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Built-in bottom-valve-free LNG pump well structure

A bottomless valve, built-in technology, applied in the container filling method, container discharge method, gas/liquid distribution and storage, etc., can solve the problem that the submersible pump cannot close the storage tank and connect the pump well, and the bottom valve cannot be opened at any time Problems such as maintenance and replacement, inconvenient maintenance personnel safety, etc., to achieve the effect of increasing equipment safety, improving energy efficiency, and implementing easy installation

Active Publication Date: 2015-11-11
HOPE CLEAN ENERGY (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the design of the prior art facilitates the maintenance of the submersible pump, when the bottom valve fails, the connection between the storage tank and the pump well cannot be closed when the submersible pump is lifted, and the submersible pump cannot be repaired in time. If there is only one pump, the LNG in the storage tank can only be emptied, resulting in a lot of waste of LNG; the bottom valve cannot be repaired and replaced at any time; when repairing the bottom valve, the maintenance personnel need to go deep into the pump well, which is not only inconvenient And there is a greater threat to the safety of maintenance personnel

Method used

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  • Built-in bottom-valve-free LNG pump well structure
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 and figure 2 As shown, the structure of the built-in bottomless valve LNG pump well includes the pump well 1 arranged in the storage tank 2, the pump well 1 is provided with a submersible pump, the inner diameter of the pump well 1 matches the diameter of the submersible pump, and the submersible pump After being placed into the pump well, a liquid inlet chamber 5 is formed between the inlet end of the submersible pump and the bottom end of the pump well 1; the pump well 1 is provided with a number of pipelines 4 extending to the outside of the storage tank 2, and the number of pipelines 4 can be One, or two, or even more, one end of the pipeline 4 communicates with the liquid inlet chamber 5, and the other end of the pipeline 4 communicates from the outside of the storage tank 2 to the inside of the storage tank 2; the pipeline 4 is located outside the storage tank 2 A number of shut-off valves 3 are provided on the part, and the number of shut-off v...

Embodiment 2

[0033] Such as figure 1 and figure 2 As shown, the built-in bottomless valve LNG pump well structure, the bottom of the pump well 1 is a sealed structure, the pipeline 4 is connected to the liquid inlet chamber 5 on the bottom surface and / or side wall of the pump well 1, and the pipeline 4 can be connected to the liquid inlet chamber 5 from the pump well 1. The bottom enters and connects to the liquid inlet chamber 5, and can also be connected to the liquid inlet chamber 5 from the left or right side wall of the pump well 2, and the end of the pipeline 4 located outside the storage tank 2 is connected to the bottom surface of the storage tank 2; and / or the pipeline 4 One end located outside the storage tank 2 is connected to the side of the storage tank 2, the storage tank 2 is provided with an inner suction pipe connected to the pipeline 4, and the inner suction pipe extends to the inner bottom of the storage tank 2, and the pipeline 4 can be directly and / or indirectly It i...

Embodiment 3

[0035] Such as figure 1 and figure 2 As shown, the built-in bottomless valve LNG pump well structure, the bottom of the storage tank 2 is provided with a liquid accumulation pit 21, the LNG inside the storage tank 2 continuously flows to the liquid accumulation pit 21, and the bottom of the pump well 1 extends into the liquid accumulation pit 21, to ensure that the temperature remains constant and the temperature fluctuation range is minimal, the pipeline 4 is connected to the liquid accumulation pit 21 outside the storage tank 2, and at the same time, the bottom of the pump well extends into the liquid accumulation pit, which reduces the pipe length required for connecting the pipeline and saves materials .

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Abstract

The invention discloses a built-in bottom-valve-free LNG pump well structure, and belongs to the field of LNG pump wells. The built-in bottom-valve-free LNG pump well structure comprises a pump well arranged in a storage tank. An immersed pump is arranged in the pump well, and a liquid inlet cavity is formed between the inlet end of the immersed pump and the bottom end of the pump well. A plurality of pipelines stretching out of the storage tank are arranged on the pump well. One end of each pipeline is communicated with the liquid inlet cavity, and the other end of each pipeline is communicated with the interior of the storage tank from the exterior of the storage tank. A plurality of stop valves are arranged on the parts, located on the outer portion of the storage tank, of the pipelines. The built-in bottom-valve-free LNG pump well structure has the beneficial effects that the structure is simple, and implementation and mounting are easy and convenient; the immersed pump can be maintained at any time, and the valves for controlling communication between the storage tank and the pump well can be maintained at any time; and LNG waste is greatly reduced, and no threat to the safety of maintenance personnel exists.

Description

technical field [0001] The invention relates to an LNG pump well structure, in particular to a built-in bottomless valve LNG pump well structure. Background technique [0002] Large LNG storage tanks are generally built underground, and the connection between the storage tank and the external pipeline is higher than the liquid level. For such storage tanks, submersible pumps must be used when transporting LNG to the outside. The submersible pump is usually installed at the bottom of the storage tank. In order to facilitate the maintenance of the pump, the prior art is to set a standpipe for each pump, which is called "pump well". The submersible pump is installed at the bottom of the pump well, and the storage tank and the pump well are separated by a valve at the bottom, which is called "bottom valve". The base of the pump is located above the bottom valve. When the pump is installed on the base, the valve will be opened by the gravity of the pump, and the pump well will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C13/00
Inventor 江涛李凡吴卫东林晓辉郑跃华杨孟超
Owner HOPE CLEAN ENERGY (GRP) CO LTD
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