- Inlet 14 and outlet 16 each have respective inner diameters 14 a and 16 a which are substantially aligned with an aperture 52 defined by the valve seat. Together the inlet 14 , outlet 16 and aperture 52 define the flow axis 22 through the valve 10 .
- the aperture 52 of the valve seat 40 has an inner diameter 52 a less than the respective inner diameters 14 a and 16 a of the inlet 14 and the outlet 16 .
- This difference in diameters creates two axial sealing surfaces, sealing surface 54 , which faces inlet 14 , and sealing surface 56 , which faces outlet 16 .
- axial sealing surfaces 54 and 56 engage the ends of pipe elements 58 and 60 joined by the valve 10 .
- Compression between the ends of pipe elements 58 and 60 and the axial sealing surfaces 54 and 56 is provided by the positions of arcuate projections 30 and the pipe element's circumferential grooves 62 .
- Axial projections 64 positioned respectively on the sealing surfaces 54 and 56 and extending respectively toward the inlet 14 and outlet 16 may be used to ensure a uniform seal between the pipe elements 58 and 60 and the seat 40 .
- Additional or alternate sealing between the pipe elements 58 and 60 and the housing may be effected by gaskets 66 positioned in respective grooves 68 and 70 in the segments 18 and 20 .
- Grooves 68 and 70 are positioned on opposite sides 32 and 34 of the segments and face the flow axis 22 .
- Gaskets 66 engage the segments and the pipe elements to effect a fluid tight seal therebetween. As shown in FIGS. 2A, 2B and 4 , grooves 68 and 70 and gaskets 66 may also extend along the interfacing surfaces 24 a and 24 b of lugs 24 . This seal configuration is shown in FIG. 2B in isolation to demonstrate how the seals 66 engage one another and form a complete sealing boundary to eliminate any potential leak paths between segments 18 and 20 .
- valve seat 40 comprises first and second sealing surfaces 72 and 74 arranged spaced apart from one another in facing relation to define a slot 76 .
- a valve closing member in the form of a gate 78 is slidably movable within slot 76 between a closed position (shown in FIG. 2 ) wherein gate 78 sealingly engages the sealing surfaces 72 and 74 and obstructs flow through the aperture 52 , and an open position (shown in FIG. 3 ) which permits flow between the inlet 14 and outlet 16 .
- Gate 78 may be made of metal, for example, steel, as well as composites such as fiberglass, as well as polymers such as HDPE (high density polyethylene). Gate 78 is in compressive engagement with sealing surfaces 72 and 74 when in the closed position. To ensure a uniform seal between the gate 78 and the valve seat 40 , it is advantageous to position circumferential projections 80 on the surfaces 72 and 74 .
- Movement of gate 78 is effected by an actuator, in this example a rising stem jackscrew 82 (see FIG. 1 ) mounted on the first segment 18 of the housing 12 .
- actuators in this example pneumatic actuators, hydraulic actuators and electrical actuators, are also feasible.
- the shaft of jackscrew 82 engages the gate 78 separately from the valve seat 40 , and rotation of the jackscrew's actuation wheel moves the jackscrew shaft, which moves the gate within the slot 76 of valve seat 40 between the open and closed positions as shown in FIGS. 2 and 3 .
- the seat 40 is advantageously held within the cavity 36 by a retainer plate 84 removably fastened to the housing 12 , otherwise, the considerable friction between the gate 78 and the sealing surfaces 72 and 74 (see FIG. 3 ) might remove the valve seat 40 from the cavity when the gate 78 is drawn away from the housing 12 .
- the actuator (jackscrew 82 ) may be engaged with both the valve closing member (gate 78 ) and the valve seat 40 to intentionally remove both the gate and the valve seat from the cavity 36 . This permits ready replacement of a worn valve seat without removing the valve 10 from the pipe elements 58 and 60 .
- Seat replacement may be effected by removing the retainer plate 84 to permit the valve seat 40 to move through the opening 38 in the segment 18 .
- Actuation of the jackscrew 82 to withdraw the gate 78 from the slot 76 may, instead, remove the valve seat 40 from cavity 36 provided that the friction between the gate and the valve seat is greater than the friction between the valve seat and the housing 12 .
