CN209494999U - A kind of high temperature butterfly valve of low leakage - Google Patents
A kind of high temperature butterfly valve of low leakage Download PDFInfo
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- CN209494999U CN209494999U CN201920157069.3U CN201920157069U CN209494999U CN 209494999 U CN209494999 U CN 209494999U CN 201920157069 U CN201920157069 U CN 201920157069U CN 209494999 U CN209494999 U CN 209494999U
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Abstract
The utility model discloses a kind of high temperature butterfly valves of low leakage, including valve body, it is arranged in the intracorporal inner cavity of valve, the valve plate of inner cavity is set, the valve rod being connected on valve plate, inner cavity is divided into upstream cavity and downstream cavity by the valve plate, the upstream cavity and downstream cavity are divided into the biggish more than half chamber of area and the lesser smaller part chamber of area along valve rod center line respectively, the smaller part chamber of upstream cavity faces more than half chamber of downstream cavity and forms downstream side catching step in side wall, more than half chamber of upstream cavity faces the smaller part chamber of downstream cavity and forms upstream side catching step in side wall, valve plate be arranged between two catching steps and swing and limited be shelved on catching step, at least one catching step is equipped with fan-shaped elastomeric spring plate, the edge of valve plate is pressed on the elastomeric spring plate.The utility model can be effectively controlled leakage rate when high temperature using Asymmetry Valve body cavity and asymmetric valve plate, while guarantee flexibility and reliability operation of valve when for high-temperature medium.
Description
Technical field
It is especially a kind of to be let out for cutting off or adjusting the low of flow rate the utility model relates to a kind of high temperature butterfly valve
The high temperature butterfly valve of leakage quantity.
Background technique
In industrial production activities, various fluid media (medium)s are frequently involved, there must be particular conduit to arrange and be installed on pipe thus
All kinds of valves selection on road.When medium is high temperature fluid in pipeline, such as high temperature air and height in industry heating activity
Warm flue gas, the then performance requirement for needing to consider high-temperature medium to valve, such as valve flexibility after expanding with heat and contract with cold and reliability,
The problems such as leakage rate when closing, long-term or valve maintenance and service life after being used for multiple times.
General butterfly valve includes valve body, valve seat, valve rod, valve plate, which has inner cavity, and valve plate is located in the inner cavity, and valve
Its edge and valve seal or opening after plate rotation, and valve rod is used to that the valve plate to be driven to be rotated, the top of valve rod passes through valve
The rotating devices such as handle or actuator are connected to after the top of body.It can be just normally opened when general valve is in order to guarantee thermal expansion
It closes, it is larger that there are gaps between valve plate and valve body, and structure is too simple, causes valve leakage automatic inspection excessive or is unable to control, and influences
Industry security production.
Up to standard to ask for the requirement of such high temperature fluid site technique, valve is typically designed as double eccentric valves and three eccentricity
Valve, but the valve manufacturing difficulty of this design structure is big, and structure is complicated, and the cost that involves great expense is very high；Control precision is wanted
Ask very high, assembly technology is complicated；Complicated structure improves the difficulty of the work such as daily maintenance and maintenance simultaneously.
Summary of the invention
In view of the above-mentioned problems, in order to overcome the deficiencies of the prior art, the utility model provides it is a kind of have in high temperature or
The high temperature butterfly valve structure of alap leakage volume flow under person's cryogenic conditions, have be easy to manufacture and assemble, structure letter
The advantages that list, convenient maintenance.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of high temperature butterfly valve of low leakage, including valve body, the valve that the intracorporal inner cavity of valve is arranged in, inner cavity is arranged in
Inner cavity is divided into upstream cavity and downstream cavity, the upstream cavity and downstream cavity difference by plate, the valve rod being connected on valve plate, the valve plate
It is divided into the biggish more than half chamber of area and the lesser smaller part chamber of area along valve rod center line, the smaller part chamber of upstream cavity faces downstream cavity
More than half chamber and side wall formed downstream side catching step, more than half chamber of upstream cavity face the smaller part chamber of downstream cavity and
Side wall forms upstream side catching step, valve plate be arranged between two catching steps and swing and limited be shelved on backstop platform
On rank, at least one catching step is equipped with fan-shaped elastomeric spring plate, and the edge of valve plate is pressed on the elastomeric spring plate.
In utility model, the valve plate is divided into the different half portion of two areas in left and right along valve rod shaft axis.
In utility model, described two half portions are the different semi-disc of diameter.
In utility model, the upstream cavity and downstream cavity are divided into the different semicircle shape of diameter along valve rod center line respectively
More than half chamber and smaller part chamber.
In utility model, the side of the elastomeric spring plate stretches out catching step edge and is partly suspended in aerial formation alice,
The alice is tilted to fluid media (medium) downstream direction.
In utility model, the alice of elastomeric spring plate two sides is partly suspended in sky along the circumferential direction stretching of catching step
In and stretch out length cross valve rod shaft centerline.
In utility model, the elastomeric spring plate is fixed on the catching step of downstream side by pressing plate.
In utility model, valve seat is connected on the valve body, valve rod passes through valve seat and connect with driving mechanism.
In utility model, the top of the valve rod is connect with a reset spring.
In utility model, oil contained self lubrication bearing and graphite packing sealing ring are arranged on the valve rod.
The beneficial effects of the utility model are: the utility model is using Asymmetry Valve body cavity and asymmetric valve plate, collocation bullet
Property latch plate and reset spring etc. automatically reset pre-tightening apparatus, can be effectively controlled leakage rate when high temperature, while guaranteeing that valve exists
Flexibility and reliability operation when for high-temperature medium, guarantees the safety of industrial production activities, effective protection equipment and personnel, raising are set
Standby and device service life.The utility model is mainly used on industrial furnace pipe-line system existing for high temperature fluid medium,
Meet the occasion that can meet working performance and low leakage well under high temperature and low temperature condition.The utility model can be used for
Have compared in epipodium guaranteed request (NOx etc.) and the industrial furnace combustion system of power conservation requirement, used in the comburent air duct being preheated,
In smoke discharging pipe and other gas pipeline systems, as the adjusting of gas flow safety and cut-off equipment under the conditions of high/low temperature.
Detailed description of the invention
The present invention will be further described with embodiment with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of the present embodiment；
Fig. 2 is the schematic diagram of internal structure of valve body；
Fig. 3 is the direction the A view of Fig. 2；
Fig. 4 is the direction the B view of Fig. 2；
Fig. 5 is the C portion enlarged drawing of Fig. 2；
Fig. 6 is the schematic diagram of internal structure of valve seat；
Fig. 7 is the structural schematic diagram of another embodiment.
Specific embodiment
Referring to figs. 1 to Fig. 6, a kind of high temperature butterfly valve of low leakage provided by the present embodiment, including valve body 1, setting exist
Inner cavity 2 in valve body 1, the valve plate 3 being arranged in inside inner cavity 2, the valve rod 4 being connected on valve plate 3, the valve plate 3 divide inner cavity 2
For upstream cavity 21 and downstream cavity 22, upstream and downstream chamber is Asymmetry Valve body cavity, and the upstream cavity 21 and downstream cavity 22 are respectively along valve rod 4
Center line is divided into the biggish more than half chamber of area and the lesser smaller part chamber of area, and more than half chamber and smaller part chamber are different half of diameter
Round shape, the smaller part chamber of upstream cavity 21 face more than half chamber of downstream cavity 22 and form downstream side catching step 23 in side wall, on
More than half chamber of trip chamber 21 faces the smaller part chamber of downstream cavity 22 and forms upstream side catching step 24 in side wall, and valve plate 3 is arranged
It between two catching steps and is rotated by 90 ° and is limited and is shelved on catching step, set on the downstream side catching step 23
There is fan-shaped elastomeric spring plate 5, the one side edge of valve plate 3 is pressed in formation elastic packing side on the elastomeric spring plate 5, valve plate 3
Another side edge is pressed in formation rigid seal side on upstream side catching step 24.
As preferred embodiment, the valve plate 3 is stiffener, to ensure to generate under fluid medium pressure
Deformation, the valve of applicable greater flow.The valve plate 3 is divided into the different half portion of two areas in left and right, institute along 4 shaft axis of valve rod
Stating two half-unit is the different semi-disc of diameter.The valve plate 3 is connected by cushion block 10, screw 11 and centring pin 12 and valve rod 4
It connects, 4 axis deviation valve plate of valve rod, 3 center is made to disperse and alleviate so that 3 upper and lower ends of valve plate be made no longer to become revolution axle center
The clearance issues of valve plate 3 and valve body.Here, valve rod 4 may also extend through entire inner cavity 2, obtain lumen portion valve rod both ends all
Positioning, enhances its non-deformability.Valve plate 3 is connected by cushion block 10 with valve rod 4 by least one centring pin 12, can reach very
Good concentricity reduces installation cost, without adjustment.The valve plate 3 is along 4 direction of rotation of valve rod, i.e., in 4 rotation central axis line of valve rod
Two sides, they be two different radii sizes and substantially semicircle, it is ensured that opening and closing movement all will not
Interfere with valve body 1, can freely be rotated between 0-90 degree with valve rod 4.The rigid seal side semicircle area of the valve plate 3 of upstream side is
Greater than valve body latus rectum radius area, when medium air pressure is bigger, the pressure of the rigid seal side of upstream side valve plate is bigger, medium air pressure
Precompression is formed, plays self sealing action, and valve plate 3 directly squeezes the bullet on downstream side catching step 24 by leverage
Property latch plate 5 generate small flexible deformation and elastic tension power to eliminate the gap between valve plate 3, contact it is even closer can
It leans on, reaches better seal effect.And rigid seal side is located at upstream side can effectively enhance sealing effect.
Further, the elastomeric spring plate 5 selects high temperature resistant latch plate, while being suitable for thermal medium and cold medium, and lead to
It crosses pressing plate 13 to be fixed on downstream side catching step 23, pressing plate 13 is fan-shaped, and pressing plate 13 passes through at least two screws or other
Elastomeric spring plate 5 is fixed on catching step by fastener, makes elastomeric spring plate 5 that position not occurred by 3 dynamic effects of valve plate inclined
Difference has good stability to guarantee preferable sealing performance.Catching step edge half is stretched out in the side of the elastomeric spring plate 5
It is suspended in aerial formation alice 51, which tilts bending to fluid media (medium) downstream direction.51 structure of alice not only enhances close
Envelope effect can also make up product processing and the center in assembling process and angle offset problem, and compensation valve body 1 is processed
And the function of 3 thickness deviation of valve plate.Therefore, it is all easier to control in processing and assembling process.
In the present embodiment, the alice 51 of 5 two sides of elastomeric spring plate stretches out half along the circumferential direction of catching step and hangs
In the sky and the length stretched out crosses 4 shaft centerline of valve rod, well solved the semicircles of 3 two different radiis of valve plate with
Gap between 4 central axes of valve rod is addressed the sealing problem between valve rod both ends 4 and valve plate 3.
In the present embodiment, valve seat 6 is connected on the valve body 1, valve rod 4 passes through valve seat 6 and connect with driving mechanism, described
The top of valve rod 4 is connect with a reset spring 7, and the reset spring 7 is coil spring and passes through polygon connector and valve
Stem valve bar 4 is connected, and different pretightning forces can be preset and be adjusted to setting at least two positioning pins 14, for closing assisted, reaches
Better seal performance.Oil contained self lubrication bearing 8 and graphite packing sealing ring are at least arranged with close to driving end on the valve rod 4
9, to guarantee excellent elevated-temperature seal performance.
Referring to Fig. 7, this another embodiment, the structure and principle and above-described embodiment of the embodiment are essentially identical,
The difference is that: the alice 51 of 5 side of elastomeric spring plate does not simultaneously extend out catching step edge, but substantially with backstop platform
Rank edge is concordant.Due to and do not extend out, the corresponding half portion radius of valve plate 3 need to be slightly larger than downstream side catching step 23 radius, make
Valve plate 3 is pressed on elastomeric spring plate 5.The effect of the present embodiment and above-described embodiment is essentially identical, is its equivalent technology side
Case.
The working principle of the utility model is as follows:
One, valve opening acts: the units such as controller provide signal, and driving device is powered, and pass through the polygon on valve seat 6
Connector transmits torque on valve rod 4, needs the initial preload for overcoming reset spring 7 to be in default location (positioning pin 14) at this time
Power, valve rod 4 drive valve plate 3 to rotate, and so that valve plate 3 is gone to parallel flow direction from flowing vertically to, the asymmetric cavity of 1 upstream and downstream side of valve body
Connection, valve opening.
Two, valve closing motion: the units such as controller provide signal, and driving device powers off, the reset spring 7 on valve seat 6
By pretightning force band follower link, band ovable valve stem 4 is rotated again, and final drive valve plate 3, which turns to, to be flowed vertically to, and returns to closed position.This
When valve plate 3 large area half portion be pressed on upstream side catching step 24,7 pretightning force of reset spring and Fluid pressure are to compressing journey
Degree is positive to be influenced；The small area half portion of valve plate 3 is pressed in the bullet of the small tilting in the edge being fixed on downstream side catching step 23
Property latch plate 5 on generate elastic deformation compress and seal.7 pretightning force of reset spring is bigger, the small area half portion and elasticity of valve plate 3
Latch plate 5 is pressed tighter, and it is better to seal, and leakage rate is fewer；Fluid pressure is bigger, and the large area half portion stress of valve plate 3 is bigger, leads to
The leverage of valve rod 4 is crossed, the small area half portion of valve plate 3 is pressed tighter to elastomeric spring plate 5, and it is better to seal, and leakage rate is fewer.
The foregoing is merely the preferred embodiments of the utility model, as long as realizing the utility model with essentially identical means
The technical solution of purpose belongs within the protection scope of the utility model.
Claims (10)
1. a kind of high temperature butterfly valve of low leakage including valve body (1), the inner cavity (2) being arranged in valve body (1), is arranged in inner cavity
(2) inner cavity (2) are divided into upstream cavity (21) by internal valve plate (3), the valve rod (4) being connected on valve plate (3), the valve plate (3)
With downstream cavity (22), it is characterised in that: the upstream cavity (21) and downstream cavity (22) are divided into area along valve rod (4) center line respectively
Biggish more than half chamber and the lesser smaller part chamber of area, the smaller part chamber of upstream cavity (21) face more than half chamber of downstream cavity (22) and
Side wall formed downstream side catching step (23), more than half chamber of upstream cavity (21) face the smaller part chamber of downstream cavity (22) and
Side wall forms upstream side catching step (24), and valve plate (3) is arranged between two catching steps and is rotated by 90 ° and is limited and puts
It sets on catching step, at least one catching step is equipped with fan-shaped elastomeric spring plate (5), and the edge of valve plate (3) is pressed in this
On elastomeric spring plate (5).
2. a kind of high temperature butterfly valve of low leakage according to claim 1, it is characterised in that: the valve plate (3) is along valve rod
(4) shaft axis is divided into the different half portion of two areas in left and right.
3. a kind of high temperature butterfly valve of low leakage according to claim 2, it is characterised in that: described two half portions are diameter
Different semi-discs.
4. a kind of high temperature butterfly valve of low leakage according to claim 1, it is characterised in that: the upstream cavity (21) and under
Trip chamber (22) is divided into the more than half chamber and smaller part chamber of the different semicircle shape of diameter along valve rod (4) center line respectively.
5. a kind of high temperature butterfly valve of low leakage according to claim 1, it is characterised in that: the elastomeric spring plate (5)
Side stretch out catching step edge be partly suspended in it is aerial form alice (51), which inclines to fluid media (medium) downstream direction
Tiltedly.
6. a kind of high temperature butterfly valve of low leakage according to claim 1, it is characterised in that: the elastomeric spring plate (5)
The alice (51) of two sides stretches out the length for being partly suspended in and in the air and stretching out along the circumferential direction of catching step and crosses valve rod (4) shaft
Center line.
7. a kind of high temperature butterfly valve of low leakage according to claim 1, it is characterised in that: the elastomeric spring plate (5)
It is fixed on downstream side catching step (23) by pressing plate (13).
8. a kind of high temperature butterfly valve of low leakage according to any one of claims 1 to 7, it is characterised in that: the valve body (1)
On be connected with valve seat (6), valve rod (4) pass through valve seat (6) connect with driving mechanism.
9. a kind of high temperature butterfly valve of low leakage according to claim 8, it is characterised in that: the top of the valve rod (4)
It is connect with a reset spring (7).
10. a kind of high temperature butterfly valve of low leakage according to claim 8, it is characterised in that: be arranged on the valve rod (4)
There are oil contained self lubrication bearing (8) and graphite packing sealing ring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920157069.3U CN209494999U (en) | 2019-01-28 | 2019-01-28 | A kind of high temperature butterfly valve of low leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920157069.3U CN209494999U (en) | 2019-01-28 | 2019-01-28 | A kind of high temperature butterfly valve of low leakage |
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| Publication Number | Publication Date |
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| CN209494999U true CN209494999U (en) | 2019-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920157069.3U Active CN209494999U (en) | 2019-01-28 | 2019-01-28 | A kind of high temperature butterfly valve of low leakage |
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| CN (1) | CN209494999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538803A (en) * | 2019-01-28 | 2019-03-29 | 佛山市科皓燃烧设备制造有限公司 | A kind of high temperature butterfly valve of low leakage |
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2019
- 2019-01-28 CN CN201920157069.3U patent/CN209494999U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538803A (en) * | 2019-01-28 | 2019-03-29 | 佛山市科皓燃烧设备制造有限公司 | A kind of high temperature butterfly valve of low leakage |
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