CN108953158A - Multi-outlet centrifugal pump - Google Patents

Multi-outlet centrifugal pump Download PDF

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Publication number
CN108953158A
CN108953158A CN201811103206.1A CN201811103206A CN108953158A CN 108953158 A CN108953158 A CN 108953158A CN 201811103206 A CN201811103206 A CN 201811103206A CN 108953158 A CN108953158 A CN 108953158A
Authority
CN
China
Prior art keywords
resistance
pressure cylinder
sub
cavity
centrifugal pump
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.)
Granted
Application number
CN201811103206.1A
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Chinese (zh)
Other versions
CN108953158B (en
Inventor
姚松保
石绿瑞
蔡荣辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Nan Yuanbeng Industry Co Ltd
Original Assignee
Zhejiang Nan Yuanbeng Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to CN201811103206.1A priority Critical patent/CN108953158B/en
Priority claimed from CN201811103206.1A external-priority patent/CN108953158B/en
Publication of CN108953158A publication Critical patent/CN108953158A/en
Application granted granted Critical
Publication of CN108953158B publication Critical patent/CN108953158B/en
Active legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06Multi-stage pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4293Details of fluid inlet or outlet

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 multi-outlet centrifugal pumps, including the pump housing, the pump housing includes resistance to pressure cylinder, the inner space of the resistance to pressure cylinder is successively separated into bottom cavity and at least one sub- chamber from top to bottom, cavity separation structure is equipped between each sub- chamber and cavity below the sub- chamber, the side wall of the resistance to pressure cylinder, which is equipped with, corresponds the sub-export being connected to each sub- chamber;Deflector is provided in the resistance to pressure cylinder, the bottom end of resistance to pressure cylinder is connected with disengaging water body and pedestal, and the top of resistance to pressure cylinder is equipped with motor, and the motor is connect with deflector by shaft coupling to transmit torque.The high-floor feedwater that the composite can be widely applied to classification pressurization, is suitable for the occasion of multiple flow lift demands, and difficulty of processing is low, appearance looks elegant.

Description

Multi-outlet centrifugal pump
Technical field
The present invention relates to conveying equipment for fluid substances technical field more particularly to a kind of multi-outlet centrifugal pumps.
Background technique
Existing centrifugal multistage pump multiple centrifugal pump is mostly the pump of single inlet single-outlet, and inlet and outlet are in the same horizontal line and one As on the same part, motor is connected with pump shaft by shaft coupling, have multiple impellers on pump shaft, impeller number (series) it is more Its lift is determined less how much, user can select the series of pump, disadvantage according to the actual situation are as follows: pump only has single outlet, If under the occasion for needing multiple lift demands, it is necessary to use more pumps, costly, inefficiency.
The applying date is the Chinese patent of on 07 25th, 2014, Patent No. CN201420415491.1, discloses one kind High-pressure outlet and low tension outlet stablize the multistage pump of water outlet, including the vertical pump housing, and the upper end of the pump housing is equipped with motor, the lower end of the pump housing Equipped with end cap, the center of the pump housing is equipped with a shaft, and the upper end of shaft is connected to motor, and the inside of the pump housing is divided into upper chamber under Chamber, the inside of each chamber are equipped with impeller, and the water inlet of the pump housing is located in lower chambers, and the high-pressure outlet of the pump housing is located at epicoele On room, the low tension outlet of the pump housing is located in lower chambers;The diameter of the impeller of bottom chamber be upper chamber's internal lobe wheel diameter 1.2~ 1.3 again.Although the patent can achieve the purpose of single pump multi output, but only there are two outlets, therefore use scope is not wide, separately Its outer pump housing is sectional type, and processing difficulties are at high cost.
Summary of the invention
The present invention proposes a kind of multi-outlet centrifugal pump to solve the above technical problems.
In order to achieve the above object, the technical scheme adopted by the invention is as follows: a kind of multi-outlet centrifugal pump, including the pump housing, The pump housing includes resistance to pressure cylinder, and the inner space of the resistance to pressure cylinder is successively separated into bottom cavity and at least one sub- chamber from top to bottom, It is equipped with cavity separation structure between each sub- chamber and cavity below the sub- chamber, the side wall of the resistance to pressure cylinder is equipped with The sub-export being connected to is corresponded with sub- chamber;Deflector is provided in the resistance to pressure cylinder, the bottom end of resistance to pressure cylinder is connected with pedestal And it is connected to the disengaging water body of bottom cavity, seal receptacle is sealedly connected at the top of resistance to pressure cylinder, the top of the seal receptacle is equipped with motor, institute Motor is stated to be connect with deflector by shaft coupling to transmit torque.
If preferably, the deflector include pump shaft and several impellers on pump shaft, several support guide vanes, Dry guide vane, the guide vane are located above support guide vane, and the guide vane matches with impeller, and the pump shaft and motor pass through shaft coupling Connection is to transmit torque.
Preferably, being sealedly connected with seal receptacle at the top of the resistance to pressure cylinder, the pump shaft passes through the centre bore of seal receptacle, The gap location of the pump shaft and seal receptacle is equipped with mechanical seal;It is equipped with pull rod between the seal receptacle and disengaging water body, it is described Pull rod is placed in outside resistance to pressure cylinder.
Preferably, several impellers, several support guide vanes, several guide vanes are evenly distributed in bottom cavity and sub- chamber.
Preferably, the quantity of the sub- chamber and sub-export is 2 to 6.
Preferably, multiple sub-exports are located at the same side of resistance to pressure cylinder when the sub-export is more than one.
Preferably, being equipped with O shape slot at the outer circle of the cavity separation structure, O-ring, the O are equipped in the O shape slot Shape circle will seal between cavity separation structure and resistance to pressure cylinder.
Preferably, being connected with choma seat at the top of the cavity separation structure, the choma seat is connected with floating choma, Choma gland is removably connected on the outside of the choma seat.
Preferably, several guide piles are arranged at the bottom of the cavity separation structure, the circumferencial direction of the guide pile is set There is return flow line.
Preferably, the gap location of the pump shaft and seal receptacle is equipped with mechanical seal.
Preferably, being additionally provided with several impeller spacers on the pump shaft, the impeller spacer is set to two leaves of arbitrary neighborhood Between wheel.
Preferably, being provided with protection seal receptacle and shaft coupling on the outside of the seal receptacle and shaft coupling and supporting motor Bracket.
Preferably, the sub-export and the connection type of resistance to pressure cylinder are cutting ferrule, flange or threaded connection.
Compared with prior art, the high-floor feedwater that the composite can be widely applied to classification pressurization, is suitable for multiple flows The occasion of lift demand, and difficulty of processing is low, appearance looks elegant.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of multi-outlet centrifugal pump of the present invention;
Fig. 2 is the enlarged structure schematic diagram in Fig. 1 at A;
Fig. 3 is the structural schematic diagram of cavity separation structure in multi-outlet centrifugal pump of the present invention;
Fig. 4 is the cross-sectional view of K-K in Fig. 3.
In figure, 1- motor, the resistance to pressure cylinder of 2-, 3- disengaging water body, 4- shaft coupling, 5- mechanical seal, 6- pump shaft, 7- seal receptacle, 8- pull rod, 9- bracket, 10- bottom cavity, 11- chamber, 12- sub-export, 13- impeller, 14- support guide vane, 15- guide vane, 16- cavity point Every structure, 17-O shape circle, 18- choma seat, 19- floating retaining ring, 20- choma lid, 21- guide pile, the return flow line 22-, the bottom 23- Seat.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally Transformation is included within the scope of protection of the present invention.
It is only to be not intended to limit the invention merely for for the purpose of describing particular embodiments in terminology used in the present invention. It is also intended in the present invention and the "an" of singular used in the attached claims, " described " and "the" including majority Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps It may be combined containing one or more associated any or all of project listed.
As shown in Figure 1, a kind of multi-outlet centrifugal pump, including the pump housing, pump housing top are equipped with motor 1, the pump housing includes resistance to pressure cylinder 2 With the deflector being set in resistance to pressure cylinder 2, the bottom end of resistance to pressure cylinder 2 is connected with disengaging water body 3 and pedestal 23, deflector and motor 1 is connected by shaft coupling 4 to transmit torque.The pump housing can be vertical, or the other structures such as horizontal.
At least one cavity separation structure 16 is provided in resistance to pressure cylinder 2, cavity separation structure 16 is empty by the inside of resistance to pressure cylinder 2 Between be successively separated into bottom cavity 10 and at least one sub- chamber 11 from top to bottom, the connection disengaging water body 3 of bottom cavity 10, resistance to pressure cylinder 2 is equipped with The sub-export 12 being connected to is corresponded with sub- chamber 11.Wherein, resistance to pressure cylinder 2 can be made of stainless steel, sub-export 12 and resistance to pressure cylinder 2 Connection type can be cutting ferrule, flange or threaded connection.
As shown in Fig. 2, deflector may include that pump shaft 6 and several impellers 13 on pump shaft 6, several supports are led Leaf 14, several guide vanes 15.Wherein, support guide vane 14 can be located at 16 top of cavity separation structure, and guide vane 15 is located at support guide vane 14 tops, guide vane 15 match with impeller 13, and pump shaft 6 is connect with motor 1 by shaft coupling 4 to transmit torque.In addition, pump shaft 6 On can also set several impeller spacers, impeller spacer is set between two impellers 13 of arbitrary neighborhood.
At this point, the top of resistance to pressure cylinder 2 can be sealedly connected with seal receptacle 7, pump shaft 6 passes through the centre bore of seal receptacle 7, sealing It is equipped with pull rod 8 between seat and 7 disengaging water bodys 3, pull rod 8 is placed in outside resistance to pressure cylinder 2.The gap location of pump shaft 6 and seal receptacle 7 is equipped with machine Tool sealing 5.Bracket 9 can be set on the outside of seal receptacle 7 and shaft coupling 4 to protect seal receptacle 7 and shaft coupling 4 and support motor 1.
It is equipped with O shape slot at the outer circle of cavity separation structure 16, O-ring 17 is equipped in O shape slot, O-ring 17 is used for cavity It is sealed between 2 inner wall of separation structure 16 and resistance to pressure cylinder.As shown in figure 3, several guide piles are arranged at the bottom of cavity separation structure 16 21, play the role of installation positioning.As shown in figure 4, the top (Fig. 4 is reversed) of cavity separation structure 16 is connected with choma seat 18, choma seat 18 is connected with floating choma 19, and the outside of choma seat 18 is removably connected with choma gland 20, and floating choma 19 is used In reducing the leakage between cavity separation structure 16 and impeller 13, the efficiency of pump is improved.The circumferencial direction of guide pile 21 is equipped with back Circulation road 22, a part of liquid are pooled to apopore by return flow line 22 and flow out, and another part liquid is by choma seat 18 Through-hole enter at the first stage impeller 13 of next cavity, to be further pressurized.
Cavity separation structure 16 of the invention will be separated into the pressure chamber of different pressures inside resistance to pressure cylinder 2, bottom cavity 10 and each The pressure of a sub- chamber 11 is different, can adjust the lift of cavity by the quantity of the impeller 13 and guide vane 15 that adjust each cavity. It is of course also possible to which several impellers 13, several support guide vanes 14, several guide vanes 15 are evenly distributed in bottom cavity 10 and each sub- chamber 11.
The quantity of sub- chamber 11 and sub-export 12 can be set according to actual needs, for example can choose 2 to 6.When separating When mouth 12 is more than one, multiple sub-exports 12 can be located at the same side of resistance to pressure cylinder 2.
In this way, several sub-exports 12 are arranged on resistance to pressure cylinder 2, to have 2 or more water outlets, each in the present invention The lift of water outlet is each different, can satisfy 2 or more lift demands, and use scope is wider, can meet high pressure, in The different demand such as pressure, low pressure has saved equipment and pipe-line system, and the efficiency of pump is also than high-efficient, the Er Qiejia of former more pumps Work difficulty is low, appearance looks elegant, and outlet port can be customized by customer requirement, very flexibly.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by the application Claim point out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.

Claims (9)

1. a kind of multi-outlet centrifugal pump, which is characterized in that including the pump housing, the pump housing includes resistance to pressure cylinder, the resistance to pressure cylinder it is interior Portion space is successively separated into bottom cavity and at least one sub- chamber, each sub- chamber and the cavity being located at below the sub- chamber from top to bottom Between be equipped with cavity separation structure, the side wall of the resistance to pressure cylinder is equipped with and corresponds separating of being connected to each sub- chamber Mouthful;
Deflector is provided in the resistance to pressure cylinder, the bottom end of resistance to pressure cylinder is connected with pedestal and is connected to the disengaging water body of bottom cavity, resistance to Seal receptacle is sealedly connected at the top of pressure cylinder, the top of the seal receptacle is equipped with motor, and the motor passes through shaft coupling and water conservancy diversion Mechanism is connected to transmit torque.
2. multi-outlet centrifugal pump according to claim 1, which is characterized in that the deflector includes pump shaft and is set to Several impellers, several support guide vanes, several guide vanes on pump shaft, the guide vane are located above support guide vane, the guide vane and leaf Wheel matches, and the pump shaft is connect with motor by shaft coupling to transmit torque.
3. multi-outlet centrifugal pump according to claim 2, which is characterized in that the pump shaft passes through the centre bore of seal receptacle, Pull rod is connected between the seal receptacle and pedestal, the pull rod is placed in outside resistance to pressure cylinder.
4. multi-outlet centrifugal pump according to claim 1, which is characterized in that be equipped at the outer circle of the cavity separation structure O shape slot, the O shape slot is interior to be equipped with O-ring, and the O-ring will seal between cavity separation structure and resistance to pressure cylinder.
5. multi-outlet centrifugal pump according to claim 1 or 4, which is characterized in that connect at the top of the cavity separation structure It is connected to choma seat, the choma seat is connected with floating choma, is removably connected with choma gland on the outside of the choma seat.
6. multi-outlet centrifugal pump according to claim 1 or 4, which is characterized in that the bottom of the cavity separation structure has The circumferencial direction of several guide piles, the guide pile is equipped with return flow line.
7. multi-outlet centrifugal pump according to claim 1, which is characterized in that the connection type of the sub-export and resistance to pressure cylinder For cutting ferrule, flange or threaded connection.
8. multi-outlet centrifugal pump according to claim 3, which is characterized in that the gap location of the pump shaft and seal receptacle is equipped with Mechanical seal.
9. multi-outlet centrifugal pump according to claim 1, which is characterized in that the setting of the outside of the seal receptacle and shaft coupling There are protection seal receptacle and shaft coupling and the bracket for supporting motor.
CN201811103206.1A 2018-09-20 Multi-outlet centrifugal pump Active CN108953158B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811103206.1A CN108953158B (en) 2018-09-20 Multi-outlet centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811103206.1A CN108953158B (en) 2018-09-20 Multi-outlet centrifugal pump

Publications (2)

Publication Number Publication Date
CN108953158A true CN108953158A (en) 2018-12-07
CN108953158B CN108953158B (en) 2024-07-12

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110359518A (en) * 2019-05-16 2019-10-22 戚长胜 A kind of variable-flow multi-stage-multi-outlet water pump constant pressure water supply system and control method
CN112901511A (en) * 2021-01-29 2021-06-04 绍兴市雪花机电有限公司 Variable frequency pump
CN114278570A (en) * 2022-02-07 2022-04-05 诺赛水泵系统(江苏)有限公司 Vertical centrifugal pump and water supply system with same
CN114962272A (en) * 2022-06-09 2022-08-30 烟台龙港泵业股份有限公司 High-pressure water injection pump with adjustable marine floating platform reposition of redundant personnel
CN117823415A (en) * 2024-03-04 2024-04-05 山东华立供水设备有限公司 Multistage centrifugal pump

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FR2277256A1 (en) * 1974-07-03 1976-01-30 Sulzer Ag MULTI-STAGE CENTRIFUGAL PUMP
CN202157969U (en) * 2011-07-11 2012-03-07 山东博泵科技股份有限公司 Multi-stage multi-outlet suspension arm type centrifugal pump
EP2505842A1 (en) * 2011-03-29 2012-10-03 Grundfos Management a/s Multi stage centrifugal pump system
WO2014187648A1 (en) * 2013-05-22 2014-11-27 Grundfos Holding A/S Multistage self-suctioning centrifugal pump unit
CN204041467U (en) * 2014-09-30 2014-12-24 大福泵业有限公司 Efficient deep well submerged pump
CN204041476U (en) * 2014-07-25 2014-12-24 上海瑞邦机械集团有限公司 A kind of high-pressure outlet and low tension outlet stablize the multistage pump of water outlet
CN104314827A (en) * 2014-08-25 2015-01-28 南方泵业股份有限公司 Middle discharging section of multi-outlet horizontal single-suction sectional multistage centrifugal pump
CN104612976A (en) * 2015-01-27 2015-05-13 中国海洋石油总公司 Horizontal type and single suction segment type multi-stage and double-outlet centrifugal pump
CN204476777U (en) * 2012-05-25 2015-07-15 安德烈·尤利维奇·亚济科夫 Multi-impeller Centrifugal electro-pump
CN204692112U (en) * 2015-05-22 2015-10-07 戚长胜 Punching press vertical multi-stage multiple exit ports water pump
WO2016083382A1 (en) * 2014-11-25 2016-06-02 Ksb Aktiengesellschaft Centrifugal pump comprising a conducting device
CN205533264U (en) * 2016-01-28 2016-08-31 绵阳博凡科技有限公司 Vertical multi -stage centrifugal pump
CN107461339A (en) * 2016-06-03 2017-12-12 苏州赟羽机电科技有限公司 A kind of intelligent centrifugal multistage pump multiple centrifugal pump
CN207513842U (en) * 2017-11-28 2018-06-19 浙江克瑞丰球泵业有限公司 A kind of vertical multi-stage centrifugal pump of the floating type impeller port ring device of band
CN108457865A (en) * 2018-03-21 2018-08-28 浙江南元泵业有限公司 High-temperature resistant pump and its cooling structure
CN208816343U (en) * 2018-09-20 2019-05-03 浙江南元泵业有限公司 Multi-outlet centrifugal pump

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2277256A1 (en) * 1974-07-03 1976-01-30 Sulzer Ag MULTI-STAGE CENTRIFUGAL PUMP
EP2505842A1 (en) * 2011-03-29 2012-10-03 Grundfos Management a/s Multi stage centrifugal pump system
CN202157969U (en) * 2011-07-11 2012-03-07 山东博泵科技股份有限公司 Multi-stage multi-outlet suspension arm type centrifugal pump
CN204476777U (en) * 2012-05-25 2015-07-15 安德烈·尤利维奇·亚济科夫 Multi-impeller Centrifugal electro-pump
WO2014187648A1 (en) * 2013-05-22 2014-11-27 Grundfos Holding A/S Multistage self-suctioning centrifugal pump unit
CN204041476U (en) * 2014-07-25 2014-12-24 上海瑞邦机械集团有限公司 A kind of high-pressure outlet and low tension outlet stablize the multistage pump of water outlet
CN104314827A (en) * 2014-08-25 2015-01-28 南方泵业股份有限公司 Middle discharging section of multi-outlet horizontal single-suction sectional multistage centrifugal pump
CN204041467U (en) * 2014-09-30 2014-12-24 大福泵业有限公司 Efficient deep well submerged pump
WO2016083382A1 (en) * 2014-11-25 2016-06-02 Ksb Aktiengesellschaft Centrifugal pump comprising a conducting device
CN104612976A (en) * 2015-01-27 2015-05-13 中国海洋石油总公司 Horizontal type and single suction segment type multi-stage and double-outlet centrifugal pump
CN204692112U (en) * 2015-05-22 2015-10-07 戚长胜 Punching press vertical multi-stage multiple exit ports water pump
CN205533264U (en) * 2016-01-28 2016-08-31 绵阳博凡科技有限公司 Vertical multi -stage centrifugal pump
CN107461339A (en) * 2016-06-03 2017-12-12 苏州赟羽机电科技有限公司 A kind of intelligent centrifugal multistage pump multiple centrifugal pump
CN207513842U (en) * 2017-11-28 2018-06-19 浙江克瑞丰球泵业有限公司 A kind of vertical multi-stage centrifugal pump of the floating type impeller port ring device of band
CN108457865A (en) * 2018-03-21 2018-08-28 浙江南元泵业有限公司 High-temperature resistant pump and its cooling structure
CN208816343U (en) * 2018-09-20 2019-05-03 浙江南元泵业有限公司 Multi-outlet centrifugal pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110359518A (en) * 2019-05-16 2019-10-22 戚长胜 A kind of variable-flow multi-stage-multi-outlet water pump constant pressure water supply system and control method
CN112901511A (en) * 2021-01-29 2021-06-04 绍兴市雪花机电有限公司 Variable frequency pump
CN112901511B (en) * 2021-01-29 2022-08-09 绍兴市雪花机电有限公司 Variable frequency pump
CN114278570A (en) * 2022-02-07 2022-04-05 诺赛水泵系统(江苏)有限公司 Vertical centrifugal pump and water supply system with same
CN114962272A (en) * 2022-06-09 2022-08-30 烟台龙港泵业股份有限公司 High-pressure water injection pump with adjustable marine floating platform reposition of redundant personnel
CN117823415A (en) * 2024-03-04 2024-04-05 山东华立供水设备有限公司 Multistage centrifugal pump
CN117823415B (en) * 2024-03-04 2024-05-03 山东华立供水设备有限公司 Multistage centrifugal pump

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