CA1134244A - High pressure fluid end block and valve assembly - Google Patents
High pressure fluid end block and valve assemblyInfo
- Publication number
- CA1134244A CA1134244A CA362,973A CA362973A CA1134244A CA 1134244 A CA1134244 A CA 1134244A CA 362973 A CA362973 A CA 362973A CA 1134244 A CA1134244 A CA 1134244A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- seat
- discharge
- annular
- block member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Lift Valve (AREA)
Abstract
ABSTRACT
HIGH PRESSURE FLUID END BLOCK
AND VALVE ASSEMBLY
A fluid end block and valve assembly for a high pressure reciprocating pump. The assembly comprises a block member having a first passageway therein for operatively accommodating a reciprocating piston, the first passageway being in communication with a suction surface of the block member through a stepped counter-bore configuration in the block member, a second pas-sageway in the block member extending transversely from the first passageway to a discharge surface of the block member, a suction manifold removably mounted on the block member at the suction surface, a discharge manifold removably mounted on the block member at the discharge surface, the discharge manifold having a discharge channel to lead fluid being pumped from the second passageway to a discharge passage of the manifold, and having a stepped counterbore configuration in the dis charge channel. The assembly further includes a suc-tion valve assembly removably clamped in position between the suction manifold and the block member, and a discharge valve assembly removably clamped in position between the discharge manifold and the block member, each valve assem-bly comprising an annular seat member, a valve keeper en gaged with the annular member, a valve plug housed within the assembly, and bias means to bias the valve plug into a closed position. Each annular seat member has a flow channel extending therethrough from a base face at one end to a seat face at the opposed end, and has an annular valve seat. Each valve plug has a seating face to coop-erate with the annular valve seat, and has a stem. Each valve keeper has a guide to cooperate with the stem to guide movement of the valve plug, has an opening to promote fluid flow through the keeper, and has a stepped outer configuration provided by a body portion and a radially extending flange extending radially outwardly from the body portion to define a base seat which seats on the seat face of one annular seat member. The stepped outer configuration of each valve keeper is complementary to one stepped counterbore configuration for one valve assembly to be located in the stepped counterbore con-figuration of the block member and for the other valve assembly to be located in the stepped counterbore con-figuration of the discharge manifold with the base seat of each keeper being clamped between an annular surface in one counterbore configuration and the seat face of one annular seat member by the clamping action of the manifolds. Sealing means is provided between the block member and the valve assemblies, and between the valve assemblies and the manifolds.
HIGH PRESSURE FLUID END BLOCK
AND VALVE ASSEMBLY
A fluid end block and valve assembly for a high pressure reciprocating pump. The assembly comprises a block member having a first passageway therein for operatively accommodating a reciprocating piston, the first passageway being in communication with a suction surface of the block member through a stepped counter-bore configuration in the block member, a second pas-sageway in the block member extending transversely from the first passageway to a discharge surface of the block member, a suction manifold removably mounted on the block member at the suction surface, a discharge manifold removably mounted on the block member at the discharge surface, the discharge manifold having a discharge channel to lead fluid being pumped from the second passageway to a discharge passage of the manifold, and having a stepped counterbore configuration in the dis charge channel. The assembly further includes a suc-tion valve assembly removably clamped in position between the suction manifold and the block member, and a discharge valve assembly removably clamped in position between the discharge manifold and the block member, each valve assem-bly comprising an annular seat member, a valve keeper en gaged with the annular member, a valve plug housed within the assembly, and bias means to bias the valve plug into a closed position. Each annular seat member has a flow channel extending therethrough from a base face at one end to a seat face at the opposed end, and has an annular valve seat. Each valve plug has a seating face to coop-erate with the annular valve seat, and has a stem. Each valve keeper has a guide to cooperate with the stem to guide movement of the valve plug, has an opening to promote fluid flow through the keeper, and has a stepped outer configuration provided by a body portion and a radially extending flange extending radially outwardly from the body portion to define a base seat which seats on the seat face of one annular seat member. The stepped outer configuration of each valve keeper is complementary to one stepped counterbore configuration for one valve assembly to be located in the stepped counterbore con-figuration of the block member and for the other valve assembly to be located in the stepped counterbore con-figuration of the discharge manifold with the base seat of each keeper being clamped between an annular surface in one counterbore configuration and the seat face of one annular seat member by the clamping action of the manifolds. Sealing means is provided between the block member and the valve assemblies, and between the valve assemblies and the manifolds.
Description
AND VALVE ASSEMBLY
The invention relates to a fluid end block and valve assembly for a high pressure reciprocating pump.
Description of the Prior Art The prior art includes many arrangements for high pressure reciprocating pumps wherein a fluid block is provided with suction and discharge passages and appro-priate valving means in each such that the action of a reciprocating plunger causes fluid to be sucked into the fluid block from a suction manifold and subsequently discharged from the fluid block through a discharqe manifold.
All pump configurations are subject to a variety of stresses and pressures which affect the efficiency of the pump and reduce the life expectancy of its com-ponents. Typically, conventional high pressure recipro-cating pumps have used tapered valve seat configurations which result in hoop stresses due to the driving of the valve into this tapered seat arrangement. Other config-urations involve fluid end blocks having numerous and ~: :
. . ,:: l -, . . .
intricate passageways resulting in more complex stress concentrations. Inasmuch as the fluid end blocks have a shorter life expectancy than other components of the reciprocating pump, complex designs are more expensive to utilize.
Valve assemblies utilized in high pressure recipro-cating pumps may typically be complicated or cumbersome and difficult to reach or replace should an element of that assembly fail. In particular, valve bodies or plugs are frequently cumbrous in tha~ they feature stems or wings which protrude into the flow passages of the valve seat which may reduce the efficiency of the valv-ing operation. These "features" on valve bodies also increase the size and weight of the valve body and of the valve assembly, resulting in higher inertial forces and decreased efficiency.
