Centrifugal self-priming pump
By reasonably combining the multi-stage centrifugal pump with the self-priming pump structure, the problem of water injection of the multi-stage centrifugal pump is solved, and the self-priming function is simplified and the self-priming function is achieved.
Patent Information
- Application Number
- CN202422133755.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-31
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-31
AI Technical Summary
The multi-stage centrifugal pump needs to be filled with sufficient water before each start, which is inconvenient to use.
The multi-stage centrifugal pump structure is reasonably combined with the self-priming pump structure. The centrifugal booster chamber, self-priming chamber and gas-liquid separation chamber are set up in the pump body, and connected through the return channel to achieve gas-liquid separation to form a vacuum. The self-priming function does not require water irrigation before each start.
The self-priming pump structure is realized under a small amount of water and liquid, which simplifies the start-up preparation process and improves the convenience of use.
Smart Images
Figure CN223062663U_ABST
Abstract
Description
Technical Field:
[0001] The utility model belongs to the technical field of water pumps, and particularly relates to a centrifugal self-priming pump. Background Art:
[0002] A multistage centrifugal pump generally includes a pump casing having a liquid inlet and a liquid outlet, at least one pressurizing chamber fixedly installed in the pump casing, and a rotating shaft rotatably installed on the pump casing. Each pressurizing chamber is provided with an impeller, and the impeller is fixed on the rotating shaft. Moreover, the more the number of pressurizing chambers and impellers, the higher the lift. It has the advantages of high lift, good stability, high efficiency, etc. However, before each start-up of the multistage centrifugal pump, it is necessary to pour a sufficient amount of water into the pump, which is rather troublesome in use. Summary of the Invention:
[0003] The purpose of the utility model is to provide a centrifugal self-priming pump, which reasonably combines the structure of a multistage centrifugal pump and the structure of a self-priming pump. Only a small amount of liquid needs to be stored in the pump body, and the self-priming pump structure can carry out gas-liquid separation to form a vacuum, so as to achieve the self-priming function, thus eliminating the need for filling water before each start-up and being more convenient to use.
[0004] The utility model is realized as follows:
[0005] A centrifugal self-priming pump includes a pump body having a water inlet and a water outlet, and a driving motor provided on the pump body. A centrifugal pressurizing chamber, a self-priming chamber with its water inlet end communicating with the centrifugal pressurizing chamber, and a gas-liquid separation chamber with its water inlet end communicating with the water outlet end of the self-priming chamber are provided in the pump body. A return channel is provided between the gas-liquid separation chamber and the self-priming chamber. The water inlet is opened on the centrifugal pressurizing chamber, the water outlet is opened on the gas-liquid separation chamber, and the rotating shaft of the driving motor sequentially penetrates into the self-priming chamber and the centrifugal pressurizing chamber. A self-priming impeller sleeved on the rotating shaft of the driving motor is provided in the self-priming chamber. One or more centrifugal impellers axially spaced and sleeved on the rotating shaft of the driving motor, and a guiding support cooperating with each centrifugal impeller and playing a guiding role are provided in the centrifugal pressurizing chamber.
[0006] In the above-mentioned centrifugal self-priming pump, the pump body includes a pump cover and a pump head connected to the driving motor through a connecting seat. A self-priming chamber is formed between the pump head and the connecting seat. A plurality of guiding shells are stacked between the pump cover and the pump head, and a centrifugal pressurizing chamber is formed between the pump cover, the guiding shells and the pump head. The guiding support is provided on each guiding shell, the centrifugal impeller is located between two adjacent guiding shells, and the gas-liquid separation chamber is provided in the pump head.
[0007] In the above-mentioned centrifugal self-priming pump, the water inlet is opened on the pump cover, and the water inlet and the rotating shaft of the driving motor are on the same axis.
[0008] In the above-mentioned centrifugal self-priming pump, a water injection port communicating with the outside is provided on the gas-liquid separation chamber, and a plug is detachably connected to the port of the water injection port.
[0009] In the above-mentioned centrifugal self-priming pump, a liquid blocking partition plate with an open upper end is arranged in the gas-liquid separation chamber, and the liquid blocking partition plate is located between the water inlet end of the liquid storage chamber and the reflux channel.
[0010] In the above-mentioned centrifugal self-priming pump, the middle part of the liquid blocking partition plate is of a notch structure.
[0011] The prominent advantages of the present utility model compared with the prior art are as follows:
[0012] The structure of the present utility model is simple, reasonably designed and low in cost. By reasonably combining the multi-stage centrifugal pump structure and the self-priming pump structure, only a small amount of water liquid needs to be stored in the pump body, and the self-priming pump structure can carry out gas-liquid separation to form a vacuum so as to achieve the self-priming function, so that it is not necessary to fill water before each start-up, which is more convenient to use and has a relatively long vacuum suction lift. Description of the drawings:
[0013] Figure 1 is a sectional view of the whole machine of the present utility model;
[0014] Figure 2 is a sectional view of the pump head of the present utility model.
[0015] In the figure: 1, water inlet; 2, water outlet; 3, drive motor; 4, centrifugal pressurization chamber; 5, self-priming chamber; 6, gas-liquid separation chamber; 7, reflux channel; 8, self-priming impeller; 9, centrifugal impeller; 10, guide bracket; 11, pump cover; 12, connecting seat; 13, pump head; 14, guide housing; 15, water injection port; 16, liquid blocking partition plate; 17, notch structure. Specific embodiments:
[0016] The following further describes the present utility model with specific embodiments. Refer to Figure 1 —2:
[0017] A centrifugal self-priming pump includes a pump body having a water inlet 1 and a water outlet 2, and a driving motor 3 disposed on the pump body. A centrifugal pressurization chamber 4, a self-priming chamber 5 with its water inlet end communicating with the centrifugal pressurization chamber 4, and a gas-liquid separation chamber 6 with its water inlet end communicating with the water outlet end of the self-priming chamber 5 are provided in the pump body. A reflux channel 7 is formed between the gas-liquid separation chamber 6 and the self-priming chamber 5. The water inlet 1 is opened on the centrifugal pressurization chamber 4, and the water outlet 2 is opened on the gas-liquid separation chamber 6. The rotating shaft of the driving motor 3 sequentially penetrates into the self-priming chamber 5 and the centrifugal pressurization chamber 4. A self-priming impeller 8 sleeved on the rotating shaft of the driving motor 3 is provided in the self-priming chamber 5. One or more centrifugal impellers 9 axially spaced and sleeved on the rotating shaft of the driving motor 3, and a flow guiding support 10 cooperating with each centrifugal impeller 9 and playing a guiding role are provided in the centrifugal pressurization chamber 4. Among them, the gas-liquid separation chamber 6 is located above the self-priming chamber 5, and the water outlet 2 is opened on the upper part of the gas-liquid separation chamber 6.
[0018] The structure of the utility model is simple, reasonably designed and low in cost. By reasonably combining the structure of a multistage centrifugal pump and the structure of a self-priming pump, only a small amount of water liquid needs to be stored in the pump body, and the self-priming pump structure can carry out gas-liquid separation to form a vacuum to achieve the self-priming function, so that it is not necessary to fill water before each start, and it is more convenient to use.
[0019] Furthermore, in this embodiment, the specific structure adopted by the pump body is as follows: The pump body includes a pump cover 11 and a pump head 13 connected to the driving motor 3 through a connecting seat 12. The self-priming chamber 5 is formed between the pump head 13 and the connecting seat 12. A plurality of flow guiding shells 14 are stacked between the pump cover 11 and the pump head 13, and the centrifugal pressurization chamber 4 is formed between the pump cover 11, the flow guiding shells 14 and the pump head 13. The flow guiding support 10 is disposed on each flow guiding shell 14. The centrifugal impeller 9 is located between two adjacent flow guiding shells 14. The gas-liquid separation chamber 6 is disposed in the pump head 13.
[0020] At the same time, to ensure that there is necessary water volume in the pump body when the pump stops, the water inlet 1 is opened on the pump cover 11, and the water inlet 1 and the rotating shaft of the driving motor 3 are on the same axis.
[0021] And in order to facilitate adding water liquid into the pump body when the product is started for the first time after installation, a water injection port 15 communicating with the outside is opened on the gas-liquid separation chamber 6, and a plug is detachably connected to the port of the water injection port 15.
[0022] In addition, in order to facilitate the rapid separation of the gas-liquid mixture in the gas-liquid separation chamber 6, an upper-end-uncapped liquid blocking partition 16 is provided in the gas-liquid separation chamber 6. The liquid blocking partition 16 is located between the water inlet end of the liquid storage chamber and the reflux channel 7. And, the middle part of the liquid blocking partition 16 is a notch structure 17.
[0023] The above embodiments are only one of the preferred embodiments of the present utility model, and do not limit the scope of implementation of the present utility model. Therefore, all equivalent changes made according to the shape, structure, and principle of the present utility model shall be covered within the protection scope of the present utility model.
Claims
1. A centrifugal self-priming pump, comprising a pump body having a water inlet (1) and a water outlet (2), and a drive motor (3) provided on the pump body, characterized in that: A centrifugal supercharging chamber (4), a self-priming chamber (5) with its water inlet end communicating with the centrifugal supercharging chamber (4), and a gas-liquid separation chamber (6) with its water inlet end communicating with the water outlet end of the self-priming chamber (5) are arranged in the pump body. A reflux channel (7) is provided between the gas-liquid separation chamber (6) and the self-priming chamber (5). The water inlet (1) is opened on the centrifugal supercharging chamber (4), and the water outlet (2) is opened on the gas-liquid separation chamber (6). The rotating shaft of the driving motor (3) sequentially penetrates into the self-priming chamber (5) and the centrifugal supercharging chamber (4). A self-priming impeller (8) sleeved on the rotating shaft of the driving motor (3) is arranged in the self-priming chamber (5). One or more centrifugal impellers (9) axially spaced and sleeved on the rotating shaft of the driving motor (3), and a guide bracket (10) cooperating with each centrifugal impeller (9) and playing a guiding role are arranged in the centrifugal supercharging chamber (4).
2. The centrifugal self-priming pump according to claim 1, wherein: The pump body includes a pump cover (11) and a pump head (13) connected to the driving motor (3) through a connecting seat (12). The self-priming chamber (5) is formed between the pump head (13) and the connecting seat (12). A plurality of guide shells (14) are stacked between the pump cover (11) and the pump head (13), and the centrifugal supercharging chamber (4) is formed among the pump cover (11), the guide shells (14) and the pump head (13). The guide bracket (10) is arranged on each guide shell (14). The centrifugal impeller (9) is located between two adjacent guide shells (14). The gas-liquid separation chamber (6) is arranged in the pump head (13).
3. The centrifugal self-priming pump according to claim 2, characterized in that: The water inlet (1) is opened on the pump cover (11), and the water inlet (1) and the rotating shaft of the driving motor (3) are on the same axis.
4. A centrifugal self-priming pump according to claim 1 or 2, characterized in that: A water injection port (15) communicating with the outside is opened on the gas-liquid separation chamber (6), and a plug is detachably connected to the port of the water injection port (15).
5. The centrifugal self-priming pump according to claim 1 or 2, characterized in that: An upper-end-uncapped liquid-blocking partition plate (16) is arranged in the gas-liquid separation chamber (6), and the liquid-blocking partition plate (16) is located between the water inlet end of the liquid storage chamber and the reflux channel (7).
6. The centrifugal self-priming pump according to claim 5, wherein: The middle part of the liquid-blocking partition plate (16) is a notch structure (17).