CN207621370U - A kind of pressure-independent linear butterfly valve - Google Patents
A kind of pressure-independent linear butterfly valve Download PDFInfo
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- CN207621370U CN207621370U CN201721462632.5U CN201721462632U CN207621370U CN 207621370 U CN207621370 U CN 207621370U CN 201721462632 U CN201721462632 U CN 201721462632U CN 207621370 U CN207621370 U CN 207621370U
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- butterfly valve
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- blades
- sphere
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Abstract
A kind of pressure-independent linear butterfly valve, including butterfly valve and venturi valve, it is characterised in that：The butterfly valve includes the air valve blades that butterfly valve main body and diameter are less than butterfly valve inner major diameter,The air valve blades are mounted on by blade fixed link in butterfly valve main body,It is provided with the block for being matched with air valve blades and playing sealing and air quantity compensating action in the butterfly valve main body,The venturi valve includes venturi valve body and sphere,The sphere installation is on being provided with the sphere fixed link of compressed spring,Pass through the combination of linear butterfly valve and venturi valve,Not only realize the Linear Control of air quantity inside vent cabinet,And the Linear Control of ventilation quantity can be also realized under the conditions of different wind pressure,Prevent the unstability that wind pressure variation causes ventilation quantity to control inside ventilation shaft,It is adjusted when wind pressure changes and quickly adjusts ventilation quantity,Ensure the equilibrium of more vent cabinet ventilation quantities,Without manually realizing,Automatic Control,It is easy to control,It is easy to operate.
Description
Technical field
The utility model is related to vent cabinet technical fields, be specifically exactly apply it is on vent cabinet and unrelated with pressure
A kind of linear butterfly valve.
Background technology
Vent cabinet is an indispensable component part in laboratory ventilation design, in order to make laboratory worker not
Suck or swallow should have in the chemical substance and organism, laboratory that some are toxic, can causing a disease or toxicity is unknown it is good
Ventilation, to prevent some steams, gas and particle（Smog, coal smoke, dust and aerosol）Absorption, polluter must use ventilation
Cabinet, ventilator cowling or the method for local ventilation remove.
The ventilation valve body installed on current vent cabinet will appear ventilation inside ventilation shaft in the case of wind pressure difference
The variation of amount needs if realizing the stability contorting of ventilation shaft exhaust air rate under different wind pressure through air flow sensor or wind
The booster action of the electronic components such as pressure sensor could realize the control of ventilation quantity, and small wind pressure becomes inside pipeline
When change, sensor accuracy of detection cannot meet actual needs, or when wind pressure quickly changes, and need certain reaction time,
Order is sent out again by processing center is transferred to after signal collection again, is extended the time of adjusting, is reduced reaction speed, leads to wind
The control of valve is insensitive, and ventilation quantity changing for wind pressure small variation can occur therewith, for feelings such as more demanding laboratories
This air-valve cannot meet actual needs under condition.
Invention content
To solve the above-mentioned problems the purpose of this utility model is to provide a kind of pressure-independent linear butterfly valve, realize
Ventilation quantity Linear Control under different wind pressure, without other detection components, simple in structure, governing speed is fast.
The technical solution adopted by the utility model to solve its technical problems is that：A kind of pressure-independent linear butterfly valve,
Including butterfly valve and venturi valve, it is characterised in that：The butterfly valve includes that butterfly valve main body and diameter are less than butterfly valve inner major diameter
Air valve blades, the air valve blades are mounted in butterfly valve main body by blade fixed link, are provided in the butterfly valve main body
The block for playing sealing and air quantity compensating action is matched with air valve blades, the venturi valve includes venturi valve body and ball
Body, the sphere installation is on being provided with the sphere fixed link of compressed spring.
As an optimization, by being directly attached between the butterfly valve main body and venturi valve body.
As an optimization, the actuator for realizing air valve blades rotation, the execution are provided on the outside of the butterfly valve main body
Device is mounted on by reinforcement block in butterfly valve main body, is connected by shaft between the actuator and reinforcement block.
As an optimization, the electric pushrod on the actuator and link are hinged, one end of the link and leaf
Piece fixed link is clamped.
As an optimization, the spring-loaded other side of sphere fixed link peace passes through fixed between holder and venturi valve body
Connection.
As an optimization, the block is two semi-circular shape structures and the two is setting up and down, and half is located at air-valve leaf
The upside of piece, the other half is located at the downside of air valve blades.
As an optimization, the diameter of the air valve blades is more than the internal diameter of block and the outer diameter less than block, described
The outer diameter of block is identical as the internal diameter of butterfly valve main body.
As an optimization, the sphere is movably arranged in sphere fixed link, between the sphere fixed link and holder
It is bolted.
The utility model has the beneficial effects that：Compared with prior art, a kind of pressure-independent line of the utility model
Property butterfly valve the Linear Control of air quantity inside vent cabinet is not only realized by the combination of linear butterfly valve and venturi valve, and not
With the Linear Control that can also realize ventilation quantity under the conditions of wind pressure, prevent wind pressure variation inside ventilation shaft from ventilation quantity being caused to control
Unstability, regardless of the Linear Control that cannot all influence to ventilation quantity changed in pipeline wind pressure, butterfly valve realizes ventilation quantity
Linear Control, venturi realize wind pressure adjusting, when wind pressure change adjust quickly adjust ventilation quantity, guarantee more vent cabinets
The equilibrium of ventilation quantity realizes that Automatic Control is easy to control, easy to operate without artificial.
Description of the drawings
Fig. 1 is the utility model overall construction drawing；
Fig. 2 is state diagram when the utility model air valve blades are opened；
Fig. 3 is state diagram when the utility model air valve blades are closed；
Fig. 4 is the stereogram of the utility model butterfly valve；
Wherein, 1 air valve blades, 2 blade fixed links, 3 butterfly valve main bodys, 4 reinforcement blocks, 5 directly, 6 actuators, 7 electric pushrods,
8 links, 9 blocks, 10 venturi valve bodies, 11 spheres, 12 sphere fixed links, 13 springs, 14 holders.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.Therefore, below to attached
The detailed description of the embodiments of the present invention provided in figure is not intended to limit claimed the scope of the utility model,
But it is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without creative efforts belongs to the model of the utility model protection
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, do not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In embodiment as shown in Figure 1, a kind of pressure-independent linear butterfly valve, including butterfly valve and venturi valve, feature
It is：The butterfly valve includes the air valve blades 1 that butterfly valve main body 3 and diameter are less than 3 internal diameter of butterfly valve main body, the air valve blades
1 is mounted on by blade fixed link 2 in butterfly valve main body 3, is provided in the butterfly valve main body 3 and is closed with the matching of air valve blades 1
To the block 9 of sealing and air quantity compensating action, the venturi valve includes venturi valve body 10 and sphere 11, the sphere
11 be mounted on be provided in the sphere fixed link 12 of compressed spring 13.
When air valve blades rotate to parallel with butterfly valve body cross-section, the diameter of air valve blades is less than the interior of butterfly valve main body
Diameter, by the block for two semi-circular shape structures being arranged in butterfly valve main body, butterfly valve is fully sealed in realization, one subluxation of block
In the upper end of air valve blades, half is located at the lower end of air valve blades, realizes butterfly valve seal, while realizing that butterfly valve opens the wind at initial stage
Amount compensation.
As an optimization, it is attached by direct 5 between the butterfly valve main body 3 and venturi valve body 10.
As an optimization, 3 outside of butterfly valve main body is provided with the actuator 6 for realizing that air valve blades 1 rotate, and described holds
Row device 6 is mounted on by reinforcement block 4 in butterfly valve main body 3, is connected by shaft between the actuator 6 and reinforcement block 4.
As an optimization, the electric pushrod 7 on the actuator 6 and link 8 are hinged, one end of the link 8
It is clamped with blade fixed link 2.
As an optimization, the other side of the sphere fixed link 12 installation spring 13 passes through holder 14 and venturi valve body 10
Between be fixedly connected.
As an optimization, the block 9 is two semi-circular shape structures and the two is setting up and down, and half is located at air-valve leaf
The upside of piece 1, the other half is located at the downside of air valve blades 1.
As an optimization, the diameter of the air valve blades 1 is more than the internal diameter of block 9 and the outer diameter less than block 9, described
Block 9 outer diameter it is identical as the internal diameter of butterfly valve main body 3.
As an optimization, the sphere 11 is movably arranged in sphere fixed link 12, the sphere fixed link 12 and branch
It is bolted between frame 14.
Operation principle：
Butterfly valve by actuator control link, electric pushrod movement drive link realize rotation, link with it is electronic
Push rod is hinged, and link rotation is rotated with movable vane piece fixed link simultaneously, to realize that the air valve blades in blade fixed link are opened
Or it closes.
In figure 3, air valve blades are in completely closed state, and air valve blades prevent entire air-valve from leading to block
Wind, when actuator executes order, air valve blades rotation, air-valve is opened, and at the initial stage of unlatching, the ventilation quantity of butterfly valve is mainly air-valve
The size dehisced between blade and block realizes the control of air quantity, and dehiscing between blade and block is bigger, and air quantity is got over
Greatly, the calculation formula that the draught area of early period is is：S=π R2sina, wherein R are the radius of air valve blades, and a is air valve blades
Opening angle, with continuing on for air valve blades, when the distance between air valve blades and block and air valve blades and valve body
When the distance between inner wall is equal, the opening angle of air valve blades increases again, mainly by between air valve blades and valve body
Gap carry out the control that size realizes air quantity, the calculation formula that the ventilation quantity in later stage is is：S=πR²（1-cosa）+ π R2sina,
During entire unlatching, major mass part is acquired by Computer Corp. of the ventilation quantity in later stage, therefore, only in early period
Air valve blades are different from the calculating in later stage when unlatching, and the perfect condition for the Linear Control of butterfly valve is 45 degree of angle straight lines,
Therefore, it is necessary to realize infinite approach perfect condition line, obtained when 5 degree again of opening angle by empirical value, that is,
（1-cosa）Line translates up, and intersects with sina at 5 degree, is the Linear Control closest to perfect condition, in the ventilation of early period
Amount is by realizing compensation between air valve blades and block, if without block, simply by between air valve blades and valve body
Gap, air valve blades open early period, ventilation quantity can very little, and air valve blades unlatching could be realized to when certain angle
Certain ventilation quantity adds the form of block in such a way that valve body becomes larger after broadening, and realizes the compensation of ventilation early period,
The Linear Control that can realize air-valve simultaneously realizes Maximum Ventilatory Volume, the ventilation of linear butterfly valve when air valve blades fully open
Area is identical as the draught area of ventilation shaft, and the ventilation quantity for ensureing linear butterfly valve is identical as the ventilation quantity of ventilation shaft.
In fig. 2, air valve blades realize complete opening, when ventilation shaft internal pressure changes, with butterfly valve
The venturi valve of connection solves the problems, such as this, and the spring on venturi valve is stretched or extended by the variation of wind pressure, simultaneously
Realize that the promotion to the position of sphere, the draught area between sphere and venturi valve body realize the adjusting of ventilation quantity, due to
Wind pressure variation inside ventilation shaft, will necessarily result in the variation of the ventilation quantity inside ventilation shaft, but by adjust sphere with
Draught area between venturi valve body, efficiently solves the problems, such as this, realizes the automatic adjustment of wind pressure variation ventilation quantity, side
Just simple.
Above-mentioned specific implementation mode is only the specific case of the utility model, and the scope of patent protection of the utility model includes
But it is not limited to the product form and style of above-mentioned specific implementation mode, it is any to meet the utility model claims book and any institute
Belong to the appropriate changes or modifications that the those of ordinary skill of technical field does it, should all fall into the patent protection of the utility model
Range.
Claims (8)
1. a kind of pressure-independent linear butterfly valve, including butterfly valve and venturi valve, it is characterised in that：The butterfly valve includes butterfly
Valve body（3）It is less than butterfly valve main body with diameter（3）The air valve blades of internal diameter（1）, the air valve blades（1）It is fixed by blade
Bar（2）Mounted on butterfly valve main body（3）On, the butterfly valve main body（3）On be provided with and air valve blades（1）It matches and plays sealing
With the block of air quantity compensating action（9）, the venturi valve includes venturi valve body（10）And sphere（11）, the sphere
（11）Mounted on being provided with compressed spring（13）Sphere fixed link（12）On.
2. the pressure-independent linear butterfly valve of one kind according to claim 1, it is characterised in that：The butterfly valve main body
（3）With venturi valve body（10）Between by direct（5）It is attached.
3. the pressure-independent linear butterfly valve of one kind according to claim 1 or 2, it is characterised in that：The butterfly valve master
Body（3）Outside is provided with realization air valve blades（1）The actuator of rotation（6）, the actuator（6）Pass through reinforcement block（4）Peace
Mounted in butterfly valve main body（3）On, the actuator（6）With reinforcement block（4）Between connected by shaft.
4. the pressure-independent linear butterfly valve of one kind according to claim 3, it is characterised in that：The actuator（6）
On electric pushrod（7）With link（8）Hinged, described link（8）One end and blade fixed link（2）Clamping.
5. the pressure-independent linear butterfly valve of one kind according to claim 1 or 2, it is characterised in that：The sphere is solid
Fixed pole（12）Spring is installed（13）The other side pass through holder（14）With venturi valve body（10）Between be fixedly connected.
6. the pressure-independent linear butterfly valve of one kind according to claim 1, it is characterised in that：The block（9）For
Two semi-circular shape structures and the two is setting up and down, half is located at air valve blades（1）Upside, the other half is located at air valve blades
（1）Downside.
7. the pressure-independent linear butterfly valve of one kind according to claim 1, it is characterised in that：The air valve blades
（1）Diameter be more than block（9）Internal diameter and be less than block（9）Outer diameter, the block（9）Outer diameter and butterfly valve main body
（3）Internal diameter it is identical.
8. the pressure-independent linear butterfly valve of one kind according to claim 1, it is characterised in that：The sphere（11）It is living
It is dynamic to be mounted on sphere fixed link（12）On, the sphere fixed link（12）With holder（14）Between be bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721462632.5U CN207621370U (en) | 2017-11-06 | 2017-11-06 | A kind of pressure-independent linear butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721462632.5U CN207621370U (en) | 2017-11-06 | 2017-11-06 | A kind of pressure-independent linear butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207621370U true CN207621370U (en) | 2018-07-17 |
Family
ID=62827950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721462632.5U Active CN207621370U (en) | 2017-11-06 | 2017-11-06 | A kind of pressure-independent linear butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207621370U (en) |
-
2017
- 2017-11-06 CN CN201721462632.5U patent/CN207621370U/en active Active
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