CN214619005U - Pump storage device in LNG storage tank jar - Google Patents

Abstract

The utility model discloses a LNG storage tank internal pump storage device, including the container spare, the upper end of container spare is equipped with the opening, and is in the opening part is equipped with the apron, the apron can be opened or sealed lid is established the opening part of container spare, be equipped with the tubular interface of aerifing and the tubular interface of exhaust rather than inside intercommunication on the container spare respectively, it is equipped with first valve to aerify tubular interface, the tubular interface of exhaust is equipped with the second valve, and the LNG pump passes in and out through the opening part the container spare, aerify tubular interface be used for to add protective gas in the container spare, it is used for right to exhaust tubular interface carry out the evacuation in the container spare, its simple structure, and the gas tightness is good.

Description

Pump storage device in LNG storage tank jar

Technical Field

The utility model belongs to the liquefied natural gas field especially relates to a pump storage device in LNG storage tank.

Background

At present to LNG storage tank interior stand-by pump storage mode have more inconveniently, for making the tank interior pump can maintain equipment function well under the standby state, the external environment of minimize is to the influence of jar interior pump, this pump needs vertically to be placed to seal up with protective gas and deposit, be nitrogen gas usually, otherwise motor stator easily takes place the oxidation, and the pump body easily corrodes, influences equipment normal life. In order to achieve the storage condition of the in-tank pump, the whole in-tank pump is mainly sealed and packaged by adopting a thick plastic film at present, the top end of the in-tank pump is tied by a rope, and a protective gas pipeline is inserted, so that the sealing effect is limited. Because the monitoring protective gas pressure is inconvenient, only can continuously inwards fill micro-positive pressure by experience, in order to keep the stability of the vertical pump and prevent accidental knocking, the pump body is required to be arranged in a maintenance workshop, and is fixed on a lifting hook without stress by a lifting belt so as to prevent the pump body from toppling over under the accidental condition, otherwise, the pump body can only be horizontally arranged for the sake of safety, but the pump shaft is possibly deformed due to long-term horizontal arrangement, the performance of the pump is influenced, the use of a truss crane in the maintenance workshop is influenced to a certain extent, and the truss crane use management rule is not met.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a pump storage device in LNG storage tank of simple structure, and convenient to use, the monitoring atmospheric pressure of being convenient for simultaneously.

In order to achieve the above purpose, the technical solution of the present invention is as follows: the storage device comprises a container part, wherein an opening is formed in the upper end of the container part, a cover plate capable of being opened or closed in a sealing mode is arranged at the opening, an inflating pipe-shaped interface and an exhausting pipe-shaped interface which are communicated with the interior of the container part are arranged on the container part respectively, a first valve is arranged at the inflating pipe-shaped interface, a second valve is arranged at the exhausting pipe-shaped interface, an LNG pump enters and exits the container part through the opening, the inflating pipe-shaped interface is used for adding protective gas into the container part, and the exhausting pipe-shaped interface is used for emptying the interior of the container part.

The beneficial effects of the above technical scheme are that: the LNG storage tank internal pump is sealed and stored under the protection of protective gas, wherein the LNG storage tank internal pump can be stored for a long time under the condition of isolating oxygen, the gas-filled tubular interface is used for adding the protective gas into the container piece, the gas-exhausted tubular interface is used for emptying air in the container piece, and the first valve and the second valve can be closed quickly after the protective gas in the container piece is full of the protective gas.

In the technical scheme, the container part and the cover plate are both high-alloy steel members.

The beneficial effects of the above technical scheme are that: it has good pressure resistance and is not easy to rust.

In the technical scheme, the first valve and the second valve are needle valves.

The beneficial effects of the above technical scheme are that: it has good air tightness.

In the technical scheme, the container part is also provided with an air pressure measuring device for monitoring the air pressure in the container part.

The beneficial effects of the above technical scheme are that: therefore, the air pressure in the container piece can be conveniently known, and the air leakage defect of the container piece is avoided and the container piece is not easy to perceive.

In the above technical solution, the air pressure measuring device is disposed on the exhaust pipe shaped interface and located between the second valve and the container member.

The beneficial effects of the above technical scheme are that: this reduces the number of openings in the container member.

In the technical scheme, the air pressure measuring device is a pressure gauge.

The beneficial effects of the above technical scheme are that: the measurement accuracy is high.

In the technical scheme, the container part is in a groove body shape, the notch of the container part faces upwards to form an opening of the container part, and the inflation pipe-shaped interface and the exhaust pipe-shaped interface are both arranged on the side wall of the container part.

The beneficial effects of the above technical scheme are that: the structure is simple, and the stability is good.

According to the technical scheme, the flange ring is arranged at the opening edge of the container, the cover plate is a flange blind plate matched with the flange ring, a sealing gasket is arranged between the cover plate and the flange ring in a cushioning manner, and the cover plate and the flange ring are detachably connected in a sealing manner through a plurality of bolts and a plurality of nuts so as to seal and plug the opening of the container.

The beneficial effects of the above technical scheme are that: the connection is convenient, and the air tightness is good.

In the technical scheme, the middle part of the upper end of the cover plate is fixedly provided with a hanging ring.

The beneficial effects of the above technical scheme are that: so be convenient for utilize hoisting equipment such as purlin to hang to hoist the transfer with pump storage device in whole LNG storage tank.

In the technical scheme, the inner bottom wall of the container part is also provided with a layer of plastic backing plate.

The beneficial effects of the above technical scheme are that: so can avoid the contact of LNG storage tank inner pump and container spare inner bottom wall, be favorable to strengthening protecting LNG storage tank inner pump.

Drawings

Fig. 1 is a schematic structural diagram of a pump storage device in an LNG storage tank according to an embodiment of the present invention;

fig. 2 is another schematic diagram of the pump storage device in the LNG storage tank according to the embodiment of the present invention: 1 container part, 11 inflation pipe-shaped interfaces, 111 first valves, 12 exhaust pipe-shaped interfaces, 121 second valves, 13 air pressure measuring devices, 14 flange rings, 15 plastic cushion plates, 2 cover plates, 21 lifting rings and 3 sealing gaskets.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the embodiment provides an in-tank pump storage device for an LNG storage tank, which includes a container member 1, an opening is disposed at an upper end of the container member 1, a cover plate 2 capable of being opened or sealed and closed is disposed at the opening, an inflation pipe-shaped interface 11 and an exhaust pipe-shaped interface 12 are respectively disposed on the container member 1 and are communicated with the inside of the container member, a first valve 111 is disposed at the inflation pipe-shaped interface 11, a second valve 121 is disposed at the exhaust pipe-shaped interface 12, an LNG pump enters and exits the container member 1 through the opening, the inflation pipe-shaped interface 11 is used for adding a shielding gas into the container member 1, the exhaust pipe-shaped interface 12 is used for evacuating the inside of the container member 1, and the storage device is simple in structure and has good air tightness, and can seal and store the in-tank pump of the LNG storage tank under the protection of the shielding gas, wherein the long-term storage of the pump in the LNG storage tank under the condition that the pump is isolated from oxygen can be realized, the inflation pipe-shaped interface is used for adding protective gas into the container part, the exhaust pipe-shaped interface is used for exhausting air in the container part, and the first valve and the second valve can be closed quickly after the protective gas in the container part is filled.

Wherein, if the density of the adopted protective gas is greater than that of air, the communication part of the air exhaust pipe-shaped interface and the container part is positioned at the upper end of the side wall of the container part, so that the air in the container part is exhausted upwards, and at the moment, the communication part of the air inflation pipe-shaped interface and the container part is preferably positioned at the lower end of the side wall of the container part, as shown in detail in figure 1; if the density of the protective gas used is less than that of air, the connection between the venting pipe-shaped port and the container member is located at the lower end of the side wall of the container member, so that the air in the container member is discharged downwards, and in this case, the connection between the venting pipe-shaped port and the container member is preferably located at the upper end of the side wall of the container member, wherein the protective gas is preferably nitrogen (which has a density greater than that of air), but may of course be an inert gas or carbon dioxide, as shown in fig. 2.

In the technical scheme, the container member 1 and the cover plate 2 are both high-alloy steel members (preferably 06Cr19Ni10), and have the advantages of good pressure resistance, good corrosion resistance and difficult rusting.

In the above technical solution, the first valve 111 and the second valve 121 are both needle valves, and the air tightness is good.

In the technical scheme, the container part 1 is further provided with an air pressure measuring device 13 for monitoring the air pressure in the container part 1, so that the air pressure in the container part can be conveniently known, and the container part is prevented from being difficultly perceived due to the air leakage defect.

In the above technical solution, the air pressure measuring device 13 is disposed on the exhaust pipe interface 12 and between the second valve 121 and the container member 1, so as to reduce the number of openings on the container member.

In the above technical scheme, the air pressure measuring device 13 is a pressure gauge, and the measuring accuracy is high.

In the technical scheme, the container part 1 is in a groove body shape, the notch of the container part is upward and forms an opening of the container part, the inflation pipe-shaped interface 11 and the exhaust pipe-shaped interface 12 are both arranged on the side wall of the container part 1, and the container part is simple in structure and good in stability.

In the technical scheme, a flange ring 14 is arranged at the opening edge of the container member 1, the cover plate 2 is a flange blind plate matched with the flange ring 14, a sealing gasket 3 is arranged between the cover plate 2 and the flange ring 14 in a cushioning manner, and the cover plate 2 and the flange ring 14 are detachably and hermetically connected through a plurality of bolts and a plurality of nuts so as to seal and plug the opening of the container member 1.

In the technical scheme, the middle part of the upper end of the cover plate 2 is fixedly provided with a lifting ring 21, so that the whole LNG storage tank in-tank pump storage device is lifted and transferred by lifting equipment such as a truss crane.

In the above technical scheme, still be equipped with one deck plastic backing plate 15 on the interior diapire of container spare 1, so can avoid the contact of LNG storage tank internal pump and container spare inner bottom wall, be favorable to strengthening protecting LNG storage tank internal pump, wherein, preferably, plastic backing plate 15 is polytetrafluoroethylene material component, and its corrosion resisting property is good.

Preferably, the container member has a circular horizontal cross-section with a height of 3002mm, an inner diameter of 610mm and a wall thickness of 6 mm; the plastic backing plate (preferably circular) is 2-3mm thick and 580mm in diameter, and can play a role in shock absorption and protection when a pump in an LNG storage tank is hoisted into a container part; the cover plate and the flange ring can be connected through 24M 12 × 50 hexagon head bolts and 24 nuts matched with the same, preferably, the maximum pressure measuring range of the pressure gauge is preferably 0.4MPa, so that the internal pressure of the cylinder body can be conveniently monitored in real time, and the pressure of the protective gas in the pump storage device in the LNG storage tank can be generally kept at a micro positive pressure of 0.1-0.2MPa in daily use.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. The storage device of the pump in the LNG storage tank is characterized by comprising a container part (1), wherein an opening is formed in the upper end of the container part (1), a cover plate (2) capable of being opened or closed in a sealing mode is arranged at the opening, an inflation tubular interface (11) and an exhaust tubular interface (12) which are communicated with the interior of the container part are respectively arranged on the container part (1), a first valve (111) is arranged at the inflation tubular interface (11), a second valve (121) is arranged at the exhaust tubular interface (12), the LNG pump enters and exits the container part (1) through the opening, the inflation tubular interface (11) is used for adding protective gas into the container part (1), and the exhaust tubular interface (12) is used for emptying the interior of the container part (1).

2. The in-tank pump storage device for LNG storage tanks according to claim 1, characterized in that the vessel member (1) and the cover plate (2) are both high alloy steel members.

3. The LNG tank in-tank pump storage device of claim 1, wherein the first valve (111) and the second valve (121) are needle valves.

4. An LNG tank in-tank pump storage arrangement according to any of claims 1-3, characterized in that the container member (1) is further provided with a gas pressure measuring device (13) for monitoring the gas pressure inside the container member (1).

5. LNG tank in-tank pump storage according to claim 4, characterized in that the gas pressure measuring device (13) is arranged on the exhaust pipe interface (12) between the second valve (121) and the container member (1).

6. The LNG tank in-tank pump storage device of claim 5, characterized in that the gas pressure measuring device (13) is a pressure gauge.

7. The in-tank pump storage device for an LNG tank according to claim 6, characterized in that the container member (1) is trough-shaped with its notch facing upwards and constituting its opening, and the gas-filled pipe-shaped port (11) and the gas-discharge pipe-shaped port (12) are both provided on the side wall of the container member (1).

8. LNG tank in-tank pump storage device of claim 7, characterized in that the container (1) is provided with a flange ring (14) at its opening edge, the cover plate (2) is a flange blind plate matching with the flange ring (14), a sealing gasket (3) is arranged between the cover plate (2) and the flange ring (14), and the cover plate (2) and the flange ring (14) are detachably connected by a plurality of bolts and a plurality of nuts in a sealing manner to seal and close the opening of the container (1).

9. The storage device of claim 8, wherein a hanging ring (21) is fixed at the middle part of the upper end of the cover plate (2).

10. The in-tank pump storage device for LNG tanks according to claim 8, characterized in that the inner bottom wall of the container member (1) is further provided with a layer of plastic liner plate (15).

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