CN204879435U - Two -layer equation LNG pump well structure and contain storage tank of its structure - Google Patents
Two -layer equation LNG pump well structure and contain storage tank of its structure Download PDFInfo
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- CN204879435U CN204879435U CN201520648670.4U CN201520648670U CN204879435U CN 204879435 U CN204879435 U CN 204879435U CN 201520648670 U CN201520648670 U CN 201520648670U CN 204879435 U CN204879435 U CN 204879435U
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- pump
- well
- storage tank
- lng
- double layer
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Abstract
The utility model discloses a two -layer equation LNG pump well structure belongs to LNG pump well field. In including, ability utility model's LNG pump well structure establishes the pump well of immersed pump, the pump well includes nei jing and waijing, form the intermediate layer between nei jing and the outer well, interior well becomes the feed liquor chamber with the feed liquor end relief of immersed pump, interior well is equipped with a plurality of pipelines of wearing to go out the well, pipe connection feed liquor chamber, be equipped with a plurality of stop valves on the pipeline, the stop valve is located the intermediate layer. The utility model has the advantages of simple structure, implement the simple installation, not only can maintain the immersed pump at any time, also can maintain the valve that communicates between control storage tank and the pump well at any time, to reduce LNG extravagant by a wide margin, does not have the characteristics of threat to maintenance personal's safety.
Description
Technical field
The utility model relates to a kind of pump sump structure, particularly a kind of double layer LNG pump well construction.
Background technique
Large-scale LNG storage tank generally build underground in, and storage tank is higher than liquid level with the connection part of outside pipeline.For this storage tank, outwards during conveying LNG, immersed pump must be adopted.Immersed pump is arranged on the bottom of storage tank usually, and for the ease of maintenance pump, prior art is for each pump arranges a vertical tube, is referred to as " pump sump ".Immersed pump is arranged on the bottom of pump sump, and storage tank and pump sump are separated by one, bottom valve, are referred to as " bottom valve ".The base of pump is positioned at above bottom valve, and when pump is installed to after on base, rely on the Action of Gravity Field of pump by valve open, pump sump is communicated with LNG storage tank.If by pump take out maintenance, valve just loses pump Action of Gravity Field, in the active force and storage tank of spring static pressure acting in conjunction under, make valve closing, serve the effect isolated in storage tank space and pump sump space.
Although the design of prior art is convenient, immersed pump is keeped in repair, but when bottom valve fault, mention immersed pump and also cannot close being communicated with of storage tank and pump sump, on-call maintenance cannot be carried out to immersed pump, if be only provided with a pump in storage tank, so just can only be emptying by the LNG in storage tank, cause the waste of a large amount of LNG; Bottom valve also cannot carry out maintain and replace at any time; When keeping in repair bottom valve, maintenance man needs to be deep into pump sump inside, not only inconvenient but also larger to the security presence of maintenance man threat.
Model utility content
Goal of the invention of the present utility model is: for above-mentioned Problems existing, provides a kind of structure simple, implements simple installation; Can not only keep in repair immersed pump at any time, also can keep in repair with the valve be communicated with between pump sump control storage tank at any time; Significantly reduce LNG waste, to maintenance man's safety without the pump sump structure threatened.
The technical solution adopted in the utility model is as follows:
Double layer LNG pump well construction, establishes the pump sump of immersed pump in comprising, described pump sump comprises Nei Jing and Wai Jing, forms interlayer between described Nei Jing and outer well, and the liquid feeding end of described interior well and immersed pump forms admission chamber; Described interior well is provided with some pipelines passing outer well, and described pipeline connects admission chamber, and described pipeline is provided with some stop valves, and described stop valve is positioned at interlayer.
Owing to have employed said structure, control pump sump and move on to storage tank outside with the stop valve be communicated with between storage tank, when needs keep in repair immersed pump, close stop valve from outside and namely can disconnect being communicated with between pump sump with storage tank, now immersed pump is hung out well and can keep in repair immersed pump outward; Pump sump structure is simple, implements simply easy for installation, has the possibility that extremely strong practicability also reduces to cause operator security incident.
Double layer LNG pump well construction, be sealing configuration bottom described pump sump, described interior bottom is sealing configuration.
Owing to have employed said structure, what ensure that between pump sump and storage tank is isolated, avoid LNG from storage tank to pump sump seepage, reduce the waste of LNG.
Double layer LNG pump well construction, described stop valve comprises valve body and spool, is provided with spool in described valve body, and the valve rod that described spool and spool connect leads to pump sump top.
