CN105822539A - Combined inlet and outlet one-way valve for reciprocating pump - Google Patents
Combined inlet and outlet one-way valve for reciprocating pump Download PDFInfo
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- CN105822539A CN105822539A CN201610326590.6A CN201610326590A CN105822539A CN 105822539 A CN105822539 A CN 105822539A CN 201610326590 A CN201610326590 A CN 201610326590A CN 105822539 A CN105822539 A CN 105822539A
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- valve
- face
- spool
- discharge opeing
- feed liquor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1087—Valve seats
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to a combined inlet and outlet one-way valve for a reciprocating pump. The combined inlet and outlet one-way valve comprises a valve rod, a valve seat, a liquid inlet valve element and a liquid discharge valve element, wherein the valve seat is arranged outside the valve rod in a sleeving mode; the liquid inlet valve element is arranged on one side of the valve seat, and the face, making contact with the liquid inlet valve element, of the valve seat is a liquid inlet valve face; the liquid discharge valve element is arranged on the other side of the valve seat, and the face, making contact with the liquid discharge valve element, of the valve seat is a liquid discharge valve face; the valve seat is internally provided with a liquid inlet flow channel and a liquid discharge flow channel which do not communicate with each other; a liquid inlet communicating with the liquid inlet flow channel is formed in the liquid inlet valve face of the valve seat, and a liquid discharge port communicating with the liquid discharge flow channel is formed in the liquid discharge valve face of the valve seat. The combined inlet and outlet one-way valve is characterized in that at least one of the contact valve face of the liquid inlet valve element and the valve seat and the contact valve face of the liquid discharge valve element and the valve seat is a V-shaped cone valve face or a spherical cone valve face; correspondingly, at least one of the liquid inlet valve face and the liquid discharge valve face on the valve seat is a V-shaped cone valve face or a spherical cone valve face. The combined inlet and outlet one-way valve is small in size, high in pump efficiency and capable of effectively decreasing the flow velocity at a valve play.
Description
Technical field
The present invention relates to a kind of check valve, particularly relate to a kind of reciprocating pump combination type and import and export check valve.
Background technology
Reciprocating plunger pump main composition part is that to form assemblies be reciprocating plunger pump for power end, fluid end, three main bodys of power source.Power end major part is bent axle, fuselage, connecting rod, crosshead, coupling bar.Fluid end major part is the pump housing, letter body, plunger, filler, fairlead, combination valve group, feed liquor water collector, discharge opeing assembly.Power source is the compositions such as motor (diesel engine), reductor (drive pulley, transmission band), guard shield, base.Reciprocating plunger pump is positive displacement pump, has that pressure is high, flow is little, efficiency is high.In the case of equal-wattage, pressure is high, flow is little, otherwise flow is big, pressure is little, actuating unit basic simlarity, hydrodynamic body changes greatly, different medium different pressures, different efficiency just have different valve block structures, different fluid ends to arrange, the valve gap flow that different flows is different.Optimization design for reciprocating plunger pump mainly should belong to valve group, fluid end.The valve group of conventional design is single guiding, double guiding, flap type, cone valve, pawl valve, ball valve, cylinder valve, knife-edge valve etc. difformity valve, but all there is identical fluid to flow to, commonly referred to unidirectional runner valve, the valve gap flow of this valve group is the highest, owing to valve gap flow is the leading indicator of valve work, so the profile of valve, size are the biggest by limitation due to valve gap flow in the design, also result in that whole fluid end overall dimensions is big, feed consumption is many.First should set about from valve group so optimizing fluid end, the choice of flow direction of valve group is the main path reducing valve gap flow, and the valve group developing a kind of low valve gap flow for this is to improve pump efficiency, and optimization fluid end design reaches one of energy-efficient necessary approach.
Conventional reciprocating pump uses single channel or dual channel design with importing and exporting check valve, and Lift and the valve gap flow of valve are the most restricted.Along with the maximization of reciprocating pump, the flow of valve is increasing, uses single channel or dual channel design, and the physical dimension of valve is big, and the lift of valve is high, and spool quality weight, and valve gap flow is big.
Summary of the invention
The technical problem to be solved is that a kind of volume is little, pump efficiency is high, can effectively reduce the plunger pump valve group of valve gap flow in design.
The present invention solves the technical scheme that above-mentioned technical problem used: a kind of reciprocating pump combination type imports and exports check valve, comprises valve rod, valve seat, feed liquor spool and the discharge opeing spool being set in outside valve rod；Described feed liquor spool is arranged on valve seat side, and the valve face that valve seat contacts with feed liquor spool is liquid feed valve valve face；Described discharge opeing spool is arranged on valve seat opposite side, and the valve face that valve seat contacts with discharge opeing spool is tapping valve valve face；Feed liquor runner disconnected with each other and discharge opeing runner it is provided with in valve seat, it is provided with and the inlet of feed liquor flow passage on the liquid feed valve valve face of valve seat, the tapping valve valve face of valve seat is provided with and the leakage fluid dram of discharge opeing flow passage, it is characterized in that: described feed liquor spool and valve seat contact valve face and discharge opeing spool and valve seat contact in valve face at least a contact valve face V-shaped cone valve face or spheric cone valve face, correspondingly, in the liquid feed valve valve face on valve seat and tapping valve valve face, at least a valve face is V-arrangement cone valve face or spheric cone valve face.
As a kind of scheme, described feed liquor spool contacts the valve face the most V-shaped cone valve face that contacts of valve face and discharge opeing spool and valve seat or spherical cone valve face with valve seat, correspondingly, the liquid feed valve valve face on valve seat and tapping valve valve face the most V-shaped cone valve face or spheric cone valve face.
Alternatively implementation, the valve face V-shaped cone valve face that contacts of described feed liquor spool and valve seat or spherical cone valve face, described discharge opeing spool is flat board valve face with the valve face that contacts of valve seat；Correspondingly, the liquid feed valve valve face V-shaped cone valve face on valve seat or spherical cone valve face, the tapping valve valve face on valve seat is flat board valve face.
Alternatively implementation, it is flat board valve face that described feed liquor spool contacts valve face with valve seat, and described discharge opeing spool contacts valve face V-shaped cone valve face or spherical cone valve face with valve seat；Correspondingly, the liquid feed valve valve face on valve seat is flat board valve face, the tapping valve valve face V-shaped cone valve face on valve seat or spherical cone valve face.
Preferably, described feed liquor spool and discharge opeing spool all use hollow annular structure.
As improvement, N number of mutual disconnected feed liquor runner is set in described valve seat, correspondingly, liquid feed valve valve face also is provided with N number of inlet；Arranging M mutual disconnected discharge opeing runner in described valve seat, correspondingly, tapping valve valve face also is provided with M leakage fluid dram, M and N is the natural number more than or equal to 2.
Improve again, feed liquor valve pocket also it is cased with outside described valve rod, discharge opeing valve pocket, feed liquor spring and discharge opeing spring, liquid feed valve is set on valve seat side, tapping valve is set on valve seat opposite side, and feed liquor spool is movably set in outside feed liquor valve pocket, discharge opeing spool is movably set in outside discharge opeing valve pocket, feed liquor spring housing is located at outside feed liquor spool and feed liquor valve pocket, one end of feed liquor spring offsets with feed liquor spool, the other end of feed liquor spring offsets with feed liquor valve pocket, discharge opeing spring housing is located at outside discharge opeing spool and discharge opeing valve pocket, one end of discharge opeing spring offsets with discharge opeing spool, the other end of discharge opeing spring offsets with discharge opeing valve pocket.
Improve again, be provided with entrance runner in described feed liquor valve pocket, in described discharge opeing valve pocket, be provided with discharge runner.
Improve again, described feed liquor spool and discharge opeing spool were equipped with stream runner.
Improve again, between described valve seat and valve rod, be provided with sealing member.
Compared with prior art, it is an advantage of the current invention that: in liquid feed valve valve face on valve seat and tapping valve valve face, at least a valve face is V-arrangement cone valve face or spheric cone valve face, V-arrangement cone valve face or the design in spheric cone valve face, area of passage can be increased, reduce hydraulic loss, import check valve can be reduced again or/and the Lift of Outlet check valves, reduce the angle of lag that check valve is turned on and off, reduce backflow volumetric loss, improve the volumetric efficiency of pump；Meanwhile, also can reduce the speed that check valve is turned on and off, reduce impulsive force, reduce noise, meanwhile, this structure designs, and the axial dimension of whole valve group can be made to shorten, can reduce liquid cylinder height, economize on material, can improve again import and export runner and cross stream.
Accompanying drawing explanation
Fig. 1 is the structural representation that in the embodiment of the present invention one, reciprocating pump combination type imports and exports check valve；
Fig. 2 is the structural representation that in the embodiment of the present invention two, reciprocating pump combination type imports and exports check valve；
Fig. 3 is the structural representation that in the embodiment of the present invention three, reciprocating pump combination type imports and exports check valve；
Fig. 4 is the structural representation that in the embodiment of the present invention four, reciprocating pump combination type imports and exports check valve；
Fig. 5 is the structural representation that in the embodiment of the present invention five, reciprocating pump combination type imports and exports check valve；
Fig. 6 is the structural representation that in the embodiment of the present invention six, reciprocating pump combination type imports and exports check valve；
Fig. 7 is the structural representation that in the embodiment of the present invention seven, reciprocating pump combination type imports and exports check valve；
Fig. 8 is the structural representation that in the embodiment of the present invention eight, reciprocating pump combination type imports and exports check valve；
Fig. 9 is the structural representation that in the embodiment of the present invention nine, reciprocating pump combination type imports and exports check valve.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one
Reciprocating pump combination type as shown in Figure 1 imports and exports check valve, comprises valve rod 1, feed liquor valve pocket 2, discharge opeing valve pocket 9, feed liquor spring 3, discharge opeing spring 8, feed liquor spool 4, discharge opeing spool 7, valve seat 5, sealing member 6 and nut 10.Wherein feed liquor spool 4 and discharge opeing spool 7 are hollow and annular v-shaped structure, it may be assumed that have the tubular casing arm for sheathed valve rod 1, feed liquor spool 4 and discharge opeing spool 7 in the middle part of feed liquor spool 4 and discharge opeing spool 7 and be equipped with the valve face contact arm being connected forming V-shape with tubular casing arm；Feed liquor spool 4 is enclosed within described feed liquor valve pocket 2 slidably, discharge opeing spool 7 is enclosed within described discharge opeing valve pocket 9 slidably, feed liquor valve pocket 2 and discharge opeing valve pocket 9 are all set in outside valve rod, and it is separately positioned on the both sides of valve seat 5, feed liquor spring 3 is set in outside feed liquor spool 4 and feed liquor valve pocket 2, one end of feed liquor spring 3 offsets with feed liquor spool 4, the other end of feed liquor spring 3 offsets with feed liquor valve pocket 2, discharge opeing spring 8 is set in outside discharge opeing spool 7 and discharge opeing valve pocket 9, one end of discharge opeing spring 8 offsets with discharge opeing spool 7, and the other end of discharge opeing spring 8 offsets with discharge opeing valve pocket 9.Feed liquor spring 3 and discharge opeing spring 8 make feed liquor spool 4 and discharge opeing spool 7 realize tight seal with valve seat 5 respectively.Described feed liquor valve pocket 2, discharge opeing valve pocket 9 and valve seat 5 are installed and are set in outside valve rod 1, and fasten with nut 10.It is provided with entrance runner 21 in described feed liquor valve pocket 2, in described discharge opeing valve pocket 9, is provided with discharge runner 91；Feed liquor valve pocket 2 and discharge opeing valve pocket 9 have guiding, turnover medium and lift limiter effect concurrently.Stream runner 41,71 it was respectively equipped with on described feed liquor spool 4 and discharge opeing spool 7.It is provided with sealing member 6 between described valve seat 5 and valve rod, isolates terminal valve.The face that valve seat contacts with feed liquor spool is liquid feed valve valve face, and the face that valve seat contacts with discharge opeing spool is tapping valve valve face；Circular cone valve face is all used to contact between described valve seat 5 and feed liquor spool 4, between valve seat 5 and discharge opeing spool 7, that is: what described feed liquor spool contacted valve face and discharge opeing spool and valve seat with valve seat contacts valve face the most V-shaped cone valve face, correspondingly, the liquid feed valve valve face on valve seat and tapping valve valve face the most V-shaped cone valve face.N number of mutual disconnected feed liquor runner is set in described valve seat, correspondingly, liquid feed valve valve face also is provided with N number of inlet；Arranging M mutual disconnected discharge opeing runner in described valve seat, correspondingly, tapping valve valve face also is provided with M leakage fluid dram, M and N is the natural number more than or equal to 2.
