CN212838404U

CN212838404U - Submersible hot water sewage pump

Info

Publication number: CN212838404U
Application number: CN202021404649.7U
Authority: CN
Inventors: 张玉新; 李威; 万彬
Original assignee: Shanghai Yuke Environmental Engineering Co ltd
Current assignee: Shanghai Yuke Environmental Engineering Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-03-30
Anticipated expiration: 2030-07-16

Abstract

The utility model provides a submersible hot water sewage pump, which comprises a motor, a pump cover and a pump body, wherein the motor comprises a motor shell, a motor shaft, a motor rotor and a motor stator which are positioned in a vacuumized motor cavity in the motor shell; a vacuum-pumping cavity is formed between the pump cover and the motor shell; the pump body is internally provided with an impeller which is arranged on the tail end of the motor shaft and is provided with a lower water inlet and a side water outlet; mechanical seals sleeved on a motor shaft are arranged above and below the pump cover, a first vacuumizing interface communicated with a vacuumizing motor cavity is arranged on the motor shell, and a first ball valve is arranged on the first vacuumizing interface; and a second vacuumizing interface communicated with the vacuumizing cavity is arranged on the pump cover or the lower end cover, and a second ball valve is arranged on the second vacuumizing interface. The utility model discloses a guarantee the vacuum in the motor cavity of evacuation and the vacuous cavity of evacuation and adopt high temperature resistant cable and high temperature resistant cable sealing member, ensure safe, the steady operation in the medium below 100 ℃.

Description

Submersible hot water sewage pump

The technical field is as follows:

the utility model relates to a water pump field especially relates to a immersible pump.

Background art:

at present, the allowable medium temperature of the submersible pump is generally within 40 ℃, and some submersible pumps capable of being applied to the medium with the temperature of 100 ℃ are generally small in size and have the power not exceeding 30 kW. The high-power submersible pump on the market can not be applied to high-temperature media, and the reasons are as follows:

1) the medium temperature is higher and can be transmitted to the stator of the submersible motor, a very small running clearance is arranged between the stator and the rotor, the temperature of the stator is quickly transmitted to the rotor along with the rise of the temperature, and the lower end of the rotor is provided with parts such as a bearing, a mechanical seal and the like, and the service life of the parts is sharply reduced due to the rise of the temperature;

2) the cable and cable seal of the motor are difficult to be used stably and safely in high-temperature media.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defects, the utility model provides a submersible hot water sewage pump which can be applied to hot water with higher temperature.

In order to achieve the above object, the utility model provides a submersible hot water sewage pump, it includes:

the motor comprises a motor shell, a motor shaft, a motor rotor and a motor stator, wherein the motor stator and the motor rotor are positioned in a motor cavity which is vacuumized in the motor shell;

the pump cover is connected with the motor shell, and a vacuumized cavity is formed between the pump cover and the motor shell;

the pump body, its content has impellers, the impeller is installed on motor shaft end, the pump body also has lower water inlet and side water outlet;

mechanical seals sleeved on a motor shaft are arranged above and below the pump cover, a first vacuumizing interface communicated with a vacuumizing motor cavity is arranged on the motor shell, and a first ball valve is arranged on the first vacuumizing interface; and a second vacuumizing interface communicated with the vacuumizing cavity is arranged on the pump cover or the lower end cover, and a second ball valve is arranged on the second vacuumizing interface.

Further, the motor casing comprises shell, upper end cover and lower end cover, and the pump cover is connected with this lower end cover, and the cavity of evacuation is formed between pump cover and this lower end cover, and first evacuation interface sets up on this shell.

Still further, the first ball valve is set to be suitable for additionally connecting a first vacuumizing pipeline when a vacuumized motor cavity needs to be vacuumized, and the first vacuumizing pipeline is provided with a first vacuum meter and a vacuum pump; the second ball valve is set to be suitable for being additionally connected with a second vacuum-pumping pipeline when the vacuum-pumping cavity needs to be vacuumized, and a second vacuum meter is arranged on the second vacuum-pumping pipeline and is connected to the vacuum pump.

Still further, the upper end cover is provided with a high temperature resistant cable and a high temperature resistant cable sealing element.

And in addition, bearings are arranged between the upper end cover and the motor shaft, and between the lower end cover and the motor shaft.

Further, the mechanical seal is a high temperature resistant mechanical seal.

Compared with the prior art, the utility model has the following advantages:

1) by means of the first vacuumizing interface and the second vacuumizing interface, the vacuumizing motor cavity and the vacuumizing cavity can be in a vacuum state, so that heat in a medium is reduced and transferred to a motor rotor through a motor stator, and the rapid reduction of the service life of a bearing, a mechanical seal and other parts due to the increase of temperature is avoided;

2) the high-temperature-resistant cable and the high-temperature-resistant cable sealing element are adopted, so that the utility model can be ensured to safely and stably operate in a medium below 100 ℃;

3) adopt high temperature resistant mechanical seal to further guarantee the utility model discloses a high temperature resistance can.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

Description of the drawings:

the structure of the present invention, together with further objects and advantages thereof, will be best understood from the following description taken in conjunction with the accompanying drawings, in which like reference characters identify like elements:

fig. 1 is a schematic structural view of a submersible hot water sewage pump according to an embodiment of the present invention.

The specific implementation mode is as follows:

the following description of the embodiments of the present invention will be made with reference to the accompanying drawings. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner, including employing various features disclosed herein in connection with which such features may not be explicitly disclosed.

As shown in fig. 1, the submersible hot water sewage pump according to an embodiment of the present invention includes a motor 1, a pump cover 3, and a pump body 5. As shown in fig. 1, the motor 1 includes a motor housing formed by a casing 10, an upper end cover 12 and a lower end cover 14, a motor shaft 13 rotatably fixed to the upper end cover 12 and the lower end cover 14 through a bearing 11, and a motor rotor 16 and a motor stator 18 located in a motor cavity 15 evacuated in the motor housing; the pump cover 3 is connected with the lower end cover 14, and a vacuumized cavity 17 is formed between the pump cover 3 and the lower end cover 14; the pump body 5 contains an impeller 7, the impeller 7 is mounted on the end of the motor shaft 13, and the pump body 5 is further provided with a lower water inlet 51 and a side water outlet 53.

As shown in fig. 1, the high temperature resistant mechanical seal 2 sleeved on the motor shaft 13 is arranged above and below the pump cover 3, and the housing 10 is provided with a first vacuum port 41 communicated with the vacuum-pumping motor cavity 15, and the first vacuum port 41 is provided with a first ball valve 43; the lower end cap 14 (in another embodiment, the pump cap 3 may also be used) is provided with a second evacuation port 42 communicating with the evacuated cavity 17, and a second ball valve 44 is attached to the second evacuation port 42. In the present embodiment, the first ball valve 43 is configured to be suitable for additionally connecting a first vacuum pipeline 45 when the vacuum-pumping motor cavity 15 needs to be pumped, and a first vacuum gauge 47 and a vacuum pump 49 are arranged on the first vacuum pipeline 45; the second ball valve 44 is arranged to be adapted to additionally connect a second evacuation line 46 when evacuation of the evacuated cavity 17 is required, the second evacuation line 46 being arranged on a second vacuum gauge 48 and connected to a vacuum pump 49.

As shown in fig. 1, the upper end cover 12 is provided with a high temperature resistant cable 61 and a high temperature resistant cable sealing member 63, so as to ensure the safe and stable operation of the water pump in a medium below 100 ℃.

The process of evacuation is described below with reference to fig. 1:

as shown in fig. 1, after the submersible hot water sewage pump of the present embodiment is assembled, a first vacuum port 41 which is reserved on the housing 10 of the motor 1 and is communicated with the vacuum-pumping motor cavity 15 is connected with a first ball valve 43, and is connected with a first vacuum-pumping pipeline 45 and a first vacuum gauge 47 and a vacuum pump 49 which are arranged on the first vacuum-pumping pipeline 45; a second ball valve 44 is connected through a second vacuum port 42 reserved on the lower end cover 14 and communicated with the vacuum cavity 17, and a second vacuum pipeline 46, a second vacuum gauge 48 arranged on the second vacuum port and finally a vacuum pump 49 are connected. When the vacuum pump 49 is used for vacuumizing the vacuumized motor cavity 15, the first ball valve 43 is opened, and the second ball valve 44 is closed; when the evacuated cavity 17 is evacuated by the vacuum pump 49, the second ball valve 44 is opened and the first ball valve 43 is closed. It should be noted that, the vacuumed motor cavity 15 and the vacuumed cavity 17 have different vacuum degrees that need to be achieved according to different use conditions and medium temperatures, and the vacuum degree, that is, a calculated value of the vacuum degree, needs to be calculated and determined according to actual conditions.

When the calculated value of the vacuum degree is obtained by vacuum pumping of the cavity, the valves of the two ball valves are closed, and the air tightness is checked. And after the air tightness is qualified, immediately removing the pipeline, the vacuum meter and the vacuum pump behind the two ball valves, namely removing the first vacuum-pumping pipeline 45, the first vacuum meter 47 and the vacuum pump 49 arranged on the first vacuum-pumping pipeline, and removing the second vacuum-pumping pipeline 46 and the second vacuum meter 48 arranged on the second vacuum-pumping pipeline. The submersible hot water sewage pump can be hung into a sewage pool for use, the submersible hot water sewage pump only needs to be hung out of the water surface regularly to check the vacuum degree of the two chambers, and when the vacuum degree is lower than the designed minimum vacuum value, the submersible hot water sewage pump needs to be vacuumized again to reach the calculated value of the vacuum degree.

While the invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the above-described arrangements, including combinations of features disclosed herein either individually or in any combination as is evident from the below disclosure. These variants and/or combinations fall within the technical field of the present invention and are intended to be protected by the following claims.

Claims

1. A submersible hot water sewage pump, characterized by comprising:

2. The submersible hot water sewage pump of claim 1 wherein the motor housing is comprised of an outer shell, an upper end cap and a lower end cap, the pump cap being attached to the lower end cap, the evacuated cavity being formed between the pump cap and the lower end cap, the first evacuation port being disposed on the outer shell.

3. The submersible hot water sewage pump of claim 2, wherein the first ball valve is configured and adapted to be additionally connected with a first vacuum line provided with a first vacuum gauge and a vacuum pump when the evacuated motor cavity needs to be evacuated; the second ball valve is arranged to be suitable for being additionally connected with a second vacuum pumping pipeline when the vacuum pumping cavity needs to be pumped, and a second vacuum meter is arranged on the second vacuum pumping pipeline and connected to the vacuum pump.

4. A submersible hot water sewage pump according to claim 2 or 3, wherein the upper end cap is provided with a high temperature resistant cable and a high temperature resistant cable seal.

5. The submersible hot water sewage pump of claim 2 wherein bearings are provided between the motor shaft and both the upper and lower end caps.

6. The submersible hot water sewage pump of claim 1 wherein the mechanical seal is a high temperature resistant mechanical seal.