Owing to have employed said structure, the valve gap and the valve rod that control pump sump and the stop valve be communicated with between storage tank have extended to pump sump top, stop valve can operate from pump sump top, when needs keep in repair immersed pump, maintenance man is without the need at the bottom of lower going-into-well, namely being communicated with between pump sump with hydrops pond can be disconnected from the valve rod of peripheral operation stop valve, now immersed pump is hung out well to keep in repair immersed pump outward, pump sump structure is simple simultaneously, implement simply easy for installation, there is extremely strong practicability; Stop valve spool can be changed from top when stop valve needs repairing time, without the need to going deep into pump sump inside, convenient for maintaining, ensure that the safety of maintenance man.
Double layer LNG pump well construction, described interlayer top is sealing configuration, and described interlayer inside fills inert gas or is vacuum.
Owing to have employed said structure, inert gas has and stable not easily to react, the relative molecular mass being greater than air with relative molecular mass is greater than the physical property of the average molecular mass of air, normal pressure inert gas is filled between the interlayer that inwall and outer wall are formed, gas blanket can be formed in the middle of interlayer, a small amount of LNG can not only be prevented to be leaked in air environment, the safety of personnel is caused a hidden trouble, the steam in air can also be stoped, dust or particle etc. impact stop valve, reduce the possibility that stop valve stop valve breaks down, reduce maintenance frequency, add the life-span of stop valve, save cost, or pump sump is vacuum state, also can realize preventing a small amount of LNG to be leaked in air environment, the safety of personnel is caused a hidden trouble, the steam in air, dust or particle etc. can also be stoped to impact stop valve, reduce the possibility that stop valve stop valve breaks down.
Double layer LNG pump well construction, described pipeline is made up of stainless steel.
Owing to have employed said structure, extend the working life of pipeline, also ensure that from hydrops pond conveying LNG stablizing to pump sump.
A storage tank containing double layer LNG pump well construction, comprise above-mentioned double layer LNG pump well construction and storage tank, described pump sump is arranged at tank inside
.
Owing to have employed said structure, double layer LNG pump well can be placed in tank inside, and storage tank provides cryogenic temperature to pump sump, makes LNG in pump sump can not pneumatolytic metamorphism, and pump sump does not need to arrange separately the device, energy saving and the cost that keep constant temperature.Double layer LNG pump well construction is inserted in storage tank, also eliminates the setting of bottom valve in prior art, avoids when bottom valve fault, mentions immersed pump and also cannot close being communicated with of storage tank and pump sump, cannot carry out on-call maintenance, cause the waste of a large amount of LNG to immersed pump; It also avoid bottom valve and also cannot carry out maintain and replace at any time, the LNG in storage tank such as to only have use and just can to keep in repair afterwards, and the situation that a large amount of LNG also can be caused during this to waste occurs; Can not cause when keeping in repair bottom valve, maintenance man needs to be deep into pump sump inside, threat this problem larger to the security presence of maintenance man simultaneously.
A storage tank containing double layer LNG pump well construction, described tank bottom is provided with hydrops hole, and extend in hydrops hole bottom described pump sump, described pipeline passes interlayer and extends in hydrops hole.
Owing to have employed said structure, due to gravity, be LNG liquid in the hydrops hole of tank bottom, pump sump stretches in hydrops hole and ensures that temperature remains constant, and fluctuating range is minimum; Pipeline is connected to hydrops hole, ensure that the liquid entering pump sump in storage tank is LNG, and the BOG that storage tank upper strata can not be caused to exist sucks, and stretches in hydrops hole simultaneously, reduces the pipe range needed for connecting tube, save material bottom pump sump.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, structure is simple, implements simple installation, can not only keep in repair immersed pump at any time, also can keep in repair with the valve be communicated with between pump sump control storage tank at any time.
2, significantly reduce the waste to LNG in maintenance process and working procedure, reduce energy loss, saved cost.
3, at any time maintaining is carried out to stop valve, reduce the possibility that stop valve breaks down, increase device security, decrease maintenance expenses and maintain frequently, additionally providing the working environment of clean and safe.
Accompanying drawing explanation
Fig. 1 is the structural representation of double layer LNG pump well construction and the storage tank containing its structure.
