CN207989827U - A kind of micro-pressure-difference conducting low flow velocity check valve - Google Patents
A kind of micro-pressure-difference conducting low flow velocity check valve Download PDFInfo
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- CN207989827U CN207989827U CN201820385735.4U CN201820385735U CN207989827U CN 207989827 U CN207989827 U CN 207989827U CN 201820385735 U CN201820385735 U CN 201820385735U CN 207989827 U CN207989827 U CN 207989827U
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Abstract
A kind of micro-pressure-difference conducting low flow velocity check valve, belongs to check valve technical field.It is characterized in that：Including valve body（3）, valve body（3）Both sides are correspondingly provided with output port and input port, valve body（3）It is internally provided with air inlet pipe（10）, air inlet pipe（10）Inner cavity forms preceding inlet chamber（8）, air inlet pipe（10）The valve body in outside（3）Inner cavity forms rear outlet chamber（9）, preceding inlet chamber（8）One end is connected to input port, and being equipped with unidirectional gravity force at the top of the other end adsorbs sealing device.The utility model is isolated in valve inner using air inlet pipe, it is isolated into preceding inlet chamber and rear outlet chamber, and unidirectional gravity force is set on preceding inlet chamber input port and adsorbs sealing device, formation irreversibly delivers, and suitable for the gas circulation of micro-pressure-difference conducting, gas barrier effect is good, thoroughly prevents collaborating between multiple air accumulators.
Description
Technical field
A kind of micro-pressure-difference conducting low flow velocity check valve, belongs to check valve technical field.
Background technology
Low flow velocity check valve, which is connected, in micro-pressure-difference is mounted on for the breathing gas recovering device of the industries wet tank such as chemical industry
In the collection conduit of tidal air, for the unidirectionally controlled of low flow velocity gas.When storage tank is increased because of environment temperature, gas phase is empty in tank
Between gas expansion, pressure of storage tank increase, gas needs let-down vessel to enter tidal air collection conduit, when storage tank rewinding, storage tank
Gas-phase space is compressed, and pressure of storage tank increases, and gas also needs let-down vessel and enters tidal air collection conduit, causes check valve
Preceding tidal air collection conduit pressure rise.But currently, check valve in the prior art since self structure is not reasonable, is opened
Pressure is big, and sealing effect is bad, and when the gas collection line connection for having multiple storage tanks, the gas being susceptible between storage tank is mutually gone here and there, storage tank
The contaminated situation of interior material.
Invention content
Technical problem to be solved in the utility model is：It overcomes the deficiencies of the prior art and provide a kind of simple in structure, close
Envelope property is good, gas barrier effect is good, prevents the micro-pressure-difference collaborated conducting low flow velocity check valve.
The utility model solve its technical problem the technical solution adopted is that：Low flow velocity check valve is connected in the micro-pressure-difference,
It is characterized in that：It is correspondingly provided with output port and input port including valve body, valve body both sides, valve inner is equipped with air inlet pipe, air inlet
Tube cavity forms preceding inlet chamber, and the body cavity on the outside of air inlet pipe forms rear outlet chamber, and preceding inlet chamber one end is connected to input port,
It is equipped with unidirectional gravity force at the top of the other end and adsorbs sealing device.
The utility model changes the structure type of traditional check valve, is isolated using air inlet pipe in valve inner, every
From at preceding inlet chamber and rear outlet chamber, and unidirectional gravity force is set on preceding inlet chamber input port and adsorbs sealing device so that, from
The gas that input port enters air inlet pipe can be exported smoothly from output port, and the gas that air inlet pipe is entered from output port can not
It is exported from input port, formation irreversibly delivers, and suitable for the gas circulation of micro-pressure-difference conducting, gas barrier effect is good, thoroughly
Prevent collaborating between multiple air accumulators.
The unidirectional gravity force absorption sealing device includes fixing axle, limit diaphragm and fixed orifice plate, and fixed orifice plate is fixed
In air inlet pipe outlet, limit diaphragm is covered at the top of fixed orifice plate, and middle part is fixedly connected with fixation by fixing axle
Orifice plate.
