CN105221442A - A kind of lifting Verticle vortex pipeline mounted pump - Google Patents

A kind of lifting Verticle vortex pipeline mounted pump Download PDF

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Publication number
CN105221442A
CN105221442A CN201510626831.4A CN201510626831A CN105221442A CN 105221442 A CN105221442 A CN 105221442A CN 201510626831 A CN201510626831 A CN 201510626831A CN 105221442 A CN105221442 A CN 105221442A
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CN
China
Prior art keywords
base
pump housing
motor
pipeline
lifting
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.)
Withdrawn
Application number
CN201510626831.4A
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Chinese (zh)
Inventor
王迈宇
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.)
SHAOXING TAIKE PRECISION ELECTROMECHANICAL Co Ltd
Original Assignee
SHAOXING TAIKE PRECISION ELECTROMECHANICAL 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 SHAOXING TAIKE PRECISION ELECTROMECHANICAL Co Ltd filed Critical SHAOXING TAIKE PRECISION ELECTROMECHANICAL Co Ltd
Priority to CN201510626831.4A priority Critical patent/CN105221442A/en
Publication of CN105221442A publication Critical patent/CN105221442A/en
Withdrawn legal-status Critical Current

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Abstract

The invention discloses a kind of lifting Verticle vortex pipeline mounted pump, comprise the first motor and the pump housing, be fixedly connected with by middle bearing between first motor and body, the left and right sides of the pump housing is respectively arranged with drain pipe and liquid inlet pipe, the end of drain pipe and liquid inlet pipe is respectively arranged with fluid flange plate and feed liquor flange plate, the inside of the pump housing is provided with impeller, the bottom of the pump housing is provided with lowering or hoisting gear, the surrounding of lowering or hoisting gear is symmetrically arranged with at least four support guide rod, support guide rod connects the first motor by position-limit mechanism, the inwall of liquid inlet pipe is rotatably connected to one-way guide flow plate, vortex shedders is provided with in drain pipe.Structure of the present invention is simple, practical, by the outer installment lowering or hoisting gear at the pump housing, the installation that can meet different heights pipeline connects, prevent pipeline bending, improve precision and the intensity of connection, the vortex shedders in the pump housing can make liquid form the flowing of eddy current shape, pressure when improve flow of fluid and speed.

