CN201661692U - Adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve - Google Patents
Adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve Download PDFInfo
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- CN201661692U CN201661692U CN2009202945471U CN200920294547U CN201661692U CN 201661692 U CN201661692 U CN 201661692U CN 2009202945471 U CN2009202945471 U CN 2009202945471U CN 200920294547 U CN200920294547 U CN 200920294547U CN 201661692 U CN201661692 U CN 201661692U
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Abstract
An adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve mainly comprises a valve body, a valve seat, a valve plate, a sealing ring, a valve rod, a gland, a bottom cover and a guide shaft sleeve, wherein the valve body is of a flange structure; one side of the valve body is provided with a mounting table of the valve seat; the valve seat is mounted on the mounting table and is tightly pressed by the gland; the gland is connected with the valve body by a screw; the sealing ring is arranged on the valve plate and can be adjusted freely on the valve plate so as to achieve the best sealing, and the sealing ring is of a replaceable split type structure; and the valve rod is provided with a crank shaft structure which can adjust the positions of the sealing ring and the valve seat, lead the assembly to be more convenient, and simultaneously lead the sealing ring to forcibly press the valve seat tightly, thus realizing two-way sealing. The adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve has the characteristics of free adjustment of sealing, two-way zero leakage, convenient assembly convenience, simple maintenance, long service life and the like.
Description
Technical field
The utility model relates to a kind of butterfly valve of three off-centre, especially a kind of adjustment swap formula two-way hard seal three eccentric butterfly valve belongs to a kind of control valve.
Background technique
Butterfly valve is a kind of of control valve, have and regulate and cut off two kinds of functions, it is a kind of regulating controller in the combination instrument, be to produce to carry out one of important step in the process automatic regulating system, it is accepted the output signal of regulation meter and closes and Open valve, reach the isoparametric automatic adjusting of pressure, temperature, flow and liquid level, can be widely used in the automatic adjusting and the telecontrol of chemical industry, oil, metallurgy, electric power, light textile industry.Described butterfly valve mainly contains concentric butterfly valve, single eccentric-butterfly-valve, double eccentric butterfly valve and three eccentric butterfly valve.The structure characteristic of butterfly valve is that valve rod axle center, butterfly plate center, body center are on same position with one heart.Simple in structure, easily manufactured.Common butterfly valve promptly belongs to this type of.Shortcoming is because butterfly plate and valve seat are in extruding, scraping state, big, the quick abrasion of torque all the time.For overcoming extruding, scraping, guaranteeing that sealability, valve seat adopt rubber or teflon elastomeric material basically thereby be subjected to the restriction of temperature in the use.The structure characteristic of single eccentric-butterfly-valve is the valve rod axis deviation, and thereby the butterfly plate center makes that the butterfly plate upper and lower end no longer becomes the revolution axle center, disperseed, alleviated the excessive compression of butterfly plate upper and lower end and valve seat.But because single eccentric configuration scraping phenomenon of butterfly plate and valve seat in the whole switching process of valve does not disappear, on application area and concentric butterfly valve is similar, so employing seldom.The structure characteristic of double eccentric butterfly valve is that the valve rod axle center is promptly departed from the butterfly plate center, also departed from the body center.The effect of two off-centre make valve be unlocked the back butterfly plate can immediately break away from valve seat, significantly eliminated butterfly plate and valve seat excessive compression, the phenomenon of swiping, alleviated the unlatching torque, reduced wearing and tearing, improved the valve seat life-span.The reducing significantly of scraping, also make double eccentric butterfly valve also can adopt metal seat valve simultaneously, improved the application of butterfly valve in the high temperature field.But because its sealing principle belongs to position seals structure, be butterfly plate with the sealing surface of valve seat be line contact, by the butterfly plate extruding resiliently deformable that valve seat caused produce sealing effect, event to closed position requirement very high (particularly metal seat valve), bearing capacity is low, Here it is it is believed that the reason that butterfly valve is not high pressure resistant, leakage rate is big why traditionally.This contradiction of double eccentric butterfly valve, again butterfly valve has been carried out for the third time eccentric.Its structure characteristic in the valve rod shaft core position off-centre of two off-centre, the cone type axis deviation that makes the butterfly plate sealing surface in the body cylinder axis, that is to say, no longer be that proper circle but ellipse, its sealing surface shape are also therefore asymmetric, one side favours body center line, another side and then is parallel to the body center line through the sealing section of eccentric back, butterfly plate for the third time.These eccentric for the third time maximum characteristics fundamentally changed seal construction, no longer be position seals but torsion sealing, promptly be not to rely on the resiliently deformable of valve seat but rely on the surface of contact of valve seat to press to reach sealing effect fully, therefore solved at one stroke this difficult problem of metal seat valve zero leakage and to press with pressure medium because of surface of contact be that high temperature that be directly proportional, high pressure resistant also is readily solved.