Mark in figure: 1 is pump sump, and 11 is interior well, and 12 is outer well, and 13 is interlayer, and 2 is storage tank, 21 is hydrops hole, and 3 is stop valve, and 4 is pipeline, and 5 is admission chamber.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment 1
As shown in Figure 1, double layer LNG pump well construction, establishes the pump sump 1 of immersed pump in comprising, and it is outside that pump sump 1 can be placed in storage tank 2, also can be placed in storage tank 2 inner; Pump sump 1 comprises interior well 11 and outer well 12, and it is outside that outer well 12 is placed in interior well 11, forms interlayer 13 between interior well 11 and outer well 12, and interior well 11 forms admission chamber 5 with the liquid feeding end of immersed pump; Interior well 11 is provided with some pipelines 4 passing outer well 12, and one end of pipeline 4 connects admission chamber 5, and the other end of pipeline 4 is liquid feeding end; Pipeline 4 is provided with some stop valves 3, and the number of stop valve 3 can be 1, also can be 2, and even more, stop valve 3 is positioned at interlayer 13.When needs keep in repair immersed pump, close stop valve from outside and namely can disconnect being communicated with between pump sump with storage tank, now immersed pump is hung out well and can keep in repair immersed pump outward; Pump sump structure is simple, implements simply easy for installation, has the possibility that extremely strong practicability also reduces to cause operator security incident.This pump sump structure can be arranged on tank inside, also can be arranged on storage tank outside, and same structure has adaptability widely, can carry out unrestricted choice according to actual needs.
Interior well 11 is provided with two
extendthe pipeline 4 that direction is contrary, a pipeline 4 connects admission chamber 5 and passes outer well 11, be connected in storage tank, another root pipeline 4 connects admission chamber 5 in the opposite direction and passes outer well 11, be connected in storage tank, each root pipeline 4 is provided with a stop valve 3, when one of them stop valve breaks down time, close another stop valve, namely can the stop valve broken down be keeped in repair.Avoid after stop valve breaks down, being communicated with thus cannot keeping in repair stop valve between pump sump with hydrops pond cannot be cut off, the situation causing a large amount of LNG to waste occurs, also facilitate maintenance man to keep in repair, maintaining can also be carried out at any time to stop valve, reduce the possibility that stop valve breaks down; Pipeline 4 is made up of stainless steel.
Embodiment 2
As shown in Figure 1, double layer LNG pump well construction is sealing configuration bottom pump sump 1, is sealing configuration bottom interior well 11.Pipeline 4 can connect admission chamber 5 from the sidewall of interior well 11, also admission chamber 5 can be connected from bottom, but be sealing configuration bottom interior well 11, it is also sealing configuration bottom pump sump 1, when pump sump structure is positioned at tank inside, what ensure that between pump sump and storage tank is isolated, avoid LNG from storage tank to pump sump seepage, reduce the waste of LNG; When pump sump structure be positioned at storage tank outside time, avoid LNG from pump sump to External leakage, reduce the waste of LNG, also reduce the potential safety hazard of leaking and may cause.
Embodiment 3
As shown in Figure 1, double layer LNG pump well construction, stop valve 3 comprises valve body and spool, spool is provided with in valve body, the valve rod that spool and spool connect leads to pump sump 1 top, stop valve 3 can operate from pump sump top, when needs keep in repair immersed pump, maintenance man is without the need at the bottom of lower going-into-well, namely can disconnect being communicated with between pump sump with hydrops pond from the valve handle of peripheral operation stop valve, now immersed pump be hung out well and can keep in repair immersed pump outward, pump sump structure is simple simultaneously, implement simply easy for installation, there is extremely strong practicability; Stop valve spool can be changed from top when stop valve needs repairing time, without the need to going deep into pump sump inside, convenient for maintaining, ensure that the safety of maintenance man.
Embodiment 4
As shown in Figure 1, double layer LNG pump well construction, interlayer 13 top is sealing configuration, interlayer 13 inside fills inert gas, inert gas has and stable not easily to react, the relative molecular mass being greater than air with relative molecular mass is greater than the physical property of the average molecular mass of air, normal pressure inert gas is filled between the interlayer that inwall and outer wall are formed, gas blanket can be formed in the middle of interlayer, a small amount of LNG can not only be prevented to be leaked in air environment, the safety of personnel is caused a hidden trouble, the steam in air can also be stoped, dust or particle etc. impact stop valve, reduce the possibility that stop valve stop valve breaks down, reduce maintenance frequency, add the life-span of stop valve, save cost, inert gas can adopt nitrogen etc., or pump sump is vacuum state, also can realize preventing a small amount of LNG to be leaked in air environment, the safety of personnel is caused a hidden trouble, the steam in air, dust or particle etc. can also be stoped to impact stop valve, reduce the possibility that stop valve stop valve breaks down, adopt the conventional meanses well known by persons skilled in the art such as pearlife all can realize this purpose simultaneously.
