CN208089512U - A kind of diaphragm pump - Google Patents
A kind of diaphragm pump Download PDFInfo
- Publication number
- CN208089512U CN208089512U CN201820410843.2U CN201820410843U CN208089512U CN 208089512 U CN208089512 U CN 208089512U CN 201820410843 U CN201820410843 U CN 201820410843U CN 208089512 U CN208089512 U CN 208089512U
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- inlet
- cavity
- liquid
- way valve
- 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
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model discloses a kind of diaphragm pumps, including power part and offset assembly, the output end of power part connects offset assembly, it further include drive end bearing bracket, liquid in-out partition board, valve seat and diaphragm pressing plate, drive end bearing bracket, liquid in-out partition board, valve seat and diaphragm pressing plate are fixedly connected sequentially, diaphragm cavity is provided in valve seat, the inner side and outer side of valve seat is respectively arranged with inlet one-way valve and Outlet check valves, inlet one-way valve, Outlet check valves are covered each by arrival end and the outlet end of diaphragm cavity, it is socketed with diaphragm in diaphragm pressing plate, diaphragm face inlet one-way valve, diaphragm support block is fixed on offset assembly；Inlet one-way valve and Outlet check valves is respectively set in the inside of valve seat, outside in the utility model diaphragm pump, inlet opening is set at the covering of inlet one-way valve, fluid hole is set at the covering of Outlet check valves, fluid hole is located at the periphery of inlet opening, facilitate the outflow of diaphragm chamber air and liquid, the waste of liquid is reduced, while ensureing the discharge stability and accuracy of diaphragm pump.
Description
Technical field
The utility model is related to fluid machines technical field more particularly to a kind of diaphragm pumps.
Background technology
Currently, in field of biological pharmacy, wriggling flow rate pump is unstable, and pulse flow changes greatly；Plunger pump, which is not achieved, to be defended
Raw standard, cannot meet requirement of the user by GMP；The shearing force of centrifugal pump is larger, is easily destroyed the activity of biomolecule；It is single
Diaphragm pump pulse flow changes greatly, and the failure rate of check valve is higher, and maintenance cost is higher.Above-mentioned various pumps are all difficult to meet
Biopharmaceutical Enterprises user demand.
Authorization Notice No. CN 202326123U disclose " a kind of quaternary diaphragm pump ", including complement each other to form chamber
Front cavity and pump rear chamber, power part, eccentric shaft, bevel wheel and arrays of membranes are pumped, the wherein output end of power part is logical
It crosses eccentric shaft with bevel wheel to be connected, arrays of membranes is set between bevel wheel and the inside for pumping rear chamber and the diaphragm of arrays of membranes
Towards pump rear chamber, inlet one-way valve and Outlet check valves is respectively set in the inner side and outer side for pumping rear chamber in outside.Entrance is unidirectional
And the two quantity facing each other on the outside of diaphragm is identical on the outside of the valve block of valve, and Outlet check valves are located at the middle part of pump rear chamber.On
The Outlet check valves for stating diaphragm pump are arranged in the middle part of pump rear chamber, and multiple diaphragm cavities share one outlet check valve, are transported in pump
After row, the liquid in diaphragm cavity, which remains in chamber, to be drained, and the waste of high value liquid, pump is not only caused also can not
It cleans up.Meanwhile the air in diaphragm cavity also is difficult to naturally drain, and can not only influence the discharge stability and accuracy of pump,
Also due to the indoor gas of diaphragm cavity and influence pump outlet pressure stability.
Utility model content
In order to solve the problems, such as existing diaphragm pump, there are diaphragm chamber airs and liquid to empty, the mesh of the utility model
Be to provide a kind of diaphragm pump.
To achieve the goals above, the utility model adopts the following technical solution：A kind of diaphragm pump, including power part and
The output end of offset assembly, the power part connects offset assembly, further includes drive end bearing bracket, liquid in-out partition board, valve seat and diaphragm
Pressing plate, the drive end bearing bracket, liquid in-out partition board, valve seat and diaphragm pressing plate are fixedly connected sequentially, the drive end bearing bracket and liquid in-out partition board
Side complements each other to form feed liquor cavity, and the liquid in-out partition board other side complements each other to form out sap cavity body with valve seat, described
Be provided at least one connection feed liquor cavity on liquid in-out partition board and go out the first inlet of sap cavity body, it is described go out sap cavity body in set
It is equipped with the first liquid outlet, at least one diaphragm cavity is provided in the valve seat, the inner side and outer side of the valve seat is respectively arranged with
The position one of at least one inlet one-way valve and at least one Outlet check valves, the inlet one-way valve and Outlet check valves is a pair of
It answers, the inlet one-way valve, Outlet check valves are covered each by arrival end and the outlet end of diaphragm cavity, the arrival end of the diaphragm cavity
It is connected to the first inlet, the Outlet check valves are located at the outlet end of diaphragm cavity and go out between sap cavity body, in the diaphragm pressing plate
It is socketed with diaphragm, the diaphragm face inlet one-way valve is fixed with diaphragm support block, the diaphragm support on the offset assembly
Block is fixedly connected with diaphragm.
The position of inlet one-way valve and Outlet check valves is set as corresponding, avoids multiple inlet one-way valves, single
Outlet check valves, Outlet check valves are in the middle part of valve seat, and the liquid in diaphragm cavity are occurred and the problem of air can not empty, subtracted
The waste for having lacked raw material, reduces production cost；Whole discharges of air simultaneously, ensure that the stability and flow of liquid flowing
Accuracy.
Diaphragm is fixedly connected by peripheral hardware screw thread or screw with the diaphragm support block on offset assembly, ensures that diaphragm can be with
Offset assembly to move back and forth.
Wherein, the drive end bearing bracket, be respectively equipped with first through hole at the top of liquid in-out partition board, two first through hole pass through
Position lock ring connection.
First through hole will be respectively set at the top of drive end bearing bracket, liquid in-out partition board, is connected first through hole by positioning lock ring,
It avoids diaphragm pump from occurring positional fault during the installation process, improves the convenience of installation.
Wherein, the material of the diaphragm, inlet one-way valve and Outlet check valves is rubber.
Wherein, the diaphragm cavity, inlet one-way valve, Outlet check valves are respectively four.
Wherein, a plurality of inlet openings are provided at the covering of each inlet one-way valve, at a plurality of inlet openings
In on same circumference, the inlet opening is connected with diaphragm cavity.
Wherein, a plurality of fluid holes are provided at the covering of each Outlet check valves, at a plurality of fluid holes
In on same circumference, the fluid hole is connected with diaphragm cavity, and the fluid hole is in the periphery of corresponding inlet opening.
Liquid enters diaphragm cavity from inlet opening, diaphragm cavity is discharged from fluid hole, fluid hole is in the periphery of inlet opening so that
The top and bottom end of inlet opening are both provided with fluid hole, are convenient for the discharge of air and liquid.
Wherein, circumference residing for a plurality of inlet openings is provided centrally with the second through-hole, and the inlet one-way valve includes
Fixed column and disk, the fixed column are located in the second through-hole.
When inlet one-way valve is by suction function, the disk of inlet one-way valve is moved to diaphragm direction, inlet one-way valve from
Drive fluid apertures into；When inlet one-way valve is squeezed effect, the disk of inlet one-way valve is moved to the direction far from diaphragm, entrance list
Be covered at inlet opening to valve, at the same time, Outlet check valves in by diaphragm cavity liquid be squeezed away from fluid hole, in diaphragm cavity
Liquid be discharged through fluid hole.
Wherein, the Outlet check valves are annular plate valve.
Wherein, the offset assembly includes eccentric shaft, eccentric disc and eccentric disc anchor ear, and the output end of the power part is logical
Eccentric axis connection eccentric disc is crossed, the eccentric disc outer sheath is equipped with eccentric disc anchor ear, and the diaphragm support block is fixed on eccentric disc
On anchor ear.
Power part acts on offset assembly, drives offset assembly rotation, since offset assembly is in eccentric state, eccentric group
Part every revolution can all convert rotary force to front and back reciprocal motive force, act on diaphragm support block, pass through diaphragm support block
Diaphragm is driven to move back and forth.
Diaphragm is moved to the direction far from inlet one-way valve, negative pressure is generated between diaphragm and inlet one-way valve, entrance is unidirectional
Valve moves, and inlet one-way valve leaves inlet opening, and liquid enters inlet opening by feed liquor cavity, is stored in diaphragm cavity；Every
Film move to close to the direction of inlet one-way valve, and inlet one-way valve is squeezed, and the liquid positioned at diaphragm cavity is by Outlet check valves
It opens, liquid is discharged from diaphragm cavity.
Power part therein is motor, pulley, diesel engine or internal combustion engine.
Compared with prior art, advantageous effect of the utility model：The utility model diaphragm pump the inside of valve seat,
Inlet one-way valve and Outlet check valves is respectively set in outside, and inlet opening is arranged at the covering of inlet one-way valve, Outlet check valves
Fluid hole is set at covering, and fluid hole is located at the periphery of inlet opening, facilitates the outflow of diaphragm chamber air and liquid, reduces liquid
Waste, while ensureing the discharge stability and accuracy of diaphragm pump.
Description of the drawings
The utility model is further described below in conjunction with the drawings and specific embodiments：
Fig. 1 is the explosive view of the utility model diaphragm pump；
Fig. 2 is the sectional view of the utility model diaphragm pump；
Fig. 3 be in the utility model diaphragm pump liquid in-out partition board close to the structural schematic diagram of drive end bearing bracket side；
Fig. 4 is structural schematic diagram of the liquid in-out partition board far from drive end bearing bracket side in the utility model diaphragm pump.
Fig. 5 is the structural schematic diagram of import check valve in the utility model diaphragm pump；
Fig. 6 is the structural schematic diagram of the utility model diaphragm pump middle outlet check valve；
Fig. 7 is the structural schematic diagram of valve seat in the utility model diaphragm pump；Fig. 8 is eccentric group in the utility model diaphragm pump
The explosive view of part；
Fig. 9 is the annexation figure of offset assembly and diaphragm in the utility model diaphragm pump；
Figure 10 is the sectional view of Fig. 9.
Wherein：Offset assembly 1, drive end bearing bracket 2, liquid in-out partition board 3, valve seat 4, diaphragm pressing plate 5, diaphragm cavity 6, inlet one-way valve
7, Outlet check valves 8, diaphragm 9, diaphragm support block 10, inlet opening 13, fluid hole 14, the second through-hole 15, fixed column 16, disk
17, eccentric shaft 18, eccentric disc 19, eccentric disc anchor ear 20, feed liquor cavity 21 goes out sap cavity body 22, the first liquid outlet 23, the second feed liquor
Mouth 24, the first cavity 25, the second cavity 26, the first inlet 27, annular housing 28, annular projection 29.
Specific implementation mode
Such as Fig. 1,2, a kind of diaphragm pump, including drive end bearing bracket 2, liquid in-out partition board 3, valve seat 4, diaphragm pressing plate 5, offset assembly 1
And power part, drive end bearing bracket 2, liquid in-out partition board 3, valve seat 4 and diaphragm pressing plate 5 are fixedly connected sequentially, drive end bearing bracket 2 and liquid in-out every
3 side of plate complements each other to form feed liquor cavity 21, and 3 other side of liquid in-out partition board complements each other to form out sap cavity body 22 with valve seat 4,
Go out in sap cavity body 22 to be provided with the first liquid outlet 23,4 diaphragm cavities 6, the inner side and outer side difference of valve seat 4 are provided in valve seat 4
It is provided with 4 inlet one-way valves 7 and 4 Outlet check valves 8, the position of inlet one-way valve 7 and Outlet check valves 8 corresponds,
Inlet one-way valve 7, Outlet check valves 8 are covered each by arrival end and the outlet end of diaphragm cavity 6, and diaphragm is socketed in diaphragm pressing plate 5
9,9 face inlet one-way valve 7 of diaphragm is fixed with diaphragm support block 10 on offset assembly 1, and diaphragm support block 10 is fixed with diaphragm 9
Connection.
The liquid of external world's storage is acted on the second inlet 24 entrance through drive end bearing bracket 2 by the pump housing and is stored in feed liquor cavity
In 21.Power part drives offset assembly 1 to rotate, and since offset assembly 1 is in eccentric state, 1 every revolution of offset assembly all can
Convert rotary force to the motive force of front-rear reciprocation movement, act on diaphragm support block 10, by diaphragm support block 10 drive every
Film 9 moves back and forth.When being moved to the direction far from inlet one-way valve 7 when diaphragm 9, produced between diaphragm 9 and inlet one-way valve 7
Raw negative pressure, inlet one-way valve 7 move, and inlet one-way valve 7 leaves the arrival end of diaphragm cavity 6, are located in feed liquor cavity 21
Liquid flows into diaphragm cavity 6；When diaphragm 9 close to the direction of inlet one-way valve 7 to when moving, diaphragm 9 to inlet one-way valve 7 and every
Liquid in membrane cavity 6 generates extruding, and inlet one-way valve 7 is close to the arrival end of diaphragm cavity 6, and Outlet check valves 8 are by diaphragm cavity 6
Liquid squeezes the outlet end far from diaphragm cavity 6, and liquid flows out diaphragm cavity 6 through outlet end, into going out sap cavity body 22, and goes out through first
Liquid mouth 23 is discharged.
Such as Fig. 3,4, the first cavity 25 is arranged close to the side of drive end bearing bracket 2 in liquid in-out partition board 3, drive end bearing bracket 2 and liquid in-out every
After plate 3 is fixedly connected, the first cavity 25 forms closed space, constitutes feed liquor cavity 21；Be provided on first cavity 25 4 with every
The second cavity 26 is arranged close to the side of valve seat 4 in corresponding first inlet 27 of 6 incoming-side location of membrane cavity, liquid in-out partition board 3,
First inlet 27 is connected to the first cavity 25 and the second cavity 26, the first liquid outlet 23 are located at the bottom end of the second cavity 26, passes in and out
After liquid partition board 3 is fixedly connected with valve seat 4, the second cavity 26 forms closed space, constitutes out sap cavity body 22.
Such as Fig. 7, the periphery that 4 groups of inlet openings, 13,4 groups of inlet openings 13 are symmetrically arranged in valve seat 4 is respectively arranged with 4 groups and goes out liquid
Hole 14, every group of inlet opening 13 is 6, and 6 inlet openings 13 are on same circumference, and the center of 6 13 place circumference of inlet opening is set
It is equipped with the second through-hole 15.Every group of fluid hole 14 is multiple, and multiple fluid holes 14 are on same circumference.Every group of inlet opening 13 with it is every
Annular housing 28 is provided between group fluid hole 14, inlet opening 13 and fluid hole 14 are all through-hole.
Such as Fig. 5, inlet one-way valve 7 includes fixed column 16 and disk 17, and fixed column 16 is located in the second through-hole 15.
Such as Fig. 6, Outlet check valves 8 are annular plate valve.Being provided at the inner ring of Outlet check valves 8 makes with the cooperation of annular housing 28
Annular projection 29.
Such as Fig. 8,9,10, offset assembly 1 includes eccentric shaft 18, eccentric disc 19 and eccentric disc anchor ear 20, power part it is defeated
Outlet connects eccentric disc 19 by eccentric shaft 18, and 19 outer sheath of eccentric disc is equipped with eccentric disc anchor ear 20, consolidates on eccentric disc anchor ear 20
Surely there are diaphragm support block 10, diaphragm 9 to be fixedly connected with diaphragm support block 10, it is past to ensure that diaphragm 9 can be carried out with offset assembly 1
Multiple movement.
Power part drives eccentric disc 19 to rotate by eccentric shaft 18, since eccentric disc 19 is in eccentric state, eccentric disc 19
Every revolution converts rotary force to front and back reciprocal motive force, acts on diaphragm support block 10, pass through 10 band of diaphragm support block
Dynamic diaphragm 9 moves back and forth.When direction of the diaphragm 9 far from inlet one-way valve 7 is moved, between diaphragm 9 and inlet one-way valve 7
Negative pressure is generated, inlet one-way valve 7 is driven to move, inlet one-way valve 7 leaves inlet opening 13, and liquid is through feed liquor cavity 21, inlet opening
13 enter diaphragm cavity 6；When diaphragm 9 is moved close to the direction of inlet one-way valve 7, diaphragm 9 generates extruding to inlet one-way valve 7,
Outlet check valves 8 are opened in the effect of being squeezed of liquid in diaphragm cavity 6, and liquid flows out diaphragm cavity 6 through fluid hole 14, are entered
Go out sap cavity body 22.
Wherein, power part is selected from motor, pulley, diesel engine or internal combustion engine.
The above specific embodiments are only exemplary, is to preferably make skilled artisans appreciate that originally
Patent, be not to be construed as include to this patent range limitation；As long as appointing according to made by spirit disclosed in this patent
How with change or modification, the range that this patent includes is each fallen within.
Claims (9)
1. a kind of diaphragm pump, including power part and offset assembly（1）, the output end connection offset assembly of the power part
（1）, which is characterized in that further include drive end bearing bracket（2）, liquid in-out partition board（3）, valve seat（4）With diaphragm pressing plate（5）, the drive end bearing bracket
（2）, liquid in-out partition board（3）, valve seat（4）With diaphragm pressing plate（5）It is fixedly connected sequentially, the drive end bearing bracket（2）With liquid in-out partition board
（3）Side complements each other to form feed liquor cavity（21）, the liquid in-out partition board（3）The other side and valve seat（4）It complements each other to form
Go out sap cavity body（22）, the liquid in-out partition board（3）On be provided at least one connection feed liquor cavity（21）With go out sap cavity body（22）
The first inlet（27）, it is described go out sap cavity body（22）Inside it is provided with the first liquid outlet（23）, the valve seat（4）Inside be provided with to
A few diaphragm cavity（6）, the valve seat（4）Inner side and outer side be respectively arranged at least one inlet one-way valve（7）At least
One outlet check valve（8）, the inlet one-way valve（7）And Outlet check valves（8）Position correspond, the entrance is unidirectional
Valve（7）, Outlet check valves（8）It is covered each by diaphragm cavity（6）Arrival end and outlet end, the diaphragm cavity（6）Arrival end connect
Logical first inlet（27）, the Outlet check valves（8）Positioned at diaphragm cavity（6）Outlet end and go out sap cavity body（22）Between, institute
State diaphragm pressing plate（5）Inside it is socketed with diaphragm（9）, the diaphragm（9）Face inlet one-way valve（7）, the offset assembly（1）It is upper solid
Surely there is diaphragm support block（10）, the diaphragm support block（10）With diaphragm（9）It is fixedly connected.
2. diaphragm pump as described in claim 1, which is characterized in that the drive end bearing bracket（2）, liquid in-out partition board（3）Top part
Not She You first through hole, two first through hole pass through position lock ring connection.
3. diaphragm pump as described in claim 1, which is characterized in that the diaphragm（9）, inlet one-way valve（7）It is unidirectional with outlet
Valve（8）Material be rubber.
4. diaphragm pump as described in claim 1, which is characterized in that the diaphragm cavity（6）, inlet one-way valve（7）, outlet it is unidirectional
Valve（8）Respectively four.
5. diaphragm pump as claimed in claim 4, which is characterized in that each inlet one-way valve（7）Covering at be provided with
A plurality of inlet openings（13）, a plurality of inlet openings（13）On same circumference, the inlet opening（13）With diaphragm cavity（6）
It is connected.
6. diaphragm pump as claimed in claim 4, which is characterized in that each Outlet check valves（8）Covering at be provided with
A plurality of fluid holes（14）, a plurality of fluid holes（14）On same circumference, the fluid hole（14）With diaphragm cavity（6）
It is connected, the fluid hole（14）In corresponding inlet opening（13）Periphery.
7. diaphragm pump as claimed in claim 6, which is characterized in that a plurality of inlet openings（13）The center of residing circumference is set
It is equipped with the second through-hole（15）, the inlet one-way valve（7）Including fixed column（16）And disk（17）, the fixed column（16）It is located at
Second through-hole（15）It is interior.
8. diaphragm pump as described in claim 1, which is characterized in that the Outlet check valves（8）For annular plate valve.
9. diaphragm pump as described in claim 1, which is characterized in that the offset assembly（1）Including eccentric shaft（18）, eccentric disc
（19）With eccentric disc anchor ear（20）, the output end of the power part passes through eccentric shaft（18）Connect eccentric disc（19）, described inclined
Cartridge（19）Outer sheath is equipped with eccentric disc anchor ear（20）, the diaphragm support block（10）It is fixed on eccentric disc anchor ear（20）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820410843.2U CN208089512U (en) | 2018-03-26 | 2018-03-26 | A kind of diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820410843.2U CN208089512U (en) | 2018-03-26 | 2018-03-26 | A kind of diaphragm pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208089512U true CN208089512U (en) | 2018-11-13 |
Family
ID=64060519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820410843.2U Active CN208089512U (en) | 2018-03-26 | 2018-03-26 | A kind of diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208089512U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944781A (en) * | 2019-04-30 | 2019-06-28 | 深圳市博威克斯科技有限公司 | A kind of dual head diaphragm pump |
| CN110131139A (en) * | 2019-05-31 | 2019-08-16 | 广州达辉机械有限公司 | A kind of multicell constant-flow diaphragm pumps |
| CN111472959A (en) * | 2020-03-12 | 2020-07-31 | 卡川尔流体科技(上海)有限公司 | Durable double-channel anti-corrosion diaphragm pump |
-
2018
- 2018-03-26 CN CN201820410843.2U patent/CN208089512U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944781A (en) * | 2019-04-30 | 2019-06-28 | 深圳市博威克斯科技有限公司 | A kind of dual head diaphragm pump |
| CN110131139A (en) * | 2019-05-31 | 2019-08-16 | 广州达辉机械有限公司 | A kind of multicell constant-flow diaphragm pumps |
| CN110131139B (en) * | 2019-05-31 | 2024-06-11 | 广州达辉机械有限公司 | Multi-chamber constant-flow diaphragm pump |
| CN111472959A (en) * | 2020-03-12 | 2020-07-31 | 卡川尔流体科技(上海)有限公司 | Durable double-channel anti-corrosion diaphragm pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208089512U (en) | A kind of diaphragm pump | |
| JP7446702B2 (en) | Diaphragm pump | |
| CN219911096U (en) | Eight-cylinder diaphragm-driven pumping diaphragm pump | |
| US9951764B2 (en) | High-efficiency double-intake air pump | |
| WO2022134594A1 (en) | Diaphragm booster pump head, diaphragm booster pump, water treatment device and working method of pump head | |
| CN107461319B (en) | Diaphragm type oilless vacuum pump | |
| CN109944781A (en) | A kind of dual head diaphragm pump | |
| CN101666308B (en) | Reciprocating rubber diaphragm hydraulic pump | |
| CN111486085A (en) | Diaphragm booster pump | |
| CN204402808U (en) | A kind of micro pump with two barrier film | |
| CN212508787U (en) | Multi-outlet micropump for closed liquid bottle | |
| CN214145867U (en) | Micropump with multiple liquid outlets | |
| CN211573759U (en) | Anti-backflow sealing assembly and diaphragm pump | |
| CN2202204Y (en) | Double-stage rotary vane vacuum pump | |
| CN209414118U (en) | A kind of dual head diaphragm pump | |
| CN212418352U (en) | Separation and purification device for alkaloid extraction | |
| CN212055108U (en) | Mechanical baffle single cam displacement pump | |
| CN210239957U (en) | Multi-chamber constant-flow diaphragm pump | |
| CN212318262U (en) | Diaphragm booster pump | |
| CN217518830U (en) | Compact large-flow diaphragm liquid pump | |
| CN111889232A (en) | Separation and purification device for alkaloid extraction | |
| CN111734611A (en) | Flow-controllable liquid pump and working method thereof | |
| CN214837152U (en) | Water outlet mechanism of vertical multistage centrifugal pump | |
| JPH06147102A (en) | Multi-connection type non-pulsation fixed quantity pump | |
| CN219932416U (en) | Intelligent miniature five-cylinder pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |