CN109026757A - A kind of adjustment of blade angle device - Google Patents

A kind of adjustment of blade angle device Download PDF

Info

Publication number
CN109026757A
CN109026757A CN201811322790.XA CN201811322790A CN109026757A CN 109026757 A CN109026757 A CN 109026757A CN 201811322790 A CN201811322790 A CN 201811322790A CN 109026757 A CN109026757 A CN 109026757A
Authority
CN
China
Prior art keywords
blade
sliding block
push rod
index dial
adjustment
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
CN201811322790.XA
Other languages
Chinese (zh)
Other versions
CN109026757B (en
Inventor
李星
荚小健
舒雪辉
张帅
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.)
Hefei Hengda Jianghai Pump Co Ltd
Original Assignee
Hefei Hengda Jianghai Pump 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
Application filed by Hefei Hengda Jianghai Pump Co Ltd filed Critical Hefei Hengda Jianghai Pump Co Ltd
Priority to CN201811322790.XA priority Critical patent/CN109026757B/en
Publication of CN109026757A publication Critical patent/CN109026757A/en
Application granted granted Critical
Publication of CN109026757B publication Critical patent/CN109026757B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/24Vanes
    • F04D29/242Geometry, shape
    • 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
    • F04D13/08Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0055Rotors with adjustable blades
    • 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
    • F04D29/007Details, component parts, or accessories especially adapted for liquid pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention belongs to electric pump blade industry and disclose a kind of adjustment of blade angle device;Including diffuser, blade, impeller boss, motor shaft and locking device, the push rod is equipped with keyway, is arranged with push rod index dial in central location by keyway, is arranged with push plate in the other end of push rod;The stepper motor is connect with scale is dialled, and the push rod index dial is engaged with scale is dialled;Guide rail geosynclinal block and blade index dial are also connected on the impeller boss;The blade turning mechanism component includes the first sliding block, the first crank, blade voussoir, the second sliding block and the second crank, first sliding block is connected with the first crank, the second sliding block and the second crank, and the other end of first sliding block and the second sliding block is connect with guide rail geosynclinal block;The blade voussoir is engaged with blade index dial;Apparatus of the present invention solve the problems, such as that adjustment of blade angle is inconvenient in the prior art, have the advantages that quickly, conveniently, angular adjustment it is reliably accurate.