Therefore, the art has a n~ed for less complex, longer lasting, and more efficient fluid end block and valve assemblies for high pressure reciprocating pumps.
According to this invention there is provided a fluid end block and valve assembly for a high pres-sure reciprocating pump, comprising:
a block member having a first passageway therein for operatively accommodating a reciprocating piston, the first passage-way being in communication with a suction surface of the block member through a stepped counterbore configuration in the block member;
~3~
a second passageway in the block member ex-tending from the first passageway to a discharge surface of the block member;
a suction manifold removably mounted on the block member at the suction surface, the suction manifold having a suction passage and having a suction channel to lead fluid being pumped from the suction passage to the first passageway;
a discharge manifold removably mounted on the block member at the discharge surface, the discharge manifold having a discharge passage, having a discharge channel to lead fluid being pumped from the second passageway to the discharge passage, and having a stepped counterbore configuration in the discharge channel;
a suction valve assembly removably clamped in position between the suction manifold and the block member, and a discharge valve assembly removably clamped in position between the discharge manifold and the block member;
each valve assembly comprising an annular seat member, a valve keeper engaged:with the annular seat member, a valve plug housed within the assembly, and bias means to bias the valve plug into a closed position;
:. .
`
`. ` .~
each annular seat member having a circumferen-tial outer wall, having a flow channel extending from a base face at one end to a seat face at the opposed end, and having an annular valve seat around the flow channel;
each valve plug having a seating face to coop-erate with one annular valve seat, and having a stem;
each valve keeper having a guide to cooperate with the stem to guide movement of the valve plug relatively to the annular valve seat, each valve keeper having an opening to permit fluid flow through the keeper, and each valve keeper having a stepped outer configuration provided by a body portion and a radially extending flange extending radially outwardly from the body portion to define a base seat which seats on the seat face of one annular seat member, each stepped outer configuration being com-plementary to one stepped counterbore con-figuration for one valve assembly to be located in the stepped counterbore configu-ration of the block member and for the other valve assembly to be located in the stepped : :
counterbore configuration of the disc~harge manifold with the base:seat of each keeper being clamped between an annular surface: :
in one counterbore configuration and the seat face of one annular seat member~by the clamping action of the~manlfolds: and sealing means between the block member and the valve assemblies, and between the valYe assemblies and the manifolds.
In a preferred embodiment of the invention each annular valve seat is a bevelled surface which diverges outwardly from the flow channel on the seat face side of each annular seat member, and each valve plug has a complementary frustoconical seating face. This preferred embodiment provides the advantage that hoop stresses are reduced.
In an embodiment of the invention the sealing means may include a circumferen~ial seal provided in a circum-ferential groove in the circumferential outer wall of each annular seat member, each circumferential seal engaging sealingly with walls defining the first coun-terbore.
~0 In a preferred example of this embodiment each circumferential groove is positioned to extend into the seat face for each circumferential seal to additionally engage sealingly with the base seat of one valve keeper.
In this example of the invention the circumferential seal may conveniently be in the form of a Parker Polypack seal. This arrangement combines the advantages of lip-type seals and squeeze-type seals to produce an effective sealing under vacuum conditions and lowj medium, and extreme pressures. This particular seal also has a longer seal life, thereby enhancing the efficiency of operation of a pump utilizing such seals by reducing the frequency with which the seals must be reploced.
-~3~
The sealing means may further include an O-ring provided in an annular groove in the base face of each annular seat member.
The suction manifold may have a recess within which the base face of one annular seat member is located, and the block member may have a recess in its discharge surface within which the base face of the other annular seat member is located.
In an embodiment of the invention the second pas-sageway may extend transversely to the first passage-way, and the counterbore configuration of the block member may be concentric with the first passageway.
In a preferred embodiment of the invention the suction and discharge valve assemblies will corres-pond, and the counterbore configurations of the block member and the discharge manifold will also correspond.
Thus the suction and discharge valve assemblies can be used interchangeably.
The fluid end block and valve assembly of this invention may include a plurality of first passageways, a plurality of second passageways, a reciprocating pis-ton operatively located in each first passageway, a suction valve assembly cooperating with each first pas-sageway, a discharge valve assembly cooperating with each second passageway, a suction manifold having a plurality of suction channels clamping the suction valve assemblies in position, and a discharge manlfold having a plurality of discharge channels clamping the discharge valve assem-blies in position.
Alternatively, if desired, a plurality of suction manifolds and a plurality of discharge manifolds may be employed for each suction manifold to cooperate with one valve assembly, and for each discharge manifold to cooperate with one valve assembly.
The preferred embodiment of the fluid end block and valve assembly of the present invention, when com-pared with the prior art, has the advantages of ease of installation and removal of its valve assemblies, the reduction of stress concentrations, and in particular of hoop stresses due to tapered valve seat configurations, and fewer and lighter weight components, hence producing a more efficiently operating pump having an increased life expectancy for its fluid end block.
In addition the valve assemblies, by being snugly located in the complementary counterbore configurations, are located positively both in their axial and lateral directions. At the same time the annular seat member of each valve assembly is firmly clamped against the valve keeper of the assembly.
Because each valve keeper has a stepped outer con-figuration which is complementary to the counterboreconfigurations, each valve keeper is positively clamped in position with its base seat bearing against the annular surface between the first and second counterbores. The remainder of each valve keeper can therefore be shaped to effectively guide movement of the valve plug and allow free flow of fluid therethrough since it is not required to participate in the clamping action.
,. . . -~, . . . , : ~
~3~
This arrangement provides the particular advan-tage that a valve assembly can readily be located in position, and can then readily be removed for repair or replacement, when required.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-sectional view of the fluid end block and valve assembly of the present invention;
FIG. 2 is an enlarged cross-sectional view of the valve assembly of the present invention; and FIG. 3 is a sectional view of a fluid end block and valve assembly of the present invention which illustrates the use of a~single discharge manifold for a fluid end block having a multiplicity of suction and discharge passageways.
