CN114135785B

CN114135785B - Dual leakage-proof liquefied gas tank

Info

Publication number: CN114135785B
Application number: CN202111465667.5A
Authority: CN
Inventors: 周杨
Original assignee: PUYANG HAILIN SPECIAL EQUIPMENT MANUFACTURING PROTECTION CO LTD
Current assignee: PUYANG HAILIN SPECIAL EQUIPMENT MANUFACTURING PROTECTION CO LTD
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2023-01-06
Anticipated expiration: 2041-12-02
Also published as: CN114135785A

Abstract

The invention belongs to the safety field of liquefied gas tanks, and particularly relates to a double leakage-proof liquefied gas tank which comprises a valve, wherein the valve is used for controlling the speed of inlet and outlet of liquefied gas, an air outlet pipe is connected below the valve, a liquefied gas meter is arranged on the air outlet pipe and used for detecting the amount of the inlet and outlet of the liquefied gas and the content, pressure and temperature of residual liquefied gas in the liquefied gas tank, and the air outlet pipe is connected to a re-tank body. The multi-layer tank inner space and the double-layer tank shell are arranged, so that the multi-layer tank inner space is isolated from each other, the next layer can not be opened for continuous use until liquefied gas in the upper layer is completely gasified, purified water is used as a medium between the double-layer tank shell, a certain part of the tank body cannot be leaked into air when being damaged under the action of the annular floating plate and the inner channel of the tank shell, and the purified water is used as the medium between the double-layer tank shell, so that the liquefied gas in the tank body can be effectively buffered when collision occurs.

Description

Dual leakage-proof liquefied gas tank

Technical Field

The invention belongs to the safety field of liquefied gas tanks, and particularly relates to a double leakage-proof liquefied gas tank.

Background

The liquefied petroleum gas is a colorless volatile liquid obtained by pressurizing, cooling and liquefying natural gas or petroleum in an oil refinery. It is extremely spontaneous combustion, and when its content in air reaches a certain concentration range, it can explode when exposed to open fire. The liquefied petroleum gas is used as fuel, and has high heat value, no smoke dust and carbon residue, and convenient operation and use, and has widely entered the living field of people. The bottled supply is to distribute liquefied petroleum gas from a storage station to each household through a sealed steel cylinder as the gas supply source of the household kitchen range. Liquefied petroleum gas is a toxic gas, but the volatilization of the toxicity is conditional. The liquefied petroleum gas is volatilized to cause the toxicity of the reaction of human body only when the concentration of the liquefied petroleum gas in the air exceeds 10 percent. When the human body is exposed to the toxicity, the symptoms of vomiting, nausea and even coma can occur, and great harm is brought to the human body. Lpg gas is also very prone to drool which may occur from the reservoir in the event of a leak. In general, 1 liter of liquefied petroleum gas is volatilized into about 350 liters of gas after flowing out, and the gas can be combusted when meeting electricity, so that a serious fire disaster is caused; the mechanical impact damages the container, and the pressure in the tank is reduced instantaneously to cause steam explosion. The risks of mechanical collisions are mainly from derailing and overturning of the lpg tanker during transportation, collisions of the tanker during transportation, and impacts of surrounding objects (such as cranes and the like) on the vessel. In the prior art, no liquefied gas tank can achieve double leakage prevention and can effectively buffer the liquefied gas inside when mechanical collision occurs.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a double leakage-proof liquefied gas tank, so that the inner spaces of a plurality of layers of tanks are isolated from each other, the next layer of tanks can be opened for continuous use until liquefied gas in the previous layer of tanks is completely gasified, purified water is used as a medium between double-layer tank shells, a certain part of the tank body cannot be leaked into the air when being damaged under the action of an annular floating plate and a channel in the tank shell, and the liquefied gas in the double-layer tank shells can be effectively buffered when collision occurs due to the fact that the purified water is used as the medium between the double-layer tank shells.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a dual liquefied gas storage tank of preventing revealing, includes the valve, the valve is used for controlling the speed of business turn over liquefied gas, the below of valve is connected with the outlet duct, be provided with the liquefied gas table on the outlet duct for detect business turn over how much of liquefied gas and the content, pressure and the temperature of remaining liquefied gas in the liquefied gas storage tank, the outlet duct is connected on the jar body again.

Preferably, the internal multilayer structure that is divided into of jar, wherein the jar body of the lower layer divide into outer shell and inlayer shell, be connected by first annular stopper between outer shell and the inlayer shell, be equipped with second confined space between outer shell and the inlayer shell, the pure water has been stored in the second confined space, centers on the surface of water of pure water inlayer shell floats there is an annular kickboard, be located above the second confined space first annular stopper is close to outer shell position is equipped with one-way ventilation mechanism, be equipped with first confined space in the inlayer shell, liquefied gas is put to first confined space, first confined space top is equipped with first movable tank bottoms, each is equipped with a plurality of small circle awl recesses according to certain law from top to bottom in first movable tank bottoms, first movable tank bottoms is located first annular stopper top, first annular stopper top is connected with a plurality of small circle awl lugs according to certain law, small circle awl lug with small circle awl recess one-to-one.

Preferably, the annular floating plate comprises an inner annular plate and an outer annular plate, the inner annular plate is in close contact with the inner tank shell, the outer annular plate is in close contact with the outer tank shell, the middle of the outer annular plate is connected with the outer tank shell through a connecting block, an annular groove is arranged below the middle part of the connecting block, first through holes are formed in the annular groove at intervals, third sealed spaces are respectively formed in the annular floating plate and located on two sides of the annular groove, and air is filled in the third sealed spaces.

Preferably, the one-way ventilation mechanism is located in the first annular limiting block and comprises an air outlet, a first pipeline is connected to the upper portion of the air outlet, a one-way ventilation block is arranged at the position, connected with the air outlet, of the first pipeline, a plurality of second through holes are formed in the one-way ventilation block, one end of each second through hole is connected with the first pipeline, the other end of each second through hole is blocked by an outer-layer tank shell beside the air outlet, and a spring is connected to the upper portion of the one-way ventilation block and located in the first pipeline.

Preferably, the tank body is of a multi-layer structure, the tank body in the middle layer is divided into an outer layer tank shell and a first movable inner layer tank shell, a third pipeline is arranged in the middle of the outer layer tank shell, one-way ventilation mechanism is communicated to the third pipeline through a sixth through hole, the first movable inner layer tank shell is connected with the bottom of the first movable tank, a plurality of small cone grooves are respectively arranged on the upper part and the lower part of the bottom of the first movable tank according to a certain rule, a second annular limiting block is arranged above the bottom of the first movable tank, a plurality of small cone convex blocks are connected below the second annular limiting block according to a certain rule and correspond to the small cone grooves one by one, the outer layer tank shell is connected with the first movable inner layer tank shell through a second annular limiting block and a third annular limiting block, and a fourth sealing space is arranged between the outer layer tank shell and the first movable inner layer tank shell, the fourth sealed space is internally stored with purified water, the purified water floats on the water surface around the first movable inner tank shell, a second pipeline is arranged in the fourth sealed space according to a certain rule, a third through hole is arranged in each second pipeline, one end of each third through hole penetrates through the second annular limiting block, the second pipeline penetrates through a part of first through holes of the annular floating plate, a one-way ventilation mechanism is respectively arranged at the position, close to the outer tank shell, in the third annular limiting block above the fourth sealed space and at the other end of each third through hole, a fifth sealed space is arranged in the first movable inner tank shell, liquefied gas is stored in the fifth sealed space, a second movable tank bottom is arranged above the fifth sealed space, and a plurality of small cone grooves are respectively arranged at the upper part and the lower part of the second movable tank bottom according to a certain rule, the second movable tank bottom is located third annular stopper top, third annular stopper top is connected with a plurality of small cone lugs according to certain law, small cone lug with small cone recess one-to-one, be connected to the fourth through-hole behind the one-way ventilation mechanism of third through-hole connection, the fourth through-hole communicates with the fifth through-hole again, the fifth through-hole is located first movable inlayer tank shell upside position.