Description

A kind of adjustment of blade angle device
Technical field
The present invention relates to electric pump blade technology field more particularly to a kind of adjustment of blade angle devices.
Background technique
Submersible pump generally refers to pump housing impeller and the motor of impeller is driven all to pull the plug a kind of water pump of work, mainly It is used including deep-well and work surface is with two kinds.Deep Submersible Pump is powered by protruding into the cable in well to motor, and biography is eliminated Dynamic long axis, thus compact-sized, light-weight, installation, use and convenient transfer, are there is the substituted borehole shaft driven (centrifugal) pump in power supply area Trend, but it is not applicable to the big well of silt content and non-transformer area.
Submersible pump is widely used in the fields such as industrial and agricultural production, mine, urban construction;Submersible pump mainly by stator, The components such as rotor, upper end cover, lower cover, terminal box composition;Submersible pump is after the installation is completed, it usually needs test measurement flow and Lift, according to the setting angle of flow and lift adjustment blade, under actual condition, blade disassembly is more complicated, space limitation Inconvenient manual operations adjustment.In consideration of it, how to provide a kind of adjustment of blade angle device being conveniently adjusted is art technology Personnel need the technical problem solved.
Summary of the invention
For above-mentioned shortcoming in the prior art, the present invention provides a kind of adjustment of blade angle devices.
The present invention using following technical scheme in order to solve the above technical problems, realized:
Design a kind of adjustment of blade angle device, including diffuser, blade, impeller boss, motor shaft and locking device, institute The diffuser stated is fixed on motor case, and the impeller boss is set in the end of motor shaft, passes through locking device for leaf Wheel hub is fixed on motor shaft, and the diffuser is equipped with stepper motor and hydraulic cylinder, the piston rod end of the hydraulic cylinder It is connected with one end of push rod by connecting flange;The push rod is equipped with keyway, is arranged by keyway in central location There is push rod index dial, is arranged with push plate in the other end of push rod;The stepper motor is connect with scale is dialled, and is used to stir Scale, the push rod index dial are engaged with scale is dialled, and keyed is dialled scale and rotated together;It is also connected on the impeller boss Guide rail geosynclinal block and blade index dial, the guide rail geosynclinal block are arranged on the position between blade index dial and diffuser, and The blade index dial is connected by blade turning mechanism component with guide rail geosynclinal block;The blade turning mechanism component packet Include the first sliding block, the first crank, blade voussoir, the second sliding block and the second crank, first sliding block and the first crank, Two sliding blocks and the second crank are connected by connecting pin, and the other end of first sliding block and the second sliding block is and guide rail Geosynclinal block is connected;The blade voussoir engages connection with blade index dial.
Preferably, the push rod index dial and push plate pass through push rod locking nut and are connected with push rod.
Preferably, gap is equipped between the piston rod end and push rod of the hydraulic cylinder.
Preferably, the blade index dial is fixed on impeller boss by blade locking nut.
Preferably, first sliding block and the second slide block structure are identical.
Preferably, first crank and the second crank structure are identical.
Preferably, first sliding block and the second sliding block are connected with guide rail geosynclinal block by connecting pin.
Preferably, the locking device is anti-silk cap, is connected through a screw thread with motor shaft
A kind of adjustment of blade angle device proposed by the present invention, beneficial effect are:
(1) angle and upper and lower position of the apparatus of the present invention by control push plate, completes locking and release and the angle of blade The adjustment of degree acts, and is able to achieve the function of adjust automatically blade angle;The difficulty for effectively reducing adjusting, solves the prior art The not convenient problem of middle adjustment of blade angle;Have the advantages that adjusting is quick, easy to adjust, angular adjustment is reliable accurate;
(2) apparatus of the present invention greatly reduce the difficulty for adjusting blade angle in the prior art, improve the flexible of adjusting Property, improve the efficiency of adjusting;
(3) apparatus of the present invention structure is simple, use value is high, can be widely applied to electric pump field, has a wide range of applications Prospect and practical value.
Detailed description of the invention
The present invention is described in further detail for embodiment in reference to the accompanying drawing, but does not constitute to of the invention Any restrictions.
Fig. 1 is the schematic view of the front view of apparatus of the present invention;
Fig. 2 is the attachment structure schematic diagram of hydraulic cylinder, connecting flange and push rod in apparatus of the present invention;
Fig. 3 is the structural schematic diagram of blade index dial in apparatus of the present invention;
Fig. 4 is the connection knot of blade turning mechanism component, blade locking nut and blade index dial in apparatus of the present invention Structure schematic diagram;
Fig. 5 is the structural schematic diagram of blade voussoir in apparatus of the present invention.
In figure: diffuser 1, impeller boss 3, motor shaft 4, locking device 5, stepper motor 6, dials scale 7, hydraulic cylinder at blade 2 8, connecting flange 9, push rod 10, push rod index dial 12, guide rail geosynclinal block 13, push plate 14, blade turning mechanism component 15, the first sliding block 15.1, the first crank 15.2, blade voussoir 15.3, the second sliding block 15.4, the second crank 15.5, blade locking nut 16, blade Index dial 17.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, belongs to protection scope of the present invention.