Due to the limit diaphragm dead weight very little of check valve, as long as unidirectional upstream pressure is more than downstream pressure, formation overcomes mantle
The minute-pressure of piece gravity, limit diaphragm is upwardly-deformed, and fixed orifice plate trepanning is opened, and gas flows out valve body by fixed orifice plate, into receipts
Collection manifold is directly entered breathing Flash Gas Compression Skid System.When storage tank because environment temperature reduces, gas-phase space contraction of gas in tank, storage tank
When pressure reduction or material delivering, storage tank gas-phase space increases, and pressure of storage tank reduces, and can cause unidirectional upstream pressure less than single at this time
To downstream pressure, limit diaphragm encloses fixed orifice plate, the gas after check valve cannot return because being covered in fixed orifice plate from gravity
Flow to storage tank.When the gas collection line connection for there are multiple storage tanks, gas barrier is just carried out by respective check valve, will not have been formed
Gas between storage tank is mutually gone here and there, to which the material ensured in storage tank is not contaminated.
For the spatter property of fluid, filter device can be increased in input port, prevent foreign matter to be attached on limit diaphragm, lead
It causes diaphragm that cannot close orifice bore, causes to leak.Electrostatic, limit diaphragm will produce by the component friction of unlike material for fluid
Static conductive material can be used；For different material corrosivity, diaphragm chooses unlike material, but must have elasticity well.
The air inlet pipe is arranged for arc, and air inlet pipe outlet is arranged upward.
The body top is equipped with service hatch, mounting flange lid at service hatch.
The output port and input port is equipped with output port flange and input port flange.
Compared with prior art, advantageous effect possessed by the utility model is：
The utility model is isolated in valve inner using air inlet pipe, preceding inlet chamber and rear outlet chamber is isolated into, preceding
Unidirectional gravity force is set on inlet chamber input port and adsorbs the soft device of sealing, is suitable for the gas circulation of micro-pressure-difference conducting so that, from
The gas that input port enters air inlet pipe can be exported smoothly from output port, and the gas that air inlet pipe is entered from output port can not
It is exported from input port, formation irreversibly delivers, and gas barrier effect is good, thoroughly prevents collaborating between multiple air accumulators.
Description of the drawings
Fig. 1 is that low flow velocity one-way valve structures schematic diagram is connected in micro-pressure-difference.
Wherein, 1, output port flange 2, input port flange 3, valve body 4, blind flange 5, fixing axle 6, soft
Diaphragm 7, fixed orifice plate 8, preceding inlet chamber 9, rear outlet chamber 10, air inlet pipe.
Specific implementation mode
Fig. 1 is the most preferred embodiment of the utility model, and 1 pair of the utility model is described further below in conjunction with the accompanying drawings.
With reference to attached drawing 1：A kind of micro-pressure-difference conducting low flow velocity check valve, including valve body 3,3 both sides of valve body are correspondingly provided with output
Port and input port, valve body 3 are internally provided with air inlet pipe 10, and 10 inner cavity of air inlet pipe forms preceding inlet chamber 8,10 outside of air inlet pipe
3 inner cavity of valve body forms rear outlet chamber 9, and 8 one end of preceding inlet chamber is connected to input port, it is close that unidirectional gravity force absorption is equipped at the top of the other end
Seal apparatus.
Unidirectional gravity force absorption sealing device includes fixing axle 5, limit diaphragm 6 and fixed orifice plate 7, and fixed orifice plate 7 fixes peace
In the outlet of the air inlet pipe 10, limit diaphragm 6 is covered in 7 top of fixed orifice plate, and middle part is fixedly connected by fixing axle 5
Determine orifice plate 7.Air inlet pipe 10 is arranged for arc, and the outlet of air inlet pipe 10 is arranged upward.The top of valve body 3 is equipped with service hatch, at service hatch
Mounting flange lid 4.Output port and input port are equipped with output port flange 1 and input port flange 2.
Flange 1, flange 2 are used for connecting fluid conveyance conduit, cavity are formed in valve body 3, with fixed orifice plate 7 and limit diaphragm 6
For boundary, preceding inlet chamber 8 and rear outlet chamber 9 are formed, before fixed orifice plate 7 is welded on the nozzle of inlet chamber 8, limit diaphragm 6 is covered in
In fixed orifice plate 7, fixing axle 5 is fixed in fixed orifice plate 7.Repair blind flange 4 can be opened, for replacing limit diaphragm 6.
When input port pressure is higher than output port, fluid enters valve body 3 from entrance, passes through fixed orifice plate 7 mantle
Piece 6 jacks up, and limit diaphragm 6 generates deformation along the periphery of fixed orifice plate 7, and fluid is arranged by fixed orifice plate 7 from 3 output port of valve body
Go out.When output port pressure is higher than input port, limit diaphragm 6 is pressed in fixed orifice plate 7 by fluid, the hole quilt of fixed orifice plate 7
Closing, fluid can not flow back, and realize the function of one-way flow.When utility model works, it is mounted on the collection conduit of tidal air
On, for the unidirectionally controlled of low flow velocity gas.When storage tank is increased because of environment temperature, gas-phase space gas expansion in tank, storage tank
Pressure rise, gas need let-down vessel to enter tidal air collection conduit, and when storage tank rewinding, storage tank gas-phase space is compressed,
Pressure of storage tank increases, and gas also needs let-down vessel and enters tidal air collection conduit, and the tidal air before check valve is caused to collect
Pipeline pressure increases.Due to the dead weight very little of limit diaphragm 6 of check valve, as long as unidirectional upstream pressure is more than downstream pressure, formation gram
Admit defeated the minute-pressure of 6 gravity of diaphragm, limit diaphragm 6 is upwardly-deformed, and the trepanning in fixed orifice plate 7 is opened, and gas is flowed by fixed orifice plate 7
Check valve is crossed, into collection manifold or is directly entered breathing Flash Gas Compression Skid System.When storage tank because environment temperature reduces, gas phase is empty in tank
Between contraction of gas, pressure of storage tank reduces or when material delivering, and storage tank gas-phase space increases, and pressure of storage tank reduces, and can cause at this time unidirectional
Upstream pressure is less than unidirectional downstream pressure, and limit diaphragm 6 encloses fixed orifice plate 7, list because being covered in fixed orifice plate 7 from gravity
Storage tank cannot be flowed back into the gas after valve.When the gas collection line connection for there are multiple storage tanks, just carried out by respective check valve
Gas barrier, the gas that will not be formed between storage tank are mutually gone here and there, so that the material ensured in storage tank is not contaminated.
The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model
Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent
The equivalent embodiment of variation.But it is every without departing from the content of the technical scheme of the utility model, the technology according to the utility model is real
Any simple modification, equivalent variations and remodeling, still fall within the guarantor of technical solutions of the utility model made by confrontation above example
Protect range.
Claims (5)
1. low flow velocity check valve is connected in a kind of micro-pressure-difference, it is characterised in that：Including valve body（3）, valve body（3）Both sides are correspondingly provided with defeated
Exit port and input port, valve body（3）It is internally provided with air inlet pipe（10）, air inlet pipe（10）Inner cavity forms preceding inlet chamber（8）, air inlet
Pipe（10）The valve body in outside（3）Inner cavity forms rear outlet chamber（9）, preceding inlet chamber（8）One end is connected to input port, other end top
Sealing device is adsorbed equipped with unidirectional gravity force.
2. low flow velocity check valve is connected in a kind of micro-pressure-difference according to claim 1, it is characterised in that：The unidirectional gravity force
It includes fixing axle to adsorb sealing device（5）, limit diaphragm（6）And fixed orifice plate（7）, fixed orifice plate（7）It is fixedly mounted on described
Air inlet pipe（10）In outlet, limit diaphragm（6）It is covered in fixed orifice plate（7）Top, and middle part passes through fixing axle（5）It is fixedly connected
Determine orifice plate（7）.
3. low flow velocity check valve is connected in a kind of micro-pressure-difference according to claim 1 or 2, it is characterised in that：The air inlet
Pipe（10）It is arranged for arc, air inlet pipe（10）Outlet is arranged upward.
4. low flow velocity check valve is connected in a kind of micro-pressure-difference according to claim 1, it is characterised in that：The valve body（3）
Top is equipped with service hatch, mounting flange lid at service hatch（4）.
5. low flow velocity check valve is connected in a kind of micro-pressure-difference according to claim 1, it is characterised in that：The output port
It is equipped with output port flange with input port（1）With input port flange（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820385735.4U CN207989827U (en) | 2018-03-21 | 2018-03-21 | A kind of micro-pressure-difference conducting low flow velocity check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820385735.4U CN207989827U (en) | 2018-03-21 | 2018-03-21 | A kind of micro-pressure-difference conducting low flow velocity check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207989827U true CN207989827U (en) | 2018-10-19 |
Family
ID=63828677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820385735.4U Active CN207989827U (en) | 2018-03-21 | 2018-03-21 | A kind of micro-pressure-difference conducting low flow velocity check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207989827U (en) |
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2018
- 2018-03-21 CN CN201820385735.4U patent/CN207989827U/en active Active
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