CN-224228885-U - Non-sealing submerged pump and liquid discharge equipment

CN224228885UCN 224228885 UCN224228885 UCN 224228885UCN-224228885-U

Abstract

The utility model discloses a sealless submerged pump and liquid draining equipment, which relates to the technical field of water pumps, wherein the sealless submerged pump comprises a pump body, the pump body comprises a driving part and a liquid inlet part which are connected with each other, the liquid inlet part is immersed in liquid, a pressurizing piece is arranged in the liquid inlet part, the side wall of the liquid inlet part is provided with a liquid inlet close to the driving part and a liquid outlet far away from the driving part, the liquid flows into the liquid inlet part from the liquid inlet and is discharged from the liquid outlet after being pressurized by the pressurizing piece, the pressurizing piece comprises a pump shaft, a separation layer is arranged between the liquid inlet part and the driving part, the pump shaft directly penetrates through the separation layer without dynamic sealing by canceling a mechanical sealing structure, a high-pressure area is concentrated on the side of the pump body close to the liquid outlet, the driving part is positioned in a low-pressure area, the requirement can be met only by simple static sealing, the position of the liquid inlet is prevented from sucking large-particle precipitated impurities, and even if water or air is suddenly lost, the problem of sealing failure is not caused by idling is solved, and the service life and the applicability is improved.

Inventors

LIU HAIBIN
CAO JIALI
FENG ENZE
ZHENG XU
ZHOU XIAO

Assignees

杭州南泵流体机械有限公司

Dates

Publication Date: 20260512
Application Date: 20250623

Claims (10)

1. A sealless submerged pump, comprising: the pump body comprises a driving part and a liquid inlet part which are connected with each other, and the liquid inlet part is immersed in liquid; A pressurizing piece is arranged in the liquid inlet part, a liquid inlet close to the driving part and a liquid outlet far away from the driving part are formed in the side wall of the liquid inlet part, and liquid flows into the liquid inlet part from the liquid inlet, is pressurized by the pressurizing piece and is discharged from the liquid outlet; The supercharging part comprises a pump shaft, a separation layer is arranged between the liquid inlet part and the driving part, and the pump shaft directly penetrates through the separation layer to be connected with a driving shaft of the driving part.
2. The sealless submerged pump of claim 1, wherein a first chamber and a second chamber are formed between the two ends of the pressurizing member and the housing of the liquid inlet portion, respectively, the first chamber being located at an end of the pressurizing member that is closer to the driving portion, the second chamber being located at an end of the pressurizing member that is farther from the driving portion, the liquid inlet communicating with the first chamber, the liquid outlet communicating with the second chamber; Wherein the pressure booster activates the first chamber at a lower pressure than the second chamber.
3. The sealless submerged pump of claim 2 wherein the booster further comprises an impeller fixedly connected to the pump shaft to drive the impeller to rotate about the pump shaft; The impeller is positioned between the liquid inlet and the liquid outlet, and liquid flows in from the liquid inlet and is discharged from the liquid outlet after being rotationally pressurized by the impeller.
4. The sealless submerged pump of claim 3, wherein the number of impellers is a plurality, and wherein the plurality of impellers are fixedly connected to the pump shaft and are spaced apart along the axial direction of the pump shaft.
5. A sealless submerged pump according to claim 3, wherein the inlet is provided with a filter screen.
6. The sealless submerged pump of claim 1, wherein the drive section includes a motor and a coupling through which the drive shaft of the motor is connected to the pump shaft.
7. The sealless submerged pump of claim 5, further comprising a tank, wherein the tank includes a cover and a tank, wherein the drive section is fixedly coupled to the cover, and wherein the liquid inlet section is positioned within the tank.
8. The sealless submerged pump of claim 7, wherein the outlet is connected with a drain pipe, the other end of the drain pipe remote from the outlet extending through the tank and being exposed.
9. The sealless submerged pump of claim 8, wherein the other end of the liquid outlet pipe that is remote from the liquid outlet extends through the cover and is exposed to the outside.
10. A drainage apparatus comprising a sealless submerged pump according to any one of claims 1 to 9.

Description

Non-sealing submerged pump and liquid discharge equipment Technical Field The utility model relates to the technical field of water pumps, in particular to a sealless submerged pump and liquid discharge equipment. Background As a common fluid conveying device, the submerged pump is widely applied to the field of industrial production, such as the scenes of machine tool cooling liquid circulation and the like. The traditional single-stage submerged pump is designed to be non-sealing, but the pump lift and the flow performance are seriously reduced, the pump efficiency is obviously reduced, and the pump is generally only suitable for low-performance scenes with low flow and lift requirements, and is difficult to meet the increasing high-flow and high-lift requirements of modern industrial production. In order to improve performance (high flow rate, high lift) and efficiency of submerged pumps, the mainstream and mature technical scheme in the industry at present is to seal a pump shaft by adopting a mechanical seal, but the mechanical seal is used for shaft sealing, the mechanical seal inevitably damages and leaks due to use problems, and the machine tool pump has frequent start-stop requirements, so that pressure impact is formed on the mechanical seal, the damage is accelerated, and secondly, hard particles in a medium can aggravate abrasion of a sealing surface, and the filling of liquid in the pump must be ensured, otherwise, the dry grinding is damaged, and the conventional mechanical seal is difficult to meet the requirements of the submerged pump which is high in pressure, contains impurities and needs frequent start-stop on long-term reliable operation. Disclosure of utility model The utility model mainly aims to provide a sealless submerged pump and liquid discharge equipment, which aim to improve the reliability and applicability of the pump. In order to achieve the above object, the present utility model provides a sealless submerged pump comprising: the pump body comprises a driving part and a liquid inlet part which are connected with each other, and the liquid inlet part is immersed in liquid; A pressurizing piece is arranged in the liquid inlet part, a liquid inlet close to the driving part and a liquid outlet far away from the driving part are formed in the side wall of the liquid inlet part, and liquid flows into the liquid inlet part from the liquid inlet, is pressurized by the pressurizing piece and is discharged from the liquid outlet; The supercharging part comprises a pump shaft, a separation layer is arranged between the liquid inlet part and the driving part, and the pump shaft directly penetrates through the separation layer to be connected with a driving shaft of the driving part. In an embodiment, a first chamber and a second chamber are respectively formed between the two ends of the pressurizing member and the shell of the liquid inlet part, the first chamber is positioned at one end of the pressurizing member close to the driving part, the second chamber is positioned at one end of the pressurizing member far away from the driving part, the liquid inlet is communicated with the first chamber, and the liquid outlet is communicated with the second chamber; Wherein the pressure booster activates the first chamber at a lower pressure than the second chamber. In one embodiment, the booster further comprises an impeller, and the impeller is fixedly connected with the pump shaft so as to drive the impeller to rotate around the pump shaft; The impeller is positioned between the liquid inlet and the liquid outlet, and liquid flows in from the liquid inlet and is discharged from the liquid outlet after being rotationally pressurized by the impeller. In an embodiment, the number of the impellers is multiple, and the impellers are fixedly connected with the pump shaft and are arranged at intervals along the axial direction of the pump shaft. In one embodiment, the liquid inlet is provided with a filter screen. In one embodiment, the drive section includes a motor and a coupling through which the drive shaft of the motor is connected to the pump shaft. In an embodiment, the water tank further comprises a cover body and a tank body, the driving part is fixedly connected with the cover body, and the liquid inlet part is positioned in the water tank. In an embodiment, the liquid outlet is communicated with a liquid outlet pipe, and the other end of the liquid outlet pipe, which is far away from the liquid outlet, penetrates through the water tank and is exposed outside. In an embodiment, the other end of the liquid outlet pipe away from the liquid outlet penetrates through the cover body and is exposed outside. The utility model also provides a liquid draining device, which comprises the sealless submerged pump. According to the technical scheme, a mechanical sealing structure is omitted, the liquid inlet is arranged at one end close to the driving part, the liquid outlet is arranged at one end