Refering to shown in attached drawing 1 to attached drawing 5, a kind of adjustment of blade angle device of the invention, including diffuser 1, blade 2, Impeller boss 3, motor shaft 4 and locking device 5, the diffuser 1 are fixed on motor case, and the impeller boss 3 is arranged In the end of motor shaft 4, by locking device 5 that impeller boss 3 is fixed on the motor shaft (4), the locking device 5 is anti-silk Cap is connected through a screw thread with motor shaft 4;The diffuser 1 is equipped with stepper motor 6 and hydraulic cylinder 8, the hydraulic cylinder 8 Piston rod end and one end of push rod 10 be connected by connecting flange 9;The push rod 10 is equipped with keyway, passes through key Slot is arranged with push rod index dial 12 in central location, is arranged with push plate 14 in the other end of push rod 10;The stepper motor 6 with It dials scale 7 to connect, is used to stir scale 7, the push rod index dial 12 is engaged with scale 7 is dialled, and keyed dials scale 7 one Play rotation;Guide rail geosynclinal block 13 and blade index dial 17 are also connected on the impeller boss 3, the guide rail geosynclinal block 13 is arranged On position between blade index dial 17 and diffuser 1, and the blade index dial 17 passes through blade turning mechanism component 15 are connected with guide rail geosynclinal block 13;The blade turning mechanism component 15 includes the first sliding block 15.1, the first crank 15.2, leaf Piece voussoir 15.3, the second sliding block 15.4 and the second crank 15.5, first sliding block 15.1 and the first crank 15.2, second Sliding block 15.4 and the second crank 15.5 are connected by connecting pin, first sliding block 15.1 and the second sliding block 15.4 The other end is connected with guide rail geosynclinal block 13;The blade voussoir 15.3 engages connection with blade index dial 17, and described pushes away Bar index dial 12 and push plate 14 are connected by push rod locking nut 11 with push rod 10, the tailpiece of the piston rod of the hydraulic cylinder 8 Gap is equipped between portion and push rod 10, the blade index dial 17 is fixed on impeller boss 3 by blade locking nut 16, institute The first sliding block 15.1 stated is identical with 15.4 structure of the second sliding block, 15.5 structure phase of first crank 15.2 and the second crank Together, first sliding block 15.1 and the second sliding block 15.4 are connected with guide rail geosynclinal block 13 by connecting pin.
Working principle: refering to shown in attached drawing 1, the pedestal of the pedestal of hydraulic cylinder 8 and stepper motor 6 is all fixed on diffuser 1 surface, remains static always.The piston rod of hydraulic cylinder 8 and push rod 10 are connect by connecting flange 9, end face there are gap, Refering to shown in attached drawing 2.Push rod 10 has screw thread and keyway, by key and push rod locking nut 11, by push rod index dial 12 and pushes away Plate 14 is fixed on push rod 10;The dragging of stepper motor 6 dials scale 7 and rotates by a certain angle, and push rod index dial 12 passes through tooth with scale 7 is dialled It engages and follows and rotate by a certain angle, and then control the position of push rod 10 and the rotation angle of push plate 14.Guide rail geosynclinal block 13 is fixed on Impeller boss 3, blade turning mechanism component 15 are installed on guide rail geosynclinal block 13, blade locking nut 16, blade index dial 17.Refering to attached Shown in Fig. 3, blade index dial 17 is equipped with keyway, and there is keyway in the axis front end of blade 2, is connect by key with blade index dial 17, leaf The shaft end of piece 2 is threaded, cooperates with blade locking nut 16, locking-blade 2.Such as 4 institute of attached drawing of blade turning mechanism component 15 Show, is made of the first sliding block 15.1, the first crank 15.2, blade voussoir 15.3, the second sliding block 15.4 and the second crank 15.5;Leaf Piece voussoir 15.3 is equipped with the special tooth profile that is meshed with blade index dial 17, refering to shown in attached drawing 5, blade voussoir 15.3 up and down Movement, completion are engaged and are detached from blade index dial 17, realize the circumferentially positioned of blade index dial 17.
When water pump runs well, blade locking nut 16 is in locking state, blade voussoir 15.3 and blade index dial 17 Engagement is locked.When needing to adjust blade angle, water pump shuts down, and blade locking nut 16, blade voussoir are unclamped in rotation 15.3 move upwards, and are detached from blade index dial 17, then adjust the angle of blade index dial 17.Then blade voussoir 15.3 is downward Movement, is engaged with blade index dial 17, finally rotates the locked tight nut 16 of blade lock;Blade locking nut 16, blade voussoir 15.3, the action control of blade index dial 17 is by the first sliding block 15.1 of control, blade voussoir 15.3 and the second sliding block 15.4 In the guide groove position of guide rail geosynclinal block 13.
First sliding block 15.1 moves downward, and is moved downward by push plate 14, and flange portion acts on its first cunning 15.1 upper surface of block, oppresses it and moves downward along guide groove;If the first sliding block 15.1 of control moves upwards, push plate 14 is moved upwards To highest point position, reset position is then rotated to, moves to lowest point still further below, then rotates to the first sliding block 15.1 Position, last push plate 14 move upwards, 15.1 following table face contact of flange portion and the first sliding block so that the first sliding block 15.1 to Upper movement.Similarly, highest point or minimum point are returned to by push plate 14, and rotation adjusts 14 flange of push plate and make to reset position For the surface of blade voussoir 15.3 and the second sliding block 15.4, its reciprocating motion is realized.
If the first sliding block 15.1 moves upwards, crank 15.2 is stretched;If the first sliding block 15.1 moves downward, squeeze bent Handle 15.2, and then 17 bidirectional rotation of blade index dial is controlled, adjust the angle of blade.Similarly, the fortune up and down of the second sliding block 15.4 It is dynamic, 16 rotation position of blade locking nut is controlled, realizes locking and the release function of blade;Blade voussoir 15.3 slides up and down, End is engaged and is detached from blade index dial 17, and the locked function of pin is played.It is found that dialling scale by the dragging of stepper motor 6 7, it drives push rod 12 to index disc spins, changes the elongation and receipts of the flange angle position of push plate 14 and the piston rod of hydraulic cylinder 8 Contracting can complete the rotation locking of blade locking nut 16 and unclamp angle control, the blade voussoir of control, blade index dial 17 15.3 engagement and disengaging controls, and realizes the angular adjustment and locking function of blade.After adjusting, push plate 14 should be adjusted most At high point, guarantee blade rotation without any obstruction.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art, It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims Subject to enclosing.

Claims (8)

1. a kind of adjustment of blade angle device, including diffuser (1), blade (2), impeller boss (3), motor shaft (4) and locking Device (5), the diffuser (1) are fixed on motor case, and the impeller boss (3) is set in the end of motor shaft (4), Impeller boss (3) is fixed on motor shaft (4) by it by locking device (5), which is characterized in that is set on the diffuser (1) There are stepper motor (6) and hydraulic cylinder (8), the piston rod end of the hydraulic cylinder (8) and the one end of push rod (10) pass through connection method Blue (9) are connected;The push rod (10) is equipped with keyway, is arranged with push rod index dial in central location by keyway (12), push plate (14) are arranged in the other end of push rod (10);The stepper motor (6) is connect with scale (7) are dialled, and is used for It stirs scale (7), the push rod index dial (12) is engaged with scale (7) are dialled, and keyed is dialled scale (7) and rotated together;Institute Guide rail geosynclinal block (13) and blade index dial (17), guide rail geosynclinal block (13) setting are also connected on the impeller boss (3) stated On position between blade index dial (17) and diffuser (1), and the blade index dial (17) adjusts machine by blade Structure component (15) is connected with guide rail geosynclinal block (13);The blade turning mechanism component (15) include the first sliding block (15.1), First crank (15.2), blade voussoir (15.3), the second sliding block (15.4) and the second crank (15.5), first sliding block (15.1) it is connected with the first crank (15.2), the second sliding block (15.4) and the second crank (15.5) by connecting pin, institute The other end for stating the first sliding block (15.1) and the second sliding block (15.4) is connected with guide rail geosynclinal block (13);The blade wedge Block (15.3) engages connection with blade index dial (17).
2. a kind of adjustment of blade angle device according to claim 1, which is characterized in that the push rod index dial (12) And push plate (14) is connected by push rod locking nut (11) with push rod (10).
3. a kind of adjustment of blade angle device according to claim 1, which is characterized in that the piston of the hydraulic cylinder (8) Gap is equipped between boom end and push rod (10).
4. a kind of adjustment of blade angle device according to claim 1, which is characterized in that the blade index dial (17) It is fixed on impeller boss (3) by blade locking nut (16).
5. a kind of adjustment of blade angle device according to claim 1, which is characterized in that first sliding block (15.1) It is identical with the second sliding block (15.4) structure.
6. a kind of adjustment of blade angle device according to claim 1, which is characterized in that first crank (15.2) It is identical with the second crank (15.5) structure.
7. a kind of adjustment of blade angle device according to claim 1, which is characterized in that first sliding block (15.1) And second sliding block (15.4) be connected with guide rail geosynclinal block (13) by connecting pin.
8. a kind of adjustment of blade angle device according to claim 1, which is characterized in that the locking device (5) is Anti- silk cap is connected through a screw thread with motor shaft (4).
CN201811322790.XA 2018-11-08 2018-11-08 Blade angle adjusting device Active CN109026757B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811322790.XA CN109026757B (en) 2018-11-08 2018-11-08 Blade angle adjusting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811322790.XA CN109026757B (en) 2018-11-08 2018-11-08 Blade angle adjusting device

Publications (2)

Publication Number Publication Date
CN109026757A true CN109026757A (en) 2018-12-18
CN109026757B CN109026757B (en) 2020-03-31

Family

ID=64614444

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811322790.XA Active CN109026757B (en) 2018-11-08 2018-11-08 Blade angle adjusting device

Country Status (1)

Country Link
CN (1) CN109026757B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112600374A (en) * 2020-12-15 2021-04-02 合肥恒大江海泵业股份有限公司 Synchronous rotation type blade angle adjusting device
CN113153821A (en) * 2021-04-28 2021-07-23 江苏大学 Flow self-adaptation stator adjusting device based on hydraulic drive

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014214895A (en) * 2013-04-23 2014-11-17 アイリスオーヤマ株式会社 Circulator
CN205298075U (en) * 2015-12-07 2016-06-08 江苏国泉泵业制造有限公司 Angle adjustment mechanism of axial -flow pump stator blade
CN206988134U (en) * 2017-06-20 2018-02-09 广东河海泵业机械有限公司 A kind of in-service adjusting means of follow-up motor type mechanical water pump blade angle
CN207437260U (en) * 2017-11-27 2018-06-01 湖北拓宇水电科技有限公司 A kind of modified hydraulic turbine, water pump blade angle hydraulic isochronous controller
CN108757552A (en) * 2018-08-05 2018-11-06 孙大飞 Full angle blade control device and its adjusting method
CN208950902U (en) * 2018-11-08 2019-06-07 合肥恒大江海泵业股份有限公司 A kind of adjustment of blade angle device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014214895A (en) * 2013-04-23 2014-11-17 アイリスオーヤマ株式会社 Circulator
CN205298075U (en) * 2015-12-07 2016-06-08 江苏国泉泵业制造有限公司 Angle adjustment mechanism of axial -flow pump stator blade
CN206988134U (en) * 2017-06-20 2018-02-09 广东河海泵业机械有限公司 A kind of in-service adjusting means of follow-up motor type mechanical water pump blade angle
CN207437260U (en) * 2017-11-27 2018-06-01 湖北拓宇水电科技有限公司 A kind of modified hydraulic turbine, water pump blade angle hydraulic isochronous controller
CN108757552A (en) * 2018-08-05 2018-11-06 孙大飞 Full angle blade control device and its adjusting method
CN208950902U (en) * 2018-11-08 2019-06-07 合肥恒大江海泵业股份有限公司 A kind of adjustment of blade angle device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112600374A (en) * 2020-12-15 2021-04-02 合肥恒大江海泵业股份有限公司 Synchronous rotation type blade angle adjusting device
CN112600374B (en) * 2020-12-15 2021-08-31 合肥恒大江海泵业股份有限公司 Synchronous rotation type blade angle adjusting device
CN113153821A (en) * 2021-04-28 2021-07-23 江苏大学 Flow self-adaptation stator adjusting device based on hydraulic drive

Also Published As

Publication number Publication date
CN109026757B (en) 2020-03-31

Similar Documents

Publication Publication Date Title
CN208950902U (en) A kind of adjustment of blade angle device
CN109026757A (en) A kind of adjustment of blade angle device
CN210453230U (en) A high-efficient mortar agitating unit for concrete production
CN210473753U (en) Novel high-speed dispersion machine
CN212867944U (en) Chemical industry crystallization centrifugal pump
CN208651190U (en) A kind of pedestal Liftable type pipeline pump
CN213773203U (en) Ecological bank protection of hydraulic engineering
CN209294076U (en) It is complete to adjust immersible pump
CN218644481U (en) Simple to operate's vertical self priming pump
CN208203583U (en) It is a kind of to move light gasoline water pump
CN209503010U (en) A kind of water pump pump case drilling equipment
CN209671543U (en) A kind of underwater multistage pressuring machine controlled change gear
CN208667026U (en) A kind of hanging device lifting maintenance device
CN220505428U (en) Sealed multistage centrifugal pump fixed knot constructs
CN113551947A (en) On-site sampling tool and sampling method for engineering cost budget
CN111852583A (en) Changeable quick type intermittent type barring gear
CN208519000U (en) A kind of commutation type hydraulic motor
CN109550445B (en) Dye printing liquid stirring device
CN220706023U (en) Water pump blade adjustment mechanism
CN206448910U (en) A kind of continuous grouting pump
CN109365856A (en) A kind of water pump pump case drilling equipment
CN218151381U (en) Combined type fracturing pump crosshead
CN220453190U (en) Water pump installation adjusting device
CN204753511U (en) Highly automated's water conservancy gate
CN211449067U (en) Centrifugal pump rotating speed adjusting device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A blade angle adjustment device

Effective date of registration: 20231129

Granted publication date: 20200331

Pledgee: Industrial and Commercial Bank of China Changfeng Branch

Pledgor: HEFEI HENGDA JIANGHAI PUMP Co.,Ltd.

Registration number: Y2023980068468