But present three eccentric butterfly valve, valve seat and valve body are integral structure, and valve seat can't be changed, if valve seat damage just can only be put in order valve replacement, maintenance cost is very high.And the fit dimension between valve plate and the valve seat can't adjust, and can only singly join, if there is an accessory size not in place, can only reform one, so assembling difficulty very.Had a strong impact on the quality of three eccentric butterfly valve.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and a kind of split type valve seat construction is provided, and valve seat and seal ring are interchangeable, seal ring can freely be adjusted, assembling, easy to maintenance, can realize the adjustment swap formula two-way hard seal three eccentric butterfly valve of two-way zero leakage.
The purpose of this utility model is finished by following technical solution, it mainly is made up of valve body, valve seat, valve plate, seal ring, valve rod, gland, bottom and guideway, described valve body is a flange arrangement, one side is provided with the valve seat mounting platform, described valve seat is installed on the described mounting platform, and is pressed in described valve seat by gland, and described gland is connected with valve body with screw, unload lower cover, replaceable valve seat.
Flange has the hole of wearing valve rod in the described valve body, valve rod passes from this hole, between valve rod center line and the valve base sealing center line off-centre is arranged, described valve rod passes the attachment hole of valve plate, and described seal ring is installed on the valve plate, is compressed by trim ring, seal ring can freely be adjusted on valve plate, to reach optimal seal, unload lower clamping ring, replaceable seal ring; Reach the exchange fully of valve seat and seal ring;
The potted line center of circle of described valve seat and seal ring and runner center line have an angle off-centre, i.e. the 3rd off-centre, and this structure can make switching process not have friction fully; One crankshaft structure is arranged on the described valve rod, can adjust the position of seal ring and valve seat, make assembling more convenient, can make seal ring force to compress valve seat simultaneously, realize two way sealed.
Characteristics such as the utility model belongs to a kind of improvement to prior art, and it has sealing freely adjusts, and two-way zero leakage is easy to assembly, easy to maintenance, and the life-span is long.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the 3rd an eccentric structure schematic representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done detailed introduction: shown in the accompanying drawing, the utility model mainly is made up of bottom 1, bottom pad 2, valve body 3, guide sleeve 4, gland 5, O type circle 6, valve seat 7, seal ring 8, valve plate 9, pin 10, valve rod 11, trim ring 12, filler 13, Gland 14.Described valve body 3 one sides are provided with described valve seat 7 mounting platforms, described valve seat 7 is installed on the mounting platform of valve body one side, compress with described gland 5 between valve seat 7 and the valve body 3, gland 5 usefulness screws are connected with valve body 3, seal with described O type circle 6 between gland and the valve body, prevent to leak outside, unload lower cover, replaceable valve seat; Flange has the hole of wearing described valve rod 11 in the described valve body 3, valve rod 11 passes from this hole, one eccentric L is arranged between valve rod center line and the valve base sealing center line, one eccentric e is arranged between valve rod center line and the runner center line, described valve rod 11 passes the attachment hole of valve plate 9, described seal ring 8 is a multilayered structure, be installed on the valve plate 9, compress with described trim ring 12 between seal ring 8 and the valve plate, seal ring 8 can freely be adjusted on valve plate 9, to reach the optimal seal effect, unload lower clamping ring 12, replaceable seal ring 8; Reach the exchange fully of valve seat and seal ring; The potted line center of circle of described valve seat and seal ring and runner center line have the eccentric α of an angle, i.e. the 3rd off-centre, and see shown in Figure 2: this structure can make switching process not have friction fully; On the described valve rod 11 crankshaft structure is arranged, can adjust the position of seal ring 8 and valve seat 7, make assembling more convenient, can make the seal ring Final 8 neutralize tight valve seat 7 simultaneously, realize two way sealed.
Claims (3)
1. adjustment swap formula two-way hard seal three eccentric butterfly valve, it mainly comprises by valve body, valve seat, valve plate, seal ring, valve rod, gland, bottom and guideway and forming, it is characterized in that described valve body is a flange arrangement, valve body one side is provided with the mounting platform of valve seat, described valve seat is installed on the described mounting platform, and being pressed in described valve seat by gland, described gland is connected with valve body with screw.
2. adjustment swap formula two-way hard seal three eccentric butterfly valve according to claim 1, it is characterized in that flange has the hole of wearing valve rod in the described valve body, valve rod passes from this hole, between valve rod center line and the valve base sealing center line off-centre is arranged, described valve rod passes the attachment hole of valve plate, described seal ring is installed on the valve plate, is compressed by trim ring.
3. adjustment swap formula two-way hard seal three eccentric butterfly valve according to claim 1 is characterized in that the potted line center of circle of described valve seat and seal ring and runner center line have an angle off-centre, i.e. the 3rd off-centre; One crankshaft structure that can adjust seal ring and valve seat position is arranged on the described valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202945471U CN201661692U (en) | 2009-12-16 | 2009-12-16 | Adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202945471U CN201661692U (en) | 2009-12-16 | 2009-12-16 | Adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661692U true CN201661692U (en) | 2010-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202945471U Expired - Lifetime CN201661692U (en) | 2009-12-16 | 2009-12-16 | Adjustable and interchangeable two-way three-eccentric hard-sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201661692U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661399A (en) * | 2012-05-18 | 2012-09-12 | 温州蓝天管件阀门有限公司 | Tri-eccentric butterfly valve |
| CN103470792A (en) * | 2013-09-23 | 2013-12-25 | 南通龙源电站阀门有限公司 | Triple-eccentric high-pressure butterfly valve capable of realizing online replacement of valve seat |
| CN104350312A (en) * | 2012-04-25 | 2015-02-11 | Qtrco公司 | Double-offset butterfly valve |
| CN105299285A (en) * | 2015-11-11 | 2016-02-03 | 上海东宝阀门制造有限公司 | Three-eccentric bidirectional all-metal hard-seal butterfly valve |
| CN106678379A (en) * | 2015-11-10 | 2017-05-17 | 大亚湾核电运营管理有限责任公司 | Large-sized isolation butterfly valve for nuclear power plant condensate pump inlet and sealing property lifting technology thereof |
-
2009
- 2009-12-16 CN CN2009202945471U patent/CN201661692U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104350312A (en) * | 2012-04-25 | 2015-02-11 | Qtrco公司 | Double-offset butterfly valve |
| CN102661399A (en) * | 2012-05-18 | 2012-09-12 | 温州蓝天管件阀门有限公司 | Tri-eccentric butterfly valve |
| CN102661399B (en) * | 2012-05-18 | 2014-07-23 | 温州蓝天管件阀门有限公司 | Tri-eccentric butterfly valve |
| CN103470792A (en) * | 2013-09-23 | 2013-12-25 | 南通龙源电站阀门有限公司 | Triple-eccentric high-pressure butterfly valve capable of realizing online replacement of valve seat |
| CN106678379A (en) * | 2015-11-10 | 2017-05-17 | 大亚湾核电运营管理有限责任公司 | Large-sized isolation butterfly valve for nuclear power plant condensate pump inlet and sealing property lifting technology thereof |
| CN105299285A (en) * | 2015-11-11 | 2016-02-03 | 上海东宝阀门制造有限公司 | Three-eccentric bidirectional all-metal hard-seal butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG YONGSHENG TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHEJIANG YSMETER CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 311407 deer mountain industrial zone, Zhejiang, Fuyang Patentee after: ZHEJIANG YONGSHENG TECHNOLOGY CO., LTD. Address before: 311407 deer Street Industrial Park, Fuyang, Zhejiang Patentee before: ZHEJIANG YONGSHENG INSTRUMENTATION CO., LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101201 |