While the invention will be described in connection with the preferred embodiment, it will be understood that it is not intended to limit the invention to that embodiment. On the contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, a cross sectional view is~shown of the fluid end block and valve assembly 10 of~the pr~esent invention. A block member 12 is provided with ~at~least one first passageway 14 and at least one second passage-way 16. First passageway 14 extends rom a suction :~
~3~
g surface 13 of the block member to a stuffing box 20 integrally formed in the block member 12. The details of stuffing box 20 are not shown, as they are conven-tional and would be apparent to those of ordinary skill in the art. The second passageway 16 extends substan-tially perpendicularly from the first passageway 14 to discharge surface 15 o the block member. All internal corners and angles of the passageways dis-posed in the blocX member 12 are rounded or chamfered to reduce the possibility of fatigue fractures in those areas due to high concentration of stresses.
A reciprocating plunger or piston 18 is slidably arranged within the first passageway 14 for the pur-pose of sucking fluid into the first passageway 14 andfor expelling fluid out the second passageway 16. The reciprocating plunger is driven by a means situated outside block member 12, which means is conventional and is not shown in the drawings.
The first passageway 14 is provided with a counter-bore configuration comprising a first counterbore 24 and a second counterbore 25, which counterbores are both con-centric with the passageway 14. A suction valve assembly 22 is disposed in the first and second counterbores 24 and 25. The suction valve assembly 22 is comprised of the same elements and is of the same configuration as a discharge valve assembly 90. Each valve assembly includes a valve plug 28, an annular seat member 34, a valve keeper 54 engaged with the seat member 34, a valve plug biasing means 60, and seals 50 and 52.
.; ,~ , ''. ' ; ' ' . '"':
~3`~
--- o--As can be seen more specifically in Figure 2 of the drawings, the valve plug 28 is provided with a frustoconical seating face which surrounds a flat head surface 30. The surface 30 faces a valve flow channel 48 which extends through the annular seat member 34, so that the flat head surface 30 is in the direct path of the flow of fluid through the valve assembly, It is believed that this frustoconical valve plug with a flat head surface will provide for more efficient operation of the valve assembly.
Each annular seat member 34 has a circumferen-tial outer wall, has the flow channel 48 extending through it from a base face 38 at one end to a seat lS face 44 at the opposed end, and has an annular valve seat 42 around the flow channel 48 for engaging sealingly with the frustoconical seating face of the valve plug 28.
Each annular valve seat is a bevelled surface which diverges outwardly from the flow channel 48 on the seat face 44 side of each annular seat member 34.
The valve plug 28 has a rearwardly extending stem 32 for use in guiding displacement of the plug 28 between its closed position [Figure 2] where the seating face of the plug engages sealingly with the bevelled surface 42 of the annular valve seat, and its open position where the valve plug is spaced from the annular valve seat to permit flow through the valve assembly.
-.. ...
-- : : ,:: .- - ~. . . . ....
,. . . . , . , ,., .. ~ , ,.
The bias means, in the form of a helical spring 60, is operative between a rear surface 29 of the valve plug 28 and the valve keeper 54 ~o bias the valve plug 28 into its closed position.
Each valve keeper 54 has a guide 64 to cooper-ate with the stem 32 to guide movement of the valve plug 28 relatively to the annular valve seat. Each valve keeper 54 has an opening 58 to permit fluid to flow through the valve keeper 54. Each valve keeper 54 further has a stepped outer configuration provided by a main body portion and by a radially extending flange which extends radially outwardly from the body portion to define a base seat 56 which seats on the seat face 44 of the annular seat member 34.
The circumferential outer surface of each annu-lar seat member 34 is provided with a circumferential recess or groove 36 which is positioned to open into the seat face 44. A circumferential seal 50 is located in the recess 36 to engage sealingly with the base seat 56 as well as with the counterbore walls within which the valve assembly is located, as is hereinafter described.
The circumferential seal 50 consists of a Parker PolyPak device. In the case of the suction valve assembly 22, the seal 50 acts between the seat member 34 and the first counterbore 24 in the block member 12.
The base face 38 of valve seat member 34 is provided with an annular groove 46 which surrounds the channel opening ~8 of the valve assembly. The seal 52, in the form of an O-ring is located in the ~3~
-12~
annular groove 46. For the suction valve assembly 22, this seal 52 acts between the valve seat member 34 and an abutting face 72 of a suction manifold 66.
As shown in FIG. 1, the valve seat member 34 is received in a shallow recess 26 in the suction manifold 66.
The valve keeper 54 has a stepped outer con-figuration which is complementary to the counterbore configuration provided by the first and second counterbores 24 and 25 in the first passage 14 in the block member 12. The valve keeper 54 is therefore positively located in position, as shown particularly in Figure 2, in the counterbore configuration with its base seat 56 bearing against the annular surface between the first and second counterbores 24 and 25.
The base seat is located in this position by the annular seat member 34 having its seat face 44 bear-ing against the base seat, and by the circumferential seal 50 being sealingly compressed in the recess be-tween the base seat 56 and the annular wall defining the first counterbore 24.
Since the main body portion of the valve keeper 54 is not employed for the purpose of locating the valve assembly in position within the counterbore configura-tion of the block member 12, the valve keeper ls shaped to guide displacement of the valve plug 28, and to allow free flow of fluid through the side opening 58 without the arrangement of these feat~res being dictated by any need to utilize the main body portion of the valve keeper for locating the valve assembly in position.
~34~
With the specific construction of the valve assembly 22, where the plug 28 has a stem 32 which is guided by means of the guide 64 of the valve keeper 54, the need for a stem or wing which protrudes from the surface 30 of the valve plug 28 and thus into the flow channel 48, is eliminated. This, therefore, avoids such a stem or wing which protrudes into the flow channel 48 and which would, therefore, reduce the efficiency of operation of such a valve.