- a strap 86 is positioned surrounding the valve seat 40 within the cavity 36 . Strap 86 may be attached to the gate 78 using, for example, bolts 88 to provide mechanical engagement permitting the valve seat 40 to be withdrawn from cavity 36 with the gate 78 using the actuator. As shown in FIG.
- the actuator, jackscrew 82 may be mounted on a pivot hinge 90 to permit pivoting motion of the gate 78 and valve seat 40 for ready access.
- the worn valve seat 40 may then be removed from the gate 78 by unbolting strap 86 , sliding the worn valve seat from the gate, sliding a new valve seat onto the gate, bolting the strap 86 to the gate, rotating the jackscrew 82 on pivot hinge 90 to align the gate and valve seat with opening 38 (see FIGS. 2 and 3 ), and then using the jackscrew to force the new valve seat into the cavity 36 .
- the gate 78 may be pivotably attached to the actuator, in this example, jackscrew 82 .
- FIG. 1 Still another embodiment is shown in FIG. 1 , wherein gate 78 is slidingly attached to the actuator (jackscrew 82 ) using a “Tee” coupling 92 which permits both the gate 78 and valve seat 40 to be removed as an assembly when they are drawn from the cavity 36 . The assembly slides along an axis perpendicular to flow axis 22 to permit rapid and convenient replacement of a worn valve seat.
- valve 94 shown in FIG. 7
- replacement of a worn valve seat 40 is further facilitated through the use of a sealing body 96 .
- Sealing body 96 permits replacement of the valve seat 40 without interrupting fluid flow to the valve 94 .
- Valve 94 has a second opening 98 positioned in the second segment 20 opposite to the first opening 38 .
- the second opening 98 provides access to cavity 36 , and allows the sealing body 96 to be removably attached to the valve seat 40 .
- the sealing body 96 comprises a rectangular block 100 having oppositely disposed sealing surfaces 102 and 104 . As shown in FIG.
- the sealing body 96 (block 100 in this example) is forced out of the cavity through the opening 98 in the segment 20 .
- the sealing body may then be disengaged from the new valve seat 40 .
- Temporary attachment of the valve seat 40 to the sealing body 98 may be effected through friction of contacting surfaces of interengaging parts, aligned holes and pins, spring biased detents, or dovetail joints for example. It may also be advantageous if the sealing body 96 comprises a plurality of interlocking portions 106 removably attachable to one another as shown in FIG. 9 .
- Portions 106 may be temporarily joined to one another using dovetail joints as shown, or using friction of contacting surfaces of interengaging parts, spring biased detents, and aligned holes and pins to cite a few examples.
- valve seat 108 can be formed from a plurality of independent piece parts that cooperate with one another.
- valve seat 108 comprises first and second piece parts 110 and 112 positionable within the cavity 36 of example valve embodiments 10 instead of seat 40 (see FIG. 2 ) and valve embodiment 94 (see FIG. 7 ).
- the first and second piece parts 110 , 112 comprise first and second sealing surfaces 114 and 116 oppositely disposed from one another and sealingly engageable with the housing 12 .
- the first and second piece parts 110 and 112 further comprise sealing surfaces 118 and 120 positioned in facing relation to one another and defining a slot 122 therebetween. The slot receives the gate 78 in sealing relation.
- a body 124 is rotatably mounted within a valve seat 126 , the body being rotatable about axis 128 between an open position, and a closed position sealingly engaging the valve seat 126 .
- the valve closing member comprises a disk 130 characteristic of the well-known “butterfly” valve.
- the valve seat 126 can be inserted into and removed from the cavity 36 of a housing 12 (see FIG. 1 ) through an opening 38 (see FIG. 2 ) as described above when the disk 130 is in the closed position.
- a second actuator (hand lever 132 for example) is mounted on the housing to rotate the disk 130 .
