CN105822518B - A kind of plunger type oil membrane pump - Google Patents
A kind of plunger type oil membrane pump Download PDFInfo
- Publication number
- CN105822518B CN105822518B CN201610327253.9A CN201610327253A CN105822518B CN 105822518 B CN105822518 B CN 105822518B CN 201610327253 A CN201610327253 A CN 201610327253A CN 105822518 B CN105822518 B CN 105822518B
- Authority
- CN
- China
- Prior art keywords
- plunger
- valve
- box body
- stuffing box
- main
- 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.)
- Active
Links
Classifications
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
-
- 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
- F04B53/02—Packing the free space between cylinders and pistons
-
- 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
- F04B53/04—Draining
-
- 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
- F04B53/1002—Ball valves
Abstract
The present invention relates to a kind of plunger type oil membrane pump, including fluid end and power end, fluid end includes pump assembly, the plunger (2) being arranged in pump assembly, for fixing the fluid cylinder support (14) of pump assembly, wherein fluid cylinder support (14) is assembled together for fixing fluid end with power end fuselage, wherein pump assembly includes the pump housing (1), plunger channel is provided with the pump housing (1), plunger is movably arranged in plunger channel, sealed letter body component is provided between plunger and plunger channel, it is characterised in that：The front end of plunger channel is provided with main seal cavity, the rear end of plunger channel is provided with auxiliary seal cavity, sealed letter body component includes the main stuffing box body component being arranged in main seal cavity, with the secondary stuffing box body component being arranged in auxiliary seal cavity, the oil sump for being used for separating main stuffing box body and secondary stuffing box body is provided with plunger channel between the main stuffing box body and secondary stuffing box body, lubricating oil (21) is provided with the oil sump.The present invention can realize medium No leakage, plunger processing convenient disassembly.
Description
Technical field
The invention belongs to technical field of mechanical automation, and in particular to one kind can convey the plunger of hazardous medium (such as methanol)
Formula oil membrane pump.
Background technology
Traditional plunger type metering pump medium-tight position is by plunger, filler, guide sleeve, packing press ring, adjusting nut group
Into, as shown in Figure 1, there are the seal forms such as V-arrangement, U-shaped, rectangle to form one group of band, as filler wears, pressure increases,
Medium can be leaked to directly in fluid cylinder from filler and plunger, be water or nontoxic liquid to pumped (conveying) medium, this leakage is
Allow, as long as leakage rate is no more than national Specification, micro leakage or even can improve making for plunger and filler
Use the life-span.But to conveying this hazardous medium of methanol, the caused leakage in seal clearance place of plunger and filler, definitely can not
Exposure is in an atmosphere.So medium typically as conveying methanol, can use the diaphragm metering pump of accompanying drawing 2.Diaphragm metering pump
Separate medium methanol and airtight and watertight padding by barrier film, reach zero leakage, but typically manufacture diaphragm metering pump processing cost compared with
Height, processing technology and required precision are also very high, and the adjustment of especially three valves is cumbersome, professional very strong, and general user is difficult behaviour
Make, and the diaphragm life-span is not grown, and changes diaphragm dismounting inconvenience, can also reveal a large amount of medium methanol during it.So, there is provided it is a kind of
Without leakage, the plunger type oil diaphragm metering pump for processing convenient disassembly is just particularly important.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of No leakage, processing convenient disassembly for above-mentioned prior art
Plunger type oil membrane pump.
Technical scheme is used by the present invention solves above-mentioned technical problem：A kind of plunger type oil membrane pump, including fluid power
End and power end, fluid end include pump assembly, the plunger being arranged in pump assembly, for fixing the fluid cylinder branch of pump assembly
Frame, wherein fluid cylinder support are assembled together for fixing whole fluid end, wherein the pump assembly includes with power end fuselage
The pump housing, is movably arranged on provided with plunger channel and valve group passage connect with plunger, plunger in plunger channel in the pump housing, plunger and
Sealed letter body component is provided between plunger channel, it is characterised in that：The front end of the plunger channel is provided with main seal cavity, described
The rear end of plunger channel is provided with auxiliary seal cavity, and the sealed letter body component includes the main stuffing box body group being arranged in main seal cavity
Part, and the secondary stuffing box body component being arranged in auxiliary seal cavity, the plunger between the main stuffing box body and secondary stuffing box body lead to
The oil sump for being used for separating main stuffing box body and secondary stuffing box body is provided with road, lubricating oil is provided with the oil sump.
As an improvement, being provided with the backflow valve pocket connected with oil sump on the pump housing, the return valve intracavitary is provided with return valve
Component, the entrance for the valve module that flows back connect with oil sump, and the outlet for the valve module that flows back connects with valve group passage.
Improve again, the backflow valve module includes valve ball, valve bonnet, valve spring, plug screw support and plug screw, and wherein valve ball first fills
In the backflow valve pocket for entering the pump housing, valve bonnet in rear enclosure, valve spring is placed into, finally screw in plug screw support and withstand valve spring, last pump
Fabrication hole on body outside backflow valve pocket is blocked with plug screw.
Preferably, the opening pressure of the backflow valve module is 0.8~1.2MPa.
Improve again, be provided with the deflation valve chamber connected with oil sump on the pump housing or outside the pump housing, vent valve intracavitary is provided with
Manual deflation component, deflation component includes deflation valve ball and the air relief cock to be offseted with deflation valve ball manually for this.
Improve again, the main stuffing box body component includes main pressure ring, primary seal filler and main guide sleeve, and main pressure ring, master are close
Packing material and main guide sleeve are sequentially loaded into after the main seal cavity of pump housing front end, are fixed on gland in main seal cavity.
Improve again, the gland outer ring is provided with seal groove, is provided with seal groove close between gland and the pump housing for realizing
The sealing ring and back-up ring of envelope.
Improving again, the plunger imports from pump housing front end, is penetrated from main stuffing box body component and secondary stuffing box body inter-module,
It is fitted into the positioning hole of crosshead, then the rear end of fluid cylinder support is fixed on the positioning oblique locking of spiral pin, crosshead；Pump housing front end
Flange is covered, is locked with hex nut and studs, the middle part of flange screws in regulating bolt and withstands gland.
Improve again, medium suction inlet and medium outlet are provided with the valve group passage.
Improve again, the secondary stuffing box body component includes secondary guide sleeve, secondary sealing filler and secondary pressure ring, and guide sleeve, pair are close
After packing material and secondary pressure ring are sequentially loaded into the auxiliary seal cavity of pump housing rear end, it is threadedly coupled with adjusting nut and pump housing rear end
Compared with prior art, the advantage of the invention is that：By setting the main stuffing box body of two level and forming an oil sump
The sealing of (oily diaphragm cavity) to medium creates a good condition with leakage-preventing, realizes to major and minor two level stuffing box body
Component leakage medium (methanol) is sealed up for safekeeping；In further scheme, seal pressure up for safekeeping when medium and be more than backflow valve module inlet pressure
When automatic back flow, run because plunger steeps with major and minor two level filler assembly in oil lubrication, air-proof condition is superior, frictional work
Minimum, long lifespan is consumed, reaches the purpose that the medium (methanol) zero in secondary packing seal component is revealed.
Brief description of the drawings
Fig. 1 is traditional plunger type metering pump structural representation；
Fig. 2 is conventional membrane formula measuring pump structural representation；
Fig. 3 is plunger type oil diaphragm pump structure schematic diagram in the embodiment of the present invention one；
Fig. 4 is plunger type oil diaphragm pump structure schematic diagram in the embodiment of the present invention two.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment one
Plunger type oil membrane pump as shown in Figure 3, including fluid end and power end, wherein fluid end include：Including fluid cylinder
Support 14；Crosshead 13, positioning spiral pin 17, plunger 2；Adjusting nut 12, secondary pressure ring 11, secondary filler 10, secondary guide sleeve 9；Machine oil
21st, medium (methanol) 22；Manual air-release valves component 15：Air relief cock 151, valve ball 152, valve chamber 153, sealing gasket 154；The pump housing 1, circle
Pin 18, locking nut 16；Flow back valve module 19：Valve ball 191, valve bonnet 192, valve spring 193, plug screw support 194, plug screw 20；
Main pressure ring 4, main filler 5, main guide sleeve 3, gland 6, O-ring 601, back-up ring 602, regulating bolt 8, flange 7, hex nut 701,
Studs 702.
The fluid cylinder support 14 assembles with power end fuselage, for fixing whole fluid end.
It is movably arranged in the pump housing 1 provided with plunger channel and the valve group passage connected with plunger, plunger in plunger channel, post
Sealed letter body component is provided between plug and plunger channel；The pump housing 1 with sealed letter body component is combined integrated turns into pump assembly, pump
Body component is put among fluid cylinder support 14, then passes the prelocalization hole of fluid cylinder support 14, between positioned with straight pin 18, Ran Hou
The prelocalization outer end of hole of fluid cylinder support 14 at locking nut 16 and the front end outward buckle screw thread of the pump housing 1 with screwing.
The front end of the plunger channel is provided with main seal cavity, and the rear end of the plunger channel is provided with auxiliary seal cavity, described close
Packing body component includes the main stuffing box body component being arranged in main seal cavity, and the secondary stuffing box body being arranged in auxiliary seal cavity
Component, interior be provided with of plunger channel between the main stuffing box body and secondary stuffing box body are used to separate main stuffing box body and secondary filler
The oil sump of letter body, the oil sump is interior to be provided with lubricating oil 21.
The secondary stuffing box body component includes secondary guide sleeve 9, secondary filler 10, that secondary pressure ring 11 is sequentially loaded into pump housing rear end pair is close
Seal after chamber, with being screwed at adjusting nut 12 and the rear end outward buckle screw thread of the pump housing 1, to adjust filler.
The main stuffing box body component includes main pressure ring 4, main filler 5, that main guide sleeve 3 is sequentially loaded into the front end master of the pump housing 1 is close
Seal after chamber, plunger 2 imports from the front end of the pump housing 1, is penetrated between main packing seal and secondary packing seal, loads the positioning of crosshead 13
Kong Zhong, then with positioning 17 oblique locking of spiral pin；During to tear plunger 2 open, then positioning spiral pin 17 need to be only screwed out, is drawn from the front end of the pump housing 1
Go out plunger 2, remove plunger type metering pump from and diaphragm metering pump tears plunger open and must tear the pump housing open, it is more convenient to be allowed to dismounting；It
The front end of the pump housing 1 is reloaded into gland 6 afterwards, wherein in the seal groove of O-ring 601 and back-up ring 602 loaded on the outer ring of gland 6, with reach with
The purpose that the pump housing 1 seals；The last drive end bearing bracket upper flange 7 of the pump housing 1, with hex nut, 701 and studs 702 be locked, its
Centre screws in regulating bolt 8 and withstands gland 6, to reach the purpose of regulation primary seal filler.
The deflation valve chamber 153 connected with oil sump is provided with outside the pump housing, sealing gasket is used between deflation valve chamber 153 and the pump housing
154 sealings, vent valve intracavitary are provided with manual deflation component 15, and Manual air-release valves component 15 includes deflation valve ball 152 and with putting
The air relief cock 151 that air valve ball 152 offsets.When there being certain gas in oil sump, then air relief cock 151 is unscrewed, release unnecessary gas
Body；Before pump is opened, whole Manual air-release valves component 15 is screwed out, appropriate machine oil 21 is poured into submergence plunger 2, for lubricating plunger
2 with main stuffing box body component and secondary stuffing box body component.
Medium suction inlet and medium outlet are provided with the valve group passage；The upside of the pump housing 1 is provided with and oil sump
The backflow valve pocket of connection, the return valve intracavitary are provided with backflow valve module 19, and the entrance for the valve module that flows back connects with oil sump, return valve
The outlet of component connects with the medium suction inlet of valve group passage, and the backflow valve module 19 includes valve ball 191, valve bonnet 192, valve bullet
Spring 193, valve ball 191, valve bonnet 192, valve spring 193 are sequentially loaded into the pump housing 1 and flowed back in valve pocket, with the screwing hermetic of plug screw support 194,
The last front-end process hole plug screw 20 of the pump housing 1 blocks sealing；The opening pressure of backflow valve module 19 is 1MPa；When plunger type oil every
When the plunger 2 of membrane pump moves back and forth, medium (methanol) 22 sucks from suction inlet, then is discharged from outlet, when pressure increases therebetween,
Have a certain amount of medium (methanol) 22 to leak in the oil sump of the pump housing 1 at main stuffing box body component, due to medium (methanol) 22
Density ratio machine oil 21 is small, therefore medium (methanol) 22 can be floated on machine oil 21, and the medium (methanol) of leakage is slowly filled with whole oil
Pond residual cavity, when cavity pressure is more than 1MPa, backflow valve module 19 above can be opened, then float on machine oil 21
Medium (methanol) 22 flows into suction inlet by the valve module 19 that flows back, and is discharged into a certain amount of, when cavity pressure is less than 1MPa, then flows back
Valve module 19 is closed automatically；Because the pressure of intracavitary is consistently less than 1MPa, therefore the amount of leakage of secondary stuffing box body component is minimum, and
Reveal herein for machine oil 21, this leakage is allowed, as long as leakage rate is no more than national Specification, micro lets out
Leakage can even improve the service life of plunger and filler.
Embodiment two
Unlike embodiment one, due to the difference of medium, backflow valve pocket position is arranged on the downside of the pump housing 1, accordingly
Suction inlet is lower section, and outlet is top, shown in Figure 4.Specifically, the pumped (conveying) medium density ratio machine oil 21 of the embodiment
Greatly, therefore medium can be sunken to the lower section of machine oil 21, and the medium of leakage is slowly filled with whole oil sump residual cavity, when cavity pressure is more than
During 1MPa, underlying backflow valve module 19 can be opened, then be sunken to the lower dielectric of machine oil 21 and flowed into by the valve module 19 that flows back
Suction inlet, be discharged into it is a certain amount of, when cavity pressure is less than 1MPa, then flow back valve module 19 close automatically.Due to the pressure of intracavitary
Be consistently less than 1MPa, therefore the amount of leakage of secondary stuffing box body component is minimum, and reveal herein for machine oil 21, this leakage is fair
Perhaps, as long as leakage rate is no more than national Specification, micro leakage can even improve the use of plunger and filler
Life-span.
Claims (10)
1. a kind of plunger type oil membrane pump, including fluid end and power end, fluid end includes pump assembly, is arranged on pump assembly
Interior plunger (2), for fixing the fluid cylinder support (14) of pump assembly, wherein fluid cylinder support (14) is assemblied in power end fuselage
Be used to fix whole fluid end together, wherein the pump assembly include the pump housing (1), in the pump housing (1) provided with plunger channel and with
The valve group passage of plunger connection, plunger are movably arranged in plunger channel, and sealed letter body is provided between plunger and plunger channel
Component, it is characterised in that：The front end of the plunger channel is provided with main seal cavity, and the rear end of the plunger channel is provided with secondary sealing
Chamber, the sealed letter body component includes the main stuffing box body component being arranged in main seal cavity, and is arranged in auxiliary seal cavity
Secondary stuffing box body component, interior be provided with of plunger channel between the main stuffing box body component and secondary stuffing box body component are used to separate
The oil sump of main stuffing box body component and secondary stuffing box body component, the oil sump is interior to be provided with lubricating oil (21).
2. plunger type oil membrane pump according to claim 1, it is characterised in that：It is provided with the pump housing (1) and oil sump
The backflow valve pocket of connection, the return valve intracavitary are provided with backflow valve module (19), and the entrance for the valve module that flows back connects with oil sump, flow back
The outlet of valve module connects with valve group passage.
3. plunger type oil membrane pump according to claim 2, it is characterised in that：The backflow valve module (19) includes valve ball
(191), valve bonnet (192), valve spring (193), plug screw support (194) and plug screw (20), wherein valve ball (191) are initially charged with the pump housing
Flow back in valve pocket, valve bonnet (192) in rear enclosure, place into valve spring (193), finally screw in plug screw support (194) and withstand valve spring
(193), the fabrication hole on the last pump housing outside backflow valve pocket is blocked with plug screw (20).
4. plunger type oil membrane pump according to claim 3, it is characterised in that：The opening pressure of the backflow valve module (19)
Power is 0.8~1.2MPa.
5. the plunger type oil membrane pump according to any one claim in Claims 1 to 4, it is characterised in that：It is described
The deflation valve chamber (153) connected with oil sump is provided with the pump housing or outside the pump housing, vent valve intracavitary is provided with manual deflation component
(15), this deflation component includes deflation valve ball (152) and the air relief cock (151) that is offseted with deflation valve ball manually.
6. plunger type oil membrane pump according to claim 1, it is characterised in that：The main stuffing box body component includes main pressure
Ring (4), primary seal filler (5) and main guide sleeve (3), main pressure ring (4), primary seal filler (5) and main guide sleeve (3) are sequentially loaded into
After the main seal cavity of the pump housing (1) front end, it is fixed on gland (6) in main seal cavity.
7. plunger type oil membrane pump according to claim 6, it is characterised in that：Gland (6) outer ring is provided with seal groove,
The sealing ring (601) and back-up ring (602) for being used for realizing the sealing between gland and the pump housing are provided with seal groove.
8. the plunger type oil membrane pump according to claim 6 or 7, it is characterised in that：The plunger imports from pump front end, from
Main stuffing box body component penetrates with secondary stuffing box body inter-module, is fitted into the positioning hole of crosshead (13), then with positioning spiral pin
(17) oblique locking, crosshead (13) are fixed on the rear end of fluid cylinder support；The pump housing (1) drive end bearing bracket upper flange (7), uses hex nut
(701) it is locked with studs (702), the middle part of flange (7) screws in regulating bolt (8) and withstands gland (6).
9. plunger type oil membrane pump according to claim 1, it is characterised in that：Medium suction is provided with the valve group passage
Entrance and medium outlet.
10. plunger type oil membrane pump according to claim 1, it is characterised in that：The secondary stuffing box body component includes pair
Guide sleeve (9), secondary sealing filler (10) and secondary pressure ring (11), secondary guide sleeve (9), secondary sealing filler (10) and secondary pressure ring (11) according to
After the auxiliary seal cavity of secondary loading pump housing rear end, it is threadedly coupled with adjusting nut (12) and the pump housing (1) rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327253.9A CN105822518B (en) | 2016-05-17 | 2016-05-17 | A kind of plunger type oil membrane pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327253.9A CN105822518B (en) | 2016-05-17 | 2016-05-17 | A kind of plunger type oil membrane pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105822518A CN105822518A (en) | 2016-08-03 |
| CN105822518B true CN105822518B (en) | 2018-01-16 |
Family
ID=56529783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610327253.9A Active CN105822518B (en) | 2016-05-17 | 2016-05-17 | A kind of plunger type oil membrane pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105822518B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3199859B1 (en) * | 2016-01-29 | 2021-05-26 | Cryostar SAS | Submersible pump assembly for dispensing liquefied gas |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6623259B1 (en) * | 2002-05-06 | 2003-09-23 | George H. Blume | High pressure plunger pump housing and packing |
| CN101520037A (en) * | 2008-12-18 | 2009-09-02 | 浙江工业大学 | Synchronous-isolation plunger pump |
| CN102032170A (en) * | 2010-11-19 | 2011-04-27 | 宁波合力机泵有限公司 | Isolating device for plunger slurry pump |
| CN204663846U (en) * | 2015-03-27 | 2015-09-23 | 宁波合力机泵有限公司 | The fluid end of cylinder-and-piston type reciprocating pump and employing have the cylinder-and-piston type reciprocating pump of this fluid end |
| CN205779529U (en) * | 2016-05-17 | 2016-12-07 | 宁波合力机泵股份有限公司 | A kind of plunger type oil membrane pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006070717A (en) * | 2004-08-31 | 2006-03-16 | Morinaga Milk Ind Co Ltd | Plunger pump, sterile homogenizer and homogenization method of particle including liquid |
| US20110239856A1 (en) * | 2010-04-06 | 2011-10-06 | Tiller William J | Plunger Pump Lubrication System and Method |
-
2016
- 2016-05-17 CN CN201610327253.9A patent/CN105822518B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6623259B1 (en) * | 2002-05-06 | 2003-09-23 | George H. Blume | High pressure plunger pump housing and packing |
| CN101520037A (en) * | 2008-12-18 | 2009-09-02 | 浙江工业大学 | Synchronous-isolation plunger pump |
| CN102032170A (en) * | 2010-11-19 | 2011-04-27 | 宁波合力机泵有限公司 | Isolating device for plunger slurry pump |
| CN204663846U (en) * | 2015-03-27 | 2015-09-23 | 宁波合力机泵有限公司 | The fluid end of cylinder-and-piston type reciprocating pump and employing have the cylinder-and-piston type reciprocating pump of this fluid end |
| CN205779529U (en) * | 2016-05-17 | 2016-12-07 | 宁波合力机泵股份有限公司 | A kind of plunger type oil membrane pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105822518A (en) | 2016-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206019960U (en) | Lift non-return valve work seal detection means | |
| CN105822518B (en) | A kind of plunger type oil membrane pump | |
| CN106678405B (en) | high pressure self-closing valve | |
| CN205779529U (en) | A kind of plunger type oil membrane pump | |
| CN115388178A (en) | High-pressure throttle valve for oil exploitation | |
| CN103542150A (en) | Pressure reducing valve with valve closing function | |
| CN205895719U (en) | Buoyancy regulating device's interior oil tank is pressed to fluid | |
| CN108679280A (en) | Vibration proof pilot operated safety valve | |
| CN1975163A (en) | High-pressure hydraulic diaphragm metering pump | |
| CN209076163U (en) | A kind of filter Self-sealing valve | |
| US2894677A (en) | Rotary compressor control | |
| CN101718343A (en) | Non-leakage reversible automatic exhaust valve | |
| BRPI0706516A2 (en) | air release valve | |
| CN209654683U (en) | Automatic pressure balance device and closed water system | |
| CN103047458B (en) | Full-pressure high-speed exhausting air-supplying special valve | |
| CN106593858B (en) | A kind of reciprocating pump plunger packing sealing lubrication device | |
| RU90866U1 (en) | FLOATING LIQUID REGULATOR IN SEPARATOR | |
| FI57009B (en) | VALVE SPECIALIZED AND REGULATORING VALVE FOR TANKER | |
| CN211715402U (en) | Rubber membrane type pressure balance air guide sleeve | |
| CN2288997Y (en) | Mechanical fully automatic self-balanced air make-up pressure water supply device | |
| CN117537108B (en) | Quick and slow pumping double-flow high-vacuum angle valve | |
| CN112098015B (en) | Tunnel segment seam waterproof test device | |
| CN214063802U (en) | Pilot-operated type electromagnetic valve | |
| CN110159778A (en) | A kind of pressure limiting valve plunger and the engine oil pump pressure-limiting valve for avoiding pressure oscillation | |
| CN213809145U (en) | Piston direct-current water conservancy control valve capable of being maintained on line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 315105, integrity investment Road, Yinzhou District investment center, Ningbo, Zhejiang, Yinzhou 888 Applicant after: Ningbo Heli pump Limited by Share Ltd Address before: 315105 Yinzhou investment and entrepreneurship center, Ningbo, road, No. 888 Applicant before: Heli Mechanical Pump Co., Ltd., Ningbo City |
|
| COR | Change of bibliographic data | ||
| CB02 | Change of applicant information |
Address after: 315105 Yinzhou District investment and entrepreneurship center, Ningbo, road, No. 888 Applicant after: Ningbo Heli pump Limited by Share Ltd Address before: 315105, integrity investment Road, Yinzhou District investment center, Ningbo, Zhejiang, Yinzhou 888 Applicant before: Ningbo Heli pump Limited by Share Ltd |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |