CN201148968Y - Hydraulic end unit of reciprocating plunger pump - Google Patents
Hydraulic end unit of reciprocating plunger pump Download PDFInfo
- Publication number
- CN201148968Y CN201148968Y CNU2007200996075U CN200720099607U CN201148968Y CN 201148968 Y CN201148968 Y CN 201148968Y CN U2007200996075 U CNU2007200996075 U CN U2007200996075U CN 200720099607 U CN200720099607 U CN 200720099607U CN 201148968 Y CN201148968 Y CN 201148968Y
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- China
- Prior art keywords
- ring
- stuffing box
- gland
- pump
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims description 33
- 210000004907 gland Anatomy 0.000 claims description 32
- 230000037361 pathway Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010974 bronze Substances 0.000 claims description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000010068 moulding (rubber) Methods 0.000 claims description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 abstract 4
- 239000007788 liquid Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- Details Of Reciprocating Pumps (AREA)
Abstract
A hydro end unit of a reciprocating plunger piston pump belongs to a reciprocating plunger piston pump, relates to the conformation of the hydro end of the plunger piston pump, and is particularly suitable for the use of a super-pressure pump. The hydro end unit comprises a valve body combined with a pump head, and a stuffing box which is assembled on the plunger piston of the pump and allows the plunger piston to conduct reciprocating movement, wherein, the stuffing box comprises a sleeve; a working chamber that satisfies the reciprocating stroke of a valve core is arranged at the inner port of the sleeve; a first pressing sleeve which is in sliding fit with the cylindrical surface of the plunger piston is arranged close to the working chamber; a hold-down spring that forms an original pre-pressure of the stuffing box is arranged adjacent to the first hold-down sleeve; a second pressing sleeve, which is provided with an end face for connecting the hold-down spring on one end thereof and an end part for compressing a sealing ring component on the other end thereof, is arranged adjacent to the hold-down spring; the sealing ring component is arranged adjacent to the second pressing sleeve; the sealing ring component performs stop catch by a limit ring; a stuffing box press piece fixedly positions and mounts the valve body and the stuffing box by a tightening piece. The reasonable configuration formed integrally by the working chamber and the stuffing box provides reliable guarantee for sealing the hydro end.
Description
Technical field
This case belongs to reciprocating pump, relates to the fluid end structure of plunger pump, is specially adapted to superpressure pump.
Background technique
Known techniques as 200520008989.7 1 kinds of reliable horizontal plunger pumps of fluid end sealing of disclosed Chinese patent, belongs to the plunger pump technique field.Be used to solve the defective of existing horizontal plunger pump fluid power end sealing operational reliability difference.The pump housing, plunger are arranged in the formation, the pump housing one end be have into, the fluid end of liquid discharging valve, after the improvement, valve seat in the fluid end is a cone, valve seat orifice is the conical bore that matches, adopt the cone seal end face of coupling between valve plate and the valve seat, the internal leakage problem when having eliminated former valve seat and valve seat orifice and adopting the cylinder bore structure is eliminated former valve plate and valve base sealing end face and is easily retained disadvantages such as impurity dirt, poorly sealed close, internal leakage wash away seriously; Simplified, the liquid discharging valve structure, eliminated that valve plate is easily stuck, the faults that take place frequently such as the easily loosening fracture of valve rod, fFour piece type pintle hook lock loading and unloading trouble.
00219074.5 1 kinds of high pressure liquid stream fluids end of pump of and for example disclosed Chinese patent, the plunger bushing, valve seat and the spool thereof that comprise plunger pump are formed, be provided with the spool that in valve seat, slides in the valve seat with plunger to-and-fro motion equidirectional, one end of valve seat and high-pressure column plug sleeve plane contact and around spool, form an active chamber, the other end contacts and forms the hyperbaric chamber outlet around spool with the pump head face, have 2-4 through hole or groove that axially is connected to the other end valve seat on the spool, the cross section Line of contact of spool and valve seat is the obtuse angle.
The seal construction complexity of known technology fluid end, under the high pressure operating mode, pump housing fluid end sealing can not obtain better guarantee.
Summary of the invention
Problem to be solved in the utility model is, overcomes the above-mentioned defective that the technology of taking over exists, and a kind of fluid end unit that improves the reciprocating pump of fluid end seal construction is provided.
