CN114949716B

CN114949716B - Constant-pressure detection mechanism and constant-pressure storage tank of liquid carbon dioxide fire prevention and extinguishing system

Info

Publication number: CN114949716B
Application number: CN202210033345.1A
Authority: CN
Inventors: 谭波; 王斐然; 王海燕
Original assignee: China University of Mining and Technology Beijing CUMTB; University of Science and Technology Beijing USTB
Current assignee: China University of Mining and Technology Beijing CUMTB; University of Science and Technology Beijing USTB
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-11-22
Anticipated expiration: 2042-01-12
Also published as: CN114949716A

Abstract

The application relates to the technical field of fire extinguishing apparatus and discloses a constant voltage detection mechanism and constant voltage storage tank of liquid carbon dioxide fire prevention and extinguishing system, wherein constant voltage detection mechanism, including the installation sleeve, be equipped with determine module in the installation sleeve, determine module's lower extreme is equipped with normally open valve, determine module contactability normally open valve makes it close. Through setting up above-mentioned constant voltage detection mechanism, when the pressure in the container is constant, first guide conical surface butt on the second guide conical surface, when reducing to certain pressure in the container, first guide conical surface breaks away from two guide conical surfaces, and the guide bar moves down and touches normally open valve and make it close, and pressure detection is more direct high-efficient.

Description

Constant-pressure detection mechanism and constant-pressure storage tank of liquid carbon dioxide fire prevention and extinguishing system

Technical Field

The application relates to the technical field of mine fire-extinguishing equipment, in particular to a constant-pressure detection mechanism and a constant-pressure storage tank of a liquid carbon dioxide fire-extinguishing system.

Background

The development of prevention and control means of coal fire disasters mainly centers on two aspects of oxygen reduction and temperature reduction, and in the field of new fire extinguishing technologies, the liquid carbon dioxide fire extinguishing technology has the characteristics of oxygen reduction, temperature reduction, explosion prevention and the like, has obvious effect on the prevention and control of coal fire disasters, and is popularized and applied in a plurality of coal mines. The existing liquid carbon dioxide fire extinguishing process on the market mainly utilizes the pressure difference between the inside and the outside of a storage tank to press liquid carbon dioxide into a goaf with hidden danger of spontaneous combustion of coal through a pipeline, so that the liquid carbon dioxide is utilized to vaporize, absorb heat and inert and suffocate to treat a fire area, but the process mainly has the following defects:

(1) When the pressure is less than 0.9MPa, the liquid carbon dioxide has a solidification phenomenon, so that the blocked pipeline can not work continuously;

(2) When the pressure is too low, the external vaporizer is usually used for vaporizing the liquid carbon dioxide and releasing the vaporized carbon dioxide to a hidden danger area, the fire extinguishing effect of the vaporized carbon dioxide is far lower than that of the liquid carbon dioxide, and the external vaporizer is large in size and inconvenient to install;

(3) The pressure change in the tank is unstable, which easily causes pulse liquid discharge and influences the stability of the transfusion state;

(4) The inside monitoring devices that do not have of jar body can not accurate judgement liquid carbon dioxide release condition.

(5) There is a risk of blocking the transfer ducts.

In view of the above-mentioned related art, the inventor has considered that it is necessary to provide a constant pressure detection mechanism, a constant pressure storage tank and a fire extinguishing system to solve the above-mentioned technical problems.

Disclosure of Invention

In order to guarantee liquid carbon dioxide's pressure as far as possible, reduce the risk of stifled pipe, this application provides a constant voltage detection mechanism, constant voltage storage tank and fire extinguishing systems.

First aspect, the application provides a liquid carbon dioxide fire prevention and extinguishing systems's constant voltage detection mechanism adopts following technical scheme:

the utility model provides a liquid carbon dioxide fire prevention and extinguishing systems's constant voltage detection mechanism, includes the installation sleeve, be equipped with determine module in the installation sleeve, determine module's lower extreme is equipped with normally open valve, determine module contactability normally open valve makes it close.

