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Double layer lng pump well structure and storage tank containing it

A pump well, double-layer technology, applied in the field of double-layer LNG pump well structure, can solve the problems that the submersible pump cannot close the storage tank and connect with the pump well, the bottom valve cannot be repaired and replaced at any time, and it is inconvenient for the safety of maintenance personnel, etc. , to achieve the effect of convenient and simple installation, increase equipment safety, and easy installation

Active Publication Date: 2017-06-30
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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  • Double layer lng pump well structure and storage tank containing it

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Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the double-layer LNG pump well structure includes a pump well 1 with a submersible pump inside. The pump well 1 can be placed outside the storage tank 2 or inside the storage tank 2; the pump well 1 includes an inner well 11 and The outer well 12, the outer well 12 is placed outside the inner well 11, an interlayer 13 is formed between the inner well 11 and the outer well 12, and the inner well 11 and the liquid inlet end of the submersible pump form a liquid inlet chamber 5; the inner well 11 is provided with several The pipeline 4 passing through the outer well 12, one end of the pipeline 4 is connected to the liquid inlet chamber 5, and the other end of the pipeline 4 is the liquid inlet end; the pipeline 4 is provided with a plurality of shut-off valves 3, and the number of the shut-off valves 3 can be 1, There can also be 2, or even more, and the shut-off valve 3 is located in the interlayer 13 . When the submersible pump needs to be rep...

Embodiment 2

[0032] Such as figure 1 As shown, the double-layer LNG pump well structure, the bottom of the pump well 1 is a sealed structure, and the bottom of the inner well 11 is a sealed structure. The pipeline 4 can be connected to the liquid inlet chamber 5 from the side wall of the inner well 11, and can also be connected to the liquid inlet chamber 5 from the bottom, but the bottom of the inner well 11 is a sealed structure, and the bottom of the pump well 1 is also a sealed structure. When the pump well is inside the tank, it ensures the isolation between the pump well and the storage tank, avoids the leakage of LNG from the storage tank to the pump well, and reduces the waste of LNG; when the pump well structure is located outside the storage tank, it avoids the leakage of LNG from the pump Leakage from the inside of the well to the outside reduces the waste of LNG and the safety hazards that may be caused by leakage.

Embodiment 3

[0034] Such as figure 1 As shown, the double-layer LNG pump well structure, the shut-off valve 3 includes a valve body and a valve core. When the submersible pump needs to be repaired, the maintenance personnel do not need to go down to the bottom of the well, and the valve handle of the shut-off valve can be operated from the outside to disconnect the connection between the pump well and the effusion pool. At this time, the submersible pump The submersible pump can be repaired by hanging out of the well. At the same time, the structure of the pump well is simple, the installation is convenient and simple, and it has strong practicability; when the stop valve needs to be repaired, the spool of the stop valve can be replaced from the top without going deep into the pump well The interior is convenient for maintenance and ensures the safety of maintenance personnel.

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Abstract

The invention discloses a double-layer LNG pump well structure, which belongs to the field of LNG pump wells. The LNG pump well structure of the present invention includes a pump well with a submersible pump built in, the pump well includes an inner well and an outer well, an interlayer is formed between the inner well and the outer well, and the inlet of the inner well and the submersible pump The liquid end forms a liquid inlet chamber; the inner well is provided with several pipes passing through the outer well, and the pipes are connected to the liquid inlet chamber, and the pipes are provided with several shut-off valves, and the shut-off valves are located in the interlayer. The invention has the advantages of simple structure, easy implementation and installation; not only the submersible pump can be maintained at any time, but also the valve that controls the communication between the storage tank and the pump well can be maintained at any time; the waste of LNG is greatly reduced, and it is safe for maintenance personnel. characteristics of the threat.

Description

technical field [0001] The invention relates to a pump well structure, in particular to a double-layer 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 communicate with t...

Claims

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Application Information

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Patent Type & Authority Patents(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