Description

A kind of lifting Verticle vortex pipeline mounted pump
Technical field
The present invention relates to a kind of lifting Verticle vortex pipeline mounted pump.
Background technique
Pipeline mounted pump is the one of single-suction single-stage or multistage centrifugal pump, belongs to vertical structure, and because it is imported and exported on the same line, and it is identical to import and export bore, imitative like a segment pipe, can be arranged on any position of pipeline.
Because the mounting point of pipeline is not sometimes on smooth ground, pipeline inclination can only be installed or modify to pipeline when connecting and is being connected with pipeline mounted pump by pipeline mounted pump of the prior art, not only reduce the efficiency of construction, and pipeline mounted pump is operationally unstable, and due to be obliquely installed can cause the joint of pipeline mounted pump due to local compression excessive and cause overflow, be not suitable for the conveying of dangerous liquid; Pipeline mounted pump of the prior art can only realize the straight line conveying of liquid, and therefore pressure does not have very large fluctuation, is unfavorable for conveying in the position that some vertical heights are larger.
Summary of the invention
The object of the invention is for the deficiency existing for prior art and provides a kind of technological scheme being elevated Verticle vortex pipeline mounted pump, by the outer installment lowering or hoisting gear at the pump housing, the installation that can meet different heights pipeline connects, prevent pipeline bending, improve precision and the intensity of connection, vortex shedders in the pump housing can make liquid form the flowing of eddy current shape, and pressure when improve flow of fluid and speed, one-way guide flow plate improves Security and the working life of pipeline mounted pump.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:
A kind of lifting Verticle vortex pipeline mounted pump, comprise the first motor and the pump housing, first motor is provided with power cord box, be fixedly connected with by middle bearing between first motor and the pump housing, the left and right sides of the pump housing is respectively arranged with drain pipe and liquid inlet pipe, the end of drain pipe and liquid inlet pipe is respectively arranged with fluid flange plate and feed liquor flange plate, the inside of the pump housing is provided with impeller, first motor connects impeller by rotating shaft, impeller is fixedly connected on the end of rotating shaft by positioning key, it is characterized in that: the bottom of the pump housing is provided with lowering or hoisting gear, the surrounding of lowering or hoisting gear is symmetrically arranged with at least four support guide rod, support guide rod connects the first motor by position-limit mechanism, the top of support guide rod is provided with limiting stopper, the inwall of liquid inlet pipe is rotatably connected to one-way guide flow plate, the central position of one-way guide flow plate is connected on the inwall of liquid inlet pipe by the first spring, vortex shedders is provided with in drain pipe, by the design of lowering or hoisting gear, pipeline mounted pump can be made more flexible when mounted, the pipeline that can meet different heights position connects, effectively improve the connection precision between pump and pipeline and join strength simultaneously, reduce the generation of leakage accident, can effectively prevent pipeline from occurring bending when connecting, and then affect flow velocity and the pressure size of liquid in pipeline, affect normal processing, support guide rod not only can play the effect of supplemental support, prevent pipeline mounted pump from operationally shaking, and the effect of guiding can be played when pipeline mounted pump is elevated, make the installation location of pipeline mounted pump more accurately reliable, limiting stopper can carry out spacing to the position of the first motor removing effectively, prevent position-limit mechanism from exceeding support guide rod and affect the normal mounting of pipeline mounted pump, pipeline opening can be closed when pipeline air pump inoperative by the one-way guide flow plate in liquid inlet pipe under the effect of the first spring, prevent some granule foreigns from entering the normal work affecting pipeline mounted pump in the pump housing, when pipeline mounted pump works, one-way guide flow plate can be opened under the promotion of liquid, liquid is made to enter next length of tubing by pipeline mounted pump, when dangerous liquids such as transporting petroleum, as long as there is no flow of fluid when meeting accident in pipeline, pipeline mounted pump can cut out, reduce loss, the liquid rotating of bottom horizontal flow sheet can be changed into the flowing of eddy current shape by vortex shedders, pressure when improve flow of fluid and speed.
Further, mechanical seal is provided with between rotating shaft and middle bearing, mechanical seal can prevent because fluid pressure is excessive and in overflow to the first motor, affect the normal work and use life-span of pipeline mounted pump effectively, simultaneously for the conveying safety and reliability of some dangerous liquids.
Further, lowering or hoisting gear comprises the first base and the second base, four right angles of the first base are symmetrically arranged with base fixing rod, the bottom of support guide rod is fixed on base fixing rod, second base is fixedly connected on the bottom of the pump housing, be connected by the second screw rod and auxiliary stand between second base with the first base, the second motor is provided with in first base, second motor connects the second screw rod by gear, base fixing rod increases the area of contact between the first base and ground, make pipeline mounted pump more stable when mounted, under the effect of the second motor, the movement of the second screw rod is driven by the rotation of gear, realize the lifting of the second base, and then the feed liquor flange plate of pipeline mounted pump and fluid flange plate can be made to arrive the position flushed with pipeline, improve the connection precision between pipeline and pipeline mounted pump and join strength.
Further, the side of the second base is provided with groove, in groove, mobile link has control panel, control panel is provided with display window, the below of display window is provided with rising switch and decline switch, and feed liquor flange plate, distance between fluid flange plate and pipe laying can show by display window, and by pressing the distance between rising switch and decline switch-mode regulation interface, be convenient to install, reduce the labor intensity of operator.
