CN117515238A - Breather valve - Google Patents

Breather valve Download PDF

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Publication number
CN117515238A
CN117515238A CN202311756464.0A CN202311756464A CN117515238A CN 117515238 A CN117515238 A CN 117515238A CN 202311756464 A CN202311756464 A CN 202311756464A CN 117515238 A CN117515238 A CN 117515238A
Authority
CN
China
Prior art keywords
negative pressure
positive pressure
valve cover
shell
pressure valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311756464.0A
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Chinese (zh)
Inventor
王爱生
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202311756464.0A priority Critical patent/CN117515238A/en
Publication of CN117515238A publication Critical patent/CN117515238A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F16K17/194—Equalising valves predominantly for tanks weight-loaded
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Safety Valves (AREA)

Abstract

A breather valve comprises a negative pressure valve cover and a positive pressure valve cover, wherein the negative pressure valve cover and the positive pressure valve cover are arranged in a storage tank body. The positive pressure valve cover and the negative pressure valve cover of the breather valve are arranged in the storage tank, so that the working environments of the positive pressure valve cover and the negative pressure valve cover are greatly improved, and the problem that the positive pressure valve cover and the negative pressure valve cover are frozen is fundamentally solved because the temperature of the inner top of the storage tank is generally higher than 0 ℃, and the breather valve can be fundamentally prevented from freezing.

Description

Breather valve
Technical Field
The invention relates to the field of storage tanks, in particular to a breather valve for a storage tank.
Technical Field
The breather valve is a switch valve which ensures that the storage tank space is isolated from the atmosphere in a certain pressure range and can be communicated with the atmosphere when the pressure range is exceeded or undershot. Its function is to prevent the damage of the storage tank caused by overpressure or super negative pressure and to reduce the evaporation loss of the liquid. The breather valve is arranged, so that the gas emission in the tank can be reduced, the pollution to the atmosphere is reduced, the storage tank can be prevented from being damaged due to overpressure or is shrunken due to super-negative pressure, and the breather valve plays an important role in safety and environmental protection.
The prior breather valve comprises a valve body, a positive pressure valve cover and a negative pressure valve cover, wherein the positive pressure valve cover and the negative pressure valve cover are arranged in the valve body, the whole breather valve is arranged at the top of a storage tank, when the breather valve works for a long time in a low-temperature environment, as the gas exhaled by the storage tank and inhaled by the storage tank contains water vapor, the water vapor is separated out on the valve cover to form water drops, so that the positive pressure valve cover and the negative pressure valve cover are frozen and lose the activity to cause the failure of the breather valve. There is a risk of the tank being over-pressurized or being deflated. Therefore, the problem that the breather valve is easy to freeze in a low-temperature environment is fundamentally solved, and the safe operation of the storage tank is ensured to have important significance.
Disclosure of Invention
The invention aims to solve the problem that a breather valve in the prior art cannot work in a low-temperature environment for a long time, and provides the breather valve for a storage tank, so that the breather valve cannot be frozen easily at a low temperature and can work normally.
The technical problems of the invention are solved by the following technical scheme:
a breather valve comprises a negative pressure valve cover and a positive pressure valve cover in the breather valve, and is characterized in that the negative pressure valve cover and the positive pressure valve cover are arranged in a storage tank body.
The breathing valve comprises a tank outer assembly and a tank inner assembly, wherein the tank outer assembly comprises a tank outer shell, a respiratory tract top plate, a rain-proof and dust-proof cap and an outer respiratory tract formed by a space in the tank outer shell, the outer respiratory tract is provided with breathing holes, the rain-proof and dust-proof cap is fixed on the respiratory tract top plate through bolts, and the tank inner assembly comprises a tank inner shell, a fire-retarding plate, a gland, a negative pressure shell, a negative pressure valve cover, a positive pressure shell, a breathing pipe and a positive pressure valve cover. The negative pressure shell is arranged in the tank inner shell, the positive pressure shell is arranged in the negative pressure shell, the bottom of the tank inner shell is sealed with the bottom of the negative pressure shell through an annular plate, the negative pressure shell is fixed and communicated with the positive pressure shell through 2 or 3 breathing tubes, an upper vent hole is formed in the top of the positive pressure shell, a negative pressure valve cover is arranged on the top of the positive pressure shell and seals the upper vent hole, a lower air through hole is formed in the bottom of the positive pressure shell, the positive pressure valve cover is arranged on the bottom of the positive pressure shell and seals the lower vent hole, and the outer ring of the bottom of the tank outer shell and the outer ring of the top of the tank inner shell are fixed on a flange of a breathing port of the storage tank through bolts.
As an optimization scheme, the inner shell of the tank is provided with a fire-retardant plate, and the fire-retardant plate is positioned at the upper part of the negative pressure shell. The fire-retardant plate is arranged on the fire-retardant plate supporting ring, sleeved on the gland sleeve and fixed by a gasket bolt;
as an optimization scheme, the negative pressure shell comprises a main body of the negative pressure shell and a gland, wherein the top of the main body of the negative pressure shell is provided with a communication hole, and the gland is arranged at the top of the main body of the negative pressure shell and seals the communication hole by the gland, so that the breather valve is convenient to manufacture and install.
As an optimization scheme, the shell in the tank, the negative pressure shell and the positive pressure shell are concentrically arranged.
As an optimization scheme, the negative pressure valve cover moves up and down through the negative pressure valve cover guide mechanism, so that the negative pressure valve cover can move up and down stably, and the negative pressure valve cover can be reset.
As an optimization scheme, negative pressure valve gap guiding mechanism includes gland sleeve pipe, negative pressure sleeve pipe, and gland sleeve pipe sets up at the gland center, gland sleeve pipe lower part threaded connection on the gland, and the negative pressure sleeve pipe sets up at negative pressure valve gap center, and negative pressure sleeve pipe lower part threaded connection is on the negative pressure valve lid, and negative pressure sleeve pipe upper portion nestification is in the gland sleeve pipe. In this way, the negative pressure valve cover is guided and restrained by the negative pressure sleeve and the gland sleeve to stably move up and down.
As an optimization scheme, the positive pressure valve cover moves up and down through the positive pressure valve cover guide mechanism, so that the positive pressure valve cover can move up and down stably, and the positive pressure valve cover can be reset.
As an optimization scheme, the positive pressure valve cover guiding mechanism comprises a negative pressure sleeve and a positive pressure sleeve rod, wherein the negative pressure sleeve is arranged at the center of the negative pressure valve cover, the lower part of the negative pressure sleeve is in threaded connection with the negative pressure valve cover, the positive pressure sleeve rod is arranged at the center of the positive pressure valve cover, the positive pressure sleeve rod is fixed with the positive pressure valve cover through a bolt, and the upper part of the positive pressure sleeve rod is nested in the negative pressure sleeve. Thus, the positive pressure valve cover is guided and restrained by the negative pressure sleeve and the positive pressure sleeve rod to stably move up and down.
As an optimization scheme, the edge of the positive pressure valve cover is further provided with a circle of boss a, and the boss a is supported by the bottom of the positive pressure shell, so that the contact area between the positive pressure valve cover and the bottom of the positive pressure shell is reduced, the surface tension of a contact surface is reduced, the positive pressure valve cover acts more easily, and the pressure control is more accurate.
As an optimization scheme, the edge of the negative pressure valve cover is further provided with a circle of boss b, and the boss b is supported by the top of the positive pressure shell, so that the contact area between the negative pressure valve cover and the top of the positive pressure shell is reduced, the surface tension of a contact surface is reduced, the action of the negative pressure valve cover is easier, and the pressure control is more accurate.
As an optimization scheme, the outer ring at the bottom of the tank outer shell and the outer ring at the top of the tank inner shell are fixed on a breathing port flange at the top of the storage tank together through bolts.
As an optimization scheme, the gland, the negative pressure valve cover and the positive pressure valve cover are all round steel plates, the gland, the negative pressure valve cover and the positive pressure valve cover are concentrically arranged, the negative pressure valve cover is located at the upper part of the positive pressure shell to seal the upper vent hole, and the positive pressure valve cover is located at the bottom of the positive pressure shell to seal the lower vent hole. The negative pressure valve cover and the positive pressure valve cover can only move upwards along the axial direction.
As an optimization scheme, a plurality of tear holes are formed in the annular bottom plate of the bottom of the breather valve, so that effusion in the inner respiratory tract is prevented, and the breather valve is opened and closed more conveniently.
Drawings
Fig. 1 is a schematic cross-sectional view of a breather valve according to an embodiment of the invention.
Fig. 2 is a top view of A-A in fig. 1.
Fig. 3 is a top view of B-B in fig. 1.
Fig. 4 is a top view of C-C in fig. 1.
Fig. 5 is a detailed view of the internal cross section of a breather valve of an embodiment of the present invention.
Fig. 6 is an assembled view of a firestop plate, a firestop plate support ring, a gland, a negative pressure valve cover, and a positive pressure valve cover in an embodiment of the invention.
Fig. 7 is a view of a firestop plate support ring of the present invention secured within the inner shell of a tank.
Description of the embodiments
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1-7, a breather valve includes an out-of-can assembly and an in-can assembly.
The outer tank assembly comprises an outer tank shell 29, a respiratory tract top plate 33 and a rain-proof and dust-proof cap 30; the rain-proof and dust-proof cap 30 is fixed to the airway top plate 33 by bolts e 2. The outer breathing passage 31 is formed of a tubular steel tube, the top of which is closed by a respiratory tract ceiling 33. The wall of the steel pipe is provided with 3 breathing holes 32 which are uniformly distributed at 120 degrees.
The in-can assembly comprises a can inner shell 11, a gland 5, a negative pressure shell 10, a negative pressure valve cover 22, a positive pressure shell 20, a breathing tube 12 and a positive pressure valve cover 15.
The tank inner shell 11, the negative pressure shell 10 and the positive pressure shell 20 are concentrically arranged along the center axis, the negative pressure shell 10 and the positive pressure shell 20 are fixed and communicated by 2 or 3 breathing tubes 12, the wall of the tank inner shell 11 and the wall of the negative pressure shell 10 are closed at the bottom by an annular bottom plate 34, and an annular space formed by the annular bottom plate 34, the inner wall of the tank inner shell 11 and the outer wall of the negative pressure shell 10 in the embodiment is the inner respiratory tract 9 of the storage tank.
The fire-retardant plate 28 divides the respiratory tract into an inner part and an outer part, the upper part of the fire-retardant plate 28 is the outer respiratory tract 31 of the storage tank, and the lower part of the fire-retardant plate 28 is the inner respiratory tract 9 of the storage tank.
The fire-retarding plate 28 and the fire-retarding plate supporting ring 25 are sleeved on the gland sleeve 3, and the fire-retarding plate 28 is fixed on the gland sleeve 3 through the gasket 4 and the bolt d 1.
The top ends of the gland 5 and the negative pressure shell 10 are fixed by 3 uniformly distributed bolts b8, the top ends of the negative pressure shell 10 are sealed, and the negative pressure shell is formed by the gland 5 and the negative pressure shell 10 for convenient manufacture and installation, and the gland 5 and the negative pressure shell 10 can be manufactured into a whole.
The positive pressure shell 20 of the negative pressure shell 10 is fixed and communicated by 2 or 3 breathing tubes 12, an annular space formed by the inner wall of the negative pressure shell 10 and the outer wall of the positive pressure shell 20 is a negative pressure air inlet channel 35, and the negative pressure air inlet channel 35 is communicated with the inner space of the storage tank.
The center of the gland 5 is provided with a gland sleeve 3, and the lower part of the gland sleeve 3 passes through the center of the gland 5 and is connected to the gland 5 through threads.
The negative pressure valve cover 22 and the negative pressure sleeve 6 are fixed through screw threads, and the upper part of the negative pressure sleeve 6 is nested in the gland sleeve 3.
The negative pressure valve cap 22 is supported by the top of the positive pressure housing 20 and seals an upper vent 24 at the top of the positive pressure housing 20.
The positive pressure valve cover 15 is supported by the bottom of the positive pressure shell 20 and seals the lower vent hole 17 at the bottom of the positive pressure shell 20.
The positive pressure valve cover 15 and the positive pressure loop bar 18 are fixed through a bolt C16, and the upper part of the positive pressure loop bar 18 is nested in the negative pressure sleeve 6.
The edge of the positive pressure valve cover 15 is further provided with a circle of boss a14, and the boss a14 is supported by the bottom of the positive pressure shell 20, so that the contact area between the positive pressure valve cover 15 and the bottom of the positive pressure shell 20 is reduced, the surface tension of a contact surface is reduced, the positive pressure valve cover 15 acts more easily, and the pressure control is more accurate.
The edge of the negative pressure valve cover 22 is further provided with a circle of boss b21, and the boss b21 is supported by the top of the positive pressure shell 20, so that the contact area between the negative pressure valve cover 22 and the top of the positive pressure shell 20 is reduced, the surface tension of the contact surface is reduced, the action of the negative pressure valve cover 22 is easier, and the pressure control is more accurate.
The gland 5, the negative pressure valve cover 22 and the positive pressure valve cover 15 are concentrically arranged along the center axis of the breather valve, and the gland 5, the negative pressure valve cover 22 and the positive pressure valve cover 15 are concentrically arranged along the axis of the breather valve, the upper part of the positive pressure sleeve 18 is nested in the negative pressure sleeve 6, and the upper part of the negative pressure sleeve 6 is nested in the gland sleeve 3, so that the negative pressure valve cover 22 and the positive pressure valve cover 15 can only move upwards along the axis direction, the stable movement of the negative pressure valve cover 22 and the positive pressure valve cover 15 is ensured, and the accurate homing can be realized.
The outer ring at the bottom of the tank outer shell 29 and the outer ring at the top of the tank inner shell 11 are fixed on a breathing port flange 27 at the top of the tank through bolts a26, and the breathing port flange 27 is arranged on a breathing port flange neck 7 of the tank.
When the pressure in the storage tank is balanced with the atmospheric pressure, the negative pressure valve cover 22 is tightly sealed by the self gravity and is located on the upper vent hole 24, the positive pressure valve cover 15 is tightly sealed by the self gravity and is located on the lower vent hole 17, when the pressure of the storage tank exceeds the operation positive pressure of the storage tank, the positive pressure valve cover 15 is jacked up by gas in the tank, the gas enters the positive pressure cavity 19 through the lower vent hole 17 upwards, enters the inner respiratory tract 9 of the storage tank through the breathing tube 12, then enters the outer respiratory tract 31 of the storage tank through the fire-retardant plate 28 and finally is discharged through the breathing hole 32, so that the pressure of the storage tank and the atmospheric pressure are balanced, when the pressure of the storage tank exceeds the operation negative pressure of the storage tank, the gas outside the storage tank enters the inner respiratory tract 9 through the outer respiratory tract 32, enters the outer respiratory tract 31 and enters the positive pressure cavity 19 of the positive pressure shell 20 through the fire-retardant plate 28, and then enters the positive pressure cavity 19 of the positive pressure shell 20 through the breathing tube 12, at this time, the negative pressure valve cover 22 is jacked up by the gas, and the gas enters the negative pressure cavity 23 through the upper vent hole 24 and finally enters the inner space of the storage tank, so that the atmospheric pressure and the pressure of the storage tank is balanced.
In this embodiment, the annular bottom plates 34 at the bottom of the inner shell 11 and the bottom of the negative pressure shell 10 are further provided with the tear holes 13, the diameter of each tear hole is 3mm-5 mm, the number of the tear holes can be multiple, the number of the tear holes is 4 in this embodiment, and the tear holes 13 can enable the effusion in the inner respiratory tract 9 of the storage tank to drop into the storage tank through the tear holes 13, so that the effusion in the inner respiratory tract 9 can be effectively prevented, which is particularly important for the storage tank with more water vapor in the storage medium.
In this embodiment, there are 2 breathing tubes 12 that fix and connect the negative pressure shell 10 and the positive pressure shell 20, and 3 breathing tubes may be provided.
In this embodiment, the gland 5 and the gland sleeve 3, the negative pressure valve cap 22 and the negative pressure sleeve 6, and the positive pressure valve cap 15 and the positive pressure sleeve 18 are all fixed by threaded threads, so that the assembly and disassembly are convenient, and the assembly and disassembly can be fixed by other methods such as expanding pipes.

Claims (10)

1. A breather valve comprises a negative pressure valve cover and a positive pressure valve cover, and is characterized in that the negative pressure valve cover and the positive pressure valve cover are arranged in a storage tank body.
2. The breather valve of claim 1, wherein the breather valve comprises an out-of-can assembly comprising an out-of-can housing, a rain-proof and dust cap, and a space in the out-of-can housing forming an outer breathing passage, and an in-can assembly comprising an in-can housing, a firestop plate, a gland, a negative pressure housing, a negative pressure valve cap, a positive pressure housing, a positive pressure valve cap, and a breathing tube. The negative pressure shell is arranged in the tank inner shell, the positive pressure shell is arranged in the negative pressure shell, the bottom of the tank inner shell is sealed with the bottom of the negative pressure shell through an annular steel plate, the negative pressure shell is fixed and communicated with the positive pressure shell through a breathing pipe, an upper vent hole is formed in the top of the positive pressure shell, a negative pressure valve cover is arranged on the top of the positive pressure shell and seals the upper vent hole, a lower vent hole is formed in the bottom of the positive pressure shell, the positive pressure valve cover is arranged on the bottom of the positive pressure shell and seals the lower vent hole, and the outer ring of the bottom of the tank outer shell and the outer ring of the top of the tank inner shell are fixed on the breathing hole of the storage tank together.
3. The breather valve of claim 2, wherein the tank inner housing is provided with a fire-retardant plate, and the fire-retardant plate is located at an upper portion of the negative pressure housing. The fire-retardant plate is arranged on the fire-retardant plate supporting ring and is fixed on the gland sleeve by bolts and gaskets.
4. The breather valve of claim 2, wherein the negative pressure housing comprises a body of the negative pressure housing and a gland, the top of the body of the negative pressure housing is provided with the communication hole, and the gland is arranged on the top of the body of the negative pressure housing and seals the communication hole.
5. The breather valve of claim 2, wherein the negative pressure valve cover is moved up and down by a negative pressure valve cover guide mechanism.
6. The breather valve of claim 5, wherein the negative pressure valve cover guiding mechanism comprises a gland bush and a negative pressure bush, the gland bush is arranged at the center of the gland, the lower part of the gland bush is connected with the gland in a threaded manner, the negative pressure bush is arranged at the center of the negative pressure valve cover, the lower part of the negative pressure bush is connected with the negative pressure valve cover in a threaded manner, and the upper part of the negative pressure bush is nested in the gland bush.
7. The breather valve of claim 2, wherein the positive pressure valve cover is moved up and down by a positive pressure valve cover guide mechanism.
8. The breather valve of claim 7, wherein the positive pressure valve cover guiding mechanism comprises a negative pressure sleeve and a positive pressure sleeve rod, the negative pressure sleeve is arranged at the center of the negative pressure valve cover, the lower part of the negative pressure sleeve is connected with the negative pressure valve cover in a threaded manner, the positive pressure sleeve rod is arranged at the center of the positive pressure valve cover, the positive pressure sleeve rod and the positive pressure valve cover are fixed by bolts, and the upper part of the positive pressure sleeve rod is nested in the negative pressure sleeve.
9. The breather valve of claim 2, wherein the edge of the positive pressure valve cap is further provided with a circle of bosses a supported by the bottom of the positive pressure shell, and the edge of the negative pressure valve cap is further provided with a circle of bosses b supported by the top of the positive pressure shell.
10. The breather valve of claim 2, wherein the annular seal plate at the bottom of the breather valve is provided with a plurality of tear holes.
CN202311756464.0A 2023-12-20 2023-12-20 Breather valve Pending CN117515238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311756464.0A CN117515238A (en) 2023-12-20 2023-12-20 Breather valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311756464.0A CN117515238A (en) 2023-12-20 2023-12-20 Breather valve

Publications (1)

Publication Number Publication Date
CN117515238A true CN117515238A (en) 2024-02-06

Family

ID=89745856

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311756464.0A Pending CN117515238A (en) 2023-12-20 2023-12-20 Breather valve

Country Status (1)

Country Link
CN (1) CN117515238A (en)

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