Owing to all using circular cone valve face to contact between valve seat 5 with feed liquor spool 4, between valve seat 5 and discharge opeing spool 7, area of passage can be increased, reduce hydraulic loss；Import and export check valve Lift can be reduced again, reduce the angle of lag that check valve is turned on and off, reduce backflow volumetric loss, improve the volumetric efficiency of pump；Meanwhile, also can reduce the speed that check valve is turned on and off, reduce impulsive force, reduce noise；Liquid feed valve valve face arranges N number of mutual disconnected inlet, tapping valve valve face arranges M mutual disconnected leakage fluid dram, area of passage can be effectively increased, reduce hydraulic loss；Arranging multiple feed liquor runner and discharge opeing runner in valve seat, same valve seat has multiple feed liquor runner and discharge opeing runner, and it is independent sealed, non-interference；When making non-return valve operational, can ensure that N number of feed liquor runner or M draining flow synchronize to be turned on and off, without interfering；And whole valve group axial dimension is short, can reduce liquid cylinder height, economize on material；Import and export runner can be improved again and cross stream.
Reciprocating pump combination type in the present invention imports and exports check valve along with the reciprocating motion of piston continuous suction medium；Being defined as forward by piston direction of pressure liquid in fluid cylinder, rightabout is defined as backward；When piston advances forward, import closed check valve, under piston seal effect, in fluid cylinder, fluid pressure raises, and discharge opeing spool 7 overcomes the pressure of discharge opeing spring 8, departs from valve seat 5, Outlet check valves is opened, and medium supercharging in fluid cylinder is discharged by discharging runner A, B；When piston rearward movement, Outlet check valves is closed, and under piston seal effect, volume increases, and forms vacuum, and feed liquor spool 4 overcomes the pressure of feed liquor spring 3, departs from valve seat 5, and import check valve is opened, and is inhaled in fluid cylinder by feed liquor runner C, D medium.
Embodiment two
Unlike embodiment one, what described feed liquor spool 4 contacted valve face and discharge opeing spool 7 and valve seat 5 with valve seat 5 contacts valve face cone valve the most spherical in shape face, correspondingly, liquid feed valve valve face on valve seat 5 and tapping valve valve face cone valve the most spherical in shape face, so that between described valve seat 5 with feed liquor spool 4, valve seat 5 forms circular cone valve face and contacts with discharge opeing spool 7.Shown in Figure 2.
Embodiment three
Unlike embodiment one, described discharge opeing spool 7 uses L-type structure；The valve face V-shaped cone valve face that contacts of described feed liquor spool 4 and valve seat 5, described discharge opeing spool 7 is plane with the valve face that contacts of valve seat 5；Correspondingly, the liquid feed valve valve face V-shaped cone valve face on valve seat, the tapping valve valve face on valve seat 5 is plane.Shown in Figure 3.