- the second actuator could be a motorized gear train, or other form of power actuation.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
- Valve Housings (AREA)
- Prostheses (AREA)
- Mechanically-Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
A valve has a housing defining an inlet and an outlet and a cavity therebetween which receives a valve seat. The valve seat defines a slot which receives a body rotatably mounted with in the valve seat. The valve seat is sealingly engaged with the housing, the body rotatably mounted with in the valve seat sealingly engages the valve seat and is rotatably movable between an open and a closed position using an actuator. An opening in the housing provides access to the cavity. The valve seat may be removed from the housing through the opening by attaching the valve seat to the body rotatably mounted with in the valve seat, thereby attaching the valve seat to the actuator, and withdrawing the body rotatably mounted with in the valve seat from the housing using the actuator.
Description
- This application is based upon and claims priority to U.S. application Ser. No. 14/270,564 filed May 6, 2014, which application is based upon and claims priority to U.S. Provisional Application No. 61/820,202, filed May 7, 2013 and U.S. Provisional Application No. 61/925,724 filed Jan. 10, 2014, all applications being hereby incorporated by reference herein.
- This invention concerns valves used in high wear environments.
- In hydraulic fluid handling valve applications there are many different fluid media to be considered, including, for example, water, various chemicals, as well as thick, highly abrasive fluids commonly called slurry. Slurries can have different levels of solid content as well as particle sizes. Because slurries have a higher level of solids content than typical hydraulic fluids, they present unique operational difficulties such as increased wear rate of piping and valves in systems transporting slurry.
- Because of the increased wear rate on components caused by the slurry, it is typical for systems transporting slurry to have predetermined maintenance schedules for the replacement of worn parts such as seals, valve seats, and other components subject to wear. Such maintenance usually requires shut down of the affected hydraulic lines and results in the loss of production.
- Typical valves used in slurry applications are pinch and knife gate valves which are designed specifically for the increased solid content of the fluid and the resultant greater wear on components. In order to service these types of valves it is necessary to remove either the entire valve or significant sections of pipe attached to the valve, resulting in increased down time of the production line and loss of associated revenue.
- There is a clearly a need for components, such as valves, that can be serviced in a faster and more efficient manner to reduce production down time and the concomitant loss of revenue.
- The invention concerns a valve. In one example embodiment, the valve comprises a housing having an inlet and an outlet. A cavity is positioned within the housing between the inlet and the outlet. A first opening in the housing provides access to the cavity. A valve seat is positioned within the cavity and sealingly engages the housing. The valve seat is insertable into and removable from the cavity through the first opening. A closing member comprising a body rotatably mounted within the valve seat, and the body is rotatably movable between the open and the closed positions. A first actuator is mounted on the housing and is engageable with the valve seat for removing the valve seat and the valve closing member from the cavity through the first opening. A second actuator is mounted on the housing engaged with the valve closing member for moving the valve closing member between the open and the closed positions. By way of example, the valve closing member in this embodiment comprises a disk.
- By way of example, the cavity may be defined by first and second walls positioned within the housing and oriented transversely to a flow axis extending from the inlet to the outlet. The first and second walls are in spaced relation to one another, each wall having a surface facing toward and sealingly engaged with the valve seat.
- In a particular example embodiment, the housing comprises a first segment defining the first opening and a second segment attached to the first segment. The first and second segments are attached to one another end to end and define the inlet and the outlet and a flow axis extending therebetween. Additionally by way of example, each of the first and second segments comprises first and second lugs projecting outwardly from opposite ends thereof. The lugs each have at least one hole for receiving a fastener for attaching the segments to one another.
- In a further example embodiment, each of the first and second segments comprises first and second arcuate projections positioned on opposite sides of the segments. The first and second arcuate projections surround the flow axis and extending radially there toward.
- Further by way of example, each of the first and second segments comprises first and second grooves positioned on opposite sides of the segments, each of the grooves facing the flow axis. First and second gaskets are respectively positioned within the first and second grooves. In one example embodiment, the first and second grooves extend over interfacing surfaces of the first and second lugs of the first and second segments. The first and second gaskets also extend along the first and second grooves in the lugs.
