CN214197432U - Pilot-operated breather valve - Google Patents
Pilot-operated breather valve Download PDFInfo
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- CN214197432U CN214197432U CN202022399025.7U CN202022399025U CN214197432U CN 214197432 U CN214197432 U CN 214197432U CN 202022399025 U CN202022399025 U CN 202022399025U CN 214197432 U CN214197432 U CN 214197432U
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Abstract
The utility model relates to a breather valve technical field especially relates to pilot-operated breather valve, solves the shortcoming that exists among the prior art, including valve body, stud, first hexagon nut, first gasket, round nut, first hexagon head bolt, foraminiferous gasket A, foraminiferous gasket B, socket head cap screw, second hexagon head bolt, foraminiferous gasket C, third hexagon head bolt, second gasket, coupling, pilot-operated breather valve pilot valve, fourth hexagon head bolt, second hexagon nut, diaphragm gasket, third hexagon nut, main valve upper membrane lid and main valve lower membrane lid, be fixed with the export body through stud and first hexagon nut on the valve body, foraminiferous gasket B compresses tightly between valve body and export body; the pilot valve, the main valve film cavity, the outlet body and the valve body are in modular design, the universality is strong, the positive pressure can reach full opening under the condition that the pressure is 10% higher than the pressure, the pilot type sealing structure is large in discharge when the valve is opened, and the positive pressure sealing performance is good.
Description
Technical Field
The utility model relates to a breather valve technical field especially relates to guide's formula breather valve.
Background
The breather valve is the essential safety device of storage tank, is used for adjusting the interior external pressure balance of oil jar, reduces the oil loss, guarantees the storage tank operation safety. The device is suitable for being arranged above a storage tank for storing A-type oil products with flash points lower than 28 ℃ and B-type oil products with flash points lower than 60 ℃, such as gasoline, kerosene, light diesel oil, benzene, toluene, crude oil and the like, and chemical raw materials. The gravity-loaded atmospheric pressure vacuum relief valve can provide pressure or vacuum relief under conditions of pump injection/extraction of media or heat exchange, thereby preventing the tank from bursting or collapsing.
The breather valve is vertically arranged on the top of the storage tank, so that the sealing pair of the breather valve is in a closed position. When the external temperature rises or materials are injected, the gas medium in the storage tank expands, the pressure of the gas medium also gradually rises, if the pressure of the gas medium exceeds a specified positive pressure respiration value, the valve expiration sealing auxiliary valve flap of the valve is opened, the positive pressure is released, and when the pressure in the storage tank is reduced to a specified value, the valve flap is closed in time.
When the outside temperature is reduced or materials are extracted, the pressure in the storage tank is reduced and vacuum negative pressure occurs, when a specified negative pressure value is reached, the valve air suction sealing auxiliary valve flap is opened to suck air or nitrogen, and when the pressure in the storage tank and the atmospheric pressure of the outside air are balanced to a specified value, the air suction valve flap is closed to ensure the normal use of the storage tank.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a pilot-operated breather valve.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the pilot-operated breather valve comprises a valve body, a stud, a first hexagon nut, a first gasket, a round nut, a first hexagon bolt, a gasket A with holes, a gasket B with holes, an inner hexagon screw, a second hexagon bolt, a gasket C with holes, a third hexagon bolt, a second gasket, a pipe joint, a pilot-operated breather valve pilot valve, a fourth hexagon bolt, a second hexagon nut, a diaphragm gasket, a third hexagon nut, a main valve upper diaphragm cover and a main valve lower diaphragm cover, wherein an outlet body is fixed on the valve body through the stud and the first hexagon nut, and the gasket B with holes is tightly pressed between the valve body and the outlet body;
a valve rod guide sleeve is fixedly arranged on the lower membrane cover of the main valve through a round nut, and a gravity type positive pressure valve clack is assembled in the valve rod guide sleeve in a sliding mode;
the upper main valve membrane cover and the lower main valve membrane cover are fixedly connected through a fourth hexagon head bolt, a spring washer and a second hexagon nut, a cavity is formed between the upper main valve membrane cover and the lower main valve membrane cover, the lower main valve membrane cover is fixed on the outlet body through the first hexagon head bolt, and the gasket A with holes is tightly pressed and fixed between the outlet body and the lower main valve membrane cover;
the pilot valve of the pilot type breather valve is fixed on the upper membrane cover of the main valve through thread sealing;
the valve body is fixedly provided with a valve cover through a second hexagon head bolt, the valve cover is slidably provided with a gravity type negative pressure valve clack, and the gasket C with the hole is tightly pressed and fixed between the valve body and the valve cover;
the valve body is fixed with a guide rod through a hexagon socket head cap screw, the valve body is fixed with a negative pressure filter screen through a third hexagon head cap screw, and the valve body is fixed with a main valve air inlet nozzle through a second gasket and a pipe joint.
Preferably, one side of the valve body is fixedly connected with a main valve guide pipe through a flange plate, and the other end of the main valve pipeline is fixedly connected with the pilot type breather valve guide valve.
Preferably, a guide hole is formed in the valve rod guide sleeve, and the gravity type positive pressure valve clack is embedded in the guide hole.
Preferably, a through hole is formed in the valve cover, and the gravity type negative pressure valve clack is embedded in the through hole.
The utility model has the advantages that:
1. the pilot valve, the main valve film cavity, the outlet body and the valve body are in modular design, and the universality is high.
2. The positive pressure may reach full start at 10% over pressure.
3. The pilot type sealing structure has large discharge amount when the valve is opened.
4. The positive pressure sealing performance is good, and the leakage rate exceeds the requirement of the API2000 standard on the leakage rate when the set pressure of 90 percent is higher than the set pressure.
5. By changing the sealing film material, the applicable temperature range can reach 260 ℃.
6. The material of each part is changed, so that the method is suitable for strong acid and strong alkali media.
Drawings
Fig. 1 is a front cross-sectional view of a pilot operated breather valve according to the present invention;
fig. 2 is an internal schematic view of the pilot-operated breather valve according to the present invention when injecting material;
fig. 3 is an internal schematic view of the pilot-operated breather valve provided by the present invention when extracting material;
fig. 4 is a schematic front view of a prior art breather valve.
In the figure: 1 valve body, 2 studs, 3 first hexagon nuts, 4 outlet bodies, 5 valve rod guide sleeves, 6 first gaskets, 7 round nuts, 8 first hexagon head bolts, 9 perforated gaskets A, 10 gravity type positive pressure valve clacks, 11 perforated gaskets B, 12 guide rods, 13 hexagon socket head screws, 14 valve covers, 15 second hexagon head bolts, 16 perforated gaskets C, 17 gravity type negative pressure valve clacks, 18 negative pressure filter screens, 19 third hexagon head bolts, 20 main valve air inlet nozzles, 21 second gaskets, 22 pipe joints, 23 main valve guide pipes, 24 pilot type breather valve guide valves, 25 main valve upper membrane covers, 26 main valve membranes, 27 fourth hexagon head bolts, 28 spring washers, 29 second hexagon nuts, 30 main valve lower membrane covers of positioning blocks, 31, 32 membrane gaskets, 33 third hexagon nuts and 34 main valve membrane plankers.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, the pilot operated breather valve includes a valve body 1, a stud 2, a first hexagon nut 3, a first gasket 6, a round nut 7, a first hexagon head bolt 8, a gasket with a hole a9, a gasket with a hole B11, an inner hexagon screw 13, a second hexagon head bolt 15, a gasket with a hole C16, a third hexagon head bolt 19, a second gasket 21, a pipe joint 22, a pilot operated breather valve pilot valve 24, a fourth hexagon head bolt 27, a second hexagon nut 29, a diaphragm gasket 32, a third hexagon nut 33, a main valve upper diaphragm cover 25 and a main valve lower diaphragm cover 30, wherein an outlet body 4 is fixed on the valve body 1 through the stud 2 and the first hexagon nut 3, and the gasket with a hole B11 is compressed between the valve body 1 and the outlet body 4; a valve rod guide sleeve 5 is fixedly arranged on the lower main valve membrane cover 30 through a round nut 7, and a gravity type positive pressure valve clack 10 is assembled in the valve rod guide sleeve in a sliding mode; the upper main valve membrane cover 25 and the lower main valve membrane cover 30 are fixedly connected through a fourth hexagon head bolt 27, a spring washer 28 and a second hexagon nut 29, a cavity is formed between the upper main valve membrane cover 25 and the lower main valve membrane cover 30, the lower main valve membrane cover 30 is fixed on the outlet body 4 through a first hexagon head bolt 8, and a porous gasket A9 is tightly pressed and fixed between the outlet body 4 and the lower main valve membrane cover 30; the pilot type breather valve 24 is fixed on the main valve upper membrane cover 25 through thread sealing; a valve cover 14 is fixed on the valve body 1 through a second hexagon head bolt 15, a gravity type negative pressure valve clack 17 is assembled on the valve cover 14 in a sliding mode, and a gasket C16 with holes is fixed between the valve body 1 and the valve cover 14 in a pressing mode; a guide rod B12 is fixed on the valve body 1 through a hexagon socket head cap screw 13, a negative pressure filter screen 18 is fixed on the valve body 1 through a third hexagon head cap screw 19, and a main valve inlet nozzle 20 is fixed on the valve body 1 through a second gasket 21 and a pipe joint 22.
The pilot valve, main valve diaphragm chamber, the outlet body, the valve body modularized design, the commonality is strong, the malleation can reach full-open under 10% surpasses the pressure, guide's formula seal structure, the discharge is big when the valve is opened, the malleation leakproofness is good, it exceeds the requirement of API2000 standard to the leakage rate to set for the pressure leakage rate 90%, through changing the seal membrane material, applicable temperature range high temperature can reach 260 degrees, through changing each spare part material, applicable in strong acid alkali medium.
One side of the valve body 1 is fixedly connected with a main valve guide pipe 23 through a flange, the other end of the main valve pipe is fixedly connected with a pilot type breather valve guide valve 24, a guide hole is formed in the valve rod guide sleeve 5, the gravity type positive pressure valve clack 10 is embedded in the guide hole, a through hole is formed in the valve cover 14, and the gravity type negative pressure valve clack 17 is embedded in the through hole.
In this embodiment, in use, the breather valve is mounted vertically on the top of the tank, with the sealing pair of the breather valve in the closed position. When the external temperature rises or materials are injected, the gas medium in the storage tank expands, the pressure of the gas medium also gradually rises, and if the pressure of the gas medium exceeds the specified positive pressure respiratory value, the exhalation sealing auxiliary valve flap of the valve is opened, and the positive pressure is released. When the pressure in the storage tank is reduced to a specified value, the valve clack is closed in time, as shown in figure 2;
further, when the outside temperature is reduced or materials are extracted, the pressure in the storage tank is reduced and vacuum negative pressure occurs, when a specified negative pressure value is reached, the valve air suction sealing auxiliary valve flap is opened to suck air or nitrogen, and when the pressure in the storage tank and the atmospheric pressure of the outside air are balanced to a specified value, the air suction valve flap is closed to ensure the normal use of the storage tank, as shown in fig. 3.
In addition, the pilot-operated breather valve and the pilot-operated single-breathing valve are composed of a main valve and a pilot valve. The pilot valve is in a diaphragm spring type structure, and the main valve is formed by adding a diaphragm cavity on a breather valve base body. The pilot valve functions to control the pressure of the main valve and the opening and closing of the main valve. The medium enters the upper diaphragm cavity of the main valve through the inlet of the main valve and the pilot valve, and the effective area of the cavity of the main valve is much larger than that of the sealing pair of the valve seat. The pressure of the storage tank acts on the upper surface of the carriage and the main valve seat area. Because of the area ratio, the downward force (main valve diaphragm chamber) is greater than the opening force (valve seat), thus forming a sealed main valve seat.
When the pressure in the tank reaches the set pressure, the upward force on the pilot valve sensing diaphragm overcomes the downward spring force. The pilot valve is opened, and the pressure on the main valve diaphragm cavity is released to the atmosphere, so that the pressure on the upper part of the main valve diaphragm cavity is reduced. Thus, the pressure reduction acting on the main valve seat opens the valve to relieve the overpressure condition.
The adjustment of the adjustment needle may effect a "pop-up" or "adjustable" pilot valve. For the pop-up type, the main valve seat can rise quickly to be fully open.
The main valve remains open (or flowing) as long as the pressure in the tank is higher than the set pressure of the control valve.
When the pressure in the storage tank drops to the reset pressure of the pilot valve, the pilot valve closes and allows the storage tank vapor to flow back to the main valve upper diaphragm chamber. When the pressure of the upper diaphragm chamber rises, the main diaphragm valve is reset and is in a sealing state again.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. The pilot breather valve comprises a valve body (1), a stud (2), a first hexagon nut (3), a first gasket (6), a round nut (7), a first hexagon head bolt (8), a gasket A (9) with holes, a gasket B (11) with holes, an inner hexagon screw (13), a second hexagon head bolt (15), a gasket C (16) with holes, a third hexagon head bolt (19), a second gasket (21), a pipe joint (22), a pilot breather valve pilot valve (24), a fourth hexagon head bolt (27), a second hexagon nut (29), a diaphragm gasket (32), a third hexagon nut (33), a main valve upper diaphragm cover (25) and a main valve lower diaphragm cover (30), it is characterized in that an outlet body (4) is fixed on the valve body (1) through a double-end stud (2) and a first hexagon nut (3), the gasket B (11) with the hole is tightly pressed between the valve body (1) and the outlet body (4);
a valve rod guide sleeve (5) is fixedly arranged on the lower membrane cover (30) of the main valve through a round nut (7), and a gravity type positive pressure valve flap (10) is assembled in the valve rod guide sleeve in a sliding mode;
the upper main valve membrane cover (25) is fixedly connected with the lower main valve membrane cover (30) through a fourth hexagon head bolt (27), a spring washer (28) and a second hexagon nut (29), a cavity is formed between the upper main valve membrane cover (25) and the lower main valve membrane cover (30), the lower main valve membrane cover (30) is fixed on the outlet body (4) through a first hexagon head bolt (8), and the gasket A (9) with holes is pressed and fixed between the outlet body (4) and the lower main valve membrane cover (30);
the pilot type breather valve (24) is fixed on the upper membrane cover (25) of the main valve in a sealing way through threads;
a valve cover (14) is fixed on the valve body (1) through a second hexagon head bolt (15), a gravity type negative pressure valve flap (17) is assembled on the valve cover (14) in a sliding mode, and the gasket C (16) with holes is fixedly pressed between the valve body (1) and the valve cover (14);
a guide rod (B12) is fixed on the valve body (1) through an inner hexagon screw (13), a negative pressure filter screen (18) is fixed on the valve body (1) through a third hexagon bolt (19), and a main valve air inlet nozzle (20) is fixed on the valve body (1) through a second gasket (21) and a pipe joint (22).
2. Pilot breathing valve according to claim 1, characterised in that one side of the valve body (1) is fixedly connected with a main valve guide (23) by means of a flange, the other end of the main valve duct being fixedly connected with the pilot breathing valve guide (24).
3. The pilot-operated breather valve according to claim 1, wherein a guide hole is formed in the stem guide (5), and the gravity-type positive pressure valve flap (10) is embedded in the guide hole.
4. The pilot operated breather valve according to claim 1, wherein the valve cover (14) is provided with a through hole, and the gravity type negative pressure valve flap (17) is embedded in the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022399025.7U CN214197432U (en) | 2020-10-26 | 2020-10-26 | Pilot-operated breather valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022399025.7U CN214197432U (en) | 2020-10-26 | 2020-10-26 | Pilot-operated breather valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214197432U true CN214197432U (en) | 2021-09-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022399025.7U Active CN214197432U (en) | 2020-10-26 | 2020-10-26 | Pilot-operated breather valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214197432U (en) |
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2020
- 2020-10-26 CN CN202022399025.7U patent/CN214197432U/en active Active
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