By adopting the technical scheme: the installation sleeve is as the installation carrier, can be with on other containers that need to detect pressure of whole constant voltage detection mechanism installation, wherein determine module is used for detecting container internal pressure, and when pressure was less than preset pressure, determine module triggered normally open valve and made it close.

Optionally, the detection assembly comprises a guide rod arranged in the installation sleeve, a first guide conical surface is arranged on the guide rod, and a second guide conical surface matched with the first guide conical surface is arranged in the installation sleeve.

By adopting the technical scheme: when the pressure in the container is constant, the first guide conical surface abuts against the second guide conical surface, when the pressure in the container is reduced to a certain pressure, the first guide conical surface is separated from the second guide conical surface, and the guide rod moves downwards to touch the normally open valve to close the normally open valve.

Optionally, a blocking body is arranged on the guide rod on the lower side of the first guide conical surface, the blocking body and the first guide conical surface are integrally formed on the guide rod, and a photoelectric sensor is arranged at the upper end of the guide rod.

By adopting the technical scheme: wherein the stifled body and the installation body inside wall sealing contact prevent that the interior liquid material of container from leaking away, and photoelectric sensor is used for responding to the position of guide bar.

Optionally, a limiting ring for limiting the guide rod is arranged inside the mounting sleeve, and a through hole is formed in the limiting ring.

By adopting the technical scheme: through spacing to the guide bar, make it only can move about for it is more accurate to detect, is full of the installation sleeve through the liquid that can make in the container, upwards promotes stifled body.

The application provides a constant pressure storage tank of liquid carbon dioxide fire prevention and extinguishing systems, adopts following technical scheme:

the utility model provides a liquid carbon dioxide fire prevention and extinguishing systems's constant voltage storage tank, includes a jar body, jar be equipped with inlet and liquid outlet on the body, its characterized in that: the one end of jar body be equipped with foretell constant voltage detection mechanism, still include the controller, photoelectric sensor is connected to the controller electricity.

By adopting the technical scheme: accessible inlet is to jar internal injection liquid carbon dioxide, can be with jar internal carbon dioxide discharge through the liquid outlet, sets up constant voltage detection mechanism on jar body, and the pressure value that detects jar internal liquid carbon dioxide that can be accurate whether reduces to predetermined minimum, when reducing to predetermined minimum, photoelectric sensor gives the controller with signal transmission, and the controller produces drive signal.

Optionally, the one end of the relative constant voltage detection mechanism on the jar body is equipped with mechanical pressure mechanism, and the one end of the constant voltage detection mechanism of the jar body is equipped with pneumatic pressure mechanism, the action of controller control mechanical pressure mechanism and pneumatic pressure mechanism.

By adopting the technical scheme: the drive signal that the controller produced controls the action of mechanical pressure mechanism, reduces the volume of the jar body, increases the internal pressure of jar, and pneumatic pressure mechanism is injected gaseous carbon dioxide into the jar body to the controller control simultaneously, carries out the pressure boost to the jar body, prevents that the liquid carbon dioxide in the jar body from freezing, causes the stifled pipe phenomenon.

Optionally, the mechanical pressurizing mechanism comprises a piston arranged in the tank body and a power part arranged outside the tank body and used for pushing the piston to act.

By adopting the technical scheme: the controller controls the power part to act, pushes the piston in the tank body to act, compresses the space in the tank body and pressurizes the tank body.

Optionally, a sealing ring is arranged between the outer ring side of the piston and the inner side wall of the tank body.

By adopting the technical scheme: through setting up the sealing ring, can prevent that the liquid carbon dioxide of compressed from leaking in the vacant space of the jar body, cause the negative influence to the pressure boost.

Optionally, the pneumatic pressurizing mechanism comprises a heating device communicated with the liquid outlet through a first pipeline, and the heating device is communicated with the tank body through a second pipeline.

By adopting the technical scheme: liquid carbon dioxide enters the heating device through the first pipeline and is vaporized into gaseous carbon dioxide, and the gaseous carbon dioxide enters the tank body to pressurize the tank body, so that the pressure in the tank body is ensured.

Optionally, the heating device comprises a box body, a rotating air distribution disc is arranged in the box body, and a heating ring piece is arranged on the inner side wall of the box body.

By adopting the technical scheme: the liquid carbon dioxide is dispersed into the box body through the gas distribution plate, and the liquid carbon dioxide is vaporized into gas under the heating action of the heating ring piece and is filled into the tank body to pressurize the tank body.

Optionally, divide the gas dish to rotate to be connected on pipeline one, be equipped with the driven piece in dividing the gas dish, divide fixedly connected with dwang on the gas dish, be equipped with the disturbance spray tube on the dwang.

By adopting the technical scheme: through the flow force of liquid carbon dioxide, the drive receives the movable piece to rotate, drives the dwang and rotates, and the air current in the disturbance spray tube disturbance box on the dwang for liquid carbon dioxide vaporization is more thorough, has improved the effect of pressure boost.

Optionally, the driven member includes a fixed shaft fixed in the air distribution plate and an impeller disposed on the fixed shaft.

By adopting the technical scheme: the liquid carbon dioxide drives the impeller to rotate, so that the rotation of the gas distribution plate and the rotation of the disturbance spray pipe are realized, and the disturbance of the airflow is realized.

Optionally, the dwang is inside cavity, and the lower extreme intercommunication of dwang divides the gas dish, and the upper portion of dwang communicates a plurality of disturbance spray tubes.

By adopting the technical scheme: one of the disturbance spray pipes can disturb the air flow, meanwhile, the hollow disturbance spray pipe can also spray liquid carbon dioxide, the air flow is formed after vaporization, and a plurality of air flows are crossed, so that the vaporization effect is better.

Optionally, the disturbance spray pipe is bent towards one side of the gas distribution plate.

By adopting the technical scheme: through setting up the disturbance spray tube of downwarping, disturbance spray tube spun air current forms the convection current with minute gas dish spun air current for vaporization effect is more excellent, is convenient for carry out high-efficient pressure boost to the jar body.

Optionally, a limiting convex ring for limiting the piston is arranged on the inner side of the tank body.

By adopting the technical scheme: through setting up spacing bulge loop, can prevent that the piston from removing transfinites, destroys members such as the internal constant voltage detection mechanism of installation of jar.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through setting up above-mentioned constant voltage detection mechanism, when the pressure in the container is constant, first guide conical surface butt on the second guide conical surface, when reducing to certain pressure in the container, first guide conical surface breaks away from the second guide conical surface, and the guide bar moves down and touches normally open valve and make it close, and pressure detection is more direct high-efficient.

2. The constant-pressure detection mechanism is arranged on the tank body, so that whether the pressure value of the liquid carbon dioxide in the tank body is reduced to a preset minimum value or not can be accurately detected, when the pressure value is reduced to the preset minimum value, the photoelectric sensor transmits a signal to the controller, and the controller generates a driving signal; the drive signal that the controller produced controls the action of mechanical pressure mechanism, reduces the volume of the jar body, increases the internal pressure of jar, and pneumatic pressure mechanism is injected gaseous carbon dioxide into the jar body to the controller control simultaneously, carries out the pressure boost to the jar body, prevents that the liquid carbon dioxide in the jar body from freezing, causes the stifled pipe phenomenon.

3. Through setting up heating device, in liquid carbon dioxide entered into heating device through pipeline one, the gasification becomes gaseous carbon dioxide, and gaseous carbon dioxide enters into jar internal pressurization to the jar body to guarantee the internal pressure of jar.

4. Through setting up the disturbance spray tube of downwarping, disturbance spray tube spun air current forms the convection current with minute gas dish spun air current for vaporization effect is more excellent, is convenient for carry out high-efficient pressure boost to the jar body.

