CN107044423A - Self-priming multistage peripheral pump - Google Patents

Abstract

The invention provides a self-priming multistage vortex pump, which belongs to the technical field of water pumps. It solves the problem that most of the existing self-priming pumps are single-stage pumps, which have a low lift and cannot be used for high-rise water use. The self-priming multistage vortex pump includes a pump body with a vortex pump chamber inside, a pump shaft driven by a motor pierced in the vortex pump chamber, and an impeller located in the vortex pump chamber is sleeved on the pump shaft. There are several cavities arranged parallel to each other in the pump body. Several vortex pump cavities are arranged in series and each vortex pump cavity is provided with an impeller sleeved on the pump shaft. The connected water inlet, the pump body is also provided with a self-priming chamber connected with the last stage vortex pump chamber, and the self-priming chamber is equipped with an air-water separation structure. The invention has the characteristics of a self-priming pump and a vortex pump, effectively improves the lift, and is suitable for high-rise water use.

Description

Self-priming multistage vortex pump

technical field

The invention belongs to the technical field of water pumps, and relates to a vortex pump, in particular to a self-priming multistage vortex pump.

Background technique

Water pumps are widely used in daily life and agricultural production. The vortex pump is one of them. The vortex pump generally includes an impeller, a motor and a pump body. The output shaft of the motor passes through the pump body and is fixedly connected with the impeller located in the pump body. For the existing single-stage pumps, if the head or the flow rate is to be increased, structural changes are required, which will increase the cost virtually for the manufacturer, and increase unnecessary consumption for the customer. The vortex pump lacks a multi-stage impeller structure, and the single-stage head is low, which cannot adapt to the ever-changing market, which brings confusion to customers when choosing a water pump.

For this reason, the Chinese patent discloses a new type of multi-stage submersible vortex pump [authorized announcement number: CN 205478376U], which includes a pump body, a motor arranged above the pump body, and a pump shaft that is driven by the motor and penetrates through the pump body. There is a cavity in the pump body, and a partition plate is set in the pump body to divide the cavity into several pump chambers. Each pump chamber is equipped with an impeller set on the pump shaft, and the pump chambers at both ends are respectively equipped with water inlets and The water outlet and adjacent pump chambers are connected in series in sequence. Although the vortex pump is a multi-stage pump, it cannot be used as a self-priming pump because it has no self-priming function. The structure of the self-priming pump is disclosed in the patent with the authorized notification number CN203404094U. It includes a pump body, a water tank with a water inlet and a water outlet, and the water tank is provided with an air-water tank for dividing the water tank into a left chamber and a right chamber. Separation partition, the top of the left chamber is provided with a gas-water separation baffle. Most of the current self-priming pumps are single-stage pumps with low heads, which cannot be used for high-rise water use.

Contents of the invention

The object of the present invention is to propose a self-priming multi-stage vortex pump with self-priming function in view of the above-mentioned problems in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

The self-priming multi-stage vortex pump includes a pump body with a vortex pump chamber inside, a pump shaft driven by a motor pierced in the vortex pump chamber, and an impeller located in the vortex pump chamber is sleeved on the pump shaft. , it is characterized in that, there are several vortex pump chambers and they are arranged parallel to each other in the pump body, several vortex pump chambers are arranged in series and each vortex pump chamber is provided with an impeller sleeved on the pump shaft, the The pump body is provided with a water inlet that communicates with the first-stage vortex pump chamber, and the pump body is also provided with a self-priming chamber that communicates with the last-stage vortex pump chamber. The self-priming chamber is equipped with an air-water separate structure.

In the self-priming multistage vortex pump described above, the pump body includes a connecting seat, a pump cover and a pump cylinder arranged between the connecting seat and the pump cover, the motor is fixed on the connecting seat, and the pump shaft passes through the After passing through the connecting seat, it extends into the vortex pump cavity. A mechanical seal is provided between the connecting seat and the pump shaft, and the connecting seat, the pump barrel and the pump cover are fixedly connected by bolts.

In the above self-priming multi-stage vortex pump, there are two vortex pump chambers, a partition is fixed between the connecting seat and the pump cover through a positioning structure, and the first-stage vortex pump chamber is located on the side of the partition. On one side, the second-stage vortex pump chamber is located on the other side of the partition, and the first-stage vortex pump chamber communicates with the second-stage vortex pump chamber through a flow channel structure.

In the above self-priming multi-stage vortex pump, the flow passage structure includes a flow passage one located at the outlet of the first-stage vortex pump chamber and a flow passage two located at the inlet of the second-stage vortex pump chamber. Channel 1 is arranged opposite to the outlet of the second-stage vortex pump chamber, and the described flow channel 2 is arranged opposite to the inlet of the first-stage vortex pump chamber. or connected flow channel three.

Since the first-stage vortex pump chamber is parallel to the second-stage vortex pump chamber, that is, the inlet of the first-stage vortex pump chamber is opposite to the inlet of the second-stage vortex pump chamber, and the outlet of the first-stage vortex pump chamber is connected to the second-stage vortex pump chamber. The outlets of the chambers are opposite, and when the two impellers rotate, the water flow in the chamber of the first-stage vortex pump rotates in the same direction as the water flow in the chamber of the second-stage vortex pump.

In the above-mentioned self-priming multistage vortex pump, the first flow channel is set on the pump barrel, the second flow channel is set on the pump barrel, the third flow channel is set on the pump barrel and the flow path The third is spiral-shaped, and the direction of rotation of the third flow channel is the same as that of the water flow in the cavity of the first-stage vortex pump.

In the above self-priming multistage vortex pump, the first flow channel, the second flow channel and the third flow channel are located at the upper part of the pump barrel. When the water flows, it is easy to take away the gas in the upper part of the first-stage vortex pump chamber and the second-stage vortex pump chamber, so that the internal gas does not remain, and it is convenient for self-priming.

In the above self-priming multistage vortex pump, the positioning structure includes a threaded hole on the pump barrel extending radially along the pump barrel and a positioning hole on the partition plate opposite to the threaded hole. A positioning screw is connected in the threaded hole, and one end of the positioning screw extends into the positioning hole.

In the above-mentioned self-priming multi-stage vortex pump, the air-water separation structure includes an air-water separation plate located in the self-priming chamber and a baffle plate located above the air-water separation plate, the air-water separation plate and the baffle plate An air-water return port is provided between them, and a water outlet is provided on the upper part of the self-priming chamber.

In the above self-priming multi-stage vortex pump, the pump shaft is provided with a water throwing ring outside the connecting seat, and the water throwing ring is located between the connecting seat and the motor.

The working principle of the self-priming multi-stage vortex pump is as follows: the motor drives the pump shaft to rotate, the impeller located in the first-stage vortex pump chamber and the impeller located in the second-stage vortex pump chamber rotate simultaneously, and the water enters the second-stage vortex pump chamber from the water inlet. In the first-stage vortex pump cavity, after being pressurized by the first impeller, it enters the second-stage vortex pump cavity through the first flow channel, the third flow channel and the second flow channel, and then the water flow is pressurized by the second impeller. Then it enters the self-priming chamber, and is discharged from the water outlet after air-water separation.

Compared with the prior art, the self-priming multistage vortex pump has the following advantages:

By setting a self-priming chamber, the whole water pump has a self-priming function. At the same time, it is equipped with two vortex pump chambers to pressurize the water flow step by step, which can increase the head by more than double, effectively solving the problem of high-rise water use; The second and third flow channels are located on the upper part of the pump barrel, which can effectively take away the gas in the upper part of the first-stage vortex pump cavity and the upper part of the second-stage vortex pump cavity. The third flow channel is spiral-shaped, and the direction of rotation is the same as that of the water flow , reduce hydraulic loss.

Description of drawings

Fig. 1 is a schematic structural view of a vortex pump provided by the present invention.

Fig. 2 is a sectional view of the pump body provided by the present invention.

Fig. 3 is a sectional view at A-A in Fig. 2 provided by the present invention.

Fig. 4 is a sectional view at B-B in Fig. 2 provided by the present invention.

Fig. 5 is a sectional view at C-C in Fig. 2 provided by the present invention.

In the figure, 1. pump shaft; 2. impeller; 3. water inlet; 4. self-priming chamber; 5. connecting seat; 6. pump cover; 7. pump barrel; 8. mechanical seal; Positioning screw; 11. Runner 1; 12. Runner 2; 13. Runner 3; 14. Air-water separation plate; 15. Baffle; 16. Air-water return port; 17. Water outlet; 18. Water throwing ring .

detailed description

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

The self-priming multi-stage vortex pump shown in Figure 1 includes a pump body with a vortex pump chamber inside, a pump shaft 1 driven by a motor pierced in the vortex pump chamber, and a pump shaft 1 is set on the vortex pump. The impeller 2 in the cavity, the vortex pump cavity is two and arranged parallel to each other in the pump body, the two vortex pump cavities are arranged in series and each vortex pump cavity is provided with an impeller 2 sleeved on the pump shaft 1, the pump The body is provided with a water inlet 3 communicating with the first-stage vortex pump chamber, and the pump body is also provided with a self-priming chamber 4 communicating with the last-stage vortex pump chamber. The self-priming chamber 4 is provided with an air-water separation structure.

As shown in Figure 1, the pump body includes a connecting seat 5, a pump cover 6 and a pump barrel 7 located between the connecting seat 5 and the pump cover 6, the motor is fixed on the connecting seat 5, and the pump shaft 1 passes through the connecting seat 5 Extending into the vortex pump cavity, a mechanical seal 8 is provided between the connecting seat 5 and the pump shaft 1, and the connecting seat 5, the pump barrel 7 and the pump cover 6 are fixedly connected by bolts.

As shown in Figure 1, a partition 9 is fixed between the connecting seat 5 and the pump cover 6 through a positioning structure, the first-stage vortex pump chamber is located on one side of the partition 9, and the second-stage vortex pump chamber is located on the other side of the partition 9 On one side, the first-stage vortex pump cavity communicates with the second-stage vortex pump cavity through a flow channel structure.

As shown in Figure 2, Figure 3, Figure 4 and Figure 5, the flow channel structure includes a flow channel 11 located at the outlet of the first-stage vortex pump chamber and a flow channel 2 12 located at the inlet of the second-stage vortex pump chamber. One 11 is arranged opposite to the outlet of the second-stage vortex pump chamber, and the second flow channel 12 is arranged opposite to the inlet of the first-stage vortex pump chamber. Runner three 13 .

Since the first-stage vortex pump chamber is parallel to the second-stage vortex pump chamber, that is, the inlet of the first-stage vortex pump chamber is opposite to the inlet of the second-stage vortex pump chamber, and the outlet of the first-stage vortex pump chamber is connected to the second-stage vortex pump chamber. The outlets of the chambers are opposite, and when the two impellers 2 rotate, the water flow in the chamber of the first-stage vortex pump rotates in the same direction as the water flow in the chamber of the second-stage vortex pump.

As shown in Figure 2, the first flow channel 11 is set on the pump barrel 7, the second flow channel 12 is set on the pump barrel 7, the third flow channel 13 is set on the pump barrel 7 and the third flow channel 13 is in a spiral shape, and the third flow channel 13 is arranged on the pump barrel 7. The direction of rotation of 13 is the same as that of the water flow in the chamber of the first stage vortex pump.

In this embodiment, the first flow channel 11 , the second flow channel 12 and the third flow channel 13 are located on the upper part of the pump barrel 7 . When the water flows, it is easy to take away the gas in the upper part of the first-stage vortex pump chamber and the second-stage vortex pump chamber, so that the internal gas does not remain, and it is convenient for self-priming.

As shown in Figure 1, the positioning structure includes a threaded hole extending radially along the pump barrel 7 on the pump barrel 7 and a positioning hole opposite to the threaded hole on the partition 9, and a positioning screw is connected in the threaded hole 10. One end of the positioning screw 10 extends into the positioning hole.

As shown in Figure 5, the air-water separation structure comprises an air-water separation plate 14 arranged in the self-priming chamber 4 and a baffle plate 15 arranged above the air-water separation plate 14, between the air-water separation plate 14 and the baffle plate 15 An air-water return port 16 is provided, and a water outlet 17 is provided on the upper part of the self-priming chamber 4 .

As shown in FIG. 1 , the pump shaft 1 is sheathed with a water throwing ring 18 located outside the connecting seat 5 , and the water throwing ring 18 is located between the connecting seat 5 and the motor.

The working principle of this self-priming multi-stage vortex pump is as follows: the motor drives the pump shaft 1 to rotate, the impeller 2 located in the first-stage vortex pump cavity and the impeller 2 located in the second-stage vortex pump cavity rotate simultaneously, and the water flows from the water inlet. 3 into the first-stage vortex pump cavity, pressurized by the first impeller 2, and then enter the second-stage vortex pump cavity through the first flow channel 11, the third flow channel 13 and the second flow channel 12, and then the second Each impeller 2 pressurizes the water flow, then enters the self-priming chamber 4, and is discharged from the water outlet 17 after air-water separation.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (9)

1. a kind of self-priming multistage peripheral pump, including the internal pump housing with vortex pump chamber, be arranged in peripheral pump intracavitary by electricity The impeller (2) positioned at peripheral pump intracavitary is arranged with the pump shaft (1) of machine driving, described pump shaft (1), it is characterised in that described Vortex pump chamber is several and is parallel to each other in the pump housing, some vortex pump chambers are arranged in series and each peripheral pump intracavitary is equal Provided with an impeller being sheathed on pump shaft (1) (2), the described pump housing is provided with the water inlet connected with first order vortex pump chamber (3), it is additionally provided with the self-priming chamber (4) connected with afterbody vortex pump chamber, described self-priming chamber (4) and is provided with the described pump housing Gas-water separation structure.

2. self-priming multistage peripheral pump according to claim 1, it is characterised in that the described pump housing include connecting seat (5), Pump cover (6) and the pump barrel (7) between connecting seat (5) and pump cover (6), motor are fixed on connecting seat (5), described pump shaft (1) peripheral pump intracavitary is stretched to after passing through connecting seat (5), mechanical seal is provided between described connecting seat (5) and pump shaft (1) (8), it is connected between described connecting seat (5), pump barrel (7) and pump cover (6) by bolt.

3. self-priming multistage peripheral pump according to claim 2, it is characterised in that described vortex pump chamber is two, institute Dividing plate (9) is fixed with by location structure between the connecting seat (5) and pump cover (6) stated, first order vortex pump chamber is located at dividing plate (9) Side, second level vortex pump chamber is located at the opposite side of dividing plate (9), and first order vortex pump chamber and second level vortex pump chamber pass through stream Road fabric connectivity.

4. self-priming multistage peripheral pump according to claim 3, it is characterised in that described flow passage structure includes being located at the The runner one (11) and the runner two (12) positioned at second level vortex pump chamber import in one-level vortex pump chamber exit, described runner One (11) and the outlet of second level vortex pump chamber are oppositely arranged, the import phase of described runner two (12) and first order vortex pump chamber To setting, the runner three (13) for both to be connected is additionally provided between described runner one (11) and runner two (12).

5. self-priming multistage peripheral pump according to claim 4, it is characterised in that described runner one (11) is located at pump barrel (7) on, described runner two (12) is on pump barrel (7), and described runner three (13) is located on pump barrel (7) and runner three (13) In volute, the rotation direction of the runner three (13) is identical with flowing to for first order peripheral pump intracavitary current.

6. self-priming multistage peripheral pump according to claim 5, it is characterised in that described runner one (11), runner two (12) and runner three (13) be located at pump barrel (7) top.

7. self-priming multistage peripheral pump according to claim 3, it is characterised in that described location structure includes being located at pump The screwed hole radially extended along pump barrel (7) on cylinder (7) and the positioning hole being oppositely arranged with screwed hole on dividing plate (9), Positioning screw (10) is connected with described screwed hole, one end of the positioning screw (10) is stretched in positioning hole.

8. self-priming multistage peripheral pump according to claim 1, it is characterised in that described gas-water separation structure includes setting In the gas-water separation plate (14) in self-priming chamber (4) and the baffle plate (15) above gas-water separation plate (14), the gas-water separation plate (14) air water refluxing opening (16) is provided between baffle plate (15), the top of self-priming chamber (4) is provided with delivery port (17).

9. self-priming multistage peripheral pump according to claim 1, it is characterised in that be arranged with position on described pump shaft (1) Throw rijng (18) on the outside of connecting seat (5), described throw rijng (18) is located at connecting seat (5) between motor.