Further, position-limit mechanism comprises positioning ring, connecting cantilever and positioning support pushing out ring, positioning ring is socketed in support guide rod, slide up and down along support guide rod, positioning ring is fixedly connected with positioning support pushing out ring by connecting cantilever, positioning supports ring set is connected in middle bearing, when the first motor is when rising or decline, by positioning support pushing out ring, active force is directly acted on connecting cantilever, connecting cantilever can by force transmission on positioning ring, and by four support guide rod by the radial effect equilibrium of forces of the first motor, improve stability during installation.
Further, liquid inlet pipe, drain pipe are all fixedly connected with the pump housing by stiffening rib, and stiffening rib can improve liquid inlet pipe, join strength between drain pipe and the pump housing effectively, extend the working life of pipeline mounted pump.
Further, vortex shedders comprises volution blade and fixed base, volution blade is positioned at the top of fixed base, synchronous machine is provided with in fixed base, the end face of fixed base is provided with locating groove, dwang is provided with in locating groove, the end face of dwang is fixedly connected with volution blade, the bottom of dwang connects synchronous machine by the first bolt rotary, volution blade can be connected on the inwall of pipeline by fixed base, and rotated under the effect of dwang by synchronous machine, realize the adjustment of volution blade different amount, liquid is made to form the eddy current shape of difformity size, to meet the needs of actual liquid conveying.
Further, fluid flange plate is provided with restraining groove, button is provided with in restraining groove, button is fixedly connected in restraining groove by the second spring, be provided with gate in drain pipe, gate is fixedly connected with button by positioning rod, by the design of gate, the uninterrupted of the port of drain pipe can be controlled, improve practicability and the flexibility of pipeline mounted pump.
The present invention, owing to have employed technique scheme, has following beneficial effect:
1, by the design of lowering or hoisting gear, pipeline mounted pump can be made more flexible when mounted, the pipeline that can meet different heights position connects, effectively improve the connection precision between pump and pipeline and join strength simultaneously, reduce the generation of leakage accident, effectively can prevent pipeline from occurring bending when connecting, and then affect flow velocity and the pressure size of liquid in pipeline, affect normal processing;
2, support guide rod not only can play the effect of supplemental support, prevents pipeline mounted pump from operationally shaking, and can play the effect of guiding when pipeline mounted pump is elevated, and makes the installation location of pipeline mounted pump more accurately reliable;
Pipeline opening can be closed when pipeline air pump inoperative by the one-way guide flow plate 3, in liquid inlet pipe under the effect of the first spring, prevent some granule foreigns from entering the normal work affecting pipeline mounted pump in the pump housing, when pipeline mounted pump works, one-way guide flow plate can be opened under the promotion of liquid, liquid is made to enter next length of tubing by pipeline mounted pump, when dangerous liquids such as transporting petroleum, as long as do not have flow of fluid when meeting accident in pipeline, pipeline mounted pump can cut out, reduce loss;
4, base fixing rod increases the area of contact between the first base and ground, make pipeline mounted pump more stable when mounted, under the effect of the second motor, the movement of the second screw rod is driven by the rotation of gear, realize the lifting of the second base, and then the feed liquor flange plate of pipeline mounted pump and fluid flange plate can be made to arrive the position flushed with pipeline, improve the connection precision between pipeline and pipeline mounted pump and join strength;
5, volution blade can be connected on the inwall of pipeline by fixed base, and rotated under the effect of dwang by synchronous machine, realize the adjustment of volution blade different amount, make liquid form the eddy current shape of difformity size, to meet the needs of actual liquid conveying.
Structure of the present invention is simple, practical, by the outer installment lowering or hoisting gear at the pump housing, the installation that can meet different heights pipeline connects, prevent pipeline bending, improve precision and the intensity of connection, the vortex shedders in the pump housing can make liquid form the flowing of eddy current shape, pressure when improve flow of fluid and speed, one-way guide flow plate improves Security and the working life of pipeline mounted pump.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is a kind of structural representation being elevated Verticle vortex pipeline mounted pump of the present invention;
Fig. 2 is the connection diagram of middle pump body of the present invention and the first motor;
Fig. 3 is the partial enlarged drawing at I place in Fig. 2;
Fig. 4 is the structural representation of vortex shedders in the present invention;
Fig. 5 is the structural representation of lowering or hoisting gear in the present invention.
In figure: 1-first motor; The 2-pump housing; 3-feed liquor flange plate; 4-fluid flange plate; 5-first base; 6-second base; 7-base fixing rod; 8-support guide rod; 9-positioning ring; 10-connecting cantilever; 11-positioning support pushing out ring; 12-power cord box; 13-stiffening rib; 14-limiting stopper; Bearing in 15-; 16-liquid inlet pipe; 17-drain pipe; 18-impeller; 19-one-way guide flow plate; 20-first spring; 21-vortex shedders; 22-rotating shaft; 23-positioning key; 24-mechanical seal; 25-restraining groove; 26-second spring; 27-button; 28-gate; 29-volution blade; 30-fixed base; 31-synchronous machine; 32-locating groove; 33-dwang; 34-first screw rod; 35-second screw rod; 36-second motor; 37-auxiliary stand; 38-groove; 39-control panel; 40-display window; 41-rising switch; 42-decline switch; 43-positioning rod.
Embodiment