5. The overall strength of the conveying pipeline can be enhanced by arranging the inner pipe and the outer pipe, and the overall toughness of the pipeline can be enhanced by arranging the elastic supporting pieces in the inner pipe and the outer pipe; meanwhile, the heat insulation material is arranged to prevent the pipe from being burst due to low temperature of the conveying pipeline.

Drawings

FIG. 1 is a schematic view of a constant pressure detecting mechanism according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the construction of the tank with the constant pressure detection mechanism of the present application;

FIG. 3 is a schematic structural diagram of a can body having a mechanical pressurization mechanism according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of the embodiment of the present application having a mechanical pressing mechanism and a pneumatic pressing mechanism;

FIG. 5 is a schematic structural diagram of a heating device according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a fire suppression system according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a conveying pipeline according to an embodiment of the present application.

Description of reference numerals: 100. installing a sleeve; 200. a detection component; 210. a guide bar; 220. a first guiding conical surface; 230. a second guiding conical surface; 240. a photosensor; 250. blocking the body; 260. a limiting ring; 261. a through hole; 270. a balancing weight; 300. a normally open valve; 400. a tank body; 410. a liquid inlet; 420. a liquid outlet; 430. a limit convex ring; 500. a controller; 600. a mechanical pressurization mechanism; 610. a piston; 620. a power member; 630. a seal ring; 700. a pneumatic pressurizing mechanism; 710. a first pipeline; 720. a heating device; 721. a box body; 722. a gas distribution disc; 723. heating the ring sheet; 730. a second pipeline; 740. a driven member; 741. a fixed shaft; 742. an impeller; 750. rotating the rod; 760. disturbing the spray pipe; 800. a delivery conduit; 810. an inner tube; 820. an outer tube; 830. a support member; 840. a thermal insulation material; 900. a jet pressure reducing valve; 1000. and (4) a manual valve.

Detailed Description

The present application is described in further detail below with reference to fig. 1-7, in which none of the moving parts of fig. 1-7 are shown in cross-section.

The embodiment of the application discloses liquid carbon dioxide fire prevention and extinguishing systems's constant voltage detection mechanism and constant voltage storage tank.

The method comprises the following specific steps:

first aspect, the constant voltage detection mechanism of liquid carbon dioxide fire prevention and extinguishing systems that this embodiment provided adopts following technical scheme:

referring to fig. 1, the constant pressure detection mechanism of the liquid carbon dioxide fire prevention and extinguishing system comprises a mounting sleeve 100, wherein the mounting sleeve 100 is tubular, the mounting sleeve 100 is used as a mounting carrier, the whole constant pressure detection mechanism can be mounted on other containers needing pressure detection, and the like, and the outer side wall of the constant pressure detection mechanism can be provided with external threads for facilitating the mounting of the constant pressure detection mechanism; in order to realize pressure detection, a detection assembly 200 is arranged in the mounting sleeve 100, a normally open valve 300 is arranged at the lower end of the detection assembly 200, and the detection assembly 200 can contact the normally open valve 300 to close. Wherein the detection assembly 200 is used for detecting the internal pressure of the container, and when the pressure is lower than the preset pressure, the detection assembly 200 triggers the normally open valve 300 to close.

Specifically, the detecting assembly 200 includes a guiding rod 210 disposed in the mounting sleeve 100, a first guiding conical surface 220 is disposed on the guiding rod 210, and a second guiding conical surface 230 matched with the first guiding conical surface 220 is disposed in the mounting sleeve 100. When the pressure in the container is constant, the first guiding conical surface 220 abuts on the second guiding conical surface 230, and when the pressure in the container is reduced to a certain pressure, the first guiding conical surface 220 is separated from the second guiding conical surface, and the guiding rod 210 moves downwards to touch the normally open valve 300 to close the normally open valve.

In order to prevent the liquid in the container from leaking, the blocking body 250 is provided on the guide rod 210 under the first guiding taper surface 220 in the present embodiment, the blocking body 250 is integrally formed with the first guiding taper surface 220 on the guide rod 210, and the upper end of the guide rod 210 is provided with the photoelectric sensor 240. Wherein the blocking body 250 is in sealing contact with the inner side wall of the installation tank body to prevent liquid substances in the container from leaking out, the photoelectric sensor 240 is used for sensing the position of the guide rod 210, and the photoelectric sensor 240 has a certain distance from the surface of the container during installation.

In order to limit the guide rod 210, a limiting ring 260 for limiting the guide rod 210 is provided inside the mounting sleeve 100, and a through hole 261 is provided in the limiting ring 260. By limiting the guide rod 210, the guide rod can only move up and down, so that the detection is more accurate, and the installation sleeve 100 can be filled with liquid in the container to push the blocking body 250 upwards.

The constant pressure storage tank of the liquid carbon dioxide fire prevention and extinguishing system provided by the embodiment adopts the following technical scheme:

referring to fig. 2-4, the constant pressure storage tank of the liquid carbon dioxide fire prevention and extinguishing system comprises a tank body 400, wherein a liquid inlet 410 and a liquid outlet 420 are arranged on the tank body 400, manual valves 1000 are arranged at the liquid inlet 410 and the liquid outlet 420, the constant pressure detection mechanism is arranged at one end of the tank body 400, and the constant pressure storage tank further comprises a controller 500, and the controller 500 is electrically connected with the photoelectric sensor 240.

Wherein, the liquid carbon dioxide of accessible inlet 410 is injected into jar body 400, can discharge the carbon dioxide in jar body 400 through liquid outlet 420, set up constant voltage detection mechanism on jar body 400, can be accurate detect jar body 400 in the liquid carbon dioxide the pressure value reduce to predetermined minimum, when reducing to predetermined minimum, guide bar 210 descends, photoelectric sensor 240 senses the container body and gives controller 500 with signal transmission, controller 500 produces drive signal, in order to detect specific pressure, be provided with corresponding balancing weight 270 on guide bar 210.

In order to pressurize the tank 400, a mechanical pressurizing mechanism 600 is disposed at one end of the tank 400 opposite to the constant pressure detecting mechanism, a pneumatic pressurizing mechanism 700 is disposed at one end of the constant pressure detecting mechanism of the tank 400, and the controller 500 controls the mechanical pressurizing mechanism 600 and the pneumatic pressurizing mechanism 700 to operate. The driving signal generated by the controller 500 controls the mechanical pressurizing mechanism 600 to act, so as to reduce the volume of the tank 400 and increase the pressure in the tank 400, and meanwhile, the controller 500 controls the pneumatic pressurizing mechanism 700 to inject gaseous carbon dioxide into the tank 400 to pressurize the tank 400, so that the phenomenon of pipe blockage caused by icing of liquid carbon dioxide in the tank 400 is prevented.

Specifically, the mechanical pressurization mechanism 600 includes a piston 610 disposed inside the tank 400, and a power member 620 disposed outside the tank 400 for pushing the piston 610 to operate. The controller 500 controls the power element 620 to act, so as to push the piston 610 in the tank 400 to act, compress the space in the tank 400 and pressurize the tank 400, wherein the power element 620 can electrically extend and retract the rod, and the controller 500 controls the cylinder to act.

In order to realize the spatial isolation and facilitate pressurization of the tank 400, a sealing ring 630 is disposed between the outer circumferential side of the piston 610 and the inner circumferential side of the tank 400. By providing the sealing ring 630, the compressed liquid carbon dioxide can be prevented from leaking into the empty space of the tank 400, which may negatively affect the pressurization.

Referring to fig. 5, in order to further pressurize the tank 400, the pneumatic pressurizing mechanism 700 includes a heating device 720 communicated with the liquid outlet 420 through a first pipe 710, and the heating device 720 is communicated with the tank 400 through a second pipe 730; the liquid carbon dioxide enters the heating device 720 through the first pipe 710, is vaporized into gaseous carbon dioxide, and the gaseous carbon dioxide enters the tank 400 to pressurize the tank 400, so that the pressure in the tank 400 is ensured.

Specifically, the heating device 720 includes a box body 721, a rotating air distribution plate 722 is arranged in the box body 721, and a heating ring 723 is arranged on the inner side wall of the box body 721. The liquid carbon dioxide is dispersed into the tank 721 through the gas distribution plate 722, and under the heating action of the heating ring 723, the liquid carbon dioxide is vaporized into a gas state and is filled into the tank 400 to pressurize the tank 400.

The air distribution disc 722 is rotatably connected to the first pipeline 710, a driven part 740 is arranged in the air distribution disc 722, a rotating rod 750 is fixedly connected to the air distribution disc 722, and a disturbance spray pipe 760 is arranged on the rotating rod 750. Through the flow force of liquid carbon dioxide, the driven part 740 is driven to rotate, the rotating rod 750 is driven to rotate, and the disturbance spray pipe 760 on the rotating rod 750 disturbs the airflow in the box body 721, so that the liquid carbon dioxide is vaporized more thoroughly, and the pressurization effect is improved.

Specifically, the driven member 740 includes a fixed shaft 741 fixed in the air distributor 722 and an impeller 742 provided on the fixed shaft 741. The liquid carbon dioxide drives the impeller 742 to rotate, so that the air distribution plate 722 and the disturbance nozzle 760 rotate, and the air flow is disturbed.

Specifically, the rotating rod 750 is hollow, the lower end of the rotating rod 750 is communicated with the air distribution disc 722, and the upper portion of the rotating rod 750 is communicated with the plurality of disturbance nozzles 760. The first disturbing spray pipe 760 can disturb the air flow, meanwhile, the hollow disturbing spray pipe 760 can spray liquid carbon dioxide, the air flow is formed after vaporization, and a plurality of air flows are crossed, so that the vaporization effect is better.

Specifically, the disturbance nozzle 760 is curved toward the air distributor 722. Through the arrangement of the disturbance spray pipe 760 which is bent downwards, the air flow sprayed out of the disturbance spray pipe 760 and the air flow sprayed out of the air distribution plate 722 form convection, so that the vaporization effect is better, and the efficient pressurization of the tank body 400 is facilitated.

In order to limit the piston 610, a limiting convex ring 430 for limiting the piston 610 is arranged on the inner side of the tank 400. By providing the limit protrusion ring 430, the movement of the piston 610 can be prevented from exceeding the limit, and a constant pressure detection mechanism and other members installed in the tank 400 can be prevented from being damaged.

In a third aspect, the fire extinguishing system provided by this embodiment adopts the following technical solutions:

referring to fig. 6, the fire extinguishing system comprises the constant pressure storage tank and a delivery pipe 800 connected with the tank 400, wherein the delivery pipe 800 is communicated with a jet pressure reducing valve 900. The liquid carbon dioxide in the tank 400 is delivered to the jet pressure reducing valve 900, and the gaseous carbon dioxide is sprayed out through the jet pressure reducing valve 900, so that the temperature and the oxygen concentration of a fire area are reduced, and the fire is extinguished.

Referring to fig. 7, specifically, a manual valve 1000 is disposed on the conveying pipeline 800, the conveying pipeline 800 includes an inner pipe 810 and an outer pipe 820, a support 830 is disposed between the inner pipe 810 and the outer pipe 820, and a thermal insulation material 840 is filled between the outer pipe 820 and the inner pipe 810. The overall strength of the conveying pipeline 800 can be enhanced by the arrangement of the inner pipe 810 and the outer pipe 820, and the overall toughness of the pipeline can be enhanced by the arrangement of the elastic support 830 in the inner pipe 810 and the outer pipe 820; meanwhile, the heat insulation material 840 is arranged to prevent the pipe explosion of the conveying pipeline 800 due to low temperature.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a liquid carbon dioxide fire prevention and extinguishing systems's constant voltage detection mechanism which characterized in that: including installation sleeve (100), be equipped with detection module (200) in installation sleeve (100), the lower extreme of detection module (200) is equipped with normally open valve (300), detection module (200) contactability normally open valve (300) make it close, detection module (200) is including setting up guide bar (210) in installation sleeve (100), be equipped with first guide conical surface (220) on guide bar (210), be equipped with in installation sleeve (100) with first guide conical surface (220) complex second guide conical surface (230), the upper end of guide bar (210) is equipped with photoelectric sensor (240), be equipped with on guide bar (210) of first guide conical surface (220) downside stifled body (250), stifled body (250) and first guide conical surface (220) integrated into one piece set up on guide bar (210).

2. The constant pressure detection mechanism of a liquid carbon dioxide fire prevention and extinguishing system according to claim 1, characterized in that: the inside of installation sleeve (100) is equipped with spacing collar (260) that carry out spacing to guide bar (210), be equipped with through-hole (261) on spacing collar (260).

3. The utility model provides a liquid carbon dioxide fire prevention and extinguishing systems's constant voltage storage tank, includes a jar body (400), be equipped with inlet (410) and liquid outlet (420) on jar body (400), its characterized in that: the constant pressure detection mechanism of any one of claims 1 to 2 is arranged at one end of the tank body (400), the constant pressure detection mechanism further comprises a controller (500), the controller (500) is electrically connected with the photoelectric sensor (240), a mechanical pressurization mechanism (600) is arranged at one end, opposite to the constant pressure detection mechanism, of the tank body (400), a pneumatic pressurization mechanism (700) is arranged at one end of the constant pressure detection mechanism of the tank body (400), the controller (500) controls the mechanical pressurization mechanism (600) and the pneumatic pressurization mechanism (700) to act, the pneumatic pressurization mechanism (700) comprises a heating device (720) communicated with the liquid outlet (420) through a first pipeline (710), heating device (720) is through pipeline two (730) intercommunication jar body (400), heating device (720) includes box (721), be equipped with pivoted minute gas dish (722) in box (721), box (721) inside wall is equipped with heating ring piece (723), minute gas dish (722) rotate to be connected on pipeline one (710), be equipped with driven piece (740) in minute gas dish (722), fixedly connected with dwang (750) on minute gas dish (722), be equipped with disturbance spray tube (760) on dwang (750), driven piece (740) is including fixed axle (741) and the impeller (741) of setting on fixed axle (741) of fixing in minute gas dish (722) 742 Anda hollow inside the rotating rod (750), wherein the lower end of the rotating rod (750) is communicated with the gas distribution disc (722), and the upper part of the rotating rod (750) is communicated with a plurality of disturbance spray pipes (760).

4. The constant pressure storage tank of a liquid carbon dioxide fire prevention and extinguishing system according to claim 3, characterized in that: the mechanical pressurization mechanism (600) comprises a piston (610) arranged in the tank body (400) and a power piece (620) arranged on the inner side of the tank body (400) and used for pushing the piston (610) to act.

5. The constant pressure storage tank of a liquid carbon dioxide fire prevention and extinguishing system according to claim 4, wherein: and a sealing ring (630) is arranged between the outer ring side of the piston (610) and the inner side wall of the tank body (400).

6. The constant pressure storage tank of a liquid carbon dioxide fire prevention and extinguishing system according to claim 5, wherein: the disturbance spray pipe (760) is bent towards one side of the gas distribution plate (722).

7. The constant pressure tank of a liquid carbon dioxide fire prevention and extinguishing system according to any one of claims 3 to 6, wherein: the inner side of the tank body (400) is provided with a limit convex ring (430) for limiting the piston (610).