CN106939896A - A kind of digital metering non-return centrifugal pump of high leakproofness - Google Patents
A kind of digital metering non-return centrifugal pump of high leakproofness Download PDFInfo
- Publication number
- CN106939896A CN106939896A CN201710306720.4A CN201710306720A CN106939896A CN 106939896 A CN106939896 A CN 106939896A CN 201710306720 A CN201710306720 A CN 201710306720A CN 106939896 A CN106939896 A CN 106939896A
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- Prior art keywords
- pump housing
- flow
- sealing ring
- pump
- flange
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- 238000007789 sealing Methods 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000006260 foam Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
- F04D15/0083—Protection against sudden pressure change, e.g. check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of digital metering non-return centrifugal pump of high leakproofness, including base, the pump housing, sealing mechanism, check-valves and flow-metering mechanism, axial one end of the pump housing is provided with pump housing flange；Sealing mechanism includes seal receptacle, the first sealing ring, the second sealing ring, pressure detection mechanism and governor motion, seal receptacle is arranged on the outer surface of the pump housing and sealed chamber is formed between the pump housing, seal receptacle is connected with pump housing flange, first sealing ring, the second sealing ring set in sealed chamber and are provided with pressure chamber therebetween, pressure detection mechanism is connected with pump body, and governor motion is connected with pressure chamber.The pressure detection mechanism of the present invention detects the pressure of pump body, and when the pressure of pump body exceedes certain value, governor motion is brought into close contact with the first sealing ring and the second sealing ring, it is to avoid seal failure, it is ensured that sealing effectiveness.Meanwhile, check-valves prevents that liquid from can flow back, and flow-metering mechanism is easy to measure feed flow.
Description
Technical field
The invention belongs to centrifugal pump technical equipment field, and in particular to a kind of digital metering non-return centrifugation of high leakproofness
Pump.
Background technology
Centrifugal pump（centrifugal pump）Refer to the centrifugal force produced when rotating by impeller to convey the pump of liquid.From
Heart pump is to be rotated using impeller and water is occurred centrifugal motion come work.Water pump is before activation, it is necessary to make pump case and suction hose
It is interior to be full of water, then start motor, pump shaft impeller and water is done high speed rotary motion, water occurs centrifugal motion, is thrown toward
Impeller outer edge, the runner through volute pump case flows into the pressure pipe road of water pump.
There is problems with centrifugal pump of the prior art：
The 1st, flange is installed, centrifugal pump plays a part of conveying liquid in use on the pump housing of centrifugal pump, and in liquid
In course of conveying, the species precipitate in liquid, which easily produces strength of fluid change and the change of liquid outlet quantity, to be influenceed in the pump housing
Portion's pressure, this requires there is preferable sealing property between flange and the pump housing.At present, generally sealed using sealing ring,
In the case of long-term pump body pressure change, sealing ring easily fails, and does not reach the effect of sealing.
2nd, centrifugal pump is without check-valves, and liquid can flow back after pump is closed, and cause impeller to overturn, nut will loosen, this
In the case of kind, water pump produces pressure, once cutting off the water, current are all depressed, and the vertical phenomenon of water occurs, and water pump can be overturn, impeller nut
It can loosen and drop, water pump will be damaged.So needing a kind of intelligent non-return centrifugal pump, check-valves has been added to prevent that impeller from inverting,
Liquid can be allowed slowly to flow back, impeller is not loosened, there is good protective effect to centrifugal pump, effectively extend making for centrifugal pump
With the life-span, the economic input in food production is reduced.
3rd, centrifugal pump can not carry out the metering of flow in use, and when centrifugal pump breaks down, its flow can go out
Now fluctuate, so that being normally carried out for production work is influenceed, so a kind of digital metering centrifugal pump is needed, can be to the defeated of centrifugal pump
Send flow to be measured, be easy to detect the working condition of delivery pump, while be easy to that flow is adjusted, it is good to reach
Good production control.
The content of the invention
To solve the defect that prior art is present, the present invention provides a kind of digital metering non-return centrifugal pump of high leakproofness.
