CN216842249U - Last-stage flow deflector of self-priming pump - Google Patents

Abstract

The utility model belongs to the technical field of self priming pump, refer in particular to a final stage baffle of self priming pump, including pump case, the rotation that has inlet and liquid outlet install pivot in the pump case and suit at the epaxial impeller of commentaries on classics, the impeller outside is equipped with the stator, have the clearance that supplies liquid reflux between stator excircle and the pump case inner wall, form the backward flow passageway, the stator is kept away from inlet one side and is equipped with the final stage baffle that is located the liquid outlet below, the final stage baffle is including connecting the guide plate on the stator and setting up the guide ring of keeping away from stator one side at the guide plate, the guide plate middle part is equipped with the through-hole and has formed the liquid passageway with the pivot, be equipped with the drain tank more than two on the guide ring lateral wall, the surface that the guide plate was kept away from the guide vane is equipped with a plurality of drainage plates that go out the liquid guide. The utility model discloses can promote the gas-liquid separation effect, strengthen from inhaling the effect, shorten from inhaling the time.

Description

Final-stage flow deflector of self-priming pump

The technical field is as follows:

the utility model belongs to the technical field of self priming pump, refer in particular to a final stage baffle of self priming pump.

The background art comprises the following steps:

the self-priming pump belongs to a self-priming centrifugal pump, and the working principle of the self-priming pump is that liquid is filled in a pump shell before the self-priming pump is started, an impeller rotates at high speed after the self-priming pump is started to enable the liquid in an impeller channel to flow to a volute, the pressure at an outlet end can be increased and the pressure at an inlet end is reduced after the liquid in the pump shell forms circulation, and the liquid is pumped when the pressure at the outlet end reaches the requirement of a lift.

The self priming pump is equipped with the pumping chamber including the pump case that has inlet and liquid outlet usually in the pump case, is equipped with the suit in the pumping chamber and is equipped with the stock solution room between pumping chamber and the inlet, the pump case with have the clearance that supplies the liquid reflux between pumping chamber, the stock solution room, form return channel, be equipped with the backward flow valve bottom return channel or stock solution room, at the self priming circulation in-process, the backward flow valve is opened, intercommunication stock solution room and return channel, at self priming pump normal operating condition, the backward flow valve is closed. In the self-priming process of the self-priming pump, the mixed liquid of liquid and gas in the pump shell enters from the suction inlet of the impeller, and under the action of centrifugal force generated by high-speed rotation of the impeller, the mixed liquid in the runner of the impeller is thrown out from the outlet of the impeller, the separated gas is discharged from the liquid outlet, and the gas which is not separated and the liquid flow back to the liquid storage chamber from the backflow channel and the backflow valve; and the liquid enters the circulation from the suction inlet of the impeller again until all gas mixed in the liquid is separated out, the self-sucking process is completed, the self-sucking pump enters a normal working state, and the liquid flows out from the liquid outlet.

The existing self-priming pump has poor gas-liquid separation effect, causes that liquid can enter a normal working state after being circulated for multiple times, and has poor self-priming effect and long self-priming time.

The invention content is as follows:

the utility model aims at providing a self priming pump's final stage baffle, it can promote the gas-liquid separation effect, strengthens from inhaling the effect, shortens from inhaling the time.

The utility model discloses a realize like this:

the utility model provides a self priming pump's last stage baffle, includes pump case, the rotation that has inlet and liquid outlet and installs pivot in the pump case and the suit is at epaxial impeller of commentaries on classics, the impeller outside is equipped with the stator, the clearance that has the confession liquid reflux between stator excircle and the pump case inner wall forms the backward flow passageway, the stator is kept away from inlet one side and is equipped with the last stage baffle that is located the liquid outlet below, last stage baffle is including connecting the guide plate on the guide blade and setting up the water conservancy diversion ring of keeping away from guide blade one side at the guide plate, the guide plate middle part is equipped with the through-hole and forms the liquid passageway with the pivot, be equipped with the drain tank more than two on the water conservancy diversion ring lateral wall, the surface that the guide plate was kept away from the guide blade is equipped with a plurality of drainage plates that go out the liquid guide.

In the last stage flow deflector of the self-priming pump, one end of each drainage plate is connected with the inner circle of the flow deflector, the other end of each drainage plate is connected with the inner circle of the flow deflector ring, and the two drainage plates form a drainage groove for guiding the liquid outlet groove.

In the final stage flow guide body of the self-priming pump, a guide inclined plane is arranged on the liquid outlet groove.

In the last-stage baffle of above-mentioned self priming pump, the baffle is close to stator one side and is equipped with the annular arch, be equipped with the annular groove with the protruding looks adaptation of annular on the stator, the baffle passes through the annular arch and annular groove and stator looks joint.

In the final stage flow deflector of the self-priming pump, twelve liquid outlet grooves are uniformly distributed on the circumference, and twelve flow guiding plates are uniformly distributed on the circumference.

In the final stage guide body of the self-priming pump, two impellers are arranged.

Compared with the prior art, the utility model outstanding advantage is:

1. the utility model discloses the guide vane is kept away from inlet one side and is equipped with the last stage baffle body that is located the liquid outlet below, the last stage baffle body includes the guide plate of connecting on the guide vane and sets up the guide ring that keeps away from guide vane one side at the guide plate, and the liquid that the inlet got into is through the guide vane outflow impact guide plate after the impeller pressure boost, effectively reduces the velocity of flow, reduces the cavitation in the pump, strengthens liquid-gas separation, reduces the cycle number, strengthens the self-priming effect, shortens self-priming time; the surface of the guide plate, which is far away from the guide vane, is provided with a plurality of drainage plates for guiding liquid to the liquid outlet groove, so that the strength of the guide plate can be enhanced while the liquid guiding effect is achieved, and the damage of the guide plate caused by liquid impacting the guide plate is prevented;

2. the utility model discloses a be equipped with the direction inclined plane on the drain tank, further strengthened the water conservancy diversion effect.

Description of the drawings:

fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a first perspective view of the final stage baffle of the present invention;

fig. 3 is a second perspective view of the final stage baffle of the present invention.

Reference numerals: 1. a pump housing; 11. a liquid inlet; 12. a liquid outlet; 13. a return channel; 14. a liquid passing channel; 2. a rotating shaft; 3. an impeller; 4. a guide vane; 5. a final stage flow conductor; 51. a baffle; 52. a flow guide ring; 53. a liquid outlet groove; 54. a drainage plate; 55. a drainage groove; 56. a guide slope; 57. an annular protrusion.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 3:

a final-stage flow guide body of a self-priming pump, which comprises a pump shell 1 with a liquid inlet 11 and a liquid outlet 12, a rotating shaft 2 rotatably arranged in the pump shell 1, and an impeller 3 sleeved on the rotating shaft 2, a guide vane 4 is arranged outside the impeller 3, a gap for liquid to flow back is arranged between the excircle of the guide vane 4 and the inner wall of the pump shell 1 to form a return channel 13, a final-stage flow guide body 5 positioned below the liquid outlet 12 is arranged on one side of the guide vane 4 far away from the liquid inlet 11, the final stage flow conductor 5 comprises a flow guide plate 51 connected to the guide vane 4 and a flow guide ring 52 arranged on a side of the flow guide plate 51 remote from the guide vane 4, the middle part of the guide plate 51 is provided with a through hole and forms a liquid passing channel 14 with the rotating shaft 2, the side wall of the guide ring 52 is provided with more than two liquid outlet grooves 53, the surface of the guide plate 51 far away from the guide vane 4 is provided with a plurality of flow guide plates 54 guiding the liquid to the liquid outlet groove 53.

The utility model discloses a theory of operation: as shown in fig. 1, the liquid entering from the liquid inlet 11 is pressurized by the impeller 3 and then flows out of the guide vane 4 to impact the guide plate 51, so that the flow velocity is effectively reduced, the cavitation in the pump is reduced, the liquid-gas separation is enhanced, the cycle number is reduced, the self-priming effect is enhanced, and the self-priming time is shortened; the liquid then flows through channel 14 into guide ring 52, then through guide plate 54 to exit slot 53, and finally to exit port 12. The strength of the guide plate 51 can be enhanced while the drainage plate 54 has a liquid guiding effect, and the guide plate 51 is prevented from being damaged due to liquid impacting the guide plate 51.

Structure of the drainage plate 54: as shown in fig. 2, one end of the drainage plate 54 is connected to the inner circle of the guide plate 51, and the other end is connected to the inner circle of the guide ring 52, and the two drainage plates 54 form a drainage groove 55 leading to the liquid outlet groove 53. The drainage groove 55 guides the liquid flowing out from the liquid passage 14 to the liquid outlet groove 53 for discharging the liquid.

In order to further enhance the flow guiding effect, the liquid outlet groove 53 is provided with a guiding inclined surface 56.

The connection mode of the guide vane 4 and the guide plate 51 is as follows: as shown in fig. 1 and 3, the guide plate 51 is provided with an annular protrusion 57 on one side close to the guide vane 4, the guide vane 4 is provided with an annular groove matched with the annular protrusion 57, and the guide plate 51 is clamped with the guide vane 4 through the annular protrusion 57 and the annular groove.

Preferably, twelve liquid outlet grooves 53 are uniformly distributed on the circumference, and twelve drainage plates 54 are uniformly distributed on the circumference. The liquid outlet grooves 53 are arranged, so that the liquid outlet performance can be ensured not to be reduced under the condition of effectively reducing the flow rate.

Further, two impellers 3 are provided. The utility model discloses well impeller 3 is provided with two, compares current four, six impeller 3's self priming pump, the utility model discloses pivot 2 is shorter, and pivot 2 rocks for a short time, and the noise of production is little.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims (6)

1. The utility model provides a final stage baffle of self priming pump, includes pump case (1) that has inlet (11) and liquid outlet (12), rotates pivot (2) of installing in pump case (1) and suit impeller (3) on pivot (2), impeller (3) outside is equipped with stator (4), have the clearance that supplies liquid reflux between stator (4) excircle and pump case (1) inner wall, form return channel (13), its characterized in that: stator (4) are kept away from inlet (11) one side and are equipped with final stage baffle (5) that are located liquid outlet (12) below, final stage baffle (5) are including connecting guide plate (51) on stator (4) and setting up guide ring (52) of keeping away from stator (4) one side in guide plate (51), guide plate (51) middle part is equipped with the through-hole and forms liquid passageway (14) with pivot (2), be equipped with liquid groove (53) more than two on guide ring (52) lateral wall, the surface that guide plate (51) were kept away from stator (4) is equipped with a plurality of drainage plates (54) of going out liquid groove (53) with liquid direction.

2. A final stage flow conductor for a self-primer pump in accordance with claim 1 wherein: one end of each drainage plate (54) is connected with the inner circle of the guide plate (51), the other end of each drainage plate is connected with the inner circle of the guide ring (52), and the two drainage plates (54) form a drainage groove (55) which is guided to the liquid outlet groove (53).

3. A final stage flow conductor for a self-primer pump in accordance with claim 1 wherein: the liquid outlet groove (53) is provided with a guide inclined plane (56).

4. A final stage flow conductor for a self-primer pump in accordance with claim 1 wherein: guide plate (51) are close to stator (4) one side and are equipped with annular protruding (57), be equipped with the annular groove with the protruding (57) looks adaptation of annular on stator (4), guide plate (51) are through protruding (57) of annular and annular groove and stator (4) looks joint.

5. The final stage flow conductor of a self-primer pump of claim 1 wherein: twelve liquid outlet grooves (53) are uniformly distributed on the circumference, and twelve drainage plates (54) are uniformly distributed on the circumference.

6. A final stage flow conductor for a self-primer pump in accordance with claim 1 wherein: the number of the impellers (3) is two.

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