CN210437809U

CN210437809U - Liquid storage tank

Info

Publication number: CN210437809U
Application number: CN201921022073.5U
Authority: CN
Inventors: 顾华; 刘东进; 尹红伟; 甘少炜; 范洪军; 徐小艳; 李晓晨
Original assignee: China International Marine Containers Group Co Ltd; Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd; CIMC Enric Investment Holdings Shenzhen Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd; CIMC Enric Investment Holdings Shenzhen Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-05-01
Anticipated expiration: 2029-07-02

Abstract

The utility model provides a liquid storage tank, its jar body is used for storing liquid. The anti-shaking pipe is vertically arranged in the tank body, the lower end of the anti-shaking pipe is fixedly arranged at the bottom of the inner wall of the tank body and surrounds the pressure tapping, and a liquid inlet hole is formed in the bottom of the pipe wall of one side of the anti-shaking pipe back to the liquid phase tapping. The pressure taking end of the liquid phase pressure taking pipe extends into the anti-shaking pipe through the pressure taking port. The liquid blocking piece is arranged in the shake-proof pipe and is positioned between the pressure taking end and the liquid inlet hole so as to separate the pressure taking end from the liquid inlet hole. Foretell liquid storage tank through the jar in set up prevent shaking the pipe with hinder liquid spare, can prevent to show the condition of rocking at the level gauge of jar body in the production of filling, use and transportation for the liquid level shows accurately, the real time monitoring of the liquid storage tank of being convenient for has guaranteed the normal filling and the use of liquid storage tank, has improved liquid storage tank and has filled and the efficiency of use.

Description

Liquid storage tank

Technical Field

The utility model relates to a liquid warehousing and transportation equipment technical field, in particular to liquid storage tank.

Background

The Liquefied Natural Gas (LNG) storage tank is composed of an inner container, an outer container, a heat insulation material, a stressed structural member and a process pipeline. Wherein the inner vessel primarily stores cryogenic liquefied gas. And a heat insulation material is filled between the outer container and the inner container so as to reduce the heat conduction and the heat radiation of the natural gas storage tank. The stressed structural member is a section steel or glass fiber reinforced plastic support. The process pipeline can meet the practical use requirements, such as filling, liquid discharging and safe discharging, pressure measurement, liquid level display and the like.

Some LNG storage tanks are mounted on ships and can sway with the ships. During filling and using of the LNG storage tank, a liquid level meter is needed to measure liquid in the tank. However, the reading of the level gauge may shake with the liquid level to fail to display an accurate liquid level value, resulting in the analysis of the level gauge showing shaking as follows:

firstly, in the feed liquor process of filling dress, the liquid pressure that gets into the LNG storage tank is higher, and the flow is great simultaneously, direct shock jar interior liquid for the liquid phase of level gauge is got pressure port position department and is constantly produced the pressure transient, thereby leads to the level gauge to show and rock.

Secondly, the LNG storage tank is in the state of rocking always in sea transportation process, and the liquid of the liquid phase pressure taking port department of level gauge is also in the state of rocking equally, can not reflect the liquid level decline in the actual use process completely, and the liquid level shows inaccurate inadequately.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquid storage tank to the demonstration of solving among the prior art level gauge is rocked and is influenced jar body and normally fill dress and the problem of use.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a liquid storage tank, comprising: a tank body for storing liquid therein; the bottom of the tank body is provided with a liquid phase liquid inlet for liquid inlet and a pressure measuring port for measuring the liquid level of the liquid; the anti-shaking pipe is vertically arranged in the tank body, the lower end of the anti-shaking pipe is fixedly arranged at the bottom of the inner wall of the tank body and surrounds the pressure taking port, and the upper end of the anti-shaking pipe is positioned in the gas phase space of the tank body; a liquid inlet hole is formed in the bottom of the pipe wall of one side, back to the liquid phase port, of the anti-sloshing pipe; a liquid level meter having a liquid phase pressure tapping pipe; the pressure taking end of the liquid phase pressure taking pipe extends into the anti-sloshing pipe through the pressure taking port; the liquid blocking piece is arranged in the anti-shaking pipe and is close to the pressure taking end; the liquid blocking piece is positioned between the pressure taking end and the liquid inlet hole so as to separate the pressure taking end from the liquid inlet hole.