- In an example embodiment, the inlet has an inner diameter and the valve seat defines an aperture having an inner diameter smaller than the inner diameter of the inlet thereby defining a sealing surface facing the inlet. The sealing surface may comprise at least one projection extending toward the inlet. Further by way of example, the outlet may have an inner diameter and the valve seat may define an aperture having an inner diameter smaller than the inner diameter of the outlet thereby defining a sealing surface facing the outlet. In an example embodiment, the sealing surface comprises at least one projection extending toward the outlet.
-
FIG. 1 shows an isometric view of an example valve embodiment according to the invention; -
FIGS. 2 and 3 show longitudinal sectional views of a portion of the valve shown inFIG. 1 ; -
FIGS. 2A and 2B show portions of the valve ofFIG. 1 in isolation; -
FIG. 4 shows a cross sectional view taken at lines 4-4 ofFIG. 2 ; -
FIGS. 5 and 6 are isometric views showing example embodiments of portions of valves according to the invention; -
FIGS. 7-9 are partial sectional isometric views illustrating an example method of replacing a valve seat according to the invention; -
FIG. 10 is a partial isometric sectional view of an example embodiment of a valve seat according to the invention; and -
FIG. 11 is a partial isometric sectional view of an example embodiment of a valve seat and valve closing member according to the invention. -
FIG. 1 shows an example embodiment of avalve 10 according to the invention. Valve 10 comprises ahousing 12 having aninlet 14 and anoutlet 16.Housing 12 may be formed from a metal such as ductile iron, cast iron or steel, composites such as fiberglass, and polymers such as PVC (polyvinylchloride).Housing 12 comprises afirst segment 18 and asecond segment 20 attached to one another end to end and thereby define theinlet 14, theoutlet 16, and aflow axis 22 extending between them. In this example embodiment thesegments lugs 24 each having one or more alignedholes 26 that receivefasteners 28 for attaching the segments to one another. When used to connect grooved pipe elements (seeFIG. 2 ) the segments will have arcuate projections 30 (also known as “keys”) positioned onopposite sides segments arcuate projections 30 surround and face theflow axis 22 and extend radially toward it, allowing them to engage circumferential grooves within the pipe elements and provide mechanical engagement to retain the pipe elements to thevalve 10. - As shown in
FIG. 2 , acavity 36 is positioned within thehousing 12 between theinlet 14 and theoutlet 16. Afirst opening 38 within thefirst segment 18 provides access tocavity 36. Avalve seat 40 is positioned within thecavity 36.Valve seat 40 may be advantageously formed from a resilient, flexible material such as a rubber compound or urethane. The valve seat is insertable into thecavity 36 through the opening 38 and sealingly engages the housing. In this example embodiment, sealing engagement betweenseat 40 andhousing 12 is effected through contact between oppositely facingsurfaces second housing walls Walls flow axis 22 and are in spaced relation from one another to define thecavity 36. Upon insertion intocavity 36, thevalve seat 40 is compressed between thewalls projections 50 on thesurfaces valve seat 40 andhousing 12. -
Inlet 14 andoutlet 16 each have respectiveinner diameters aperture 52 defined by the valve seat. Together theinlet 14,outlet 16 andaperture 52 define theflow axis 22 through thevalve 10. In the example shown, theaperture 52 of thevalve seat 40 has aninner diameter 52 a less than the respectiveinner diameters inlet 14 and theoutlet 16. This difference in diameters creates two axial sealing surfaces, sealingsurface 54, which facesinlet 14, and sealingsurface 56, which facesoutlet 16. As shown in FIGS. 2 and 3, axial sealing surfaces 54 and 56 engage the ends ofpipe elements valve 10. Compression between the ends ofpipe elements arcuate projections 30 and the pipe element'scircumferential grooves 62.Axial projections 64 positioned respectively on the sealing surfaces 54 and 56 and extending respectively toward theinlet 14 andoutlet 16 may be used to ensure a uniform seal between thepipe elements seat 40. Additional or alternate sealing between thepipe elements gaskets 66 positioned inrespective grooves segments Grooves opposite sides flow axis 22.Gaskets 66 engage the segments and the pipe elements to effect a fluid tight seal therebetween. As shown inFIGS. 2A, 2B and 4 ,grooves gaskets 66 may also extend along the interfacing surfaces 24 a and 24 b oflugs 24. This seal configuration is shown inFIG. 2B in isolation to demonstrate how theseals 66 engage one another and form a complete sealing boundary to eliminate any potential leak paths betweensegments - As shown in