Embodiment 5
As shown in Figure 1, a kind of storage tank containing double layer LNG pump well construction, comprises above-mentioned double layer LNG pump well construction and storage tank 2, and it is inner that pump sump 1 is arranged at storage tank 1
,storage tank 2 provides cryogenic temperature to pump sump 1, makes LNG in pump sump 1 can not pneumatolytic metamorphism, and pump sump 1 does not need to arrange separately the device, energy saving and the cost that keep constant temperature.Be provided with hydrops hole 21 bottom storage tank 2, extend in hydrops hole 21 bottom pump sump 1, pipeline 4 passes interlayer 13 and extends in hydrops hole 21, due to the reason of gravity, hydrops 21 bottom storage tank 2 is LNG liquid in cheating, and pump sump 1 stretches in hydrops hole 21 and ensures that temperature remains constant, and fluctuating range is minimum; Pipeline 4 is connected to hydrops hole 21, ensure that the liquid entering pump sump 1 in storage tank is LNG, and the BOG that storage tank 2 upper strata can not be caused to exist sucks, and stretches in hydrops hole simultaneously, reduces the pipe range needed for connecting tube 4, save material bottom pump sump 1.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. double layer LNG pump well construction, it is characterized in that: the pump sump (1) establishing immersed pump in comprising, described pump sump (1) comprises interior well (11) and outer well (12), form interlayer (13) between described interior well (11) and outer well (12), described interior well (11) forms admission chamber (5) with the liquid feeding end of immersed pump; Described interior well (11) is provided with some pipelines (4) passing outer well (12), and described pipeline (4) connects admission chamber (5), and described pipeline (4) is provided with some stop valves (3), and described stop valve (3) is positioned at interlayer (13).
2. double layer LNG pump well construction as claimed in claim 1, is characterized in that: described pump sump (1) bottom is sealing configuration, and described interior well (11) bottom is sealing configuration.
3. double layer LNG pump well construction as claimed in claim 1, is characterized in that: described stop valve (3) comprises valve body and spool, is provided with spool in described valve body, and the valve rod that described spool and spool connect leads to pump sump (1) top.
4. double layer LNG pump well construction as claimed in claim 1, is characterized in that: described interlayer (13) top is sealing configuration, and described interlayer (13) inside fills inert gas or is vacuum.
5. as the double layer LNG pump well construction in claim 1-4 as described in any one claim, it is characterized in that: described pipeline (4) is made up of stainless steel.
6. the storage tank containing double layer LNG pump well construction, is characterized in that: comprise above-mentioned double layer LNG pump well construction and storage tank (2), and it is inner that described pump sump (1) is arranged at storage tank (2), and described pipeline (4) is communicated with in storage tank (2)
.
7. a kind of storage tank containing double layer LNG pump well construction as claimed in claim 6, it is characterized in that: described storage tank (2) bottom is provided with hydrops hole (21), described pump sump (1) bottom extends in hydrops hole (21), and described pipeline (4) passes interlayer (13) and extends in hydrops hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520648670.4U CN204879435U (en) | 2015-08-26 | 2015-08-26 | Two -layer equation LNG pump well structure and contain storage tank of its structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520648670.4U CN204879435U (en) | 2015-08-26 | 2015-08-26 | Two -layer equation LNG pump well structure and contain storage tank of its structure |
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| Publication Number | Publication Date |
|---|---|
| CN204879435U true CN204879435U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520648670.4U Withdrawn - After Issue CN204879435U (en) | 2015-08-26 | 2015-08-26 | Two -layer equation LNG pump well structure and contain storage tank of its structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042329A (en) * | 2015-08-26 | 2015-11-11 | 成都华气厚普机电设备股份有限公司 | Double-layer type LNG pump well structure and storage tank comprising structure |
-
2015
- 2015-08-26 CN CN201520648670.4U patent/CN204879435U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042329A (en) * | 2015-08-26 | 2015-11-11 | 成都华气厚普机电设备股份有限公司 | Double-layer type LNG pump well structure and storage tank comprising structure |
| CN105042329B (en) * | 2015-08-26 | 2017-06-30 | 成都华气厚普机电设备股份有限公司 | Two-layer equation LNG pump well construction and the storage tank containing its structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151216 Effective date of abandoning: 20170630 |