According to one embodiment of the present invention, the liquid blocking member is a hollow housing, and the upper and lower ends thereof have openings; the periphery of the upper end of the liquid blocking piece is fittingly attached to and hermetically connected with the inner peripheral wall of the anti-shaking pipe; a pressure taking space is formed between the outer peripheral wall of the liquid blocking piece and the inner wall of the bottom of the anti-shaking pipe; an air chamber is arranged above the pressure taking space;

according to the utility model discloses an embodiment, the pressure taking end with the feed liquor hole branch row is in prevent shaking pipe ascending relative both sides in week.

According to an embodiment of the present invention, the liquid blocking member is an inverted cone, and the diameter of the liquid blocking member is gradually reduced in a direction from top to bottom; the caliber of the lower end opening of the liquid blocking piece is smaller than that of the upper end opening of the liquid blocking piece.

According to the utility model discloses an embodiment, the lower extreme open-ended bore that hinders liquid spare is greater than the diameter in feed liquor hole.

According to the utility model discloses an embodiment, the lower extreme open-ended position of hindering liquid spare is not higher than the position in feed liquor hole.

According to an embodiment of the utility model, the lower extreme that hinders liquid spare is most advanced form, and its lower extreme opening forms the drainage mouth.

According to an embodiment of the utility model, the tank also comprises a sleeve arranged on the top of the inner wall of the tank body; the sleeve is positioned in the gas phase space inside the tank body; the upper end of the sleeve is fixedly connected with the inner wall, and the lower end of the sleeve is provided with an opening for the anti-shaking pipe to extend into; the sleeve and the anti-shaking pipe are in clearance fit.

According to an embodiment of the present invention, the liquid level meter has a gas phase pressure tapping pipe; and the pressure taking end of the gas phase pressure taking pipe extends into the anti-sloshing pipe to be communicated with the gas phase space.

According to one embodiment of the present invention, the liquid blocking member is a hollow housing, and the upper and lower ends thereof have openings; the periphery of the lower end of the liquid blocking piece surrounds the pressure taking port and is fixedly connected with the bottom of the inner wall of the tank body; the peripheral wall of the liquid blocking piece is provided with a through hole; the pressure taking end can extend into the liquid blocking piece through the pressure taking port.

According to the above technical scheme, the utility model provides a pair of liquid storage tank has following advantage and positive effect at least:

this liquid storage tank improves the liquid phase process pipeline structure about its level gauge, has specifically add and to have prevented that the liquid level that the level gauge was got the pressure department from rocking prevents shaking pipe and hinder liquid spare by a wide margin to avoid the demonstration of level gauge to rock, make the level gauge can measure accuracy, reading accuracy, in order to guarantee the normal dress and the use of filling of jar body. Wherein, the anti-shaking pipe is arranged in a hollow way and is correspondingly covered at the pressure taking port of the liquid level meter. The anti-shaking pipe isolates the pressure tapping from the liquid outside the anti-shaking pipe, so that the pressure tapping is resisted with the impact generated by shaking of the liquid outside the pipe, and pressure transient caused by shaking at the pressure tapping is avoided. So, the end of getting of pressing the pipe can stretch into through getting the pressure mouth and prevent shaking intraduct when the liquid phase of level gauge gets the pressure, has just obtained and has prevented shaking the protective action that prevents shaking that the pipe provided. And the liquid inlet hole of the anti-shaking pipe is arranged on the pipe wall at one side back to the liquid phase port, so that the direct impact of the liquid in the filling process is avoided. The liquid blocking piece is arranged in the anti-shaking pipe and can further prevent shaking caused by liquid entering the anti-shaking pipe. Specifically, the liquid blocking member is located between the pressure taking end and the liquid inlet hole to separate the pressure taking end from the liquid inlet hole. The liquid blocking piece can resist and weaken the impact of liquid from the liquid inlet hole to reduce the liquid level shaking amplitude of the pressure taking end at the back, so that the pressure taking end can obtain accurate measurement values, and finally the liquid level value of the liquid level meter is in a stable display state. Foretell liquid storage tank through the jar in set up prevent shaking the pipe with hinder liquid spare, can prevent to show the condition of rocking at the level gauge of jar body in the production of filling, use and transportation for the liquid level shows accurately, the real time monitoring of the liquid storage tank of being convenient for has guaranteed the normal filling and the use of liquid storage tank, has improved liquid storage tank and has filled and the efficiency of use.

Drawings

Fig. 1 is a schematic structural view of a liquid tank according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is an enlarged view of a portion B of fig. 1.

Fig. 4 is a schematic structural view of a liquid blocking member in the second embodiment of the present invention.

The reference numerals are explained below: 100-liquid tank body, 1-tank body, 11-inner container, 12-outer container, 13-liquid phase port, 14-liquid inlet pipe, 15-pressure taking port, 2-liquid level meter, 21-liquid phase pressure taking pipe, 211-liquid phase inner pipe section, 212-liquid phase outer pipe section, 22-gas phase pressure taking pipe, 211-gas phase inner pipe section, 212-gas phase outer pipe section, 23-pressure taking end, 3-anti-shaking pipe, 31-liquid inlet hole, 4-sleeve, 5-liquid blocking piece, 51-pressure taking space and 511-air chamber; 52-drainage opening, 53-through hole.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

The embodiment provides a liquid storage tank, improves through the liquid phase process pipeline to the level gauge, has add and has prevented shaking the pipe and hinder liquid spare to this has mainly overcome the in-tank liquid free shaking in the marine transportation process and has filled the level gauge that a large amount of liquid impact of in-process caused and show to shake and measure inaccurate difficulty, has guaranteed the normal dress and the use of fluid reservoir.

First embodiment of liquid storage tank

Referring to fig. 1, a structure of a liquid storage tank 100 according to the present embodiment is first described. The liquid storage tank 100 generally includes a tank body 1 for storing a cryogenic LNG liquid, a level gauge 2 communicating with the tank body 1, and an anti-sloshing pipe 3, a sleeve 4, and a liquid blocking member 5 located inside the tank body 1.

The tank body 1 is a horizontal double-layer shell pressure container, and mainly comprises an inner container 11, an outer container 12, a heat insulation material, a stress structure and a process pipeline. Wherein the inner vessel 11 is used for storing the cryogenic liquid LNG and the outer vessel 12 wraps the inner vessel 11 from the outside. The outer vessel 12 and the inner vessel 11 form a sandwich between them which is evacuated and filled with an insulating material to reduce thermal conduction, radiation and convection of the liquid in the vessel.

With reference to the view direction of fig. 1, the longitudinal direction of the inner container 11 is the left-right direction, and a liquid phase port 13 located on the left side and a pressure taking port 15 located on the right side are provided at an interval at the bottom of the inner container 11. Wherein, the liquid phase port 13 is correspondingly provided with a bottom liquid inlet pipe 14. The outer tank is filled with LNG through the inlet pipe 14 to the inner vessel 11. The pressure taking port 15 is correspondingly provided with a liquid phase process pipeline of the liquid level meter 2 so as to measure and take pressure for the liquid level of the liquid level meter 2.

The level gauge 2 has process piping communicating the liquid phase space and the gas phase space of the inner vessel 11 for level measurement.

In the present embodiment, the liquid level meter 2 is specifically a differential pressure type liquid level meter 2 having a process piping communicating with the liquid phase and the gas in the inner vessel 11, i.e., the tank, and mainly including a liquid phase pressure taking pipe 21 communicating with the liquid phase space and a gas phase pressure taking pipe 22 communicating with the gas phase space. The working principle of the differential pressure type liquid level meter 2 is as follows: the liquid phase pressure sampling pipe 21 collects a pressure signal of the lowest liquid point at the bottom in the tank, and the gas phase pressure sampling pipe 22 collects a gas phase pressure signal at the top in the tank, so that the measured pressure difference value of the two points is the liquid column static pressure of the low-temperature liquid in the storage tank, and the liquid column static pressure is finally reflected on the liquid level display of the terminal through the liquid level meter 2 transmitter.

Referring to fig. 2, the liquid phase pressure tapping pipe 21 includes an inner liquid phase pipe section 211 extending into the inner container 11 through the pressure tapping port 15 and an outer liquid phase pipe section exposed from the inner container 11. Specifically, the liquid phase pressure tapping end 23 of the liquid phase inner pipe section 211 can collect the liquid pressure in the tank.

Correspondingly, referring to fig. 3, the gas phase pressure sampling pipe 22 also includes a gas phase inner pipe section 211 extending into the inner container 11 and a gas phase outer pipe section 212 located outside. The gas phase inner pipe section 211 also has a gas phase pressure tapping end 23 for collecting the gas phase pressure in the tank.

Referring to fig. 1 to 3, the anti-sloshing pipe 3 is a hollow pipe and is vertically disposed. The upper end of the anti-shaking pipe 3 is covered with the gas phase inner pipe section 211, and the lower end of the anti-shaking pipe is covered with the liquid phase inner pipe section 211, so that the liquid from the outside of the pipe is prevented from shaking.

The lower end of the anti-shaking pipe 3 surrounds the pressure tapping 15 and is welded and fixed with the bottom in the tank, so that the pressure tapping 15 is covered, and the pressure tapping 15 is isolated from liquid outside the pipe. When the pressure taking end 23 of the liquid phase inner pipe section 211 extends into the anti-shaking pipe 3 through the pressure taking port 15, the anti-shaking pipe 3 can resist the impact generated by shaking of liquid around the pipe for the pressure taking end 23, the liquid level stability of the pressure taking end 23 in the pipe is kept, and the liquid level display shaking caused by the shaking of the pressure taking end 23 is avoided.

Specifically, a liquid inlet hole 31 is formed in the wall of the right side of the anti-sloshing pipe 3, which is back to the liquid phase port 13. The liquid inlet holes 31 are as small and dense as possible. The purpose is as follows: in the liquid inlet process of filling, large-traffic and high-pressure LNG can impact and prevent shaking pipe 3 left side, and prevent shaking 3 right sides pipe walls of pipe and can avoid the direct impact of liquid. When the LNG liquid after leveling is through the feed liquor hole 31 on right side can slowly get into in preventing shaking pipe 3, impel the liquid level evenly to rise, do not receive outside to fill the influence.

The sleeve 4 is directed towards the upper end of the anti-sloshing pipe 3. The sleeve 4 is located in particular in the gas phase space inside the tank. The upper end periphery of the sleeve 4 is fixed on the tank top, and the lower end opening is used for the anti-shaking pipe 3 to enter. The diameter of the sleeve 4 is slightly larger than the diameter of the anti-sloshing pipe 3. When the sleeve 4 is sleeved on the top end of the anti-shaking pipe 3, a gap is formed between the sleeve 4 and the anti-shaking pipe 3 to form clearance fit. Therefore, the anti-shaking pipe 3 is connected with the inner container 11 by adopting a non-sealing sleeve, which is beneficial to the smooth entering of the liquid into the anti-shaking pipe 3.

Referring to fig. 3 again, the liquid blocking member 5 is suspended inside the anti-sloshing pipe 3 and is close to the bottom of the tank. The right side of the liquid blocking member 5 faces the liquid inlet hole 31, and the left side facing away from the liquid inlet hole 31 is arranged opposite to the pressure taking end 23. The liquid blocking member 5 can further prevent shaking caused by the liquid entering the inside of the sloshing preventing pipe 3.

In this embodiment, the liquid blocking member 5 is a hollow shell with an inverted cone shape, and has openings at its upper and lower ends. Specifically, the caliber of the liquid blocking member 5 is gradually reduced in the direction from top to bottom. Correspondingly, the caliber of the lower end opening of the liquid blocking piece 5 is smaller than that of the upper end opening thereof.

The size of the upper end opening of the liquid blocking piece 5 is matched with the inner diameter of the anti-shaking pipe 3, so that the upper end periphery of the liquid blocking piece 5 is matched and attached with the inner wall of the anti-shaking pipe 3, and the attaching position can be fully welded for one circle. Thus, the entire liquid blocking member 5 is suspended in the tube.

There is a gap between the outer circumference of the liquid blocking member 5 and the inner wall of the anti-sloshing pipe 3, and since the top of the gap is sealed by the liquid blocking member 5, gas can be stored in the gap to form a pressure measuring space 51. Above the pressure-taking space 51, there is a gas-forming chamber 511, and the gas chamber 511 is insoluble in water to isolate the liquid. When the pressure measuring end 23 is positioned on the left side of the outer wall of the liquid blocking member 5, the pressure measuring space 51 can ensure that the upper end opening of the pressure measuring end 23 is always positioned in the air chamber 511, and can prevent liquid from entering the liquid phase pressure measuring pipe 21 to form pressure fluctuation, so that the normal use of the liquid level meter 2 is influenced. Moreover, due to the pressure measuring space 51, the width of the liquid surface where the pressure measuring end 23 is located is further reduced, thereby reducing the influence of liquid shaking on accurate measurement of the liquid level meter 2.

It is noted that the lower end of the liquid blocking member 5 is approximately pointed, and naturally the opening of the pointed end is smaller to form a drainage port 52. The vents 52 function to: in addition to facilitating the introduction of fluids, it also prevents contaminants from entering the tube and blocking the vents 52. The caliber of the drainage port 52 is larger than the diameter of the liquid inlet hole 31 of the anti-shaking pipe 3; and the height of the drainage opening 52 is lower than that of the liquid inlet hole 31, or the drainage opening 52 and the liquid inlet hole 31 are positioned at the same height.

In practical use, such as filling, the flow direction of the liquid is indicated by an arrow, the liquid in the tank first flows into the anti-sloshing pipe 3 from the liquid inlet hole 31, the liquid level in the pipe begins to rise, once the liquid level is higher than the drainage port 52, the liquid bypasses the pressure taking space 51 and enters the interior of the liquid blocking member 5 only through the drainage port 52, and then gradually rises in the anti-sloshing pipe 3 to establish the liquid level.

In the process of ship transportation, once the ship is suddenly positioned at a large inclination angle, the liquid in the tank is instantly changed because the liquid is in a free state. However, the liquid in the anti-shaking pipe 3 needs to pass through the drainage port 52 and the liquid inlet hole 31 downwards and is slowly discharged into the tank to reach balance, so that the influence of the instantaneous change of the ship on the liquid level is reduced, and the stability of liquid level display is ensured.

In the present embodiment, the liquid blocking member 5 is a hollow shell having an inverted cone shape. In other embodiments, the liquid blocking member 5 may be an arc-shaped plate, the lower end of which is welded to the bottom of the tank, the arc-shaped opening of the plate faces the liquid inlet hole 31, and the pressure-taking end 23 faces away from the plate, so as to avoid the liquid from the liquid inlet hole 31 from impacting.

It should be noted that the liquid storage tank 100 according to the present embodiment is mainly applied to a ship, but the liquid storage tank 100 may be applied to a land cryogenic storage tank in consideration of the fact that the anti-sloshing pipe 3 can overcome the display sloshing caused during liquid filling.

To sum up, the utility model provides a pair of liquid storage tank 100 has following advantage and positive effect at least:

this liquid storage tank 100 has improved the liquid phase process pipeline structure about its level gauge 2, has specifically add and to have prevented that the liquid level that level gauge 2 got pressure department from rocking prevents shaking pipe 3 and hinder liquid spare 5 by a wide margin to avoid the demonstration of level gauge 2 to rock, make level gauge 2 can measure accuracy, reading accuracy, in order to guarantee the normal dress and the use of jar body.

First, the anti-sloshing pipe 3 is hollow and is covered at the pressure outlet 15. The anti-shaking pipe 3 isolates the pressure tapping 15 from liquid outside the pipe, so that the pressure tapping 15 is prevented from the impact generated by shaking of the liquid outside the pipe, the shaking of the liquid level at the pressure tapping 15 is avoided, and the pressure transient caused by the shaking of the liquid level at the pressure tapping 15 is avoided. Thus, when the pressure tapping end 23 of the liquid phase pressure tapping pipe 21 of the liquid level meter 2 can extend into the anti-shaking pipe 3 through the pressure tapping 15, the anti-shaking protection effect provided by the anti-shaking pipe 3 is obtained. And the liquid inlet hole 31 of the anti-sloshing pipe 3 is arranged on the pipe wall at one side back to the liquid phase port 13, so that the direct impact of the liquid in the filling process is avoided.

Then, the liquid blocking member 5 is provided inside the anti-sloshing pipe 3, which can further prevent sloshing caused by the liquid entering the interior of the anti-sloshing pipe 3. Specifically, the liquid blocking member 5 is located between the pressure taking end 23 and the liquid inlet hole 31 to separate the pressure taking end 23 and the liquid inlet hole 31. Liquid blocking piece 5 can withstand and weaken the impact of the liquid from liquid inlet hole 31 to reduce the shaking amplitude of the liquid level of pressure taking end 23 at the back, so that pressure taking end 23 can obtain accurate measurement values, and finally the liquid level value of liquid level meter 2 is in a stable display state. Foretell liquid storage tank 100 through the anti-shaking pipe 3 that sets up in the jar with hinder liquid piece 5, can prevent to show the condition of rocking at the level gauge 2 of the production of jar body in filling dress, use and transportation for the liquid level shows accurately, and the real time monitoring of the fluid reservoir of being convenient for has guaranteed the normal filling and use of fluid reservoir, has improved the fluid reservoir and has filled the efficiency with the use.

Second embodiment of a liquid storage tank

Referring to fig. 4, the present embodiment is different from the first embodiment in that: liquid blocking piece 5 is hollow cylinder structure, and liquid blocking piece 5 and anti-shaking pipe 3 are double-layer covers and are established in pressure taking port 15 department, and then provide the dual protection that keeps off liquid and rock for pressure taking end 23.

Specifically, the liquid blocking member 5 is a hollow cylinder having openings at its upper and lower ends. The lower end of the liquid resistance piece 5 surrounds the pressure taking port 15 and is fixedly arranged at the bottom in the tank. The peripheral wall of the liquid blocking piece 5 can be provided with a plurality of through holes 53, so that the liquid in the cover and the liquid in the pipe can flow mutually, and the liquid in the cover is prevented from being accumulated. Liquid phase pressure sampling pipe

The pressure taking end 23 of 21 can stretch into in the liquid blocking piece 5 through the pressure taking port 15, and the liquid blocking piece 5 further keeps apart pressure taking port 15 and the liquid that flows into the pipe, can support for the pressure taking end 23 and block the impact that comes from intraductal liquid all around and rock the production, has kept the liquid level of the pressure taking end 23 in the cover stable, has avoided pressure taking end 23 to rock the liquid level display that causes and has rocked.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A liquid storage tank, comprising:

a tank body for storing liquid therein; the bottom of the tank body is provided with a liquid phase port for liquid inlet and a pressure tapping port for liquid level measurement and tapping at intervals;

the anti-shaking pipe is vertically arranged in the tank body, the lower end of the anti-shaking pipe is fixedly arranged at the bottom of the inner wall of the tank body and surrounds the pressure taking port, and the upper end of the anti-shaking pipe is positioned in the gas phase space of the tank body; a liquid inlet hole is formed in the bottom of the pipe wall of one side, back to the liquid phase port, of the anti-sloshing pipe;

a liquid level meter having a liquid phase pressure tapping pipe; the pressure taking end of the liquid phase pressure taking pipe extends into the anti-sloshing pipe through the pressure taking port;

the liquid blocking piece is arranged in the anti-shaking pipe and is close to the pressure taking end; the liquid blocking piece is positioned between the pressure taking end and the liquid inlet hole so as to separate the pressure taking end from the liquid inlet hole.

2. The liquid storage tank of claim 1, wherein:

the liquid blocking piece is a hollow shell, and openings are formed in the upper end and the lower end of the liquid blocking piece;

the periphery of the upper end of the liquid blocking piece is fittingly attached to and hermetically connected with the inner peripheral wall of the anti-shaking pipe; a pressure taking space is formed between the outer peripheral wall of the liquid blocking piece and the inner wall of the bottom of the anti-shaking pipe; an air chamber is arranged above the pressure taking space;

the pressure measuring end is positioned in the pressure measuring space and is communicated with the air chamber.

3. The liquid storage tank of claim 2, wherein:

the pressure taking end and the liquid inlet hole are respectively arranged at two opposite sides of the anti-sloshing pipe in the circumferential direction.

4. The liquid storage tank of claim 2, wherein:

the liquid blocking piece is in an inverted cone shape, and the caliber of the liquid blocking piece is gradually reduced in the direction from top to bottom;

the caliber of the lower end opening of the liquid blocking piece is smaller than that of the upper end opening of the liquid blocking piece.

5. The liquid storage tank of claim 4, wherein:

the caliber of the lower end opening of the liquid blocking piece is larger than the diameter of the liquid inlet hole.

6. The liquid storage tank of claim 4, wherein:

the position of the lower end opening of the liquid blocking piece is not higher than the position of the liquid inlet hole.

7. The liquid storage tank of claim 4, wherein:

the lower end of the liquid blocking piece is in a pointed shape, and the lower end opening of the liquid blocking piece forms a drainage opening.

8. The liquid storage tank of claim 1, wherein:

the tank body also comprises a sleeve arranged at the top of the inner wall of the tank body;

the sleeve is positioned in the gas phase space inside the tank body; the upper end of the sleeve is fixedly connected with the inner wall, and the lower end of the sleeve is provided with an opening for the anti-shaking pipe to extend into; the sleeve and the anti-shaking pipe are in clearance fit.

9. The liquid storage tank of claim 8, wherein:

the liquid level meter is provided with a gas phase pressure sampling pipe;

and the pressure taking end of the gas phase pressure taking pipe extends into the anti-sloshing pipe to be communicated with the gas phase space.

10. The liquid storage tank of claim 1, wherein:

the liquid blocking piece is a hollow shell, and openings are formed in the upper end and the lower end of the liquid blocking piece; the periphery of the lower end of the liquid blocking piece surrounds the pressure taking port and is fixedly connected with the bottom of the inner wall of the tank body; the peripheral wall of the liquid blocking piece is provided with a through hole;

the pressure taking end can extend into the liquid blocking piece through the pressure taking port.