FIG. 3 ,valve seat 40 comprises first and second sealing surfaces 72 and 74 arranged spaced apart from one another in facing relation to define aslot 76. A valve closing member in the form of agate 78 is slidably movable withinslot 76 between a closed position (shown inFIG. 2 ) whereingate 78 sealingly engages the sealing surfaces 72 and 74 and obstructs flow through theaperture 52, and an open position (shown inFIG. 3 ) which permits flow between theinlet 14 andoutlet 16.Gate 78 may be made of metal, for example, steel, as well as composites such as fiberglass, as well as polymers such as HDPE (high density polyethylene).Gate 78 is in compressive engagement with sealingsurfaces gate 78 and thevalve seat 40, it is advantageous to positioncircumferential projections 80 on thesurfaces - Movement of
gate 78 is effected by an actuator, in this example a rising stem jackscrew 82 (seeFIG. 1 ) mounted on thefirst segment 18 of thehousing 12. Other types of actuators, such as pneumatic actuators, hydraulic actuators and electrical actuators, are also feasible. The shaft ofjackscrew 82 engages thegate 78 separately from thevalve seat 40, and rotation of the jackscrew's actuation wheel moves the jackscrew shaft, which moves the gate within theslot 76 ofvalve seat 40 between the open and closed positions as shown inFIGS. 2 and 3 . Theseat 40 is advantageously held within thecavity 36 by aretainer plate 84 removably fastened to thehousing 12, otherwise, the considerable friction between thegate 78 and the sealing surfaces 72 and 74 (seeFIG. 3 ) might remove thevalve seat 40 from the cavity when thegate 78 is drawn away from thehousing 12. However, the actuator (jackscrew 82) may be engaged with both the valve closing member (gate 78) and thevalve seat 40 to intentionally remove both the gate and the valve seat from thecavity 36. This permits ready replacement of a worn valve seat without removing thevalve 10 from thepipe elements retainer plate 84 to permit thevalve seat 40 to move through theopening 38 in thesegment 18. Actuation of the jackscrew 82 to withdraw thegate 78 from theslot 76 may, instead, remove thevalve seat 40 fromcavity 36 provided that the friction between the gate and the valve seat is greater than the friction between the valve seat and thehousing 12. However, it is advantageous to provide mechanical engagement between the actuator 82 and thevalve seat 40 to ensure removal as desired. To this end, as shown inFIGS. 1 and 4 , astrap 86 is positioned surrounding thevalve seat 40 within thecavity 36.Strap 86 may be attached to thegate 78 using, for example,bolts 88 to provide mechanical engagement permitting thevalve seat 40 to be withdrawn fromcavity 36 with thegate 78 using the actuator. As shown inFIG. 5 , to further facilitate valve seat replacement, the actuator,jackscrew 82, may be mounted on apivot hinge 90 to permit pivoting motion of thegate 78 andvalve seat 40 for ready access. Theworn valve seat 40 may then be removed from thegate 78 by unboltingstrap 86, sliding the worn valve seat from the gate, sliding a new valve seat onto the gate, bolting thestrap 86 to the gate, rotating the jackscrew 82 onpivot hinge 90 to align the gate and valve seat with opening 38 (seeFIGS. 2 and 3 ), and then using the jackscrew to force the new valve seat into thecavity 36. Once the valve seat is properly seated within thecavity 36 thebolts 88 may be removed and theretainer plate 84 may be reattached to thesegment 18. In another embodiment, shown inFIG. 6 , thegate 78 may be pivotably attached to the actuator, in this example,jackscrew 82. Still another embodiment is shown inFIG. 1 , whereingate 78 is slidingly attached to the actuator (jackscrew 82) using a “Tee”coupling 92 which permits both thegate 78 andvalve seat 40 to be removed as an assembly when they are drawn from thecavity 36. The assembly slides along an axis perpendicular to flowaxis 22 to permit rapid and convenient replacement of a worn valve seat. - In another
valve embodiment 94, shown inFIG. 7 , replacement of aworn valve seat 40 is further facilitated through the use of a sealingbody 96. Sealingbody 96 permits replacement of thevalve seat 40 without interrupting fluid flow to thevalve 94.Valve 94 has asecond opening 98 positioned in thesecond segment 20 opposite to thefirst opening 38. Thesecond opening 98 provides access tocavity 36, and allows the sealingbody 96 to be removably attached to thevalve seat 40. In this example embodiment, the sealingbody 96 comprises arectangular block 100 having oppositely disposed sealingsurfaces FIG. 8 , when the sealingbody 96 is temporarily attached to thevalve seat 40, and the valve seat is drawn out of thecavity 36 by theactuator 82 throughopening 38 in thefirst segment 18, the sealingbody 98 is drawn into thecavity 36 through thesecond opening 98 in thesecond segment 20. Sealing surfaces 102 and 104 of theblock 100 sealingly engage thehousing 12, namelywalls valve 94. Thevalve seat 40 is then released from the sealingbody 96, and may be replaced as described above, with the additional step of attaching thevalve seat 40 to the sealingbody 96. When thenew valve seat 40 is inserted into thecavity 36 throughopening 38 in thesegment 18 the sealing body 96 (block 100 in this example) is forced out of the cavity through theopening 98 in thesegment 20. The sealing body may then be disengaged from thenew valve seat 40. Temporary attachment of thevalve seat 40 to the sealingbody 98 may be effected through friction of contacting surfaces of interengaging parts, aligned holes and pins, spring biased detents, or dovetail joints for example. It may also be advantageous if the sealingbody 96 comprises a plurality of interlockingportions 106 removably attachable to one another as shown inFIG. 9 . This allows the sealing body to be assembled and drawn into the cavity 36 a portion at a time, and is useful when space is not available to accommodate a fullsized block 100 for example.Portions 106 may be temporarily joined to one another using dovetail joints as shown, or using friction of contacting surfaces of interengaging parts, spring biased detents, and aligned holes and pins to cite a few examples. - As shown in
FIG. 10 , avalve seat 108 can be formed from a plurality of independent piece parts that cooperate with one another. In this example,valve seat 108 comprises first andsecond piece parts cavity 36 ofexample valve embodiments 10 instead of seat 40 (seeFIG. 2 ) and valve embodiment 94 (seeFIG. 7 ). The first andsecond piece parts housing 12. The first andsecond piece parts comprise sealing surfaces slot 122 therebetween. The slot receives thegate 78 in sealing relation. - Although the example embodiments shown pertain to gate valves, the invention is also applicable to other types of valves. As shown in
FIG. 11 , abody 124 is rotatably mounted within a valve seat 126, the body being rotatable aboutaxis 128 between an open position, and a closed position sealingly engaging the valve seat 126. In this example the valve closing member comprises adisk 130 characteristic of the well-known “butterfly” valve. Likevalve seat 40 described above, the valve seat 126 can be inserted into and removed from thecavity 36 of a housing 12 (seeFIG. 1 ) through an opening 38 (seeFIG. 2 ) as described above when thedisk 130 is in the closed position. Because the valve closing member is actuated by rotation aboutaxis 128, the actuator (jackscrew 82) which is used to draw the valve seat 126 from the housing cannot also be used to actuate the valve. Therefore, a second actuator (hand lever 132 for example) is mounted on the housing to rotate thedisk 130. Although a simple hand lever is shown, the second actuator could be a motorized gear train, or other form of power actuation.
Claims (12)
1. A valve, comprising:
a housing having an inlet and an outlet;
a cavity positioned within said housing between said inlet and said outlet, a first opening in said housing providing access to said cavity;
a valve seat positioned within said cavity and sealingly engaging said housing, said valve seat being insertable into and removable from said cavity through said first opening;
a valve closing member comprising a body rotatably mounted within said valve seat, said body being rotatably movable between said open and said closed positions;
a first actuator mounted on said housing and engageable with said valve seat for removing said valve seat and said valve closing member from said cavity through said first opening;
a second actuator mounted on said housing, said second actuator being engaged with said valve closing member for moving said valve closing member between said open and said closed positions.