As shown in Figures 1 to 5, for the present invention's one lifting Verticle vortex pipeline mounted pump, comprise the first motor 1 and the pump housing 2, first motor 1 is provided with power cord box 12, be fixedly connected with by middle bearing 15 between first motor 1 and the pump housing 2, the left and right sides of the pump housing 2 is respectively arranged with drain pipe 17 and liquid inlet pipe 16, liquid inlet pipe 16, drain pipe 17 is all fixedly connected with the pump housing 2 by stiffening rib 13, stiffening rib 13 can improve liquid inlet pipe 16 effectively, join strength between drain pipe 17 and the pump housing 2, extend the working life of pipeline mounted pump, the end of drain pipe 17 and liquid inlet pipe 16 is respectively arranged with fluid flange plate 4 and feed liquor flange plate 3, fluid flange plate 4 is provided with restraining groove 25, button 27 is provided with in restraining groove 25, button 27 is fixedly connected in restraining groove 25 by the second spring 26, gate 28 is provided with in drain pipe 17, gate 28 is fixedly connected with button 27 by positioning rod 43, by the design of gate 28, the uninterrupted of the port of drain pipe 17 can be controlled, improve practicability and the flexibility of pipeline mounted pump, the inside of the pump housing 2 is provided with impeller 18, first motor 1 connects impeller 18 by rotating shaft 22, impeller 18 is fixedly connected on the end of rotating shaft 22 by positioning key 23, mechanical seal 24 is provided with between rotating shaft 22 and middle bearing 15, mechanical seal 24 can prevent because fluid pressure is excessive and in overflow to the first motor 1 effectively, affect the normal work and use life-span of pipeline mounted pump, simultaneously for the conveying safety and reliability of some dangerous liquids.
The bottom of the pump housing 2 is provided with lowering or hoisting gear, lowering or hoisting gear comprises the first base 5 and the second base 6, four right angles of the first base 5 are symmetrically arranged with base fixing rod 7, the bottom of support guide rod 8 is fixed on base fixing rod 7, second base 6 is fixedly connected on the bottom of the pump housing 2, be connected by the second screw rod 35 and auxiliary stand 37 between second base 6 with the first base 5, the second motor 36 is provided with in first base 5, second motor 36 connects the second screw rod 35 by gear, base fixing rod 7 increases the area of contact between the first base 5 and ground, make pipeline mounted pump more stable when mounted, under the effect of the second motor 36, the movement of the second screw rod 35 is driven by the rotation of gear, realize the lifting of the second base 6, and then the feed liquor flange plate 3 of pipeline mounted pump and fluid flange plate 4 can be made to arrive the position flushed with pipeline, improve the connection precision between pipeline and pipeline mounted pump and join strength, the side of the second base 6 is provided with groove 38, in groove 38, mobile link has control panel 39, control panel 39 is provided with display window 40, the below of display window 40 is provided with rising switch 41 and decline switch 42, display window 40 can by feed liquor flange plate 3, distance between fluid flange plate 4 and pipe laying shows, and regulate distance between interface by pressing rising switch 41 and decline switch 42, be convenient to install, reduce the labor intensity of operator, by the design of lowering or hoisting gear, pipeline mounted pump can be made more flexible when mounted, the pipeline that can meet different heights position connects, effectively improve the connection precision between pump and pipeline and join strength simultaneously, reduce the generation of leakage accident, can effectively prevent pipeline from occurring bending when connecting, and then affect flow velocity and the pressure size of liquid in pipeline, affect normal processing.
The surrounding of lowering or hoisting gear is symmetrically arranged with at least four support guide rod 8, support guide rod 8 not only can play the effect of supplemental support, prevent pipeline mounted pump from operationally shaking, and the effect of guiding can be played when pipeline mounted pump is elevated, make the installation location of pipeline mounted pump more accurately reliable, support guide rod 8 connects the first motor 1 by position-limit mechanism, position-limit mechanism comprises positioning ring 9, connecting cantilever 10 and positioning support pushing out ring 11, positioning ring 9 is socketed in support guide rod 8, slide up and down along support guide rod 8, positioning ring 9 is fixedly connected with positioning support pushing out ring 11 by connecting cantilever 10, positioning support pushing out ring 11 is socketed in middle bearing 15, when the first motor 1 is when rising or decline, by positioning support pushing out ring 11, active force is directly acted on connecting cantilever 10, connecting cantilever 10 can by force transmission on positioning ring 9, and by four support guide rod 8 by the radial effect equilibrium of forces of the first motor 1, improve stability during installation, the top of support guide rod 8 is provided with limiting stopper 14, limiting stopper 14 can carry out spacing to the position of the first motor 1 movement effectively, prevent position-limit mechanism from exceeding support guide rod 8 and affect the normal mounting of pipeline mounted pump.
The inwall of liquid inlet pipe 16 is rotatably connected to one-way guide flow plate 19, the central position of one-way guide flow plate 19 is connected on the inwall of liquid inlet pipe 16 by the first spring 20, pipeline opening can be closed when pipeline air pump inoperative by the one-way guide flow plate 19 in liquid inlet pipe 16 under the effect of the first spring 20, prevent some granule foreigns from entering the normal work affecting pipeline mounted pump in the pump housing 2, when pipeline mounted pump works, one-way guide flow plate 19 can be opened under the promotion of liquid, liquid is made to enter next length of tubing by pipeline mounted pump, when dangerous liquids such as transporting petroleum, as long as there is no flow of fluid when meeting accident in pipeline, pipeline mounted pump can cut out, reduce loss, vortex shedders 21 is provided with in drain pipe 17, vortex shedders 21 comprises volution blade 29 and fixed base 30, volution blade 29 is positioned at the top of fixed base 30, synchronous machine 31 is provided with in fixed base 30, the end face of fixed base 30 is provided with locating groove 32, dwang 33 is provided with in locating groove 32, the end face of dwang 33 is fixedly connected with volution blade 29, the bottom of dwang 33 is rotationally connected synchronous machine 31 by the first screw rod 34, volution blade 29 can be connected on the inwall of pipeline by fixed base 30, and rotated under the effect of dwang 33 by synchronous machine 31, realize the adjustment of volution blade 29 different amount, liquid is made to form the eddy current shape of difformity size, to meet the needs of actual liquid conveying.
These are only specific embodiments of the invention, but technical characteristics of the present invention is not limited thereto.Any based on the present invention, for realizing substantially identical technique effect, done ground simple change, equivalent replacement or modification etc., be all covered by among protection scope of the present invention.

Claims (8)

1. a lifting Verticle vortex pipeline mounted pump, comprise the first motor and the pump housing, described first motor is provided with power cord box, be fixedly connected with by middle bearing between described first motor and the described pump housing, the left and right sides of the described pump housing is respectively arranged with drain pipe and liquid inlet pipe, the end of described drain pipe and described liquid inlet pipe is respectively arranged with fluid flange plate and feed liquor flange plate, the inside of the described pump housing is provided with impeller, described first motor connects described impeller by rotating shaft, described impeller is fixedly connected on the end of described rotating shaft by positioning key, it is characterized in that: the bottom of the described pump housing is provided with lowering or hoisting gear, the surrounding of described lowering or hoisting gear is symmetrically arranged with at least four support guide rod, described support guide rod connects described first motor by position-limit mechanism, the top of described support guide rod is provided with limiting stopper, the inwall of described liquid inlet pipe is rotatably connected to one-way guide flow plate, the central position of described one-way guide flow plate is connected to by the first spring on the inwall of described liquid inlet pipe, vortex shedders is provided with in described drain pipe.
2. one lifting Verticle vortex pipeline mounted pump according to claim 1, is characterized in that: be provided with mechanical seal between described rotating shaft and described middle bearing.
3. one lifting Verticle vortex pipeline mounted pump according to claim 1, it is characterized in that: described lowering or hoisting gear comprises the first base and the second base, four right angles of described first base are symmetrically arranged with base fixing rod, the bottom of described support guide rod is fixed on described base fixing rod, described second base is fixedly connected on the bottom of the described pump housing, be connected by the second screw rod and auxiliary stand between described second base with described first base, be provided with the second motor in described first base, described second motor connects described second screw rod by gear.
4. one lifting Verticle vortex pipeline mounted pump according to claim 3, it is characterized in that: the side of described second base is provided with groove, in described groove, mobile link has control panel, described control panel is provided with display window, and the below of described display window is provided with rising switch and decline switch.
5. one lifting Verticle vortex pipeline mounted pump according to claim 1, it is characterized in that: described position-limit mechanism comprises positioning ring, connecting cantilever and positioning support pushing out ring, described positioning ring is socketed in described support guide rod, slide up and down along described support guide rod, described positioning ring is fixedly connected with described positioning support pushing out ring by described connecting cantilever, and described positioning supports ring set is connected in described middle bearing.
6. one lifting Verticle vortex pipeline mounted pump according to claim 1, is characterized in that: described liquid inlet pipe, described drain pipe are all fixedly connected with the described pump housing by stiffening rib.
7. one lifting Verticle vortex pipeline mounted pump according to claim 1, it is characterized in that: described vortex shedders comprises volution blade and fixed base, described volution blade is positioned at the top of described fixed base, synchronous machine is provided with in described fixed base, the end face of described fixed base is provided with locating groove, dwang is provided with in described locating groove, the end face of described dwang is fixedly connected with described volution blade, and the bottom of described dwang connects described synchronous machine by the first bolt rotary.
8. one lifting Verticle vortex pipeline mounted pump according to claim 1, it is characterized in that: described fluid flange plate is provided with restraining groove, button is provided with in described restraining groove, described button is fixedly connected in described restraining groove by the second spring, be provided with gate in described drain pipe, described gate is fixedly connected with described button by positioning rod.
CN201510626831.4A 2015-09-28 2015-09-28 A kind of lifting Verticle vortex pipeline mounted pump Withdrawn CN105221442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510626831.4A CN105221442A (en) 2015-09-28 2015-09-28 A kind of lifting Verticle vortex pipeline mounted pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510626831.4A CN105221442A (en) 2015-09-28 2015-09-28 A kind of lifting Verticle vortex pipeline mounted pump

