CN203098893U - Metallic spherical seal connecting rod butterfly valve - Google Patents
Metallic spherical seal connecting rod butterfly valve Download PDFInfo
- Publication number
- CN203098893U CN203098893U CN 201220636638 CN201220636638U CN203098893U CN 203098893 U CN203098893 U CN 203098893U CN 201220636638 CN201220636638 CN 201220636638 CN 201220636638 U CN201220636638 U CN 201220636638U CN 203098893 U CN203098893 U CN 203098893U
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- valve
- spherical
- valve plate
- seal
- rotating turret
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- Expired - Fee Related
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Abstract
The utility model discloses a metallic spherical seal connecting rod butterfly valve, which comprises a valve body, a valve plate, a rotating stand, a pressing plate and a connecting rod mechanism. A seal surface between the valve body and the valve plate is a spherical surface; the rotating stand and the valve plate are in spherical linkage structural connection; the spherical linkage structural connection is formed by a spherical disk arranged on the rotating stand and spherical gaskets between the valve plate and the pressing plate; and a fit clearance between the spherical gasket and the spherical disk of the rotating stand is within a range of 0.2-0.5mm. Compared with the prior art, the metallic spherical seal connecting rod butterfly valve disclosed by the utility model has the advantages that the seal effect of the valve is good, and the precision is high; abrasive machining of the seal surface is simple and easy to implement; seal specific pressure required by the seal face is low; the power of a driving device is low; the self-cleaning performance of the seal face is good; when the valve is closed, the speed of fluid flowing through the clearance of the seal face is high, and the seal face is automatically swept; the seal face has no relative friction when the valve closed, and the service life is long; and the valve plate has certain floating quantum by a spherical linkage structure, the valve plate can be automatically centered when the valve is closed.
Description
Technical field
The utility model belongs to valve technology field, relates in particular on industrial heavy caliber, the high-temperature pipe and cuts off butterfly valve or metal flat seal butterfly valve with connecting rod.
Background technique
Now industries such as metallurgy, chemical industry, petrochemical industry are more and more higher to consumption reduction, reduction of discharging, environmental requirement, require the leakage rate of valve also more and more littler.In the prior art, the Baffle butterfly valve in that 600 ℃, the frequent occasion of switch are used because leakage rate is big, is eliminated gradually, and replacing is link butterfly valve.The link butterfly valve of prior art, sealing all is to adopt the plane sealing structure form between valve plate and the valve body, the deficiency of the link butterfly valve of prior art is: sealed precision is not high, can not guarantee the sealing state between valve body and the valve plate for a long time.Valve opening or turn-off transient are that the motion of rod system guarantees the valve plate parallel motion, when connecting rod link at unlubricated oil condition, can cause excesssive gap between axle and the hole when for a long time at high temperature,, high frequency is back and forth rotated, be difficult to guarantee that the valve plate parallel motion reaches sealing, valve long-term work meeting causes leakage; The sealing surface processing grinding of plane sealing valve is difficulty relatively, and very difficult assurance reaches high sealed precision requirement, and the seal pressure that the plane sealing valve needs when closing is big, and easily particle, impurity is pressed in when closing and causes leakage on the sealing surface; Be to be rigidly connected between valve plate and the linkage mechanism, make the non-adjustable of valve plate the heart.
Summary of the invention
The purpose of this utility model is to provide a kind of Metal Ball face seal Connecting rod butterfly valve, but makes the valve plate automatic centering, improves the valve seal precision, reduces cost, prolongs the working life of valve.
Technical solutions of the utility model are: Metal Ball face seal Connecting rod butterfly valve, comprise: valve body, valve plate and linkage mechanism, it is characterized in that: the sealing surface between described valve body and the valve plate is a sphere, valve seal position sphere arc length is 15～20mm, valve plate sealing position spherical arc length is 40～50mm, and the angle of ball face sealing on valve port diameter is 120 °; The center at the back side of the sealing surface of described valve plate is provided with groove, described Metal Ball face seal Connecting rod butterfly valve also comprises rotating turret and pressing plate, be connected for the spherical linkage structure between rotating turret and the valve plate, described rotating turret is the spike frame, and the montant of spike frame is a bar of linkage mechanism, and montant is a round bar, spike frame head is a spheric disk, the end face of spheric disk and bottom surface all are spheres, and spheric disk places in the central recess at the valve plate back side, matches with groove; Described pressing plate is that the center has the hole that cooperates with the montant of rotating turret, the borehole jack of pressing plate is on the montant of rotating turret, be fixed on the edge of the central recess at the valve plate back side, rotating turret head spheric disk is encapsulated in the central recess at the valve plate back side, described spherical linkage structure connection is to constitute by back spherical pad between the spheric disk bottom surface of preceding spherical pad between the central recess bottom at the spheric disk end face that is arranged on rotating turret and the valve plate back side and rotating turret and the pressing plate, spherical pad and back spherical pad are the ring-type spherical pads before described, matching gap between front and back spherical pad and the rotating turret spheric disk is in 0.2～0.5mm scope, the spherical linkage structure makes valve plate have certain amount of floating, automatic centering when closing.
Metal Ball face seal butterfly valve described in the utility model is characterized in that: described valve seal sphere is covered with the Si Taili cemented carbide, and the Si Taili hard alloy layer is that 2mm is thick, hardness HRC40～42; Described sealing surface of valve plate is covered with the Si Taili cemented carbide, and the Si Taili hard alloy layer is that 2mm is thick, hardness HRC45～50.
Metal Ball face seal butterfly valve described in the utility model is characterized in that: hardness HRC60 is handled on spherical pad surface, described front and back through nitriding.
Metal Ball face seal butterfly valve described in the utility model is characterized in that: described rotating turret head spheric disk face is covered with the Si Taili cemented carbide, hardness HRC42～45.
The utility model is compared with present technology and is had the following advantages:
1, valve seal is effective, precision is high.
2, the sealing surface abrasive machining is simple between valve body and the valve plate.
3, the required seal pressure of sealing surface is little.
4, drive unit power is little.
5, the sealing surface self-cleaning is good.Speed was fast when fluid was by the sealing surface gap when closing, and purged sealing surface automatically.
6, sealing surface does not have relative friction, long service life when closing.
7, the spherical linkage structure makes valve plate have certain amount of floating, but automatic centering when closing.
Description of drawings
The utility model accompanying drawing three width of cloth, wherein
Accompanying drawing 2 is enlarged views of the local valve body of I and sealing surface of valve plate among Fig. 1
In the accompanying drawing, 1. valve body 2. valve plates 3. spherical pads 4. rotating turrets 5. spherical pads 6. pressing plates 7. live axles 8 linkage mechanisms.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Metal Ball face seal Connecting rod butterfly valve comprises: valve body, valve plate, rotating turret, pressing plate and linkage mechanism, sealing surface between valve body and the valve plate is a sphere, valve seal position sphere arc length is 15～20mm, valve plate sealing position spherical arc length is 40～50mm, and the angle of ball face sealing on valve port diameter is 120 °; The center at the back side of the sealing surface of valve plate is provided with groove, be connected for the spherical linkage structure between rotating turret and the valve plate, rotating turret is the spike frame, the montant of spike frame is a bar of linkage mechanism, montant is a round bar, and spike frame head is a spheric disk, and the end face of spheric disk and bottom surface all are spheres, spheric disk places in the central recess at the valve plate back side, matches with groove; Pressing plate is that the center has the hole that cooperates with the montant of rotating turret, the borehole jack of pressing plate is on the montant of rotating turret, be fixed on the edge of the central recess at the valve plate back side, rotating turret head spheric disk is encapsulated in the central recess at the valve plate back side, the connection of spherical linkage structure is to constitute by back spherical pad between the spheric disk bottom surface of preceding spherical pad between the central recess bottom at the spheric disk end face that is arranged on rotating turret and the valve plate back side and rotating turret and the pressing plate, spherical pad and back spherical pad are the ring-type spherical pads before described, matching gap between front and back spherical pad and the rotating turret spheric disk is in 0.2～0.5mm scope, the spherical linkage structure makes valve plate have certain amount of floating, automatic centering when closing.Valve seal sphere and sealing surface of valve plate are covered with the Si Taili cemented carbide, and the Si Taili hard alloy layer is that 2mm is thick, valve seal sphere hardness HRC40～42; Sealing surface of valve plate hardness HRC45～50; Hardness HRC60 is handled on spherical pad (3,5) surface through nitriding.Rotating turret spherical rotation face is covered with the Si Taili cemented carbide, hardness HRC42～45.
Example shown in the drawings is the Metal Ball face seal Connecting rod butterfly valve erection drawing of PN1.0MPa.DN800.Valve body 1 is SR800 ± 0.05 with the sealing sphere of valve plate 2, the angle of sealing sphere on valve port diameter is 120 °, valve body 1 sealing face length 15mm, and the thick Si Taili hard alloy layer of 2mm arranged, valve plate 2 back side central recess are Φ 276mm, two of the spherical pads that one side has Spherical Surface S R600 ± 0.01 diameter circular arc (diameter of sphere) are housed in the central recess, place the end face and the bottom surface of rotating turret spheric disk respectively, the spheric disk of rotating turret 4 is clipped in the middle, the spheric disk of rotating turret 4 is SR600 ± 0.01 diameter circular arc, with pressing plate 6 spherical pad 3 and rotating turret 4 are fixed in the valve plate center hole again, the gap that cooperates between the sphere is 0.4mm, the surface hardness of spherical pad 3 is HRC60, and the ball surface hardness of rotating turret 4 is HRC45.
Claims (4)
1. Metal Ball face seal Connecting rod butterfly valve, comprise valve body (1), valve plate (2) and linkage mechanism (8), it is characterized in that: the sealing surface between described valve body (1) and the valve plate (2) is a sphere, valve seal position sphere arc length is 15～20mm, valve plate sealing position spherical arc length is 40～50mm, and the angle of sealing sphere on valve port diameter is 120 °; The center at the back side of the sealing surface of described valve plate (2) is provided with groove, described Metal Ball face seal Connecting rod butterfly valve also comprises rotating turret (4) and pressing plate (6), be connected for the spherical linkage structure between rotating turret (4) and the valve plate (2), described rotating turret (4) is the spike frame, the montant of spike frame is a bar of linkage mechanism, montant is a round bar, spike frame head is a spheric disk, the end face of spheric disk and bottom surface all are spheres, spheric disk places in the central recess at valve plate (2) back side, matches with groove; Described pressing plate (6) is that the center has the hole that cooperates with the montant of rotating turret (4), the borehole jack of pressing plate (6) is on the montant of rotating turret (4), be fixed on the edge of the central recess at valve plate (2) back side, rotating turret (4) head spheric disk is encapsulated in the central recess at valve plate (2) back side, described spherical linkage structure connection is to constitute by back spherical pad (5) between the spheric disk bottom surface of preceding spherical pad (3) between the central recess bottom at the spheric disk end face that is arranged on rotating turret (4) and valve plate (2) back side and rotating turret (4) and the pressing plate (6), spherical pad (3) and back spherical pad (5) are the ring-type spherical pads before described, front and back spherical pad (3,5) and the matching gap between rotating turret (4) spheric disk in 0.2～0.5mm scope, the spherical linkage structure makes valve plate (2) have certain amount of floating, automatic centering when closing.
2. according to the described Metal Ball face seal of claim 1 Connecting rod butterfly valve, it is characterized in that: described valve seal position sphere is covered with the Si Taili cemented carbide, and the Si Taili hard alloy layer is that 2mm is thick, hardness HRC40～42; Described valve plate sealing position sphere is covered with the Si Taili cemented carbide, and the Si Taili hard alloy layer is that 2mm is thick, hardness HRC45～50.
3. according to the described Metal Ball face seal of claim 1 Connecting rod butterfly valve, it is characterized in that: hardness HRC60 is handled on described front and back spherical pad (3,5) surface through nitriding.
4. according to the described Metal Ball face seal of claim 1 Connecting rod butterfly valve, it is characterized in that: described rotating turret (4) head spheric disk face is covered with the Si Taili cemented carbide, hardness HRC42～45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220636638 CN203098893U (en) | 2012-11-27 | 2012-11-27 | Metallic spherical seal connecting rod butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220636638 CN203098893U (en) | 2012-11-27 | 2012-11-27 | Metallic spherical seal connecting rod butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203098893U true CN203098893U (en) | 2013-07-31 |
Family
ID=48850298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220636638 Expired - Fee Related CN203098893U (en) | 2012-11-27 | 2012-11-27 | Metallic spherical seal connecting rod butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203098893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065685A (en) * | 2015-06-08 | 2015-11-18 | 江苏华太电力仪表有限公司 | Single-bar zero-friction butterfly valve with guide groove |
-
2012
- 2012-11-27 CN CN 201220636638 patent/CN203098893U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065685A (en) * | 2015-06-08 | 2015-11-18 | 江苏华太电力仪表有限公司 | Single-bar zero-friction butterfly valve with guide groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20151127 |