CN202580055U - Soft sealing butterfly valve - Google Patents
Soft sealing butterfly valve Download PDFInfo
- Publication number
- CN202580055U CN202580055U CN 201220103562 CN201220103562U CN202580055U CN 202580055 U CN202580055 U CN 202580055U CN 201220103562 CN201220103562 CN 201220103562 CN 201220103562 U CN201220103562 U CN 201220103562U CN 202580055 U CN202580055 U CN 202580055U
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- CN
- China
- Prior art keywords
- valve
- seal ring
- flap
- sealing
- soft sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a soft sealing butterfly valve. The valve comprises a valve clack, a valve rod, a valve body, a sealing ring and a butterfly plate, wherein a valve body inner sealing structure comprises a valve clack, a valve base and a sealing ring. During sealing, a certain included angle space is reserved between the valve clack and the valve base. The valve is applicable to low-temperature fluid, under the condition of low temperatures, good sealing effects are achieved, and the valve is not easy to leak.
Description
Technical field
The utility model relates to a kind of butterfly valve, is specifically related to a kind of soft sealing butterfly valve.
Background technique
Butterfly valve is meant that circular butterfly plate that a kind of utilization is installed on the pipe diameter direction rotates the valve of opening, closing with the regulated fluid passage as open-shut device and with valve rod.Butterfly valve generally has compact structure, volume is little, in light weight, flow resistance is little and open and close characteristics such as rapid.Existing butterfly valve generally is divided into hard seal butterfly valve and soft sealing butterfly valve; The latter has directly increased seal ring between the sealing surface of the flap of contact and valve seat in the former sealing configuration; The latter's flap does not directly contact with valve seat like this; But the elastic strain through seal ring, thereby reach the purpose that itself and sealing surface closely contact, realize the sealing effect of butterfly valve.Soft sealing butterfly valve is owing to have seal ring; Therefore it is superior to hard seal butterfly valve on sealability; But when being applied to cryogen, its seal ring receives the influence of low temperature environment on every side easily and shrinkage is out of shape, and seal ring just can not closely contact with sealing surface; Cause its sealing effect bad, be easy to generate leakage.
The model utility content:
In view of this, the purpose of the utility model provides a kind of soft sealing butterfly valve, and it can be applied to cryogen, and under low temperature environment, good sealing effect is arranged, and is difficult for producing revealing.
For addressing the above problem, the technological scheme that the utility model provided is: a kind of soft sealing butterfly valve comprises flap, valve seat, valve rod, valve body, seal ring, butterfly plate; The valve body inner seal structure comprises flap, valve seat and seal ring; During sealing, leave the angle gap between said flap and the valve seat.
Preferably, said angle gap is 5 ° ± 1 °.
Preferably, said butterfly valve adopts two eccentric structures, and promptly the butterfly plate center had both been departed from the valve rod axle center, also departed from the valve body center.
Preferably, be connected with the seal ring pressing plate on the said butterfly plate.
Preferably, said flap is conical.
Preferably, the sealing surface between said flap and the valve seat is conical.
Preferably, said seal ring is embedded on the flap.
Preferably, said seal ring is positive circular.
Compared with prior art, when the utility model is employed in the sealing of soft sealing butterfly valve normal temperature, leave the angle gap between flap and the valve seat, can solve its problem like this in low temperature environment lower seal poor effect.The utility model leave the angle gap between flap and the valve seat in advance, and its seal ring contacts closely with sealing surface, can play the effect of sealing when valve closing; When valve is in the low temperature environment; Seal ring receives the influence of low temperature environment on every side and shrinkage is out of shape; Cause valve seal property influenced, at this moment only need rotation valve rod to reduce the angle gap between flap and the valve seat, force its seal ring closely to contact once more with sealing surface; Just can reach sealing effect, produce thereby avoid revealing.Further, it can be conical adopting more excellent scheme such as sealing surface, and this can be when seal ring closely contacts with sealing surface once more, and the dynamics of rotation valve rod can be too big; The seal ring pressing plate is installed on flap, and this can make seal ring that the power of opening is radially arranged under the effect of its pressing plate, thereby seal ring is tightr with contacting of sealing surface, reaches better sealing effect.
Description of drawings
Fig. 1 is the sectional view of the utility model;
Fig. 2 is the partial enlarged drawing of A part among Fig. 1;
Fig. 3 is the partial enlarged drawing of B part among Fig. 1.
Embodiment
In order to make those skilled in the art understand the technological scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and specific embodiment.
Embodiment 1:
Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of soft sealing butterfly valve comprises flap 2, valve seat 1, seal ring 3, valve rod 8, valve body 7, butterfly plate 5; Valve body 7 inner seal structures comprise flap 2, valve seat 1 and seal ring 3; Butterfly valve adopts two eccentric structures, and promptly valve body 7 centers are also departed from valve rod 8 axis deviation butterfly plates 5 centers; During sealing, leave 5 ° angle gap 6 between flap 2 and the valve seat 1; Seal ring 3 is positive circular, is embedded on the flap 2, forms sealing pair; Be connected with seal ring pressing plate 4 on the butterfly plate 5; Flap 2 is conical, and it is a taper shape with sealing surface between the valve seat 1.
Embodiment 2:
Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of soft sealing butterfly valve comprises flap 2, valve seat 1, seal ring 3, valve rod 8, valve body 7, butterfly plate 5; Valve body 7 inner seal structures comprise flap 2, valve seat 1 and seal ring 3; Butterfly valve adopts two eccentric structures, and promptly valve body 7 centers are also departed from valve rod 8 axis deviation butterfly plates 5 centers; During sealing, leave 6 ° angle gap 6 between flap 2 and the valve seat 1; Seal ring 3 is positive circular, is embedded on the flap 2, forms sealing pair; Be connected with seal ring pressing plate 4 on the butterfly plate 5; Flap 2 is conical, and it is a taper shape with sealing surface between the valve seat 1.
Embodiment 3:
Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of soft sealing butterfly valve comprises flap 2, valve seat 1, seal ring 3, valve rod 8, valve body 7, butterfly plate 5; Valve body 7 inner seal structures comprise flap 2, valve seat 1 and seal ring 3; Butterfly valve adopts two eccentric structures, and promptly valve body 7 centers are also departed from valve rod 8 axis deviation butterfly plates 5 centers; During sealing, leave 4 ° angle gap 6 between flap 2 and the valve seat 1; Seal ring 3 is positive circular, is embedded on the flap 2, forms sealing pair; Be connected with seal ring pressing plate 4 on the butterfly plate 5; Flap 2 is conical, and it is a taper shape with sealing surface between the valve seat 1.
When the soft sealing butterfly valve of above-mentioned model utility is installed in initial sealing, leave 5 ° of left back angles between flap and the valve seat, and this moment, seal ring contacted closely with sealing surface, played the effect of sealing; More excellent, seal ring can produce an active force radially under the effect of seal ring pressing plate, can make its with sealing surface between contact closelyr, sealing effect is better.When being applied to cryogen; Though seal ring elasticity under low temperature environment disappears, and the shrinkage distortion takes place, and can the angle between flap and the valve seat diminished through rotation valve rod; Force seal ring closely to contact with sealing surface once more, thereby reach the effect of sealing; More excellent, the utility model adopts the sealing surface of taper, and this makes when utilizing rotation valve rod to force seal ring closely to contact with sealing surface once more, can not need can reach good sealing effect with bigger power.
Only be the preferred implementation of the utility model below, should be pointed out that above-mentioned preferred implementation should not be regarded as the restriction to the utility model, the protection domain of the utility model should be as the criterion with claim institute restricted portion.For those skilled in the art, in spirit that does not break away from the utility model and scope, can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (8)
1. a soft sealing butterfly valve comprises flap, valve seat, valve rod, valve body, seal ring, butterfly plate; The valve body inner seal structure comprises flap, valve seat and seal ring, it is characterized in that: during sealing, leave the angle gap between said flap and the valve seat.
2. soft sealing butterfly valve according to claim 1 is characterized in that: said angle gap is 5 ° ± 1 °.
3. according to the described soft sealing butterfly valve of arbitrary claim among the claim 1-2, it is characterized in that: said soft sealing butterfly valve adopts two eccentric structures, and promptly the butterfly plate center had both been departed from the valve rod axle center, also departed from the valve body center.
4. soft sealing butterfly valve according to claim 3 is characterized in that: be connected with the seal ring pressing plate on the said butterfly plate.
5. soft sealing butterfly valve according to claim 3 is characterized in that: said flap is for conical.
6. soft sealing butterfly valve according to claim 5 is characterized in that: the sealing surface between said flap and the valve seat is for conical.
7. soft sealing butterfly valve according to claim 3 is characterized in that: said seal ring is embedded on the flap.
8. soft sealing butterfly valve according to claim 3 is characterized in that: said seal ring is for positive circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220103562 CN202580055U (en) | 2012-03-19 | 2012-03-19 | Soft sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220103562 CN202580055U (en) | 2012-03-19 | 2012-03-19 | Soft sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202580055U true CN202580055U (en) | 2012-12-05 |
Family
ID=47249468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220103562 Expired - Fee Related CN202580055U (en) | 2012-03-19 | 2012-03-19 | Soft sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202580055U (en) |
-
2012
- 2012-03-19 CN CN 201220103562 patent/CN202580055U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140319 |