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CN105221442A true CN105221442A (en) 2016-01-06

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CN201510626831.4A Withdrawn CN105221442A (en) 2015-09-28 2015-09-28 A kind of lifting Verticle vortex pipeline mounted pump

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094343A (en) * 2018-01-28 2019-08-06 吴军 A kind of pump housing of corrosion resistance submerged pump maintenance easy to disassemble
CN110948214A (en) * 2019-12-16 2020-04-03 深圳海油工程水下技术有限公司 Assembling, connecting and mounting device for sea pipe flanges
CN110953164A (en) * 2018-09-26 2020-04-03 苏州轩扬泵业科技有限公司 Novel rotatable liftable formula water pump
CN112959681A (en) * 2021-01-26 2021-06-15 陈志英 Plastic pipe hot-melt connection processing method
CN114033668A (en) * 2021-11-08 2022-02-11 刘昌东 Pump valve installation base

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094343A (en) * 2018-01-28 2019-08-06 吴军 A kind of pump housing of corrosion resistance submerged pump maintenance easy to disassemble
CN110953164A (en) * 2018-09-26 2020-04-03 苏州轩扬泵业科技有限公司 Novel rotatable liftable formula water pump
CN110948214A (en) * 2019-12-16 2020-04-03 深圳海油工程水下技术有限公司 Assembling, connecting and mounting device for sea pipe flanges
CN110948214B (en) * 2019-12-16 2022-03-08 深圳海油工程水下技术有限公司 Assembling, connecting and mounting device for sea pipe flanges
CN112959681A (en) * 2021-01-26 2021-06-15 陈志英 Plastic pipe hot-melt connection processing method
CN114033668A (en) * 2021-11-08 2022-02-11 刘昌东 Pump valve installation base

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Application publication date: 20160106