Preferably, the tank body is internally divided into a multilayer structure, the tank body on the uppermost layer is divided into an outer tank shell and a second movable inner tank shell, the second movable inner tank shell is connected with the second movable tank bottom, a fourth annular limiting block is arranged above the second movable tank bottom, a plurality of small cone convex blocks are connected below the fourth annular limiting block according to a certain rule, the small cone convex blocks correspond to the small cone grooves one to one, the outer tank shell is connected with the second movable inner tank shell through the fourth annular limiting block and a fifth annular limiting block, a sealing space is arranged between the outer tank shell and the second movable inner tank shell, the sealing space is the same as the fourth sealing space, the sealing space is located above the fifth annular limiting block, the other end of the third through hole is provided with an one-way movable ventilation mechanism, a sixth sealing space is arranged in the second inner tank shell, liquefied gas is stored in the sixth sealing space, the third pipeline is communicated with the third through hole, and a fourth pipeline is connected to the upper portion of the sixth sealing space.

Has the advantages that:

1. the multilayer tank inner space and the double-layer tank shell are arranged, so that the effect of mutual isolation of the multilayer tank inner spaces is realized, and the next layer can be opened for continuous use until liquefied gas in the upper layer is completely gasified;

2. according to the invention, pure water is used as a medium between the double-layer tank shells, and a large amount of water cannot leak into the air when a certain position of the tank body is damaged under the action of the annular floating plate and the channel in the tank shell;

3. according to the invention, purified water is used as a medium between the double-layer tank shells, so that the liquefied gas in the double-layer tank shell can be effectively buffered when collision occurs.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 2;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 3;

FIG. 6 is an enlarged view at C;

fig. 7 is an enlarged view at D.

In the figure, a valve 1, a liquefied gas meter 2, an air outlet pipe 3, a fourth pipeline 301, a tank body 4, an outer layer tank shell 401, a first sealed space 402, an inner layer tank shell 403, a second sealed space 404, an annular floating plate 405, a third pipeline 406, a second pipeline 407, a fifth sealed space 408, a sixth sealed space 409, an annular groove 410, a third sealed space 411, an air outlet hole 412, a one-way vent block 413, a second through hole 414, a small cone bump 415, a small cone groove 416, a spring 417, a fourth through hole 418, a third through hole 419, a sixth through hole 420, a first pipeline 421, a connecting block 422, a first movable inner layer tank shell 423, a fifth through hole 424, an outer ring plate 425, an inner ring plate 426, a first through hole 427, a first annular limiting block 428, a first movable tank bottom 429, a second annular limiting block 430, a fourth sealed space 431, a third annular limiting block 432, a second movable tank bottom 433, a second movable inner layer tank shell 434, a fourth annular limiting block 436, a fifth annular limiting block 437, a seventh through hole 437, a seventh limiting block 430, a fourth limiting block 435, a seventh limiting block 436, a seventh limiting block 437, a seventh limiting block

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

In the description of the present invention, it should be noted that the terms "inside", "below", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

With reference to fig. 1-7, a dual leakage-proof liquefied gas tank comprises a valve 1, wherein the valve 1 is used for controlling the speed of inlet and outlet of liquefied gas, an outlet pipe 3 is connected below the valve 1, a liquefied gas meter 2 is arranged on the outlet pipe 3 and used for detecting the amount of the inlet and outlet of the liquefied gas and the content, pressure and temperature of residual liquefied gas in the liquefied gas tank, and the outlet pipe 3 is connected to a tank body 4.

Further, the interior of the tank body 4 is of a multi-layer structure, wherein the tank body 4 at the lowest layer is divided into an outer layer tank shell 401 and an inner layer tank shell 403, the outer layer tank shell 401 is connected with the inner layer tank shell 403 through a first annular limiting block 428, a second sealed space 404 is arranged between the outer layer tank shell 401 and the inner layer tank shell 403, purified water is stored in the second sealed space 404, an annular floating plate 405 floats around the inner layer tank shell 403 on the water surface of the purified water, a one-way ventilation mechanism is arranged above the second sealed space 404 and in the first annular limiting block 428 and close to the outer layer tank shell 401, a first sealed space 402 is arranged in the inner layer tank shell 403, liquefied gas is stored in the first sealed space 402, a first movable tank bottom 429 is arranged above the first sealed space 402, a plurality of small cone grooves 416 are arranged above and below the first movable tank bottom 429 according to a certain rule, the first movable tank bottom 429 is arranged above the first annular limiting block 428, a plurality of small cone convex blocks 415 are connected above the first annular limiting block 428 according to a certain rule, and the small cone convex blocks 415 correspond to the small cone grooves 416 one by one.

Further, the annular floating plate 405 is composed of an inner annular plate 426 and an outer annular plate 425, the inner annular plate 426 is in close contact with the inner tank shell 403, the outer annular plate 425 is in close contact with the outer tank shell 401, the middle of the outer annular plate is connected with the middle of the outer tank shell 401 through a connecting block 422, an annular groove 410 is arranged below the middle of the connecting block 422, first through holes 427 are arranged in the annular groove 410 at intervals, third sealed spaces 411 are respectively arranged on two sides, located on the annular groove 410, of the inner portion of the annular floating plate 405, and the third sealed spaces 411 are filled with air.

Further, one-way ventilation mechanism are located first annular stopper 428, including venthole 412, first pipeline 421 is connected to venthole 412 top, in the first pipeline 421 with the venthole 412 junction be equipped with one-way ventilation piece 413, be equipped with a plurality of second through-holes 414 on the one-way ventilation piece 413, first pipeline 421 is connected to second through-hole 414 one end, the other outer pot shell 401 of other end venthole 412 is stopped up, one-way ventilation piece 413 top is located first pipeline 421 in-connection and has spring 417.

Further, the interior of the tank body 4 is divided into a multi-layer structure, wherein the tank body 4 in the middle layer is divided into an outer layer tank shell 401 and a first movable inner layer tank shell 423, a third pipeline 406 is arranged in the middle of the outer layer tank shell 401, a one-way ventilation mechanism is communicated to the third pipeline 406 through a sixth through hole 420, the first movable inner layer tank shell 423 is connected with a first movable tank bottom 429, a plurality of small cone grooves 416 are respectively arranged on the upper side and the lower side of the first movable tank bottom 429 according to a certain rule, a second annular limiting block 430 is arranged above the first movable tank bottom 429, a plurality of small cone convex blocks 415 are connected below the second annular limiting block 430 according to a certain rule, the small cone convex blocks 415 correspond to the small cone grooves 416 one by one, the outer layer tank shell 401 is connected with the first movable inner layer tank shell 423 through a second annular limiting block 430 and a third annular limiting block 432, a fourth sealing space 431 is arranged between the movable inner layer tank shell 401 and the first movable inner layer tank shell 423, purified water is stored in a fourth sealed space 431, an annular floating plate 405 floats around a first movable inner-layer tank shell 423 on the water surface of the purified water, a second pipeline 407 is arranged in the fourth sealed space 431 according to a certain rule, a third through hole 419 is arranged in each second pipeline 407, one end of each third through hole 419 penetrates through a second annular limiting block 430, the second pipeline 407 penetrates through a part of first through holes 427 of the annular floating plate 405, a one-way ventilation mechanism is respectively arranged at the position, close to the outer-layer tank shell 401, above the fourth sealed space 431 and in the position of the third annular limiting block 432 and at the other end of each third through hole 419, a fifth sealed space 408 is arranged in the first movable inner-layer tank shell 423, liquefied gas is stored in the fifth sealed space 408, a second movable tank bottom 433 is arranged above the fifth sealed space 408, a plurality of small conical grooves 416 are respectively arranged above and below the second movable tank bottom 433 according to a certain rule, the second movable tank bottom 433 is located above the third annular limiting block 432, a plurality of small cone protruding blocks 415 are connected above the third annular limiting block 432 according to a certain rule, the small cone protruding blocks 415 correspond to the small cone grooves 416 one by one, the third through hole 419 is connected to the fourth through hole 418 after being connected with a one-way ventilation mechanism, the fourth through hole 418 is communicated with the fifth through hole 424, and the fifth through hole 424 is located at the upper side of the first movable inner-layer tank shell 423.

Further, the interior of the tank body 4 is divided into a multilayer structure, wherein the tank body 4 at the uppermost layer is divided into an outer layer tank shell 401 and a second movable inner layer tank shell 434, the second movable inner layer tank shell 434 is connected with a second movable tank bottom 433, a fourth annular limiting block 435 is arranged above the second movable tank bottom 433, a plurality of small cone bumps 415 are connected below the fourth annular limiting block 435 according to a certain rule, the small cone bumps 415 are in one-to-one correspondence with the small cone grooves 416, the outer layer tank shell 401 is connected with the second movable inner layer tank shell 434 through the fourth annular limiting block 435 and a fifth annular limiting block 436, a sealed space is arranged between the outer layer tank shell 401 and the second movable inner layer tank shell 434, the sealed space is the same as the fourth sealed space 431, a one-way ventilation mechanism is arranged at the other end of a third through hole 419 in the fifth annular limiting block 436 above the sealed space, a sixth sealed space 409 is arranged in the second movable inner layer tank shell 434, liquefied gas is stored in the sixth sealed space 409, the liquefied gas 406 is communicated with a fourth through hole 437, and a fourth pipeline 409 is arranged above the sealed space 3.

Principle of operation

Referring to fig. 1 to 7, the tank body is divided into a multi-layer structure, liquefied gas is stored in a sealed space formed by an inner tank shell of each layer, such as a first sealed space 402, a fifth sealed space 408 and a sixth sealed space 409, the tank shell is of a double-layer structure, and purified water is stored in a sealed space formed between an outer tank shell 401 and the inner tank shell 403, between a first movable inner tank shell 423 and between a second movable inner tank shell 434, such as a second sealed space 404 and between a fourth sealed space 431, and the existence of the purified water can effectively buffer the liquefied gas during transportation due to derailing and overturning of the liquefied petroleum gas tank wagon, collision of the tank wagon during transportation and mechanical impact of surrounding objects (such as cranes and the like) on the liquefied gas tank.

When liquefied gas is used at first, the valve 1 is opened, the liquefied gas flows from the sixth sealed space 409 to the outside through the fourth pipeline 301, at this time, most of the liquefied gas is still in a liquid state due to the fact that the liquefied gas in the sixth sealed space 409 is just used, a part of the liquefied gas is vaporized into high-pressure petroleum gas, due to the gravity of the liquid liquefied gas, the pressure of the vaporized petroleum gas and the gravity of the second movable tank bottom 433 and the second movable inner layer tank shell 434, the second movable tank bottom 433 and the second movable inner layer tank shell 434 overcome the pressure of the vaporized petroleum gas in the fifth sealed space 408 and are tightly pressed on the third annular limiting block 432, and the small cone convex block 415 on the third annular limiting block 432 tightly blocks the small cone groove 416 on the second movable tank bottom 433, so that leakage cannot occur. When the liquefied gas in the sixth sealed space 409 is gradually used, the gravity of the liquefied gas in the sixth sealed space 409 and the pressure of the vaporized petroleum gas are not enough to overcome the pressure of the vaporized petroleum gas in the fifth sealed space 408, the second movable tank bottom 433 and the second movable inner tank shell 434 are slowly jacked upwards, the small cone groove 416 in the second movable tank bottom 433 is separated from the small cone bump 415 in the third annular limiting block 432, a gap appears, and the vaporized petroleum gas in the fifth sealed space 408 enters the sixth sealed space 409 through the small cone groove 416, the third through hole 419, the one-way ventilation mechanism, the fourth through hole 418 and the fifth through hole 424, and is continuously used; and so on, and finally, the liquefied gas in the first sealed space 402 is used until all the liquefied gas is vaporized, and the normal operation is finished.

When the damage and leakage of the inner ring of the annular floating plate 405 is stopped sliding down when the inner ring position is at the same water level as the damaged position, the annular floating plate 405 stops sliding down to block the leakage of the inner ring 426, and the leakage of the inner ring position is prevented, taking the first sealed space 402 as an example, when the inner ring 403 is damaged and leaked, the outer shell 401 is not obstructed, the liquefied gas in the first sealed space 402 is vaporized and enters the second sealed space 404, because the petroleum gas and the water do not react and are insoluble in water, the liquefied gas enters the sixth sealed space 409 through the annular groove 410, a part of the first through holes 427, the one-way ventilation mechanism, the third pipeline 406, the seventh through holes 437, the third through holes 419, the one-way ventilation mechanism, the fourth through holes 418 and the fifth through holes 424 in a gas state and is normally used, meanwhile, the pressure detector in the sixth sealed space 409 detects the increase of pressure, and sends out an alarm to prompt maintenance personnel to maintain or replace as soon as possible, and simultaneously, as the petroleum gas in the first sealed space 402 decreases, the pressure decreases, the purified water in the second sealed space 404 enters the first sealed space 402 from the damaged position and descends, and the annular floating plate 405 also slides down along with the same water level as the damaged position.

When in transportation or use, the improper condition of taking place the damage and revealing of protection, take first confined space 402 department as an example, when inner shell 403 is not obstructed, outer shell 401 is damaged and is revealed, the pure water outflow in the second confined space 404, the water level descends, annular floating plate 405 also along with gliding, when the water level is in same horizontal line with damaged position, annular floating plate 405 stops gliding, damaged department of revealing can be stopped up to outer annular plate 425, the water that flows simultaneously can remind maintainer to maintain or change.

When the situation of damage and leakage is improperly protected during transportation or use, taking the first sealed space 402 as an example, when the inner shell 403 is damaged and leaked, the outer shell 401 is damaged and leaked, and the damaged and leaked position of the inner shell 403 and the damaged and leaked position of the outer shell 401 are at the same horizontal line, liquefied gas in the first sealed space 402 vaporizes into the second sealed space 404, and as petroleum gas and water do not react and are insoluble in water, the liquefied gas passes through the annular groove 410, a part of the first through holes 427, the one-way ventilation mechanism, the third pipeline 406, the seventh through hole 437, the third through hole 419, the one-way ventilation mechanism, the fourth through hole 418 and the fifth through hole 424 in a gaseous state, enters the sixth sealed space 409 and is normally used, the pressure detector in the sixth sealed space 409 detects an increase in pressure, an alarm is sent to remind a maintainer to repair or replace the outer shell as soon as possible, and as the pressure of the first sealed space 402 is greatly reduced, the inner ring in the fifth sealed space 408 is unchanged, therefore, the pressure of the inner ring-shaped sealed space 429 is increased, the pressure of the inner ring-shaped floating plate 405 is capable of blocking the inner ring-shaped space 405 and the purified water flowing out of leaking from the annular groove 404, and the inner ring plate 405 is stopped to the lower-shaped sealed space when the inner ring-shaped tank bottom of leaking position where the inner ring-shaped tank shell 401 is damaged and the lower-shaped sealing plate 404, and the inner ring-shaped floating plate is damaged and the inner ring-shaped sealing plate is leaked position, and the inner ring-shaped sealing plate is damaged and the inner ring-shaped floating plate is leaked position is leaked water level of the inner ring-shaped sealing plate is leaked, and the lower-shaped sealing plate is stopped.

When the situation of damage and leakage is improperly protected during transportation or use, taking the first sealed space 402 as an example, when the inner shell 403 is damaged and leaked, the outer shell 401 is damaged and leaked, and the damaged and leaked position of the inner shell 403 is higher than the damaged and leaked position of the outer shell 401, liquefied gas in the first sealed space 402 vaporizes into the second sealed space 404, and as petroleum gas and water do not react and are insoluble in water, the liquefied gas passes through the annular groove 410, a part of the first through hole 427, the one-way ventilation mechanism, the third pipeline 406, the seventh through hole 437, the third through hole 419, the one-way ventilation mechanism, the fourth through hole 418 and the fifth through hole 424 in a gas state, enters the sixth sealed space 409 and is normally used, the pressure detector in the sixth sealed space 409 detects an increase in pressure, sends an alarm to remind a maintenance person to repair or replace the liquefied gas as soon as possible, and as the pressure in the fifth sealed space 408 is greatly reduced due to a large pressure, the pressure in the fifth sealed space 402 is unchanged, and the purified water can flow out of the annular sealing plate 405, and the annular sealing plate 405 can stop leaking, and the purified water can flow out of the annular sealing plate 425 at the same annular sealing plate 405, and the annular sealing plate 405.