As will be apparent from Figure 2, the valve keeper 54 includes a recess 62 within which one end of the bias spring 60 is received and located.
Returning now to FIG. 1, it will be seen that the suction manifold 66, having a main suction pass-age 68, is disposed in abutment with the base face 38 of the seat member 34 so that passage 68 communi-cates with first passageway 14 by means of a suction channel 70 and the flow channel 48. Suction manifold 66 is secured to block member 12 by bolts 74 which extend through the suction manifold and into corres-ponding bores 76 of block member 12. Pursuant to this arrangement, the suction valve assembly 22 is clamped into position, thus eliminating the need for a tapered valve seat configuration and avoiding the hoop stresses which are induced thereby.
As previously noted, the arrangement of the dis-charge valve assembly 90 is essentially the same as has been described for the suction valve assembly.
However, in this aspect of the invention, the dis-charge valve assembly is disposed in a counterbore 84 in a discharge manifold 78. Counterbore 84 is con-centric with a discharge manifold inlet channel 88 . .- :. , ~ .,, : -- . ,: . .
~L3~
which communicates with a discharge manifold main passage 80. The counterbore 84 of the discharge manifold together with the inlet channel 88 corresponds with the counterbore configuration of the block member at the suction surface 13, so that the suction valve assembly 22 and the discharge valve assembly 90 are interchangeable. In the discharge valve assembly 90, the circumferential seal 50 of that assembly acts between the seat member 34 and the manifold counterbore 84.
A portion of the base of the seat member is received in a shallow recess 82 of the block member 12. Pursuant to this arrangement, a groove seal 52 acts between the base face of the seat member 34 and the block surface in the shallow recess 82.
Discharge manifo1d 78 is also secured to block member 12 by bolts 74, which extend through the discharge mani-fold and into corresponding bores 76 of the block member 12. Again, this arrangement secures the discharge valve assembly in place between the discharge manifold and the blocX member.
As shown in FIG. 3, the preferred embodiment of the present invention would have a multiplicity of first passageways 14 and corresponding second passageways 16 arranged in alignment within a block member 12 such that a single suction manifold and a single discharge manifold would secure and accommodate all suction valve assemblies and discharge valve assemblies respectively.
The foregoing description of the invention has been directed primarily part to a particular pre~erred embodi-ment in accordance with the requirements of the Patent - . .. .. .. .. .... ......... . . ....... . ... .. ..
,, "" j," ,j ", : . . .. . . .. ,. , :.. i . .. . . . . .
~L~3~
Statutes and for purpose of explanation and illustration.
It will be apparent, however, to those skilled in this art that many modifications and changes in this specific apparatus may be made without departing from the scope and spirit of the invention. For example, other configura-tions of the valve assembly elements may be utilized and, in particular, a valve plug stem might be structured such that the fluid could flow through spaces between the stem 32 and the stem guide 64, and thereby eliminate the need for the side opening 58 in valve keeper member 54.
It is applicant's intention in the following claims to cover such modifications and variations as fall within the true spirit and scope of the invention.
: . : ~ . :: ,, , :, ; , ,
The invention relates to a fluid end block and valve assembly for a high pressure reciprocating pump.
Description of the Prior Art The prior art includes many arrangements for high pressure reciprocating pumps wherein a fluid block is provided with suction and discharge passages and appro-priate valving means in each such that the action of a reciprocating plunger causes fluid to be sucked into the fluid block from a suction manifold and subsequently discharged from the fluid block through a discharqe manifold.
All pump configurations are subject to a variety of stresses and pressures which affect the efficiency of the pump and reduce the life expectancy of its com-ponents. Typically, conventional high pressure recipro-cating pumps have used tapered valve seat configurations which result in hoop stresses due to the driving of the valve into this tapered seat arrangement. Other config-urations involve fluid end blocks having numerous and ~: :
. . ,:: l -, . . .
intricate passageways resulting in more complex stress concentrations. Inasmuch as the fluid end blocks have a shorter life expectancy than other components of the reciprocating pump, complex designs are more expensive to utilize.
Valve assemblies utilized in high pressure recipro-cating pumps may typically be complicated or cumbersome and difficult to reach or replace should an element of that assembly fail. In particular, valve bodies or plugs are frequently cumbrous in tha~ they feature stems or wings which protrude into the flow passages of the valve seat which may reduce the efficiency of the valv-ing operation. These "features" on valve bodies also increase the size and weight of the valve body and of the valve assembly, resulting in higher inertial forces and decreased efficiency.
Therefore, the art has a n~ed for less complex, longer lasting, and more efficient fluid end block and valve assemblies for high pressure reciprocating pumps.
According to this invention there is provided a fluid end block and valve assembly for a high pres-sure reciprocating pump, comprising:
a block member having a first passageway therein for operatively accommodating a reciprocating piston, the first passage-way being in communication with a suction surface of the block member through a stepped counterbore configuration in the block member;
~3~
a second passageway in the block member ex-tending from the first passageway to a discharge surface of the block member;
a suction manifold removably mounted on the block member at the suction surface, the suction manifold having a suction passage and having a suction channel to lead fluid being pumped from the suction passage to the first passageway;
a discharge manifold removably mounted on the block member at the discharge surface, the discharge manifold having a discharge passage, having a discharge channel to lead fluid being pumped from the second passageway to the discharge passage, and having a stepped counterbore configuration in the discharge channel;
a suction valve assembly removably clamped in position between the suction manifold and the block member, and a discharge valve assembly removably clamped in position between the discharge manifold and the block member;
each valve assembly comprising an annular seat member, a valve keeper engaged:with the annular seat member, a valve plug housed within the assembly, and bias means to bias the valve plug into a closed position;
:. .
`
`. ` .~
each annular seat member having a circumferen-tial outer wall, having a flow channel extending from a base face at one end to a seat face at the opposed end, and having an annular valve seat around the flow channel;
each valve plug having a seating face to coop-erate with one annular valve seat, and having a stem;
each valve keeper having a guide to cooperate with the stem to guide movement of the valve plug relatively to the annular valve seat, each valve keeper having an opening to permit fluid flow through the keeper, and each valve keeper having a stepped outer configuration provided by a body portion and a radially extending flange extending radially outwardly from the body portion to define a base seat which seats on the seat face of one annular seat member, each stepped outer configuration being com-plementary to one stepped counterbore con-figuration for one valve assembly to be located in the stepped counterbore configu-ration of the block member and for the other valve assembly to be located in the stepped : :
counterbore configuration of the disc~harge manifold with the base:seat of each keeper being clamped between an annular surface: :
in one counterbore configuration and the seat face of one annular seat member~by the clamping action of the~manlfolds: and sealing means between the block member and the valve assemblies, and between the valYe assemblies and the manifolds.
In a preferred embodiment of the invention each annular valve seat is a bevelled surface which diverges outwardly from the flow channel on the seat face side of each annular seat member, and each valve plug has a complementary frustoconical seating face. This preferred embodiment provides the advantage that hoop stresses are reduced.
In an embodiment of the invention the sealing means may include a circumferen~ial seal provided in a circum-ferential groove in the circumferential outer wall of each annular seat member, each circumferential seal engaging sealingly with walls defining the first coun-terbore.
~0 In a preferred example of this embodiment each circumferential groove is positioned to extend into the seat face for each circumferential seal to additionally engage sealingly with the base seat of one valve keeper.
In this example of the invention the circumferential seal may conveniently be in the form of a Parker Polypack seal. This arrangement combines the advantages of lip-type seals and squeeze-type seals to produce an effective sealing under vacuum conditions and lowj medium, and extreme pressures. This particular seal also has a longer seal life, thereby enhancing the efficiency of operation of a pump utilizing such seals by reducing the frequency with which the seals must be reploced.
-~3~
The sealing means may further include an O-ring provided in an annular groove in the base face of each annular seat member.
The suction manifold may have a recess within which the base face of one annular seat member is located, and the block member may have a recess in its discharge surface within which the base face of the other annular seat member is located.
In an embodiment of the invention the second pas-sageway may extend transversely to the first passage-way, and the counterbore configuration of the block member may be concentric with the first passageway.
In a preferred embodiment of the invention the suction and discharge valve assemblies will corres-pond, and the counterbore configurations of the block member and the discharge manifold will also correspond.
Thus the suction and discharge valve assemblies can be used interchangeably.
The fluid end block and valve assembly of this invention may include a plurality of first passageways, a plurality of second passageways, a reciprocating pis-ton operatively located in each first passageway, a suction valve assembly cooperating with each first pas-sageway, a discharge valve assembly cooperating with each second passageway, a suction manifold having a plurality of suction channels clamping the suction valve assemblies in position, and a discharge manlfold having a plurality of discharge channels clamping the discharge valve assem-blies in position.
Alternatively, if desired, a plurality of suction manifolds and a plurality of discharge manifolds may be employed for each suction manifold to cooperate with one valve assembly, and for each discharge manifold to cooperate with one valve assembly.
The preferred embodiment of the fluid end block and valve assembly of the present invention, when com-pared with the prior art, has the advantages of ease of installation and removal of its valve assemblies, the reduction of stress concentrations, and in particular of hoop stresses due to tapered valve seat configurations, and fewer and lighter weight components, hence producing a more efficiently operating pump having an increased life expectancy for its fluid end block.
In addition the valve assemblies, by being snugly located in the complementary counterbore configurations, are located positively both in their axial and lateral directions. At the same time the annular seat member of each valve assembly is firmly clamped against the valve keeper of the assembly.
Because each valve keeper has a stepped outer con-figuration which is complementary to the counterboreconfigurations, each valve keeper is positively clamped in position with its base seat bearing against the annular surface between the first and second counterbores. The remainder of each valve keeper can therefore be shaped to effectively guide movement of the valve plug and allow free flow of fluid therethrough since it is not required to participate in the clamping action.
,. . . -~, . . . , : ~
~3~
This arrangement provides the particular advan-tage that a valve assembly can readily be located in position, and can then readily be removed for repair or replacement, when required.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-sectional view of the fluid end block and valve assembly of the present invention;
FIG. 2 is an enlarged cross-sectional view of the valve assembly of the present invention; and FIG. 3 is a sectional view of a fluid end block and valve assembly of the present invention which illustrates the use of a~single discharge manifold for a fluid end block having a multiplicity of suction and discharge passageways.
While the invention will be described in connection with the preferred embodiment, it will be understood that it is not intended to limit the invention to that embodiment. On the contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, a cross sectional view is~shown of the fluid end block and valve assembly 10 of~the pr~esent invention. A block member 12 is provided with ~at~least one first passageway 14 and at least one second passage-way 16. First passageway 14 extends rom a suction :~
~3~
g surface 13 of the block member to a stuffing box 20 integrally formed in the block member 12. The details of stuffing box 20 are not shown, as they are conven-tional and would be apparent to those of ordinary skill in the art. The second passageway 16 extends substan-tially perpendicularly from the first passageway 14 to discharge surface 15 o the block member. All internal corners and angles of the passageways dis-posed in the blocX member 12 are rounded or chamfered to reduce the possibility of fatigue fractures in those areas due to high concentration of stresses.
A reciprocating plunger or piston 18 is slidably arranged within the first passageway 14 for the pur-pose of sucking fluid into the first passageway 14 andfor expelling fluid out the second passageway 16. The reciprocating plunger is driven by a means situated outside block member 12, which means is conventional and is not shown in the drawings.
The first passageway 14 is provided with a counter-bore configuration comprising a first counterbore 24 and a second counterbore 25, which counterbores are both con-centric with the passageway 14. A suction valve assembly 22 is disposed in the first and second counterbores 24 and 25. The suction valve assembly 22 is comprised of the same elements and is of the same configuration as a discharge valve assembly 90. Each valve assembly includes a valve plug 28, an annular seat member 34, a valve keeper 54 engaged with the seat member 34, a valve plug biasing means 60, and seals 50 and 52.
.; ,~ , ''. ' ; ' ' . '"':
~3`~
--- o--As can be seen more specifically in Figure 2 of the drawings, the valve plug 28 is provided with a frustoconical seating face which surrounds a flat head surface 30. The surface 30 faces a valve flow channel 48 which extends through the annular seat member 34, so that the flat head surface 30 is in the direct path of the flow of fluid through the valve assembly, It is believed that this frustoconical valve plug with a flat head surface will provide for more efficient operation of the valve assembly.
Each annular seat member 34 has a circumferen-tial outer wall, has the flow channel 48 extending through it from a base face 38 at one end to a seat lS face 44 at the opposed end, and has an annular valve seat 42 around the flow channel 48 for engaging sealingly with the frustoconical seating face of the valve plug 28.
Each annular valve seat is a bevelled surface which diverges outwardly from the flow channel 48 on the seat face 44 side of each annular seat member 34.
The valve plug 28 has a rearwardly extending stem 32 for use in guiding displacement of the plug 28 between its closed position [Figure 2] where the seating face of the plug engages sealingly with the bevelled surface 42 of the annular valve seat, and its open position where the valve plug is spaced from the annular valve seat to permit flow through the valve assembly.
-.. ...
-- : : ,:: .- - ~. . . . ....
,. . . . , . , ,., .. ~ , ,.
The bias means, in the form of a helical spring 60, is operative between a rear surface 29 of the valve plug 28 and the valve keeper 54 ~o bias the valve plug 28 into its closed position.
Each valve keeper 54 has a guide 64 to cooper-ate with the stem 32 to guide movement of the valve plug 28 relatively to the annular valve seat. Each valve keeper 54 has an opening 58 to permit fluid to flow through the valve keeper 54. Each valve keeper 54 further has a stepped outer configuration provided by a main body portion and by a radially extending flange which extends radially outwardly from the body portion to define a base seat 56 which seats on the seat face 44 of the annular seat member 34.
The circumferential outer surface of each annu-lar seat member 34 is provided with a circumferential recess or groove 36 which is positioned to open into the seat face 44. A circumferential seal 50 is located in the recess 36 to engage sealingly with the base seat 56 as well as with the counterbore walls within which the valve assembly is located, as is hereinafter described.
The circumferential seal 50 consists of a Parker PolyPak device. In the case of the suction valve assembly 22, the seal 50 acts between the seat member 34 and the first counterbore 24 in the block member 12.
The base face 38 of valve seat member 34 is provided with an annular groove 46 which surrounds the channel opening ~8 of the valve assembly. The seal 52, in the form of an O-ring is located in the ~3~
-12~
annular groove 46. For the suction valve assembly 22, this seal 52 acts between the valve seat member 34 and an abutting face 72 of a suction manifold 66.
As shown in FIG. 1, the valve seat member 34 is received in a shallow recess 26 in the suction manifold 66.
The valve keeper 54 has a stepped outer con-figuration which is complementary to the counterbore configuration provided by the first and second counterbores 24 and 25 in the first passage 14 in the block member 12. The valve keeper 54 is therefore positively located in position, as shown particularly in Figure 2, in the counterbore configuration with its base seat 56 bearing against the annular surface between the first and second counterbores 24 and 25.
The base seat is located in this position by the annular seat member 34 having its seat face 44 bear-ing against the base seat, and by the circumferential seal 50 being sealingly compressed in the recess be-tween the base seat 56 and the annular wall defining the first counterbore 24.
Since the main body portion of the valve keeper 54 is not employed for the purpose of locating the valve assembly in position within the counterbore configura-tion of the block member 12, the valve keeper ls shaped to guide displacement of the valve plug 28, and to allow free flow of fluid through the side opening 58 without the arrangement of these feat~res being dictated by any need to utilize the main body portion of the valve keeper for locating the valve assembly in position.
~34~
With the specific construction of the valve assembly 22, where the plug 28 has a stem 32 which is guided by means of the guide 64 of the valve keeper 54, the need for a stem or wing which protrudes from the surface 30 of the valve plug 28 and thus into the flow channel 48, is eliminated. This, therefore, avoids such a stem or wing which protrudes into the flow channel 48 and which would, therefore, reduce the efficiency of operation of such a valve.
As will be apparent from Figure 2, the valve keeper 54 includes a recess 62 within which one end of the bias spring 60 is received and located.
Returning now to FIG. 1, it will be seen that the suction manifold 66, having a main suction pass-age 68, is disposed in abutment with the base face 38 of the seat member 34 so that passage 68 communi-cates with first passageway 14 by means of a suction channel 70 and the flow channel 48. Suction manifold 66 is secured to block member 12 by bolts 74 which extend through the suction manifold and into corres-ponding bores 76 of block member 12. Pursuant to this arrangement, the suction valve assembly 22 is clamped into position, thus eliminating the need for a tapered valve seat configuration and avoiding the hoop stresses which are induced thereby.
As previously noted, the arrangement of the dis-charge valve assembly 90 is essentially the same as has been described for the suction valve assembly.
However, in this aspect of the invention, the dis-charge valve assembly is disposed in a counterbore 84 in a discharge manifold 78. Counterbore 84 is con-centric with a discharge manifold inlet channel 88 . .- :. , ~ .,, : -- . ,: . .
~L3~
which communicates with a discharge manifold main passage 80. The counterbore 84 of the discharge manifold together with the inlet channel 88 corresponds with the counterbore configuration of the block member at the suction surface 13, so that the suction valve assembly 22 and the discharge valve assembly 90 are interchangeable. In the discharge valve assembly 90, the circumferential seal 50 of that assembly acts between the seat member 34 and the manifold counterbore 84.
A portion of the base of the seat member is received in a shallow recess 82 of the block member 12. Pursuant to this arrangement, a groove seal 52 acts between the base face of the seat member 34 and the block surface in the shallow recess 82.
Discharge manifo1d 78 is also secured to block member 12 by bolts 74, which extend through the discharge mani-fold and into corresponding bores 76 of the block member 12. Again, this arrangement secures the discharge valve assembly in place between the discharge manifold and the blocX member.
As shown in FIG. 3, the preferred embodiment of the present invention would have a multiplicity of first passageways 14 and corresponding second passageways 16 arranged in alignment within a block member 12 such that a single suction manifold and a single discharge manifold would secure and accommodate all suction valve assemblies and discharge valve assemblies respectively.
The foregoing description of the invention has been directed primarily part to a particular pre~erred embodi-ment in accordance with the requirements of the Patent - . .. .. .. .. .... ......... . . ....... . ... .. ..
,, "" j," ,j ", : . . .. . . .. ,. , :.. i . .. . . . . .
~L~3~
Statutes and for purpose of explanation and illustration.
It will be apparent, however, to those skilled in this art that many modifications and changes in this specific apparatus may be made without departing from the scope and spirit of the invention. For example, other configura-tions of the valve assembly elements may be utilized and, in particular, a valve plug stem might be structured such that the fluid could flow through spaces between the stem 32 and the stem guide 64, and thereby eliminate the need for the side opening 58 in valve keeper member 54.
It is applicant's intention in the following claims to cover such modifications and variations as fall within the true spirit and scope of the invention.
: . : ~ . :: ,, , :, ; , ,
Claims (9)
1. A fluid end block and valve assembly for a high pressure reciprocating pump, comprising:
a block member having a first passageway therein for operatively accommodating a reciprocat-ing piston, the first passageway being in communication with a suction surface of the block member through a stepped counterbore configuration in the block member;
a second passageway in the block member extend-ing from the first passageway to a discharge surface of the block member;
a suction manifold removably mounted on the block member at the suction surface, the suction manifold having a suction passage and having a suction channel to lead fluid being pumped from the suction passage to the first passageway;
a discharge manifold removably mounted on the block member at the discharge surface, the discharge manifold having a discharge pas-sage, having a discharge channel to lead fluid being pumped from the second passage-way to the discharge passage, and having a stepped counterbore configuration in the discharge channel;
a suction valve assembly removably clamped in position between the suction manifold and the block member, and a discharge valve assembly removably clamped in position between the discharge manifold and the block member;
each valve assembly comprising an annular seat member, a valve keeper engaged with the annular seat member, a valve plug housed within the assembly, and bias means to bias the valve plug into a closed position;
each annular seat member having a circumferen-tial outer wall, having a flow channel extending from a base face at one end to a seat face at the opposed end, and having an annular valve seat around the flow channel;
each valve plug having a seating face to coop-erate with one annular valve seat, and having a stem;
each valve keeper having a guide to cooperate with the stem to guide movement of the valve plug relatively to the annular valve seat, each valve keeper having an opening to permit fluid flow through the keeper, and each valve keeper having a stepped outer configuration provided by a body portion and a radially extending flange extending radially outwardly from the body portion to define a base seat which seats on the seat face of one annular seat member, each stepped outer configuration being complementary to one stepped counter-bore configuration for one valve assembly to be located in the stepped counterbore configuration of the block member and for the other valve assembly to be located in the stepped counterbore configuration of the discharge manifold with the base seat of each keeper being clamped between the seat face of one annular seat member and an annular surface in one counterbore configu-ration by the clamping action of the mani-folds; and sealing means between the block member and the valve assemblies, and between the valve assemblies and the manifolds.
a block member having a first passageway therein for operatively accommodating a reciprocat-ing piston, the first passageway being in communication with a suction surface of the block member through a stepped counterbore configuration in the block member;
a second passageway in the block member extend-ing from the first passageway to a discharge surface of the block member;
a suction manifold removably mounted on the block member at the suction surface, the suction manifold having a suction passage and having a suction channel to lead fluid being pumped from the suction passage to the first passageway;
a discharge manifold removably mounted on the block member at the discharge surface, the discharge manifold having a discharge pas-sage, having a discharge channel to lead fluid being pumped from the second passage-way to the discharge passage, and having a stepped counterbore configuration in the discharge channel;
a suction valve assembly removably clamped in position between the suction manifold and the block member, and a discharge valve assembly removably clamped in position between the discharge manifold and the block member;
each valve assembly comprising an annular seat member, a valve keeper engaged with the annular seat member, a valve plug housed within the assembly, and bias means to bias the valve plug into a closed position;
each annular seat member having a circumferen-tial outer wall, having a flow channel extending from a base face at one end to a seat face at the opposed end, and having an annular valve seat around the flow channel;
each valve plug having a seating face to coop-erate with one annular valve seat, and having a stem;
each valve keeper having a guide to cooperate with the stem to guide movement of the valve plug relatively to the annular valve seat, each valve keeper having an opening to permit fluid flow through the keeper, and each valve keeper having a stepped outer configuration provided by a body portion and a radially extending flange extending radially outwardly from the body portion to define a base seat which seats on the seat face of one annular seat member, each stepped outer configuration being complementary to one stepped counter-bore configuration for one valve assembly to be located in the stepped counterbore configuration of the block member and for the other valve assembly to be located in the stepped counterbore configuration of the discharge manifold with the base seat of each keeper being clamped between the seat face of one annular seat member and an annular surface in one counterbore configu-ration by the clamping action of the mani-folds; and sealing means between the block member and the valve assemblies, and between the valve assemblies and the manifolds.
2. An assembly according to claim 1, in which each annular valve seat is a bevelled surface which diverges outwardly from the flow channel on the seat face side of each annular seat member, and in which each valve plug has a complementary frustoconical seating face.
