CN210315815U - Box-type variable-frequency water supply equipment - Google Patents
Box-type variable-frequency water supply equipment Download PDFInfo
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- CN210315815U CN210315815U CN201920318469.8U CN201920318469U CN210315815U CN 210315815 U CN210315815 U CN 210315815U CN 201920318469 U CN201920318469 U CN 201920318469U CN 210315815 U CN210315815 U CN 210315815U
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Abstract
The utility model relates to a water supply equipment field specifically is a box frequency conversion water supply equipment, which comprises a motor, the centrifugal pump includes the spiral case of intaking, go out the spiral case, spiral case and main shaft in the middle of at least one, the main shaft traversing is the spiral case of intaking, the volute of the spiral case of going out and middle spiral case, install first impeller on the main shaft is in the axial region of the spiral case of intaking, install middle impeller in the axial region of middle spiral case, install last stage impeller in the axial region of the spiral case of going out, first impeller delivery port in the spiral case of intaking is direct to be connected with middle impeller water inlet, direct and the butt joint of middle impeller water inlet of the circulation channel in the spiral case of intaking, water outlet department is provided with pressure sensor, motor and pressure sensor pass through the circuit and are. The utility model discloses change water supply volume of water supply installation when the water consumption increase or reduce, can effectively reduce rivers in spiral case shock loss's energy, and then reduce the progression of multistage formula centrifugal pump and simplify its structure.
Description
Technical Field
The utility model relates to a water supply equipment field specifically indicates a box frequency conversion water supply equipment.
Background
The water supply device is widely used in various industries to meet the requirements of water for life and production, and no mature solution is provided at present for solving the problem of how to change the water source supply quantity of the water supply device when the water consumption is increased or reduced. Meanwhile, a water supply device generally adopts a centrifugal pump to supply water, and at present, the centrifugal pump works by utilizing the rotation of an impeller to enable water to generate centrifugal motion. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller to be thrown into a water pressure pipeline of the water pump through a flow channel of the volute-shaped pump shell. The existing multistage centrifugal pump generally adopts a multistage impeller to accelerate the flow in a plurality of serpentine volutes, and a flow channel between every two adjacent volutes is in a 180-degree bent shape, so that the flow impacts the volutes to lose more energy after the flow flows out from a superior impeller, enters a next-stage impeller to accelerate after being bent by 180 degrees, and flows out of an outlet of the pump after the multistage acceleration. Because more energy is lost when the water flow impacts the volute, the general multi-stage centrifugal pump has more stages, and the purpose of flow rate improvement can be achieved. In order to solve the technical problems that the water source supply quantity of a water supply device is changed when the water consumption is increased or reduced, and more energy is lost when water flow impacts a volute, a box type variable-frequency water supply device is designed.
SUMMERY OF THE UTILITY MODEL
Based on the above problem, the utility model provides a box frequency conversion water supply equipment. The utility model discloses change water supply volume of water supply installation when the water consumption increase or reduce, can effectively reduce rivers in the spiral case loss of impact's energy simultaneously, and then reduce the progression of multistage formula centrifugal pump, simplify the structure of multistage formula centrifugal pump.
For solving the above technical problem, the utility model discloses a technical scheme as follows:
a box-type frequency conversion water supply device comprises a motor and a centrifugal pump, wherein the centrifugal pump comprises a water inlet volute, a water outlet volute, at least one middle volute and a main shaft, the main shaft transversely penetrates through the water inlet volute, the water outlet volute and a volute chamber of the middle volute, a water outlet communicated with the volute chamber inside the water inlet volute is formed in the water inlet volute, a water inlet communicated with the volute chamber inside the water outlet volute is formed in the water outlet volute, a first-stage impeller is installed on a shaft section of the main shaft, which is located in the water inlet volute, a middle impeller is installed on the shaft section of the middle volute, a last-stage impeller is installed on a shaft section of the water outlet volute, a water outlet of the first-stage impeller in the water inlet volute is directly connected with a water inlet of the middle impeller, a flow channel in the water inlet volute is directly butted with a water inlet of.
As a preferable mode, the water inlets and the water outlets between the intermediate impellers corresponding to the plurality of intermediate volutes are sequentially connected in a step shape, and the flow passages between the intermediate volutes are sequentially arranged in a step shape.
Preferably, the intermediate impeller water outlets at the ends of the intermediate impellers are connected with the final impeller water inlet, and the flow channels of the intermediate impellers at the ends of the intermediate impellers are directly butted with the final impeller water inlet.
Preferably, the intermediate impeller water outlets at the ends of the intermediate impellers are connected with the final impeller water inlet, and the flow channels of the intermediate impellers at the ends of the intermediate impellers are directly butted with the final impeller water inlet.
As a preferable mode, the outer wall surfaces of the water inlet volute and the water outlet volute are provided with main shaft fixing seats, two ends of the main shaft are arranged on the main shaft fixing seats, and the main shaft fixing seats are matched with the main shaft mounting seats to clamp and install bearings for lubricating the main shaft.
As a preferable mode, the main shaft fixing seat is detachably mounted on the water inlet volute and the water outlet volute through bolts.
As a preferable mode, the exterior of the water inlet volute, the water outlet volute and the plurality of middle volutes are connected through volute connecting rods and locked through volute connecting bolts.
Preferably, the water inlet volute and the plurality of middle volutes are provided with hollows to reduce the weight of the centrifugal pump.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model changes the water source supply quantity of the water supply device when the water consumption is increased or reduced, can effectively reduce the energy of impact loss of water flow in the volute, further reduce the number of stages of the multi-stage centrifugal pump and simplify the structure of the multi-stage centrifugal pump;
(2) the water inlets and the water outlets between the middle impellers corresponding to the middle volutes are sequentially connected in a step shape, the flow channels between the middle volutes are sequentially arranged in a step shape, and the flow channels and the water inlets which are arranged in the step shape are directly connected with the water outlets, so that the water flow output by each stage of impeller is prevented from directly and vertically striking on the inner wall surface of the volute, and the energy of the water flow impact loss in the volute is favorably reduced;
(3) the utility model discloses install the main shaft fixing base on the outer wall of water inlet spiral case and water outlet spiral case, the main shaft both ends are installed on the main shaft fixing base, the main shaft fixing base cooperates the main shaft mount pad to press from both sides the tight bearing of installing and being used for the main shaft lubrication, reduces the main shaft rotational friction resistance;
(4) the main shaft fixing seat of the utility model is detachably arranged on the water inlet volute and the water outlet volute through bolts, thereby facilitating the installation of the main shaft fixing seat and reducing the processing difficulty of the water inlet volute and the water outlet volute;
(5) the utility model discloses the spiral case connecting rod is connected through the spiral case connecting rod in the middle of water spiral case, play spiral case and a plurality of to through spiral case connecting bolt locking, through the screw rod spiral case of intaking in proper order, a plurality of middle spiral cases, play spiral case and inside parts separately, make things convenient for the connection assembly of integrated device.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The device comprises a frequency converter 1, a motor 2, a main shaft 3, a water inlet volute 4, a first-stage impeller 5, a water inlet 6, a last-stage impeller 7, a water outlet 8, a middle volute 9, a middle impeller 10, a pressure sensor 11, a water outlet volute 12, a main shaft fixing seat 13, a main shaft mounting seat 14, a volute connecting rod 15, a volute connecting bolt 16 and a shaft sleeve 17.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.
Example 1:
referring to fig. 1, a box-type frequency conversion water supply device comprises a motor 2 and a centrifugal pump, wherein the centrifugal pump comprises a water inlet volute 4, a water outlet volute 12, at least one middle volute 9 and a main shaft 3, the main shaft 3 transversely penetrates through the volute chambers of the water inlet volute 4, the water outlet volute 12 and the middle volute 9, the water inlet volute 4 is provided with a water outlet 8 communicated with the volute chamber inside, the water outlet volute 12 is provided with a water inlet 6 communicated with the volute chamber inside, the main shaft 3 is provided with a first-stage impeller 5 on the shaft section of the water inlet volute 4, the middle impeller 10 is arranged on the shaft section of the middle volute 9, a last-stage impeller 7 is arranged on the shaft section of the water outlet volute 12, the water outlet 8 of the first-stage impeller 5 in the water inlet volute 4 is directly connected with the water inlet 6 of the middle impeller 10, a flow channel in the water inlet volute 4 is directly butted with the water, the motor 2 and the pressure sensor 11 are connected with the frequency converter 1 through lines.
In the present embodiment, the frequency converter 1 is a prior art, and its main function is to control the rotation speed of the motor 2 by generating variable voltage and frequency, and further to control the water supply amount of the centrifugal pump. The pressure sensor 11 is prior art, and it is given frequency converter 1 through the pressure passback that detects 8 departments of delivery port, and when the water consumption reduced, 8 pressure increases in delivery port, and then frequency converter 1 reduces voltage and frequency, forces the motor 2 rotational speed to reduce to make the water supply of centrifugal pump reduce, then accomplish when outlet pressure is stable and reduce the control process that the centrifugal pump water supply satisfied user demand. On the contrary, when the water consumption is increased, the pressure of the water outlet 8 is increased, and then the frequency converter 1 increases the voltage and the frequency, so that the rotating speed of the motor 2 is increased, the water supply of the centrifugal pump is increased, and when the outlet pressure is stable, the water supply of the centrifugal pump is increased to meet the use requirement control process.
The water inlet volute 4, the water outlet volute 12 and the middle volute 9 are all in the prior art and can be selected conventionally. The primary impeller, the middle impeller 10 and the final-stage impeller 7 which are arranged on the main shaft 3 through keys, and can also be arranged on the main shaft 3 through other bolts in a locking way, the structural forms of the primary impeller, the middle impeller 10 and the final-stage impeller 7 are similar to those of the existing impeller, an impeller flow channel communicated from the center to the edge of the impeller is arranged on an impeller disc, and the impeller disc is different from the prior art in that: the prior art is that the impeller circulation channel is linear, so that water flow coming out of the impeller directly impacts the inner wall surface of the volute chamber, and the impeller circulation channel of the embodiment is bent in an arc shape by 90 degrees and is simultaneously butted with a water inlet of the middle impeller 10, so that the energy of impact loss of the water flow between the primary impeller and the middle impeller 10 on the inner wall surface of the volute chamber is reduced.
In order to further reduce the energy loss caused by impact of water flow on the inner wall surface of the volute chamber, the water inlets 6 and the water outlets 8 among the middle impellers 10 corresponding to the middle volutes 9 are sequentially connected in a step shape, and the flow channels among the middle volutes 9 are sequentially arranged in a step shape, so that the energy loss caused by impact of water flow among the middle impellers 10 on the inner wall surface of the volute chamber is avoided.
In order to further reduce the energy loss caused by impact of water flow on the inner wall surface of the volute chamber, the water outlets 8 of the middle impellers 10 at the tail ends of the middle impellers 10 are connected with the water inlet 6 of the last-stage impeller 7, and the circulation channels of the middle impellers 10 at the tail ends of the middle impellers 10 are directly butted with the water inlet 6 of the last-stage impeller 7, so that the energy loss caused by impact of water flow between the middle impellers 10 and the last-stage impeller 7 on the inner wall surface of the volute chamber is avoided.
In order to reduce the friction resistance of the rotation of the main shaft 3, the outer wall surfaces of the water inlet volute 4 and the water outlet volute 12 are provided with main shaft fixing seats 13, two ends of the main shaft 3 are arranged on the main shaft fixing seats 13, and the main shaft fixing seats 13 are matched with the main shaft mounting seats 14 to clamp and install bearings for lubricating the main shaft 3.
In order to facilitate the installation of the main shaft fixing seat 13 and reduce the processing difficulty of the water inlet volute 4 and the water outlet volute 12, the main shaft fixing seat 13 is detachably installed on the water inlet volute 4 and the water outlet volute 12 through bolts.
In order to facilitate the connection and assembly of the integral device, the water inlet volute 4, the water outlet volute 12 and the plurality of middle volutes 9 are connected through volute connecting rods 15 and locked through volute connecting bolts 16, and the water inlet volute 4, the plurality of middle volutes 9, the water outlet volute 12 and respective internal accessories thereof are sequentially connected through screws. In order to reduce the weight of the centrifugal pump, the water inlet volute 4 and the plurality of middle volutes 9 are provided with hollows.
The embodiment of the present invention is the above. The above embodiments and the specific parameters in the embodiments are only for the purpose of clearly expressing the verification process of the utility model, and are not used to limit the patent protection scope of the present invention, the patent protection scope of the present invention is still subject to the claims, all the structural changes equivalent to the contents of the description and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a box frequency conversion water supply equipment, includes motor (2), centrifugal pump, the centrifugal pump includes into water spiral case (4), goes out water spiral case (12), at least one middle spiral case (9) and main shaft (3), main shaft (3) transversely pass the volute of intaking spiral case (4), play water spiral case (12) and middle spiral case (9), be equipped with delivery port (8) rather than inside volute intercommunication on intaking spiral case (4), it is equipped with water inlet (6) rather than inside volute intercommunication to go out water spiral case (12), main shaft (3) are in and install first-stage impeller (5) on the shaft section of intaking spiral case (4), are in and install middle impeller (10) on the shaft section of middle spiral case (9), are in and install last-stage impeller (7) on the shaft section of play water spiral case (12), its characterized in that: the water outlet (8) of the first-stage impeller (5) in the water inlet volute (4) is directly connected with the water inlet (6) of the middle impeller (10), the flow channel in the water inlet volute (4) is directly butted with the water inlet (6) of the middle impeller (10), a pressure sensor (11) is arranged at the water outlet (8), and the motor (2) and the pressure sensor (11) are connected with the frequency converter (1) through lines.
2. The tank type variable-frequency water supply equipment according to claim 1, characterized in that: the outer wall surfaces of the water inlet volute (4) and the water outlet volute (12) are provided with a main shaft fixing seat (13), two ends of the main shaft (3) are arranged on the main shaft fixing seat (13), and the main shaft fixing seat (13) is matched with a main shaft mounting seat (14) to clamp and mount a bearing for lubricating the main shaft (3).
3. A tank type variable frequency water supply equipment according to claim 2, characterized in that: the main shaft fixing seat (13) is detachably arranged on the water inlet volute (4) and the water outlet volute (12) through bolts.
4. The tank type variable-frequency water supply equipment according to claim 1, characterized in that: shaft sleeves (17) are arranged on shaft sections between the first-stage impeller (5) and the middle impeller (10), between the middle impeller (10) and between the middle impeller (10) and the last-stage impeller (7) to ensure sealing between the impellers.
5. The tank type variable-frequency water supply equipment according to claim 1, characterized in that: the outsides of the water inlet volute (4), the water outlet volute (12) and the plurality of middle volutes (9) are connected through volute connecting rods (15) and locked through volute connecting bolts (16).
6. The tank type variable-frequency water supply equipment according to claim 1, characterized in that: the water inlet volute (4) and the plurality of middle volutes (9) are provided with hollows so as to reduce the weight of the centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920318469.8U CN210315815U (en) | 2019-03-13 | 2019-03-13 | Box-type variable-frequency water supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920318469.8U CN210315815U (en) | 2019-03-13 | 2019-03-13 | Box-type variable-frequency water supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210315815U true CN210315815U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920318469.8U Active CN210315815U (en) | 2019-03-13 | 2019-03-13 | Box-type variable-frequency water supply equipment |
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| Country | Link |
|---|---|
| CN (1) | CN210315815U (en) |
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2019
- 2019-03-13 CN CN201920318469.8U patent/CN210315815U/en active Active
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