CN110836329B - Energy release method of liquid gas storage tank - Google Patents

Energy release method of liquid gas storage tank Download PDF

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Publication number
CN110836329B
CN110836329B CN201911183627.4A CN201911183627A CN110836329B CN 110836329 B CN110836329 B CN 110836329B CN 201911183627 A CN201911183627 A CN 201911183627A CN 110836329 B CN110836329 B CN 110836329B
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gas
spring
pressure
gaseous
energy
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CN110836329A (en
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王栋
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

An energy release method for a liquid gas storage tank relates to the technical field of storage and transportation of gas tanks. It utilizes the law of conservation of energy, carry out energy preliminary release to gaseous atmospheric pressure by the release valve body, the piston valve body carries out energy secondary release to gaseous atmospheric pressure, the non return valve body carries out energy cubic release to gaseous atmospheric pressure, make gaseous gas overcome the in-process of spring acting, convert gaseous energy into the potential energy of spring, thereby reduce gaseous pressure, the heat that the external world of discharging afferent, in order to reduce the gas evaporation rate, ensure that the storage tank is stable, prolong liquid gaseous save time's advantage.

Description

Energy release method of liquid gas storage tank
Technical Field
The invention relates to the technical field of gas tank storage and transportation, in particular to an energy release method of a liquid gas storage tank.
Background
Controlling the emission of pollutants is a common general consensus among all people today with increasing emphasis on environmental hygiene. The use of green energy is proposed to the agenda. Hydrogen as an energy source has incomparable advantages: the combustion heat value of hydrogen is high, and the energy of hydrogen per kilogram after combustion is about 3 times that of gasoline, 3.9 times that of alcohol and 4.5 times that of coke; the product of hydrogen combustion is water, and has zero pollution to the environment; hydrogen reserves on earth are extremely abundant (prepared from seawater) and are renewable and recyclable. Therefore, hydrogen is the most ideal energy source for human beings, and is widely concerned by countries all over the world. Hydrogen energy, now considered to be the ultimate solution for mankind to solve the future energy crisis, as well as the most effective way to solve the current environmental problems.
From the preparation of hydrogen to the specific application of hydrogen, the storage of hydrogen is an indispensable link, but because hydrogen is a flammable and explosive substance, how to safely, cheaply and store hydrogen for a long time becomes the key for hydrogen energy utilization. Hydrogen (especially high-pressure hydrogen) can be stored in a tank, the filling and discharging speed is high, the basic energy consumption is low, the manufacturing economy of the storage tank is high, and the hydrogen storage tank is one of effective ways for storing hydrogen, but the density of the hydrogen at room temperature and normal atmospheric pressure is extremely low, and the hydrogen can be applied to vehicles only by improving the density storage. There are two methods to increase density: compression: it is now common practice to compress the hydrogen to 35 mpa or 70 mpa. This requires a high strength storage tank and therefore the weight of the tank far exceeds that of hydrogen, in the 1 ton hydrogen 10 ton tank. In addition, 35/70 MPa is a very high pressure gas, which is very dangerous for storage and transportation. Liquefaction: the hydrogen gas is cooled to-252 ℃ to obtain liquefied hydrogen gas, and the density of the liquefied hydrogen gas is 845 times of that of the liquefied hydrogen gas at the normal temperature. The shortcoming is that receive ambient temperature's influence, liquid hydrogen can the evaporation gasification, because ambient temperature is higher than the inside temperature of storage tank, the heat always can be introduced into the storage tank by external environment to make liquid gas be gasified after being heated, the inflation forms the high pressure in the storage tank, seriously threatens storage tank safety, thereby has restricted liquefied hydrogen's storage time and transportation distance, consequently need improve the energy release method of liquefied gas storage jar.
Disclosure of Invention
The invention aims to provide an energy release method of a liquid gas storage tank, which comprises the following steps:
s1, when the gas pressure P0 at the gas inlet is larger than or equal to the set value of the first spring, the gaseous gas overcomes the first spring to push the first valve plate to enter the release valve body, and simultaneously part of energy is converted into the potential energy of the first spring, so that the pressure of the gaseous gas is reduced to P1;
s2, when the pressure P1 of the gaseous gas in the first release chamber is larger than or equal to the set value of the second spring, the gaseous gas overcomes the second spring to push the piston to slide along the cylinder barrel until the vent hole is opened, and at the moment, partial energy is converted into potential energy of the second spring, so that the pressure of the gaseous gas is reduced to P2;
s3, when the pressure P2 of the gaseous gas in the vent hole is larger than or equal to the set value of the third spring, the gaseous gas overcomes the third spring to do work and pushes the third valve plate to enter the check valve body, at the moment, partial energy is converted into the potential energy of the third spring, so that the pressure of the gaseous gas is reduced to P3, and the gaseous gas enters the liquid gas storage tank through the gas outlet;
s4, after part of gas is discharged, the pressure P0 of the gas is reduced, and when the pressure is lower than the set value of the first spring, the first spring drives the first valve plate to close the gas inlet;
s5, the pressure P1 of the gas is reduced, when the pressure is lower than the set value of the second spring, the second spring pushes the piston to move towards one end of the first release chamber, and the vent hole is closed;
s6, the gas with the residual pressure P1 in the first release chamber permeates into the vent hole through the clearance between the piston and the cylinder sleeve and is discharged through the vent hole, and when the piston is pushed to the end close to the first release chamber, the balance is achieved;
and S7, the pressure of the gaseous gas P2 is gradually decreased, and when the pressure is lower than the set value of the third spring, the third spring pushes the third valve plate to close the third release chamber, and the backflow of the discharged gaseous gas is prevented.
After the technical scheme is adopted, the invention has the beneficial effects that:
1. according to the invention, a release valve body, a piston valve body and a check valve body are sequentially connected to the gas outlet of the storage tank by utilizing the law of energy conservation, the release valve body is used for primarily releasing energy of the gas pressure, the piston valve body is used for secondarily releasing energy of the gas pressure, and the check valve body is used for releasing energy of the gas pressure for three times, so that the energy (heat) of the gas is converted into potential energy of the spring in the process of overcoming the action of the spring by the gas, thereby reducing the pressure of the gas, discharging the heat transmitted from the outside, reducing the evaporation rate of the gas and further prolonging the storage time of the liquid gas.
2. According to the invention, the energy release devices of the liquid gas storage tank can be used in series or in parallel according to different pressure settings according to the pressure of gas and the capacity of the storage tank, so as to achieve the optimal energy release effect, thereby having stronger applicability and effectively solving the problem that the liquid gas is gasified and expanded by heating, and forms high pressure in the storage tank to threaten the safety of the storage tank in the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention when the pressure of the gaseous gas at the gas inlet, P0, is less than the first spring set point;
figure 2 is a schematic diagram of the arrangement of the invention when the pressure of the gaseous gas at the gas inlet, P0, is equal to or greater than the first spring set point.
Description of reference numerals: 01. a gas inlet; 02. a gas outlet; 1. releasing the valve body; 11. a relief valve body; 12. a first compression chamber; 13. a first valve shaft; 14. a first valve plate; 15. a first spring; 16. a first release chamber; 2. a piston valve body; 21. a piston valve body; 22. a cylinder sleeve; 23. a piston; 24. a second compression chamber; 25. a vent hole; 26. a second spring; 27. a gap; 3. a check valve body; 31. a check valve body; 32. a third release chamber; 33. a third valve shaft; 34. a third valve plate; 35. and a third spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment as necessary without making a contribution thereto after reading the present specification, but all are protected by patent laws within the scope of the claims of the present invention.
The present embodiment relates to an energy release device for a liquid gas storage tank, as shown in fig. 1, comprising: the device comprises a release valve body 1 communicated with an air outlet of a storage tank, a piston valve body 2 communicated with the release valve body 1, and a check valve body 3, wherein one end of the check valve body 3 is communicated with the other end of the piston valve body 2 and is communicated with an air inlet of the storage tank, the release valve body 1 is used for supplying gaseous gas with the air pressure of P0 to a release device, and the gaseous gas with the air pressure of P0 is subjected to energy primary release to reduce the pressure to P1; the piston valve body 2 is used for releasing the energy of the gaseous gas with the gas pressure of P1 again to reduce the pressure to P2 and realize the static pressure balance of the gas in the releasing device; the check valve body 3 is used for carrying out the energy with the gaseous state gas that atmospheric pressure is P2 and releases once more and makes pressure drop for P3 to prevent the check valve body 3 of gaseous state gas backward flow, thereby the reasonable and orderly carries out the energy release to gaseous state gas, is consumed by the part with the energy in the gaseous state gas, therefore passes to the gaseous heat energy of outside and converts the potential energy of spring into, and then reduces the gas evaporation rate, improves the storage tank security, does benefit to the save time of extension liquid gas storage tank.
As shown in fig. 1 and 2, the relief valve body 1 includes: the relief valve body 11: a first release chamber 16 provided in the release valve body 11 and having a gas inlet 01 formed at one end thereof; a first compression chamber 12 provided in the relief valve body 11; a first valve shaft 13 having one end slidably fitted in the first compression chamber 12 and the other end inserted in the first release chamber 16; a first valve plate 14 provided at one end of the first valve shaft 13 and abutting against the gas inlet 01; and a first spring 15 disposed in the first compression chamber 12 and abutting against the first valve shaft 13, wherein when the pressure of the gas inlet 01 is smaller than a set value of the first spring 15, the first spring 15 drives the first valve plate 14 to abut against the gas inlet 01, as shown in fig. 2, when the pressure of the gas inlet 01 is greater than or equal to the set value of the first spring 15, the first valve plate 14 is pushed by the gaseous gas, so that the first spring 15 is compressed to make the first valve plate 14 far away from the gas inlet 01, thereby releasing the gaseous gas into the first release chamber 16, and meanwhile, in the process of pushing the first valve plate 14, the gaseous gas needs to overcome the elastic force of the first spring 15 to do work, thereby converting the potential energy of the gas into the potential energy of the spring, so that the gaseous gas with the gas pressure of P0 is subjected to energy release to reduce the pressure to P1.
As shown in fig. 1, the piston valve body 2 includes: a piston valve body 21; a cylinder sleeve 22 having one end connected to the first relief chamber 16; a piston 23 slidably fitted in the cylinder sleeve 22; and a second compression chamber 24 provided in the piston valve body 21 in the sliding direction of the piston 23; a plurality of vent holes 25 communicated with the check valve body 3 are radially arranged on the cylinder sleeve 22; a second spring 26 is provided in the second compression chamber 24 to abut against the piston 23, and when the pressure in the first release chamber 16 is smaller than a set value of the second spring 26, the second spring 26 drives the piston 23 to close the vent hole 25, as shown in fig. 2, when the pressure in the first release chamber 16 is greater than or equal to the set value of the second spring 26, the piston 23 is pushed by the gaseous gas in the first release chamber 16, so that the second spring 26 is compressed, after the piston 23 is continuously pushed and moved by the distance "L", the vent 25 is opened, and the second spring 26 is compressed to the shortest, meanwhile, the gaseous gas needs to overcome the elastic force of the second spring 26 to do work in the process of pushing the piston 23 to move, further converting the potential energy of the gas into the potential energy of the spring, so that the gaseous gas with the gas pressure of P1 is released to reduce the pressure to P2, and then enters the check valve body 3 through the vent hole 25.
As shown in fig. 1 and 2, the check valve body 3 includes: a check valve body 31; a third release chamber 32 provided in the check valve body 31 and having one end connected to the vent hole 25 and the other end provided with a gas outlet 02; a third valve shaft 33 having one end slidably fitted to the check valve body 31 and the other end inserted into the third relief chamber 32; a third valve plate 34 provided at an end of the third valve shaft 33 and abutting on an end of the third relief chamber 32 close to the vent hole 25; and a third spring 35 abutting between the side wall of the check valve body 31 and the third valve plate 34, when the pressure at the vent hole 25 is smaller than the set value of the third spring 35, the third spring 35 drives the third valve plate 34 to close the connection passage between the third release chamber 32 and the vent hole 25, when the pressure at the vent hole 25 is greater than or equal to the set value of the third spring 35, the third valve plate 34 is pushed by the gaseous gas at the vent hole 25, so that the third spring 35 is compressed, the gaseous gas enters the third release chamber 32, and meanwhile, the gaseous gas needs to work against the elastic force of the third spring 35 in the process of pushing the third valve plate 34 to move, so that the potential energy of the gas is further converted into the potential energy of the spring, and therefore, the gaseous gas with the gas pressure of P2 is released to reduce the pressure to P3, and then is discharged into the storage tank through the gas outlet 02 on the third release chamber 32.
In the present embodiment, the set value of the first spring 15 > the set value of the second spring 26 > the set value of the third spring 35. And the setting values of the first spring 15, the second spring 26 and the third spring 35 can be selected according to the gas pressure and the capacity of the storage tank, and after the gaseous gas passes through the release valve body 1, the piston valve body 2 and the check valve body 3 in sequence, the gaseous gas can partially discharge the heat transferred to the liquid gas storage tank from the outside and smoothly enter the bottom of the liquid gas storage tank for reliquefaction, so that the stability of the liquid gas in the storage tank is ensured.
It should be noted that, as shown in fig. 1, a gap 27 is provided between the piston 23 and the cylinder sleeve 22, when the gas inlet 01 is closed, the pressure of the gaseous gas in the first release chamber 16 is reduced, the piston 23 is reset under the action of the second spring 26, and during the resetting process, the gaseous gas in the first release chamber 16 enters the check valve body 3 through the vent hole 25 through the gap 27 to realize the static pressure balance of the gas in the release device. In the present embodiment, the check valve body 31, the relief valve body 11, and the piston valve body 21 are made of low temperature resistant materials.
Therefore, after the gaseous gas in the third release chamber 32 smoothly enters the liquid gas storage tank, the gaseous gas pressure P0 is reduced, when the gaseous gas is lower than the set value of the first spring 15, the first spring 15 drives the first valve plate 14 to close the gas inlet, at this time, the gaseous gas pressure P1 is reduced, and when the gaseous gas is lower than the set value of the second spring 26, the second spring 26 pushes the piston 23 to move towards one end of the first release chamber 16, and the vent hole 25 is closed; at this time, the residual gaseous gas in the first release chamber 16 permeates into the vent hole 25 through the gap 27 between the piston 23 and the cylinder sleeve 22 during the resetting process of the piston 23 and is discharged through the vent hole 25, and when the piston 23 is pushed to the end closest to the first release chamber 16, the static pressure balance of the internal gas is achieved; at this time, the pressure P2 of the gas is gradually decreased, and when it is lower than the set value of the third spring 35, the third spring 35 pushes the third flap 34 to close the third discharging chamber 32, preventing the discharged gas from flowing back, i.e. completing the entire energy discharging operation, and when the pressure of the gas inlet 01 is again greater than or equal to the set value of the first spring 15, the energy discharging device of the liquid gas storage tank enters the second energy discharging operation.
In order to further improve the applicability of the device, the embodiment also relates to an energy release system of the liquid gas storage tank, the system comprises a plurality of energy release devices of the liquid gas storage tank which are connected in series or in parallel, and the energy release devices of the liquid gas storage tank with proper quantity can be selected to be connected in series or in parallel according to the gas pressure or the storage tank capacity condition so as to achieve the optimal energy release effect.
Based on the energy release device for the liquid gas storage tank, the embodiment further relates to an energy release method for the liquid gas storage tank, and the method includes:
s1, when the gas pressure P0 at the gas inlet 01 is larger than or equal to the set value of the first spring 15, the gaseous gas overcomes the first spring 15 to push the first valve plate 14 to enter the release valve body 1, and meanwhile, partial energy is converted into potential energy of the first spring 15, so that the pressure of the gaseous gas is reduced to P1;
s2, when the pressure P1 of the gaseous gas in the first release chamber 16 is larger than or equal to the set value of the second spring 26, the gaseous gas overcomes the second spring 26 to push the piston 23 to slide along the cylinder barrel until the vent hole 25 is opened, and at the moment, partial energy is converted into the potential energy of the second spring 26, so that the pressure of the gaseous gas is reduced to P2;
s3, when the pressure P2 of the gaseous gas in the vent hole 25 is larger than or equal to the set value of the third spring 35, the gaseous gas overcomes the work of the third spring 35 and pushes the third valve sheet 34 to enter the check valve body 3, and at the moment, partial energy is converted into the potential energy of the third spring 35, so that the pressure of the gaseous gas is reduced to P3 and the gaseous gas enters the liquid gas storage tank through the gas outlet 02;
s4, after partial gas is discharged, the pressure P0 of the gas is reduced, and when the pressure is lower than the set value of the first spring 15, the first spring 15 drives the first valve plate 14 to close the gas inlet 01;
s5, the pressure P1 of the gas decreases, when the pressure is lower than the set value of the second spring 26, the second spring 26 pushes the piston 23 to move towards one end of the first release chamber 16, and the vent hole 25 is closed;
s6, the gas with the residual pressure P1 in the first release chamber 16 permeates into the vent hole 25 through the clearance 27 between the piston 23 and the cylinder sleeve 22 and is discharged through the vent hole 25, and when the piston 23 is pushed to be close to one end of the first release chamber 16, the balance is achieved;
s7, at this time, the pressure of the gaseous gas P2 is gradually decreased, and when it is lower than the set value of the third spring 35, the third spring 35 pushes the third flap 34 to close the third relief chamber 32, preventing the discharged gaseous gas from flowing backward.
The working principle of the invention is roughly as follows: according to the invention, the gas outlet of the storage tank is sequentially connected with the release valve body 1, the piston valve body 2 and the check valve body 3 by utilizing the law of conservation of energy, the release valve body 1 primarily releases energy of gas pressure, the piston valve body 2 secondarily releases energy of the gas pressure, and the check valve body 3 releases energy of the gas pressure for three times, so that the energy (heat) of gas is converted into potential energy of a spring in the process of overcoming the action of the spring by the gas, the pressure of the gas is reduced, the heat transmitted from the outside is discharged, the evaporation rate of the gas is reduced, and the storage time of the liquid gas is further prolonged. The energy release devices of the liquid gas storage tank can be used in series or in parallel according to different pressure settings according to the pressure of gas and the capacity of the storage tank, so that the optimal energy release effect is achieved, the liquid gas storage tank has high applicability, and the problem that the liquid gas is heated, gasified and expanded to form high pressure in the storage tank and threaten the safety of the storage tank in the prior art is effectively solved.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered by the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (1)

1. A method of releasing energy from a liquid gas storage tank, the method comprising:
s1, when the gas pressure P0 at the gas inlet (01) is larger than or equal to the set value of the first spring (15), the gaseous gas overcomes the first spring (15) to push the first valve plate (14) to enter the release valve body (1), and meanwhile, partial energy is converted into the potential energy of the first spring (15), so that the pressure of the gaseous gas is reduced to P1;
s2, when the pressure P1 of the gaseous gas in the first release chamber (16) is larger than or equal to the set value of the second spring (26), the gaseous gas overcomes the second spring (26) to push the piston (23) to slide along the cylinder barrel until the vent hole (25) is opened, and at the moment, partial energy is converted into the potential energy of the second spring (26), so that the pressure of the gaseous gas is reduced to P2;
s3, when the pressure P2 of the gaseous gas in the vent hole (25) is larger than or equal to the set value of the third spring (35), the gaseous gas overcomes the third spring (35) to do work and pushes the third valve plate (34) to enter the check valve body (3), at the moment, partial energy is converted into the potential energy of the third spring (35), the pressure of the gaseous gas is reduced to P3, and the gaseous gas enters the liquid gas storage tank through the gas outlet (02);
s4, after partial gas is discharged, the pressure P0 of the gas is reduced, and when the pressure is lower than the set value of the first spring (15), the first spring (15) drives the first valve plate (14) to close the gas inlet (01);
s5, the pressure P1 of the gas decreases, when the pressure is lower than the set value of the second spring (26), the second spring (26) pushes the piston (23) to move towards one end of the first release chamber (16), and the vent hole (25) is closed;
s6, the gas with the residual pressure P1 in the first release chamber (16) permeates into the vent hole (25) through the clearance (27) between the piston (23) and the cylinder sleeve (22) and is discharged through the vent hole (25), and when the piston (23) is pushed to be close to one end of the first release chamber (16), the balance is achieved;
s7, the pressure P2 of the gas gradually decreases, and when the pressure is lower than the set value of the third spring (35), the third spring (35) pushes the third valve plate (34) to close the third release chamber (32), and the discharged gas is prevented from flowing back.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609524A1 (en) * 1987-01-10 1988-07-15 Autoflug Gmbh GAS BOTTLE WITH TRIGGER DEVICE
CN2209745Y (en) * 1994-11-01 1995-10-11 王延平 Pressure-regulating energy-saving liquid gas compression release valve
CN2400676Y (en) * 1999-10-29 2000-10-11 胡成显 Light-weight steel cylinder capable of automatic controlling internal pressure
CN2527792Y (en) * 2001-10-27 2002-12-25 欣慰 LPG cylinder general timing safety valve
DE202004018237U1 (en) * 2004-11-25 2005-02-24 Festo Ag & Co. Valve arrangement for plastic bottle blow molding assembly has main valve limiting air supply
CN211371915U (en) * 2019-11-27 2020-08-28 王栋 Energy release device and system of liquid gas storage tank

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609524A1 (en) * 1987-01-10 1988-07-15 Autoflug Gmbh GAS BOTTLE WITH TRIGGER DEVICE
CN2209745Y (en) * 1994-11-01 1995-10-11 王延平 Pressure-regulating energy-saving liquid gas compression release valve
CN2400676Y (en) * 1999-10-29 2000-10-11 胡成显 Light-weight steel cylinder capable of automatic controlling internal pressure
CN2527792Y (en) * 2001-10-27 2002-12-25 欣慰 LPG cylinder general timing safety valve
DE202004018237U1 (en) * 2004-11-25 2005-02-24 Festo Ag & Co. Valve arrangement for plastic bottle blow molding assembly has main valve limiting air supply
CN211371915U (en) * 2019-11-27 2020-08-28 王栋 Energy release device and system of liquid gas storage tank

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