3. An assembly according to claim 1, in which the seal-ing means includes a circumferential seal provided in a circumferential groove in the circumferential outer wall of each annular seat member, each circumferential seal engaging sealingly with walls defining one counterbore.
4. An assembly according to claim 3, in which each circumferential groove is positioned to extend into the seat face for each circumferential seal to additionally engage sealingly with the base seat of one valve keeper.
5. An assembly according to claim 3 or claim 4, in which the sealing means further includes an O-ring provided in an annular groove in the base face of each annular seat member.
6. An assembly according to claim 1, in which the suction manifold has a recess within which the base face of one annular seat member is located, and in which the block member has a recess in its discharge surface within which the base face of the other annular seat member is located.
7. An assembly according to claim 1, in which the second passageway extends transversely to the first passageway, and in which the counterbore configuration of the block member is concentric with the first passageway.
8. An assembly according to claim 1, in which the suction and discharge valve assemblies correspond, and in which the counterbore configurations of the block member and the discharge manifold correspond.
9. An assembly according to claim 1, including a plurality of first passageways, a plurality of second passageways, a reciprocating piston operatively located in each first passageway, a suction valve assembly cooperating with each first passageway, a discharge valve assembly cooperating with each second passageway, a suction manifold having a plurality of suction channels clamping the suction valve assemblies in position, and a discharge manifold having a plurality of discharge channels clamping the discharge valve assemblies in position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10390879A | 1979-12-17 | 1979-12-17 | |
| US103,908 | 1979-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1134244A true CA1134244A (en) | 1982-10-26 |
Family
ID=22297656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA362,973A Expired CA1134244A (en) | 1979-12-17 | 1980-10-22 | High pressure fluid end block and valve assembly |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5692379A (en) |
| AU (1) | AU6357580A (en) |
| CA (1) | CA1134244A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD749692S1 (en) | 2014-10-08 | 2016-02-16 | PSI Pressure Systems Corp. | Nozzle |
| US9285040B2 (en) | 2013-10-10 | 2016-03-15 | PSI Pressure Systems Corp. | High pressure fluid system |
| CN106439150A (en) * | 2015-08-10 | 2017-02-22 | 浙江三花智能控制股份有限公司 | Valve shell assembly and valve |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59156187U (en) * | 1983-04-06 | 1984-10-19 | 東和空調株式会社 | sludge transport pump |
| JPH0465969U (en) * | 1990-10-12 | 1992-06-09 | ||
| JPH0563225U (en) * | 1992-01-29 | 1993-08-24 | 石川島芝浦機械株式会社 | Anti-vibration device for brush cutter |
-
1980
- 1980-10-22 AU AU63575/80A patent/AU6357580A/en not_active Abandoned
- 1980-10-22 CA CA362,973A patent/CA1134244A/en not_active Expired
- 1980-11-17 JP JP16183180A patent/JPS5692379A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9285040B2 (en) | 2013-10-10 | 2016-03-15 | PSI Pressure Systems Corp. | High pressure fluid system |
| US9334968B2 (en) | 2013-10-10 | 2016-05-10 | PSI Pressure Systems Corp. | High pressure fluid system |
| US9371919B2 (en) | 2013-10-10 | 2016-06-21 | PSI Pressure Systems Corp. | High pressure fluid system |
| US9470321B2 (en) | 2013-10-10 | 2016-10-18 | Psi Pressure Systems Corp | Quick coupler for a high pressure fluid system |
| US10113653B2 (en) | 2013-10-10 | 2018-10-30 | Psi Pressure Systems Llc | Cartridge assembly module for high pressure fluid system and related method of use |
| US10801628B2 (en) | 2013-10-10 | 2020-10-13 | Psi Pressure Systems Llc | Cartridge assembly module for high pressure fluid system and related method of use |
| USD749692S1 (en) | 2014-10-08 | 2016-02-16 | PSI Pressure Systems Corp. | Nozzle |
| CN106439150A (en) * | 2015-08-10 | 2017-02-22 | 浙江三花智能控制股份有限公司 | Valve shell assembly and valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5692379A (en) | 1981-07-27 |
| AU6357580A (en) | 1981-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU1683500A3 (en) | Electromagnetic drive operated piston pump | |
| US3820922A (en) | Multiplunger reciprocating pump | |
| CA1235947A (en) | High pressure pump | |
| US5171136A (en) | Fluid flow control device | |
| US3811801A (en) | Multi-plunger reciprocating pump | |
| US4430048A (en) | Diaphragm pump with a diaphragm clamped in pressure-balancing arrangement | |
| EP0280264B1 (en) | Multi-stage vacuum pump | |
| US4432386A (en) | Valve assembly for reciprocating plunger pump | |
| CA2114321A1 (en) | Quick-Change Fluid Section for Piston-Type Paint Pumps | |
| GB2144493A (en) | Actuator valve | |
| US7121812B2 (en) | High pressure pump having replaceable plunger/valve cartridges | |
| EP0371407A3 (en) | Ring valve type air compressor | |
| US6231323B1 (en) | High pressure reciprocating pump | |
| CA2012693A1 (en) | Intake valve for vacuum compressor | |
| CA1134244A (en) | High pressure fluid end block and valve assembly | |
| US7182016B2 (en) | High pressure fluid cylinder system | |
| DE19833286A1 (en) | Gas compressor water-cooled cylinder head | |
| CA2023184A1 (en) | Single piece gasket valve plate assembly | |
| US20230258174A1 (en) | Cover for fluid systems and related methods | |
| CA1327189C (en) | Valve arrangement | |
| US5207567A (en) | Pump with integral sump | |
| GB1158966A (en) | Improvements in or relating to Reciprocating Pumps and Valved Cylinder Heads therefor. | |
| EP0539188A1 (en) | Rotary vane device for hydraulic fluid | |
| CN112392571B (en) | Engine oil pump and engine | |
| CN2308731Y (en) | Hydraulic end of reciprocating high pressure water filling pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |