CN112013143B - Fire-retardant type breather valve for stratum water storage tank - Google Patents
Fire-retardant type breather valve for stratum water storage tank Download PDFInfo
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- CN112013143B CN112013143B CN201910462424.2A CN201910462424A CN112013143B CN 112013143 B CN112013143 B CN 112013143B CN 201910462424 A CN201910462424 A CN 201910462424A CN 112013143 B CN112013143 B CN 112013143B
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- storage tank
- water storage
- hydraulic oil
- overflow channel
- breather valve
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The invention relates to the field of storage tank breather valves, in particular to a fire-retardant breather valve for a formation water storage tank, which comprises a shell, wherein an exhaust port is arranged on the shell, an overflow channel is arranged in the shell, hydraulic oil is filled in the overflow channel, the fire-retardant breather valve also comprises a gas pipeline extending into the shell, the gas pipeline is communicated with the formation water storage tank, a gas inlet is arranged on the gas pipeline, the gas inlet is positioned above the liquid level of the hydraulic oil, the gas inlet is communicated with the initial end of the overflow channel, the exhaust port is communicated with the tail end of the overflow channel, so that gas input from the gas inlet is output from the exhaust port after passing through the overflow channel, the gas output from the formation water storage tank can be output from the exhaust port after passing through the overflow channel filled with the hydraulic oil, and the fire prevention effect and the pollution prevention effect of the breather valve with the structure are improved, the whole structure is simple, the weight is light, the preparation cost is low, complex maintenance and overhaul are not needed, and the method is suitable for large-area popularization and application.
Description
Technical Field
The invention relates to the field of storage tank breather valves, in particular to a fire-retardant breather valve for a formation water storage tank.
Background
At natural gas production and transportation well station, can set up the stratum water storage tank in the station and be used for collecting the storage to adopt the sewage that the defeated in-process produced, be convenient for transport the processing through the transportation tank car, because these sewage can be continuous in the storage process and separate out the stratum gas, lead to the storage tank internal gas pressure higher easily, so, in order to guarantee the normal use of stratum water storage tank, generally can set up the breather valve on the stratum water storage tank, make the gas escape in the storage tank, avoid storage tank pressure too big to cause the damage to the storage tank.
However, in the breather valve of the existing formation water storage tank, a mechanical structure provided with a pressure valve disc and a negative pressure valve disc is usually adopted in an internal air flow channel to realize the control of the gas flow direction, so that the movement of the pressure valve disc and the negative pressure valve disc is realized through the internal and external pressure difference, and further the communication and/or the cut-off of the air flow channel are realized, which causes the breather valve to have larger integral volume, heavier weight, complex structure, higher preparation cost and no fireproof effect.
In summary, there is a need for a technical solution to solve the technical problems of the existing breather valve on the formation water storage tank, such as large volume, heavy weight, complex structure, high manufacturing cost, no fireproof effect, inability to process the output gas, and increased fire risk.
Disclosure of Invention
The invention aims to: the fire-retardant breather valve for the stratum water storage tank is small in size, light in weight, simple in structure, low in preparation cost, capable of achieving the fire-retardant effect and treating the output gas, and capable of solving the technical problems of increasing fire risks.
In order to achieve the purpose, the invention adopts the technical scheme that:
fire-retardant type breather valve is used to formation water storage tank, which comprises a housin, be provided with the gas vent on the casing, be provided with the overflow passageway in the casing, the filling has hydraulic oil in the overflow passageway, still including extending to gas transmission pipeline in the casing, gas transmission pipeline and formation water storage tank intercommunication, be provided with the air inlet on the gas transmission pipeline, the air inlet is located more than the hydraulic oil liquid level, the air inlet with overflow passageway's top intercommunication, the gas vent with overflow passageway's terminal intercommunication makes the follow the gaseous process of air inlet input follow behind the overflow passageway the gas vent is exported.
The fire-retardant breather valve for the formation water storage tank leads the gas separated out from the formation water storage tank to be above the liquid level of the hydraulic oil in the shell through the gas transmission pipeline, so that the gas output from the formation water storage tank can be output from the gas outlet after passing through the overflow channel filled with the hydraulic oil, on one hand, soluble substances in the gas are absorbed or decomposed by the hydraulic oil or chemical agents in the hydraulic oil, the output gas is prevented from polluting the environment, the anti-pollution effect of the breather valve with the structure is improved, on the other hand, the hydraulic oil plays a role in blocking, impurities or fire sources in the external environment are prevented from entering the formation water storage tank from the gas outlet, the fireproof effect of the breather valve with the structure is improved, meanwhile, the overflow channel filled with the hydraulic oil is adopted to realize the control of the output airflow transmission, and various valve discs are not required to be arranged on the breather valve with the structure, the integral structure is simple, the weight is light, the preparation cost is low, complex maintenance and overhaul are not needed, and the device is suitable for large-area popularization and application in natural gas extraction and transportation well stations.
Preferably, a plurality of partition plates are arranged in the shell, the partition plates divide the inner space of the shell into a plurality of chambers, and the chambers are sequentially communicated in a staggered mode to form the overflow channel. The overflow channel is formed by combining a plurality of chambers which are formed by adopting the partition plates in a separating way, so that the structure of the overflow channel is simple, and the preparation and the use of the breather valve with the structure are convenient.
Preferably, a partition plate is arranged in the shell, and a communication hole is formed between the partition plate and the bottom of the shell, so that the partition plate divides the inner space of the shell into a liquid storage cavity and an overflow cavity which are communicated with each other. Through the intercommunication mode in stock solution chamber and overflow chamber for the gas of following the air inlet input can promote the hydraulic oil entering overflow chamber in the stock solution intracavity, and passes and export from the gas vent behind the hydraulic oil, guarantees to pass hydraulic oil completely from the gas of air inlet input, receives the processing of better effect, avoids the polluted environment.
Preferably, the bottom of the gas pipeline is communicated with the formation water storage tank, the top of the gas pipeline is provided with a sealing plate, and the partition plate is vertically connected with the sealing plate. Through setting up the shrouding on gas transmission pipeline to set up the baffle on the shrouding, make setting up of baffle more convenient, easier realization casing inner space's separation makes overflow channel's formation easier, makes things convenient for the preparation of the breather valve of this structure.
Preferably, a blocking mechanism for blocking the hydraulic oil output from the exhaust port is further arranged in the shell, the blocking mechanism comprises a box body and a filtering mechanism arranged in the box body, and a plurality of vent holes penetrating through the box body are formed in the box body. Through setting up the arresting mechanism, make the arresting mechanism play the effect of gas-liquid separation, the dispersion gets into the gaseous hydraulic oil that contains of arresting mechanism, makes gaseous easy the passing filter unit after dispersed and discharges, and liquid descends to fall back to the overflow passageway in self action of gravity, avoids hydraulic oil to be pushed out in the casing under the atmospheric pressure effect, realizes the long-time normal work of the breather valve of this structure.
Preferably, the filter means is made of steel wool. The filtering mechanism made of the steel wire balls can enable impurities in the hydraulic oil to stay in the filtering mechanism, so that the impurities in the overflow channel are less, and the gas separated from the formation water storage tank can smoothly pass through the hydraulic oil.
Preferably, the blocking mechanism is matched with the inner wall of the housing, and an anti-overflow space is arranged between the blocking mechanism and the sealing plate. Through setting up anti-overflow space for there is great flow space hydraulic oil from overflow channel output back, avoids hydraulic oil to spill over from the gas vent under the atmospheric pressure effect, guarantees the long-time normal use of the breather valve of this structure.
Preferably, the top of the shell is provided with a plurality of support rods, the support rods are detachably connected with top covers, and the exhaust ports are formed in the shell and between the top covers. Carry out good protection to the casing through setting up the top cap, avoid external environment's impurity or burning things which may cause a fire disaster to carry out in the casing from the gas vent, guarantee the normal use of the breather valve of this structure.
Preferably, the hydraulic oil level monitoring device further comprises a liquid level detection mechanism, wherein the liquid level detection mechanism is communicated with the overflow channel and used for monitoring the liquid level position of hydraulic oil in the overflow channel. Set up liquid level detection device, the volume of hydraulic oil in the real-time detection overflow channel makes when the hydraulic oil liquid level is too high, through the gas in the quick discharge stratum water storage tank of other modes, avoids the hydraulic oil loss to guarantee the safe handling of stratum water storage tank.
Preferably, the bottom of the shell is also provided with a sewage draining outlet, the sewage draining outlet is connected with a sewage draining pipe, and the sewage draining pipe is provided with a valve which can be opened and/or closed. And a sewage draining outlet is arranged, so that the impurities accumulated in the overflow channel can be conveniently drained.
In conclusion, the fire-retardant breather valve for the formation water storage tank has the advantages that:
1. gas output from the formation water storage tank can be output from the exhaust port after passing through the overflow channel filled with hydraulic oil, so that soluble substances in the gas are absorbed or decomposed by the hydraulic oil or chemical agents in the hydraulic oil, the output gas is prevented from polluting the environment, and the effect of protecting the environment is achieved;
2. the hydraulic oil has the blocking effect, and impurities or fire sources in the external environment are blocked from entering the formation water storage tank from the exhaust port, so that the use safety of the storage tank is improved;
3. because the overflow channel filled with hydraulic oil is adopted to realize the control of output airflow conveying, the breather valve of the structure does not need to be provided with various valve discs, the whole structure is simple, the weight is light, the preparation cost is low, complex maintenance is not needed, and the breather valve is suitable for large-area popularization and application in natural gas extraction and transportation well stations.
Drawings
FIG. 1 is a schematic structural view of a fire barrier type breather valve for a formation water storage tank of example 1;
FIG. 2 is a schematic structural view taken along section A-A in FIG. 1;
FIG. 3 is a schematic structural view of a fire barrier type breather valve for a formation water storage tank according to example 2;
FIG. 4 is a schematic cross-sectional view of a fire barrier type breather valve for a formation water storage tank according to example 2;
FIG. 5 is a schematic cross-sectional view of a fire barrier type breather valve for a formation water storage tank according to example 3;
FIG. 6 is a schematic structural view of the blocking mechanism according to embodiment 3;
fig. 7 is a schematic structural view showing a state in which the fire retardant type breather valve for a formation water storage tank according to the present invention is used.
Reference numerals
1-shell, 11-exhaust port, 12-liquid storage cavity, 13-overflow cavity, 14-anti-overflow space, 15-blow-off pipe, 2-hydraulic oil, 3-gas transmission pipeline, 31-gas inlet, 32-sealing plate, 33-connecting rod, 34-limiting block, 4-clapboard, 5-communicating hole, 6-stopping mechanism, 61-box body, 62-filtering mechanism, 63-vent hole, 7-support rod, 8-top cover, 9-liquid level detection mechanism and 10-formation water storage tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-2, 7, back-fire relief type breather valve is used to formation water storage tank, including casing 1, be provided with gas vent 11 on the casing 1, be provided with two baffles 4 in the casing 1, baffle 4 will the inner space of casing 1 separates for three cavity, the cavity misplaces the intercommunication in proper order and forms overflow passageway, the filling has hydraulic oil 2 in the overflow passageway, still including extending to gas transmission pipeline 3 in the casing 1, gas transmission pipeline 3 and formation water storage tank 10 intercommunication, be provided with air inlet 31 on the gas transmission pipeline 3, air inlet 31 is located more than the 2 liquid levels of hydraulic oil, air inlet 31 with overflow passageway's top intercommunication, gas vent 11 with overflow passageway's terminal intercommunication, the messenger follows the gas process of air inlet 31 input follows behind the overflow passageway 11 output of gas vent.
Fire-retardant type breather valve is used to formation water storage tank of this embodiment, preferentially the casing is the cask form, gas transmission pipeline 3 runs through 1 bottom of casing, one end and 10 flange joint of formation water storage tank, the other end extend to more than the 2 liquid levels of hydraulic oil, will through vertical baffle 4 of placing in the casing 1 the inner space partition of casing 1 is three cavity, through the intercommunicating pore 5 intercommunication of dislocation set on baffle 4 between the two adjacent cavities, just intercommunicating pore 5 on the baffle 4 is located below the 2 liquid levels of hydraulic oil, forms the overflow channel that is linked together along air inlet 31 to gas vent 11, sets up the air inlet 31 of gas transmission pipeline 3 in the cavity at overflow channel top place, and gas vent 11 on the casing 1 sets up on the cavity at overflow channel tail end place, makes the gas of following formation water storage tank 10 output must pass the filling have 2 overflow channel after just can follow gas vent 11 outputs, make gaseous obtaining preliminary purification in hydraulic oil 2, play the effect of environmental protection, simultaneously, in impurity or the fire source that blocks in the external environment through hydraulic oil 2 gets into formation water storage tank 10 from gas vent 11, play good safeguard effect, in addition, reduced the mechanical valve disc structure in the conventional breather valve, make the breather valve simple structure of this structure, preparation convenience, cost are lower, it is more convenient to use.
Preferably, the top of the cylindrical shell 1 is in an open form, a plurality of support rods 7 are arranged at the top of the shell 1, and a top cover 8 is detachably connected to the support rods 7, so that the exhaust port 11 is formed between the top cover 8 and the shell 1. In the embodiment, the casing 1 with an open top is adopted, so that the exhaust port 11 for outputting gas on the casing 1 is larger, smooth output of gas is ensured, and meanwhile, because the outlet port 11 is larger than the outlet port of the overflow channel, the hydraulic oil containing gas is influenced by the external air pressure and the self gravity at the outlet port 11 and is not easy to overflow from the outlet port 11, and the gas in the hydraulic oil 2 is less influenced by the external air pressure, rises rapidly in the hydraulic oil 2, is separated from the hydraulic oil 2 by bubble shape and then is output from the exhaust port 11, so that the gas-liquid separation is realized through the arrangement of the large-size exhaust port 11, the long-time normal work of the breather valve is ensured, in addition, still set up top cap 8 and carry out good protection to casing 1, avoid external environment's impurity or fire source to carry out casing 1 from gas vent 11 in, further guarantee the fire prevention effect of the breather valve of this structure.
Example 2
As shown in fig. 3 to 4 and 7, the fire-retardant type breather valve for a formation water storage tank of the present embodiment has the same structure as that of embodiment 1, except that: be provided with a baffle 4 in the casing 1, baffle 4 with be provided with intercommunicating pore 5 between the bottom of casing 1, baffle 4 will the inner space partition of casing 1 is liquid storage cavity 12 and the overflow chamber 13 of mutual intercommunication, 3 bottoms of gas transmission pipeline communicate with stratum water storage tank 10, and the top extends into in the liquid storage cavity 12 to be provided with shrouding 32 at the top of gas transmission pipeline 3, baffle 4 with shrouding 32 is perpendicular to be connected.
The fire-retardant breather valve for the formation water storage tank of the embodiment is characterized in that the sealing plate 32 is preferably larger than the cross section of the gas transmission pipeline 3, so that the vertically arranged partition plate 4 is conveniently connected to the bottom surface of the sealing plate 32, the partition plate 4 divides a cavity between the gas transmission pipeline 3 and the inner wall of the shell 1 into a liquid storage cavity 12 and an overflow cavity 13, a gap is reserved between the bottom of the partition plate 4 and the inner bottom surface of the shell 1 to form a communication hole 5 for communicating the liquid storage cavity 12 with the overflow cavity 13, a plurality of gas inlets 31 are arranged on the side wall of the gas transmission pipeline 3, so that gas separated out from the formation water storage tank 10 enters the liquid storage cavity 12 through the gas inlets 31, then enters the overflow cavity 13 after passing through the communication hole 5, finally is output from the gas outlet 11 at the top of the overflow cavity 13 to realize gas output, and corresponding agents capable of decomposing or absorbing the gas separated out from the formation water storage tank 10 are added into the hydraulic oil 2 according to actual conditions, the gas and the hydraulic oil 2 flow through the same channel, so that the gas discharged into the air is purified, the air pollution is reduced, meanwhile, the anti-explosion effect of the breather valve with the structure is improved through the blocking effect of the hydraulic oil 2, and the breather valve with the structure is suitable for being used in natural gas gathering and transportation stations.
Preferably, the liquid level detection device further comprises a liquid level detection mechanism 9, wherein the liquid level detection mechanism 9 is arranged on the outer wall of the shell 1 and is communicated with the overflow cavity 13. Through setting up liquid level detection mechanism 9, make more audio-visual follow the highest liquid level position that observes hydraulic oil 2 in the casing 1 in the vision, conveniently when the liquid level position is too high, in time take other exhaust mode with gaseous discharge in the stratum water storage tank 10, avoid hydraulic oil 2 to lose to guarantee the safe handling of stratum water storage tank 10.
Preferably, the bottom of the shell 1 is further provided with a sewage draining outlet, the sewage draining outlet is connected with a sewage draining pipe 15, and the sewage draining pipe 15 is provided with a valve capable of being opened and/or closed. The arrangement of the blow-off pipe 15 facilitates the discharge of impurities accumulated in the overflow channel.
Example 3
As shown in fig. 5 to 7, the fire-retardant type breather valve for a formation water storage tank of the present embodiment has the same structure as that of embodiment 2, except that: the hydraulic oil filter is characterized in that a blocking mechanism 6 for blocking the hydraulic oil 2 output from the exhaust port 11 is further arranged in the shell 1, the blocking mechanism 6 comprises a box body 61 and a filtering mechanism 62 arranged in the box body 61, and a plurality of vent holes 63 penetrating through the box body 61 are formed in the box body 61.
The fire-retardant breather valve for the formation water storage tank of this embodiment is preferred pack a plurality of steel wire balls as filter mechanism 62 in box 61, make the dispersion of arresting mechanism 6 get into the gaseous hydraulic oil 2 that contains in the box 61, gaseous passing filter mechanism 62 after dispersed is easier discharges, liquid descends to fall back to the overflow passageway in self action of gravity, avoid hydraulic oil 2 to be pushed out gas vent 11 in casing 1 under the atmospheric pressure effect, realize the long-time normal work of the breather valve of this structure, filter mechanism simple structure, the cost is lower, the source is wider, can also make the impurity among the hydraulic oil 2 stop in filter mechanism 62, make the interior impurity of overflow passageway reduce, guarantee gaseous smooth wearing out.
Preferably, the arresting mechanism 6 is engaged with an inner wall of the housing 1, and an anti-overflow space 14 is provided between the arresting mechanism 6 and the sealing plate 32. In this embodiment, preferably, the sealing plate 32 is provided with a connecting rod 33 penetrating through the blocking mechanism 6, the connecting rod 33 is provided with a limiting block 34, the blocking mechanism 6 is arranged on the limiting block 34, an anti-overflow space 14 is formed between the blocking mechanism 6 and the sealing plate 32, so that the hydraulic oil 2 overflowing from the overflow cavity 13 is dispersed in the anti-overflow space 14, the gas in the hydraulic oil 2 is separated out from the hydraulic oil 2 and is exhausted into the air after passing through the blocking mechanism 6, further, the hydraulic oil 2 is prevented from overflowing from the exhaust port 11 at the top of the housing 1 after passing through the blocking mechanism 6, and the long-term stable operation of the breather valve of this structure is ensured.
The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and although the present invention has been described in detail by referring to the above embodiments, the present invention is not limited to the above embodiments, and therefore, any modifications or equivalent substitutions may be made to the present invention, and all technical solutions and modifications without departing from the spirit and scope of the invention should be covered by the claims of the present invention.
Claims (5)
1. Fire relief type breather valve for stratum water storage tank, its characterized in that: including casing (1), the casing top is uncovered form, sets up a plurality of bracing pieces at the casing top, can dismantle on bracing piece (7) and be connected with top cap (8) form gas vent (11) between top cap and the casing, be provided with a plurality of baffles (4) in casing (1), baffle (4) will the inner space of casing (1) separates for a plurality of cavities, forms overflow channel, the filling has hydraulic oil (2) in the overflow channel, still including extending to gas transmission pipeline (3) in casing (1), gas transmission pipeline (3) bottom and formation water storage tank (10) intercommunication, and the top is provided with shrouding (32), baffle (4) with shrouding (32) are connected perpendicularly, be provided with air inlet (31) on the lateral wall of gas transmission pipeline (3), air inlet (31) are located hydraulic oil (2) liquid level above, the air inlet (31) is communicated with the initial end of the overflow channel, the air outlet (11) is communicated with the tail end of the overflow channel, so that air input from the air inlet (31) passes through the overflow channel and then is output from the air outlet (11), a blocking mechanism (6) for blocking hydraulic oil (2) output from the air outlet (11) is further arranged in the shell (1), the blocking mechanism (6) comprises a box body (61) and a filtering mechanism (62) arranged in the box body (61), a plurality of vent holes (63) penetrating through the box body (61) are formed in the box body (61), the filtering mechanism (62) is made of steel wire balls, a connecting rod penetrating through the blocking mechanism is arranged on a sealing plate, a limiting block is arranged on the connecting rod, the blocking mechanism is arranged on the limiting block, and the blocking mechanism (6) is matched with the inner wall of the shell (1), an overflow-proof space (14) is provided between the arresting means (6) and the closing plate (32).
2. A fire retardant breather valve for a formation water storage tank as defined in claim 1, wherein: the chambers are communicated in sequence in a staggered manner to form the overflow channel.
3. A fire retardant breather valve for a formation water storage tank as defined in claim 1, wherein: a partition plate (4) is arranged in the shell (1), a communicating hole (5) is formed between the partition plate (4) and the bottom of the shell (1), and the partition plate (4) enables the inner space of the shell (1) to be divided into a liquid storage cavity (12) and an overflow cavity (13) which are communicated with each other.
4. A fire retardant breather valve for a formation water storage tank as defined in claim 1, wherein: still include liquid level detection mechanism (9), liquid level detection mechanism (9) with overflow channel intercommunication monitors hydraulic oil (2) liquid level position in the overflow channel.
5. A fire retardant breather valve for a formation water storage tank as defined in claim 1, wherein: the bottom of the shell (1) is also provided with a sewage draining outlet, the sewage draining outlet is connected with a sewage draining pipe (15), and the sewage draining pipe (15) is provided with a valve which can be opened and/or closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910462424.2A CN112013143B (en) | 2019-05-30 | 2019-05-30 | Fire-retardant type breather valve for stratum water storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910462424.2A CN112013143B (en) | 2019-05-30 | 2019-05-30 | Fire-retardant type breather valve for stratum water storage tank |
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| CN112013143A CN112013143A (en) | 2020-12-01 |
| CN112013143B true CN112013143B (en) | 2022-05-24 |
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| CN2150413Y (en) * | 1993-03-23 | 1993-12-22 | 中国石化北京设计院 | Fire-retardant breather valve for oil tank |
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| CN202327270U (en) * | 2011-08-18 | 2012-07-11 | 翟佑华 | Liquid seal dual-purpose valve for breathing and fire retarding |
| CN204372251U (en) * | 2014-12-19 | 2015-06-03 | 茂名西南石化机械设备有限公司 | A kind of dustproof and anti-explosion inhalation valve |
| CN204756054U (en) * | 2015-05-29 | 2015-11-11 | 西南石油大学 | Novel piston back -fire relief breather valve |
| CN204751096U (en) * | 2015-03-13 | 2015-11-11 | 陆威延 | Oil storage tank numeral table shows frostproofing hydraulic pressure formula relief valve of oil blanket liquid level |
| CN205991210U (en) * | 2016-07-25 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of deadweight safety valve |
| CN207333858U (en) * | 2017-09-22 | 2018-05-08 | 中国石油天然气股份有限公司 | Deadweight safety valve and oil tank |
| CN108167489A (en) * | 2017-12-06 | 2018-06-15 | 浙江海洋大学 | A kind of antifreeze anti-sticking breather valve |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150413Y (en) * | 1993-03-23 | 1993-12-22 | 中国石化北京设计院 | Fire-retardant breather valve for oil tank |
| CN2209746Y (en) * | 1994-02-06 | 1995-10-11 | 张庆芳 | Mechanical expiration hydraulic safety valve |
| DE29812679U1 (en) * | 1998-07-16 | 1998-10-01 | Stihl Maschf Andreas | Pressure compensation system for a fuel tank of an internal combustion engine, in particular for hand-held, portable tools |
| DE20201585U1 (en) * | 2002-02-02 | 2002-07-25 | Systemtechnik Herzog Gmbh | Stimulator fitting |
| CN201155602Y (en) * | 2008-01-25 | 2008-11-26 | 温涛 | Petroleum storage tank explosion-proof fire retardant hydraulic safety valve |
| CN202107249U (en) * | 2011-06-21 | 2012-01-11 | 李世强 | Liquid division type hydraulic relief valve |
| CN202327270U (en) * | 2011-08-18 | 2012-07-11 | 翟佑华 | Liquid seal dual-purpose valve for breathing and fire retarding |
| CN204372251U (en) * | 2014-12-19 | 2015-06-03 | 茂名西南石化机械设备有限公司 | A kind of dustproof and anti-explosion inhalation valve |
| CN204751096U (en) * | 2015-03-13 | 2015-11-11 | 陆威延 | Oil storage tank numeral table shows frostproofing hydraulic pressure formula relief valve of oil blanket liquid level |
| CN204756054U (en) * | 2015-05-29 | 2015-11-11 | 西南石油大学 | Novel piston back -fire relief breather valve |
| CN205991210U (en) * | 2016-07-25 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of deadweight safety valve |
| CN207333858U (en) * | 2017-09-22 | 2018-05-08 | 中国石油天然气股份有限公司 | Deadweight safety valve and oil tank |
| CN108167489A (en) * | 2017-12-06 | 2018-06-15 | 浙江海洋大学 | A kind of antifreeze anti-sticking breather valve |
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| CN112013143A (en) | 2020-12-01 |
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