Embodiment four
Unlike embodiment one, described discharge opeing spool 7 uses L-type structure；The valve face cone valve spherical in shape face that contacts of described feed liquor spool 4 and valve seat 5, described discharge opeing spool 7 is plane with the valve face that contacts of valve seat 5；Correspondingly, the liquid feed valve valve face cone valve spherical in shape face on valve seat, the tapping valve valve face on valve seat 5 is plane.Shown in Figure 4.
Embodiment five
Unlike embodiment one, the valve face V-shaped cone valve face that contacts of described feed liquor spool 4 and valve seat 5, described discharge opeing spool 7 contacts valve face cone valve spherical in shape face with valve seat 5；Correspondingly, the liquid feed valve valve face V-shaped cone valve face on valve seat, the tapping valve valve face cone valve spherical in shape face on valve seat 5.Shown in Figure 5
Embodiment six
Unlike embodiment one, the valve face cone valve spherical in shape face that contacts of described feed liquor spool 4 and valve seat 5, described discharge opeing spool 7 contacts valve face V-shaped cone valve face with valve seat 5；Correspondingly, the liquid feed valve valve face cone valve spherical in shape face on valve seat, the tapping valve valve face V-shaped cone valve face on valve seat 5.Shown in Figure 6.
Embodiment seven
Unlike embodiment one, described discharge opeing spool 7 uses hollow conic structure；Further, the valve face V-shaped cone valve face that contacts of described feed liquor spool 4 and valve seat 5, described discharge opeing spool 7 contacts valve face cone valve spherical in shape face with valve seat 5；Correspondingly, the liquid feed valve valve face V-shaped cone valve face on valve seat, the tapping valve valve face on valve seat 5 is cone valve face spherical in shape.Shown in Figure 7.
Embodiment eight
Unlike embodiment one, described feed liquor spool 4 uses L-type structure；Described feed liquor spool 4 is plane with the valve face that contacts of valve seat 5, and described discharge opeing spool 7 contacts valve face V-shaped cone valve face with valve seat 5；Correspondingly, the liquid feed valve valve face on valve seat is plane, the tapping valve valve face V-shaped cone valve face on valve seat 5.Shown in Figure 8.
Embodiment nine
Unlike embodiment one, described feed liquor spool 4 uses L-type structure；Described feed liquor spool 4 is plane with the valve face that contacts of valve seat 5, and described discharge opeing spool 7 contacts valve face cone valve spherical in shape face with valve seat 5；Correspondingly, the liquid feed valve valve face on valve seat is plane, the tapping valve valve face cone valve spherical in shape face on valve seat 5.Shown in Figure 9.
Claims (10)
1. reciprocating pump combination type imports and exports a check valve, comprises valve rod, valve seat, feed liquor spool and the discharge opeing spool being set in outside valve rod；Described feed liquor spool is arranged on valve seat side, and the face that valve seat contacts with feed liquor spool is liquid feed valve valve face；Described discharge opeing spool is arranged on valve seat opposite side, and the face that valve seat contacts with discharge opeing spool is tapping valve valve face；Feed liquor runner disconnected with each other and discharge opeing runner it is provided with in valve seat, it is provided with and the inlet of feed liquor flow passage on the liquid feed valve valve face of valve seat, the tapping valve valve face of valve seat is provided with and the leakage fluid dram of discharge opeing flow passage, it is characterized in that: described feed liquor spool and valve seat contact valve face and discharge opeing spool and valve seat contact in valve face at least a contact valve face V-shaped cone valve face or spheric cone valve face, correspondingly, in the liquid feed valve valve face on valve seat and tapping valve valve face, at least a valve face is V-arrangement cone valve face or spheric cone valve face.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterized in that: described feed liquor spool contacts the valve face the most V-shaped cone valve face that contacts of valve face and discharge opeing spool and valve seat or spherical cone valve face with valve seat, correspondingly, the liquid feed valve valve face on valve seat and tapping valve valve face the most V-shaped cone valve face or spheric cone valve face.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterised in that: the valve face V-shaped cone valve face that contacts of described feed liquor spool and valve seat or spherical cone valve face, described discharge opeing spool is plane with the valve face that contacts of valve seat；Correspondingly, the liquid feed valve valve face V-shaped cone valve face on valve seat or spherical cone valve face, the tapping valve valve face on valve seat is flap type valve face.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterised in that: it is plane that described feed liquor spool contacts valve face with valve seat, and described discharge opeing spool contacts valve face V-shaped cone valve face or spherical cone valve face with valve seat；Correspondingly, the liquid feed valve valve face on valve seat is plane, the tapping valve valve face V-shaped cone valve face on valve seat or spherical cone valve face.
