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Vertical cryogenic tank submersible pump

A technology of cryogenic tanks and submersible pumps, applied in the field of submersible pumps, which can solve the problems of huge equipment, failure to achieve zero leakage, seal leakage, etc., and achieve good centering effect, space and cost saving, and good cooling effect

Active Publication Date: 2016-01-20
DALIAN DEEP BLUE PUMP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary vertical pumps, in order to prevent the medium in the pump from leaking out, all need to use dynamic seals to seal the shaft, which cannot achieve zero leakage, and there is a danger caused by seal leakage.
Vertical pumps with external motors need external cooling water or fans to cool them, and auxiliary cooling water or electric equipment need to be added, making the overall equipment huge, and its bearings often need to be lubricated by adding grease or lubricating oil

Method used

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  • Vertical cryogenic tank submersible pump
  • Vertical cryogenic tank submersible pump
  • Vertical cryogenic tank submersible pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A vertical submersible pump in a low-temperature tank, which includes a flow-passing component 3, a submersible motor 5, and a low-temperature cable 10, the submersible motor 5 is installed in the pump well, the submersible motor 5 is connected to a bearing, and the bearing connection is arranged in the flow-passing component 3 A guide wheel is provided between the submersible motor 5 and the pump well, the submersible motor 5 is suspended under the top plate 9 through a low-temperature steel wire rope 8, the submersible motor 5 is connected to a low-temperature cable 10, and the outflow end of the impeller 19 passes through an axial force balance device The gap of 4 communicates with the submersible motor 5 motor chamber, the submersible motor 5 motor chamber is provided with a balance circuit 14 inlet, the axial force balance device 4 is installed between the impeller 19 and the submersible motor 5, the submersible motor 5 and the submerged motor Pump coaxial.

[0021...

Embodiment 2

[0029] The basic structure of embodiment 2 is the same as that of embodiment 1, and this embodiment provides various devices to improve the working efficiency of the submersible pump.

[0030] Such as figure 2 As shown, the return pipeline of the balance circuit 14 is arranged outside the motor casing, or the flow return pipeline of the balance circuit 14 is arranged inside the motor casing, or placed on the hollow shaft. Various balancing circuits 14 can reduce the overall volume of the device and occupy less space.

[0031] The low-temperature cable 10 is connected to the power cable 12 on the atmospheric side through an electrical penetration joint 11 provided on the side of the top plate 9 . At the connection between the low-temperature cable inside the pump and the power cable 12 on the external atmosphere side, an electrical penetration sealing joint 11 is used. This joint adopts the gas sealing technology of metal and ceramic welding, metal and glass packaging, which ...

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Abstract

The invention relates to a submersible pump, in particular to a low-temperature submersible pump in a tank. A vertical submersible pump in a low-temperature tank, including a flow-passing part, a submersible motor, and a low-temperature cable. The submersible motor is installed in the pump well, and the submersible motor is connected to the bearing. There is a guide wheel between the pump wells, and the submersible motor is suspended under the roof through a low-temperature steel wire rope. The submersible motor is connected to a low-temperature cable. There is a balance circuit inlet in the motor motor room. In this patent, the pump body is designed in the pump well, and the submersible motor is directly connected to the impeller through the bearing, so that the centering effect is better, and the conveyed liquid flows into the cavity of the submersible motor through the axial force balance device, and no additional adjustment of the pump is required. The motor provides heat dissipation for better cooling, saving space and cost.

Description

technical field [0001] The invention relates to a submersible pump, in particular to a low-temperature submersible pump in a tank. Background technique [0002] At present, LNG receiving stations, liquefaction plants, alkanes, and hydrocarbon projects need to use low-temperature pumps for low-temperature medium transportation, loading and unloading, etc., because the medium is low-temperature, flammable, explosive and easy to vaporize. The conditions were harsh. Therefore, the pump equipment for transporting such media is required to have the characteristics of reliable sealing, small loss of operating liquid, and safe, stable and reliable structure. Due to the difficulty in design, manufacturing and testing, at present, domestic submersible pumps of this kind in cryogenic tanks all rely on imports, and are in a state of foreign technology monopoly. As a result, problems such as high product prices and insufficient technical support arise. [0003] The localization of subm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/08
Inventor 万学丽韩传宝陈跃张磊仲丽丽
Owner DALIAN DEEP BLUE PUMP CO LTD