CN203809714U - Three-rod switch butterfly valve - Google Patents
Three-rod switch butterfly valve Download PDFInfo
- Publication number
- CN203809714U CN203809714U CN201420079559.3U CN201420079559U CN203809714U CN 203809714 U CN203809714 U CN 203809714U CN 201420079559 U CN201420079559 U CN 201420079559U CN 203809714 U CN203809714 U CN 203809714U
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- CN
- China
- Prior art keywords
- rod
- valve
- force
- arm
- seat
- 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 - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
Disclosed is a three-rod switch butterfly valve. The three-rod switch butterfly valve is mainly composed of a main valve portion and a driving portion, the main valve portion comprises a valve body, a valve seat is arranged in the valve body, openable valve clacks are disposed on the valve seat through a seal ring, the valve clacks are connected with a valve rod through a transmission mechanism group, the outer end of the valve rod is connected with the driving portion, the transmission mechanism group comprises a fixed rod, driven rods and a driving rod, one end of the driving rod is connected with the rotatable valve rod, the other end of the driving rod is hinged to a rod seat in the middle of the back of the valve clacks through a pin shaft, the rod seat is hinged to two driven rods, ends of the driven rods are hinged to the fixed rod which is fixed on the valve body, and the valve rod rotates to drive the driving rod so that when the valve clacks leave the valve seat, the driven rods perform corresponding rotation around a connecting supporting point of the fixed rod to form a four-connecting-rod mechanism composed of the driving rod, the rod seat, the driven rods and the fixed rod. The three-rod switch butterfly valve has the advantages that the structure is reasonable, usage is convenient and reliable, a sealing surface of the valve clacks and the valve seat is free of friction during opening and closing, the service life is long, and the like.
Description
Technical field
The utility model relates to a kind of three rod-types and switch butterfly valve, belong to the switch valve technical field that opens and closes use.
Background technique
In prior art, general butterfly valve structure exists sealing surface easily to wear and tear, and longevity cannot meet the defects such as the long-term non-maintaining service condition of main equipment; Because its gas-tight moment scope is larger, be difficult to realize maximum starting differential pressure protection, cannot be used for the adjustable occasion of the maximum starting differential pressure of process parameter requirement valve.Meanwhile, the General valve of comparing adopt four connecting-rod valve structures, employing be short bar type structure, it has following shortcoming: 1, valve is from full cut-off to standard-sized sheet, and the rotation angle of main valve stem is bigger than normal, has affected the opening speed of valve; 2, main valve stem is positioned at pipeline drift diameter, and the negotiability of valve is little; When valve opening, medium directly washes away main valve stem, and the unholiness material in medium is easily bonded in rotating shaft, has affected the working life of valve.
Model utility content
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides a kind of rational in infrastructure, easy to use, reliable, and in opening-closing process, flap and sealing surface of seat are without friction, and the life-span is long, is applicable to often to open and close three rod-types switching butterfly valves of occasion.
The purpose of this utility model completes by following technical solution, three described rod-types switch butterfly valve, it is mainly made up of primary valve part and drive part, described primary valve part comprises the valve body that is provided with valve seat in, on described valve seat, be mounted with flap to be opened/closed by seal ring, this flap is connecting a valve rod by one group of driving mechanism, the outer end of the valve rod described drive part of ining succession mutually.
Described driving mechanism is made up of fixing rod, follower lever and driving lever, one end of described driving lever is connected on the valve rod that can rotate, the other end is hinged on the pole socket in the middle of the flap back side with bearing pin, on described pole socket, be also hinged with two follower levers, the end of this follower lever is hinged on a fixing rod being fixed on valve body, and make driving lever under valve rod rotarily drives, when flap is lifted off a seat, follower lever rotatablely moves the connection fulcrum with fixing rod accordingly, forms a quadratic crank mechanism being made up of driving lever, pole socket, follower lever and fixing rod.
Described follower lever has two, one end portion wherein respectively by Du bearing hinge connection at the dual-side of pole socket, the other end also respectively by Du bearing hinge connection on two fixing rod ends that are individually fixed on valve body; Hinged place between described driving lever and pole socket is also provided with a Du bearing; The sealing surface of described flap adopts built-up welding stainless steel material to make, and supporting valve seat has the seal ring that adopts carbon fiber packing with it.
Described driving lever one end is fixedly connected with valve rod with key by axle sleeve, and the outer end of described valve rod is connected with the drive part being made up of double-acting cylinder, cylinder push-rod, the arm of force; Wherein the cylinder push-rod of double-acting cylinder is hinged by an end of bearing pin and the arm of force, and the other end of the described arm of force is fixedly connected with the outer end of described valve rod with key by axle sleeve.
Described cylinder push-rod is connected to by bearing pin in longitudinal connecting groove of the arm of force one end, and form an adjustable arm of force, be longitudinally provided with the lock adjustment screw of an adjustable cylinder push-rod at arm of force end link position facing to longitudinal connecting groove in the end of this adjustable arm of force.
Described cylinder push-rod is connected with the piston in double-acting cylinder, and described double-acting cylinder is fixed on case by connecting pin, and can rotate around case; On described case, be provided with the limiting stopper limiting for arm of force movement position.
Double-acting cylinder is under forward action of gas source, and cylinder push-rod acts on and regulates on the arm of force setting, and by key A carry-over moment, to valve rod, band ovable valve stem is rotated in the forward motion.The arm of force moves to the limiting stopper position on case, and opening process finishes, and corresponding flap also reaches fully open position.When reverse action of gas source is during at double-acting cylinder opposite side, cylinder push-rod retraction, pull the arm of force to do reversing motion, valve rod also does counterrotating campaign, drive the driving lever in primary valve part to do reversing motion, corresponding also reversing motion of follower lever, under driving lever and follower lever acting in conjunction, drive flap reversed turning and move on sealing surface of seat, closing process finishes.
The utility model provides keying moment by drive part, and primary valve part, under the driving of drive part, is carried out the keying campaign of flap, can realize in flap and valve seat opening-closing process without any friction, life-saving; Main valve flap is subject to back pressure effect, and pressure is higher, and flap sealing is more reliable; Flap is to be subject to back pressure effect, when valve open, overcome the back pressure of bearing on flap, and back pressure is larger, and valve cannot be opened, and utilizes this feature, can carry out the maximum starting differential pressure setting of valve; It has rational in infrastructure, easy to use, reliable, and in opening-closing process, flap and sealing surface of seat are without friction, and the life-span is long, is applicable to often to open and close the features such as occasion.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the structural representation of primary valve part described in the utility model.
Fig. 3 is the sectional structure of A-A shown in Fig. 2 schematic diagram.
Fig. 4 is the structural representation of drive part described in the utility model.
Fig. 5 is the sectional structure of B-B shown in Fig. 4 schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1, the utility model is mainly made up of primary valve part 1 and drive part 2, described primary valve part 1 comprises the valve body 4 that is provided with valve seat 3 in, on described valve seat 3, be mounted with flap 6 to be opened/closed by seal ring 5, this flap 6 is connecting a valve rod 7 by one group of driving mechanism, the outer end of the valve rod 7 described drive part 2 of ining succession mutually, is shown in shown in Fig. 2-3.
Driving mechanism shown in figure is by fixing rod 8, follower lever 9 and driving lever 10 form, one end of described driving lever 10 is connected on the valve rod 7 that can rotate, the other end is hinged on the pole socket 12 in the middle of flap 6 back sides with bearing pin 11, on described pole socket 12, be also hinged with two follower levers 9, the end of this follower lever 9 is hinged on a fixing rod 8 being fixed on valve body 4, and make driving lever 10 under valve rod 7 rotarily drives, flap 6 is lifted off a seat 3 o'clock, follower lever 9 rotatablely moves the connection fulcrum with fixing rod 8 accordingly, form one by driving lever 10, pole socket 12, the quadratic crank mechanism that follower lever 9 and fixing rod 8 form.