5. import and export check valve according to the reciprocating pump combination type described in Claims 2 or 3 or 4, it is characterised in that: described feed liquor spool and discharge opeing spool all use hollow annular structure.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterised in that: N number of mutual disconnected feed liquor runner is set in described valve seat, correspondingly, liquid feed valve valve face also is provided with N number of inlet；Arranging M mutual disconnected discharge opeing runner in described valve seat, correspondingly, tapping valve valve face also is provided with M leakage fluid dram, M and N is the natural number more than or equal to 2.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterized in that: outside described valve rod, be also cased with feed liquor valve pocket, discharge opeing valve pocket, feed liquor spring and discharge opeing spring, liquid feed valve is set on valve seat side, tapping valve is set on valve seat opposite side, and feed liquor spool is movably set in outside feed liquor valve pocket, discharge opeing spool is movably set in outside discharge opeing valve pocket, feed liquor spring housing is located at outside feed liquor spool and feed liquor valve pocket, one end of feed liquor spring offsets with feed liquor spool, the other end of feed liquor spring offsets with feed liquor valve pocket, discharge opeing spring housing is located at outside discharge opeing spool and discharge opeing valve pocket, one end of discharge opeing spring offsets with discharge opeing spool, the other end of discharge opeing spring offsets with discharge opeing valve pocket.
Reciprocating pump combination type the most according to claim 7 imports and exports check valve, it is characterised in that: it is provided with entrance runner in described feed liquor valve pocket, in described discharge opeing valve pocket, is provided with discharge runner.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterised in that: it was equipped with stream runner on described feed liquor spool and discharge opeing spool.
Reciprocating pump combination type the most according to claim 1 imports and exports check valve, it is characterised in that: it is provided with sealing member between described valve seat and valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326590.6A CN105822539A (en) | 2016-05-17 | 2016-05-17 | Combined inlet and outlet one-way valve for reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326590.6A CN105822539A (en) | 2016-05-17 | 2016-05-17 | Combined inlet and outlet one-way valve for reciprocating pump |
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| CN105822539A true CN105822539A (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610326590.6A Pending CN105822539A (en) | 2016-05-17 | 2016-05-17 | Combined inlet and outlet one-way valve for reciprocating pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106907508A (en) * | 2017-04-19 | 2017-06-30 | 宁波合力机泵股份有限公司 | One kind is applicable conveying air-liquid or gas-liquid mixed multinomial medium compression pump multiple flow passages Outlet check valves |
| CN107084120A (en) * | 2017-04-19 | 2017-08-22 | 宁波合力机泵股份有限公司 | One kind is applied to air-liquid or gas-liquid mixed multinomial medium compression pump multiple flow passages import check valve |
| CN109458326A (en) * | 2019-01-04 | 2019-03-12 | 宁波合力机泵股份有限公司 | A kind of double acting fluid end of the horizontal valve group of reciprocating pump |
| CN109723635A (en) * | 2019-03-13 | 2019-05-07 | 宁波合力机泵股份有限公司 | A kind of reciprocating pump hydraulic-end for oil field note medium containing sand |
| CN110748480A (en) * | 2019-10-14 | 2020-02-04 | 杭州盛维科技有限公司 | Hydraulic end for pump and multichannel check valve subassembly of institutional advancement |
| WO2022166096A1 (en) * | 2021-02-04 | 2022-08-11 | 烟台杰瑞石油装备技术有限公司 | Flow divider, hydraulic end and plunger pump |
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