The utility model technical solution problem takes following technological scheme to realize, a kind of fluid end unit of reciprocating pump is provided according to the utility model, comprise the valve body that combines with pump head, with on the plunger that is assemblied in pump, hold the reciprocating stuffing box of plunger, wherein, described stuffing box has sleeve, and this sleeve endoporus port is provided with the active chamber that satisfies the spool reciprocating stroke, becomes first gland of sliding matching mode with the plunger cylinder face in abutting connection with this active chamber setting; The holddown spring that forms the original precompression of stuffing box inner chamber is set in abutting connection with this first gland, in abutting connection with this holddown spring one end is set and has the end face of accepting holddown spring, the other end has second gland that compresses the ring assembly end, in abutting connection with this second gland ring assembly is set, the sealing ring member is by baffle ring backstop; The stuffing box briquetting installs valve body, stuffing box location by fastening piece.
This case technical solution problem can also adopt following technical measures further to realize:
The fluid end unit of aforementioned reciprocating pump, wherein, described ring assembly is made up of first seal ring and second seal ring, and described first seal ring simultaneously has the groove end face towards pump head, and pump head simultaneously forms flange end face dorsad; The flange end that the second o-ring groove end that described second seal ring and the flange end that combines the end face setting and first seal ring of first seal ring match, described second gland and the groove end face that combines the end face setting and first seal ring of first seal ring match.
The fluid end unit of aforementioned reciprocating pump, wherein, the front-end face of described valve body has the ring runner that is communicated with the pump head feed pathway, the feed pathway of the active chamber of distribute in the described valve body connection ring runner and stuffing box front portion; But the feed liquor valve plate becomes the mode of closure or openness feed pathway to be sleeved on the discharge opeing spool; Discharge opeing spool end installs can push spool stroke length of spring compressed that is sleeved on the discharge opeing spool or the locking nut that resets.
The fluid end unit of aforementioned reciprocating pump, wherein, the plunger front end is just supported in described discharge opeing spool its end under closed state, and this plunger end face and the first gland interior edge face remain on same end face.
The fluid end unit of aforementioned reciprocating pump, wherein, the ring of described ring runner is provided with the outer shroud seal ring outward, ring seal ring in this ring runner and discharge opeing valve core chamber are provided with.
The fluid end unit of aforementioned reciprocating pump, wherein, the sleeve of described stuffing box is a metal sleeve, described active chamber, first gland, holddown spring, second gland, ring assembly, baffle ring are installed in the metal sleeve.
The fluid end unit of aforementioned reciprocating pump, wherein, described first gland, second gland are wear-resistant metal material; Described ring assembly is the rubber-moulding Sealing of fiberfill fibers.
The fluid end unit of aforementioned reciprocating pump, wherein, described first gland or second gland are aluminum bronze.
The utility model compared with prior art has significant advantage and beneficial effect.By above technological scheme as can be known, the utility model has under the structural arrangements of excellence and includes but not limited to above-mentioned significant technological merit:
The reasonable disposition that this case active chamber and stuffing box are integrally formed is for the sealing of fluid end reliably provides guarantee; The structural arrangements of this case is improved the inner stress of pump head at all, can effectively prolong the pump housing life-span; Convenient during repair demolition; Just the may command valve body advances, discharge opeing synchronouss working and be skillfully constructed by a spool stroke spring for this case feed liquor valve plate and discharge opeing spool, and is simple in structure, can effectively reduce cost of goods manufactured, and more optimize manufacturing process, is fit to widely industry and promotes.
The utility model contrast prior art has significant contribution and progress, has realized its technical purpose fully, is the good technology with novelty, creativeness, practicability.
Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is for having fluid end overall structure schematic representation of the present utility model;
Fig. 2 is the utility model organigram;
Fig. 2 a is the decomposition package assembly schematic representation of second gland and first, second seal ring in this case;
Fig. 3 is valve body structure schematic representation in this case.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided, describe in detail as after.
As Figure 1-3, a kind of fluid end unit of reciprocating pump, comprise the valve body 2 that combines with pump head 1, with on the plunger 6 that is assemblied in pump, hold the reciprocating stuffing box 3 of plunger, wherein, described stuffing box 3 has a metal sleeve 31, and this sleeve endoporus port is provided with the active chamber 32 that satisfies the spool reciprocating stroke, in abutting connection with this active chamber first gland 33 that becomes sliding matching mode with plunger 6 cylinders face is set, this first gland plays the positioning and guiding effect to plunger; The holddown spring 34 that forms the original precompression of stuffing box inner chamber is set in abutting connection with this first gland, in abutting connection with this holddown spring one end is set and has the end face of accepting holddown spring, the other end has second gland 35 that compresses the ring assembly end, in abutting connection with this second gland 35 ring assembly 36 is set, the sealing ring member is by baffle ring 37 backstops;
Described ring assembly 36 is made up of first seal ring 361 and second seal ring 362, and described first seal ring 361 simultaneously has groove end face 3611 towards pump head, and pump head simultaneously forms flange end face 3612 dorsad; The flange end 351 that the second o-ring groove end 3621 that described second seal ring 362 and the flange end that combines the end face setting and first seal ring of first seal ring 361 match, described second gland 35 and the groove end face that combines the end face setting and first seal ring of first seal ring 361 match; The structure of first seal ring is arranged so that stuffing box has the higher pressure capability of bearing;
The front-end face of described valve body 2 has the ring runner 20 that is communicated with pump head feed pathway 11, can hold low-pressure water and flow through thus, and outer shroud seal ring 21 is set outside the ring of this ring runner, ring seal ring 22 in this ring runner and 26 of discharge opeing spools are provided with; Valve body and pump head joint part adopt end face seal, construct simplyr, seal more reliably, effectively reduced wasted space, thereby volumetric efficiency is improved;
Distribution is communicated with the feed pathway 23 of the active chamber 32 of ring runner 20 and stuffing box front portion in the valve body; But the mode of 24 one-tenth closure or openness feed pathway of feed liquor valve plate is sleeved on the discharge opeing spool 26; Discharge opeing spool end installs can push spool stroke spring 25 compressions that are sleeved on the discharge opeing spool or the locking nut 27 that resets; And when this discharge opeing spool was in closed state (being that the spool stroke spring is in releasing state), the interior edge face of the plunger and first gland 33 was directed reach in discharge opeing spool end, with this maximum value that forms spool stroke length value of active chamber exactly;
Reduce the active chamber space thus and can improve volumetric efficiency, reduce the ultrahigh pressure working state and give the pressure that brings in the stuffing box active chamber, guarantee sealing;
The stuffing box briquetting installs valve body, stuffing box location by fastening piece 9; 4 of stuffing box and stuffing box briquettings add puts packing ring 41; Several fluid end unit establish one's own system, and connect with pump head respectively, constitute the fluid end of reciprocating pump, and so structural arrangements is not adorned any component in the pump head body, and only as the usefulness of advancing apocenosis passage, the inner stress of pump head improves.Substantially solve under the ultrahigh pressure state, pump head is inner owing to fatigue strength cracks, and then a difficult problem that causes pump head to scrap.
The pump housing life-span can effectively be prolonged; Be convenient to maintenance, that badly tears that open, does not bring disaster to integral body; During dismounting, need not moving pump head, only out of order unit is pulled down, just valve group, stuffing box can be taken out maintenance from unit.
Under the ultrahigh pressure state, the liquid medium in the pump housing is exactly a kind of compressible elastomer, is very big to the volumetric efficiency influence of pump; This case active chamber integrally formed reasonable disposition in stuffing box had both been optimized the component configuration, had effectively reduced the high pressure sealing link again, guaranteed that further sealing is reliable;
Just the may command valve body advances, discharge opeing synchronouss working by a spool stroke spring for feed liquor valve plate and discharge opeing spool;
Stuffing box is set to cylindrical container, and its internal diameter is a cylindrical interior volume, has optimized processing technology;
According to the structure configuration of the excellence of this programme, can effectively improve the proof pressure of fluid end, make its proof pressure can reach 275MPa (2750bar).
Working principle:
Plunger moves (being the imbibition state) backward, and by the medium that the pump head liquid entering hole is come in, the passage in pump head enters the low-pressure cavity that valve body front end ring runner forms, and enters active chamber by valve body periphery inclined hole again.Before medium enters active chamber, push the feed liquor valve plate earlier open, when plunger retreated to terminal point, feed liquor stopped.
The feed liquor valve plate resets under the effect of spring fast, closes feed pathway.
Plunger travels forward, and the medium pressurized of (discharge opeing state) active chamber, pressure begin to rise, increase, and the center-aisle by valve body, promotes the discharge opeing spool, enters the apocenosis passage in the pump head, is exported by liquid port.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1. the fluid end unit of a reciprocating pump, comprise the valve body that combines with pump head, with on the plunger that is assemblied in pump, hold the reciprocating stuffing box of plunger, it is characterized in that, described stuffing box has sleeve, this sleeve endoporus port is provided with the active chamber that satisfies the spool reciprocating stroke, becomes first gland of sliding matching mode with the plunger cylinder face in abutting connection with this active chamber setting; The holddown spring that forms the original precompression of stuffing box inner chamber is set in abutting connection with this first gland, in abutting connection with this holddown spring one end is set and has the end face of accepting holddown spring, the other end has second gland that compresses the ring assembly end, in abutting connection with this second gland ring assembly is set, the sealing ring member is by baffle ring backstop; The stuffing box briquetting installs valve body, stuffing box location by fastening piece.
2. the fluid end unit of reciprocating pump according to claim 1 is characterized in that described ring assembly is made up of first seal ring and second seal ring, and described first seal ring simultaneously has the groove end face towards pump head, and pump head simultaneously forms flange end face dorsad; The flange end that the second o-ring groove end that described second seal ring and the flange end that combines the end face setting and first seal ring of first seal ring match, described second gland and the groove end face that combines the end face setting and first seal ring of first seal ring match.
3. the fluid end unit of reciprocating pump as claimed in claim 1 or 2, it is characterized in that, the front-end face of described valve body has the ring runner that is communicated with the pump head feed pathway, the feed pathway of the active chamber of distribute in the described valve body connection ring runner and stuffing box front portion; But the feed liquor valve plate becomes the mode of closure or openness feed pathway to be sleeved on the discharge opeing spool; Discharge opeing spool end installs can push spool stroke length of spring compressed that is sleeved on the discharge opeing spool or the locking nut that resets.
4. as the fluid end unit of reciprocating pump as described in the claim 3, it is characterized in that the plunger front end is just supported in described discharge opeing spool its end under closed state, and this plunger end face and the first gland interior edge face remain on same end face.
5. as the fluid end unit of claim 1,2, one of 4 described reciprocating pumps, it is characterized in that the ring of described ring runner is provided with the outer shroud seal ring outward, ring seal ring in this ring runner and discharge opeing valve core chamber are provided with.
6. as the fluid end unit of reciprocating pump as described in the claim 5, it is characterized in that the sleeve of described stuffing box is a metal sleeve, described active chamber, first gland, holddown spring, second gland, ring assembly, baffle ring are installed in the metal sleeve.
7. as the fluid end unit of claim 1,2,4, one of 6 described multiple plunger pumps, it is characterized in that described first gland, second gland are wear-resistant metal material; Described ring assembly is the rubber-moulding Sealing of fiberfill fibers.
8. the fluid end unit of multiple plunger pump as claimed in claim 7 is characterized in that described first gland or second gland are aluminum bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200996075U CN201148968Y (en) | 2007-12-29 | 2007-12-29 | Hydraulic end unit of reciprocating plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200996075U CN201148968Y (en) | 2007-12-29 | 2007-12-29 | Hydraulic end unit of reciprocating plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201148968Y true CN201148968Y (en) | 2008-11-12 |
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ID=40116736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200996075U Expired - Fee Related CN201148968Y (en) | 2007-12-29 | 2007-12-29 | Hydraulic end unit of reciprocating plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201148968Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927280A (en) * | 2012-11-02 | 2013-02-13 | 宁波合力机泵有限公司 | Circulation balance sealing box assembly of plunger pump |
| CN103244406A (en) * | 2013-04-27 | 2013-08-14 | 天津市海盛泵业制造有限公司 | Three-cylinder plunger pump with integrated combined valves |
| USD691180S1 (en) | 2012-04-27 | 2013-10-08 | S.P.M. Flow Control, Inc. | Center portion of a fluid cylinder for a pump |
| US8662864B2 (en) | 2010-12-09 | 2014-03-04 | S.P.M. Flow Control, Inc. | Offset valve bore in a reciprocating pump |
| USD705817S1 (en) | 2012-06-21 | 2014-05-27 | S.P.M. Flow Control, Inc. | Center portion of a fluid cylinder for a pump |
| USD706397S1 (en) | 2011-08-19 | 2014-06-03 | S.P.M. Flow Control, Inc. | Portion of fluid end |
| USD706832S1 (en) | 2012-06-15 | 2014-06-10 | S.P.M. Flow Control, Inc. | Fluid cylinder for a pump |
| CN105545723A (en) * | 2016-01-15 | 2016-05-04 | 广州易邦环保工程有限公司 | High-pressure pump hydraulic end device |
| US9945362B2 (en) | 2012-01-27 | 2018-04-17 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| CN109253123A (en) * | 2018-11-15 | 2019-01-22 | 南通威而多专用汽车制造有限公司 | Automatic reciprocal cylinder for roadmarking |
| CN113294329A (en) * | 2021-07-01 | 2021-08-24 | 新凤鸣集团股份有限公司 | Plunger pump adopting coupling self-sealing packing |
| CN113719447A (en) * | 2021-09-28 | 2021-11-30 | 宝鸡航天动力泵业有限公司 | Quick-change sealing device for plunger pump and plunger pump |
| CN117231492A (en) * | 2022-06-07 | 2023-12-15 | 马俊 | Low-pressure chromatographic plunger pump |
-
2007
- 2007-12-29 CN CNU2007200996075U patent/CN201148968Y/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9989044B2 (en) | 2010-12-09 | 2018-06-05 | S.P.M. Flow Control, Inc. | Offset valve bore in a reciprocating pump |
| US8662864B2 (en) | 2010-12-09 | 2014-03-04 | S.P.M. Flow Control, Inc. | Offset valve bore in a reciprocating pump |
| US8662865B2 (en) | 2010-12-09 | 2014-03-04 | S.P.M. Flow Control, Inc. | Offset valve bore in a reciprocating pump |
| US8668470B2 (en) | 2010-12-09 | 2014-03-11 | S.P.M. Flow Control, Inc. | Offset valve bore for a reciprocating pump |
| US9784262B2 (en) | 2010-12-09 | 2017-10-10 | S.P.M. Flow Control, Inc. | Offset valve bore in a reciprocating pump |
| USD706397S1 (en) | 2011-08-19 | 2014-06-03 | S.P.M. Flow Control, Inc. | Portion of fluid end |
| US11401930B2 (en) | 2012-01-27 | 2022-08-02 | Spm Oil & Gas Inc. | Method of manufacturing a fluid end block with integrated web portion |
| US10330097B2 (en) | 2012-01-27 | 2019-06-25 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| US9945362B2 (en) | 2012-01-27 | 2018-04-17 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| USD691180S1 (en) | 2012-04-27 | 2013-10-08 | S.P.M. Flow Control, Inc. | Center portion of a fluid cylinder for a pump |
| USD706833S1 (en) | 2012-04-27 | 2014-06-10 | S.P.M. Flow Control, Inc. | Center portion of a fluid cylinder for a pump |
| USD706832S1 (en) | 2012-06-15 | 2014-06-10 | S.P.M. Flow Control, Inc. | Fluid cylinder for a pump |
| USD705817S1 (en) | 2012-06-21 | 2014-05-27 | S.P.M. Flow Control, Inc. | Center portion of a fluid cylinder for a pump |
| CN102927280A (en) * | 2012-11-02 | 2013-02-13 | 宁波合力机泵有限公司 | Circulation balance sealing box assembly of plunger pump |
| CN102927280B (en) * | 2012-11-02 | 2015-07-08 | 宁波合力机泵有限公司 | Circulation balance sealing box assembly of plunger pump |
| CN103244406A (en) * | 2013-04-27 | 2013-08-14 | 天津市海盛泵业制造有限公司 | Three-cylinder plunger pump with integrated combined valves |
| CN103244406B (en) * | 2013-04-27 | 2016-02-03 | 天津市海盛泵业制造有限公司 | With the three-cylinder plunger pump of integral type combination brake switch and proporting |
| CN105545723A (en) * | 2016-01-15 | 2016-05-04 | 广州易邦环保工程有限公司 | High-pressure pump hydraulic end device |
| CN109253123A (en) * | 2018-11-15 | 2019-01-22 | 南通威而多专用汽车制造有限公司 | Automatic reciprocal cylinder for roadmarking |
| CN109253123B (en) * | 2018-11-15 | 2023-09-08 | 南通威而多专用汽车制造有限公司 | Automatic reciprocating oil cylinder for road marking |
| CN113294329A (en) * | 2021-07-01 | 2021-08-24 | 新凤鸣集团股份有限公司 | Plunger pump adopting coupling self-sealing packing |
| CN113719447A (en) * | 2021-09-28 | 2021-11-30 | 宝鸡航天动力泵业有限公司 | Quick-change sealing device for plunger pump and plunger pump |
| CN117231492A (en) * | 2022-06-07 | 2023-12-15 | 马俊 | Low-pressure chromatographic plunger pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20151229 |