CN216665927U - Shock attenuation anti cavitation centrifugal pump - Google Patents
Shock attenuation anti cavitation centrifugal pump Download PDFInfo
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- CN216665927U CN216665927U CN202123307155.4U CN202123307155U CN216665927U CN 216665927 U CN216665927 U CN 216665927U CN 202123307155 U CN202123307155 U CN 202123307155U CN 216665927 U CN216665927 U CN 216665927U
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- centrifugal pump
- cavitation
- bottom plate
- damping
- water pumping
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Abstract
The utility model relates to a damping anti-cavitation centrifugal pump, and belongs to the technical field of mechanical manufacturing. Comprises a centrifugal pump, a damping device and an anti-cavitation device; the anti-cavitation device comprises a double-layer water pumping pipe, a filtering water pumping box and a liquid level relay, wherein one end of the water pumping pipe is fixedly connected with a liquid inlet of the centrifugal pump, the other end of the water pumping pipe is fixedly connected with the top of the filtering water pumping box, and the double-layer water pumping pipe is provided with a water inlet valve and a water outlet valve; the filtration pumping box comprises a top plate and a bottom plate, the top plate and the bottom plate are correspondingly provided with clamping grooves, the top plate and the bottom plate are detachably connected through the clamping grooves and four filter plates, and the liquid level relay is connected with a power supply and is electrically connected with a motor of the centrifugal pump through an alternating current contactor. The utility model solves the problems of noise generated by vibration of the centrifugal pump base and the bottom surface and cavitation of the centrifugal pump when the centrifugal pump works, prolongs the service life of the centrifugal pump, and reduces the use cost and the working noise.
Description
Technical Field
The utility model relates to the field of machine manufacturing, in particular to a damping anti-cavitation centrifugal pump.
Background
A pump is a machine that delivers or pressurizes a fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, causing the liquid energy to increase. The pump is mainly used for conveying liquid such as water, oil, acid-base liquid, emulsion, suspension emulsion, liquid metal and the like, and can also convey liquid, gas mixture and liquid containing suspended solids; in mining and metallurgical industries, a mine needs to be drained by a pump, and a pump needs to be used for supplying water in the processes of ore dressing, smelting and rolling; in agricultural production, pumps are the primary irrigation and drainage machines. The impeller pump is a centrifugal pump, and the centrifugal pump is an impeller pump.
At present, water conservancy transportation is in a rapid development stage, a centrifugal pump plays an important role in water conservancy transportation, the working principle of the centrifugal pump is that fluid is sucked from a low-pressure side, then is pressurized by a rotary impeller arranged in a pump shell and then is discharged from a high-pressure side, and the fluid obtains kinetic energy and static pressure energy in the process. Meanwhile, air is sucked in during the operation of the centrifugal pump, so that a serious cavitation effect is generated on the blades of the centrifugal pump, the blades of the centrifugal pump are greatly damaged, and a gas binding effect is generated on the motor in serious cases, so that the motor is burnt out.
Cavitation erosion, the phenomenon of cavitation-like corrosion damage to the metal surface in contact with a fluid under conditions of high-speed flow and pressure changes. It often occurs in a high-speed decompression zone such as the tip of a centrifugal pump blade, where cavities are formed, which are crushed in the high-pressure zone and generate an impact pressure, which damages the protective film on the metal surface and increases the corrosion rate. The cavitation erosion is characterized in that a plurality of fine pits are formed on the surface of metal, and then holes are formed by gradually enlarging. After cavitation, the water pump flow-through part is seriously damaged due to the combined action of mechanical denudation, chemical corrosion and electrochemical corrosion.
The cavitation causes are: the material of the impeller of the existing centrifugal pump can not resist cavitation, and the coating of the impeller structure of the existing centrifugal pump is unreasonable in design; air is mixed into the water pumping pipe to generate vortex and bias flow, so that the flow state at the inlet of the impeller is disordered to generate bubbles; impurities are mixed into the liquid inlet, the water pumping pipe or the liquid inlet loses hydraulic power, the effective cavitation allowance of the centrifugal pump is reduced, the sand content of a water source is too high, and the cavitation performance of the water pump is deteriorated due to the fact that the overflowing part is abraded by the sand; centrifugal pumps operate at low flow or no load for long periods of time.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of defects and deficiencies in the prior art, the utility model provides a damping anti-cavitation centrifugal pump, which solves the cavitation problem caused by air or sundries mixed in the centrifugal pump and liquid with overhigh temperature vaporizing, prolongs the service life of the centrifugal pump and reduces the production cost; the problem that the noise is generated when the centrifugal pump works to influence the normal life of surrounding residents is solved, and the environmental protection performance of the centrifugal pump is improved.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a shock-absorbing anti-cavitation centrifugal pump comprises a centrifugal pump, a shock-absorbing device and an anti-cavitation device; damping device rigid coupling is in the centrifugal pump bottom, anti cavitation device includes double-deck drinking-water pipe, filters suction box, liquid level relay, drinking-water pipe one end and centrifugal pump inlet rigid coupling, the other end and filtration suction box top rigid coupling, set up water intaking valve and outlet valve on the double-deck drinking-water pipe, it includes roof and bottom plate to filter the suction box, it sets up the draw-in groove to correspond on roof and the bottom plate, roof and bottom plate pass through the draw-in groove and can dismantle with four filter plates and be connected, liquid level relay is connected with the power and is connected with the centrifugal pump motor electricity through ac contactor.
Furthermore, the anti-cavitation device also comprises an impeller, and tip protrusions are arranged on blades of the impeller.
Furthermore, the damping device comprises a first bottom plate, the top end of the first bottom plate is fixedly connected with the bottom of the centrifugal pump, damping springs are arranged at four corners of the bottom of the first bottom plate, and the bottom ends of the damping springs are fixedly connected with a second bottom plate.
Further, the length of the water pumping pipe is at least 4 times of the diameter of the liquid inlet.
Furthermore, the impeller and the pump shell of the centrifugal pump are provided with cadmium plating layers, and epoxy resin is coated outside the cadmium plating layers.
The utility model has the beneficial effects that: the vibration generated by the centrifugal pump base and the ground when the centrifugal pump works is reduced through the damping device; arranging a double-layer water pumping pipe, and cooling the double-layer water pumping pipe through a water inlet valve and a water outlet valve to reduce the temperature of liquid pumped by a centrifugal pump in the double-layer water pumping pipe; the flow speed of liquid is reduced by arranging the long water pumping pipe, so that the liquid at the liquid inlet is uniform in flow state; by arranging the filtering water pumping box, the damage of sundries in pumped liquid to a pump body is isolated, and the cavitation allowance of the centrifugal pump is improved; the detachable filter plate is arranged, so that the filter plate blockage caused by the long-term use of the centrifugal pump can be conveniently replaced and cleaned; the motor is controlled to be closed in time through the liquid level relay, so that the centrifugal pump is prevented from pumping liquid at a small flow rate for a long time, a large amount of oxygen is injected into the centrifugal pump, and even the centrifugal pump is prevented from generating suction; the tip bulge is arranged on the blade and breaks the bubbles before the bubbles contact the blade, so that the accumulation of the bubbles on the blade is reduced, and the cavitation damage of the bubbles to the blade is effectively prevented; the cadmium-plated layer and the coating epoxy resin are arranged to isolate the contact between media such as air, water and the like and the parent metal of the water pump impeller, so that the electrochemical corrosion and the corrosion are reduced to the maximum extent.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the structure of the impeller blade of the present invention.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 1 and 2, to solve the problems of defects and deficiencies in the prior art, the technical solution adopted by the present invention to solve the technical problems is: the technical scheme adopted by the utility model for solving the technical problem is as follows: a shock-absorbing anti-cavitation centrifugal pump comprises a centrifugal pump 1, a shock-absorbing device 2 and an anti-cavitation device; 2 rigid couplings of damping device are in 1 bottom of centrifugal pump, anti cavitation device includes double-deck drinking-water pipe 3, filters pumping box 4, liquid level relay 5, 3 one ends of double-deck drinking-water pipe and 1 inlet rigid coupling of centrifugal pump, the other end and the 4 top rigid couplings of filtration pumping box, set up water intaking valve 6 and outlet valve 7 on the double-deck drinking-water pipe 3, it includes roof and bottom plate to filter pumping box 4, it sets up the draw-in groove to correspond on roof and the bottom plate, roof and bottom plate pass through draw-in groove and four filter plates 8 and can dismantle the connection, liquid level relay 5 is connected with the power and is connected with the centrifugal pump motor electricity through ac contactor.
The anti-cavitation device further comprises an impeller, and a tip protrusion 11 is arranged on a blade 10 of the impeller.
The damping device 2 comprises a first bottom plate 21, the top end of the first bottom plate 21 is fixedly connected with the bottom of the centrifugal pump 1, damping springs 22 are arranged at four corners of the bottom of the first bottom plate 21, and the bottom ends of the damping springs 22 are fixedly connected with a second bottom plate 23.
The length of the double-layer water pumping pipe 3 is at least 4 times of the diameter of the liquid inlet.
The impeller and the pump shell of the centrifugal pump are provided with cadmium plating layers, and epoxy resin is coated outside the cadmium plating layers.
The utility model has the beneficial effects that: the vibration generated by the base of the centrifugal pump 1 and the ground when the centrifugal pump 1 works is reduced through the damping device 2; arranging a double-layer water pumping pipe 3, and cooling the double-layer water pumping pipe 3 through a water inlet valve 6 and a water outlet valve 7 to reduce the temperature of liquid pumped by the centrifugal pump 1; the flow speed of liquid is reduced by arranging the long water pumping pipe, so that the liquid at the liquid inlet is uniform in flow state; the damage of sundries in pumped liquid to a pump body is isolated by arranging the filtering water pumping box 4, and the cavitation allowance of the centrifugal pump is improved; the detachable filter plate is arranged, so that the filter plate 8 is convenient to replace and clean due to the blockage of the centrifugal pump 1 after long-term use; the liquid level relay 5 controls the motor to be closed in time, so that the centrifugal pump 1 is prevented from pumping liquid at a small flow rate for a long time, a large amount of oxygen is gushed into the centrifugal pump 1, and even the centrifugal pump 1 is prevented from generating air suction; the tip bulge 11 is arranged on the blade 10, and the tip bulge 11 breaks the bubbles before the bubbles contact the blade 10, so that the accumulation of the bubbles on the blade 10 is reduced, and the cavitation damage of the bubbles to the blade 10 is effectively prevented; the cadmium plating layer and the epoxy resin are arranged and coated to isolate the contact between media such as air, water and the like and the parent metal of the water pump impeller, so that the electrochemical corrosion and the corrosion are reduced to the maximum extent, in addition, the epoxy resin is a high molecular polymer, has chemical corrosion resistance, can improve the corrosion resistance of the centrifugal pump, and can greatly enhance the erosion resistance and the corrosion resistance of the centrifugal pump 1.
When the utility model is implemented, one end of a double-layer water pumping pipe 3 is connected with a liquid inlet of a centrifugal pump 1, one end of the double-layer water pumping pipe is connected with a filtering water pumping box 4, the filtering water pumping box 4 is placed into a liquid pumping pool 9, cold water is fed in through a water inlet valve 6 on the double-layer water pumping pipe 3, the double-layer water pumping pipe 3 is filled, a liquid level relay 5 is electrically connected with an alternating current contactor, the alternating current contactor is electrically connected with a motor, the liquid level relay 5 is a relay for controlling the liquid level, when the water level is reduced to a low liquid level, the liquid level relay 5 is started to control, the alternating current contactor is disconnected, the motor of the centrifugal pump 1 stops working, the situations that the double-layer water pumping pipe 2 generates cavitation and the centrifugal pump 1 idles due to the large amount of air sucked are avoided, when the liquid level is not lower than the liquid level of the liquid level relay 5, the motor is started, the centrifugal pump 1 pumps liquid, and the liquid is sent into the liquid inlet of the centrifugal pump 1 through the double-layer water pumping box 4, the liquid is pumped out from a liquid outlet of the centrifugal pump 1, and the tip protrusions 11 arranged on the impeller blades 10 enable bubbles in pumped liquid to be broken, so that cavitation damage of the blades 10 is reduced.
The foregoing shows and describes the general principles, principal features, and advantages of the utility model. The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a damping anti-cavitation centrifugal pump which characterized in that: comprises a centrifugal pump, a damping device and an anti-cavitation device; damping device rigid coupling is in the centrifugal pump bottom, anti cavitation device includes double-deck drinking-water pipe, filters suction box, liquid level relay, double-deck drinking-water pipe one end and centrifugal pump inlet rigid coupling, the other end and filter suction box top rigid coupling, set up water intaking valve and outlet valve on the double-deck drinking-water pipe, it includes roof and bottom plate to filter the suction box, it sets up the draw-in groove to correspond on roof and the bottom plate, roof and bottom plate pass through the draw-in groove and can dismantle with four filter plates and be connected, liquid level relay is connected with the power and is connected with the centrifugal pump motor electricity through ac contactor.
2. A vibration-damping anti-cavitation centrifugal pump according to claim 1, characterized in that: the anti-cavitation device further comprises an impeller, and tip protrusions are arranged on blades of the impeller.
3. A vibration-damping anti-cavitation centrifugal pump according to claim 1, characterized in that: the damping device comprises a first bottom plate, the top end of the first bottom plate is fixedly connected with the bottom of the centrifugal pump, damping springs are arranged at four corners of the bottom of the first bottom plate, and the bottom ends of the damping springs are fixedly connected with a second bottom plate.
4. A vibration-damping anti-cavitation centrifugal pump according to claim 1, characterized in that: the length of the water pumping pipe is at least 4 times of the diameter of the liquid inlet.
5. A vibration-damping anti-cavitation centrifugal pump according to claim 1, characterized in that: the impeller and the pump shell of the centrifugal pump are provided with cadmium plating layers, and epoxy resin is coated outside the cadmium plating layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123307155.4U CN216665927U (en) | 2021-12-27 | 2021-12-27 | Shock attenuation anti cavitation centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123307155.4U CN216665927U (en) | 2021-12-27 | 2021-12-27 | Shock attenuation anti cavitation centrifugal pump |
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| Publication Number | Publication Date |
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| CN216665927U true CN216665927U (en) | 2022-06-03 |
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| CN202123307155.4U Active CN216665927U (en) | 2021-12-27 | 2021-12-27 | Shock attenuation anti cavitation centrifugal pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045837A (en) * | 2022-08-12 | 2022-09-13 | 江苏振华海科装备科技股份有限公司 | Anti-cavitation centrifugal pump with vibration and noise reduction functions |
-
2021
- 2021-12-27 CN CN202123307155.4U patent/CN216665927U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045837A (en) * | 2022-08-12 | 2022-09-13 | 江苏振华海科装备科技股份有限公司 | Anti-cavitation centrifugal pump with vibration and noise reduction functions |
| CN115045837B (en) * | 2022-08-12 | 2022-11-11 | 江苏振华海科装备科技股份有限公司 | Anti-cavitation centrifugal pump with vibration and noise reduction functions |
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| 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 utility model: A shock absorption and anti cavitation centrifugal pump Effective date of registration: 20230601 Granted publication date: 20220603 Pledgee: Ningguo SME financing Company limited by guarantee Pledgor: ANHUI GOOD PUMP TECHNOLOGY CO.,LTD. Registration number: Y2023980042520 |