LARGE-SCALE SUBMERSIBLE SEWAGE PUMP

• US 20140010683A1
• Filed: 11/15/2011
• Published: 01/09/2014
• Est. Priority Date: 03/31/2011
• Status: Active Grant

• Current Assignee: Ningbo Jushen Pumps Industry Co., Ltd.
• Original Assignee: Ningbo Jushen Pumps Industry Co., Ltd.
• Inventors: Zhai, Songmao, Li, Quanmin, Ying, Jianguo, Teng, Kangle, Lin, Zhilong, Jing, Jun
• Granted Patent: US 9,255,577 B2
• Time in Patent Office: Days
• US Class Current: 417/355
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 13/086 the pump and drive motor are both submerged
• CPC Class Codes: F04D 29/588 cooling or heating the machine F04D29/5886, F04D29/5893 take precedence
• CPC Class Codes: F04D 29/606 Mounting in cavities
• CPC Class Codes: F04D 29/607 means for positioning from outside

Abstract

Disclosed is a large-scale submersible sewage pump, comprising a pump and a pump seat installation structure, wherein the pump seat installation structure comprises a concrete installation base layer, and a pump seat for installing the pump. The pump seat is fixed to the pump installation layer, and the bottom of the pump is directly connected onto the pump seat. The pump comprises a motor cooling apparatus, wherein the cooling apparatus comprises an internal cooling apparatus installed inside the case of the motor, and an external cooling apparatus installed outside the motor. The pump seat installation structure can stably mount and support the large-scale submersible sewage pump, preventing potential safety hazard during running of the pump.

Claims

1. A large-scale submersible sewage pump, which includes a pump (1) and a pump installation structure;

said pump installation structure includes a pump installation layer (3) with the concrete foundation and a pump seat (2) for installing the pump (1), characterized in that;

said pump seat (2) is firmly coupled with the pump installation layer (3), and the bottom of said pump(1) is directly connected onto the pump seat (2);

said pump (1) includes a motor (1.2);

said motor (1.2) includes a stator (1.2.1), a rotor (1.2.2) and a shaft (1.2.3);

said stator (1.2.1), rotor (1.2.2) and shaft (1.2.3) are fixed within the case (1.2.12) of the motor(1.2);

an internal cooling apparatus circularly cooled by a first coolant is provided within the case (1.2.12) of said motor (1.2), and an external cooling apparatus circularly cooled by a second coolant is provided outside of said motor (1.2);

said internal cooling apparatus includes a motor cavity (1.2.4) which is also regarded as the cooling cavity and several cooling pipe (1.2.7) for the first coolant circularly passing, the passage of said cooling pipe (1.2.7) is communicated with the motor cavity (1.2.4) and the pipe body of said cooling pipe (1.2.7) is provided within the cooling cavity (1.2.11) of the external cooling apparatus.

2. A large-scale submersible sewage pump as claimed in claim 1, characterized in that:

the connection of the pump seat (2) with the pump installation layer (3) means that the pump installation structure also includes a steel plate I (3.1) pre-embedded in the pump installation layer (3), and a concrete enwrapping layer (3.2);

said pump seat (2) is connected with the steel plate I (3.1), and the connection and outside of the pump seat (2) is coated by the concrete enwrapping layer (3.2).

3. A large-scale submersible sewage pump as claimed in claims 2, characterized in that:

the connection of said pump seat (2) with the steel plate I (3.1) means that the connection includes a locating pin (3.3) and a briquetting (3.4);

said pump seat (2) is consisted of a base plate (2.1) and a surrounding wall (2.2);

said locating pin (3.3) is spliced in the base plate (2.1) of the pump seat (2), said briquetting (3.4) is of the converse L-shape, one end of the briquetting (3.4) is welded with the steel plate I (3.1) and the other end is welded with the locating pin (3.3).

4. A large-scale submersible sewage pump as claimed in claim 3, characterized in that:

the inlet end (1.1) of the pump is located within the surrounding wall (2.2), and the end face of the inlet end (1.1) is abutted with the upper surface of the base plate (2.1).

5. A large-scale submersible sewage pump as claimed in claim 1, characterized in that:

said internal cooling apparatus also includes an impeller (1.2.5);

said impeller (1.2.5) is fixed on the shaft (1.2.3) of the motor (1.2) and located under the rotor (1.2.2) and the stator (1.2.1) of the motor (1.2);

a spacer ring (1.2.6) is provided on the periphery of said impeller (1.2.5), and several through holes is provided on the wall of said spacer ring (1.2.6);

the upper end of said cooling pipe is communicated with the motor cavity (1.2.4) in the upper end of the stator (1.2.1) and the rotor (1.2.2), and the lower end of said cooling pipe (1.2.7) is communicated with the motor cavity (1.2.4) in the lower end of the stator (1.2.1) and the rotor (1.2.2) and the lower end of said cooling pipe (1.2.7) is located outside of the spacer ring(1.2.6).

6. A large-scale submersible sewage pump as claimed in claim 5, characterized in that:

said external cooling apparatus includes a cooling water jacket (1.2.8), an inlet pipe (1.2.9) and an outlet pipe (1.2.10);

said cooling water jacket (1.2.8) is provided outside of the case (1.2.12);

said inlet pipe (1.2.9) is inserted into and communicated with the cooling cavity (1.2.11) of said cooling water jacket (1.2.8), and the highest end of the inlet pipe (1.2.9) is bellow the lowest end of the stator (1.2.1) and the rotor (1.2.2);

said outlet pipe (1.2.10) is inserted into and communicated with the cooling cavity (1.2.11) of said cooling water jacket (1.2.8) and the highest end of said inlet pipe (1.2.9) is above the highest end of the stator (1.2.1) and the rotor (1.2.2).

7. A large-scale submersible sewage pump as claimed in claim 1, wherein:

further includes an installation guide device;

said installation guide device include two guide bars (6) which are used for sliding fitting with said pump (1) and guiding it when installing, and said two guide bars (6) are located on both symmetrical sides of the scroll case (1.3) of the pump (1), respectively.

8. A large-scale submersible sewage pump as claimed in claims 7, wherein:

a sipper (1.3.1) is provided on each of the symmetrical sides of said scroll case (1.3), each said slipper 1.3.1 has a groove (1.3.1.1) and said two guide bars (6) are sliding fitted with the grooves (1.3.1.1) of the slippers (1.3.1) on both sides of the scroll case (1.3), respectively.

9. A large-scale submersible sewage pump as claimed in claims 8, characterized in that:

said installation guide device further includes a steel plate II (3.5) pre-embedded in the pump installation layer (3), and the bottom of each said guide bar (6) is connected with the steel plate II (3.5).