CN114427618A - All-weather burning-resistant breather valve device - Google Patents

Abstract

The invention provides an all-weather burning-resistant breather valve device, which comprises: a main valve body; the burning-resistant fire-retardant component is arranged at the opening at the upper end of the main valve body; the pressure valve is formed in the main valve body, and a pressure valve air chamber and a common air chamber are respectively formed on the upper side and the lower side of the pressure valve; the vacuum valve is arranged in the common air chamber and is fixedly connected to the side wall of the main valve body, the vacuum valve comprises a vacuum valve air chamber, and a detonation fire-resisting disc is arranged on the side part of the vacuum valve body; wherein, the all-weather is able to bear or endure the fire breather valve device and constructs to be able to open the pressure valve when the internal gas pressure of storage tank surpasses the predetermined pressure of pressure valve, make the internal gas of storage tank get into common air chamber in proper order, the pressure valve air chamber, and then discharge through the fire-resistant back-fire relief subassembly of nai burning, and can be in the storage tank when gas is the negative pressure and is less than the predetermined pressure of vacuum valve, open the vacuum valve, make outside air inhale the vacuum valve air chamber from the detonation back-fire relief dish, and then get into common air chamber in order to get into the storage tank through the vacuum valve, thereby replenish storage tank gas pressure.

Description

All-weather burning-resistant breather valve device

Cross reference to related art

The present application claims priority to chinese patent application CN 202011010005.4 entitled "an all weather and fire resistant breather valve for a tank" filed on 23/9/2020, which is incorporated herein by reference in its entirety.

Technical Field

The invention belongs to the technical field of storage tank safety devices, and particularly relates to an all-weather burning-resistant breather valve device. In particular to an all-weather burning-resistant breather valve device for a storage tank.

Background

The breather valve is one of the safety accessories of the storage tank, and the function of the breather valve is to reduce the evaporation loss of volatile liquid in the normal-pressure and low-pressure storage tanks. The breather valve not only can maintain the air pressure balance in the tank, ensure that the storage tank is prevented from being damaged when the storage tank is in overpressure and negative pressure, but also can reduce the volatilization and the loss of a medium in the storage tank by utilizing the bearing capacity of the storage tank, and has important effects on safety and environmental protection.

Under normal working conditions, the breather valve starts to suck air into the tank when the storage tank outputs materials outwards; when materials are filled into the storage tank, the breathing valve starts to exhale the gas in the tank out of the tank; the vapor pressure of the materials in the tank is increased or decreased due to climate change and the like, and the breathing valve exhales vapor or inhales air or nitrogen. Under an abnormal working condition, when a fire disaster happens, the evaporation capacity of liquid in the storage tank is increased sharply due to heating of the storage tank, and the breathing valve begins to breathe out of the tank, so that the storage tank is prevented from being damaged due to overpressure; under other working conditions, such as the pressurized delivery of volatile liquid, the chemical reaction of the internal and external heat transfer devices, misoperation and the like, the breathing valve exhales or inhales so as to avoid the storage tank from being damaged due to overpressure or ultra-vacuum. Meanwhile, in case that the breather valve catches fire due to lightning strike when the breather valve exhales outside the tank, materials exhaled by the breather valve can be continuously combusted. In the traditional concept, the flame arrester or the fire-resisting disc has a burning-resistant function, and German PTB respectively carries out burning-resistant experiments on the pipeline detonation flame arrester according to the USCG standard and the vertical and horizontal installation positions (the tail end of the flame arrester directly faces the atmosphere), and finds that the common flame arrester is burning-resistant for no more than 30 minutes at most, but according to the international standard, the burning-resistant time of the all-weather breather valve is not less than 2 hours. Therefore, the common breather valve added with the common flame arrester cannot meet the international standard of burning resistance for 2 hours, and the products are blank at home and are not applied yet.

At present, the breather valve at the top of the storage tank is used domestically, so that great potential safety hazards exist, and the all-weather burning-resistant breather valve capable of solving the potential safety hazards and meeting the requirements of safety and environmental protection is urgently needed to guarantee personal and property safety.

Disclosure of Invention

In view of the above technical problems, the present invention is directed to provide an all-weather fire-resistant breather valve device, which can significantly improve fire-resistant and fire-retardant performance, thereby effectively preventing flame and high temperature from being transmitted into a storage tank, preventing explosion and fire, and being very beneficial to ensuring the safety of a tank area.

To this end, according to the invention there is provided an all weather, burn resistant breathing valve device comprising: a main valve body configured in a cylindrical shape; the burning-resistant fire-retardant component is arranged at an opening at the upper end of the main valve body; the pressure valve is formed in the main valve body, and a pressure valve air chamber and a common air chamber are respectively formed on the upper side and the lower side of the pressure valve; the vacuum valve is arranged in the common air chamber and fixedly connected to the side wall of the main valve body, the vacuum valve comprises a vacuum valve air chamber, and a detonation fire-resisting disc is arranged on the side part of the valve body of the vacuum valve; the all-weather burning-resistant breather valve device is constructed to be capable of opening the pressure valve when the gas pressure in the storage tank exceeds the preset pressure of the pressure valve, so that the gas in the storage tank sequentially enters the common air chamber and the pressure valve air chamber and then is discharged through the burning-resistant fire retardant assembly, and the vacuum valve is opened when the gas in the storage tank is negative pressure and is lower than the preset pressure of the vacuum valve, so that the external air is sucked into the vacuum valve air chamber from the detonation fire retardant disc, and then enters the common air chamber through the vacuum valve to enter the storage tank, thereby supplementing the gas pressure of the storage tank.

In one embodiment, the pressure valve comprises a separation plate fixedly connected with the side wall of the main valve body and a pressure valve disc arranged on the separation plate, the pressure valve air chamber and the common air chamber are respectively formed at the upper side and the lower side of the separation plate, a first through hole is formed in the middle of the separation plate, the pressure valve disc is correspondingly arranged at the first through hole, and the pressure valve disc can block the first through hole to close the pressure valve and can be lifted to open the pressure valve.

In one embodiment, a lifting sleeve assembly is connected between the pressure valve disc and the burning-resistant fire-retardant assembly, the lifting sleeve assembly comprises a sleeve and a pressure valve rod which is installed in the sleeve in a matching mode, the pressure valve rod is fixedly connected with the pressure valve disc, the sleeve is fixedly connected to the lower end of the burning-resistant fire-retardant assembly, and the pressure valve rod can move up and down along the sleeve.

In one embodiment, an annular wedge-shaped pressure valve seat is arranged in the first through hole, the wedge-shaped pressure valve seat is in interference fit with the first through hole, and the surface roughness of the bottom surface of the pressure valve disk is less than 10 microns, so that the bottom surface of the pressure valve disk can be in close contact with the top surface of the wedge-shaped pressure valve seat to form a seal.

In one embodiment, the vacuum valve comprises a vacuum valve body, the vacuum valve air chamber is formed inside the vacuum valve body, the upper end of the vacuum valve body is provided with a second through hole, a vacuum valve disc is arranged at the second through hole, and the vacuum valve disc can block the second through hole to close the vacuum valve and can be lifted to open the vacuum valve.

In one embodiment, a vacuum valve rod is fixed at the lower end of the vacuum valve disc, a limiting vacuum valve rod sleeve is fixed on the inner wall of the vacuum valve body, and the vacuum valve rod is fittingly installed in the limiting vacuum valve rod sleeve and can move up and down along the limiting vacuum valve rod sleeve.

In one embodiment, an annular wedge-shaped vacuum valve seat is arranged in the second through hole, the wedge-shaped vacuum valve seat is in interference fit with the second through hole, and the surface roughness of the bottom surface of the vacuum valve disk is less than 10 microns, so that the bottom surface of the vacuum valve disk can be in close contact with the top surface of the wedge-shaped vacuum valve seat to form a seal.

In one embodiment, a first groove is formed in the side portion of the vacuum valve body, the detonation fire retardant disc is fixedly installed in the first groove, and a first rain-proof cover is arranged on the outer side of the detonation fire retardant disc assembly.

In one embodiment, the fire resistant and fire retardant assembly comprises a thermal insulation layer and a fire resistant and fire retardant disc, the thermal insulation layer is arranged below the fire resistant and fire retardant disc, a second groove is arranged at the upper end of the main valve body, and the fire resistant and fire retardant assembly is fixedly installed in the second groove.

In one embodiment, a second rain cover is arranged above the burning-resistant and fire-retardant component, the second rain cover can continuously burn within 5 minutes to completely burn out when a fire occurs, and the burning-resistant and fire-retardant component can continuously resist burning for at least 2 hours.

Compared with the prior art, the method has the advantages that:

the all-weather burning-resistant breather valve device can continuously resist burning for more than 2 hours under the condition of fire through the fire retardant disc component, thereby effectively avoiding the transmission of flame and high temperature to the inside of the storage tank, preventing the occurrence of explosion and fire and ensuring the safety of a tank area. This all-weather resistant breather valve device still has explosion-proof detonation performance, through the lateral wall at the main valve body be equipped with the detonation of the vacuum valve cavity intercommunication of vacuum valve hinder the fire dish, in can effectively preventing that the outer conflagration of storage tank or when exploding flame pass through the vacuum valve air chamber and get into the storage tank, be favorable to guaranteeing the safety of storage tank very much, and through can avoid the detonation to hinder the reduction of fire dish back-fire relief area and prevent the increase of detonation back-fire dish pressure drop through the first rain-proof cover of installation outside the detonation hinders the fire dish. And, this all-weather resistant breather valve device of burning upwards sets up through the gas outlet with the pressure valve perpendicularly, thereby will breathe a set of structure setting at the top, the rain-proof cover of second can burn out totally in five minutes, thereby thermal quick diffusion when realizing the breather valve burning, make the flame heat of breather valve exit can be taken away rapidly by the ambient air, avoid the heat to gather, reduce heat transfer to back-fire relief dish subassembly, prevented the emergence of explosion conflagration, further ensured the safety in tank field. In addition, all-weather resistant breathing valve device of burning is through setting up vacuum valve and pressure valve with the axle center, can avoid the inside air current disturbance of breathing valve to bring the unstable harm of breathing valve vibration, reduces the breathing valve volumn simultaneously and lightens breathing valve weight, alleviates the heavy burden at storage tank top, avoids the risk that the storage tank top collapses.

Drawings

The invention will now be described with reference to the accompanying drawings.

FIG. 1 shows the structure of an all-weather, burn-resistant breather valve assembly according to the present invention.

Fig. 2 shows the structure of the testing device of the all-weather burning-resistant breather valve.

In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.

Detailed Description

The invention is described below with reference to the accompanying drawings.

In the present application, it is to be noted that directional terms or qualifiers "upper end", "lower end", and the like used in the present application are all referred to the attached fig. 1. They are not intended to limit the absolute positions of the parts involved, but may vary from case to case.

FIG. 1 shows the structure of an all-weather, burn-resistant respiratory valve apparatus 100 according to the present invention. As shown in fig. 1, the all-weather burn-resistant breather valve apparatus 100 includes a main valve body 4, a burn-resistant fire-arresting component 30, a pressure valve 40 formed inside the main valve body 4, a vacuum valve 50 disposed inside the main valve body 4, and a detonation-arresting disk 21. The main valve body 4 is configured in a cylindrical shape, and the upper and lower ends are provided as vertical openings, and the side wall is provided with a lateral opening. The burning-resistant fire-retardant component 30 is arranged at the opening at the upper end of the main valve body 4, and the detonation fire-retardant disc 21 is arranged at the lateral opening. The lower end of the main valve body 4 is designed as a media-side flange 1 for connection to a tank outlet (not shown). The pressure valve 40 is fixed on the inner wall of the main valve body 4 so as to divide the inner space of the main valve body 4 into the pressure valve air chamber 14 and the common air chamber 3, and the pressure valve air chamber 14 is located at the upper end of the pressure valve 40 and the common air chamber 3 is located at the lower end of the pressure valve 40. The vacuum valve 50 is arranged in the common air chamber 3, and the vacuum valve 50 includes a vacuum valve body in which a vacuum valve air chamber 5 is formed. One side (right side in fig. 1) of the vacuum valve body is fixedly connected to the inner wall of the main valve body 4, and is formed as a lateral opening. A detonation arresting disc 21 is mounted in the lateral opening.

In practical application, when the pressure of the gas in the storage tank exceeds the predetermined pressure of the pressure valve 40, the all-weather burning-resistant breather valve device 100 can automatically open the pressure valve 40, so that the gas in the storage tank enters the common air chamber 3, enters the pressure valve air chamber 14 through the pressure valve 40, and is discharged to the atmosphere through the burning-resistant fire retardant assembly 30, and therefore the storage tank can be effectively prevented from bulging. When the gas in the storage tank is negative pressure and lower than the predetermined pressure of the vacuum valve 50, the all-weather burning-resistant breather valve device 100 can open the vacuum valve 50, so that the external air is sucked into the vacuum valve air chamber 5 from the detonation fire-resistant disc 21, then enters the common air chamber 3 through the vacuum valve 50, and then enters the storage tank through the breather valve port 2 at the lower end of the main valve body 4 and the medium side flange 1, thereby supplementing the gas pressure of the storage tank, and thus effectively preventing the storage tank from being empty and flat. Therefore, when the pressure of the storage tank exceeds the expiratory pressure, the all-weather burn-resistant breathing valve device 100 automatically exhales the gas in the storage tank, and when the pressure of the storage tank is lower than the inspiratory pressure, the all-weather burn-resistant breathing valve device 100 automatically inhales the air into the storage tank.

The diameter of the medium side flange 1 is related to the volume of the storage tank and the respiratory gas amount in unit time, and can be set according to actual needs.

According to the invention, as shown in fig. 1, the pressure valve 40 comprises a partition plate 10 and a pressure valve disk 12. The partition plate 10 is circular and is fixedly connected to the inner side wall surface of the main valve body 4, and the pressure valve air chamber 14 and the common air chamber 3 are formed on the upper and lower sides of the partition plate 10, respectively. A first through hole 101 is provided in the middle of the partition plate 10, and the pressure valve disc 12 is arranged on the partition plate 10 corresponding to the position of the first through hole 101. Under normal operating conditions, the pressure valve disk 12 is able to close the first through hole 101 and close the pressure valve 40 under its own weight, and to lift up and open the first through hole 101 when the pressure in the tank reaches a predetermined value, thereby opening the pressure valve 40.

As shown in fig. 1, a lifting sleeve assembly is connected between the pressure valve disc 12 and the burn-resistant flame retardant assembly 30. The lifting sleeve component comprises a sleeve 15 and a pressure valve rod 13 which is installed in the sleeve 15 in an adaptive mode, the pressure valve rod 13 is fixedly connected with a pressure valve disc 12, the sleeve 15 is fixedly connected to the lower end face of a heat insulation layer 16 in the burning-resistant fire-retardant component 30, and the pressure valve rod 13 can move up and down along the sleeve 15. A pressure valve rod 13 is arranged above the center of the pressure valve disk 12, and the pressure valve rod 13 is connected with the pressure valve disk 12 through threads. The diameter of the rod body of the pressure valve rod 13 is 1mm smaller than the inner diameter of the sleeve 15. The sleeve 15 is positioned right below the center of the heat insulation layer 16, and the sleeve 15 is installed on the bottom surface of the heat insulation layer 16 through threaded connection.

In one embodiment, an annular wedge-shaped pressure valve seat 11 is provided in the first through hole 101, and the wedge-shaped pressure valve seat 11 is in interference fit with the first through hole 101.

When the pressure in the storage tank is normal, the pressure valve disc 12 is pressed on the wedge-shaped pressure valve seat 11 by means of the gravity of the pressure valve disc 12, the bottom surface of the pressure valve disc 12 is polished to be smooth, the surface roughness of the bottom surface of the pressure valve disc 12 is smaller than 10 micrometers, the bottom surface of the pressure valve disc 12 is in close contact with the top surface of the wedge-shaped pressure valve seat 11 to form efficient sealing, and it is ensured that no gas leaks when the pressure of the storage tank and the sealing surface of the wedge-shaped pressure valve seat 11 are lower than the take-off pressure of the pressure valve disc 12.

When the gas in the tank is positive pressure and is higher than the take-off pressure of the pressure valve disc 12 (the preset pressure of the pressure valve 40), the pressure valve disc 12 rises upwards, the pressure valve rod 13 also rises upwards, the pressure valve disc 12 cannot rise continuously as the top end of the pressure valve rod 13 cannot penetrate through the sleeve 15, and the maximum height of the pressure valve disc 12 is called the maximum take-off height of the pressure valve disc 12. At this moment, open first through-hole 101, the gaseous common air chamber 3 of storage tank internal gas to through first through-hole 101 admission pressure valve air chamber 14, and then through the resistant fire retardance subassembly 30 of burning discharge to the atmosphere, thereby can effectively prevent the storage tank bulging.

When the pressure in the storage tank is lower than the recoil pressure of the pressure valve disc 12, the pressure valve disc 12 falls back to the wedge-shaped pressure valve seat 11 from the maximum takeoff height, and the bottom surface of the pressure valve disc 12 and the top surface of the wedge-shaped pressure valve seat 11 form an efficient seal again.

According to the present invention, as shown in fig. 1, the vacuum valve 50 includes a vacuum valve body, a vacuum valve air chamber 5 is formed inside the vacuum valve body, a second through hole 51 is formed at an upper end of the vacuum valve body, and a vacuum valve disk 9 is provided at the second through hole 51. In a normal working state, the vacuum valve disc 9 can block the second through hole 51 to close the vacuum valve 50 under the action of its own weight, and can lift up to open the vacuum valve 50, and lift up to open the second through hole 51 when the gas in the storage tank is at a negative pressure and lower than a predetermined pressure of the vacuum valve 50, thereby opening the vacuum valve 50.

As shown in fig. 1, one side (right side in fig. 1) of the vacuum valve body of the vacuum valve 50 is fixedly connected to the inner wall of the main valve body 4, and is formed to be laterally open. A first groove is formed in the side portion of the valve body of the vacuum valve, the lateral opening is communicated with the first groove, the detonation fire-resisting disc 21 is installed in the first groove, and the detonation fire-resisting disc 21 is fixed on the inner wall of the air chamber 5 of the vacuum valve through a bolt. . A first rain shield 22 is provided on the outside of the detonation spark tray assembly 21. In one embodiment, the detonation suppressant disk 21 is stainless steel. The detonation fire-resisting disk 21 is mainly used for preventing flame from entering the storage tank through the vacuum valve air chamber 5 when fire disaster or explosion happens outside the storage tank, and the safety of the storage tank is guaranteed.

According to the invention, a first rain shield 22 is provided laterally outside the detonation arrester disc 21. The first rain shield 22 may be made of plastic or aluminum sheet, for example.

In one embodiment, the first rain cover 22 may be fixedly mounted on the outer wall of the main valve body 4 by a fixing bolt 21. Form the combustion space between first rain-proof cover 22 and detonation fire disk 21, form the annular export between the side of first rain-proof cover 22 and main valve body 4, the combustion space is through annular export and atmosphere intercommunication. First rain-proof cover 22 can prevent effectively that rainwater, insect and dust from getting into in the gap of resistant burning fire disc 17, and first rain-proof cover 22 can avoid the detonation to hinder reduction of fire disc 21 back-fire area and prevent the detonation to hinder the increase of disc 21 pressure drop. First rain-proof cover 22 can burn out totally in five minutes of burning to thermal quick diffusion when realizing resistant breather valve burning, make the heat of burning flame can be taken away rapidly by surrounding air, thereby effectively avoid the heat to gather.

The lower end of the vacuum valve disc 9 is fixed with a vacuum valve rod 6, the inner wall of the valve body of the vacuum valve is fixed with a limit vacuum valve rod sleeve 7, and the vacuum valve rod 6 is installed in the limit vacuum valve rod sleeve 7 in an adaptive mode and can move up and down along the limit vacuum valve rod sleeve 7. In one embodiment, the limiting vacuum valve stem sleeve 7 is welded to the side wall of the vacuum valve body. For example, a support rod is fixed on the inner wall of the valve body of the vacuum valve, the support rod horizontally extends to the central position of the air chamber 5 of the vacuum valve, and a limiting vacuum valve rod sleeve 7 is fixedly arranged on the support plate.

In this embodiment, the diameter of the rod body of the vacuum valve rod 6 is smaller than the inner diameter of the limiting vacuum valve rod sleeve 7 by 1mm, the vacuum valve rod 6 penetrates through the limiting vacuum valve rod sleeve 7 to be in threaded connection with the vacuum valve disk 6, the flat-head nut is arranged at the bottom end of the vacuum valve rod 6, and the diameter of the flat-head nut of the vacuum valve rod 6 is larger than the inner diameter of the limiting vacuum valve rod sleeve 7 by 10 mm.

In one embodiment, an annular wedge-shaped vacuum valve seat 8 is provided in the second through hole 51, the wedge-shaped vacuum valve seat 8 being in interference fit with the second through hole 51.

When the pressure in the storage tank is normal, the vacuum valve disc 9 is pressed on the wedge-shaped vacuum valve seat 8 by means of the gravity of the vacuum valve disc 9, the bottom surface of the vacuum valve disc 9 is polished to be very smooth, the surface roughness of the bottom surface of the vacuum valve disc 9 is smaller than 10 micrometers, the bottom surface of the vacuum valve disc 9 is in close contact with the top surface of the wedge-shaped vacuum valve seat 8 to form efficient sealing, and gas leakage is effectively avoided when the pressure of the sealing surface of the vacuum valve disc 9 and the wedge-shaped vacuum valve seat 8 is higher than the take-off pressure of the vacuum valve disc 9.

When the gas in the storage tank is negative pressure and is lower than the take-off pressure of the vacuum valve disc 9 (the preset pressure of the vacuum valve), the vacuum valve disc 9 rises upwards, the vacuum valve rod 6 also rises upwards, the flat head nut at the bottom end of the vacuum valve rod 6 cannot penetrate through the limiting vacuum valve rod sleeve 7, the vacuum valve disc 9 cannot rise upwards to a certain height, and the maximum height of the vacuum valve disc 9 is called as the maximum take-off height of the vacuum valve disc 9. At this time, the second through hole 51 is opened, and the air outside the all-weather and burn-resistant breather valve device 100 is sucked into the vacuum valve air chamber 5 from the detonation flame-retardant disk 21, then enters the common air chamber 3 through the second through hole 51, and then enters the storage tank through the breather port 2 and the medium-side flange 1, so that the gas pressure in the storage tank is supplemented, and the air shrinkage of the storage tank is prevented.

When the pressure in the storage tank is higher than the recoil pressure of the vacuum valve disc 9, the vacuum valve disc 9 falls back to the wedge-shaped vacuum valve seat 8 from the maximum takeoff height, and the bottom surface of the vacuum valve disc 9 and the top surface of the wedge-shaped vacuum valve seat 8 form efficient sealing again.

According to the invention, the main valve body 4 is integrally cast from stainless steel. The axial lead of the common air chamber 3, the axial lead of the vacuum valve air chamber 5 and the axial lead of the pressure valve air chamber 14 are superposed, so that the damage of unstable vibration of the all-weather burning-resistant breather valve device 100 caused by internal airflow disturbance can be avoided.

In accordance with the present invention, the fire resistant barrier assembly 30 comprises an insulating layer 16 and a fire resistant disc 17. The insulating layer 16 is preferably a polyphthalanitrile insulating layer. The burning-resistant fire-retardant component 30 can continuously resist burning for more than 2 hours under the condition that the all-weather burning-resistant breather valve device 100 is on fire, thereby avoiding the transmission of flame and high temperature to the inside of the storage tank, preventing the occurrence of explosion fire and effectively ensuring the safety of the tank area.

As shown in fig. 1, a second groove is provided at the central opening of the upper end of the main valve body 4, and the burning-resistant fire-retardant component 30 is fixedly installed in the second groove. The heat insulating layer 16 is installed at the lower end of the second groove above the center of the outlet of the pressure valve air chamber 14, and the fire-resistant fire retardant disc 17 is installed at the upper end of the groove above the center of the outlet of the pressure valve air chamber 14, so that the heat insulating layer 16 is arranged below the fire-resistant fire retardant disc 17. When the heat insulation layer 16 is subjected to high temperature, the surface of the heat insulation layer 16 forms a heat insulation carbon layer, and the heat insulation carbon layer is decomposed at 1000 ℃, so that the heat insulation layer 16 has excellent heat insulation performance. The heat insulating layer 16 can insulate the heat of the burning-resistant fire-retardant disc 17 from being transferred to the pressure valve air chamber 14, and flame and high temperature are prevented from being transferred to the inside of the storage tank. In one embodiment, the fire resistant plate 17 is made of stainless steel corrugated plate coil, and the small gaps between the corrugated plates are sprayed with heat insulating paint, so that the fire resistant plate can resist fire for more than 2 hours.

A second rain cover 19 is arranged above the burning-resistant fire-retardant assembly 30. The second rain shield 19 can be made of plastic or aluminum sheet, for example. In one embodiment, the second rain cover 19 may be fixedly mounted on the upper outer wall of the main valve body 4 by a fixing bolt 18. And form the combustion space between second rain-proof cover 19 and resistant fire disc 17 that hinders to form the annular export between second rain-proof cover 19 and the upper end of main valve body 4, the combustion space is through annular export and atmosphere intercommunication. Rain-proof cover 19 of second can prevent effectively that rainwater, insect and dust from getting into in the gap of fire-resistant dish 17 that hinders that burns, and rain-proof cover 19 of second can avoid the fire-resistant dish 17 that hinders the reduction of back-fire relief area and prevent the increase of fire-resistant dish 17 pressure drop that hinders. Rain-proof cover 19 of second can burn completely in five minutes of burning to thermal quick diffusion when realizing the burning-resistant breather valve burning, the gas outlet of pressure valve air chamber 14 makes progress perpendicularly simultaneously, and the heat of flame can be taken away rapidly by surrounding air, thereby effectively avoids the heat to gather.

The all-weather burning-resistant breather valve device 100 is arranged at the top of the storage tank, and can continuously burn for more than 2 hours under the condition that the breather valve is on fire, so that flame and high temperature can be effectively prevented from being transmitted into the storage tank, explosion and fire can be prevented, and the safety of a tank area can be guaranteed. The all-weather burn-resistant breather valve device 100 can be particularly applied to the explosion zero zone, wherein the explosion zero zone refers to an environment where explosive gas or dust continuously appears or appears for a long time, and for example, the space above the liquid level of a storage tank, gas pipelines in the tank zone, dock and ship shore butt joint pipelines and the like belong to the explosion zero zone.

The all-weather, burn-resistant breather valve assembly 100 will now be described with reference to a specific storage tank.

Taking a burning-resistant breather valve applied to a 5000-cubic benzene storage tank as an example, the diameter of a breather valve port 2 of the all-weather burning-resistant breather valve device 100 is DN200, the diameter of a casting main valve body 4 is 380mm, the overall height of the all-weather burning-resistant breather valve device 100 is 590mm, and the overall weight is 120 kg. The diameter of the wedge-shaped pressure seat 11 is 200mm and the diameter of the pressure valve disk 12 is 250 mm. The diameter of the wedge-shaped vacuum valve seat 8 is 160mm and the diameter of the vacuum valve disk 9 is 196 mm. The weight of the pressure valve disk 12 is adjusted so that the take-off pressure of the pressure valve disk 12 becomes 1350 Pa. The length of the pressure valve stem 13 and the inner depth of the pressure valve stem sleeve 15 are adjusted so that the maximum take-off height of the pressure valve disk 12 is set to 50 mm. The pressure at which the pressure-valve disk 12 can reach the maximum jump-off height is 1458Pa, i.e. an overpressure of 8%. The recoil pressure of the pressure-valve disc 12 is 1215 Pa. The weight of the vacuum valve disk 9 is adjusted so that the take-off pressure of the vacuum valve disk 9 is-300 Pa. The length of the vacuum valve rod 6 and the installation position of the limiting vacuum valve rod sleeve are adjusted, so that the maximum jump height of the vacuum valve disk 9 is set to be 55 mm. The pressure at which the vacuum valve disk 9 can reach the maximum jump-off height is-324 Pa, i.e. an overpressure of 8%. The recoil pressure of the vacuum valve disk 9 is-270 Pa.

When the gas pressure in the benzene storage tank exceeds the take-off pressure 1350Pa of the pressure valve disc 12, the pressure valve disc 12 rises upwards, the first through hole 101 is opened to open the pressure valve air chamber 14, the gas pressure in the benzene storage tank exceeds 1458Pa, the pressure valve disc 12 completely takes off, the gas in the benzene storage tank enters the common air chamber 3 from the breathing valve port 2, then the gas moves upwards to enter the pressure valve air chamber 14 through the first through hole 101, and then is discharged to the atmosphere through the heat insulation layer 16 and the burning-resistant fire retardant disc 17. When the gas pressure in the benzene storage tank is lower than the recoiling pressure 1215Pa of the pressure valve disc 12, the pressure valve disc 12 is quickly seated, and the bottom surface of the pressure valve disc 12 and the top surface of the wedge-shaped pressure valve seat 11 form efficient sealing.

When the gas in the benzene storage tank is negative pressure and is lower than the take-off pressure of the vacuum valve disc 9 by-300 Pa, the vacuum valve disc 9 rises upwards, the second through hole 41 is opened to open the vacuum valve air chamber 5, the gas pressure in the benzene storage tank is lower than-324 Pa, the vacuum valve disc 9 completely takes off, the air outside the all-weather burning-resistant breather valve device 100 is sucked into the vacuum valve air chamber 5 from the detonation fire-resistant disc 21, the air entering the vacuum valve air chamber 5 enters the common air chamber 3 through the second through hole 51, and then enters the benzene storage tank through the breather valve port 2 and the medium side flange 1 to supplement the gas pressure in the benzene storage tank. Until the gas pressure in the benzene storage tank is higher than the recoil pressure of the vacuum valve disc 9 by-270 Pa, the vacuum valve disc 9 is rapidly seated, and the bottom surface of the vacuum valve disc 9 and the top surface of the wedge-shaped vacuum valve seat 8 form efficient sealing.

The invention also provides a burning-resistant breather valve testing device 200 for testing the performance of the all-weather burning-resistant breather valve device 100. As shown in fig. 2, the burn-resistant breather valve test device 200 was connected to the media-side flange 1 of the all-weather burn-resistant breather valve device 100. The burning-resistant breather valve testing device 200 introduces benzene gas and air mixed gas into a burning gas inlet 201, opens a shutoff valve 203, detects and controls flow through a flow meter 202, ignites at the top end of the all-weather burning-resistant breather valve device 100, enables the benzene gas at the top end of the all-weather burning-resistant breather valve device 100 to continuously burn, and in the 2-hour process of benzene gas burning, a flame sensor 206 at the lower end of the all-weather burning-resistant breather valve device 100 does not detect flame all the time, so that the burning-resistant breather valve of a benzene tank can meet the 2-hour burning-resistant requirement. Wherein 204 is a combustion gas buffer tank, 207 is a rupture disk, and 205 is a pressure gauge.

Taking a burning-resistant breather valve applied to a 3000-cubic gasoline tank as an example, the diameter of a breather valve port 2 of the all-weather burning-resistant breather valve device 100 is DN150, the diameter of a main valve body 4 of a casting is 340mm, the overall height of the all-weather burning-resistant breather valve device 100 is 480mm, and the overall weight is 80 kg. The diameter of the wedge-shaped pressure valve seat 11 is 150mm and the diameter of the pressure valve disk 12 is 190 mm. The diameter of the wedge-shaped vacuum valve seat 8 is 110mm and the diameter of the vacuum valve disk 9 is 145 mm. The weight of the pressure valve disk 12 is adjusted so that the take-off pressure of the pressure valve disk 12 becomes 1000 Pa. The length of the pressure valve stem 13 and the inner depth of the pressure valve stem sleeve 15 are adjusted so that the maximum take-off height of the pressure valve disk 12 is set to 51 mm. The pressure at which the pressure valve disk 12 can reach the maximum jump-off height is 1080Pa, i.e. an overpressure of 8%. The recoil pressure of the pressure valve disc 12 is 900 Pa. The weight of the vacuum valve disk 9 is adjusted so that the take-off pressure of the vacuum valve disk 9 is-300 Pa. The length of the vacuum valve rod 6 and the installation position of the limiting vacuum valve rod sleeve are adjusted, so that the maximum jump height of the vacuum valve disk 9 is set to be 54 mm. The pressure at which the vacuum valve disk 9 can reach the maximum jump-off height is-324 Pa, i.e. an overpressure of 8%. The recoil pressure of the vacuum valve disk 9 is-270 Pa.

When the gas pressure in the gasoline storage tank exceeds the take-off pressure of the pressure valve disc 12 by 1000Pa, the pressure valve disc 12 rises upwards, the first through hole 101 is opened to open the pressure valve air chamber 14, the gas pressure in the gasoline storage tank exceeds 1080Pa, the pressure valve disc 12 takes off completely, the gas in the gasoline storage tank enters the common air chamber 3 from the breather port 2, then the gas moves upwards to enter the pressure valve air chamber 14 through the first through hole 101, and then is discharged to the atmosphere through the heat insulation layer 16 and the burning-resistant fire retardant disc 17. When the gas pressure in the gasoline storage tank is lower than the reseating pressure 900Pa of the pressure valve disc 12, the pressure valve disc 12 is rapidly seated, and the bottom surface of the pressure valve disc 12 and the top surface of the wedge-shaped pressure valve seat 11 form efficient sealing.

When the gas in the gasoline storage tank is negative pressure and lower than the jump pressure of the vacuum valve disc 9 by-300 Pa, the vacuum valve disc 9 rises upwards, the second through hole 41 is opened to open the vacuum valve air chamber 5, the gas pressure in the gasoline storage tank is lower than-324 Pa, the vacuum valve disc 9 jumps completely, the air outside the all-weather burning resistant breather valve device 100 is sucked into the vacuum valve air chamber 5 from the detonation flame-retardant disc 21, the air entering the vacuum valve air chamber 5 enters the common air chamber 3 through the second through hole 51, and then enters the gasoline storage tank through the breather valve port 2 and the medium side flange 1 to supplement the gas pressure in the gasoline storage tank. Until the gas pressure in the gasoline storage tank is higher than the recoil pressure of the vacuum valve disc 9 by-270 Pa, the vacuum valve disc 9 is quickly seated, and the bottom surface of the vacuum valve disc 9 and the top surface of the wedge-shaped vacuum valve seat 8 form efficient sealing.

As shown in fig. 2, the burn-resistant breather valve test device 200 was connected to the media-side flange 1 of the all-weather burn-resistant breather valve device 100. The burning-resistant breather valve testing device 200 introduces gasoline oil gas and air mixed gas into a burning gas inlet 201, opens a shutoff valve 203, detects and controls flow through a flow meter 202, ignites at the top end of the all-weather burning-resistant breather valve device 100, enables gasoline oil gas at the top end of the all-weather burning-resistant breather valve device 100 to be continuously burnt, and in the 2-hour burning process of the gasoline oil gas, a flame sensor 206 at the lower end of the all-weather burning-resistant breather valve device 100 does not detect flame all the time, so that the burning-resistant breather valve of the gasoline storage tank can meet the 2-hour burning-resistant requirement.

Taking a burning-resistant breather valve applied to a 2000-cubic ethylene storage tank as an example, the diameter of a breather valve port 2 of the all-weather burning-resistant breather valve device 100 is DN100, the diameter of a casting main valve body 4 is 260mm, the overall height of the all-weather burning-resistant breather valve device 100 is 450mm, and the overall weight is 52 kg. The diameter of the wedge-shaped pressure seat 11 is 100mm and the diameter of the pressure valve disk 12 is 130 mm. The diameter of the wedge-shaped vacuum valve seat 8 is 80mm and the diameter of the vacuum valve disk 9 is 96 mm. Adjusting the weight of the pressure valve disc 12 to make the take-off pressure of the pressure valve disc 12 670 Pa; the length of the pressure valve stem 13 and the inner depth of the pressure valve stem sleeve 15 are adjusted so that the maximum take-off height of the pressure valve disk 12 is set to 45 mm. The pressure at which the pressure-tight valve disk 12 can reach the maximum jump-off height is 724Pa, i.e. an overpressure of 8%. The recoil pressure of the pressure-valve disc 12 is 603 Pa. The weight of the vacuum valve disk 9 is adjusted so that the take-off pressure of the vacuum valve disk 9 is-300 Pa. The length of the vacuum valve rod 6 and the installation position of the limiting vacuum valve rod sleeve are adjusted, so that the maximum take-off height of the vacuum valve disk 9 is set to be 45 mm. The pressure at which the vacuum valve disk 9 can reach the maximum jump-off height is-324 Pa, i.e. an overpressure of 8%. The recoil pressure of the vacuum valve disk 9 is-270 Pa.

When the gas pressure in the ethylene storage tank exceeds the jump pressure 670Pa of the pressure valve disc 12 of the burning-resistant breather valve, the pressure valve disc 12 rises upwards, the first through hole 101 is opened to open the pressure valve air chamber 14, the gas pressure in the ethylene storage tank exceeds 724Pa, the pressure valve disc 12 jumps completely, the gas in the ethylene storage tank enters the common air chamber 3 from the breather valve port 2, and then the gas is transported upwards to enter the pressure valve air chamber 14 through the first through hole 101 and is discharged to the atmosphere through the heat-insulating layer 16 and the burning-resistant fire retardant disc 17. When the gas pressure in the ethylene storage tank is lower than the recoil pressure 603Pa of the pressure valve disc 12, the pressure valve disc 12 is rapidly seated, and the bottom surface of the pressure valve disc 12 and the top surface of the wedge-shaped pressure valve seat 11 form efficient sealing.

When the gas in the ethylene storage tank is negative pressure and is lower than the jump-off pressure of the vacuum valve disc 9 by-300 Pa, the vacuum valve disc 9 rises upwards, the second through hole 41 is opened to open the vacuum valve air chamber 5, the gas pressure in the ethylene storage tank is lower than-324 Pa, the vacuum valve disc 9 jumps completely, the air outside the all-weather burning resistant breather valve device 100 is sucked into the vacuum valve air chamber 5 from the detonation flame-retardant disc 21, the air entering the vacuum valve air chamber 5 enters the common air chamber 3 through the second through hole 51, and then enters the ethylene storage tank through the breather valve port 2 and the medium side flange 1 to supplement the gas pressure in the ethylene storage tank. Until the gas pressure in the ethylene storage tank is higher than the recoil pressure of the vacuum valve disc 9 by-270 Pa, the vacuum valve disc 9 is rapidly seated, and the bottom surface of the vacuum valve disc 9 and the top surface of the wedge-shaped vacuum valve seat 8 form efficient sealing.

As shown in fig. 2, the burn-resistant breather valve test device 200 was connected to the media-side flange 1 of the all-weather burn-resistant breather valve device 100. The burning-resistant breather valve testing device 200 introduces mixed gas of ethylene gas and air into a burning gas inlet 201, opens a shutoff valve 203, detects and controls flow through a flow meter 202, ignites at the top end of the all-weather burning-resistant breather valve device 100, enables the ethylene gas at the top end of the all-weather burning-resistant breather valve device 100 to continuously burn, and proves that the burning-resistant breather valve of the ethylene storage tank can meet the requirement of 2-hour burning resistance because flame is not detected by a flame sensor 206 at the lower end of the all-weather burning-resistant breather valve device 100 in the 2-hour burning process of the ethylene gas.

The all-weather burning-resistant breather valve device 100 can continuously resist burning for more than 2 hours under the condition of fire through the fire retardant disc assembly 30, thereby effectively preventing flame and high temperature from being transmitted into the storage tank, preventing the occurrence of explosion and fire and ensuring the safety of a tank area. This all-weather resistant breather valve device 100 still has explosion-proof performance, through the lateral wall at the main valve body 4 be equipped with the detonation of the 5 intercommunications of vacuum valve chamber of vacuum valve 50 hinder fire dish 21, in flame passed through vacuum valve air chamber 5 and got into the storage tank when can effectively preventing the outer conflagration of storage tank or explode, be favorable to guaranteeing the safety of storage tank very much, and through hinder fire dish 21 outer installation first rain-proof cover can avoid the detonation to hinder the reduction of fire disk 21 back-fire area and prevent the detonation to hinder the increase of fire disk 21 pressure drop. And, this all-weather resistant breather valve device 100 is through setting up the gaseous export of pressure valve perpendicularly upwards, thereby will breathe a structure setting at the top, rain-proof cover 19 of second can burn out totally in five minutes, thereby thermal quick diffusion when realizing the breather valve burning, make the flame heat in breather valve exit can be taken away rapidly by surrounding air, avoid the heat to gather, reduce heat transfer to back-fire relief dish subassembly 30, the emergence of explosion fire has been prevented, the safety in tank field has further been ensured. In addition, all-weather resistant breathing valve device 100 that burns sets up through the coaxial axle with vacuum valve 50 and pressure valve 40, can avoid the inside air current disturbance of breathing valve to bring the unstable harm of breathing valve vibration, reduces breathing valve volumn and lightens breathing valve weight simultaneously, alleviates the heavy burden at storage tank top, avoids the risk that the storage tank top collapses.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality" means two or more unless specifically limited otherwise.

In addition, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An all weather, burn resistant respiratory valve apparatus comprising:

a main valve body (4) having a cylindrical shape;

a burning-resistant fire-retardant component (30) arranged at the upper end opening of the main valve body;

a pressure valve (40) formed inside the main valve body, and a pressure valve air chamber (14) and a common air chamber (3) are respectively formed on the upper side and the lower side of the pressure valve;

a vacuum valve (50) disposed within the common chamber and fixedly attached to a side wall of the main valve body, the vacuum valve including a vacuum valve chamber (5) with a detonation suppressant disk (21) disposed at a side of the vacuum valve body;

the all-weather burning-resistant breather valve device is constructed to be capable of opening the pressure valve when the gas pressure in the storage tank exceeds the preset pressure of the pressure valve, so that the gas in the storage tank sequentially enters the common air chamber and the pressure valve air chamber and then is discharged through the burning-resistant fire retardant assembly, and the vacuum valve is opened when the gas in the storage tank is negative pressure and is lower than the preset pressure of the vacuum valve, so that the external air is sucked into the vacuum valve air chamber from the detonation fire retardant disc, and then enters the common air chamber through the vacuum valve to enter the storage tank, thereby supplementing the gas pressure of the storage tank.

2. The all-weather burn-resistant breathing valve apparatus of claim 1, wherein the pressure valve includes a partition plate (10) fixedly connected to a side wall of the main valve body and a pressure valve disk (12) disposed above the partition plate, the pressure valve air chamber and the common air chamber being formed at upper and lower sides of the partition plate, respectively,

the middle part of the separation plate is provided with a first through hole (101), the pressure valve disc is correspondingly arranged at the first through hole, and the pressure valve disc can block the first through hole to close the pressure valve and can be lifted to open the pressure valve.

3. The all-weather, burn-resistant breathing valve arrangement of claim 2, wherein a lifting sleeve assembly (60) is connected between the pressure valve disc and the burn-resistant flame retardant assembly,

the lifting sleeve component comprises a sleeve (15) and a pressure valve rod (13) which is installed in the sleeve in an adaptive mode, the pressure valve rod is fixedly connected with a pressure valve disc, the sleeve is fixedly connected to the lower end of the burning-resistant fire-retardant component, and the pressure valve rod can move up and down along the sleeve.

4. The all weather, burn resistant breathing valve apparatus of claim 2 or 3, wherein an annular wedge shaped pressure valve seat (11) is provided within the first through bore, the wedge shaped pressure valve seat being in interference fit with the first through bore,

the bottom surface of the pressure valve disk has a surface roughness of less than 10 microns such that the bottom surface of the pressure valve disk is capable of making intimate contact with the top surface of the wedge-shaped pressure valve seat to form a seal.

5. The all-weather burn-resistant breather valve device according to claim 1, wherein the vacuum valve includes a vacuum valve body, the vacuum valve air chamber is formed inside the vacuum valve body, the upper end of the vacuum valve body is provided with a second through hole (51) at which a vacuum valve disk (9) is provided,

the vacuum valve disk can close the second through hole to close the vacuum valve and can lift to open the vacuum valve.

6. The all-weather burn-resistant breather valve device according to claim 5, wherein a vacuum valve rod (6) is fixed at the lower end of the vacuum valve disk, a limiting vacuum valve rod sleeve (7) is fixed on the inner wall of the vacuum valve body, and the vacuum valve rod is fittingly installed in the limiting vacuum valve rod sleeve and can move up and down along the limiting vacuum valve rod sleeve.

7. The all weather, burn resistant breathing valve apparatus of claim 5 or 6, wherein an annular wedge-shaped vacuum valve seat (8) is provided within the second through-hole, the wedge-shaped vacuum valve seat being an interference fit with the second through-hole,

the surface roughness of the bottom surface of the vacuum valve disk is less than 10 microns, so that the bottom surface of the vacuum valve disk can be in close contact with the top surface of the wedge-shaped vacuum valve seat to form a seal.

8. The all weather resistant breather valve device of claim 5 or 6, wherein a first groove is configured at the side of the vacuum valve body, the detonation flame retardant disc is fixedly mounted in the first groove, and a first rain shield (22) is provided at the outer side of the detonation flame retardant disc assembly.

9. The all-weather, burn-resistant breather valve apparatus of claim 1 or 3, wherein the burn-resistant fire-retardant assembly includes a thermally insulating layer (16) and a burn-resistant fire tray (17), the thermally insulating layer being disposed below the burn-resistant fire tray,

the upper end of the main valve body is provided with a second groove, and the burning-resistant fire-retardant component is fixedly arranged in the second groove.

10. The all weather fire resistant breather valve apparatus of claim 1 or 9, wherein a second rain shield (19) is provided above the fire resistant fire retardant assembly, wherein the second rain shield is capable of sustaining combustion for 5 minutes to complete burnout in the event of a fire, and wherein the fire resistant fire retardant assembly is capable of sustaining fire resistant combustion for at least 2 hours.

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