Follower lever 9 described in the utility model has two, and one end portion is wherein hinged on respectively the dual-side of pole socket 12 by Du bearing 13 symmetries, and the other end is also hinged on two fixing rod 8 ends that are individually fixed on valve body 4 by Du bearing 14 respectively; Hinged place between described driving lever 10 and pole socket 12 is also provided with a Du bearing 15.
Described driving lever 10 one end are fixedly connected with valve rod 7 with key 17 by axle sleeve 16, and the outer end of described valve rod 7 is connected with the drive part 2 being made up of double-acting cylinder 18, cylinder push-rod 19, the arm of force 20, sees shown in Fig. 4-5; Wherein on double-acting cylinder 18, include forward gas source inlet 21, oppositely gas source inlet 22 and inner piston, wherein piston is fixedly connected with cylinder push-rod 19, and cylinder push-rod 19 is hinged by an end of bearing pin and the arm of force 20, the other end of the described arm of force 20 is fixedly connected with the outer end of described valve rod 7 with key 26 by axle sleeve 25.
Shown in figure, described cylinder push-rod 19 is connected to by bearing pin in longitudinal connecting groove 27 of the arm of force 20 1 ends, and form an adjustable arm of force, be longitudinally provided with the lock adjustment screw 28 of an adjustable cylinder push-rod at arm of force end link position facing to longitudinal connecting groove 27 in the end of this adjustable arm of force 20.
Double-acting cylinder 18 described in the utility model is fixed on case 29 by connecting pin, and can rotate around case 29; On described case 29, be provided with the limiting stopper 30 limiting for the arm of force 20 movement positions.
The utility model adopts Du bearing in the time that rod member rotate, to play self-lubricating function, and bearing pin is used for the connection between rod member, and is fixed with set screw.Valve rod 7 is under the effect of drive part 2, carry out rotation motion, drive driving lever 10 to do around valve rod 7 by axle sleeve 16 and key 17 and do rotatablely moving in several angle, meanwhile, follower lever 9, under the rotation of driving lever 10, rotates around the connection fulcrum of fixing rod 8, and flap 6 is under driving lever 10 and 9 liang of bar actings in conjunction of follower lever, the little displacement of 3 translation one of first lifting off a seat, then carry out flip-flop movement, complete the whole opening-closing process of flap 6.Realize valve opening and closing without friction feature.
The utility model also adopts soft sealing structure: seal ring 5 adopts the sealing surface of carbon fiber packing, flap 6 to adopt built-up welding stainless steel material.
Shown in Fig. 1, drive part 2 described in the utility model is arranged on the side of primary valve part 1 by valve rod 7, and it provides keying moment, and primary valve part, under the driving of drive part, is carried out the keying campaign of flap.Described primary valve part adopts the three rod-type kinds of drive to carry out flap and opens and closes motion, can realize in flap and valve seat opening-closing process without any friction, life-saving; Main valve flap is subject to back pressure effect, and pressure is higher, and flap sealing is more reliable; Flap is to be subject to back pressure effect, when valve open, overcome the back pressure of bearing on flap, and back pressure is larger, and valve cannot be opened, and utilizes this feature, can carry out the maximum starting differential pressure setting of valve.
Three described rod-types switch butterfly valve, and the arm of force of drive part is adjustable, thereby carry out the maximum starting differential pressure setting of valve.
Described primary valve part, valve rod is positioned at the top of valve body, be positioned at outside valve body latus rectum, medium directly washing away valve rod while having avoided valve opening, so both increased the negotiability of valve, can prevent that the unholiness material in medium is bonded in rotating shaft, improve the working life of valve, can adapt to various bad working environments requirements simultaneously; This structure has ensured that valve rod rotates less angle and just can make valve wide open simultaneously, has reduced the time of valve opening and closing.
The utility model can be realized maximum starting differential pressure protection; can just can open lower than setting pressure reduction lower valve; can effectively prevent from opening valve under High Pressure Difference; affect special process requirement; such as the molecular screener adsorbing system of sky in dividing; if opened, can cause molecular sieve punch press accident under High Pressure Difference.
Claims (4)
1. a rod-type switches butterfly valve, it is mainly made up of primary valve part and drive part, it is characterized in that described primary valve part comprises the valve body that is provided with valve seat in, on described valve seat, be mounted with flap to be opened/closed by seal ring, this flap is connecting a valve rod by one group of driving mechanism, the outer end of the valve rod described drive part of ining succession mutually; Described driving mechanism is made up of fixing rod, follower lever and driving lever, one end of described driving lever is connected on the valve rod that can rotate, the other end is hinged on the pole socket in the middle of the flap back side with bearing pin, on described pole socket, be also hinged with two follower levers, the end of this follower lever is hinged on a fixing rod being fixed on valve body, and make driving lever under valve rod rotarily drives, when flap is lifted off a seat, follower lever rotatablely moves the connection fulcrum with fixing rod accordingly, forms a quadratic crank mechanism being made up of driving lever, pole socket, follower lever and fixing rod; Described follower lever has two, one end portion wherein respectively by Du bearing hinge connection at the dual-side of pole socket, the other end also respectively by Du bearing hinge connection on two fixing rod ends that are individually fixed on valve body; Hinged place between described driving lever and pole socket is also provided with a Du bearing; The sealing surface of described flap adopts built-up welding stainless steel material to make, and supporting valve seat has the seal ring that adopts carbon fiber packing with it.
2. three rod-types according to claim 1 switch butterfly valve, it is characterized in that described driving lever one end is fixedly connected with valve rod with key by axle sleeve, and the outer end of described valve rod is connected with the drive part being made up of double-acting cylinder, cylinder push-rod, the arm of force; Wherein the cylinder push-rod of double-acting cylinder is hinged by an end of bearing pin and the arm of force, and the other end of the described arm of force is fixedly connected with the outer end of described valve rod with key by axle sleeve.
3. three rod-types according to claim 2 switch butterfly valve, it is characterized in that described cylinder push-rod is connected to by bearing pin in longitudinal connecting groove of the arm of force one end, and form an adjustable arm of force, be longitudinally provided with the lock adjustment screw of an adjustable cylinder push-rod at arm of force end link position facing to longitudinal connecting groove in the end of this adjustable arm of force.
4. three rod-types according to claim 3 switch butterfly valve, it is characterized in that described cylinder push-rod is connected with the piston in double-acting cylinder, and described double-acting cylinder is fixed on case by connecting pin, and can rotate around case; On described case, be provided with the limiting stopper limiting for arm of force movement position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420079559.3U CN203809714U (en) | 2014-02-25 | 2014-02-25 | Three-rod switch butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420079559.3U CN203809714U (en) | 2014-02-25 | 2014-02-25 | Three-rod switch butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809714U true CN203809714U (en) | 2014-09-03 |
Family
ID=51448464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420079559.3U Expired - Lifetime CN203809714U (en) | 2014-02-25 | 2014-02-25 | Three-rod switch butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821952A (en) * | 2014-02-25 | 2014-05-28 | 杭州杭氧工装泵阀有限公司 | Three-rod type switchover butterfly valve |
| CN105508634A (en) * | 2016-01-18 | 2016-04-20 | 株洲南方阀门股份有限公司 | Two-way metal hard-sealed butterfly valve |
-
2014
- 2014-02-25 CN CN201420079559.3U patent/CN203809714U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821952A (en) * | 2014-02-25 | 2014-05-28 | 杭州杭氧工装泵阀有限公司 | Three-rod type switchover butterfly valve |
| CN105508634A (en) * | 2016-01-18 | 2016-04-20 | 株洲南方阀门股份有限公司 | Two-way metal hard-sealed butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |