A kind of positive pressure protection device
Technical field
The utility model relates to the decompression protection field of normal pressure air container tank, is specifically related to a kind of positive pressure protection device that can work in containing the container of corrosive gas.
Background technique
In prior art, positive pressure protection device is mounted on air container tank, when tank body produces the upper limit malleation value of setting, plays decompression protection effect, in case there is a kind of safety installations of security incident to air container.The Intensity Design of every platform air container has one to bear the upper limit for pressure, if tank interior pressure exceedes this numerical value, the serious accident of tank body explosion just may occur.
Especially, in the anaerobic unit in biogas engineering industry, when tank body charging is also stirred time, particularly in summer, because temperature is too high, gas production can be increased suddenly, a large amount of biogas is assembled at tank body rapidly, produces very large tank internal pressure.If now can not give tank body pressure release in time, just to blast possibly, the security incident such as fire, therefore we carry out timely pressure release with positive pressure protection device to tank body, thus ensure the normal operation of anaerobic unit.
In biogas fermentation field, for marsh-gas fermentation tank, owing to containing H in biogas
2the corrosive gass such as S, according to common anti-corrosion mode, will fall inhalation valve corrosion in a short period of time, thus have impact on the normal operation of positive pressure protection device.At present, go back neither one and can adapt to work in above-mentioned condition, and the positive pressure protection device of whole set process safe operation can be ensured.
Model utility content
For solving the problems of the technologies described above, the utility model provides that a kind of pressure is visible, pressure is adjustable, can according to engineering site actual demand, the positive pressure protection device of regulation and control CLV ceiling limit value.
The technical solution of the utility model is: a kind of positive pressure protection device, the installation plectane comprising outer cover end socket, cylindrical housings, transition connecting pipe from top to bottom successively and be socketed in outside transition connecting pipe; Described housing internal upper part is fixedly installed adjustment support, and regulate the center of support to be flexibly connected with Regulation spring one end by adjusting screw rod, the other end and the bonnet center of Regulation spring are fixedly linked; In described housing, bottom is fixedly installed the bottom flange sealed, and bottom flange is movably connected by directional post hard-wired on it and bonnet; The sealing surface place of the central through bore of described bottom flange is provided with the arc convex extended to bonnet; Described bottom flange and inner walls connecting place have flow-off.
Preferred version is as follows:
Transition connecting pipe sidewall is connected with pressure gauge.Pressure gauge can not only show the pressure values in tank body in real time, can obtain the CLV ceiling limit value of valve gap pressure from pressure gauge simultaneously.According to engineering site actual demand, can carry out scene determine its CLV ceiling limit value, such design is avoided debugging in advance and scene does not meet the drawback of use.
The all parts of positive pressure protection device adopt stainless steel or adopt carbon steel and carry out electrophoresis preservative treatment to it.Adopt this material or spraying coating process, the not corrosion resistant shortcoming of general pressure valve can be overcome, make it can not only be applied in various normal pressure gas storage tank body and carry out pressure release, can also be applied in and have in corrosive operating conditions.Such as, in marsh-gas fermentation tank, owing to containing H in biogas
2s corrosive gas, if with common anti-corrosion mode, pressure valve corrosion will be fallen in a short period of time, thus affects the normal work of positive pressure protection device.And the equipment adopting stainless steel or the carbon steel after the spraying of electrophoresis powder injection process to make can be stable work in this condition, thus ensure that the safe operation of whole set process.
Wherein, the design of flow-off is to prevent when weather is colder, after the moisture in gas solidifies, by adhesion freezing between bonnet and bottom flange, causes positive pressure protection device can not normal operation, thus loses protective action; Moisture in gas is discharged by the design of flow-off in time, ensures that Whole Equipment runs.
Working principle: positive pressure protection device is according to the pressure release value of fermentation tank technique initialization in advance, select the extending amount of Regulation spring, select the specification of bonnet to adjust integral pressure proportioning simultaneously, when tank internal pressure reaches bonnet upper limit set value (general CLV ceiling limit value is set as positive 4kpa), tank internal pressure is by impelling Regulation spring to extend to the reaction force of bonnet or shrinking, thus realize the to-and-fro motion of bonnet, gas is then released from the space between bonnet and bottom flange, thus reaches the function of automatic on-off pressure release; Simultaneously due to the existence of directional post, make bonnet in movement process, movement locus is fixed, and prevents bonnet from offseting.
The utility model has the advantages that: structure is simple, and durable in use, pressure is visible, pressure is adjustable, practicability is very strong, industrially can promote the use of.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
In figure: 1, outer cover end socket, 2, transition connecting pipe, 3, plectane is installed, 4, Regulation spring, 5, adjusting screw rod, 6, regulate support, 7, housing, 8, bonnet, 9, bottom flange, 10, flow-off, 11, pressure gauge.
Embodiment
Below in conjunction with Fig. 1, the present embodiment is described in further detail, but the utility model is not limited to specific embodiment.
Embodiment 1:
A kind of positive pressure protection device, the installation plectane 3 comprising outer cover end socket 1, cylindrical housings 7, transition connecting pipe 2 from top to bottom successively and be socketed in outside transition connecting pipe 2; Described housing 7 internal upper part is fixedly installed and regulates support 6, and regulate the center of support 6 to be flexibly connected with Regulation spring 4 one end by adjusting screw rod 5, the other end and bonnet 8 center of Regulation spring 4 are fixedly linked; In described housing 7, bottom is fixedly installed the bottom flange 9 sealed, and bottom flange 9 is movably connected by directional post hard-wired on it and bonnet 8; The sealing surface place of the central through bore of described bottom flange 9 is provided with the arc convex extended to bonnet 8; Described bottom flange 9 has flow-off with housing 7 inwall connecting place.
Transition connecting pipe 2 sidewall is connected with pressure gauge 11.Pressure gauge 11 can not only show the pressure values in tank body in real time, can obtain the CLV ceiling limit value of valve gap pressure from pressure gauge 11 simultaneously.According to engineering site actual demand, can carry out scene determine its CLV ceiling limit value, such design is avoided debugging in advance and scene does not meet the drawback of use.
The all parts of positive pressure protection device adopt stainless steel or adopt carbon steel and carry out electrophoresis preservative treatment to it.Adopt this material or spraying coating process, the not corrosion resistant shortcoming of general pressure valve can be overcome, make it can not only be applied in various normal pressure gas storage tank body and carry out pressure release, can also be applied in and have in corrosive operating conditions.Such as, in marsh-gas fermentation tank, owing to containing H in biogas
2s corrosive gas, if with common anti-corrosion mode, pressure valve corrosion will be fallen in a short period of time, thus affects the normal work of positive pressure protection device.And the equipment adopting stainless steel or the carbon steel after the spraying of electrophoresis powder injection process to make can be stable work in this condition, thus ensure that the safe operation of whole set process.
Wherein, the design of flow-off 10 is to prevent when weather is colder, after the moisture in gas solidifies, by adhesion freezing between bonnet 8 and bottom flange 9, causes positive pressure protection device can not normal operation, thus loses protective action; Moisture in gas is discharged by the design of flow-off 10 in time, ensures that Whole Equipment runs.
Working principle: positive pressure protection device is according to the pressure release value of fermentation tank technique initialization in advance, select the extending amount of Regulation spring 4, the specification simultaneously controlling bonnet 8 adjusts integral pressure proportioning, when tank internal pressure reaches bonnet 8 upper limit set value (general CLV ceiling limit value is set as positive 4kpa), tank internal pressure is by impelling Regulation spring 4 to extend or shrink to the reaction force of bonnet 8, thus realize the to-and-fro motion of bonnet 8, gas is then released from the space between bonnet 8 and bottom flange 9, thus reaches the function of automatic on-off pressure release; Simultaneously due to the existence of directional post, make bonnet 8 in movement process, movement locus is fixed, and prevents bonnet 8 from offseting.
The utility model has the advantages that: structure is simple, and durable in use, pressure is visible, pressure is adjustable, practicability is very strong, industrially can promote the use of.
Above-described is only preferred implementation of the present utility model, should be understood that for a person skilled in the art, under the prerequisite not departing from the utility model structure, can also make some distortion and improvement, these all can not affect effect and the practical applicability of the utility model enforcement.