CN218199421U - LNG low-temperature tank molecular sieve filling structure - Google Patents

Abstract

The utility model relates to a LNG low-temperature tank molecular sieve filling structure, which comprises an inner tank and an outer tank, wherein the space between the inner tank and the outer tank is vacuum, a filling box is arranged on the outer wall of the inner tank, one side of the filling box, which is close to the inner wall of the outer tank, is provided with a feed inlet which protrudes outwards, and a silk screen for plugging filling material is arranged in the joint of the feed inlet and the filling box; the outer tank is provided with an explosion-proof opening; the sealing cover is covered on the feed port and is mutually and hermetically connected with the feed port; one side of the sealing cover close to the outer tank is provided with a connecting ring, the connecting ring is connected with a pull rope, and the pull rope extends out of an explosion-proof opening on the outer tank. The utility model discloses simple structure, convenient operation makes the molecular sieve obtain effectual protection in jar body assembling process, and does not influence simultaneously that jar body well molecular sieve exposes in the vacuum intermediate layer of the jar body yet.

Description

LNG low-temperature tank molecular sieve filling structure

Technical Field

The utility model relates to a LNG low temperature storage field especially relates to a LNG low temperature jar molecular sieve loads structure.

Background

The LNG storage tank comprises an inner tank and an outer tank, and an interlayer between the inner tank and the outer tank is a vacuum layer for heat insulation; in order to ensure the heat insulation effect of the vacuum layer for a long time, a low-temperature adsorbent (namely a 5A molecular sieve) is required to be placed in the interlayer, and the low-temperature adsorbent can absorb gas released from the surface of the tank body at low temperature; and when the low-temperature adsorbent is in an environment with moisture, the low-temperature adsorbent is easy to absorb the moisture.

The inner tank and the outer tank are generally connected through welding, the molecular sieve is required to be placed in before welding, the molecular sieve can absorb moisture, the molecular sieve is required to be exposed in an interlayer of the tank body to absorb gas released from the surface of the tank body, the whole assembly welding process of the tank body is large in workload, time consuming and long in time consuming, and the molecular sieve is prone to absorbing moisture and losing efficacy after being exposed in air for a long time. Therefore, it is an urgent problem to be solved by researchers to design a filling structure that the molecular sieve is not exposed to the air when the inner tank and the outer tank are welded and the molecular sieve is exposed to the interlayer after the welding is completed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a LNG low temperature jar molecular sieve loads structure, molecular sieve are at the inner tank with outer jar when welding, the molecular sieve is effectively protected, avoided molecular sieve and air contact to absorb moisture and become invalid.

The utility model provides a technical scheme that its technical problem adopted is: a molecular sieve filling structure of an LNG low-temperature tank comprises an inner tank and an outer tank, wherein the space between the inner tank and the outer tank is vacuum, a filling box is arranged on the outer wall of the inner tank, a feeding hole protruding outwards is formed in one side, close to the inner wall of the outer tank, of the filling box, and a silk screen for plugging filling materials is arranged in the joint of the feeding hole and the filling box; the outer tank is provided with an explosion-proof opening; the sealing cover is covered on the feeding hole and is in interaction sealing connection with the feeding hole; one side of the sealing cover, which is close to the outer tank, is provided with a connecting ring, the connecting ring is connected with a pull rope, and the pull rope extends out of an explosion-proof opening on the outer tank.

The utility model provides a theory of operation that its technical problem adopted is: a molecular sieve filling box is arranged between an inner tank and an outer tank of the low-temperature tank, a feed port is arranged on the filling box, the molecular sieve is filled into the filling box from the feed port, then a silk screen is arranged inside the feed port of the filling box to plug the molecular sieve in the filling box, the silk screen is plugged to prevent the molecular sieve from falling out of the filling box, and meanwhile, the branch sieve can be exposed in an interlayer of the tank body; then a sealing cover with a pull ring is adopted to cover the feed inlet, so that the molecular sieve is sealed in the filling box; tying a pull rope on a pull ring, pulling the pull rope out of an explosion-proof port on an outer tank before welding an inner tank and the outer tank, pulling the pull rope after the tank is welded to separate a sealing cover from a feed port, immediately pumping air in an interlayer of the tank by using a vacuum pumping device, wherein the molecular sieve takes a certain time to absorb moisture in the air, the sealing cover is immediately vacuumized after being opened, and then the explosion-proof hole is covered, and the moisture absorbed by the molecular sieve in the process is very little and can be ignored; after the sealing cover is opened, the interlayer is vacuumized, and the molecular sieve is exposed in the vacuum interlayer to absorb the gas released from the surface of the tank body.

The utility model discloses a show the effect and do:

1. the sealing cover enables the molecular sieve to be sealed in the filling box in the tank body assembling process, and the molecular sieve cannot be contacted with outside air to absorb moisture and lose efficacy.

2. The utility model discloses simple structure, convenient operation makes the molecular sieve obtain effectual protection in jar body assembling process, and does not influence simultaneously that jar body well molecular sieve exposes in the vacuum intermediate layer of the jar body yet.

Drawings

Fig. 1 is one of the schematic structural diagrams of the present invention.

Fig. 2 is a second schematic structural diagram of the present invention.

Fig. 3 is an enlarged view of a in fig. 2.

In the figure: the inner tank 1, the outer tank 2, the explosion-proof opening 21, the filling box 3, the feeding opening 31, the groove 32, the flanging 33, the silk screen 4, the sealing cover 5, the connecting ring 51, the bulge 52 and the pull rope 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the molecular sieve filling structure of the LNG cryogenic tank comprises an inner tank 1 and an outer tank 2, wherein a space between the inner tank 1 and the outer tank 2 is vacuum, a filling box 3 is arranged on the outer wall of the inner tank 1 and welded on the tank body of the inner tank 1, the periphery of the bottom of the box body is tightly attached and sealed with the outer wall of the inner tank 1, one side of the filling box 3, which is close to the inner wall of the outer tank 2, is provided with a feed port 31 protruding outwards, a wire mesh 4 for plugging a filling material is arranged in the joint of the feed port 31 and the filling box 3, and holes are formed in the wire mesh 4, and the size of each hole is smaller than that of a molecular sieve, so that the molecular sieve is plugged in the filling box 3 and can be in contact with the outside; the silk screen 4 can be fixed in the filling box 3 by welding, clamping and the like; the outer tank 2 is provided with an explosion-proof opening 21, the explosion-proof opening 21 is used for preventing the explosion of the tank body caused by overlarge pressure when gas in the tank body leaks, the explosion-proof opening 21 is sealed by a plug with a sealing gasket, and when the gas in the tank body leaks, the plug is extruded under certain pressure to reduce the pressure in the tank body, so that the explosion of the tank body is prevented; the feed inlet is characterized by further comprising a sealing cover 5 made of an elastic material, wherein the sealing cover 5 is covered on the feed inlet 31 and is in interaction sealing connection with the feed inlet 31 to achieve the sealing effect; a connecting ring 51 is arranged on one side of the sealing cover 5 close to the outer tank 2, a pull rope 6 is connected to the connecting ring 51, and the pull rope 6 extends out of the explosion-proof opening 21 on the outer tank 2. The sealing cover 5 made of elastic materials enables the deformation range of the sealing cover 5 to be larger, and the outer wall of the feed opening 31 can be tightly wrapped when the feed opening 31 is covered, so that the sealing performance of the filling box 3 is stronger; and the seal cap 5 is also easily detached when the pull cord 6 is pulled.

And when setting up, pack 3 sets up in the head department of inner tank 1 and outer jar 2, and here space is great, convenient operation.

A molecular sieve filling box 3 is arranged between an inner tank 1 and an outer tank 2 of a low-temperature tank, a feed port 31 is arranged on the filling box 3, a molecular sieve is filled into the filling box 3 from the feed port 31, and then a silk screen 4 is arranged inside the feed port 31 of the filling box 3 to seal the molecular sieve in the filling box 3, so that the molecular sieve cannot fall out of the filling box 3 due to the sealing of the silk screen 4, and meanwhile, the branch sieve can be exposed in an interlayer of the tank body; then, a sealing cover 5 with a pull ring is adopted to cover the feed port 31, so that the molecular sieve is sealed in the filling box 3; tying the pull rope 6 on the pull ring, pulling the pull rope 6 out of the explosion-proof port 21 on the outer tank 2 before the inner tank 1 and the outer tank 2 are welded, pulling the pull rope 6 after the tank body is welded to separate the sealing cover 5 from the feed port 31, immediately pumping air in an interlayer of the tank body by using a vacuumizing device, wherein a certain time is required for the molecular sieve to absorb moisture in the air, the sealing cover 5 is immediately vacuumized after being opened, and then the explosion-proof hole is covered, and the moisture absorbed by the molecular sieve in the process is very little and can be ignored; after the sealing cover 5 is opened, the interlayer is vacuumized, and the molecular sieve is exposed in the vacuum interlayer to absorb gas.

Further, a groove 32 is formed in the outer wall of the feed opening 31, a ring of protrusions 52 is formed in the inner wall of the sealing cover 5, and when the sealing cover 5 is located on the feed opening 31, the protrusions 52 are located in the groove 32 and are in close contact with each other. This results in a better seal of the sealing cap 5 against the outer wall of the feed opening 31.

Further, the cross section of the groove 32 is arc-shaped. Therefore, when the sealing cover 5 is pulled, the protrusion 52 can not be clamped in the groove 32, and the sealing cover 5 can be pulled away from the feed opening 31 more easily.

Furthermore, a flange 33 which is turned outwards is arranged at an opening of the feed port 31, the groove 32 is arranged on the flange 33, and the section of the turning part of the flange 33 is in the shape of a convex arc. The two positions of the turnover part and the bulge 52 are tightly sealed, so that the sealing performance of the sealing cover 5 and the feed opening 31 is stronger.

Further, the sealing cover 5 is made of rubber material, and the pull rope 6 is a steel wire rope. The rubber material has good elasticity, wide application and low cost and is easy to obtain; the pull rope 6 is made of stainless steel wire rope, so that the quality is good and the service life is long.

Further, the wire mesh 4 is a ten-mesh stainless steel wire mesh 4. The wire mesh 4 can be a ten-mesh or twenty-mesh stainless steel wire mesh 4, so that the molecular sieve can not be extruded, and the stainless steel has good quality and long service life.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only for the specific implementation method of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements and improvements made within the spirit of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. An LNG low-temperature tank molecular sieve filling structure comprises an inner tank (1) and an outer tank (2), and the space between the inner tank (1) and the outer tank (2) is vacuum, and is characterized in that a filling box (3) is arranged on the outer wall of the inner tank (1), one side, close to the inner wall of the outer tank (2), of the filling box (3) is provided with a feeding hole (31) protruding outwards, and a silk screen (4) for plugging filling material is arranged in the joint of the feeding hole (31) and the filling box (3); the outer tank (2) is provided with an explosion-proof opening (21);

the feed inlet is characterized by also comprising a sealing cover (5) made of an elastic material, wherein the sealing cover (5) covers the feed inlet (31) and is mutually and hermetically connected with the feed inlet (31); one side that sealed lid (5) are close to outer jar (2) is equipped with a go-between (51), connect a stay cord (6) on go-between (51), explosion-proof mouth (21) on outer jar (2) are followed in stay cord (6) stretch out.

2. The molecular sieve filling structure of the cryogenic tank as claimed in claim 1, wherein a groove (32) is formed on the outer wall of the feed port (31), a ring of protrusions (52) is formed on the inner wall of the sealing cover (5), and when the sealing cover (5) is placed on the feed port (31), the protrusions (52) are located in the groove (32) and are in close contact with each other.

3. The cryogenic tank molecular sieve packing structure of claim 2, wherein the grooves (32) are arcuate in cross-section.

4. The molecular sieve filling structure of the cryogenic tank according to claim 2 or 3, wherein a flange (33) which is turned outwards is arranged at an opening of the feed port (31), the groove (32) is arranged on the flange (33), and the cross section of the turning part of the flange (33) is in the shape of a convex circular arc.

5. The molecular sieve filling structure of the cryogenic tank as claimed in claim 1, 2 or 3, wherein the sealing cover (5) is made of rubber material and the pulling rope (6) is a steel wire rope.

6. The molecular sieve filling structure of the cryogenic tank as claimed in claim 4, wherein the sealing cover (5) is made of rubber material, and the pulling rope (6) is a steel wire rope.

7. The cryogenic tank molecular sieve packing structure of claim 1, 2, 3 or 6, wherein the wire mesh is a ten-mesh stainless steel wire mesh (4).

8. The molecular sieve packing structure of the cryogenic tank of claim 4, characterized in that the wire mesh (4) is a ten-mesh stainless steel wire mesh (4).

9. The cryogenic tank molecular sieve packing structure of claim 5, wherein the wire mesh (4) is a ten-mesh stainless steel wire mesh (4).

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