In order to achieve the above object, technical scheme is as follows：
The present invention provides a kind of centrifugal pump with sealing mechanism, including base, the pump housing, sealing mechanism, check-valves and flow are surveyed
Measuring mechanism, the pump housing is arranged on base, and axial one end of the pump housing is provided with pump housing flange, and the side of the pump housing is provided with liquid outlet, only
Return valve to be arranged on liquid outlet, flow-metering mechanism is connected with check-valves；Sealing mechanism is arranged between pump housing flange and the pump housing,
Sealing mechanism includes seal receptacle, the first sealing ring, the second sealing ring, pressure detection mechanism and governor motion
, seal receptacle is arranged on the outer surface of the pump housing and sealed chamber formed between the pump housing, and seal receptacle is connected with pump housing flange,
First sealing ring, the second sealing ring are set in sealed chamber and are provided with pressure chamber therebetween, and the first sealing ring is sealedly attached to
Between pump housing flange and the pump housing, the second sealing ring is sealedly attached between seal receptacle and the pump housing, in pressure detection mechanism and the pump housing
Portion is connected, and governor motion is connected with pressure chamber.
Further, check-valves includes valve body, fixed plate, valve element, valve rod and spring, and the lower surface of valve body is provided with liquid
Entrance and lower valve body flange, the upper surface of valve body are provided with liquid outlet and upper valve body flange, and fixed plate is arranged in valve body, valve
Bar is arranged in the through hole of fixed plate, and valve element matches with liquid inlet and it is arranged on the lower surface of valve rod, is set on valve element
There are some return ports, spring housing is on valve rod and positioned between fixed plate and valve element.
Further, check-valves also includes anti-blocking plug assembly, and anti-blocking plug assembly includes connecting rod, guide post, scraper and led
To positioning wear-resistant sleeve, the upper surface of connecting rod is fixedly installed in fixed plate, and guide post is arranged on the lower surface of connecting rod, is led
It is assemblied in the bottom of bar in return port, scraper, guide-localization wear-resistant sleeve are from top to bottom set in turn in the annular side of guide post
On face.
Further, flow-metering mechanism includes flow measurement shell, flowmeter and dial plate, the lower end of flow measurement shell
Face is provided with down-off flange, and down-off flange is connected with upper valve body flange, and the upper surface of flow measurement shell is provided with upstream
Flange is measured, flowmeter is arranged in flow measurement shell, and dial plate is arranged at the outside of flow measurement shell and is connected with flowmeter.
Further, flow-metering mechanism also includes froth breaking component, and froth breaking component is arranged at the lower section of flowmeter, froth breaking group
Part includes two bearing bracket, two bearings, rotating shaft, column and blade, and two bearing bracket is relatively arranged in flow measurement shell, and bearing is set
It is placed in bearing block, rotating shaft is arranged between two bearings and its axle center is horizontally disposed, column and blade are arranged at the circumference of rotating shaft
On face.
Further, column is provided with some fine needles.
Beneficial effect：（1）Pressure detection mechanism detects the pressure of pump body, when the pressure of pump body exceedes certain value
When, governor motion is brought into close contact with the first sealing ring and the second sealing ring, it is to avoid seal failure, it is ensured that sealing effectiveness.
（2）Centrifugal pump rear check-valves out of service can prevent that the impulsive force of withdrawing fluid from invert the rotor of the pump housing, cause
Impeller nut loosens, and water pump is broken down, and liquid can flow back after solving centrifugal pump closing in the prior art, cause impeller
The problem of upset, nut loosening.
（3）Anti-blocking plug assembly is cleaned to return port, is solved because food liquid has concentration, viscosity and heavy slurry,
Backflow hole plug is easily influenceed into the problem of non-return centrifugal pump is normally run.
（4）Flow-metering mechanism is easy to measure feed flow in centrifugal pump conveying liquid process, solves existing
Have can not be realized in technology the metering to centrifugal pump feed flow, it is impossible to which the working condition to centrifugal pump is monitored well
Problem.
（5）Froth breaking component improves the stability that centrifugal pump conveys liquid, is easy to accurate metering of the flowmeter to flow, solves
Determine in the prior art because the property that centrifugal pump conveys liquid easily produces substantial amounts of foam, so as to influence the flowing speed of liquid
Degree, and then the problem of the metric results of influence flowmeter.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the structural representation of the sealing mechanism of the present invention.
Fig. 3 is the structural representation of the check-valves of the present invention.
Fig. 4 is the structural representation of the anti-blocking plug assembly of the present invention.
Fig. 5 is the structural representation of the flow-metering mechanism of the present invention.
Embodiment
To be easy to understand technological means, creation characteristic, reached purpose and effect of the invention realized, with reference to
Embodiment, is expanded on further the present invention.
As shown in figure 1, present embodiment provides a kind of centrifugal pump with sealing mechanism, including base, the pump housing 10, sealing
Mechanism, check-valves 30 and flow-metering mechanism 40, the pump housing 10 are arranged on base, and axial one end of the pump housing 10 is provided with pump housing flange
11, the side of the pump housing 10 is provided with liquid outlet, and check-valves 30 is arranged on liquid outlet, and flow-metering mechanism 40 connects with check-valves 30
Connect；Sealing mechanism is arranged between pump housing flange 11 and the pump housing 10.
As shown in Fig. 2 sealing mechanism includes seal receptacle 20, the first sealing ring 21, the second sealing ring 22, pressure detection mechanism
With governor motion 23, seal receptacle 20 is arranged on the outer surface of the pump housing 10 and sealed chamber, seal receptacle is formed between the pump housing 10
20 are connected with pump housing flange 11, and the first sealing ring 21, the second sealing ring 22 set in sealed chamber and be provided with pressure therebetween
Chamber, the first sealing ring 21 is sealedly attached between pump housing flange 11 and the pump housing 10, and the second sealing ring 22 is sealedly attached to seal receptacle
Between 20 and the pump housing 10, pressure detection mechanism is connected with the inside of the pump housing 10, and governor motion 23 is connected with pressure chamber.Pressure detecting machine
Structure detects the pressure of pump body, when the pressure of pump body exceedes certain value, governor motion and the first sealing ring and second
Sealing ring is brought into close contact, it is to avoid seal failure, it is ensured that sealing effectiveness.
Wherein, pressure detection mechanism is pressure sensor, and governor motion is ring-shaped gasbag and gases at high pressure generator, ring-type
Air bag is arranged in pressure chamber, and gases at high pressure generator is connected with ring-shaped gasbag, when pressure sensor exceedes certain value, high pressure
The gases at high pressure of gas generator generation are inflated into ring-shaped gasbag so that ring-shaped gasbag and first the second sealing ring of sealing ring are close
Laminating is cut, sealed ring deformation is prevented.
As shown in Figure 3 to Figure 4, check-valves includes valve body 31, fixed plate 32, valve element 33, valve rod 34 and spring 35, valve body 31
Lower surface be provided with liquid inlet 311 and lower valve body flange 310, the upper surface of valve body 31 is provided with liquid outlet and upper valve body
Flange, fixed plate 32 is arranged in valve body 31, and valve rod 34 is arranged in the through hole of fixed plate 32, valve element 33 and liquid inlet phase
Match somebody with somebody and it be arranged on the lower surface of valve rod 34, valve element 33 be provided with some return ports 330, spring 35 be sheathed on valve rod 34 and
Between fixed plate 32 and valve element 33.
Centrifugal pump rear check-valves out of service can prevent that the impulsive force of withdrawing fluid from invert the rotor of the pump housing, cause impeller
Nut loosening, makes water pump break down, and liquid can flow back after solving centrifugal pump closing in the prior art, cause impeller to turn over
Turn, the problem of nut loosening.
Embodiment：When staff is using the present invention, valve body is fixed on the pump housing, and it is defeated that pump housing operation carries out liquid
Send, so that liquid is transported to liquid inlet position, liquid produces thrust to valve element, moves up valve element, valve element moving belt
Ovable valve stem is moved, while making spring-compressed, so that valve element is separated with liquid inlet, liquid is entered in valve body by liquid inlet
Portion, and continuation is flowed under the centrifugal action of the pump housing；When the pump housing is closed, pump body centrifugal force is disappeared, and valve element is pushed away
Power is disappeared, and valve element is moved down under the elastic force effect that spring recovers deformation, so as to ressemble to inside liquid inlet, makes liquid
Body entrance is closed, and the water flow pressure of backflow acts on valve inner, the pump housing will not be caused to damage, the withdrawing fluid of valve inner
Pump body is slowly flowed back to by return port, the design has good protective effect to the pump housing.
In addition, being additionally provided with anti-blocking plug assembly, anti-blocking plug assembly includes connecting rod 36, guide post 37, scraper and guide-localization
Wear-resistant sleeve, the upper surface of connecting rod 36 is fixedly installed in fixed plate 32, and guide post 37 is arranged on the lower surface of connecting rod 36,
The bottom of guide post 37 is assemblied in return port 330, and scraper, guide-localization wear-resistant sleeve are from top to bottom set in turn in guide post
In annular side.Anti-blocking plug assembly is cleaned to return port, is solved because food liquid has concentration, viscosity and heavy slurry,
Backflow hole plug is easily influenceed into the problem of non-return centrifugal pump is normally run.
Embodiment：During the use of the present invention, guide post is under the positioning action of guide-localization wear-resistant sleeve
It is less prone to bending, and guide-localization wear-resistant sleeve is not interfered with the normal movement of valve element, valve element moving process, works as return port
When being moved to doctor position, scraper is cleared up the attachment on return port inwall, when scraper and guide-localization wear-resistant sleeve
Occur after abrasion, staff is directed to bar and removed from connecting rod, is then changed, and the clear of return port is easy in the design
Reason, can effectively prevent the hole plug that flows back.
As shown in figure 5, flow-metering mechanism includes flow measurement shell 41, flowmeter and dial plate 42, flow measurement shell
Lower surface be provided with down-off flange, down-off flange is connected with upper valve body flange, set on the upper surface of flow measurement shell
Have upper flow flange, flowmeter is arranged in flow measurement shell, dial plate 42 be arranged at the outside of flow measurement shell 41 and with
Flowmeter is connected.Flow-metering mechanism is easy to measure feed flow in centrifugal pump conveying liquid process, solves existing
Have can not be realized in technology the metering to centrifugal pump feed flow, it is impossible to which the working condition to centrifugal pump is monitored well
Problem.
In addition, being additionally provided with froth breaking component, froth breaking component is arranged at the lower section of flowmeter, and froth breaking component includes two bearing bracket
43rd, two bearings 44, rotating shaft 45, column 46 and blade 47, two bearing bracket 43 are relatively arranged in flow measurement shell 41, bearing 44
It is arranged in bearing block 43, rotating shaft 45 is arranged between two bearings 44 and its axle center is horizontally disposed, and column 46 and blade 47 are set
In on the periphery of rotating shaft 45, column 46 is provided with some fine needles.Froth breaking component improves the stability that centrifugal pump conveys liquid,
It is easy to accurate measurement of the flowmeter to flow, solves in the prior art because the property that centrifugal pump conveys liquid is easily produced largely
Foam, so as to influence the flowing velocity of liquid, and then the problem of influence flowmeter measurement result.
Embodiment：In the course of work of the present invention, liquid produces thrust in flow process to blade, so that
Move blade, blade movement drives axis of rotation, axis of rotation drives column to rotate, column, which is rotated, drives fine needle to rotate, when
When producing a large amount of foams in liquid, column and fine needle can be crushed the foam in liquid, bearing and bearing block
In the presence of the rotation and installation for being easy to bearing, this is designed to be crushed the foam produced in conveying liquid process, improved
The accuracy of flowmeter measurement result.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, all should be by no matter from the point of view of which point
Embodiment regards exemplary as, and be it is nonrestrictive, the scope of the present invention by appended claims rather than on state
It is bright to limit, it is intended that all changes fallen in the implication and scope of the equivalency of claim are included in the present invention
It is interior.Any reference in claim should not be considered as to the claim involved by limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It may be appreciated other embodiment.
Claims (6)
1. a kind of digital metering non-return centrifugal pump of high leakproofness, it is characterised in that including base, the pump housing, sealing mechanism, only
Valve and flow-metering mechanism are returned, the pump housing is arranged on base, axial one end of the pump housing, which is provided with pump housing flange, the side of the pump housing, to be set
There is liquid outlet, check-valves is arranged on liquid outlet, and flow-metering mechanism is connected with check-valves；Sealing mechanism is arranged at pump housing flange
Between the pump housing, sealing mechanism includes seal receptacle, the first sealing ring, the second sealing ring, pressure detection mechanism and governor motion, close
Envelope seat is arranged on the outer surface of the pump housing and sealed chamber is formed between the pump housing, and seal receptacle is connected with pump housing flange, and first is close
Seal, the second sealing ring set in sealed chamber and are provided with pressure chamber therebetween, and the first sealing ring is sealedly attached to pump housing method
Between the blue and pump housing, the second sealing ring is sealedly attached between seal receptacle and the pump housing, and pressure detection mechanism is connected with pump body,
Governor motion is connected with pressure chamber.
2. digital metering non-return centrifugal pump according to claim 1, it is characterised in that check-valves includes valve body, fixation
Plate, valve element, valve rod and spring, the lower surface of valve body are provided with liquid inlet and lower valve body flange, and the upper surface of valve body is provided with
Liquid outlet and upper valve body flange, fixed plate are arranged in valve body, and valve rod is arranged in the through hole of fixed plate, and valve element enters with liquid
Mouth matches and it is arranged on the lower surface of valve rod, and valve element is provided with some return ports, and spring housing is on valve rod and is located at
Between fixed plate and valve element.
3. digital metering non-return centrifugal pump according to claim 2, it is characterised in that be additionally provided with anti-blocking plug assembly, prevents
Plug assembly includes connecting rod, guide post, scraper and guide-localization wear-resistant sleeve, and the upper surface of connecting rod is fixedly installed on fixed plate
On, guide post is arranged on the lower surface of connecting rod, and the bottom of guide post is assemblied in return port, and scraper, guide-localization are wear-resisting
Set is from top to bottom set in turn in the annular side of guide post.
4. digital metering non-return centrifugal pump according to claim 1, it is characterised in that flow-metering mechanism includes flow
Shell, flowmeter and dial plate are measured, the lower surface of flow measurement shell is provided with down-off flange, down-off flange and upper valve body
Flange is connected, and the upper surface of flow measurement shell is provided with upper flow flange, and flowmeter is arranged in flow measurement shell, dial plate
It is arranged at the outside of flow measurement shell and is connected with flowmeter.
5. digital metering non-return centrifugal pump according to claim 4, it is characterised in that be additionally provided with froth breaking component, froth breaking
Component is arranged at the lower section of flowmeter, and froth breaking component includes two bearing bracket, two bearings, rotating shaft, column and blade, two bearing bracket phase
To being arranged in flow measurement shell, bearing is arranged in bearing block, and rotating shaft is arranged between two bearings and its axle center level is set
Put, column and blade are arranged on the periphery of rotating shaft.
6. digital metering non-return centrifugal pump according to claim 5, it is characterised in that column is provided with some fine needles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710306720.4A CN106939896B (en) | 2017-05-04 | 2017-05-04 | High-tightness digital metering non-return centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710306720.4A CN106939896B (en) | 2017-05-04 | 2017-05-04 | High-tightness digital metering non-return centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106939896A true CN106939896A (en) | 2017-07-11 |
| CN106939896B CN106939896B (en) | 2024-06-18 |
Family
ID=59464829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710306720.4A Active CN106939896B (en) | 2017-05-04 | 2017-05-04 | High-tightness digital metering non-return centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106939896B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829733A (en) * | 2020-08-20 | 2020-10-27 | 珠海市科进自动化设备有限公司 | A foam pump piston automatic backflow detection equipment |
| CN111927792A (en) * | 2020-09-04 | 2020-11-13 | 安徽莱恩电泵有限公司 | Pressure adjusting device of nuclear power plant-used primary loop emergency water-replenishing diesel engine pump set |
| CN118327991A (en) * | 2024-05-15 | 2024-07-12 | 深圳市钜泰泵业有限公司 | Centrifugal pump capable of preventing water from flowing backwards |
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| CN118327991A (en) * | 2024-05-15 | 2024-07-12 | 深圳市钜泰泵业有限公司 | Centrifugal pump capable of preventing water from flowing backwards |
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