When the situation of damage and leakage is improperly protected during transportation or use, taking the first sealed space 402 as an example, when the inner shell 403 is damaged and leaked, the outer shell 401 is damaged and leaked, and the damaged and leaked position of the inner shell 403 is lower than the damaged and leaked position of the outer shell 401, purified water in the second sealed space 404 flows out, the water level drops, the annular floating plate 405 also slides down, when the water level and the damaged position are on the same horizontal line, the annular floating plate 405 stops sliding down, the outer ring plate 425 can block the damaged and leaked position, and the outflowing water can remind a maintenance person to perform maintenance or replacement, while liquefied gas in the first sealed space 402 vaporizes into the second sealed space 404, since the liquefied gas and the water do not react and are insoluble, and the damaged and leaked position of the liquefied gas of the inner shell 403 is lower than the damaged and leaked position of the outer shell, the maintenance person can send an alarm that the pressure in the first sealed space 402 is increased to the first sealed space 409, and the pressure of the first sealed space 402 is increased, and the pressure of the first sealed space 402 is increased.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A double leakage-proof liquefied gas tank comprises a valve (1), wherein the valve (1) is used for controlling the speed of inlet and outlet of liquefied gas, an air outlet pipe (3) is connected below the valve (1), a liquefied gas meter (2) is arranged on the air outlet pipe (3) and used for detecting the amount of inlet and outlet of the liquefied gas and the content, pressure and temperature of residual liquefied gas in the liquefied gas tank, and the air outlet pipe (3) is connected to a tank body (4); the tank body (4) is internally divided into a multi-layer structure, the tank body (4) at the lowest layer is divided into an outer layer tank shell (401) and an inner layer tank shell (403), the outer layer tank shell (401) is connected with the inner layer tank shell (403) through a first annular limiting block (428), a second sealed space (404) is arranged between the outer layer tank shell (401) and the inner layer tank shell (403), purified water is stored in the second sealed space (404), an annular floating plate (405) floats on the water surface around the inner layer tank shell (403), a one-way ventilation mechanism is arranged in the first annular limiting block (428) and close to the outer layer tank shell (401), a first sealed space (402) is arranged in the inner layer tank shell (403), liquefied gas is stored in the first sealed space (402), a first movable cone (429) is arranged above the first sealed space (402), a plurality of small cone grooves (415) are respectively arranged above and below the first annular limiting block (428) according to a certain rule, a plurality of small cone grooves (415) are connected with a plurality of first movable cone grooves (415) which correspond to the tank bottom (428), and a plurality of first cone grooves (415) which correspond to the tank bottom of the first cone (428); the interior of the tank body (4) is of a multi-layer structure, the tank body (4) in the middle layer is divided into an outer layer tank shell (401) and a first movable inner layer tank shell (423), a third pipeline (406) is arranged in the middle of the outer layer tank shell (401), the one-way ventilation mechanism is communicated to the third pipeline (406) through a sixth through hole (420), the first movable inner layer tank shell (423) is connected with the first movable tank bottom (429), a plurality of small cone grooves (416) are respectively arranged above and below the first movable tank bottom (429) according to a certain rule, a second annular limiting block (430) is arranged above the first movable tank bottom (429), a plurality of small cone convex blocks (415) are connected below the second annular limiting block (430) according to a certain rule, the small cone convex blocks (415) correspond to the small cone grooves (416) one by one, a second annular limiting block (430) and a third annular limiting block (432) are connected between the outer layer tank shell (401) and the first movable inner layer tank shell (423), a fourth annular floating tank shell (431) is arranged between the outer layer tank shell (401) and the first movable inner layer shell (423), a fourth floating tank shell (407) is sealed by a fourth pure water space (431) and a fourth pure water floating water space (407) is formed by surrounding the fourth annular limiting block (405), a third through hole (419) is arranged in each second pipeline (407), one end of each third through hole (419) penetrates through the second annular limiting block (430), the second pipeline (407) passes through a part of the first through hole (427) of the annular floating plate (405), a one-way ventilation mechanism is respectively arranged at the position, close to the outer layer tank shell (401), in the third annular limiting block (432) above the fourth sealed space (431) and at the other end of the third through hole (419), a fifth sealed space (408) is arranged in the first movable inner layer tank shell (423), liquefied gas is stored in the fifth sealed space (408), a second movable tank bottom (433) is arranged above the fifth sealed space (408), a plurality of small conical grooves (416) are respectively arranged at the upper part and the lower part of the second movable tank bottom (433) according to a certain rule, the second movable tank bottom (433) is positioned above the third annular limiting block (432), a plurality of small conical convex blocks (415) are connected above the third annular limiting block (432) according to a certain rule, the small cone convex blocks (415) correspond to the small cone concave grooves (416) one by one, the third through hole (419) is connected with a one-way ventilation mechanism and then connected with a fourth through hole (418), the fourth through hole (418) is communicated with a fifth through hole (424), the fifth through hole (424) is positioned at the upper side part of the first movable inner tank shell (423); the interior of the tank body (4) is divided into a multi-layer structure, wherein the tank body (4) at the uppermost layer is divided into an outer layer tank shell (401) and a second movable inner layer tank shell (434), said second movable inner shell (434) being connected to said second movable bottom (433), a fourth annular limiting block (435) is arranged above the second movable tank bottom (433), a plurality of small conical convex blocks (415) are connected below the fourth annular limiting block (435) according to a certain rule, the small cone convex blocks (415) correspond to the small cone concave grooves (416) one by one, the outer layer tank shell (401) is connected with the second movable inner layer tank shell (434) through a fourth annular limiting block (435) and a fifth annular limiting block (436), a sealed space is arranged between the outer layer tank shell (401) and the second movable inner layer tank shell (434), the arrangement in the sealed space is the same as that of a fourth sealed space (431), a one-way ventilation mechanism is arranged at the other end of the third through hole (419) in the fifth annular limiting block (436) above the sealed space, a sixth sealed space (409) is arranged in the second movable inner shell (434), the sixth sealed space (409) is filled with liquefied gas, the third pipeline (406) is communicated with the third through hole (419) through a seventh through hole (437), and a fourth pipeline (301) arranged in the air outlet pipe (3) is connected above the sixth sealed space (409).

2. The dual leak-proof liquefied gas tank as claimed in claim 1, wherein: the annular floating plate (405) is divided into an inner annular plate (426) and an outer annular plate (425), the inner annular plate (426) is in close contact with the inner tank shell (403), the outer annular plate (425) is in close contact with the outer tank shell (401), the middle of the inner annular plate is connected with a connecting block (422), an annular groove (410) is arranged below the middle part of the connecting block (422), first through holes (427) are formed in the annular groove (410) at intervals, third sealing spaces (411) are respectively arranged on two sides, located on the annular groove (410), of the inner portion of the annular floating plate (405), and the third sealing spaces (411) are filled with air.

3. The dual leak-proof liquefied gas tank as claimed in claim 1, wherein: including setting up in first annular stopper (428) one-way ventilation mechanism, including venthole (412), first pipeline (421) are connected to venthole (412) top, in first pipeline (421) with venthole (412) junction be equipped with one-way ventilative piece (413), be equipped with a plurality of second through-holes (414) on one-way ventilative piece (413), second through-hole (414) one end is connected first pipeline (421), the other end outer tank shell (401) other than venthole (412) are stopped up, one-way ventilative piece (413) top is located first pipeline (421) in-connection has spring (417).