CN215719575U - Water pump for conveying bilge oil sewage in diving chamber - Google Patents

Abstract

The utility model discloses a water pump for conveying bilge oil sewage in a diving chamber, which comprises a pump body, a motor and a machine sealing flange for connecting the motor and the pump body, wherein a water inlet is formed in the bottom end of one side of the pump body, a water outlet is formed in the top end of the pump body right above the water inlet, a plurality of groups of impellers arranged on an output shaft of the motor are arranged in an inner cavity of the pump body, a gas-liquid separation cavity is formed between the first-stage impeller positioned at the lowest part and the adjacent impeller, a backflow hole is formed in the first-stage guide vane of the first-stage impeller, and a flushing pipeline is arranged on one side surface of the pump body, back to the water inlet. The water pump for conveying the bilge oil sewage in the diving chamber has the characteristics of small volume, high discharge pressure and self-suction function, can still realize normal conveying of the bilge oil sewage when the diving depth of the diving chamber reaches more than 200 meters, and solves the problem of dredging and discharging the bilge oil sewage when the diving device works in deep diving for a long time.

Description

Water pump for conveying bilge oil sewage in diving chamber

Technical Field

The utility model belongs to the technical field of vertical multistage centrifugal pumps, and particularly relates to a water pump for conveying oil sewage at the bottom of a cabin in a diving cabin.

Background

The vertical multi-stage centrifugal pump is also called as CDLF vertical multi-stage centrifugal pump, which is designed and manufactured by absorbing the advanced technology at home and abroad.

In the service environment of the conventional self-priming pump, the installation space of the water pump is relatively large, the resistance of a discharge pipeline of the pump is also small, generally below 0.6Mpa, and the water pump is mainly in a combination form of a single-stage self-priming centrifugal pump or a single-stage centrifugal pump plus a self-priming device or a vacuum pump. However, when the bilge oil and sewage is dredged out of the submersible chamber, the water pump cannot meet the requirement of installation space, cannot overcome the discharge resistance caused by the submergence depth to discharge bilge water out of the submersible chamber, and the conventional multistage centrifugal pump also has a self-suction function. Therefore, it is necessary to provide a water pump having a self-priming function, which occupies a small space and has a large discharge pressure

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a water pump for conveying bilge oil and sewage in a diving chamber, so as to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a water pump for carrying bilge oil sewage in under-deck of diving cabin, includes the pump body, motor and connects the machine of motor and the pump body and seals the flange, one side bottom of the pump body is equipped with the water inlet to be equipped with the delivery port on the pump body top directly over the water inlet, the inner chamber of the pump body is provided with a plurality of groups and installs the impeller on the motor output shaft, wherein is located and forms the gas-liquid separation chamber between the first impeller of below and the adjacent impeller to it has the backward flow hole to open on the first stator of first impeller, is provided with the washing pipeline in the side at the water inlet place dorsad of the pump body, the washing pipeline is connected to the machine of pump body lower extreme by high pressure district and seals the position, and water pressure control valve and discharge valve are installed to the top of washing pipeline.

Furthermore, the end of the water inlet is provided with a first anti-rotation plate, the inner pipe of the gas-liquid separation cavity and the output shaft of the motor are symmetrically provided with two second anti-rotation plates, and the water inlet and the water outlet are respectively communicated with the upper end and the lower end of the inner cavity of the pump body.

Furthermore, the exhaust valve is communicated with the upper end of the pump body, the bottom end of the exhaust valve is communicated with the hydraulic control valve, and the hydraulic control valve is controlled to be opened and closed through pressure.

Furthermore, an organic seal oiling channel is formed in one side of the top end face of the mechanical seal flange, and the bottom end of the organic seal oiling channel is connected to the outer side of the friction position at the top of the pump body through an oil conveying pipe.

Furthermore, flange is installed to the tip of water inlet, just first anti-rotation plate installs between flange and water inlet, the second is prevented the board and is fixed at the lateral wall in gas-liquid separation chamber soon.

The utility model has the technical effects and advantages that: compared with the existing device, the water pump for conveying the bilge oil sewage in the diving chamber increases the height distance between the first-stage impeller and other impellers on the basis of the structure of the conventional vertical multi-stage pump to form a gas-liquid separation cavity and realize gas-liquid separation, and meanwhile, the backflow hole is designed on the first-stage guide vane, so that a medium falling back from the gas-liquid separation cavity in the self-priming process returns to the position of the first-stage impeller, and the self-priming of gas-liquid mixing-gas-liquid separation is continuously carried out with the gas at the inlet of the first-stage impeller; in addition, a circulating flushing pipeline with a mechanical seal is arranged, so that impurities at the position of the mechanical seal are prevented from being accumulated, the service life of the mechanical seal is guaranteed, a self-cooling structure is arranged at the back of the mechanical seal, namely, a channel is arranged at the back of a flange of the mechanical seal and connected to the outer side of a friction position, about 20ml of lubricating oil can be added through the channel regularly for cooling the mechanical seal in a self-suction process, the seal damage under the long-term self-suction working condition is avoided, and the water pump has the characteristics of small volume, high discharge pressure and self-suction function, can still realize the normal conveying of the oily water at the bottom of the cabin when the diving depth of the diving cabin reaches more than 200 meters, and solves the problem that the diving device drains the oily water at the bottom of the cabin during long-time deep diving work.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a pump body; 2. mechanically sealing the flange; 3. a water inlet; 4. a water outlet; 5. a first stage impeller; 6. a return orifice; 7. a first anti-rotation plate; 8. a second anti-rotation plate; 9. a gas-liquid separation chamber; 10. flushing the pipeline; 11. a hydraulic control valve; 12. an exhaust valve; 13. a machine seal refueling passage; 14. an electric motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a water pump for conveying oily sewage at the bottom of a cabin in a diving cabin comprises a pump body 1, a motor 14 and a machine sealing flange 2 for connecting the motor 14 and the pump body 1, wherein a water inlet 3 is arranged at the bottom end of one side of the pump body 1, a water outlet 4 is arranged at the top end of the pump body 1 right above the water inlet 3, a plurality of groups of impellers arranged on an output shaft of the motor 14 are arranged in an inner cavity of the pump body 1, a gas-liquid separation cavity 9 is formed between a first-stage impeller 5 positioned at the lowest part and an adjacent impeller, the gas-liquid separation cavity 9 is used for realizing gas-liquid separation, a backflow hole 6 is arranged on a first-stage guide vane of the first-stage impeller 5 so that a medium falling back from the gas-liquid separation cavity in a self-priming process returns to the first-stage impeller part, the self-priming process of gas-liquid-gas mixing and gas-liquid separation is continuously repeated with the gas at the inlet of the first-stage impeller, and backflow holes 6 are arranged on the two first-stage guide vanes, the conveying medium is bilge oil sewage, so a circulating flushing pipeline 10 with a mechanical seal is arranged, the machine seal is prevented from being accumulated by impurities, the service life of the machine seal is ensured, the flushing pipeline 10 is arranged on one side of the pump body 1 back to the water inlet 3, the flushing pipeline 10 needs to be connected to a lower end machine seal part from a high-pressure area, the pipeline can influence the self-priming effect in the self-priming stage of the pump, and a water pressure control valve 11 and an exhaust valve 12 are arranged above the flushing pipeline 10, so that the pressure is not built at the upper part of the pump when the water pump is self-primed, the flushing pipeline is in a closed state, the gas at the upper part cannot return to the inlet of the pump, and the self-priming effect is not influenced.

In order to prevent liquid from rotating in the water inlet 3 and the gas-liquid separation cavity 9 under the centrifugal action, a first anti-rotation plate 7 is arranged at the end part of the water inlet 3, two second anti-rotation plates 8 are symmetrically arranged on an inner pipe of the gas-liquid separation cavity 9 and an output shaft of the motor 14, so that the liquid can be limited from rotating in the water inlet 3 and the gas-liquid separation cavity 9, the gas-liquid separation is easier, and the water inlet 3 and the water outlet 4 are respectively communicated with the upper and lower ends of the inner cavity of the pump body 1. Flange is installed to the tip of water inlet 3, and first prevent revolving plate 7 and install between flange and water inlet 3, and second prevents revolving plate 8 and fixes the lateral wall at gas-liquid separation chamber 9, conveniently installs.

The exhaust valve 12 is communicated with the upper end of the pump body 1, the bottom end of the exhaust valve 12 is communicated with the hydraulic control valve 11, the hydraulic control valve 11 is controlled to be opened and closed through pressure, pressure is built on the upper portion of the pump after self-priming is completed, the hydraulic control valve on a flushing pipeline is in an open state under the action of the pressure, and the flushing function of the mechanical seal is achieved.

Because the upper end machine seal position of the vertical multi-stage pump is higher, a small amount of water in the pump cavity can not be effectively cooled to the upper end machine seal during self-priming, the machine seal is easy to damage, the machine seal oil filling channel 13 is formed in one side of the top end face of the machine seal flange 2, the bottom end of the machine seal oil filling channel 13 is connected to the outer side of the top friction part of the pump body 1 through an oil conveying pipe, about 20ml of lubricating oil can be added into the channel regularly for cooling the machine seal in the self-priming process, and the machine seal damage under the long-term self-priming working condition is avoided.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (5)

1. The utility model provides a water pump for carrying bilge oil sewage in under-deck of diving chamber, includes pump body (1), motor (14) and connects motor (14) and machine of pump body (1) to seal flange (2), its characterized in that: one side bottom of the pump body (1) is equipped with water inlet (3) to be equipped with delivery port (4) on pump body (1) top directly over water inlet (3), the inner chamber of the pump body (1) is provided with a plurality of groups and installs the impeller on motor (14) output shaft, wherein is located and forms gas-liquid separation chamber (9) between first impeller (5) and the adjacent impeller of below, and it has backward flow hole (6) to open on the first stator of first impeller (5), is provided with washing pipeline (10) in a side at pump body (1) water inlet (3) place dorsad, washing pipeline (10) are connected to the machine seal position of the pump body (1) lower extreme by the high-pressure area, and water pressure control valve (11) and discharge valve (12) are installed to the top of washing pipeline (10).

2. A pump for transporting bilge oil and water within a submersible tank as recited in claim 1, wherein: the end part of the water inlet (3) is provided with a first anti-rotation plate (7), the inner pipe of the gas-liquid separation cavity (9) and the output shaft of the motor (14) are symmetrically provided with two second anti-rotation plates (8), and the water inlet (3) and the water outlet (4) are respectively communicated with the upper end and the lower end of the inner cavity of the pump body (1).

3. A pump for transporting bilge oil and water within a submersible tank as recited in claim 1, wherein: the exhaust valve (12) is communicated with the upper end of the pump body (1), the bottom end of the exhaust valve (12) is communicated with the hydraulic control valve (11), and the opening and closing of the hydraulic control valve (11) are controlled through pressure.

4. A pump for transporting bilge oil and water within a submersible tank as recited in claim 1, wherein: an organic seal oiling channel (13) is formed in one side of the top end face of the mechanical seal flange (2), and the bottom end of the organic seal oiling channel (13) is connected to the outer side of the top friction position of the pump body (1) through an oil conveying pipe.

5. A pump for transporting bilge oil and water within a submersible tank as recited in claim 1, wherein: flange is installed to the tip of water inlet (3), just first prevent revolving plate (7) and install between flange and water inlet (3), the lateral wall at gas-liquid separation chamber (9) is fixed in second prevent revolving plate (8).

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