2. The valve according to claim 1 , wherein said valve closing member comprises a disk.
3. The valve according to claim 1 , wherein said cavity is defined by first and second walls positioned within said housing and oriented transversely to a flow axis extending from said inlet to said outlet, said first and second walls being in spaced relation to one another, each said wall having a surface facing toward and sealingly engaged with said valve seat.
4. The valve according to claim 1 , wherein said housing comprises a first segment defining said first opening and a second segment attached to said first segment, said first and second segments being attached to one another end to end and defining said inlet and said outlet and a flow axis extending therebetween.
5. The valve according to claim 4 , wherein each of said first and second segments comprises first and second arcuate projections positioned on opposite sides of said segments, said first and second arcuate projections surrounding said flow axis and extending radially there toward.
6. The valve according to claim 4 , wherein each of said first and second segments comprises first and second lugs projecting outwardly from opposite ends thereof, said lugs each having at least one hole for receiving a fastener for attaching said segments to one another.
7. The valve according to claim 6 , wherein each of said first and second segments comprises:
first and second grooves positioned on opposite sides of said segments, each of said grooves facing said flow axis;
first and second gaskets respectively positioned within said first and second grooves.
8. The valve according to claim 7 , wherein said first and second grooves extend over interfacing surfaces of said first and second lugs of said first and second segments, said first and second gaskets extending along said first and second grooves in said first and second lugs.
9. The valve according to claim 4 , wherein:
said inlet has an inner diameter;
said valve seat defines an aperture having an inner diameter smaller than said inner diameter of said inlet thereby defining a sealing surface facing said inlet.
10. The valve according to claim 9 , wherein said sealing surface comprises at least one projection extending toward said inlet.
11. The valve according to claim 4 , wherein:
said outlet has an inner diameter;
said valve seat defines an aperture having an inner diameter smaller than said inner diameter of said outlet thereby defining a sealing surface facing said outlet.
12. The valve according to claim 11 , wherein said sealing surface comprises at least one projection extending toward said outlet.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US16/006,246 US20180292014A1 (en) | 2013-05-07 | 2018-06-12 | Valve With Removable Seat |
US16/749,099 US10890261B2 (en) | 2013-05-07 | 2020-01-22 | Valve with removable seat |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US201361820202P | 2013-05-07 | 2013-05-07 | |
US201461925724P | 2014-01-10 | 2014-01-10 | |
US14/270,564 US10502324B2 (en) | 2013-05-07 | 2014-05-06 | Valve with removable seat |
US16/006,246 US20180292014A1 (en) | 2013-05-07 | 2018-06-12 | Valve With Removable Seat |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/270,564 Division US10502324B2 (en) | 2013-05-07 | 2014-05-06 | Valve with removable seat |
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US16/749,099 Continuation US10890261B2 (en) | 2013-05-07 | 2020-01-22 | Valve with removable seat |
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US20180292014A1 true US20180292014A1 (en) | 2018-10-11 |
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US16/006,246 Abandoned US20180292014A1 (en) | 2013-05-07 | 2018-06-12 | Valve With Removable Seat |
US16/749,099 Active US10890261B2 (en) | 2013-05-07 | 2020-01-22 | Valve with removable seat |
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US14/270,564 Active US10502324B2 (en) | 2013-05-07 | 2014-05-06 | Valve with removable seat |
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US16/749,099 Active US10890261B2 (en) | 2013-05-07 | 2020-01-22 | Valve with removable seat |
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US (3) | US10502324B2 (en) |
EP (1) | EP2994673B1 (en) |
JP (4) | JP6718812B2 (en) |
KR (2) | KR102226705B1 (en) |
CN (1) | CN105324597B (en) |
AU (1) | AU2014262923B2 (en) |
BR (1) | BR112015027838B1 (en) |
CA (1) | CA2911513C (en) |
ES (1) | ES2665607T3 (en) |
HK (1) | HK1216770A1 (en) |
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PE (2) | PE20151827A1 (en) |
PL (1) | PL2994673T3 (en) |
TR (1) | TR201802763T4 (en) |
WO (1) | WO2014182664A1 (en) |
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