CN205805894U - A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve - Google Patents
A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve Download PDFInfo
- Publication number
- CN205805894U CN205805894U CN201620712110.5U CN201620712110U CN205805894U CN 205805894 U CN205805894 U CN 205805894U CN 201620712110 U CN201620712110 U CN 201620712110U CN 205805894 U CN205805894 U CN 205805894U
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- discharge opeing
- valve
- combination valve
- gland
- cylinder body
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- Reciprocating Pumps (AREA)
Abstract
A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve.It is arranged on the inside of high pressure reciprocating plunger pump hydraulic end cylinder body, including gland core, gland, feed liquor spring, feed liquor valve plate, combination valve body, discharge opeing valve gap, discharge opeing spool, discharge opeing spring and discharge opeing valve plate；The entering discharge opeing and only just can complete one by a valve body, two seal faces and liquid sucking-discharging spring and suck compression discharge cyclic process of the high pressure reciprocating plunger pump hydraulic end through type combination valve that this utility model provides, can avoid being arranged vertically single valve group to the high-voltage alternating loading problem caused at pump housing decussation hole in the past, and have that simple and compact for structure, detachable maintaining is convenient, valve seal end face is prone to processing maintenance, the advantage such as good manufacturability, flow loss are little, stable working, sealing is reliable, noise is little, life-span length.
Description
Technical field
This utility model belongs to hydraulic machinery technical field, particularly to a kind of high pressure reciprocating plunger pump hydraulic end with straight-through
Formula combination valve.
Background technology
High pressure reciprocating pump is also known as plunger displacement pump, and for an important device of hydraulic system, it relies on plunger in cylinder body
Move back and forth, make the volume of pressurization working lumen change and realize sucking medium, compressed media, there is rated pressure height, knot
The advantages such as structure is compact, efficiency is high and Flow-rate adjustment is convenient, being widely used in high pressure, big flow and flow needs the field of regulation
Close, in such as hydraulic press, engineering machinery, oil field and boats and ships.The most conventional plunger displacement pump is mainly by power end and fluid end two
Being grouped into, power end, for the energy of prime mover is passed to fluid end, mainly includes crankcase, high speed shaft, bent axle, gear ring, company
Bar and crosshead；Fluid end is then used for converting mechanical energy into fluid pressure energy.Fig. 1 is liquid on the plunger displacement pump of a kind of prior art
Power end portion structure longitudinal sectional view.As it is shown in figure 1, this fluid end mainly includes the post shown in cylinder body 9, gland 10, figure
Plug and bracket, liquid feed valve group and tapping valve group；Described cylinder body 9 is horizontally set on the torr being connected to power end upper crankcase rear end
Outside frame, middle part is formed with an inlet 11, is provided with outage near gland 10 side；After gland 10 is connected to cylinder body 9
End；Liquid feed valve group includes feed liquor valve seat 1, feed liquor valve plate 2, feed liquor valve gap 3 and feed liquor spring 4；Feed liquor valve gap 3 is positioned at cylinder body 9
Middle part is internal, and one end is fixed on the cylinder body 9 relative with inlet 11；Feed liquor valve seat 1 is fixed at inlet 11, which is provided with
3 feed liquor elongated holes 12, and there is a dismounting screw at middle part；Feed liquor spring 4 is enclosed within the middle part of feed liquor valve gap 3；Feed liquor valve plate 2 is with can
The mode moved radially along cylinder body 9 is enclosed within the position on feed liquor valve gap 3 between feed liquor spring 4 and feed liquor valve seat 1, and outward
Portion can block or leave feed liquor elongated hole 12；Tapping valve group includes discharge opeing valve seat 5, discharge opeing valve plate 6, discharge opeing valve gap 7 and discharge opeing
Spring 8；Discharge opeing valve gap 7 is positioned at the rear interior of cylinder body 9, and one end is fixed on the side of end cap 10；Discharge opeing valve seat 5 with liquid feed valve
Seat 1 perpendicular mode is positioned at the position on rear side of feed liquor valve gap 3 in being arranged on cylinder body 9, and it is formed three liquid stream elongated holes 13；
Discharge opeing spring 8 is enclosed within the middle part of discharge opeing valve gap 7；Discharge opeing valve plate 6 is can be enclosed within discharge opeing valve gap 7 in the way of moving axially along cylinder body 9
On position between discharge opeing spring 8 and discharge opeing valve seat 5, and outside can block or leave liquid stream elongated hole 13；Cylinder body 9
Front end inside a plunger is installed in a sliding manner, the front end of plunger connects with the rear end of crosshead on power end.
Now the plunger displacement pump operation principle of this prior art is described below: when needs compressed liquid, at the work of motor
Under with, generation is rotated by the high speed shaft on power end, thus drives crank rotation, then drivening rod, crosshead by gear ring
Horizontal reciprocating movement, crosshead drives plunger to move back and forth in cylinder body 9 again.When plunger makees drawback movement, cylinder body 9
Volume is gradually increased, and defines parital vacuum, and now discharge opeing valve plate 6 will abut against discharge opeing under the elastic force effect of discharge opeing spring 8
Being blocked by liquid stream elongated hole 13 on valve seat 5, under the effect of pressure reduction, low pressure liquid will pass through and entering that inlet 11 is connected
Liquid pipe enters in the feed liquor elongated hole 12 on feed liquor valve seat 1, the most inwardly promotes feed liquor valve plate 2, simultaneously compression feed liquor spring 4, directly
Leave the feed liquor elongated hole 12 on feed liquor valve seat 1 to feed liquor valve plate 2, at this moment low pressure liquid will go into the inside of cylinder body 9, and plunger continues
Continuous when moving to backhaul extreme position, imbibition process terminates, and at this moment, the internal imbibition of cylinder body 9 is most.When plunger makees process motion
Time, the volume in cylinder body 9 is gradually reduced, and liquid is squeezed, and pressure increases, at hydraulic pressure and the common work of feed liquor spring 4 elastic force
Under with, feed liquor valve plate 2 will be pushed back to block feed liquor elongated hole 12 at feed liquor valve seat 1, when fluid pressure reaches certain value,
Highly pressurised liquid will promote discharge opeing valve plate 6, simultaneously compression discharge opeing spring 8 to the left, until discharge opeing valve plate 6 leaves on discharge opeing valve seat 5
Liquid stream elongated hole 13, at this moment the highly pressurised liquid within cylinder body 9 will go into inside the left side of cylinder body 9, then outwards arranges through leakage fluid dram
Going out to receiving in container, when plunger reaches process extreme position, the volume within cylinder body 9 is minimum, and discharge opeing process is complete.Work as cylinder body
When in 9, fluid pressure reduces, discharge opeing valve plate 6 will be returned to discharge opeing valve seat 5 and liquid stream is long under the effect of discharge opeing spring 8 elastic force
Hole 13 blocks.Owing to plunger constantly moves back and forth, the most alternately, highly pressurised liquid is the most continuous for liquid sucking-discharging process
Ground output.
But, there is following point in the high pressure reciprocating pump of this prior art: liquid feed valve group and tapping valve group on it
Being to be separately provided in orthogonal mode, therefore structure complexity, difficulty of processing and volume and flow loss are big, and keep in repair not
Just.Additionally, noise ratio is bigger when running.
Summary of the invention
In order to solve the problems referred to above, the purpose of this utility model is to provide a kind of high pressure reciprocating plunger pump hydraulic end with straight
Formula combination valve.
In order to achieve the above object, the high pressure reciprocating plunger pump hydraulic end through type combination valve that this utility model provides.
Being arranged on the inside of high pressure reciprocating plunger pump hydraulic end cylinder body, described fluid end mainly includes cylinder body, end cap, post
Plug, through type combination valve and bracket；Wherein cylinder body is horizontally set on outside the bracket being connected to power end upper crankcase rear end, in
Portion is formed with an inlet, and rear end is provided with leakage fluid dram；End cap is connected to the rear end of cylinder body；To slide inside the front end of cylinder body 9
Mode a piece plunger is installed, the front end of plunger connects with the rear end of crosshead on power end；Described combination valve includes pressure
Set core, gland, feed liquor spring, feed liquor valve plate, combination valve body, discharge opeing valve gap, discharge opeing spool, discharge opeing spring and discharge opeing valve plate；
Wherein combination valve body is cylindrical structure, is horizontally set at the inlet at the interior middle part of cylinder body, on the periphery of middle part inwardly
It is formed with a scrobicular ring, is axially inside formed with a centre bore, be formed multiple radial near one end of plunger
Inclined hole, one end of inclined hole is positioned on the outer face of this end, and the other end is positioned at scrobicular ring；Gland core is dome shape, with opening towards
The mode of plunger is horizontally arranged at the side of combination valve body in cylinder body, and end face is formed an inlet opening, shape on periphery
Becoming to have multiple lateral inlet opening, lower edge caves inward and is formed with multiple elongated slot；Gland is circular tube shaped, and one end is enclosed within gland core
Rear outside；Feed liquor valve plate can be vertically set in the way of moving axially along cylinder body between gland and combination valve body, in
Between position be formed with an interstitial hole, outside left is corresponding with the inclined hole position on combination valve body, towards the side of gland
Edge is outwardly is formed with a spring positioning ring；In gap between gland core and gland, the one end of feed liquor spring,
The other end is fixed on the outside of spring positioning ring on feed liquor valve plate；Discharge opeing valve gap is dome shape, with opening surface to combination valve body
Mode be horizontally arranged at the opposite side of combination valve body, periphery is formed multiple sides outage；Discharge opeing spool is arranged
By inboard position in the inner chamber of discharge opeing valve gap, middle part is axially formed with a centre pilot hole along cylinder body, on periphery
It is formed with the oblique liquid outlet that multiple one end is connected with centre pilot hole；Discharge opeing valve plate is the spiral shell being made up of end face and guide post
Spike-like structures, is horizontally set in the inner chamber of discharge opeing valve gap position in the outer part, and guide post is inserted in a movable manner
In the centre pilot hole of discharge opeing spool；Discharge opeing spring housing is on the outer circumference surface of discharge opeing spool, and on one end and discharge opeing valve plate
The medial surface of end face contacts.
Described combination valve also includes being arranged on the back-up ring between cylinder body inner peripheral surface and discharge opeing valve gap outer circumference surface and O type
Sealing ring.
Described multiple inclined holes spaced set on combination valve body.
Described multiple lateral inlet opening spaced set on gland core.
The quantity of described elongated slot is three, spaced set on gland core, and with the position of lateral inlet opening that
This staggers.
The discharge opeing of entering of the high pressure reciprocating plunger pump hydraulic end through type combination valve that this utility model provides only passes through one
Valve body, two seal faces and liquid sucking-discharging spring just can complete one suck compression discharge cyclic process, can avoid with
Toward being arranged vertically single valve group to the high-voltage alternating loading problem caused at pump housing decussation hole, and it is tight to have simple in construction
Gather, detachable maintaining is convenient, valve seal end face is prone to processing maintenance, and good manufacturability, flow loss are little, stable working, sealing can
Lean on, the advantage such as noise is little, life-span length.
Accompanying drawing explanation
Fig. 1 is fluid end part-structure longitudinal sectional view on the plunger displacement pump of a kind of prior art.
Fig. 2 is for being provided with the high pressure reciprocating pump fluid end structure longitudinal direction section view of the combination valve that this utility model provides
Figure.
Fig. 3 Fig. 6 is respectively discharge opeing valve gap section view three-dimensional, longitudinal in the combination valve that this utility model provides, the right side regards and master
View.
Fig. 7 Fig. 9 is respectively discharge opeing spool section view three-dimensional, longitudinal and top view in the combination valve that this utility model provides.
Figure 10 Figure 11 is respectively gland solid and longitudinal sectional view in the combination valve that this utility model provides.
Feed liquor valve plate axonometric chart in the combination valve that Figure 12 provides for this utility model.
Figure 13 Figure 16 is respectively combination valve body section view three-dimensional, longitudinal in the combination valve that this utility model provides, master regards
And left view.
Discharge opeing valve plate axonometric chart in the combination valve that Figure 17 provides for this utility model.
In the combination valve that Figure 18 Figure 20 provides for this utility model, gland core is three-dimensional, left view and front view.
Detailed description of the invention
The high pressure reciprocating plunger pump hydraulic end provided this utility model with specific embodiment below in conjunction with the accompanying drawings is with straight-through
Formula combination valve is described in detail.The parts identical with prior art use identical drawing reference numeral.
As shown in Fig. 1 Figure 20, the high pressure reciprocating plunger pump hydraulic end that this utility model provides through type combination valve is pacified
Be contained in the inside of high pressure reciprocating plunger pump hydraulic end cylinder body 9, described fluid end mainly include cylinder body 9, end cap 10, plunger 14,
Bracket not shown in through type combination valve and figure；Wherein cylinder body 9 is horizontally set on and is connected to power end upper crankcase rear end
Outside bracket, middle part is formed with an inlet 11, and rear end is provided with leakage fluid dram；End cap 10 is connected to the rear end of cylinder body 9；Cylinder body 9
Front end inside a plunger 14, the front end of plunger 14 and the rear end phase of crosshead on power end are installed in a sliding manner
Connect；Described through type combination valve include gland core 15, gland 16, feed liquor spring 17, feed liquor valve plate 18, combination valve body 19,
Discharge opeing valve gap 20, discharge opeing spool 21, discharge opeing spring 22 and discharge opeing valve plate 23；Wherein combination valve body 19 is cylindrical structure,
It is horizontally set at the inlet 11 at the interior middle part of cylinder body 9, middle part periphery has been inwardly formed scrobicular ring, axially inside a shape
Cheng Youyi centre bore 24, is formed with multiple radial inclined hole 25 near one end of plunger 14, and one end of inclined hole 25 is positioned at
On the outer face of this end, the other end is positioned at scrobicular ring；Gland core 15 is dome shape, by opening towards level peace in the way of plunger 14
Be contained in the side of combination valve body 19 in cylinder body 9, end face be formed an inlet opening 26, periphery is formed multiple laterally
Inlet opening 27, lower edge caves inward and is formed with multiple elongated slot 28；Gland 16 is circular tube shaped, after one end is enclosed within gland core 15
Outside portion；Feed liquor valve plate 18 can be vertically set in the way of moving axially along cylinder body 9 between gland 16 and combination valve body 19,
Middle part is formed with an interstitial hole 29, and outside left is corresponding, towards pressure with inclined hole 25 position on combination valve body 19
The lateral edge of set 16 is outwardly is formed with a spring positioning ring 30；One end of feed liquor spring 17 is positioned at gland core 15 and pressure
In gap between set 16, the other end is fixed on the outside of spring positioning ring 30 on feed liquor valve plate 18；Discharge opeing valve gap 20 is dome
Shape, is horizontally arranged at the opposite side of combination valve body 19 in the way of opening surface is to combination valve body 19, periphery is formed
Multiple sides outage 31；Discharge opeing spool 21 is arranged in the inner chamber of discharge opeing valve gap 20 by inboard position, and middle part is along cylinder body 9
Be axially formed a centre pilot hole 32, periphery is formed with multiple one end is connected with centre pilot hole 32 oblique go out
Fluid apertures 33；Discharge opeing valve plate 23 is the screw-like structure being made up of end face 34 and guide post 35, is horizontally set on discharge opeing valve gap 20
Position in the outer part in inner chamber, and guide post 35 is inserted in the centre pilot hole 32 of discharge opeing spool 21 in a movable manner；
Discharge opeing spring 22 is enclosed within the outer circumference surface of discharge opeing spool 21, and one end connects with the medial surface of end face 34 on discharge opeing valve plate 23
Touch.
Described combination valve also includes the back-up ring 36 being arranged between cylinder body 9 inner peripheral surface and discharge opeing valve gap 20 outer circumference surface
With O RunddichtringO 37.
Described multiple inclined holes 25 spaced set on combination valve body 19.
Described multiple lateral inlet opening 27 spaced set on gland core 15.
The quantity of described elongated slot 28 is three, spaced set on gland core 15, and with lateral inlet opening 27
Position offsets one from another.
The operation principle of the high pressure reciprocating plunger pump hydraulic end through type combination valve now provided by this utility model illustrates
As follows: imbibition process is dependent on plunger 14 and produces negative pressure in cylinder body 9 to movement outside, and at this moment medium will be on cylinder body 9
Inlet 11 and combination valve body 19 on inclined hole 25 push the feed liquor valve plate 18 on combination valve body 19 end face open, be situated between afterwards
Matter enters the inside of gland 16 from circumference and the interstitial hole 29 of feed liquor valve plate 18, and meanwhile, feed liquor spring 17 is compressed, it
Rear medium enters gland core by also serving as the lateral inlet opening 27 on gland core 15 circumference of imbibition lift limiter and elongated slot 28
In the inner chamber of 15, so that being full of the imbibition cavity residing for cylinder body 9 inner plunger 14, plunger 14 moves back and forth, and feed liquor spring 17 relies on
Resilient force feed liquor valve plate 18 moves to combination valve body 19, and then blocks inclined hole 25, thus completes imbibition process；Discharge opeing
Time, feed liquor valve plate 18 is pressed on the end face of combination valve body 19 by the pressure reduction that feed liquor spring 17 and medium produce, and thus cuts off
Feed pathway, at this moment medium is by interstitial hole 29 and on the inlet opening 26 sequentially entered on gland core 15 end face, feed liquor valve plate 18
Centre bore 24 on combination valve body 19, plunger 14 continues to move to combination valve body 19 direction, is compressed medium, works as Jie
Matter reaches to press off the discharge opeing valve plate 23 of combination valve body 19 opposite side during the force value set, and makes discharge opeing valve plate 23 along also serving as
The centre pilot hole 32 that discharge opeing generates on the discharge opeing spool 21 of limiter is moved, and high-pressure medium enters the interior of discharge opeing valve gap 20 afterwards
In chamber, discharged by the leakage fluid dram on cylinder body of the side outage 31 on discharge opeing valve gap 20 afterwards, discharge opeing spring afterwards
22 will rely on elastic force to be pressed on the end face of combination valve body 19 by discharge opeing valve plate 23, thus complete a cycle of operation, connect
Entrance next one circulation.
Claims (5)
1. a high pressure reciprocating plunger pump hydraulic end through type combination valve, is arranged on the cylinder body of high pressure reciprocating plunger pump hydraulic end
9 is internal, and described fluid end mainly includes cylinder body (9), gland (10), plunger (14), through type combination valve and bracket；Wherein cylinder
Body (9) is horizontally set on outside the bracket being connected to power end upper crankcase rear end, and middle part is formed with an inlet (11), after
End is provided with leakage fluid dram；Gland (10) is connected to the rear end of cylinder body (9)；It is provided with in a sliding manner inside the front end of cylinder body (9)
A piece plunger (14), the front end of plunger (14) connects with the rear end of crosshead on power end；It is characterized in that: described through type
Combination valve includes gland core (15), gland (16), feed liquor spring (17), feed liquor valve plate (18), combination valve body (19), tapping valve
Lid (20), discharge opeing spool (21), discharge opeing spring (22) and discharge opeing valve plate (23)；Wherein combination valve body (19) is cylindrical knot
Structure, is horizontally set on inlet (11) place at the interior middle part of cylinder body (9), middle part periphery has been inwardly formed a scrobicular ring, internal
It is axially formed a centre bore (24), is formed with multiple radial inclined hole (25), tiltedly near one end of plunger (14)
The one end in hole (25) is positioned on the outer face of this end, and the other end is positioned at scrobicular ring；Gland core (15) is dome shape, with opening towards
The mode of plunger (14) is horizontally arranged at the side of cylinder body (9) interior combination valve body (19), and end face is formed an inlet opening
(26), periphery being formed with multiple lateral inlet opening (27), lower edge caves inward and is formed with multiple elongated slot (28)；Gland
(16) being circular tube shaped, one end is enclosed within the rear outside of gland core (15)；Feed liquor valve plate (18) is can move axially along cylinder body (9)
Mode is vertically set between gland (16) and combination valve body (19), and middle part is formed with an interstitial hole (29), outside
Position is corresponding with inclined hole (25) position on combination valve body (19), towards the outwardly formation of lateral edge of gland (16)
There is a spring positioning ring (30)；One end of feed liquor spring (17) is positioned in the gap between gland core (15) and gland (16),
The other end is fixed on the outside of the upper spring positioning ring (30) of feed liquor valve plate (18)；Discharge opeing valve gap (20) is dome shape, with opening surface
Mode to combination valve body (19) is horizontally arranged at the opposite side of combination valve body (19), and periphery is formed multiple side
Outage (31)；Discharge opeing spool (21) is arranged in the inner chamber of discharge opeing valve gap (20) by inboard position, and middle part is along cylinder body (9)
It is axially formed a centre pilot hole (32), periphery has been formed with multiple one end oblique with what centre pilot hole (32) were connected
To liquid outlet (33)；Discharge opeing valve plate (23) is the screw-like structure being made up of end face (34) and guide post (35), is horizontally set on
Position in the outer part in the inner chamber of discharge opeing valve gap (20), and guide post (35) is inserted in discharge opeing spool (21) in a movable manner
Centre pilot hole (32) in；Discharge opeing spring (22) is enclosed within the outer circumference surface of discharge opeing spool (21), and one end and tapping valve
The medial surface of the upper end face (34) of plate (23) contacts.
High pressure reciprocating plunger pump hydraulic end through type combination valve the most according to claim 1, it is characterised in that: described
Through type combination valve also include the back-up ring (36) that is arranged between cylinder body (9) inner peripheral surface and discharge opeing valve gap (20) outer circumference surface and
O RunddichtringO (37).
High pressure reciprocating plunger pump hydraulic end through type combination valve the most according to claim 1, it is characterised in that: described
Multiple inclined holes (25) are at the upper spaced set of combination valve body (19).
High pressure reciprocating plunger pump hydraulic end through type combination valve the most according to claim 1, it is characterised in that: described
Multiple lateral inlet openings (27) are at the upper spaced set of gland core (15).
High pressure reciprocating plunger pump hydraulic end through type combination valve the most according to claim 1, it is characterised in that: described
The quantity of elongated slot (28) is three, at the upper spaced set of gland core (15), and with the position of lateral inlet opening (27) each other
Stagger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620712110.5U CN205805894U (en) | 2016-07-07 | 2016-07-07 | A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620712110.5U CN205805894U (en) | 2016-07-07 | 2016-07-07 | A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205805894U true CN205805894U (en) | 2016-12-14 |
Family
ID=58140261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620712110.5U Withdrawn - After Issue CN205805894U (en) | 2016-07-07 | 2016-07-07 | A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205805894U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952633A (en) * | 2016-07-07 | 2016-09-21 | 天津市海盛泵业制造有限公司 | Straight-through combination valve applied to high-pressure reciprocation plunger pump hydraulic end |
| WO2023070837A1 (en) * | 2021-11-01 | 2023-05-04 | 烟台杰瑞石油装备技术有限公司 | Gland, hydraulic end, and plunger pump |
| US12044234B2 (en) | 2021-11-01 | 2024-07-23 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Cover, fluid end and plunger pump |
-
2016
- 2016-07-07 CN CN201620712110.5U patent/CN205805894U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952633A (en) * | 2016-07-07 | 2016-09-21 | 天津市海盛泵业制造有限公司 | Straight-through combination valve applied to high-pressure reciprocation plunger pump hydraulic end |
| CN105952633B (en) * | 2016-07-07 | 2017-10-10 | 天津市海盛泵业制造有限公司 | A kind of high pressure reciprocating plunger pump hydraulic end through type combination valve |
| WO2023070837A1 (en) * | 2021-11-01 | 2023-05-04 | 烟台杰瑞石油装备技术有限公司 | Gland, hydraulic end, and plunger pump |
| US12044234B2 (en) | 2021-11-01 | 2024-07-23 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Cover, fluid end and plunger pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161214 Effective date of abandoning: 20171010 |